Engineering Inc.
Underbalance Drilling
Rotating Heads
&
Rotating BOP’s
Rotating Heads
Rotating BOP’s
Used
to divert the return flow
stream down the blooey line,
flow line or to the choke
manifold.
Rotating Drilling Heads
Two
types of systems;
hydraulic active (RBOP) and
mechanical sealing (RH)
Both are used successfully in
air and underbalanced wells
Rotating Head
Mechanical Sealing Type
TT96-90
Gas and Air Drilling
6
Rotating Head Mechanical
Sealing Mechanism
TT96-93
Drilling Fluid Description
7
Rotating BOP
Hydraulic Active
RBOPTM Kelly Packer
Closing Unit
TT96-93
Drilling Fluid Description
117
Manufacturers
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Williams
Smith Grant
Shaffer RSBOP (Varco)
Northland Inter-Tech
RBOP
TESCO1
Alpine - Technicorp
Lynn International
Others
Mechanical Seal Rotating
Heads
Pressure Ranges
 Low 300psi
 Medium 700psi
 High 1500psi
 Very High
3000psi
 Static pressure
ranges are twice
as high

Mechanical Sealing
Rotating Heads
 Kelly
Bushing
 Drive Bushing
 Swing Bolt
Clamp
 Stripper Rubber
Grant - Smith
Conventional Rotating
Head
Williams Model 9000
Kelly Driver
500 psi rotating
Bearing Assembly
1000 psi static
Up to 200 rpm
Stripper Rubber
Bowl
TT96-93
Drilling Fluid Description
Geothermal model two stripper rubbers
13
Negative Impact to Stripper
Rubber Elements
The purpose of the
stripper rubber is to
provide a seal around
the kelly as it rotates
and to seal around
the drill pipe while
tripping in or out of
the hole.
Stripper Rubber Composition
 Natural-
Air, Mist,
Foam, Gas
 Polyurethane- Oil
Based below 140 F
 Nitrile - Oil Based
above 140 F
 Butyl - Geothermal
and H2S
Negative Impact to Stripper
Rubber Elements
Kelly condition
is critical.
 Surface
conditioncheck wear
pattern on
corners
 Bent Kelly’s
Alignment
 Rig
to Stack
Alignment is
critical
 Check Daily
 Suspect to
excessive
element usage
Other Negative
Impacts
Drill pipe
identification
grooves
 Pitting and abrasion
on drill pipe
 Tong and slip die
damage
 Some hardbanding
 Mills and bits

