Drill Stem Testing
Annulus Reference Trap System (ARTS)
The ARTS is used to trap a pressure in the reference section
of the Pressure Operated Tester Valve (POTV). Once this
reference pressure has been trapped, the POTV can then be
operated through the application and removal of applied
annulus pressure.
Specifications:
Working Pressure (psi/Mpa)
15,000psi/103.42 Mpa
Working Temperature (°F, °C)
350°F / 175°C
OD (in/mm)
5” / 127mm
ID (in/mm)
2.25”/57.2mm
Upper Thread connection
3 ¾” Stub Acme, 6 TPI
Lower Thread connection
3 ¾” Stub Acme, 6 TPI
Tensile Strength
350,000lbf/155,600daN
Tensile strength at Max working Pressure
30,000lbf/13,345daN
Tool Length (in/mm)
55.4in/1mm
Tool Weight (lbs/kg)
250 lbs/ 133 kg
Service condition
H2S per Nace MR-01-75
Operation:
The ARTS is run as part of the POTV/reference section. By isolating the
I.D. from the O.D. (i.e. setting a packer or placing seals into a sea bore)
and applying an annulus pressure, a reference is trapped in the POTV.
The POTV can now be operated by annulus pressure. The ARTS also
contains a check valve system which regulates the operating pressure. The
check valve also relieves the trapped reference pressure at the end of the
test as the tool is pulled to surface. This ensures that bottom hole pressure
is not brought to surface in the tool.
© Expro International Group LTD
AnnulusReferenceTrapSystem 290410_v2
exprogroup.com
Drill Stem Testing
Self Fill Tubing Tester Valve (SFTTV)
The SFTTV (Self Fill Tubing Tester Valve) provides a means of
pressure testing tubulars while running in the hole. The
flapper valve in the tool will only support pressure from above
thereby allowing completion fluid to enter the test string via
the bypass.
Specifications:
Working Pressure (psi/Mpa)
15,000psi/103.42 Mpa
Working Temperature (°F, °C)
350°F / 175°C
OD (in/mm)
5” / 127mm
ID (in/mm)
2.25”/57.2mm
Upper Thread connection
3 ¾” Stub Acme, 6 TPI
Lower Thread connection
3 ¾” Stub Acme, 6 TPI
Tensile Strength
350,000lbf/155,600daN
Tensile strength at Max working Pressure
30,000lbf/13,345daN
Tool Length ( in/mm)
74in/1879mm
Tool Weight (lbs/kg)
572 lbs/ 260 kg
Service condition
H2S per Nace MR-01-75
Operation:
When used in conjunction with permanent packer systems, the SFTTV will
allow fluid bypass when both stinging into and out of the packer. This is
possible by the incorporation of a normally open bypass port which enables
multiple entry to permanent packers without operating the tool.
When required the SFTTV can be fired open by applied annulus pressure of
circa 500psi.
The basic functions of the SFTTV are:
• To allow fluid fill of the tool string during entry
• To provide a method of testing the tool string during entry.
© Expro International Group LTD
SelfFillTubingTesterValve 230311_v3
exprogroup.com
Drill Stem Testing
Slip Joint (SLPJ)
The Slip Joint is a telescopic joint run in the tool string,
allowing five feet of free travel. It allows for tubing movement
caused by temperature changes. The tool is internally
pressure and volume balanced. It is also splined so that
torque can be transferred below the tool.
Specifications:
Working Pressure (psi/Mpa)
15,000psi/103.42 Mpa
Working Temperature (°F, °C)
350°F / 175°C
OD (in/mm)
5” / 127mm
ID (in/mm)
2.25”/57.2mm
Upper Thread connection
3 ½” IF
Lower Thread connection
3 ½” IF
Tensile Strength
350,000lbf/155,600daN
Tensile strength at Max working Pressure
30,000lbf/13,345daN
Tool Length ( in/mm)
267.9in/6805mm
Tool Weight (lbs/kg)
1,040 lbs/ 472 kg
Service condition
H2S per Nace MR-01-75
Operation:
Slip Joints should be run together in the work string when testing with
annulus pressure operated tools. At the time the packer is set the Slip Joints
will be 1/2 closed allowing for a maximum of expansion or contraction due to
changes in well conditions.
