CN201103373Y - Oil pipe plugging device for oil-gas field - Google Patents
Oil pipe plugging device for oil-gas field Download PDFInfo
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- CN201103373Y CN201103373Y CNU2007201739374U CN200720173937U CN201103373Y CN 201103373 Y CN201103373 Y CN 201103373Y CN U2007201739374 U CNU2007201739374 U CN U2007201739374U CN 200720173937 U CN200720173937 U CN 200720173937U CN 201103373 Y CN201103373 Y CN 201103373Y
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Abstract
The utility model relates to a tubing plug used in oil and gas fields and is applicable to the oil (water) well repair operation. The utility model is characterized in that: a bar cap is inserted into a central hole at the upper end of an upper body. The lower end of the upper body is connected with a lower body through a thread. The lower body is provided with a packing group on the external wall. The wall of the upper body is provided with a vertical channel that internally is fixed with a locking piece through a steel pin. A double twist spring is arranged between the internal wall of the locking piece and the external wall of the rod cap. The wall of the upper body is provided with bypass holes and the wall of the lower body is provided with holes. A cone block and a closing ring with a cone internal surface are arranged between the core shaft and the lower body. On the external wall of the core shaft, a shear pin is adopted for fixing a shield ring. The wall of the core shaft is provided with transverse through holes; the position on the upper part of the core shaft where the transverse through hole is located is corresponding to the bypass hole of the upper body and the part on the lower part of the core shaft where the transverse through hole is located is corresponding to the hole of the lower body. The external wall of the core shaft is provided with an O-shaped ring. The lower end of the lower body is provided with a pipe plug. The oil pipe blanking plug has the advantages of resistance to 35MPa pressure difference, safety and reliability, and high success rate for dismantling oil pipes in no-killing operations.
Description
Technical field
The utility model relates to petroleum production engineering well workover technology field, oil field, the special-purpose calker of the oil pipe that uses during particularly a kind of oil (water) well place under repair operation.
Background technology
Oil well repairing operation adopts the well killing fluid kill-job often, and oil reservoir is polluted, and has influenced reservoir recovery.For reducing pollution, when maintenance high-pressure oil gas well, adopt Operating Pressure usually to oil reservoir.Not kill-job, open flow, keep not playing lower tubular column under the former borehole pressure situation.Must at first stop up oil pipe before removing oil pipe, it is excessive from well head to prevent that highly pressurised liquids such as crude oil, water from entering in the oil pipe.A kind of special tool that tubing plug comes to this.After tubing plug was lowered to oil pipe, the oil discharge passage in the temporary close oil pipe can keep in repair wellhead equipment, and can allow workover rig well site away from keyboard carry out the operation of other oil well; By oil pipe is pressurizeed and pressure release, can test oil pipe, the pressurization that also can be used for the fluid power packer sets etc.At present the general bearing capacity of tubing plug that uses is low, generally can only bear 20MPa, causes in the work progress success rate not high.
The Chinese patent notification number is CN2564746Y, and a kind of anti-blocking throttling blanking plug is provided; Notification number is CN2595996Y, and a kind of tubing plug is provided.Its structure has adopted can drag for joint and be connected successively with connected body, support body, de-sludging cutter, one way valve is arranged in connected body and can drag for joint and be connected.Can realize stop up in the tubing string optional position, be applied to high-pressure oil gas well maintenance Operating Pressure scene after, improved the success rate of a shutoff, greatly reduce working strength of workers and cost, reduced oil layer pollution, improve oil recovery factor.
Summary of the invention
The purpose of this utility model is: a kind of oil gas field tubing plug is provided, can it be put in the landing nipple in tubing string precalculated position by the wire Launching and Bailing operation, oil pipe is carried out shutoff, withstand voltage difference reaches 35MPa, and it is safe and reliable, can be used for snubbing serving and remove oil pipe, also can be used in other constructions that need stop up oil pipe and use.Overcome the low and not high problem of construction success rate of existing tubing plug pressure-bearing.
