CEPS Pump Description and Procedures
30/11/2023
Page 1 of 42
CEPS Pump (Sand Bailer) Description and Procedures
Y.SARI
Date
Status
Written By
Reviewed By
CEPS Pump Description and Procedures
30/11/2023
Page 2 of 42
I. Executive summary
This document aims to describe the different parts and operation sequences of the CEPS
pump bailer design by CEPS engineering based in Colombia, better known within Perenco
Group by the name “Shakira pump”.
This document will try to give basic knowledge of the pump architecture, and procedures.
II. CEPS pump
A. Principle
The CEPS pump is connected to a work string (either thru tubing or casing depending on the
well), the pump is RIH at which point the tool is stroked in a manner similar to a sand pump.
The up-stroke evacuates sand from the well or tubing upward through the crown into the
chamber and as a result is trapped above the flapper valve which closes during the downstroke motion. As fluid reaches the piston assembly, it passes through a check valve and is
discharged through ports (of setting drain) back into the annulus side. This stroking is repeated
until the chamber is filled with sand and/or debris.
B. Operation mode
The pump can function in four modes:
-
Direct circulation.
Allow to pump fluids in direct through the work string, the pump and the flapper nozzle
(Φ = 8mm). The number of nozzles depend of the pump size.
o Rotation can be applied, Ω = [40; 80] RPM.
o Recommended rate from manufacturer, Q = [2:4] bpm according to annulus
size.
o WOB = [500;2000] lb, following Martin Decker accuracy.
-
Reverse circulation.
Allow to pump fluids in reverse circulation thought the annulus, through the flapper and
the pump. This mode is preferred when the annulus clearance is big.
-
Rotation.
Rotation can be applied to break sand bridges with or without circulation. When low
ROP is observed, rotate between [40;80] RPM is recommended for first 10 ft.
-
Reciprocation, which constitute the main suction mode (Operating reciprocating
mode detailed later).
The suction mode is achieved when the ball (for 2.250” pump) or traveling valve is drop
from surface. The traveling valve will lock in the setting drain and act a check valve
(close when P/U, open when S/O).
It is possible to use both circulation in direct/reverse while rotating. At this stage the CEPS
pump is not activated (no traveling valve inside setting drain) in reciprocating.
It is highly recommended to RIH without the traveling valve first to assess possible hard and
bridges, losses. A simple sand clean-out might be possible.
CEPS Pump Description and Procedures
30/11/2023
Page 3 of 42
However, once the traveling valve is drop reciprocation mode is activated. It means that the
CEPS pump acts as a plunger when upward/downward movement are initiated.
It is possible to recover circulation by blowing the sleeve to open ports (recommended practice
before reciprocating process in case of kick, avoid fluid at surfaces and better efficiency of the
check valve).
C. Pump parts
The tubing sand bailer is composed by several parts (from top to bottom)
- Setting drain.
- Top Kelly sub.
- Kelly bushing.
- Kelly sleeve.
- Kelly.
- Sub.
- Stuffing box.
- Piston sleeve.
- Piston.
- Chamber (composed of tubing).
- Flapper (additional equipment depending on configuration).
- Crown with flapper.
Figure 1: CEPS pump bailer
CEPS Pump Description and Procedures
30/11/2023
Page 4 of 42
Setting drain:
Seat of the ball or traveling valve, this seat allows to change from any mode to reciprocation.
The setting drain is composed by a sleeve (circulating ports) and shear pins. There is the
possibility to open ports to have the circulation back (above the pump at the setting drain ports).
Opening the ports happen just before the reciprocation process, mainly due to:
-
Recover circulation for well control event.
Ability to POOH dry.
Equalize pressure between casing/work string, avoid putting too much pressure on
check valve of the traveling valve.
Typically, the ports are open by pressure-up the work string. Each pin has a shearing value of
500 psi and up to 10x pins can be installed (Maximal blowing pressure to open ports = 5000
psi).
The shear pins used:
- Shear pin OD = 1/16” for 2.250” pump.
- Shear pin OD = 1/4" x 1/8” for 3.500” pump.
- Shear pin OD = 1/4" for 5.500” and 7.750” pump.
Usually, the length of shear pins is 7 mm long.
Sleeve
Shear pins (up to 10x)
Ports
Figure 2: Setting drain close (left) & setting drain with ports open (right), the pin connection is the bottom
CEPS Pump Description and Procedures
30/11/2023
Page 5 of 42
Example of traveling valve (use for 3.500”, 5.500” and 7.750” pump).
Packing element
Fishing neck
Lock wings
Figure 3: Traveling valves
Top Kelly sub:
This part aims to connect the Kelly to the setting drain / work string.
Typical connection of the top sub-Kelly:
- 1.90” 2.90# NTS8 box x pin for the 2.250” pump (work string 1.90” macaroni).
- 2-7/8” 6.40# EUE box x pin for the 3.500” pump (work string 2-7/8” EUE tubing).
- 3-1/2’ IF box x pin for the 5.500” and 7.750” pump (work string 4” 14# XT39 DP).
Kelly:
This hexagonal mandrel aims to transmit the upward/downward to the piston. It is connected
to the piston.
Typical size of Kelly:
- 1.500” for 2.250” pump.
- 2.250” for 3.500” pump.
- 3.890” for 5.500” pump.
- 5.3750” for 7.750” pump.
Figure 4: Kelly of the 2.250" pump
CEPS Pump Description and Procedures
30/11/2023
Page 6 of 42
Kelly bushing:
This part is connected to the Kelly sleeve and to transmit rotation to the bottom assembly
through the Kelly.
Typical connection:
- 1-15/16" ACME 10R pin for 2.250” pump.
- 3-1/2" FJWP pin for 3.500” pump.
- 5" FJWP pin for 5.500” pump.
- 7-5/8" FJWP pin for 7.750” pump.
Figure 5: 5.750" Kelly bushing for 7.750" pump
Kelly and piston sleeve:
Aims to protect Kelly and piston and connected using connection below:
- 1-15/16" ACME 10R box x pin for 2.250” pump.
- 3-1/2" FJWP box x pin for 3.500” pump.
- 5" FJWP box x pin for 5.500” pump.
- 7-5/8" FJWP box x pin for 7.750” pump.
Stuffing box:
Aims to connect the piston sleeve to the Kelly sleeve and allow sealing of piston during
upward/downward course.