© Expro International Group LTD
SlipJoint 230311_v3
exprogroup.com
Drill Stem Testing
Safety Joint and Overshot (SFJT)
The Safety Joint provides for an emergency release between
the work string and the packer. In the event that the Safety
Joint is released, the Overshot can be run to reconnect the
work string with the packer assembly.
Specifications:
Working Pressure (psi/Mpa)
15,000psi/103.42 Mpa
Working Temperature (°F, °C)
350°F / 175°C
OD (in/mm)
5” / 127mm
ID (in/mm)
2.25”/57.2mm
Upper Thread connection
3 ½” IF
Lower Thread connection
3 ½” IF
Tensile Strength
350,000lbf/155,600daN
Tensile strength at Max working Pressure
30,000lbf/13,345daN
Tool Length ( in/mm)
27.2in/690.88mm
Tool Weight (lbs/kg)
140 lbs/ 63.6 kg
Service condition
H2S per Nace MR-01-75
Releasing operation:
The Safety Joint is run on the test string directly above the packer. Release
is effected by taking an upstrain on the test string and rotating to the right.
Release is controlled by make-up torque, which can be varied. Eleven turns
are required to back off the Safety Joint.
Retrieving operation:
The Safety Joint can be reconnected to the test string by slowly setting
down and rotating the overshot to the right into the retrieving threads.
© Expro International Group LTD
SafetyJointandOvershot 230311_v3
exprogroup.com
Drill Stem Testing
Pressure Operated Tester Valve (POTV)
The POTV is an annulus pressure-operated downhole ball
valve. It is run with a nitrogen section which compensates for
changes in annulus hydrostatic pressures. The POTV is
designed to work in conjunction with either retrievable or
permanent packers as no set-down weight is required when
operating. An optional index lock-open system allows
the ball to be retained open every second cycle. This lock
open feature allows the POTV to act as a fluid by-pass when
placing seals in a packer bore and aids in wireline and well kill
procedures.
Specifications:
Working Pressure (psi/Mpa)
15,000psi/103.42 Mpa
Working Temperature (°F, °C)
350°F / 175°C
OD (in/mm)
5” / 127mm
ID (in/mm)
2.25”/57.2mm
Upper Thread connection
3 ¾” Stub Acme, 6 TPI
Lower Thread connection
3 ¾” Stub Acme, 6 TPI
Tensile Strength
350,000lbf/155,600daN
Tensile strength at Max working Pressure
30,000lbf/13,345daN
Tool Length ( in/mm)
153in/3886mm
Tool Weight (lbs/kg)
640 lbs/ 290 kg
Service condition
H2S per Nace MR-01-75
Operation:
The POTV is run above the packer and recorder carriers in a cased hole test
string. Thereafter it provides for downhole shut-in and flowing test procedures
by selectively closing and opening the test string to flow. When the test
assembly is run to depth and the packer set, applied annulus pressure
causes the ball valve to rotate to the open position, allowing full bore passage
through the tool. It remains open until the pressure is bled off, or when
running the lock open feature, and closes when the tool is cycled again.
The POTV will normally be run in the lock open position, testing the string
against the Self Fill Tubing Tester Valve (SFTTV). If run in the closed position it
may be tested against as many times as desired. (If used in conjunction with
Expro’s circulating valves it provides an effective system for running TCP guns
in a well and establishing an underbalance by running a portion of the tubing
string dry).
© Expro International Group LTD
PressureOperatedTesterValve 230311_v3
exprogroup.com
Drill Stem Testing
Hydraulic Jar (JAR)
The Hydraulic Jar is used for the purpose of freeing stuck pipe
and tools in the wellbore. This device delivers heavy impact
blows to the test string by storing energy within the tool. In
well test applications the tool is run directly above the Safety
Joint. The Hydraulic Jar is designed to transmit torque and
withstand severe tensile and compressive loads.
