ServiceUnitThis document is and contains unpublished, copyrighted and confidential information of Baker Hughes, and is revealed for limited purposes only. This document is the propertyof Baker Hughes and is to be returned to Baker Hughes on request and may not be reproduced, used or disclosed to persons not having a need to know consistent with thepurpose of the document, without the written consent of Baker Hughes. This document is not rented, loaned or sold, either alone or in conjunction with equipment or product.12/16/08 Baker Hughes Incorporated.Baker Oil ToolsTHIS DOCUMENT IS FOR INTERNAL USE ONLYIntroductionThe K-1 Snap Latch Setting Tool, Product Family No. H40069, is used to mechanically set the K-1Cement Retainers, Product Family No. H40021, and K-1 Cement Retainers With Flapper Valves, ProductFamily No. H40022. With only minor modifications, the K-1 Snap Latch Setting Tool can be converted toset the N-1 Bridge Plugs, Product Family No. H40122, or converted to an NC-1 Mechanical SettingTool, Product Family No. H40066, to set NC-1 Bridge Plugs, Product Family No. H40123.The K-1 Snap Latch Setting Tool contains a built in Snap Latch feature which allows the Setting Toolto be latched into the Cement Retainers with set down weight and released with tension after setting androtationally releasing from the Retainer. This essentially allows the Setting Tool to function as a SnapLatch Stinger Sub which provides an upward stop as the tubing is raised. At this stop the valve (sleeve orflapper) is closed but the Stinger Sub Seal is still in the bore of the Retainer. The workstring can be inter-nally pressure tested in this position when setting a K-1 Cement Retainer with Sleeve Valve, ProductFamily No. H40021. Alternate means must be provided to test tubing when running the Flapper Valve Re-tainer, Product Family No. H40022. As shown in Drawing No. 175-652, the Mechanical Set Cement Re-tainer may be run in the well with the Control Valve in the open position or an Alternate Stinger Sub Bodyis available for running the valves in the closed position.K-1 Snap Latch Setting Tool and NC-1 Mechanical Setting ToolProduct Family Nos. H40069 and H40066Service Tools and Remedial Systems - Setting Tools, Stingers andWireline AccessoriesUnit No.SU 4422-2December 16, 2008Page 1 of 21Rev. AIntroduction...................................... 1Features / Benefits........................... 2Specification Guide.......................... 3Running In and Mechanical Setting........................ 4Tension Required With 90 Hard Elements .................. 4Tension Required With 70 Hard Elements .................. 4K-1 Snap Latch Setting Tool Converted For Use as a B Snap Latch Stinger Sub..................................... 5K-1 Snap Latch Setting Tool Converted To Set N-1 Mechanical Set Bridge Plug .............................. 5K-1 Snap Latch Setting Tool Converted To a Model NC-1 Mechanical Setting Tool To Set Model NC-1 Mechanical Set Bridge Plug .............................. 5Assembly..........................................6K-1 and NC-1 Mechanical Setting Tool .................6Assembly, All Sizes..........................6K-1 Cement Retainer With K-1 Snap Latch Setting Tool ..........................7Assembly, All Sizes..........................7Hydraulics .........................................8Hydraulics of Cementing Operations:For K-1 Cement Retainer ...............8How to Use Area Pressure Chart:K-1 Cement Retainer.....................9Areas (Sq. In.) For Cement Retainers Acted Upon By Tubing and Annulus Pressures .....................................10K-1 Mechanical Setting Tool Assembly and Dimensional Data .11Parts List, Sizes 1AA - 2BB............12K-1 Mechanical Setting Tool Assembly and Dimensional Data 13Dimensional Data............................ 14Parts List, Sizes 3AA - 4AA........... 15Assembly and Dimensional Data Drawing, Sizes 5AA - 11BB ......... 16Dimensional Data, Sizes 5AA - 11BB ........................ 