Piston:
Thanks to upward/downward movement, the piston allow sand to be suck and settle inside the
chamber.
Typical piston sizes are:
- 1-5/16 8R box for 2.250” pump.
- 2-3/8" EUE for 3.500” pump.
- 2 7/8" EUE for 5.500” pump.
- 4-1/2" EUE for 7.750” pump.
-
30/11/2023
CEPS Pump Description and Procedures
Page 7 of 42
Figure 6: Pistons for 3.500" pump (left) and 7.750" pump (right)
Chamber:
The chamber is composed of tubing, it allows the sand to settle and to be stock while
reciprocating. The number of tubing for the chamber as per CEPS representative:
Pump size (in)
2.250
3.500
5.500
7.750
Number of tubing
joints
20
45
65
65
OD of tubing (in)
1.90”
2-3/8 or 2-7/8
4.500
4.500 or 5.500
Through completion
(OD/ID)
3.500 / 2.992
4.500 / 3.958
7 / 6.184
9.625 / 8.535
There is a rule of thumbs to calculate the number of joint for the chamber:
𝐿𝑒𝑛𝑔𝑡ℎ 𝑜𝑓 𝑐ℎ𝑎𝑚𝑏𝑒𝑟 = 𝐿𝑒𝑛𝑔𝑡ℎ 𝑓𝑎𝑐𝑡𝑜𝑟 ∗ 𝐴𝑚𝑜𝑢𝑛𝑡 𝑜𝑓 𝑓𝑖𝑙𝑙 ∗ 1.33
Where the length factor is: 𝑳𝒆𝒏𝒈𝒕𝒉 𝒇𝒂𝒄𝒕𝒐𝒓 =
𝑪𝒂𝒔𝒊𝒏𝒈 𝒐𝒓 𝒕𝒖𝒃𝒊𝒏𝒈 𝑰𝑫 𝟐
𝑪𝒉𝒂𝒎𝒃𝒆𝒓 𝑰𝑫
For example, In Trinidad and Tobago, TE06-B10 well, a sanded-up lower completion of 3.500”
ID and 2-3/8” OD tubing as chamber:
- ID screens = 3.500”.
- ID tubing = 1.995”.
- Height of fill = 391 ft.
𝐿𝑒𝑛𝑔𝑡ℎ 𝑓𝑎𝑐𝑡𝑜𝑟 =
3.500
1.995
= 3.078
𝐿𝑒𝑛𝑔𝑡ℎ 𝑜𝑓 𝑐ℎ𝑎𝑚𝑏𝑒𝑟 = 3.078 ∗ 391 ∗ 1.33 = 1601 𝑓𝑡
Which correspond to 53 joints.
CEPS Pump Description and Procedures
30/11/2023
Page 8 of 42
Crown:
The crown aims to break sand bridges while rotating and is composed by a flapper inside for
the reciprocating mode.
When reciprocating by picking up, the flapper inside the crown is open (upward course), when
closing the Kelly the flapper inside the crown is closed (downward course).
Figure 7: Crowns for 7.750”, 5.500” and 3.500” pumps
Figure 8: Flapper valve inside crown
A new feature is available, adding a new flapper above the crown. While reciprocating, it is
possible to damage or block the flapper inside the crown.
If this flapper is damage, the reciprocating process is jeopardized, and the pump must be
POOH and redress.
To prevent such hazards, a second flapper can be installed.
CEPS Pump Description and Procedures
30/11/2023
Page 9 of 42
Back-up
flapper valve
Figure 9: Primary and secondary flappers
III. General Operating Procedure
1. M/U and RIH CEPS pump with chambers. Record PUW/SOW of BHA.
2. Tag sand fill with 2 Klb.
3. Record PUW/SOW. At this stage the chamber is empty.
4. Circulate at Q = [2-4] bpm (depending on pump capacity). Do not reach shearing pressure
of setting drain.
 If returns, continue to washdown without using CEPS pump (no reciprocation).
 If no returns:
o If sand loose, P/U to disconnect joint and drop traveling valve. The traveling valve
falls at 300 ft / min. Ensure string is free before disconnecting joint.
o If sand is hard, circulate at Q = [2-4] bpm, Pmax = 80% * Pshear.
o After 5 m of progress P/U around 100 m, disconnect joint and drop traveling valve.
Note: The setting drain is dressed with shear pins, each pin will shear at 500 psi.
5.
M/U connection. M/U injection head and pump at Pshear to open ports. The settling ports
are now open
 If pins sheared, proceed to the next step.
CEPS Pump Description and Procedures

30/11/2023
Page 10 of 42
If pins do not shear, bleed-off to 0 psi. Pressure-up to Pshear if nothing happens,
then increase to Pshear + 500 psi. If pins not sheared, connect hose, and proceed
to next step. (As ports are not open, fluid will come to surface while reciprocating).
6. Record PUW/SOW, rotate to record torque.
7. RIH and tag fill with 2 klb. Confirm fill depth.
8. SOW +/- 4-10t to close Kelly, put a mark on string.
9. Start reciprocating by P/U 4-5 m (the stroke of the Kelly is between 1.8 m – 2.4 m).
 If pump is blocked it is a common practice to move upward and downward to avoid
sand settlement inside the crown 2 or 3 times.
10. P/U every 30 ft progress to confirm string is free. Record PUW/SOW.
11. RIH and tag fill, put a mark on string. It will allow to see the progress.
12. Repeat reciprocating until chamber is full.
 It is important to anticipate the total weight of string + BHA + sand inside chamber.
Note: Make sure the string is free before adding a connection.
IV.
CONFIGURATION TYPES:
1) Reciprocating configuration mode; this configuration allows to start pumping/bailing
directly, but it won’t allow any circulation through the bottom of the tool.
2) Forward / reverse circulation mode; This configuration allows to circulate through
the tool both ways (through nozzles of the flapper valves) and then can be converted
to the reciprocating configuration by dropping the travelling valve
1) Reciprocating Configuration
A- For 3-3/4” CEPS pump
B- For 5-1/2" CEPS pump
The pump, with its Sub Kelly valve type, apply a mechanical suction effect that allow solids
and sand recovery.
If you want to use CEPs pump without direct/reverse circulation you can use this configuration.