The technical scheme that the utility model is taked is: oil gas field with tubing plug mainly by pole cap, upper body, lock dog, mandrel, awl piece, locating snap ring, packing group, cut off, lower body and plug form.It is characterized in that: pole cap inserts in the centre bore of upper end, upper body, and the lower end of pole cap adopts the copper pin to connect the mandrel upper end.Mandrel has central through hole.The lower end of the upper body lower body that is threaded.The packing group is arranged on the outer wall of lower body, and the lower end of upper body is pressed in the upper end of packing group.Vertical groove is arranged on the last body wall, vertically be fixed with flat lock dog by steel pin in the groove.Between lock dog inwall and pole cap outer wall torsion spring is arranged, torsion spring can promote lock dog and rotate along steel pin.On the last body wall by-pass prot is arranged, porose on the following body wall, liquid can pass through from by-pass prot in the well.It is the locating snap ring of taper seat that inner surface is arranged between mandrel and lower body.The awl piece is arranged in the taper seat of locating snap ring.Flexible circle between locating snap ring and the awl piece.At locating snap ring and the top of boring piece catch is arranged, stop that the awl piece upwards slides.On the outer wall of mandrel, be with back-up ring, adopt to cut off back-up ring is fixed on the mandrel outer wall.On the mandrel wall cross through hole is arranged, the position of mandrel upper lateral through hole is relative with the by-pass prot of upper body, and the position of mandrel lower, transverse through hole is relative with the hole of lower body.On the outer wall of mandrel, round section joint ring is arranged.Lower end at lower body is connected with plug.
In order to improve sealing performance, described packing group is made up of pressure ring, " V " type packing and Supporting ring, in the middle of " V " type packing Supporting ring is arranged, and there is locating snap ring at the two ends of " V " type packing.Seal group has guaranteed that with the seal section of landing nipple blanking plug can bear the pressure of 35MPa in working order down, thereby and the seal group protection that is arranged in upper body and lower body avoid effectively under the duty black box being produced infringement.
The position of described round section joint ring is in the bottom of mandrel lower, transverse through hole; Round section joint ring is divided into two groups up and down, after mandrel upwards slides, seals the hole of lower body respectively.
Mandrel and lower body are all porose, and when blanking plug was knocked down landing nipple, water can advance from orifice flow, flow out from top, thereby make oil gas field realize that with pressure balance on the tubing plug it knocks down smoothly.
Oil gas field is knocked down with tubing plug has unique locking mechanism after landing nipple enters duty (sealing up whole oil pipe passages), locating snap ring stops mandrel up by baffle ring, the awl piece guarantees that mandrel is no longer descending after up, thereby has realized the effective sealing to the oil pipe passage.
The beneficial effects of the utility model are: oil gas field is used with tubing plug and special tool landing nipple, and landing nipple and oil pipe connect together, and is lowered into the position that needs obstruction in advance.When needs stop up oil pipe, put in the landing nipple by steel wire operation, work to stop up the oil pipe passage, after hours, oil gas field is pulled out with tubing plug with the instrument of pulling out by steel wire operation and can be realized that the oil pipe passage is unimpeded, finish the operation of a tubing plug.
Oil gas field reaches 35MPa with the withstand voltage difference of tubing plug, and is safe and reliable, can be used for snubbing serving and remove oil pipe, the success rate height.
Description of drawings
Accompanying drawing is the utility model: oil gas field tubing plug structural profile schematic diagram (bypass open mode).
Among the figure, 1. pole cap, 2. upper body, 3. copper pin, 4. lock dog, 5. torsion spring, 6. steel pin, 7. mandrel, 8. catch, 9. awl piece, 10. elastic ring, 11. locating snap rings, 12. pressure ring, 13. " V " shape packing, 14. support rings, 15. back-up rings, 16. cut off 17. round section joint rings, 18. lower bodies, 19. plugs, 20. the hole, 21. through holes, 22. by-pass prots.
The specific embodiment
Embodiment 1: consult accompanying drawing, be elaborated with tubing plug with the oil gas field of a KPT-56.