17Parts List, Sizes 5AA - 11BB......... 18Model K-1 Setting Tool Installed in Mechanical Set Cement Retainer. 19Running and Setting Sequence For K-1 Mechanical Set Cement Retainer......................... 20Table of ContentsWARNINGUse of Baker equipment contrary to manufacturers specification may result in property damage, serious injury or fatality.Thisdocumentisandcontainsunpublished,copyrightedandconfidentialinformationofBakerHughes,andisrevealed for limited purposes only. This document is the property of Baker Hughes and is to be returned to BakerHughes on request and may not be reproduced, used or disclosed to persons not having a need to know consistentwith the purpose of the document, without the written consent of Baker Hughes. This document is not rented, loanedor sold, either alone or in conjunction with equipment or product.12/16/08 Baker Hughes Incorporated.Unit No. SU 4422-2December 16, 2008Page 2 of 21 Rev. ATHIS DOCUMENT IS FOR INTERNAL USE ONLY Features / Benefits Onetripsystem.Mechanicallysetstoolwithrotation and upstrain and functions as a stingerfor subsequent cementing operations. EasilyconvertedtoseteitherK-1CementRetainers,N-1BridgePlugs,orNC-1Bridge Plugs. Saferunin.Upperslipissecurelylockedinplace and latch is solidly threaded into the bodyof the retainer. Snap latch feature latches into the retainer withsetdown weight and is released with tension. Controls retainer valve. The stinger opens thesleeve valve with setdown weight and closes itwith upstrain. Tubingpressuretestispossiblewithlatchsleevevalveretainersbypullinguptocloseretainer valve prior to snapping out of retainer.Drawing No. 399-879Thisdocumentisandcontainsunpublished,copyrightedandconfidentialinformationofBakerHughes,andisrevealed for limited purposes only. This document is the property of Baker Hughes and is to be returned to BakerHughes on request and may not be reproduced, used or disclosed to persons not having a need to know consistentwith the purpose of the document, without the written consent of Baker Hughes. This document is not rented, loanedor sold, either alone or in conjunction with equipment or product.12/16/08 Baker Hughes Incorporated.Unit No. SU 4422-2December 16, 2008Page 3 of 21 Rev. ATHIS DOCUMENT IS FOR INTERNAL USE ONLY Specification GuideTool Tubing Setting ToolsCement Retainer SizeSeal Bore (in.)Max OD (in.)K-1 and NC-1 Product Family Nos.H40069 and H40066Setting Sleeve OD (in.)1AA1.3453.5931AA - 1BB 3.5941BB 3.9372AA 4.312 2AA 4.3122BB 4.937 2BB 4.9383AA2.0005.410 3AA5.3753BB 5.687 3BB4AA 6.312 4AA 6.3125AA 7.125 5AA 7.1256AA 8.125 6AA 8.1206BB 9.000 6BB 8.8757AA 9.437 7AA 9.4377BB 9.937 7BB 9.9308AA 10.437 8AA 10.4388BB 11.562 8BB 11.5629AA 12.000 9AA 12.00011AA 13.915 11AA 13.90011BB 14.585 11BB 14.570Thisdocumentisandcontainsunpublished,copyrightedandconfidentialinformationofBakerHughes,andisrevealed for limited purposes only. This document is the property of Baker Hughes and is to be returned to BakerHughes on request and may not be reproduced, used or disclosed to persons not having a need to know consistentwith the purpose of the document, without the written consent of Baker Hughes. This document is not rented, loanedor sold, either alone or in conjunction with equipment or product.12/16/08 Baker Hughes Incorporated.Unit No. SU 4422-2December 16, 2008Page 4 of 21 Rev. ATHIS DOCUMENT IS FOR INTERNAL USE ONLY Running In and Mechanical SettingRefer to Drawing Nos. 399-878-1 and 399-878-2.Duringrunningin,caremustbeexercisedtoprevent right-hand rotation from being transmittedto the Retainer.NOTE: As a precaution, one left-hand rotation shouldbe made every five to ten stands.CAUTIONDo not use Rotary Table or Top Drive Power toapply left-hand torque. Use only torque appliedbyhandtokeepfromstrippingtoothoffofControlNutwhichwillkeepthesettingtoolfrom functioning properly.1. After reaching setting depth, pick up two feet toprovide slack which will allow the control nut torotate freely.2. Rotatetenturnstotheright(atthetool)tothread the control nut upward