Specifications:
Working Pressure (psi/Mpa
15,000psi/103.42 Mpa
Working Temperature (°F, °C)
350°F / 175°C
OD (in/mm)
5” / 127mm
ID (in/mm)
2.25”/57.2mm
Upper Thread connection
3 ½” IF
Lower Thread connection
3 ½” IF
Tensile Strength
350,000lbf/155,600daN
Tensile strength at Max working Pressure.
30,000lbf/13,345daN
Tool Length ( in/mm)
113.8in/2890mm
Tool Weight (lbs/kg)
525 lbs/ 133 kg
Service condition
H2S per Nace MR-01-75
Maximum overpull before the Jar fires
80,000lbs/36 tons
Operation:
The Hydraulic Jar is activated by picking up on the test string and holding
tension. The applied tension at the tool forces the oil in the oil chamber to
pass through a flow regulator at a controlled rate. This controlled action
continues until the piston reaches the grooved section of the cylinder bore;
the oil is then rapidly discharged at an uncontrolled rate to the lower section
of the oil chamber. This release of energy together with the energy stored in
the stretched test string causes the mandrel to accelerate upwards until the
mandrel hammer area strikes the anvil stop, delivering high impact force to
the stuck object. The tool is multi-use and can be rapidly re-cocked by
slacking off the work string.
© Expro International Group LTD
HydraulicJar 230311_v3
exprogroup.com
Drill Stem Testing
Multi Reverse Spot Tool (MRST)
The Multi-Reverse Spot Tool provides a means of establishing
communication between the annulus and the drill string. It has
three functional positions: closed, reverse, and circulate, and
may be run in the well in either the closed or reverse positions.
Specifications:
Working Pressure (psi/Mpa)
15,000psi/103.42 Mpa
Working Temperature (°F, °C)
350°F / 175°C
OD (in/mm)
5” / 127mm
ID (in/mm)
2.25”/57.2mm
Upper Thread connection
3 ¾” Stub Acme, 6 TPI
Lower Thread connection
3 ¾” Stub Acme, 6 TPI
Tensile Strength
350,000lbf/155,600daN
Tensile strength at Max working Pressure
30,000lbf/13,345daN
Tool Length (in/mm)
138.2in/3510mm
Tool Weight (lbs/kg)
575 lbs/ 261 kg
Service condition
H2S per Nace MR-01-75
Operation:
The tool may be cycled as many times as required. It may be used to
displace fluids before a test, to spot fluids (nitrogen or acid) and/or to reverse
circulate recovered fluids from the drill string.
© Expro International Group LTD
MultiReverseSpotTool 230311_v3
exprogroup.com
ExACT Tool 30/07/2013 08:04 Page 1
Drill Stem Testing
Expro Annulus-Operated Circulating and Test (ExACT™) Tool
The ExACT™ tool is a combined annulus operated multi-cycle, shut-in ball-circulating
valve. The unique ‘SmartCollet’ and interlocking system makes this tool highly
operationally flexible and efficient, requiring a maximum of four annulus pressure
cycles to place the ball and circulating ports in any required position, however the
ball and ports are mechanically prevented from being open at same time. As the
tool operates against a trapped reference pressure, there are no costly waiting times
between cycles.
The ExACT™ tool is placed above the packer assembly and gauge carriers and functions as a downhole shut-in
valve and a circulating valve for spotting underbalancing fluid, reverse circulating produced fluids and circulating
during the well kill process. As the valve is operated by annulus pressure, it is ideal for spotting nitrogen cushions
and for cycling open in gas well applications. Its high rate circulating capability (10 bbl/min) makes it operationally
efficient in high rig cost operations such as in deepwater. The high strength, debris tolerant ball sealing mechanism
has superior sealing capability for downhole shut-ins and can be opened with up to 7,500 psi (51.7 Mpa) differential
pressures, from above or below the ball. The ball can be locked open, which allows self-filling of the tubing string
while running in hole and stabbing into production packers. It also optimises the well-kill process and allows the
passage of through tubing tools below the valve, without fear of the ball closing.