29 millimeters of pole cap 1 lower end diameter.Pole cap 1 inserts in the centre bore of 2 upper ends, upper body, and the lower end of pole cap 1 adopts copper pin 3 to connect mandrel 7 upper ends.Mandrel 7 has central through hole, 19 millimeters of the external diameters of mandrel 7; 6.5 millimeters of internal diameters; 277 millimeters of length.The lower end of upper body 2 lower body 18 that is threaded.The packing group is arranged on the outer wall of lower body 18, and the lower end of upper body 2 is pressed in the upper end of packing group.The packing group is made up of pressure ring 12, " V " type packing 13 and Supporting ring 14, in the middle of " V " type packing 13 Supporting ring 14 is arranged, and there is locating snap ring 11 at the two ends of " V " type packing 13.
Have the vertical groove in 4 roads on 2 walls of upper body, vertically be fixed with flat 4 lock dogs 4 respectively by steel pin 6 in the groove.Between lock dog 4 inwalls and pole cap 1 outer wall torsion spring 5 is arranged, torsion spring 5 can promote lock dog 4 and rotate along steel pin 6.
On 2 walls of upper body by-pass prot 22 is arranged, porose 20 on lower body 18 walls, liquid can pass through from by-pass prot 22, hole 20 in the well.
It is the locating snap ring 11 of taper seat that inner surface is arranged between mandrel 7 and lower body 18.Awl piece 9 is arranged in the taper seat of locating snap ring 11.The elastic ring 10 that has an oil resistant glue to make between locating snap ring 11 and the awl piece 9.At locating snap ring 11 and the top of boring piece 9 catch 8 is arranged.
On the outer wall of mandrel 7, be with back-up ring 15, adopt up and down two groups to cut off 16 back-up ring 15 is fixed on mandrel 7 outer walls.
2 cross through hole 21 are arranged, 5 millimeters of the diameters of through hole 21 on mandrel 7 walls.The position of the cross through hole 21 on mandrel 7 tops is relative with the by-pass prot 22 of upper body 2, and the position of the cross through hole 21 of mandrel 7 bottoms is relative with the hole 20 of lower body 18.The quantity in the hole 20 of lower body 18 is 4,5 millimeters of diameters.
4 road round section joint rings 17 are arranged on the outer wall of mandrel 7.The position of round section joint ring 17 is in the bottom of mandrel 7 lower, transverse through holes 21; 4 road round section joint rings 17 are divided into two groups up and down, and the distance of two groups of round section joint rings 17 is 40.2 millimeters.
Be connected with plug 19 in the lower end of lower body 18.
The construction operation step of the utility model oil gas field with tubing plug used in summary:
Drop at the scene and pull out and need to use steel wire operation in the operation process.
1, landing nipple and oil pipe are connected together is lowered into the precalculated position, for being lowered to of blanking plug provides a fastening devices; When needs carry out the blanking plug operation, carry out operation according to the following steps;
2, blanking plug is assembled, but moving mandrel 7 is in the by-pass prot open position, guarantees the unimpeded of by-pass prot, so that knock down smoothly.Then blanking plug and delivery instrument are connected together with other aid (rope socket, weighted lever, bumper jar), prepare to go into the well.Adorn three 5mm copper pins 3 on the delivery instrument, below two, above one;
3, with winch wire tool string is shipped in the landing nipple, owing to there is by-pass prot to knock down smoothly, can directly be seated in after putting in place, on carry and can judge whether imprisonment, if be seated in not in place can hitting down at a slow speed; After blanking plug is locked in the landing nipple, upwards jarring, it is disconnected to deliver the one group of copper pin shake in instrument top and bottom, on carry the delivery instrument, move to the by-pass prot fastening position but moving mandrel is being with, more upwards jarring, copper pin shake above the delivery instrument is disconnected, take out delivery instrument and above instrument; At this moment the blanking plug inside and outside has all sealed up, and blanking plug is started working (being in sealing state), and it can bear the pressure of upper and lower both direction;
When 4, pulling blanking plug out, be lowered to the fishing tool string with winch wire, comprise fishing tool, rope socket, weighted lever, the bumper jar of not being with probe, catch fishing head on the pole cap with bailer grab on the fishing tool, upwards jarring, it is disconnected to cut off 16 shakes with two on the baffle ring 15, but moving mandrel 7 is pulled out, makes that downforce reaches balance on the blanking plug; Be lowered to the fishing tool of band probe again, the fishing tool, rope socket, weighted lever, the bumper jar that comprise the band probe, probe flattens the lock dog 4 of blanking plug, make lock dog 4 no longer withstand on the step of landing nipple, therefore the remaining part of blanking plug all can be pulled out, be finished the blanking plug operation process thus No. one time.