and free the con-trol sleeve.3. Lower the tool back to setting depth. This ac-tion, combined with the restraining force of thedrag springs, pulls the setting sleeve from overthe upper slip assembly. The radial springs, at-tached inside the upper slip segment force theslips out against the casing. At the same timethe retaining sleeve is pulled off of the dog un-lockingthestingersubbodyfromthecontrollatch.4. TocompletethesettingoftheRetainerorBridge Plug pull at least the minimum tensionshown in the chart below. Slack off an equiva-lentamountonthetoolandreapplytension.When running a Sleeve Valve Retainer, Prod-uct Family No. H40021, the tubing may be test-edatthispointbypullingaslighttensiontoclose the sleeve valve.There may be times when junk in the hole maypreventthefullreleaseofthedogfromthestinger sub body and thereby prevent actuationof the valve. Should this occur, as indicated bytesting the tubing, alternately pick up and slackoff the tubing. This action will cam the dog outof the groove in the stinger sub body and allowfullcontrolmovement.TheSleeveValveorFlapper Valve is operated with 2" of movementat the retainer, up to close and down to open.5. To release the setting tool from the Retainer,pick up to close the valve. Holding a slight ten-sion,apply300to400ft/lb(Size1AA-3BB-One Shear Screw) or 600-800 ft/lb (Size 4AA -11BB - Two Shear Screws) of right hand torqueto the tubing or drill pipe. This will shear the ro-tational lock screws and allow the control latch,with ten additional right hand turns (at the tool),to be unscrewed from the Retainer.NOTE: If desirable, the setting tool may be releasedfrom the Retainer (with four to five right-hand turnsat the tool and 8,000 to 10,000 lbs tension). This isaccomplished by unscrewing the top portion of thethreadsonthecontrollatchandcollapsingthethreads on the lower end.Tension Required With 90 Hard ElementsSize ToolMinimum Tension (lbs)Maximum Tension (lbs)1AA - 1BB 20,000 30,0002AA - 2BB 30,000 40,0003AA - 9AA40,000 50,00011AA -11BBTension Required With 70 Hard ElementsSize ToolMinimum Tension (lbs)Maximum Tension (lbs)1AA - 3BB 20,000 30,0004AA - 9AA 30,000 45,00011AA -11BB 40,000 50,000Thisdocumentisandcontainsunpublished,copyrightedandconfidentialinformationofBakerHughes,andisrevealed for limited purposes only. This document is the property of Baker Hughes and is to be returned to BakerHughes on request and may not be reproduced, used or disclosed to persons not having a need to know consistentwith the purpose of the document, without the written consent of Baker Hughes. This document is not rented, loanedor sold, either alone or in conjunction with equipment or product.12/16/08 Baker Hughes Incorporated.Unit No. SU 4422-2December 16, 2008Page 5 of 21 Rev. ATHIS DOCUMENT IS FOR INTERNAL USE ONLY Shoulditbeadvantageoustohavealowertorque requirement to release the setting tool fromthe Retainer, the brass shear screw in the follow-ing table may be substituted for the standard an-nealed steel type rotational lock screws. The brassscrews require approximately 200 ft/lbs of torqueto shear per screw.6. After releasing from the Retainer rotationally, aset-downweightof3,000to5,000lbswillrelatch the setting tool and an 8,000 to 10,000lbs tension will unlatch. The stinger will remainsealed in Cement Retainer Seal Bore as longas the snap-out force is not exceeded.NOTE:TheCementRetainerBodyismadeofareadily drillable material. Each time the setting toolissnappedoutoftheRetainer,thesnap-inandsnap-outvalueswilldecreaseslightlyuntiltheyreach approximately 2,500 lbs (snap-in) and 5,000lbs to 6,000 lbs (snap-out). This pattern will occurwitheachRetainerrun.Controlofthevalveismaintained by setting down to open and by pickingup to close. The control distance in the Retainer is2".K-1 Snap Latch Setting Tool Converted For Use as a B Snap Latch Stinger Sub, Product Family No. H40092The K-1 Snap Latch Setting Tool functions sim-ilar to the B Snap Latch Stinger Sub. It can beconverted and used in place of the