CN101798911B - Underwater wellhead reclaiming tool - Google Patents
Underwater wellhead reclaiming tool Download PDFInfo
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- CN101798911B CN101798911B CN2010101333422A CN201010133342A CN101798911B CN 101798911 B CN101798911 B CN 101798911B CN 2010101333422 A CN2010101333422 A CN 2010101333422A CN 201010133342 A CN201010133342 A CN 201010133342A CN 101798911 B CN101798911 B CN 101798911B
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- supporting seat
- rotary shell
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Abstract
The invention provides an underwater wellhead reclaiming tool, which is used for cutting and reclaiming an underwater wellhead of an abandoned marine well. The tool mainly comprises a support seat, a lock arm, a pin shaft, a lock arm spring, a support cover, a support tube and a rotating-lifting assembly, wherein the rotating-lifting assembly comprises a rotating shell, a guide cap, a thrust bearing, a spring assembly and a mandrel. The support seat is arranged behind the wellhead; the mandrel drives the rotating-lifting assembly to complete rotating and lifting functions; the lock arm locks the wellhead, so that the mandrel rotates to work in a pulled state; and after the work is finished, the mandrel drives the rotating-lifting assembly to rotate and lift and the lock arm is separated from the wellhead under the assistance of the lock arm spring, so that the separation and reclaim of the wellhead are realized. The underwater wellhead reclaiming tool has the characteristic that the underwater wellhead reclaiming tool is compact in structure, visible in working state, and safe and reliable, and completely meets requirements of marine underwater wellhead reclaiming work.
Description
Technical field
The present invention relates to the offshore oil drilling technical field.It specifically is exactly a kind of underwater wellhead recovery special tool that the drilling at the sea abandoned well is used that is suitable for.
Background technology
In the offshore oil exploration and exploitation process, after the completion prospect pit probing, need test and analyze whether can be converted into producing well.If judge to be converted into producing well, this well will be abandoned.In the abandoned well process, need to cut the underwater well head head system open from the following certain depth of mud line, and reclaim top well head head, in order to avoid more than mud line, leave hidden danger.Thereby need a kind of special well head head to cut the recovery instrument.What traditional abandoned well method adopted is that the press-down type abandoned well reclaims instrument; Promptly adopt rotary body directly to be seated on the upper surface of well head head; And under the state that the well head head is applied downward pressure rotary drill column, drill string drives the cutting tool of lower end and accomplishes the cutting to sleeve pipe.Along with the increase of the depth of water, the shortcoming that this traditional press-down type abandoned well reclaims instrument comes out gradually.As: because the well head head is in pressured state, drill string radially wobbles when rotated easily, causes cutting unstable, and operating efficiency is low, causes the drilling rod accident that fractures to take place when serious.
Summary of the invention
The objective of the invention is: a kind of underwater wellhead reclaiming tool that the drilling at the sea abandoned well is used that is suitable for is provided, can docks with the well head head; When drill string rotating cutting sleeve pipe, can apply the well head head through locking arm and lift power; After sleeve pipe is cut off, can realize that the safety of underwater wellhead reclaims, and compact conformation, handling safety, easy.
The technical scheme that the present invention adopts is: underwater wellhead reclaiming tool mainly is made up of supporting seat, locking arm, bearing pin, locking arm spring, supporting cover, stay pipe and rotary pulling assembly.
The rotary pulling assembly is made up of rotary shell, guiding cap, thrust bearing, compression spring and axle.Wherein, axle is a hollow cylindrical, and there is internal thread the axle upper end, and there is external screw thread the lower end; An annular shoulder is arranged on the axle outer wall, and the shoulder soffit has to go up mediates boss.
Rotary shell is cylindric, in the stepped central hole is arranged; Rotary shell top is enclosed within on the axle outer wall, and the bottom is enclosed within on the outer wall of axle shoulder; Compression spring and thrust bearing are arranged in the annular space between axle and rotary shell, and the compression spring is enclosed within on the outer wall of axle with thrust bearing, and compresses spring on the axle shoulder between plane and the thrust bearing.
Vertically be evenly distributed with three protruding keys on the outer wall of rotary shell, three groups of annular grooves and vertical slot on three protruding keys and the supporting seat inwall cooperate.
The rotary shell upper end is evenly distributed with three grooves, and three grooves are locking arm release grooves; The rotary shell upper end is evenly distributed with three convexities, and three convexities are positioning steps, and the quick, safe of oral recovery instrument and well head head of realizing going into the well freed.