Claims (3)
1. oil gas field tubing plug, mainly by pole cap (1), upper body (2), lock dog (4), mandrel (7), awl piece (9), locating snap ring (11), the packing group, cut off (16), lower body (18) and plug (19) are formed, it is characterized in that: pole cap (1) inserts in the centre bore of upper end, upper body (2), the lower end of pole cap (1) adopts copper pin (3) to connect mandrel (7) upper end, mandrel (7) has central through hole, the lower end of upper body (2) lower body (18) that is threaded, the packing group is arranged on the outer wall of lower body (18), the lower end of upper body (2) is pressed in the upper end of packing group, on the wall of upper body (2) vertical groove is arranged, vertically be fixed with flat lock dog (4) by steel pin (6) in the groove, between lock dog (4) inwall and pole cap (1) outer wall, torsion spring (5) is arranged, on the wall of upper body (2) by-pass prot (22) is arranged, on lower body (8) wall porose (20), it is the locating snap ring (11) of taper seat that inner surface is arranged between mandrel (7) and lower body (18), awl piece (9) is arranged in the taper seat of locating snap ring (11), flexible circle (10) between locating snap ring (11) and the awl piece (9), at locating snap ring (11) and the top of boring piece (9) catch (8) is arranged, stop that awl piece (9) upwards slides, on the outer wall of mandrel (7), be with back-up ring (15), employing cuts off (16) back-up ring (15) is fixed on mandrel (7) outer wall, on mandrel (7) wall cross through hole (21) is arranged, the position of mandrel (7) upper lateral through hole (21) is relative with the by-pass prot (22) of upper body (2), the position of mandrel (7) lower, transverse through hole (21) is relative with the hole (20) of lower body (18), round section joint ring (17) is arranged on the outer wall of mandrel (7), be connected with plug (19) in the lower end of lower body (18).
2. oil gas field tubing plug according to claim 1, it is characterized in that: described packing group is made up of pressure ring (12), " V " type packing (13) and Supporting ring (14), in the middle of " V " type packing (13) support ring (14) is arranged, there is locating snap ring (11) at the two ends of " V " type packing (13).
3. oil gas field tubing plug according to claim 1 and 2 is characterized in that: the position of described round section joint ring (17) is in the bottom of mandrel (7) lower, transverse through hole (21); Round section joint ring (17) is divided into two groups up and down, after mandrel (7) upwards slides, seals the hole (20) of lower body (18) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201739374U CN201103373Y (en) | 2007-11-01 | 2007-11-01 | Oil pipe plugging device for oil-gas field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201739374U CN201103373Y (en) | 2007-11-01 | 2007-11-01 | Oil pipe plugging device for oil-gas field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201103373Y true CN201103373Y (en) | 2008-08-20 |
Family
ID=39950398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201739374U Expired - Fee Related CN201103373Y (en) | 2007-11-01 | 2007-11-01 | Oil pipe plugging device for oil-gas field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201103373Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966322A (en) * | 2012-12-17 | 2013-03-13 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for dropping and fishing tubing plug |
| CN105545221A (en) * | 2016-03-04 | 2016-05-04 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Shale gas well no-killing production tubular column capable of being lifted up and put down under no pressure and construction method |
-
2007
- 2007-11-01 CN CNU2007201739374U patent/CN201103373Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966322A (en) * | 2012-12-17 | 2013-03-13 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for dropping and fishing tubing plug |
| CN105545221A (en) * | 2016-03-04 | 2016-05-04 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Shale gas well no-killing production tubular column capable of being lifted up and put down under no pressure and construction method |
| CN105545221B (en) * | 2016-03-04 | 2017-11-24 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of shale gas well no killing well is not with pressure to remove flow string and construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20111101 |