Stinger Sub anditscorrespondingcontrolunitbyreplacingtheparts listed below.1. Remove Dog, Spring, and Retaining Sleeve.2. RemovetheSettingSleeveandinstalltheThreaded Protector in its place.K-1 Snap Latch Setting Tool Converted To Set N-1 Mechanical Set Bridge Plug, Product Family No. H40122NOTE:SeePartsListandDrawingsinthisunitforconversion information.K-1 Snap Latch Setting Tool Converted To a Model NC-1 Mechanical Setting Tool, Product Family No. H40066 To Set Model NC-1 Mechanical Set Bridge Plug, Product Family No. H40123NOTE:SeePartsListandDrawingsinthisunitforconversion information.Size Annealed Steel Screw*1AA - 1BBHWW-GE1B-0HR(5/16-18 x 1/2 lg)2AA - 2BBHWW-GE1B-0MR(5/16-18 x 5/8 lg)3AA - 3BBHWW-GE1B-0SR(5/16-18 x 3/4 lg)4AAHWW-GE1B-10R(5/16-18 x 1 lg)5AAHWW-GE1B-0SR(5/16-18 x 3/4 lg)6AAHWW-GE1B-18R(5/16-18 x 1-1/4 lg)6BB - 7AAHWW-GE1B-1SR(5/16-18 x 1-3/4 lg)7BB HWW-GE1B-28R(5/16-18 x 2-1/4 lg) 8AA8BB - 9AAHWW-GE1B-1HR(5/16-18 x 1-1/2 lg)11AA - 11BHWW-GE1B-28R(5/16-18 x 2-1/4 lg)* Furnished with Cement Retainer.Size Brass Screw1AA - 1BBHWW-GE1B-0HB(5/16-18 x 1/2 lg)2AA - 2BBHWW-GE1B-0MB(5/16-18 x 5/8 lg)3AA - 3BBHWW-GE1B-0SB(5/16-18 x 3/4 lg)4AAHWW-GE1B-10B(5/16-18 x 1 lg)5AAHWW-GE1B-0SB(5/16-18 x 3/4 lg)6AAHWW-GE1B-18B(5/16-18 x 1-1/4 lg)6BB - 7AAHWW-GE1B-15B(5/16-18 x 1-3/4 lg)7BB HWW-GE1B-28B(5/16-18 x 2-1/4 lg) 8AA8BB - 9AAHWW-GE1B-1HB(5/16-18 x 1-1/2 lg)11AA - 11BHWW-GE1B-28B(5/16-18 x 2-1/4 lg)Thisdocumentisandcontainsunpublished,copyrightedandconfidentialinformationofBakerHughes,andisrevealed for limited purposes only. This document is the property of Baker Hughes and is to be returned to BakerHughes on request and may not be reproduced, used or disclosed to persons not having a need to know consistentwith the purpose of the document, without the written consent of Baker Hughes. This document is not rented, loanedor sold, either alone or in conjunction with equipment or product.12/16/08 Baker Hughes Incorporated.Unit No. SU 4422-2December 16, 2008Page 6 of 21 Rev. ATHIS DOCUMENT IS FOR INTERNAL USE ONLY AssemblyK-1 and NC-1 Mechanical Setting ToolAssembly, Sizes 1AA - 2BBRefer to Drawing Nos. 750-454-1 and 750-454-2.1. Thread Control Nut (12) (knob toward box end)on Mandrel (3) until knob on Control Nut engag-es the nut stop.2. Install O-ring (9) (when ordered only) in LowerDrag Collar (10).3. Slide Lower Drag Collar (10) over Mandrel (3)and install Truarc Retaining Ring (8) on Man-drel.4. Slide Upper Drag Collar (4) on Mandrel (3). In-stall Drag Springs (7).5. Slide Drag Ring (5) over Drag Springs (7) andinstall Hex Socket Cap Screws (6).6. Slide Retaining Sleeve (14) over Mandrel (3).7. SlideControlSleeve(11)overRetainingSleeve(14)ControlNut(12).Make-upwiththreads on Lower Drag Collar (10) by rotatingthe drag spring assembly.CAUTIONDonotrotatetheControlSleeve(11).Thiswill cause the Control Nut (12) to back off.8. Install Hex Socket Cap Screw (6) in Lower DragCollar (10).9. Make up Setting Sleeve (17) on Control Sleeve(11)andinstallbutdonottightenSetScrew(27).10.Install Dog (16), Springs (23) and Hex SocketCapScrews(15)[ControlLatchSpacer(26)andSetScrew(25)forsize2BB]onControlLatch (18) and slide over the Stinger Sub Body(19).InstallO-ring(13)onStingerSubBodyand make-up on Mandrel (3).11.Back off Control Nut (12) until the end of theRetainingSleeve(14)linesupwiththetopedgeofthegrooveintheStingerSubBody(19).DepressDog(16)ingroove.Make-upControlNutmovingRetainingSleevedownover Dog.12.Install O-ring (21) in Seal (20) and slide Seal onStinger Sub Body (19).13.Make up Stinger (22) on Stinger Sub Body (19).14.Make up Collar (2) to Mandrel (3).Assembly, Sizes 3AA - 4AARefer to Drawing Nos. 207-062-1 and 207-062-2.1. Thread Control Nut (16) (knob toward box end)on Mandrel (3) until knob on Control Nut engag-es the nut stop.2. Slide Limiter (14) on Mandrel (3).3. Slide Snap Ring (11) over Mandrel (3) and, us-ing assembly clamp, compress the Snap Ringinto the groove on the Mandrel leaving approx-imately 1/8" of the Snap Ring OD on the