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Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Coil Tubing BHA Components
Presented By: Joshua W. Thompson
Regional TT Service Manager
Weatherford Canada
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
OverviewOverview
General Discussion On Coil Tubing BHA Components And Their Brief Purpose:
- Coil Connectors- Check Valves- Separation Tools- Circulation Subs- Motorhead Assembly- CT Impact Devices- Rotational Tools
- Fishing Tools- Drilling Tools- Milling Tools- Cable Heads- Isolation Tools- Pressure Control Tools- Orientation tools- Specialty Tools
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Coil Connectors:Coil Connectors:
Dimple Type: ExternalInternal
-Anti-Rotational.-Applies to sizes-Positive O-ring Seal.-CT shape is altered to engage corresponding connector profiles.-Provides a threaded connection for BHA’s
Roll On Type: Internal
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Coil Connectors:Coil Connectors:
Slip Type:
-Anti-Rotational.-Positive O-ring Seal.-Applies to all sizes of CT.-Slip is used to engage CT, -CT remains nominal in size.-May be accompanied by dimpletype. -Provides a threaded connection forBHA’s.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Check Valves:Check Valves:
Flapper Style:
-Positive O-ring Seal.-High pressure -Large passable ID.-Acts as a safety valve preventingupward flow of well bore fluids or gases into the coil tubing work string.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Check Valves:Check Valves:
Ball / Dart Type:
-Ball and seat provides seal.-Positive metal to metal seal.-High pressure.-ID is not passable.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Separation tools:Separation tools:
Mechanical Type:
- Provides the BHA a separation point, so the CT and the BHA located above the separation submay be recovered from the well.
- Tension release.- Release value adjusted by material and numberof shear screws installed.
- Alternative shear methods available.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Separation Tools:Separation Tools:
Hydraulic Types: - Flow activated release mechanism allows function without having to seat aactuation ball.
- Flow rates may be adjusted as required.
- May be accompaniedby shear screws.
- Ball activated releasemechanism requires passable ID’s locatedabove.
- Adjustable pressure asper requirement.
- Variable ball sizes.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Circulation Subs:Circulation Subs:
Single & Dual Types:
- Provides a secondary means of circulatingin the event the BHA located below the circ.sub becomes obstructed or may be functionedto shut off flow to other BHA components.
- May or may not be ball activated.- Pressure adjustable. - Burst disc used for safety purposes.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Motorhead Assembly:Motorhead Assembly:
Motorhead assemblies incorporate the previous listed BHA components into on complete tool serving four purposes.
-Coil Connector.
-Dual Flapper Check Valve.
-Hydraulic Disconnect.
-Dual Circulation Sub.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Coil Tubing BHA Impact Devices:Coil Tubing BHA Impact Devices:
Dual Acting Hydraulic Jarring Systems:- Jarring systems are commonly used to dislodgewell bore obstructions.
- Intensifiers used in conjunction with jars to maximize forces applied to fish.
- Functioned by reciprocating the CT work string.- Requires tension and compression loads downhole.
- Delivers both upward and downward impacts.- Passable ID’s- No flow required
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Coil Tubing BHA Impact Devices:Coil Tubing BHA Impact Devices:
Impact Hammer Systems:- Impact hammers provide an alternative method of impacting lodged well bore obstructions.
- CT work string does not require reciprocation.- Flow is required. - Impacts are delivered at a high frequency, producing a “jack hammer” effect.
- ID’s are not passable.- Lower tension and compression loads requiredto function.
- Both upward and downward acting.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
BHA Rotational Tools:BHA Rotational Tools:
Kick Off & Index Type:
- Provides the CT BHA the ability to rotate in order to orientate through various well profiles or assist in engaging fishing tools.
-Actuated by compression weight. - Resistance required, a shoulder such as a liner topor an overshot onto a fish.
- May or may not counter rotate when resetting. - From 120 – 1080 deg rotation.- Clockwise or counter clockwise available.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Fishing Tools:Fishing Tools:
Hydraulic Spears:
- Spears provide the versatility of retrievingvarious types of well bore obstructions by engaging the ID.
- May be designed for specific profiles such assliding sleeves, plugs, disconnects, etc.
- Can be used to engage slick ID’s.- Hydraulic releasable. - Pressure adjustable. - Hydrostatically balanced.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Hydraulic Spear:Hydraulic Spear:
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Fishing Tools:Fishing Tools:
Hydraulic Overshot:- Overshot's, much like the spear provide theability to retrieve well bore obstructions byengaging the OD.