If as known there is free sand and there is no hard barrier on TOS, you can run that
configuration and start to use CEPs pump directly without circulation.
CEPS Pump Description and Procedures
A- 3 3/4” Shakira Pump Reciprocating Configuration:
30/11/2023
Page 11 of 42
CEPS Pump Description and Procedures
30/11/2023
Page 12 of 42
1) Crown : Connect Flapper or Dart type valve to crown:
Note: Flapper valve design good for recover Formation sands and Dart type valve good
for recovery of Proppant sand.
Crown
Flapper Type
Dart Type
CEPS Pump Description and Procedures
30/11/2023
Page 13 of 42
Note: If you use flapper type valve it is recommended to use 2 Flapper valves at same time. If
one of them fails, another one will be second barrier. Use CEPs pup joint between the 2 flapper
valves.
2) Chambers : Use tubings (2 7/8”, 3 ½”, …) as chamber for sand recovery. Calculate
chamber needs as per sand volume in well; it is recommended that to use min 15
joints of tubing as chambers.
3) Cage Valve : For cleaning in horizontal wells, CEPs filter can be connected to the Xover (below the CEPs pump assembly) to Cage Valve. Put the big metal ball between
Cage Valve and X-Over.
Note: There is a filter as seen at below picture. This filter recommended to use for horizontal
well. If you use the CEPs pump in horizontal well connect the filter below the filter X-over, there
is inner tread at X-over bottom (pin side).
Filter for Horizontal Well Sand Cleaning
CEPS Pump Description and Procedures
30/11/2023
Page 14 of 42
 With this configuration whenever you tag bottom you can start to use CEPs pump without
circulation. You can’t do circulation with this configuration.
Note: If you want to use circulation configuration, don’t forget to remove this ball from Cage
Valve to be able to do the circulation operation. It will be mentioned at Circulating
Configuration. Refer to the table at the end of the document.
4) Kelly-Piston Sleeve : Connect Kelly-Piston sleeve to Cage Valve while Piston and
Kelly inside the sleeve. Normally Kelly and Piston connected to each other like as
below and was put inside to sleeve. If you want to redress the piston seals, please
watch the video from below link.
https://cepssasmy.sharepoint.com/:v:/g/personal/oficinabogota_ceps_com_co/EXBz1FxMGyRFviT7U6IB4Q
oBqmAJgDzDZHLjKT_4QxNr3A?nav=eyJyZWZlcnJhbEluZm8iOnsicmVmZXJyYWxBcHAiOi
JPbmVEcml2ZUZvckJ1c2luZXNzIiwicmVmZXJyYWxBcHBQbGF0Zm9ybSI6IldlYiIsInJlZmVy
cmFsTW9kZSI6InZpZXciLCJyZWZlcnJhbFZpZXciOiJNeUZpbGVzTGlua0RpcmVjdCJ9fQ&e
=jeNoga
CEPS Pump Description and Procedures
Kelly Piston Sleeve while Kelly connected with top sub-Kelly
30/11/2023
Page 15 of 42
CEPS Pump Description and Procedures
30/11/2023
Page 16 of 42
Cage Valve and filter X-over connection to Kelly-Piston Sleeve
5) Two Way Valve : Connect 3 3/4” Two-way valve to top sub-Kelly.
Note: The Setting Drain already connected to top sub-Kelly. No need to remove it for two-way
valve connection. You can put all bronze pins (10 ea) on setting drain and secure it with shear
pins, then after directly you can connect two-way valve on setting drain.
3 ¾” Pump Setting Drain
3 ¾” pump Two-Way Valve
CEPS Pump Description and Procedures
30/11/2023
Page 17 of 42
B- 5 1/2” Shakira Pump Reciprocating Configuration:
1) Crown : Connect Flapper or Dart type valve crown:
Note: There is only 1 ea. dart type crown you can use it for 3 ¾” and 5 ½” pump configuration.
If you want to use flapper type crown you can use bigger size crown for 5 ½” pump.
5 ½” Pump Flapper type Crown ( with 2 flapper valves connected )
CEPS Pump Description and Procedures
30/11/2023
Page 18 of 42
2) Chambers : Use tubings (2 7/8”, 3 ½”, …) as chamber for sand recover. Calculate
chamber needs as per sand volume in well; it is recommended that to use min 15
joints of tubing as chambers.
3) Cage Valve : Connect CEPs X-over (5”FJCEPS Box x 3 ½” EUE PIN) (below the
CEPs pump assembly) to Dart type Cage Valve. Connect this valve between piston
sleeve and X-Over (5”FJCEPS Box x 3 ½” EUE PIN).
.
5 ½” Dart Type Cage Valve
Connect Cage valve between
piston sleeve and X-Over
 With this configuration whenever you tag to bottom, you can start to use CEPs pump
without circulation. You can’t do circulation with this configuration.
30/11/2023
CEPS Pump Description and Procedures
Page 19 of 42
4) Piston Sleeve and Kelly Sleeve : Connect cage valve to Piston Sleeve.
Note: Kelly Sleeve, Stuffing box & Piston Sleeve already connected to each other.
X-Over
Piston Sleeve
Kelly Sleeve
5) Two Way Valve : Connect 5 ½” Two-way valve to top Sub-Kelly.
Note: The Setting Drain already connected to top sub-Kelly. No need to remove it for two-way
valve connection. You can put all bronze pins (10ea) on setting drain and secure it with shear
pins, then after directly you can connect two-way valve on setting drain. Also, if needed the
setting drain can be removed from the assembly.
The two-way valve thread is 3 ½” IF Pin x Box. There is a X-over above Setting drain from 3
½” IF x 3 ½” EUE. To be able to connect the Two-way valve first you need to disconnect that
X-over.
5 1/2” Pump Setting Drain
CEPS Pump Description and Procedures
30/11/2023
Page 20 of 42
5 1/2” Pump Two-Way Valve
2) Direct / Reverse Circulation Configuration
The tool allows fluid pumping in direct or reverse mode to break sand bridges or interfaces that
can be consolidated on the top of the sand deposit through the ported flapper valves (these
ports allow up to 3-4 bpm at 1200-1500 psi depending on the CEPs pump size). After breaking
these bridges, the tool can be modified to be used as a reciprocating pump by dropping the
traveler valve. See detailed table at the end of the document.
