CN201810237U - Workover fluid underground positive and negative circulation conversion device - Google Patents

Workover fluid underground positive and negative circulation conversion device Download PDF

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Publication number
CN201810237U
CN201810237U CN2010205493021U CN201020549302U CN201810237U CN 201810237 U CN201810237 U CN 201810237U CN 2010205493021 U CN2010205493021 U CN 2010205493021U CN 201020549302 U CN201020549302 U CN 201020549302U CN 201810237 U CN201810237 U CN 201810237U
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CN
China
Prior art keywords
positive
central tube
workover fluid
skeleton
cup
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010205493021U
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Chinese (zh)
Inventor
马世俊
游兴友
周向群
王云利
张清华
张林朋
李业峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Sinopec Shengli Oilfield Co Xianhe Oil Production Plant
Original Assignee
China Petroleum and Chemical Corp
Sinopec Shengli Oilfield Co Xianhe Oil Production Plant
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Petroleum and Chemical Corp, Sinopec Shengli Oilfield Co Xianhe Oil Production Plant filed Critical China Petroleum and Chemical Corp
Priority to CN2010205493021U priority Critical patent/CN201810237U/en
Application granted granted Critical
Publication of CN201810237U publication Critical patent/CN201810237U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a workover fluid underground positive and negative circulation conversion device which is used for workover treatment in the petroleum industry and is used when a kelly bar is needed for driving and repairing wells, so that workover fluid is ensure to be subject to positive and negative circulation under a well, and the circulation conversion device is convenient to construct and is used for improving the operation efficiency. The circulation conversion device comprises a bidirectional runner central tube, an upper packing leather seal assembly, a stabilizing standstill locking mechanism and a lower packing leather seal assembly, wherein the upper packing leather seal assembly, the stabilizing standstill locking mechanism and the lower packing leather seal assembly are successively connected and are installed outside the bidirectional runner central tube. The sealing of the kelly bar on a well mouth is converted into circulated sealing in an underground shaft, and a positive and negative circulation mode is provided for the workover fluid. By the utility model, the problems of positive and negative circulation sealing, poor positive circulation carrying capability and large possibility of jamming of a drilling tool when the kelly bar drives during the underground operation in the present oil field are solved. After the circulation conversion device is used, a rotary self-sealing device is not used, thus improving the working efficiency and the operation safety, protecting the well field environment, and lowering the labor intensity of workers.