- May be design for specific profiles such aswire line fish necks, prongs, plugs etc.
- May be used to engage slick OD’s.- Hydraulic releasable.- Pressure adjustable.- Hydrostatically balanced. - Short or standard catch range.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Hydraulic Overshot:Hydraulic Overshot:
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Fishing Tools:Fishing Tools:
Mechanical Fishing Tools:
- Provide a versatile option of engaging stuck fish assemblies, including wire line.
- Ability to swallow longer assemblies.- Rotary releasable.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
CT Drilling Motors:CT Drilling Motors:
Positive displacement Type:
- Provides bit rotation by convertingflow and pressure to mechanical rotationand torque.
- Fluid driven. - Sealed or open bearing sections.- Various power section configurations.
- Various speeds, output torques & lengths.
- Elastomer used in the stators.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
CT Drilling Motors:CT Drilling Motors:
Vain type: - No elastomer used in the power section.- May be driven with gases or harsh fluids.- May be operated in high temperature environments.
-Various performance optionsavailable.
- Generally shorter in length.- Sealed bearing assembly.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Milling Tools:Milling Tools:
- Milling and drilling tools provide the cutting edge that is required to remove well bore obstructions, manage unwanted debris or drill geographical formations.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Specialty Milling Tools:
Under reamers:
- Under reamers allow a small ID to be passed thru and larger ID to be milled or drilled
. below.- Hydraulically functioned. - May be operated in conjunction with PDM’s.- Opening parameters may be adjusted. - No need to remove production tubing in order . to service the casing or open hole section . . . .. below the tubing bottom.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Under reamers:Under reamers:
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
CT Cable Heads:CT Cable Heads:
E-Line Coil Tubing:
-Provides a means of connecting the E-linelocated inside the coil tubing to a usable electronic connection while mechanically connecting to the coil tubing and servingthe four purposes of the motorhead assembly.- Coil connector.- Dual flapper check valve.- Hydraulic disconnect.- Circulation sub.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
CT Cable Heads:CT Cable Heads:Production Logs May Be Conducted.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
CT Cable Heads:CT Cable Heads:
Down hole camera’s may be used:
Down hole camera’s maybe used to trouble shootwell bore problems.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Camera In Horizontal Open Hole:Camera In Horizontal Open Hole:
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
- Isolation packers may be deployed and functioned via. Coil tubing.
- May be set in casings or tubing. - Mechanical or hydraulic setting mechanisms.- Various pressure ratings.- May be operated with out killing the well.
Isolation packers:
Well bore Isolation:Well bore Isolation:
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Well bore Isolation:Well bore Isolation:
Bottom InflatableJet Packer
Upper InflatableJet Packer
Ball LockGuide Nose
InjectionSub
Selective packers:
- Provides the ability to select wherestimulation fluids or gases are
. placed in thewell bore.
- May be used for water shut off, . . .. leak testing injection testing. - May be released and reset.- Inflatable designs available.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Pressure Control Tools:Pressure Control Tools:
Unloaders, Sequence & Safety Valves
- Provides the ability to preset or control BHA components by pressure, flow orstring tension / compression.
- May be used as a safety component. - May be used to increase BHA flow rateto assist in well clean up.
- May control flow rate delivered to the . .. BHA.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
CT Directional Tools:CT Directional Tools:
Hydraulic steering:
- Provides the ability to control the drilling BHA’s direction down hole.
- May be functioned hydraulically or electronicallyfrom surface.
- Operated in conjunction with directional measuring instruments.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Specialty Tools:Specialty Tools:
BHA Pulsating:
ValvePDM Power Section
-The CT BHA is oscillated by a pulse generatedby the tool. The pulse prevents the onset of helical lock up of the work string.
- Enhanced weight transfer to the drilling BHA.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Specialty Tools:Specialty Tools:
Lateral Leg Entry Tools- Provides the abilityto locate and entermulti-lateral legs in a well to perform CTwork over operations.
-Hydraulically functioned.
- May be pressureindications when lateral leg is entered.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Specialty Tools:Specialty Tools:
CT Well Bore Departure Systems- CT set whip stocks provide a safe methodto exit the well bore &begin directional drilling operations.
- Slim hole configurations.- May exit through both
tubing and casing. - CT Retrievable.- Various sizes available.
Coiled Tubing Round Table October 20, 2005 Canadian Chapter
Coil Tubing BHA Components:Coil Tubing BHA Components:
Please contact a CT BHA technical specialist for further technical information on Coil Tubing BHA components.
Thank you for your attention,
Please forward any questions at this time.