A- 3 3/4” Shakira Pump Direct / Reverse Circulation Configuration:
1) Crown : Connect Flapper Type valve crown for circulation. There are jetting nozzles on
flapper valves, you can do the direct circulation from these nozzles:
CEPS Pump Description and Procedures
Crown
30/11/2023
Page 21 of 42
Flapper Type
If you use flapper type valve it is highly recommended to use 2 Flapper valves in tandem. If
one of them fails, another one will be second barrier. Use CEPs pup joint between 2 flapper
valves.
2) Chambers : Use tubings (2 7/8”, 3 ½”, …) as chamber for sand recover. Calculate
chamber needs as per sand volume in well; it is recommended that to use minimum 15
joints of tubing as chambers.
3) Cage Valve Without Ball inside : Connect CEPs filter X-over (below the CEPs
pump assembly) to Cage Valve. Remove big ball inside Cage Valve, so the cage valve
will become just a connection nipple between X-over and piston sleeve.
CEPS Pump Description and Procedures
30/11/2023
Page 22 of 42
4) Kelly-Piston Sleeve : Connect Kelly-Piston sleeve to Cage Valve while Piston and
Kelly inside the sleeve. Normally Kelly and Piston connected to each other like as below
and was put inside to sleeve. If you want to redress the piston seals, please watch the
video from below link.
https://cepssasmy.sharepoint.com/:v:/g/personal/oficinabogota_ceps_com_co/EXBz1FxMGyRFviT7U6IB4Q
oBqmAJgDzDZHLjKT_4QxNr3A?nav=eyJyZWZlcnJhbEluZm8iOnsicmVmZXJyYWxBcHAiOi
JPbmVEcml2ZUZvckJ1c2luZXNzIiwicmVmZXJyYWxBcHBQbGF0Zm9ybSI6IldlYiIsInJlZmVy
cmFsTW9kZSI6InZpZXciLCJyZWZlcnJhbFZpZXciOiJNeUZpbGVzTGlua0RpcmVjdCJ9fQ&e
=jeNoga
CEPS Pump Description and Procedures
30/11/2023
Page 23 of 42
Kelly Piston Sleeve while Kelly connected with top sub-Kelly
5) Setting Drain : Connect 3 3/4” Pump Setting Drain top sub-Kelly.
There are 10 shear pin seats on setting drain. You need to use 1/8” bronze pins for 3 ¾” Ceps
pump. The pins shear rating is 500 psi/ea.
3 ¾” Pump Setting Drain
CEPS Pump Description and Procedures
30/11/2023
Page 24 of 42
Note: As you can see below picture 3 ¾” pump setting drain pins are screwdriver connection
type and small extension at bottom. Do not mix the shear pins with 5 ½” pump’s pins, in this
case each pin will be sheared at 1700 psi instead of 500 psi.
Note: The pins are shear value is connected to differential pressure, if the well isn’t full and
there is pressure difference between casing and fully filled tubing, the pins shear value will be
decreased by the pressure difference.
For example, you use 5 pins and shear value is equal to 2,500 psi. If the fluid level in well at
600 m and after drop traveller valve, you fill up tubing with fresh water.
There will be 600 x 3.281 x 0.433 = 852 psi hydrostatic pressure difference between tubing
and casing. So, the pins shear at tubing head will be 2500-852=1,648 psi.
Therefore, during direct circulation through tubing, it is important to keep in mind shear
pressure of the pins.
When you connect the shear pins, don’t tighten the pins too much. Just tighten them until the
end and turn back 1/10 turn.
There are 2ea O-ring under Setting Drain. Before and after use the setting drain, check these
O-ring and replace them if damaged. For 3 ¾” Ceps pump you have to use P/N: OR-233/234.
Small O-ring will be set to bottom groove and big O-ring to the upper groove. Use grease after
CEPS Pump Description and Procedures
30/11/2023
Page 25 of 42
placed the O-rings. Be sure that Setting drain sleeve inside is cleaned.
B- 5 1/2” Shakira Pump Direct / Reverse Circulation Configuration:
1) Crown : Connect Flapper Type valve crown for circulation. There are jetting nozzles
on flapper valves, you can do the direct circulation from these nozzles:
Note: There is only 1ea dart type crown you can use it for 3 ¾” and 5 ½” pump configuration.
If you want to use flapper type crown you can use bigger size crown for 5 ½” pump.
5 ½” Pump Flapper type Crown (with 2 flappers valve connected)
CEPS Pump Description and Procedures
30/11/2023
Page 26 of 42
2) Chambers : Use tubings (2 7/8”, 3 ½”, …) as chamber for sand recover. Calculate
chamber needs as per sand volume in well; it is recommended that to use min 15 joint
of tubing as chamber.
3) X-over : Connect CEPs X-over (5”FJCEPS Box x 3 ½” EUE PIN) (below the CEPs
pump assembly) to Dart type Cage Valve. Connect this valve between piston sleeve
and X-Over (5”FJCEPS Box x 3 ½” EUE PIN).
Note:
Do not connect the Cage Valve above the X-over ( below piston sleeve) for this
configuration to be able to do any circulation.
.
5 ½” Dart Type Cage Valve
X-Over below the Piston sleeve
4) Piston Sleeve and Kelly Sleeve : Connect cage valve to Piston Sleeve.
Note: Kelly Sleeve, Stuffing box & Piston Sleeve already connected to each other.
30/11/2023
CEPS Pump Description and Procedures
X-Over
Piston Sleeve
Page 27 of 42
Kelly Sleeve
5) Setting Drain : Connect 5 1/2” Pump Setting Drain to top sub-Kelly.
There are 10 shear pin seats on setting drain. You need to use 1/4” bronze pins for 5 1/2”
Ceps pump. The pins shear rating is 500 psi/ea.
5 1/2” Pump Setting Drain
Note: As you can see below picture 5 1/2” pump setting drain pins are Allen connection type.
If you mix the shear pins with 3-3/4” pump’s pins, the pins will be sheared at a lower pressure.
CEPS Pump Description and Procedures
30/11/2023
Page 28 of 42
Note: The pins are shear value is connected to differential pressure, if the well isn’t full and
there is pressure difference between casing and fully filled tubing, the pins shear value will be
decreased by the pressure difference.