Description

The positive and negative cycle conversion device in workover fluid down-hole
Technical field
The utility model relates to the workover treatment technology and equipment of petroleum industry, and particularly the positive and negative cycle conversion device in workover fluid down-hole uses when the needs kelly bar drives well workover, makes workover fluid finish positive and negative circulation in the down-hole, and convenient construction improves operating efficiency.
Background technology
Workover fluid circulation when downhole oil well overhaul kelly bar in oil field drives operation, there is not good well mouth sealing device, adopt direct circulation mostly, promptly pump into from kelly bar, straight-through down-hole is returned to well head from drilling rod and casing annulus again, the direct circulation kick is strong, carrying capacity is poor, is unfavorable for returning on the bulky grains such as down-hole chip or sand grains, causes lock of tool drilling easily.Especially when kelly bar actuating sleeve milling major diameter instrument, need to set up anti-circulation, avoid bulky grains such as direct circulation down-hole chip or sand grains to cause lock of tool drilling.Owing to there is not the anti-circulation of good well mouth sealing device foundation very difficult, all be to adopt direct circulation.If adopt kelly bar rotation self-packer to set up anti-circulation, the rotatory sealing effect is extremely undesirable, and kelly bar rotation self-sealing rubber core interference fit seal does not have axial auxiliary seal, and the well head sealing is extremely unreliable.Simultaneously, switch the rotation self-packer and need dismantle the well head connecting bolt back and forth, switch extremely inconvenience of installation.Rotation self-packer volume is big and heavy, the cost height, and effect is relatively poor, and The field is not extensive.The scene needs a kind of when kelly bar drives the milling of major diameter instrument cover, for workover fluid is set up reverse circulating technology and device.
Summary of the invention
The purpose of this utility model provides the positive and negative cycle conversion device in workover fluid down-hole, and the cyclic transformation of the workover fluid when being used for oilfield downhole operation kelly bar driving well workover makes the backwash circulation convenient feasible.Cause the problem of lock of tool drilling when solution party's drilling rod sealing difficulty and direct circulation easily.
The purpose of this utility model is achieved in that
The positive and negative cycle conversion device in workover fluid down-hole comprises the reversible passage central tube, goes up the leather cup seal assembly, sets upright rotation preventive mechanism and down cup seal assembly, to go up the leather cup seal assembly, set upright rotation preventive mechanism and be connected successively, be installed in the outside of reversible passage central tube with the down cup seal assembly.Kelly bar is converted into circulation sealing in the pit shaft of down-hole in the sealing of well head, and provides positive and negative endless form for workover fluid.
The utility model compared with prior art has following obvious improvement: the ground endless form when using the utility model the oilfield downhole operation kelly bar can be driven is transferred to the down-hole, ground direct circulation mode can be converted into the anti-endless form in the pit shaft, be very easy to field operation.Just reverse circulating sealing problem and direct circulation carrying capacity difference and cause the problem of lock of tool drilling easily when having solved present oilfield downhole operation kelly bar and driving.Do not re-use the rotation self-packer after using this device, reduced and switched the troublesome operation that well head rotation self-packer is installed, accelerated the operation timeliness, improved processing safety, protected the well site environment, reduced working strength of workers.This device reasonable idea, simple in structure, simple operation, it is with low cost to rotate self-packer relatively, has remarkable economic efficiency and social benefit.
Description of drawings
Fig. 1 is a front view of the present utility model.
Fig. 2 is that the utility model A-A is to sectional view.
Fig. 3 is that the utility model B-B is to sectional view.
Fig. 4 is a fundamental diagram of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described.Use drilling tool to pump into workover fluid, enter casing annulus or pump into workover fluid to go out from the drilling tool internal return, allow workover fluid finish the conversion of positive and negative circulation in the down-hole by the utility model from casing annulus by the utility model to the down-hole.Referring to Fig. 1, the positive and negative cycle conversion device in workover fluid down-hole comprises reversible passage central tube 2, goes up the leather cup seal assembly, sets upright rotation preventive mechanism and down cup seal assembly, to go up the leather cup seal assembly, set upright rotation preventive mechanism and be connected successively, be installed in the outside of reversible passage central tube 2 with the down cup seal