Specifications:
Working Pressure and Temperature
15,000 psi / 103.42 Mpa at 350°F/177°C (Std dress)
15,000 psi / 103.42 Mpa at 450°F/232°C (HT dress)
OD
5 in / 127 mm
ID
2.25 in / 57.2 mm
Upper Thread Connection
3 1/2” IF or 3 1/2” PH6 Box
Lower Thread Connection
3 1/2” IF or 3 1/2” PH6 Pin
Tensile Strength
350,000 lbf / 155,600 daN
Approx. Tool Length
40 ft / 12.2 m
Approx. Tool Weight
1,700 lbs / 771 kg
Service Condition
H2S per NACE MR-01-75, CO2
exprogroup.com
ExACT Tool 30/07/2013 08:04 Page 2
Drill Stem Testing
Expro Annulus-Operated Circulating and Test (ExACT™) Tool
Operation:
The ExACT™ tool, pre-charged with nitrogen, is run in the hole locked open (position 1) allowing the test string to fill
from below. A self-fill tubing test valve (SF-TTV) is utilized to pressure test the string. When the DST tool string is at depth
and the packer set, hydrostatic pressure is trapped in the nitrogen reference section of the tool on the first application
of annulus pressure. The ball and circulating ports can now be operated as required by annulus pressure cycles as per
the table below. The tool will respond immediately to pressure cycles, so there is no waiting time between cycles. Also,
there is no limit to the number of tool operating cycles. On completion of the well test, trapped reference pressure is
automatically relieved whilst pulling out of hole.
Position
Functionality
1
Run in hole/Through-tubing work/
Below packer circulating/
Pull out of hole
Well flowing
2
Ball
Status
Ports
Status
Annulus
Status
(nom.) psi
Apply/Bleed
Annulus
(nom.) psi
Goto
Position
Open
Closed
0
2000
2
Open
Closed
2000
0
3
2000
4
1500/0
5
3
Well shut in
Closed
Closed
0
4
Transit position
Open
Closed
2000
0
1
5
Reverse / Circulate
Closed
Open
0
1500
6
6
Transit position
Closed
Open
1500
7
Circulate
Closed
Open
0
8
Transit position
Closed
Closed
2000
9
Transit position
Closed
Closed
0
0
7
2000
8
1000/0
5
0
9
2000
4
1500/0
5
© Expro International Group LTD
ExproAnnulus-OperatedCombinedCirculating
& Test(ExACT™)Tool 140213_v1
exprogroup.com
Drill Stem Testing
Annulus Operated Reversing Valve (AORV)
The AORV is a single shot circulating valve giving unrestricted
flow between tubing and annulus. Once open, the tool is
retained in this position by a lock ring and cannot be reclosed.
Specifications:
Working Pressure (psi/Mpa)
15,000psi/103.42 Mpa
Working Temperature (°F, °C)
350°F / 175°C
OD (in/mm)
5” / 127mm
ID (in/mm)
2.25”/57.2mm
Upper Thread connection
3 ¾” Stub Acme, 6 TPI
Lower Thread connection
3 ¾” Stub Acme, 6 TPI
Tensile Strength
350,000lbf/155,600daN
Tensile strength at Max working Pressure
30,000lbf/13,345daN
Tool Length ( in/mm)
41.4in/1052mm
Tool Weight (lbs/kg)
250 lbs/ 133 kg
Service condition
H2S per Nace MR-01-75
Operation:
The AORV is opened by applied annulus pressure, bursting a high-accuracy
rupture disc (± 2% of the disc's rupture rating). The pressure acts on an
unbalanced piston, forcing the mandrel to the open position. The mandrel is
then locked in the open position by the locking mechanism.
© Expro International Group LTD
AnnulusOperatedReversingValve 230311_v3
exprogroup.com
HTHP Retrieveable Packer 02/05/2013 09:50 Page 1
Drill Stem Testing
BigCat™ HPHT Retrievable Packer
The Expro BigCat™ HPHT packer is a premium high-strength, compression set,
retrievable hook-wall packer, ideal for Drill Stem Testing (DST), perforating and
stimulation operations. It is capable of withstanding 15,000 psi differential pressure
when set, at temperatures up to 400°F. The hydraulic hold down sub1 ensures
that the packer remains set when subjected to excessive pressure from below during stimulation operations, for example. An integral fluid bypass ensures
efficient deployment. The packer requires only a small amount of right-hand
rotation to set (one-eighth of a turn at the tool) and releases with straight pull.