For example, you use 5 pins and shear value is equal to 2,500 psi. If the fluid level in well at
600 m and after drop traveller valve, you fill up tubing with fresh water.
There will be 600 x 3.281 x 0.433 = 852 psi hydrostatic pressure difference between tubing
and casing. So, the pins shear at tubing head will be 2500-852=1,648 psi.
Therefore, during direct circulation through tubing, it is important to keep in mind pins shear
pressure.
When you connect the shear pins, don’t tighten the pins too much. Just tighten them until the
end and turn back 1/10 turn.
There are 2ea O-ring under Setting Drain. Before and after use the setting drain, check these
O-ring and replace them if damaged. For 5 1/2” Ceps pump you have to use P/N: OR-245/247.
Small O-ring will be set to bottom groove and big O-ring to the upper groove. Use grease after
placed the O-rings. Be sure that Setting drain sleeve inside is cleaned.
CEPS Pump Description and Procedures
30/11/2023
Page 29 of 42
Note: Do not connect the Two-way valve below piston sleeve for this configuration to be able
to do circulation.
5 1/2” Pump Two-Way Valve
CEPS Pump Description and Procedures
30/11/2023
Page 30 of 42
Operating Procedures for Direct / Reverse Circulation Configuration:
 Check all components (x-over, pup joints, tubings, etc.…) IDs and confirm that the
traveler valve is adjusted to fit through the inner diameter of all components within the
tubing string. Drift all the components while before RIH.
 Validate the existence of jet holes/ports in the flapper valves.
 RIH Direct / Reverse Circulation configuration as setting drain sleeve close, and pins
attached position.
Note: Do not put traveler valve inside setting drain during RIH. It is highly recommended
to RIH without the traveling valve first to assess possible hard and bridges on top of
sand. A simple sand clean-out might be possible with circulation.
Traveler valve
 Check all components torque as per below torque table (especially crown and shoe
valves, as they may disconnected after previous operation for cleanup).
CEPS Pump Description and Procedures
30/11/2023
Page 31 of 42
 When you reach to TOS, reduce the running speed.
 Check and record PUW/SOW every 5 meter before tag the TOS.
 Verify the sand top, lower slowly, make contact, or rest on the bottom with a maximum
weight of 2,000 lbs., then lift it by 3 m. Record weight parameters while moving up and
down.
 Make arrangements for at least 4.5 m of Kelly above the work basket. When reaching the
top of the sand, initiate pumping at 3-4 bpm, fill the pipe, and continue pumping without
exceeding the burst pressure of the bronze pins (shear). Progress by gradually increasing
both pumping and weight from 10,000 to 20,000 lbs. If you successfully advance, stop until
you reach a maximum of 4.5 m (15 ft). Once this is achieved, raise the BHA approximately
10 joints (95 meters) and keep the string in motion.
CEPS Pump Description and Procedures
30/11/2023
Page 32 of 42
 Drop the traveler valve and pressurize to break bronze pins of the Setting Drain, allowing
column equalization.
Note: If there is high GOR expected in a well and if possibility of trapped gas suspected inside
the chambers, the ball spring inside traveller valve can be removed before dropping it to the
well. Check below pictures.
Remove traveler valve spring if needed
Drop traveler valve inside tubing
 Before drop traveler valve be sure lock spring is good condition and locks are
outside/open position.
CEPS Pump Description and Procedures
30/11/2023
Page 33 of 42
Important Note: There is a unlock pin (like a prong) for traveller valve. Don’t drop traveller
valve with this pin. That pin will be used after POOH the pump for unset the traveller valve from
its seat.
Tr. Valve
Unlock pin
If the traveler valve couldn’t reach its seat and lock, at this condition the CEPs pump is not
activated (no traveling valve inside setting drain) in reciprocating. So, while RIH drift
everything and be sure there are no debris left inside string.
 Lower down the crown to the top of the sand and start sand cleaning operation by
reciprocation with upward/downward movement. Keep in mind the piston stroke of the 33/4" pump is 1.92 m and 5-1/2" pump is 2.39 m, and the weight of the BHA. The
recommended weight to support the crown on the sand is based on this weight. For
example, if you are working with 5,000 lbs of weight and the BHA weighs 7,000 lbs, the
weight indicator reading should be a minimum of 12,000 lbs.
 Continue reciprocating with around 4-10 tons WOB depending of progress and until
reaching the target depth. You can reciprocate with up to 10t of weight. After give weight
on shoe pull the string around 4-5 meters with maximum pulling speed (if possible, with
unit1 ft/sec is recommended). Mark the string each time while giving same SOW on shoe
and check progress.
 If one joint run completed, no more SOW observes, you can continue add the tubing to the
string. Before adding each joint, check the string is free or not with up/down movement.
 After filling of the chamber and the cleaning finish until target depth, pull the string over
safe interval (i.e., above perforations), wait 1 hour for settling, and check the bottom. If it is
the expected bottom, pull the pump to the surface. If you encounter a blockage/off bottom,
the valve may be blocked. In that case, shake the string and reciprocate until the objective
is achieved.
CEPS Pump Description and Procedures
30/11/2023
Page 34 of 42
 After POOH CEPs pump, be careful while disconnecting CEPs pump from top first
Chamber. There may be some trapped pressure between pump and Chambers.
Disconnect the first joint slowly and let the pressure bleed off slowly between threads.
You can see the 5 ½” Direct/Reverse Circulating Configuration which used at MAN-B03 well
with 20 joint 3 1/2” EUE Chambers.
CEPS Pump Description and Procedures
30/11/2023
Page 35 of 42
V.
REDRESS PROCEDURES AFTER USAGE

After POOH disconnect Flapper valves and clean inside.

Check Flapper valves pins and springs. If there is any broken or not functioning one,
replace them with new ones.

Remove traveler valve from setting drain. Follow below steps for remove,
1) Connect retrieving tool to extension rod.
CEPS Pump Description and Procedures
30/11/2023
Page 36 of 42
2) Put lock releasing pin inside retrieving tool.
3) Insert retrieving tool and unsetting pin inside Setting drain from top of the pup joint
CEPS Pump Description and Procedures
30/11/2023
Page 37 of 42
4) Latch the traveler valve with retrieving tool. Unset the traveler valve with
hammering effect and pull out.
Dismantle Traveller Valve and check seals, lock springs, and seat ball. Change them if they
are broken, damaged or not good condition.