assembly.Reversible passage central tube 2 two ends cylindricals are provided with connecting thread and are connected with lower contact 10 with top connection 1 respectively; Its tube chamber center is provided with axially spaced-apart, forms positive runner 15 and anti-runner 17, is just exporting 18 with anti-outlet 16 of the just change at tube chamber two ends and contravariant respectively and is connecting.The axially spaced-apart of reversible passage central tube 2 respectively to the opposite side extension of positive runner 15 and anti-runner 17, forms the runner mouth at the tube chamber two ends.The rotation direction of reversible passage central tube 2 two ends cylindrical connecting threads is identical with the rotation direction of drilling tool screw thread, and its middle part cylindrical is provided with limited step and needle roller is installed annular groove.Last leather cup seal assembly comprises leather cup 3 and upper skeleton 4, and circle is provided with shoulder in the upper skeleton 4, and shoulder becomes one with top and 3 sulfurations of last leather cup, and the shoulder bottom is provided with internal thread, and the rotation direction of this internal thread is identical with the drilling tool screw thread; Be provided with seal 14 between upper skeleton 4 and the reversible passage central tube 2.The down cup seal assembly comprises down cup 9 and lower skeleton 8, and circle is provided with shoulder in the lower skeleton 8, and shoulder becomes one with lower part and down cup 9 sulfurations, and shoulder top is provided with internal thread, and the rotation direction of this internal thread is opposite with the drilling tool screw thread; Be provided with seal 11 between lower skeleton 8 and the reversible passage central tube 2; The rim of a bowl of down cup 9 is towards opposite with last leather cup 3, respectively towards the two ends of reversible passage central tube 2.Referring to Fig. 2, to set upright rotation preventive mechanism and comprise friction block 5, spring leaf 6, spline sleeve 7 and needle roller 12 and 13, the cylindrical of spline sleeve 7 is provided with mounting groove, and built-in spring sheet 6 and friction block 5, spring leaf 6 place between friction block 5 and the bottom land; Needle roller 12 and 13 places the needle roller of spline sleeve 7 and reversible passage central tube 2 to install between the annular groove.Spline sleeve 7 can make upper and lower cup packing assembly not rotate like this, for the positive and negative circulation canal of workover fluid forms good sealing, can guarantee reversible passage central tube 2 again when rotating at a high speed, and upper and lower leather cup 3 and 9 is injury-free.The extrados of friction block 5 is provided with straight shape card tooth, mounting spring sheet 6 in the spring groove of its lower surface; Spline sleeve 7 two ends are provided with screw thread and are connected with lower skeleton 8 with upper skeleton 4 respectively, and the two ends of friction block 5 are contained by upper skeleton 4 and lower skeleton 8, friction block 5 solid and reliable.Just becoming anti-outlet 16 and contravariant and just exporting 18 and be separately positioned on down cup 9 on the reversible passage central tube 2 and the rim of a bowl place of last leather cup 3, just becoming anti-outlet 16 and contravariant just exporting 18 towards respectively with the rim of a bowl of down cup 9 and last leather cup 3 towards consistent and contained by the rim of a bowl; Anti-outlet 16 of just change on the reversible passage central tube 2 and contravariant are just exporting 18 an outlet are being set in the body circumference of place respectively at least, Figure 3 shows that 3 outlets, when considering body intensity, more help the current of workover fluid.
The workover treatment drilling tool is lowered to the above 30-50 rice in pit shaft precalculated position, when needing the work of circulation workover fluid, connects drilling rod in the well by lower contact 10, and top connection 1 connects column or single drilling rod or kelly bar and is lowered in the pit shaft, pumps into workover fluid or cement paste by kelly bar.Workover fluid or cement paste through positive runner 15, just become anti-outlet 16 and enter casing annulus, promptly become anti-circulation and enter the drilling tool bottom by direct circulation, shown in arrow among Fig. 4, flow to.Workover fluid carries cover milling chip and sand grains etc. and returns in the drilling tool, is just exporting 18 casing annuluss that enter this device top through anti-runner 17, contravariant, becomes direct circulation by anti-circulation to return out well head, flows to shown in arrow among Fig. 4.When kelly bar drove rotation and implements the cover milling operation, reversible passage central tube 2 rotated synchronously, transfer torque be connected carrying.Set upright rotation preventive mechanism and rely on frictionally spline between friction block 5 and the sleeve pipe, spline sleeve 7 related upper and lower sealing cup assembly splines, prevent that upper and lower leather cup 3 and 9 is worn when reversible passage central tube 2 rotates at a high speed, ensure the sealing reliability of leather cup and increase the service life.