upperside exposed.4. Install O-ring (9) (when ordered only) in LowerDrag Collar (12).5. Slide Lower Drag Collar (12) over Mandrel (3).Grease the counter bore at the lower end of theLowerDragCollar,andpulltheDragCollaroverthecompressedSnapRing(11)untilitseats. The assembly clamp will be pushed offthe Snap Ring and may be removed.6. InstallTruarcRetainingRing(8)onMandrel(3).7. SubassembleDragSprings(7),UpperDragCollar (4) and Drag Ring (5), install Hex So CapScrews(6).SlideSubassemblyoverMandrel(3). Make up lower end of Drag Springs to Low-er Drag Collar (12). Slide Lower Drag Ring (10)over Drag Collar and Springs.8. SlideRetainingSleeve(18)insideControlSleeve (15). Slide Control Sleeve over ControlNut (16) until it bumps against Lower Drag Col-lar(12).RotateDragSpringAssemblyandmake up Control Sleeve.CAUTIONDonotrotatetheControlSleeve(15).ThiswillcausetheControlNut(16)tobackoff.When the Control Sleeve and Drag unit aremadeuptight,theLimiter(14)issecured.(There may be some stand off between theLower Drag Collar (12) and Control Sleeve.)9. Install Set Screw (13) in Control Sleeve (15).10.Make up Setting Sleeve (21) on Control Sleeve(15)andinstallbutdonottightenSetScrew(32).11.Install Dog (20), Springs (27), and Hex SocketCapScrews(19).InstallRetainingSegment(31) and Flat Head Screw (30) on Control Latch(22) and slide over the Stinger Sub Body (23).Thisdocumentisandcontainsunpublished,copyrightedandconfidentialinformationofBakerHughes,andisrevealed for limited purposes only. This document is the property of Baker Hughes and is to be returned to BakerHughes on request and may not be reproduced, used or disclosed to persons not having a need to know consistentwith the purpose of the document, without the written consent of Baker Hughes. This document is not rented, loanedor sold, either alone or in conjunction with equipment or product.12/16/08 Baker Hughes Incorporated.Unit No. SU 4422-2December 16, 2008Page 7 of 21 Rev. ATHIS DOCUMENT IS FOR INTERNAL USE ONLY InstallO-ring(17)onStingerSubBodyandmake up on Mandrel (3).12.Back off Control Nut (16) until the end of theRetainingSleeve(18)linesupwiththetopedgeofthegrooveintheStingerSubBody(23).DepressDog(20)ingroove.MakeupControlNutmovingRetainingSleevedownover Dog.13.Install O-ring (25) in Seal (24) and slide Seal onStinger Sub Body (23).14.Make up Stinger (26) on Stinger Sub Body (23).15.Make up Collar (2) to Mandrel (3).Assembly, Sizes 5AA - 11BBRefer to Drawing Nos. 207-116 and 207-116-2.1. Thread Control Nut (15) (knob toward box end)on Mandrel (3) until knob on Control Nut engag-es the nut stop.2. Slide Limiter (13) on Mandrel (3).3. Slide Snap Ring (10) over Mandrel (3) and, us-ing assembly clamp, compress the Snap Ringinto the groove on the Mandrel leaving approx-imately 1/8" of the Snap Ring OD on the upperside exposed.4. Install O-ring (9) (when ordered only) in LowerDrag Collar (11).5. Slide Lower Drag Collar (11) over Mandrel (3).Grease the counter bore at the lower end of theLowerDragCollar,andpulltheDragCollaroverthecompressedSnapRing(10)untilitseats. The assembly clamp will be pushed offthe Snap Ring and may be removed.6. InstallTruarcRetainingRing(8)onMandrel(3).7. SubassembleDragSprings(7),UpperDragCollar (4), Drag Ring (5) and install Hex SocketCap Screws (6). Slide Subassembly over Man-drel (3). Make up lower end of Drag Springs toLower Drag Collar (11). Slide Lower Drag RingoverDragCollarandSprings.InstallHexSoCap Screws.8. SlideRetainingSleeve(17)overControlNut(15).9. SlideControlSleeve(14)overRetainingSleeve (17) and make up with threads on LowerDrag Collar (11) by rotating the Drag Spring As-sembly.CAUTIONDonotrotatetheControlSleeve(14).ThiswillcausetheControlNut(15)tobackoff.When the Control Sleeve and Drag unit aremadeuptight,theLimiter(13)issecured.