Clean setting drain sleeve. Changed the seals if damaged or not in good condition.
Remove broken shear pins. Put the setting drain sleeve in place and attach new
bronze pins.
CEPS Pump Description and Procedures

30/11/2023
Page 38 of 42
Check Kelly and piston movements. The movements of Kelly & piston should not be
weak (2-3 guys shouldn’t be push the Kelly inside).
If the Kelly & piston movements is soft, tight the piston seals.
 Use below tightening pin for 3 ¾” Ceps pump. Also, it is recommended to
change the piston seals after 7-8 usage. Please watch the video from below
link to see how you can tighten or change the piston seals.
https://cepssasmy.sharepoint.com/:v:/g/personal/oficinabogota_ceps_com_co/EXBz1FxMGyRFviT7U6IB4Q
oBqmAJgDzDZHLjKT_4QxNr3A?nav=eyJyZWZlcnJhbEluZm8iOnsicmVmZXJyYWxBcHAiOi
JPbmVEcml2ZUZvckJ1c2luZXNzIiwicmVmZXJyYWxBcHBQbGF0Zm9ybSI6IldlYiIsInJlZmVy
cmFsTW9kZSI6InZpZXciLCJyZWZlcnJhbFZpZXciOiJNeUZpbGVzTGlua0RpcmVjdCJ9fQ&e
=jeNoga
3 ¾” Ceps Pump Piston Seals Tightening Pin
 Use below tightening Sub for 5 ½” Ceps pump. Also, it is recommended to
change the piston seals after 7-8 usage. Please watch the videos from below
links (use Ctrl + mouse click for open the link) to see how you can tighten or
change the piston seals.
CEPS Pump Description and Procedures
30/11/2023
Page 39 of 42
5 1/2” Ceps Pump Piston Seals Tightening Sub
BEAS ASSEMBLY - YouTube
BEAS DISASSEMBLY - YouTube
PS PR 15 PruebaHidrostaticaDeLaBombaExtractora V1 VIDEO - YouTube
VI.
Typical BHA
In the CEPs pump, following pump sizes are available:
Size available
2.250
CEPS PUMP
3.500
5.500
7.750
2.250” CEPS pump:
BHA
Pump
Chamber
Crown
Parts
Setting drain
Top Kelly sub
Kelly bushing
Kelly sleeve
Kelly
Sub
Stuffing box
Piston sleeve
Piston
XO
1.9” tubing
X-over
Crown w/ flapper
OD (in)
2-1/4
2-1/4
2-1/4
2-1/8
1-1/2
1-5/8
2-1/4
2-1/8
1-1/2”
2-1/4
1.9
2-1/4
2-1/4
ID (in)
1-1/4
3/4
1-3/8
1-3/4
3/4
3/4
1-5/8
1-3/4
3/4
1-3/8
1.661
1-5/8
1-1/4
Length (ft)
1.27
0.50
0.28
5.57
5.25
0.42
1
5.13
6.41
0.53
480
0.57
0.660
Connection
1.90” NTS-8 box x pin
1.90” NTS-8 box x 1-5/16 8R pin
1-15/16” ACME 10R pin
1-15/16” ACME 10R box x pin
1-5/16 8R box x pin
1-5/16 8R box x pin
1-15/16” ACME 10R box x pin
1-15/16” ACME 10R box x pin
1-5/16” 8R box
1-15/16” ACME 10R x 1.90” NTS-8 pin
1.90” NTS-8 box x pin
1.90” NTS-8 box x 1-15/16” ACME 10R box
1-15/16” ACME 10R pin
CEPS Pump Description and Procedures
30/11/2023
Page 40 of 42
Note: the 2.250” pump can be used with 5/16” braided line, it was successfully used in
Colombia during the rigless intervention of ORO-03 well beginning of 2019.
They managed to recover 155 ft of sand inside a 3.500” tubing, the 2.250” pump was run using
3x 2-3/8” tubing as a chamber. An average of 30 ft with 2-3/8” was recover per run, a total of
15 runs were performed to recover all sand (10.3 ft of ROP inside 3.500” tubing).
Parameters used: WOB = 1300 – 1400 lb, no circulation and no rotation (S/L operation).
3.500” CEPS pump:
BHA
PUMP
Chamber
Crown
Parts
Setting drain
OD (in)
3.688
ID (in)
1.750
Length (ft)
1.170
Connection
2-7/8" 6.40# EUE box x pin
Top Kelly sub
Kelly bushing
Kelly sleeve
Kelly
Sub
3.500
3.266
3.266
2.250
2.266
1.125
2.297
2.516
2.516
1.281
0.700
0.260
5.120
5.020
0.590
2-7/8" EUE box x 2" ACME 6R box
N/A x 3-1/2" FJWP pin
3-1/2" FJWP box x pin
2" ACME 6R box x pin
2" ACME 6R box x 2-3/8" EUE pin
Stuffing box
3.281
1.266
1.240
3-1/2" FJWP box x pin
Piston sleeve
Piston
X-over
3.266
2.016
3.25
2.516
1.063
2.000
4.720
6.080
0.870
3-1/2" FJWP box x pin
2-3/8" EUE box
3-1/2" FJWP box x 2-7/8" EUE pin
2-7/8” EUE tubing
2.875
2.441
xxx
2-7/8 6.40# EUE box x pin
Crown w/ flapper
2.875
1.950
0.660
2-7/8" EUE box
5.500” CEPS pump:
BHA
Pump
Chamber
Crown
Parts
OD (in)
ID (in)
Length
(ft)
X-over
Setting drain
Top Kelly sub
5.5625
5.015625
1-3/4
2.40625
1.86
0.79
3-1/2” EUE box x 3-1/2” IF pin
3-1/2” IF box x pin
3-1/2’’ IF box x 3-1/2’’ ACME 4R
Kelly bushing
Kelly sleeve
5.578125
5.578125
3.40625
4.171875
0.36
8.56
5” FJWP pin
5” FJWP box x 5-1/2" FJWP pin
Kelly
3.890625
2.328125
8.45
3-1/2” ACME 4R pin x pin
Connection
X-over
4.015625
2.40625
0.68
3-1/2” ACME 4R box x 2-7/8” EUE pin
Stuffing box
5.59375
4.1875
1.77
5-1/2" FJWP box x 5" FJWP pin
Piston sleeve
5.00
4.171875
8.12
5" FJWP box x pin
Piston
X-over
3-1/2” tubing
Crown w/
flapper
4.015625
5
5.56
2.34375
3.8125
3.982
9.84
0.81
xxx
2-7/8” EUE box
5" FJWP box x 3-1/2" EUE pin
4-1/2” EUE box x pin
5.5625
4
1.04
3-1/2” EUE box
CEPS Pump Description and Procedures
30/11/2023
Page 41 of 42