Other Negative Impacts
 Extreme
cold
 Extreme heat
 Age
 Sun light
Low Pressure Rotating Head
TT96-90
Gas and Air Drilling
20
Medium Pressure RDH
 Pressure
to 700 psi
 Single or Dual
Element
 Lower Mounting
Spools from 7 1/16”
2000 psi to 13 5/8”5000 psi.
 Outlet Flanges are 7
1/16”-2000/3000 psi
Grant - Smith
High Pressure MODEL 7000
Williams model 7000 is also
designed to handle today’s
most demanding
underbalanced drilling
requirements.
It is available in explosion
proof and offshore models and
comes with a side outlet flange.
This unit is also equipped with a
captive space vent for purging
the system in sour gas
applications.
DUAL ROTATING STRIPPER
RUBBERS
Are designed to automatically
seal tighter as pressures
increase. The bottom rubber
wears first, leaving the top
rubber in newer condition for
added safety.
WATER COOLED
SEALS
Maximize the operating
life of the bearing
assembly.
POSITIVE OIL
LUBRICATION
provides continuous
flushing to keep debris
out of te bearings and
seals and maintains
lubrication up to
2300 psi.
HYDRAULIC
OPERATED CLAMP
Provides a continuous
closing force to
compensate for
operating stress.
For use on rigs with
top drives or Kellys
CALL FOR SIZES AVAILABLE
MODEL 7000 COMPONENTS
U.S. Patent
No.5,662,181
“Rotating Blowout
Preventer”
REMOTE MODULAR POWER UNIT
MODEL 7000 EXPLODED
CUT-AWAY VIEW
REMOTE MONITORING
CONTROL CONSOLE
MODEL 7000 ROTATING
CONTROL HEAD
Rotating Head Schematics
Single Element
Dual Element
Main Components
Hydraulic
Oiler Lubricator/ And
cooling System
Heavy Duty Rotating Drilling
Head
Bearing Assembly
Contains
large heavy duty
tapered roller bearings
Bearing Chamber sealed with
low pressure seals against
atmospheric pressure
Separate high pressure seal
assembly to contain wellbore
pressure
Drive Assembly and
Stripper Rubber
Elastomers
available for oil,
gas or geothermal drilling
Available in single or dual
element systems
Combination one piece drive
assembly and stripper rubber
KELLY DRIVERS
• Available to fit all Kelly sizes and
shapes
• Designed with vertical bolts or
snap ring
• Supplied with each complete
rotating control head
• Steel or poly inserts available
• Available for all models
MODEL 8000/9000 STRIPPER RUBBERS
• Standard
• Heavy duty
• Oil resistant
Stripper rubber usage is determined by the operating pressures, Kelly and drill
pipe conditions and stack alignment.
MODEL 9200 GEOTHERMAL STRIPPER RUBBERS
• Drill collar (1)
(1)
• Drill pipe (2)
(2)
Stripper rubber usage is determined by the operating pressures, Kelly and drill
pipe conditions and stack alignment.
7000 SERIES STRIPPER RUBBERS
Model 7100 Stripper Rubbers
• Heavy duty
Stripper rubber usage is determined by the
operating pressures, Kelly and drill pipe conditions
and stack alignment.
Model 7000 Stripper Rubbers
• Heavy duty
• Oil resistant
CASING STRIPPER RUBBERS
• Used to strip casing in the well
• Seals tight against bowl gasket using quick-lock clamp
• Assures diversion of mud and gas through
the flowline outlet
• Available for any size casing up to 13 3/8"
• Assures safety of rig personnel
Available for all models
LOGGING ADAPTER
• Makes logging faster and easier
• Seals tight against bowl gasket using quick
lock clamp
• Features 7" - 9 5/8" rounded threaded collar
to
receive logging lubricator
Available for all models
SPACER SPOOLS
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Constructed of casing and flanges
For models 8000 and 9000 series only
Permits height to be changed to desired length
Used under rotating head to raise flowline
outlet to proper height
Available in all sizes
Specify flange series and
height when ordering
TO ONLY BE
USED ABOVE
ANNULAR BOP
FLOWLINE FLANGES
• Used to connect flowline to Rotating Head
• 7 1/16" - 3000 - w / swages from 6" - 12"
• 11" - 3000 - w / swages from 6" - 12"
Available for all models
PIPE WIPER HOLDER
• Holds dual split or single
pipe wiper rubbers
• Keeps drill pipe clean
• Keeps drilling mud in the hole
• Saves mud and clean up time
• Rubber can be installed or removed
at any time
• Welds to all sizes of drilling nipples
Available for all models
OILER - LUBRICATOR
• Operates from the rig’s air supply
• Supplies constant flow of filtered oil to
bearings and seals
• Insures long life of bearings and seals
• Supplied with each complete rotating
control head
• Available for models 8000, 9000 and
9200 only
DRILLING NIPPLE
• Used to trip without bearing assembly
• Seals tight against bowl gasket using
quick-lock clamp
• Helps contain drilling mud while tripping
• Can be extended or cut to desired length
Available for all models
SNUBBING ADAPTER
• Used to nipple-up the snubbing unit
• Permits snubbing without removal of
the rotating control head bowl
• Used for models 7000,7100 and IP1000
• 7 1/16” flange connection
TEST PLUG
Used to test the drill stack
Available for all models
RBOP - Oil Tools
International
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•
TT96-93
Developed by SealTech, Oryx
Energy, Clayton Williams and Exxon
Designed for use in High GOR wells,
Wells With H2S and High Pressure
Wells.
Drilling Fluid Description
42
Wellhead Pressure Control
Active
pressure
unit
Multiple
pressure
settings
Simple quick
packer change
2000 psi static
RBOP Schematic
Wellhead Pressure Control
Quick-Change
Packer Assembly
Kelly Drive
Assembly
Inner Packer
Outer Packer
Bearing
Hydraulic Fluid Inlet
Surge
Bottle
Seal
Outlet Flange
Bottom Flange
Wellhead Pressure Control
Simple
quick packer
change
Redundant element
sealing
Multiple
pressure
settings
Rig floor
operation
RBOP Closing Unit
TT96-93
Drilling Fluid Description
117
Shaffer Rotating Blow-Out
Preventer
• 2,500 psi rotating - 5,000 psi static
Shaffer PCWD
TT96-93
Drilling Fluid Description
52
Passing a Tool Joint
Techcorp 3000
Inner Replaceable Element
TESCO DOUBLE ANNULAR
 Not
a rotating
preventer
 Uses two small
modified Shafer
packers
 Used like a
rotating
preventor
Rotating Heads
and
Rotating Blow Our Preventers
SUMMARY
Rotating Drilling Heads
Low - High Pressure Systems
Hydraulic Activated
Systems
 Not API certified as a
blowout preventer
 Sealability is
electronically
hydraulically actuated
as a function of
wellbore pressure
 Shop serviced bearing
assembly
Mechanical Interface
Systems
 Not API certified as a
blowout preventer
 Stretch-interface seal
maintained, assisted with
wellbore pressure
 Wellsite replaceable
bearing assembly
Hydraulic Lubricator Systems
Hydraulic Active
System
 Seal is hydraulically
actuated as a
function of wellbore
pressure and
lubricates the
bearing
 Usually a common oil
reservoir cools
bearing
Mechanical Interface
System
Seal is activated by well
pressure
 Circulating system for
high pressure used to
lubricate and cool
bearing -does not
activate elements
Rotating Drilling Heads
High Pressure Systems


Hydraulic Activated
Systems
Pressure to activate is
controlled by sensor
or manually.
Seal is totally
controllable.
Mechanical Interface
Systems
 Seal is always active
and increases with
increasing well
pressure.
 “No pressure” seal is
function of stretch
fit.
END