The guiding cap of cone shape is enclosed within on the outer wall of axle, and guiding cap is relative with the rotary shell lower surface with the rotary shell upper surface, and guiding cap is bolted to the rotary shell lower end through leading cap.Kneading boss under the bar shaped is being arranged on the guiding cap upper surface, and the following kneading boss of guiding cap is mediated boss with going up of axle shoulder soffit and is cooperated.After last kneading boss and following kneading boss were mediated, axle ability driven rotary housing and guiding cap rotated together; When last kneading boss with after following kneading boss separates, axle can be rotated separately.
Supporting seat is that concentric bilayer is cylindric, and inner layer cylinder is enclosed within on the outer wall of rotary shell, and the inner layer cylinder top is evenly distributed with three grooves, i.e. three locking arm mounting grooves.The locking arm pin-and-hole relative respectively with three grooves arranged on plane on the outer cylinder.The step-like annular groove and the vertical slot of UNICOM are with it arranged on the inwall of inner layer cylinder, and totally three groups of annular groove and vertical slots are circumferentially and evenly distribute.
Locking arm is 90 degree twisted plates, and locking arm has cross wall and perpendicular wall, and there is the raised step that matches with well head head outer wall annular groove the perpendicular inboard, wall lower end of locking arm, and step can hang on the well head head outer wall annular groove.There is pin-and-hole the inboard corner of locking arm.Three bearing pins pass three the locking arm pin-and-holes and the inboard pin-and-hole of locking arm of supporting seat respectively, and locking arm is connected on the supporting seat, and locking arm can be swung along bearing pin, and the lower end step of locking arm can hang on the well head head outer wall annular groove or break away from well head head outer wall annular groove.There is the spring holddown groove on the plane on the locking arm cross wall end.The locking arm spring is arranged in the spring holddown groove.
Supporting cover is the discoid centre bore that has, and supporting cover is enclosed within on the axle, and the lower plane of supporting cover is pressed on the last plane of supporting seat, and through screw supporting cover is fixed on the last plane of supporting seat.Three locking arms and locking arm spring are pressed in the supporting cover bottom, stop that locking arm moves up.
In order to strengthen the intensity of supporting cover, the supporting cover upper side has gusset; Be lined with stay pipe between the plane on supporting cover lower plane and the supporting seat urceolus, bolt passes supporting cover fixing hole and stay pipe and is fixed on the supporting seat in the screw of plane, supporting cover is fixed on the top of supporting seat.
There are 45 degree scalene cones the inboard, lower end of the outer cylinder of supporting seat.
The external diameter of supporting seat inner layer cylinder is identical with well head head inner diameter; The internal diameter of the outer cylinder of supporting seat is identical with well head head outer diameter.
The operating principle of underwater wellhead reclaiming tool: consult Fig. 1.
Termination drill string on the rotary pulling assembly axle 1, following termination centralizer and cutting tool.When transferring, the protruding key 23 on rotary shell 6 outer walls is positioned at supporting base inwall annular groove 18, and end in contact on protruding key 23 upper ends and the annular groove 18 is hanging the recovery instrument and transferring, and at this moment, locking arm 4 is positioned at locking arm release groove 20, under the effect of locking arm spring 3, opens.Transfer and put in place, when supporting base is located well head head 9, slowly transfer the rotary pulling assembly, annular groove 18 lower ends are touched in protruding key 23 lower ends, and locking arm 4 breaks away from locking arm release grooves 20.Up time is slowly rotated the rotary pulling assembly, and protruding key 23 is run into annular groove 18 steps, on carry the rotary pulling assembly, rotary shell 6 upper surfaces and locking arm 4 inner contacts, locking arm 4 rotates and 9 interlocks of well head head.It is total to continue up time rotation rotary pulling, and protruding key 23 gets into annular grooves 18 upper step, and the interlock of locking arm 4 and well head head 9 is by locked.On worry axle 1, the boss 21 of go up mediating of axle 1 lower end breaks away from following kneading boss 7 on the guiding cap 8, axle 1 is the up time rotation under tension state, gets into duty.When changing cutter etc. recovery instrument and well head head 9 are freed, at first transfer axle 1, in the effect lower spindle 1 and rotary shell 6 interlocks of compression spring 11; Inverse time mandrel 1 then, locking arm 4 contacts with positioning step 24, and this moment, locking arm 4 positions and locking arm release groove 20 aligned; Locking arm 4 rotates down in locking arm spring 3 effect, lower end and well head disengaging, on worry spool 1; End in contact on protruding key 23 and the annular groove 18 drives recovery and moves tool up.