7.750” CEPS pump:
BHA
Pump
Chamber
Crown
Parts
X-over
Setting drain
Top Kelly sub
Kelly bushing
Kelly sleeve
OD (in)
ID (in)
Length (ft)
5-9/16
6-1/16
7-3/4
7-3/4
1-3/4
2-3/4
5
6-9/16
1.86
1
0.69
7.73
Connection
4” 14# XT39 box x 3-1/2” IF pin
3-1/2” IF box x pin
3-1/2’’ IF box x 4-5/8’’ ACME 4R
7-5/8” FJWP pin
7-5/8” FJWP box x pin
Kelly
5-3/4”
3-11/32”
8.14
4-5/8” ACME 4R pin x pin
X-over
5-9/16
3-1/2
0.58
4-5/8” ACME 4R box x 4-1/2” EUE pin
Stuffing box
7-3/4
6-1/4
2.09
7-5/8" FJWP box x pin
Piston sleeve
7-3/4
6-9/16
7.92
7- 5/8" FJWP box x pin
Piston
X-over
5-1/2” tubing
X-over
Crown w/
flapper
6-1/8
7-3/4
4-1/2
7-3/4
3-1/8
4-5/8
3.982
4-5/8
10.35
0.81
1350
0.86
4-1/2” EUE box
7-5/8" FJWP box x 5-1/2” LTC pin
5-1/2” 17# LTC box x pin
5-1/2” LTC box x 7-5/8” FJWP pin
7-3/4
5-1/2
1.17
7-5/8” FJWP box
CEPS table for
configsrev1.xlsx
30/11/2023
CEPS Pump Description and Procedures
Page 42 of 42
CEPs Table for Configurations
CEPS Strings
2,25 " CEPS BHA
Pump
Length
(ft)
Connection
Setting drain 02/01/2004 01/01/2004
1.27
1.90” NTS-8 box x pin
Top Kelly sub 02/01/2004
Parts
OD (in)
ID (in)
0.50
1.90” NTS-8 box x 1-5/16 8R pin
Kelly bushing 02/01/2004 01/03/2008
0.28
1-15/16” ACME 10R pin
Kelly sleeve
Kelly
Sub
Stuffing box
02/01/2008 01/03/2004
01/01/2002
03-avr
01/05/2008
03-avr
02/01/2004 01/05/2008
5.57
5.25
0.42
1
1-15/16” ACME 10R box x pin
1-5/16 8R box x pin
1-5/16 8R box x pin
1-15/16” ACME 10R box x pin
Piston sleeve 02/01/2008 01/03/2004
5.13
1-15/16” ACME 10R box x pin
6.41
1-5/16” 8R box
1-15/16” ACME 10R x 1.90” NTS-8
pin
1.90” NTS-8 box x pin
1.90” NTS-8 box x 1-15/16” ACME
10R box
Piston
XO
1.9” tubing
Chamber
CEPS PUMP VALVE CONFIGURATIONS FOR DIFFERENT USES
1-1/2”
03-avr
03-avr
02/01/2004 01/03/2008
1.9
1.661
0.53
480
X-over
02/01/2004 01/05/2008
0.57
Crown
Crown w/
flapper
02/01/2004 01/01/2004
0.660
1-15/16” ACME 10R pin
3,5" CEPS BHA
Parts
OD (in)
ID (in)
Length
(ft)
Connection
Setting drain
3.688
1.750
1.170
2-7/8" 6.40# EUE box x pin
Top Kelly sub
3.500
1.125
0.700
2-7/8" EUE box x 2" ACME 6R box
PUMP
Kelly bushing
3.266
2.297
0.260
N/A x 3-1/2" FJWP pin
Kelly sleeve
Kelly
Sub
Stuffing box
3.266
2.250
2.266
3.281
2.516
2.516
1.281
1.266
5.120
5.020
0.590
1.240
3-1/2" FJWP box x pin
2" ACME 6R box x pin
2" ACME 6R box x 2-3/8" EUE pin
3-1/2" FJWP box x pin
Piston sleeve
3.266
2.516
4.720
3-1/2" FJWP box x pin
Piston
2.016
1.063
6.080
2-3/8" EUE box
0.870
3-1/2" FJWP box x 2-7/8" EUE pin
X-over
3.25
2.000
2-7/8” EUE
tubing
2.875
2.441
xxx
2-7/8 6.40# EUE box x pin
Crown
Crown w/
flapper
2.875
1.950
0.660
2-7/8" EUE box
5,5" CEPS BHA
Parts
OD (in)
ID (in)
Length
(ft)
Connection
Chamber
X-over
Setting drain
Pump
3-1/2” EUE box x 3-1/2” IF pin
5.5625
01/03/2004
1.86
3-1/2” IF box x pin
3-1/2’’ IF box x 3-1/2’’ ACME 4R
Top Kelly sub
5.015625
2.40625
0.79
Kelly bushing
5.578125
3.40625
0.36
5” FJWP pin
Kelly sleeve
Kelly
5.578125
3.890625
4.171875
2.328125
8.56
8.45
5” FJWP box x 5-1/2" FJWP pin
3-1/2” ACME 4R pin x pin
X-over
4.015625
2.40625
0.68
3-1/2” ACME 4R box x 2-7/8” EUE pin
Stuffing box
5.59375
4.1875
1.77
5-1/2" FJWP box x 5" FJWP pin
Piston sleeve
5.00
4.171875
8.12
5" FJWP box x pin
Piston
X-over
3-1/2” tubing
4.015625
5
5.56
2.34375
3.8125
3.982
9.84
0.81
xxx
2-7/8” EUE box
5" FJWP box x 3-1/2" EUE pin
4-1/2” EUE box x pin
Crown
Crown w/
flapper
5.5625
4
1.04
3-1/2” EUE box
7,75" CEPS BHA
Parts
OD (in)
ID (in)
Length
(ft)
Connection
Chamber
X-over
Pump
Chamber
Crown
4” 14# XT39 box x 3-1/2” IF pin
Setting drain 05/09/2016 01/03/2004
1.86
3-1/2” IF box x pin
Top Kelly sub 06/01/2016 02/03/2004
1
3-1/2’’ IF box x 4-5/8’’ ACME 4R
Kelly bushing 07/03/2004
0.69
7-5/8” FJWP pin
Kelly sleeve
Kelly
07/03/2004 06/09/2016
5-3/4”
3-11/32”
5
7.73
8.14
7-5/8” FJWP box x pin
4-5/8” ACME 4R pin x pin
X-over
05/09/2016 03/01/2002
0.58
4-5/8” ACME 4R box x 4-1/2” EUE pin
Stuffing box
07/03/2004 06/01/2004
2.09
7-5/8" FJWP box x pin
Piston sleeve 07/03/2004 06/09/2016
7.92
7- 5/8" FJWP box x pin
Piston
06/01/2008 03/01/2008
10.35
4-1/2” EUE box
X-over
07/03/2004 04/05/2008
0.81
7-5/8" FJWP box x 5-1/2” LTC pin
5-1/2” tubing 04/01/2002
3.982
X-over
07/03/2004 04/05/2008
1350
0.86
5-1/2” 17# LTC box x pin
5-1/2” LTC box x 7-5/8” FJWP pin
1.17
7-5/8” FJWP box
Crown w/
flapper
07/03/2004 05/01/2002
Direct/Reverse circulation configuration
Rotation Configuration
After cleaning operations are completed, this
configuration can be turned to the reciprocating
configuration by dropping a travelling valve. The
nozzles in the flapper valves allow the circulation.