Claims (9)

1. the positive and negative cycle conversion device in workover fluid down-hole, it is characterized in that this device comprises reversible passage central tube (2), goes up the leather cup seal assembly, sets upright rotation preventive mechanism and down cup seal assembly, to go up the leather cup seal assembly, set upright rotation preventive mechanism and be connected successively, be installed in the outside of reversible passage central tube (2) with the down cup seal assembly.
2. the positive and negative cycle conversion device in workover fluid according to claim 1 down-hole, it is characterized in that reversible passage central tube (2) tube chamber center is provided with axially spaced-apart, form positive runner (15) and anti-runner (17), anti-outlet of just change (16) and the contravariant with the tube chamber two ends just exports (18) perforation respectively; The axially spaced-apart of reversible passage central tube (2) respectively to the opposite side extension of positive runner (15) and anti-runner (17), forms the runner mouth at the tube chamber two ends.
3. the positive and negative cycle conversion device in workover fluid according to claim 1 and 2 down-hole is characterized in that the rotation direction of reversible passage central tube (2) two ends cylindrical connecting thread is identical with the rotation direction of drilling tool screw thread, is connected with lower contact (10) with top connection (1) respectively; Its middle part cylindrical is provided with limited step and needle roller is installed annular groove.
4. the positive and negative cycle conversion device in workover fluid according to claim 3 down-hole is characterized in that anti-outlet of just change (16) on the reversible passage central tube (2) and contravariant just export (18) outlet is set respectively at least in the body circumference of place.
5. the positive and negative cycle conversion device in workover fluid according to claim 1 down-hole, it is characterized in that the leather cup seal assembly comprises leather cup (3) and upper skeleton (4), circle is provided with shoulder in the upper skeleton (4), shoulder becomes one with top and last leather cup (3) sulfuration, the shoulder bottom is provided with internal thread, and the rotation direction of this internal thread is identical with the drilling tool screw thread; Be provided with seal (14) between upper skeleton (4) and the reversible passage central tube (2).
6. the positive and negative cycle conversion device in workover fluid according to claim 1 down-hole, it is characterized in that the down cup seal assembly comprises down cup (9) and lower skeleton (8), circle is provided with shoulder in the lower skeleton (8), shoulder becomes one with lower part and down cup (9) sulfuration, shoulder top is provided with internal thread, and the rotation direction of this internal thread is opposite with the drilling tool screw thread; Be provided with seal (11) between lower skeleton (8) and the reversible passage central tube (2); The rim of a bowl of down cup (9) is towards opposite with last leather cup (3), respectively towards the two ends of reversible passage central tube (2).
7. the positive and negative cycle conversion device in workover fluid according to claim 1 down-hole, it is characterized in that setting upright rotation preventive mechanism and comprise friction block (5), spring leaf (6), spline sleeve (7) and needle roller (12) and (13), the cylindrical of spline sleeve (7) is provided with mounting groove, built-in spring sheet (6) and friction block (5), spring leaf (6) place between friction block (5) and the bottom land; Needle roller (12) and (13) place the needle roller of spline sleeve (7) and reversible passage central tube (2) to install between the annular groove.
8. the positive and negative cycle conversion device in workover fluid according to claim 7 down-hole is characterized in that the extrados of friction block (5) is provided with straight shape card tooth, mounting spring sheet (6) in the spring groove of its lower surface; Spline sleeve (7) two ends are provided with screw thread and are connected with lower skeleton (8) with upper skeleton (4) respectively, and the two ends of friction block (5) are contained by upper skeleton (4) and lower skeleton (8).
9. the positive and negative cycle conversion device in workover fluid according to claim 4 down-hole, it is characterized in that describedly just becoming anti-outlet (16) and contravariant and just exporting (18) and be separately positioned on down cup (9) on the reversible passage central tube (2) and the rim of a bowl place of last leather cup (3), just becoming anti-outlet (16) just export with contravariant (18) towards respectively with the rim of a bowl of down cup (9) and last leather cup (3) towards consistent and contained by the rim of a bowl.
CN2010205493021U 2010-09-26 2010-09-26 Workover fluid underground positive and negative circulation conversion device Expired - Fee Related CN201810237U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205493021U CN201810237U (en) 2010-09-26 2010-09-26 Workover fluid underground positive and negative circulation conversion device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205493021U CN201810237U (en) 2010-09-26 2010-09-26 Workover fluid underground positive and negative circulation conversion device

Publications (1)

Publication Number Publication Date
CN201810237U true CN201810237U (en) 2011-04-27

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Application Number Title Priority Date Filing Date
CN2010205493021U Expired - Fee Related CN201810237U (en) 2010-09-26 2010-09-26 Workover fluid underground positive and negative circulation conversion device

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102979459A (en) * 2012-12-03 2013-03-20 中国石油大学(华东) High-density particle-containing fluid control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102979459A (en) * 2012-12-03 2013-03-20 中国石油大学(华东) High-density particle-containing fluid control device
CN102979459B (en) * 2012-12-03 2015-03-18 中国石油大学(华东) High-density particle-containing fluid control device

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110427

Termination date: 20130926