BHA COIL TUBING TOOLS.pdf

Coiled Tubing Round Table October 20, 2005 Canadian Chapter

Coil Tubing BHA Components

Presented By: Joshua W. Thompson

Regional TT Service Manager

Weatherford Canada


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


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


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.


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.


Check Valves:Check Valves:

Ball / Dart Type:

-Ball and seat provides seal.-Positive metal to metal seal.-High pressure.-ID is not passable.


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.


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.


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.


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.


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


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.


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.


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.


Hydraulic Spear:Hydraulic Spear:



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.


Hydraulic Overshot:Hydraulic Overshot:



Mechanical Fishing Tools:

- Provide a versatile option of engaging stuck fish assemblies, including wire line.

- Ability to swallow longer assemblies.- Rotary releasable.


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.


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.


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.


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.


Under reamers:Under reamers:


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.


CT Cable Heads:CT Cable Heads:Production Logs May Be Conducted.


CT Cable Heads:CT Cable Heads:

Down hole camera’s may be used:

Down hole camera’s maybe used to trouble shootwell bore problems.


Camera In Horizontal Open Hole:Camera In Horizontal Open Hole:


- 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:


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.


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.


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.


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.



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.



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.


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.

BHA COIL TUBING TOOLS.pdf

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