This configuration is to rotate and clean/break
hard debris with the crown initially. It is the same
as direct/reverse circulation configuration
Setting drain needs to be pinned (attn; Differential Pressure Setting drain needs to be pinned (attn; Differential
applied to the pins) for circulation and avoiding wet pull
Pressure applied to the pins) for circulation and avoiding
after the clean-up
wet pull after the clean-up
No 2 way check valve to be installed
Travelling valve can be dropped for reciprocation after
circulation and cleaning operations finalized (the TW sets
inside the setting drain's nipple)
No 2 way check valve to be installed
Travelling valve can be dropped for reciprocation after
circulation and cleaning operations finalized (the TW sets
inside the setting drain's nipple)
No cage valve
No cage valve
Reciprocation Configuration
Install 2-way check valve (with slots), the setting drain not
used (pinned maximum and the pins not to be
sheared/operational)
Install the Cage valve designated for this size
Always install double flappers (with nozzles for sand/fines), Always install double flappers (with nozzles for
Always install double flappers (with nozzles for sand/fines)
verify if dart valve (for propppant) is needed, it can be used sand/fines), verify if dart valve (for propppant) is needed, it
or dart valve (for proppant)
for reverse circulation only.
can be used for reverse circulation only.
Setting drain needs to be pinned (attn; Differential Pressure Setting drain needs to be pinned (attn; Differential
applied to the pins) for circulation and avoiding wet pull
Pressure applied to the pins) for circulation and avoiding
after the clean-up
wet pull after the clean-up
No 2 way check valve.
Travelling valve can be dropped for reciprocation after
circulation and cleaning operations finalized (the TW sets
inside the setting drain's nipple)
No 2 way check valve.
Travelling valve can be dropped for reciprocation after
circulation and cleaning operations finalized (the TW sets
inside the setting drain's nipple)
No cage valve
No cage valve
Install 2-way check valve designated for this size
Install the Cage valve (ball type) designated for this
configuration, Use the filter assembly for horizontal wells
(connected to 2 way XO below the cage valve)
Always install double flappers (with nozzles for sand/fines), Always install double flappers (with nozzles for
Always install double flappers (with nozzles for sand/fines)
verify if dart valve (for propppant) is needed, it can be used sand/fines), verify if dart valve (for propppant) is needed, it
or dart valve (for proppant)
for reverse circulation only.
can be used for reverse circulation only.
Setting drain needs to be pinned (attn; Differential Pressure Setting drain needs to be pinned (attn; Differential
applied to the pins) for circulation and avoiding wet pull
Pressure applied to the pins) for circulation and avoiding
after the clean-up
wet pull after the clean-up
No 2 way check valve.
No 2 way check valve.
Travelling valve can be dropped for reciprocation after
Travelling valve can be dropped for reciprocation after
circulation and cleaning operations finalized (the TW sets circulation and cleaning operations finalized (the TW sets
inside the setting drain's nipple)
inside the setting drain's nipple)
No cage valve
No cage valve
Install the 2-way check valve designated for this
configuration
Install the cage valve (dart type with spring )
Always install double flappers (with nozzles for sand/fines), Always install double flappers (with nozzles for
Always install double flappers (with nozzles for
verify if dart valve (for propppant) is needed, it can be used sand/fines), verify if dart valve (for propppant) is needed, it sand/fines), verify if dart valve (for propppant) is needed, it
for reverse circulation only.
can be used for reverse circulation only.
can be used for reverse circulation only.
Setting drain needs to be pinned (attn; Differential Pressure Setting drain needs to be pinned (attn; Differential
applied to the pins) for circulation and avoiding wet pull
Pressure applied to the pins) for circulation and avoiding
after the clean-up
wet pull after the clean-up
No 2 way check valve.
No 2 way check valve.
Travelling valve can be dropped for reciprocation after
Travelling valve can be dropped for reciprocation after
circulation and cleaning operations finalized (the TW sets circulation and cleaning operations finalized (the TW sets
inside the setting drain's nipple)
inside the setting drain's nipple)
No cage valve
No cage valve
Install the 2-way check valve designated for this
configuration
Install the Cage valve designated for this size
Always install double flappers (with nozzles for sand/fines), Always install double flappers (with nozzles for
Always install double flappers (with nozzles for
verify if dart valve (for propppant) is needed, it can be used sand/fines), verify if dart valve (for propppant) is needed, it sand/fines), verify if dart valve (for propppant) is needed, it
for reverse circulation only.
can be used for reverse circulation only.
can be used for reverse circulation only.