The invention is characterized in:
1, adopted external hanging type locking arm 4 structures, the visual locking that has realized recovery instrument and well head head 9 with free;
2, rotary shell 6 is cylindric, and outer wall has equally distributed three protruding keys 23, cooperates with three groups of annular grooves on supporting seat 10 inwalls 18 and vertical slot 17, realizes the interlock and the locking of well head head recovery instrument and well head head 9.
3, rotary shell 6 tops are provided with locking arm release groove 20 and positioning step 24, realize that quick, the safety of well head head recovery instrument and well head head 9 is freed;
4, be provided with the convex that matches on rotary pulling assembly axle 1 and the guiding cap 8, under the effect of compression spring 11, realization axle 1 rotation is separately rotated two kinds of conversion of operation state with axle 1 driven rotary housing 6.
Beneficial effect of the present invention: underwater wellhead reclaiming tool; Can be suitable for the drilling at the sea abandoned well reclaims with underwater wellhead; Realized the drill string rotating specialty of well head head under tension state; Reduce radially wobbling under the drill string operating status, improved the stability and the operating efficiency of cutting operation, can realize safe, the quick recovery of underwater wellhead.
Description of drawings
Fig. 1 is a underwater wellhead reclaiming tool structural profile sketch map of the present invention;
Fig. 2 is the supporting seat generalized section;
Fig. 3 is a rotary pulling assembly generalized section.
Figure number: 1-axle, 2-supporting cover, 3-locking arm spring, 4-locking arm, 5-bearing pin, 6-rotary shell; Kneading boss under the 7-, the 8-guiding cap, 9-well head head, the 10-supporting seat, 11-compresses spring, 12-thrust bearing; The 13-stay pipe, 14-bolt, 15-screw, 16-locking arm mounting groove, 17-vertical slot, 18-annular groove 19-pin-and-hole; 20-locking arm release groove, the last kneading of 21-boss, 22-leads the cap bolt, the protruding key of 23-, 24-positioning step.
The specific embodiment
" underwater wellhead reclaiming tool of well head head 9 (internal diameter is 473 millimeters) is an example, in conjunction with accompanying drawing, the present invention is done further explain to be applicable to 18-3/4 with one.
Consult Fig. 1.Underwater wellhead reclaiming tool of the present invention mainly is made up of supporting seat 10, locking arm 4, bearing pin 5, locking arm spring 3, supporting cover 2, stay pipe 13 and rotary pulling assembly.
Consult Fig. 2.The rotary pulling assembly is made up of rotary shell 6, guiding cap 8, thrust bearing 12, compression spring 11 and axle 1.Wherein, axle 1 is a hollow cylindrical, and axle 1 external diameter is 203.2 millimeters.There is the drilling tool internal thread axle 1 upper end, and there is the drilling tool external screw thread lower end.An annular shoulder is arranged on axle 1 outer wall, and the thickness of annular shoulder is 48 millimeters.Annular shoulder soffit has four to go up kneading boss 21.The height of last kneading boss 21 is 10 millimeters, and width is 10 millimeters.
The three groups of annular grooves 18 that vertically are evenly distributed with on the outer wall of rotary shell 6 on 23, three protruding keys 23 of three protruding keys and supporting seat 10 inwalls cooperate with vertical slot 17.(narration how to cooperate is partly arranged in operating principle)
The guiding cap 8 of cone shape is enclosed within on the outer wall of axle 1, and the tapering of cone is 45 °.Guiding cap 8 is relative with rotary shell 6 lower surfaces with rotary shell 6 upper surfaces, and guiding cap 8 is led cap bolt 22 through five and is fixed on rotary shell 6 lower ends.Kneading boss 7 under four bar shapeds is being arranged on guiding cap 8 upper surfaces, and the following kneading boss 7 of guiding cap 8 is mediated boss 21 with going up of axle 1 shoulder soffit and is cooperated.