(There may be some stand off between theLower Drag Collar (11) and Control Sleeve.)10.Install Set Screw (12) in Control Sleeve (14).11.Make up Setting Sleeve (22) on Control Sleeve(14)andinstallbutdonottightenSetScrew(31).12.InstallDog(19),Springs(28),HexSoCapScrews(18),ControlLatchSpacer(21)andShoulder Screw (20) on Control Latch (23) andslide over the Stinger Sub Body (24). Install O-ring (16) on Stinger Sub Body and make up onMandrel (3).13.Back off Control Nut (15) until the end of theRetainingSleeve(17)linesupwiththetopedgeofthegrooveintheStingerSubBody(24).DepressDog(19)ingroove.MakeupControlNutmovingRetainingSleevedownover Dog.14.Install O-ring (26) in Seal (25) and slide Seal onStinger Sub Body (24).15.Make up Stinger (27) on Stinger Sub Body (24).K-1 Cement Retainer With K-1 Snap Latch Setting ToolAssembly, All Sizes1. Size 1AA-2BB: Slide Drag Spring Assembly upuntil stopped by Control Nut.2. Size3AAandLarger:SlideDragSpringAs-sembly down until stopped by the Snap Ring.3. RotateDragSpringAssemblyrightagainstStop.4. Slide Upper Slips over Stinger Sub Body. Loos-en clamp enough to install Slip Segments overthe ridge on the Control Latch.5. Align the Slip Segments over the ridge on theControl Latch, then tighten clamp fully.6. Lubricatenon-wickeredportionofSlipswithBaker Down Hole Grease.Thisdocumentisandcontainsunpublished,copyrightedandconfidentialinformationofBakerHughes,andisrevealed for limited purposes only. This document is the property of Baker Hughes and is to be returned to BakerHughes on request and may not be reproduced, used or disclosed to persons not having a need to know consistentwith the purpose of the document, without the written consent of Baker Hughes. This document is not rented, loanedor sold, either alone or in conjunction with equipment or product.12/16/08 Baker Hughes Incorporated.Unit No. SU 4422-2December 16, 2008Page 8 of 21 Rev. ATHIS DOCUMENT IS FOR INTERNAL USE ONLY 7. Check to see that the Drag Spring unit is stillback against the Stop.8. Size1AA-2BB:ChecktoseethattheDragSpring Unit is still up against the Control Nut.RotateSettingSleevedownoverSlipuntilsleeve bottoms out. Back off 1/2 turn.9. Size3AAandLarger:ChecktoseethattheDrag Spring unit is still down against the SnapRing. Rotate Setting Sleeve down over Slip un-til sleeve bottoms out. Back off 1/2 turn.10.Tighten Set Screws. Lubricate Stinger Seal andthreads on Control Latch, then Slide Retainerover Stinger.11.Drive Retainer over Stinger Seal, until the Re-tainer bottoms out on the Control Latch.12.Rotate Retainer to make-up onto Control Latch.(left-hand thread).13.InstallRotationalLockScrew(s)inhole(s)inControl Latch and secure.WARNINGRemoveclampfromupperslipsbeforerunning.HydraulicsHydraulics of Cementing Operations:For K-1 Cement RetainerForces created by pressures applied to the cas-ing and to the work string act on the Stinger Suband work string during cementing operations. Di-rection of these forces are governed by the size oftheStingerSub,thesize,weightperfootandlength of the tubing or drill pipe, the mud weight,the annulus pressure and the work string pressure.Annulus PressureWhenTubingOD> RetainerBore,annuluspressure tends to lift the Stinger Sub upward out oftheretainer.Thisforceisequaltotheannuluspressure (at the Cement Retainer) times the differ-ence between the area of the tubing OD and thearea of the Cement Retainer bore.WhenTubingOD< RetainerBore,annuluspressure tends to push the Stinger Sub downwardholding it in the retainer. This force is equal to theannulus pressure (at the Cement Retainer) timesthe difference between the area of the Cement Re-tainer bore and the area of the tubing OD.Tubing PressureWhen Tubing ID >Retainer Bore, tubing pres-suretendstopushtheStingerSubdownwardholding it in the retainer. This force is equal to thetubing pressure (at the Cement Retainer) times thedifference between the area of the tubing ID andthe area of the Cement Retainer Bore. Also, anypressureappliedtothetubingexertsanupwardforce on the top of the tubing string equal to thetubingpressuretimestheareaofthetubingID.This upward force reduces hook load but does notreduce the original slack off weight on the StingerSub until the hook load is reduced to zero.When Tubing ID