This packer is available with standard or premium element sealing systems,
depending on the service requirements.
Specifications: Packer with Hold Down Sub
Working Pressure and Temperature
10,000 psi / 68.95 Mpa at 350°F/177°C (Standard dress)
15,000 psi / 103.42 Mpa at 400°F/204°C (Premium dress)
Casing Weight Range
7 in, 26 lb/ft to 7 in, 38 lb/ft
Casing ID Range
5.868 in / 149.0 mm to 6.492 in / 164.9 mm
Max. OD (Gauge Ring)
5.968 in / 151.6 mm (for 26 – 29 lb/ft casing)
5.812 in / 147.6 mm (for 32 – 35 lb/ft casing)
5.656 in / 143.7 mm (for 38 lb/ft casing)
Min. ID
2.25 in / 57.2 mm
Upper Thread Connection2
3.750 in – 6 Stub Acme Box
Lower Thread Connection3
3.750 in – 6 Stub Acme Pin
Min. Required Setting Weight4
8,000 lbf / 3,560 daN (for standard dress – 10k)
Max. Compressive Load
520,000 lbf / 231,300
Tensile Strength5
200,000 lbf / 89,000 daN
Approx. Length
13.25 ft / 4.039 m
Approx. Weight
635 lbs / 288 kg
Service Condition
H2S per NACE MR-01-75, CO2
2,500 lbf / 1,120 daN (for premium dress – 15k)
(1)
Hydraulic hold down sub, not shown in tool illustration, opposite.
(2)
Crossover to work string, as required.
(3)
Crossover to tail pipe assembly, as required.
(4)
Operationally, when run with Slip Joints, a min. net weight of 15,000 lbf should be included below the free-point.
(5)
Limited by design to allow controlled parting of the packer body mandrel.
Operation:
The packer is used in conjunction with Expro’s DST tools, and provides isolation of the formation for production or
injection purposes. As it is a compression-set packer, drill collars are incorporated in the bottomhole assembly (BHA)
to provide the necessary setting weight. The packer is deployed in the ‘safety’ position, and has an integral bypass
allowing fluid to displace from below the packer whilst running in hole. When at setting depth, the packer is set by
picking up on the string, then applying right-hand rotation to give one-eighth turn at the tool. The string is then
lowered to set the packer, also closing the bypass. The bypass can be opened by limited pick up of the string without
unsetting the packer, allowing pressure equalisation across the packer or to monitor for losses. Set down weight will
reclose the bypass. To fully unset the packer, pick up on the string; the packer will automatically move to the ‘safety’
position, which allows movement down the hole, should this be required. The packer can be reset as many times as
desired by repeating the setting process described above and ultimately retrieved from the well with the rest of BHA
on completion of in-hole operations.
exprogroup.com
© Expro International Group LTD
HP/HT Retrievable Packer 120213_v1
Drill Stem Testing
Annulus Operated Reversing Valve (AORV)
The AORV is a single shot circulating valve giving unrestricted
flow between tubing and annulus. Once open, the tool is
retained in this position by a lock ring and cannot be reclosed.
Specifications:
Working Pressure (psi/Mpa)
15,000psi/103.42 Mpa
Working Temperature (°F, °C)
350°F / 175°C
OD (in/mm)
5” / 127mm
ID (in/mm)
2.25”/57.2mm
Upper Thread connection
3 ¾” Stub Acme, 6 TPI
Lower Thread connection
3 ¾” Stub Acme, 6 TPI
Tensile Strength
350,000lbf/155,600daN
Tensile strength at Max working Pressure
30,000lbf/13,345daN
Tool Length ( in/mm)
41.4in/1052mm
Tool Weight (lbs/kg)
250 lbs/ 133 kg
Service condition
H2S per Nace MR-01-75
Operation:
The AORV is opened by applied annulus pressure, bursting a high-accuracy
rupture disc (± 2% of the disc's rupture rating). The pressure acts on an
unbalanced piston, forcing the mandrel to the open position. The mandrel is
then locked in the open position by the locking mechanism.
© Expro International Group LTD
AnnulusOperatedReversingValve 230311_v3
exprogroup.com