Consult Fig. 2.Supporting seat 10 is that concentric bilayer is cylindric, and inner layer cylinder is enclosed within on the outer wall of rotary shell 6, and it is 120 millimeters groove that the inner layer cylinder top is evenly distributed with three width, i.e. three locking arm mounting grooves 16.The locking arm pin-and-hole 19 relative respectively with three grooves arranged on plane on the outer cylinder.The step-like annular groove 18 and the vertical slot 17 of UNICOM are with it arranged on the inwall of inner layer cylinder, and annular groove 18 and totally three groups of vertical slots 17 are circumferentially and evenly distribute.The external diameter of supporting seat 10 inner layer cylinders is identical with well head head 9 inner diameters; The internal diameter of supporting seat 10 outer cylinders is identical with well head head 9 outer diameters.
Consult Fig. 1.Locking arm 4 is 90 degree twisted plates, and locking arm 4 has cross wall and perpendicular wall, and the thickness of locking arm 4 is 118 millimeters.There is the raised step that matches with well head head 9 outer wall annular grooves locking arm 4 perpendicular inboards, wall lower end, and step can hang on the well head head 9 outer wall annular grooves.There is a pin-and-hole 19 locking arm 4 inboard corners.Three bearing pins 5 pass three locking arm pin-and-holes 19 and locking arm 4 inboard pin-and-holes 19 of supporting seat 10 respectively; Locking arm 4 is connected on the supporting seat 10; Locking arm 4 can be along bearing pin 5 swings, and the lower end step of locking arm 4 can hang on the well head head 9 outer wall annular grooves or break away from well head head 9 outer wall annular grooves.There is the spring holddown groove on the plane on the locking arm 4 cross wall ends.Locking arm spring 3 is arranged in the spring holddown groove.Locking arm spring 3 is compression springs.
Supporting cover 2 is the discoid centre bore that has, and supporting cover 2 centre bores are enclosed within on the axle 1, and the lower plane of supporting cover 2 is pressed on the last plane of supporting seat 10, and through three bolts 14 and three screws 15 supporting cover 2 is fixed on the last plane of supporting seat 10.Three locking arms 4 are pressed in supporting cover 2 bottoms with locking arm spring 3, stop that locking arm 4 moves up.
Supporting cover 2 upper side have six gussets; Be lined with three stay pipes 13 between the plane on supporting cover 2 lower planes and supporting seat 10 urceolus, bolt 14 passes supporting cover 2 fixing holes and stay pipe 13 and is fixed on the supporting seat 10 in the screw of plane, supporting cover 2 is fixed on the top of supporting seat 10.There is one 45 degree scalene cone the inboard, lower end of supporting seat 10 outer cylinders.
Claims (1)
1. a underwater wellhead reclaiming tool mainly is made up of supporting seat (10), locking arm (4), bearing pin (5), locking arm spring (3), supporting cover (2), stay pipe (13) and rotary pulling assembly;
The rotary pulling assembly is made up of rotary shell (6), guiding cap (8), thrust bearing (12), compression spring (11) and axle (1); Wherein, axle (1) is a hollow cylindrical, and there is internal thread axle (1) upper end, and there is external screw thread the lower end; On axle (1) outer wall, an annular shoulder is arranged, the shoulder soffit has to go up mediates boss (21);
Rotary shell (6) is cylindric, in the stepped central hole is arranged; Rotary shell (6) top is enclosed within on axle (1) outer wall, and the bottom is enclosed within on the outer wall of axle (1) shoulder; Compression spring (11) and thrust bearing (12) are arranged in the annular space between axle (1) and rotary shell (6); Compression spring (11) and thrust bearing (12) are enclosed within on the outer wall of axle (1), and compress spring (11) on axle (1) shoulder between plane and the thrust bearing (12);
Vertically be evenly distributed with three protruding keys (23) on the outer wall of rotary shell (6), three protruding keys (23) cooperate with three groups of annular grooves (18) and vertical slot (17) on supporting seat (10) inwall;
Rotary shell (6) upper end is evenly distributed with three grooves, and three grooves are locking arm release groove (20); Rotary shell (6) upper end is evenly distributed with three convexities, and three convexities are positioning step (24);
The guiding cap of cone shape (8) is enclosed within on the outer wall of axle (1); And guiding cap (8) is relative with rotary shell (6) lower surface with rotary shell (6) upper surface; Guiding cap (8) is fixed on rotary shell (6) lower end through leading cap bolt (22); Kneading boss (7) under the bar shaped is arranged on guiding cap (8) upper surface, and the following kneading boss (7) of guiding cap (8) is mediated boss (21) with going up of axle (1) shoulder soffit and is cooperated;
Supporting seat (10) is that concentric bilayer is cylindric, and inner layer cylinder is enclosed within on the outer wall of rotary shell (6), and the inner layer cylinder top is evenly distributed with three grooves, i.e. three locking arm mounting grooves (16); On plane on the outer cylinder, have and locking arm pin-and-holes that three grooves are relative respectively, step-like annular groove (18) and the vertical slot of UNICOM (17) are with it arranged on the inwall of inner layer cylinder, totally three groups of annular groove (18) and vertical slots (17) are circumferentially even distribution;
Locking arm (4) is 90 degree twisted plates; Locking arm (4) has cross wall and perpendicular wall; There is the raised step that matches with well head head (9) outer wall annular groove the perpendicular inboard, wall lower end of locking arm (4), and step can hang on well head head (9) the outer wall annular groove, and there is pin-and-hole the inboard corner of locking arm (4); Three bearing pins (5) pass three the locking arm pin-and-holes and the inboard pin-and-hole of locking arm (4) of supporting seat (10) respectively; Locking arm (4) is connected on the supporting seat (10), and locking arm (4) can be along bearing pin (5) swing, and the lower end step of locking arm (4) can hang on well head head (9) the outer wall annular groove or break away from well head head (9) outer wall annular groove; There is the spring holddown groove on the plane on locking arm (4) the cross wall end, and locking arm spring (3) is arranged in the spring holddown groove;
Supporting cover (2) is the discoid centre bore that has, and supporting cover (2) is enclosed within on the axle (1), and the lower plane of supporting cover (2) is pressed on the last plane of supporting seat (10), and supporting cover (2) is fixed on the last plane of supporting seat (10) through screw (15); Three locking arms (4) and locking arm spring (3) are crushed on supporting cover (2) bottom;
Supporting cover (2) upper side has gusset; Between the last plane of supporting cover (2) lower plane and supporting seat (10) urceolus, be lined with stay pipe (13); Bolt (14) passes supporting cover (2) fixing hole and stay pipe (13) is fixed in the screw of the last plane of supporting seat (10), supporting cover (2) is fixed on the top of supporting seat (10);
There are 45 degree scalene cones the inboard, lower end of the outer cylinder of supporting seat (10);
The external diameter of supporting seat (10) inner layer cylinder is identical with well head head (9) inner diameter; The internal diameter of the outer cylinder of supporting seat (10) is identical with well head head (9) outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101333422A CN101798911B (en) | 2010-03-10 | 2010-03-10 | Underwater wellhead reclaiming tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101333422A CN101798911B (en) | 2010-03-10 | 2010-03-10 | Underwater wellhead reclaiming tool |
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| Publication Number | Publication Date |
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| CN101798911A CN101798911A (en) | 2010-08-11 |
| CN101798911B true CN101798911B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101333422A Active CN101798911B (en) | 2010-03-10 | 2010-03-10 | Underwater wellhead reclaiming tool |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877807A (en) * | 2012-10-25 | 2013-01-16 | 中国石油大学(华东) | High-pressure well head temporary guide base lowering tool for floating drilling system |
| CN105253764B (en) * | 2015-09-28 | 2017-03-01 | 宝鸡石油机械有限责任公司 | Lock block type fast lockign apparatus under water |
| CN105781465A (en) * | 2016-01-26 | 2016-07-20 | 中国海洋石油总公司 | Rotary type cutting and fishing integral fisher |
| CN109944563B (en) * | 2019-05-06 | 2023-11-14 | 长江大学 | Cutting and recycling tool for deep water sleeve |
| CN110159200B (en) * | 2019-05-21 | 2021-05-18 | 中海石油(中国)有限公司深圳分公司 | Drilling device and marine drilling positioning device thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550811A (en) * | 2009-05-08 | 2009-10-07 | 深圳远东石油工具有限公司 | Lifting full water depth outer suspension clutch unlock underwater well head cutting recovery combined tool |
| CN201620794U (en) * | 2010-03-10 | 2010-11-03 | 中国石油天然气集团公司 | Underwater well mouth head recovery tool |
-
2010
- 2010-03-10 CN CN2010101333422A patent/CN101798911B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550811A (en) * | 2009-05-08 | 2009-10-07 | 深圳远东石油工具有限公司 | Lifting full water depth outer suspension clutch unlock underwater well head cutting recovery combined tool |
| CN201620794U (en) * | 2010-03-10 | 2010-11-03 | 中国石油天然气集团公司 | Underwater well mouth head recovery tool |
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| CN101798911A (en) | 2010-08-11 |
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