CN202360058U - Fishable oil pipe plug - Google Patents
Fishable oil pipe plug Download PDFInfo
- Publication number
- CN202360058U CN202360058U CN2011204526592U CN201120452659U CN202360058U CN 202360058 U CN202360058 U CN 202360058U CN 2011204526592 U CN2011204526592 U CN 2011204526592U CN 201120452659 U CN201120452659 U CN 201120452659U CN 202360058 U CN202360058 U CN 202360058U
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- China
- Prior art keywords
- leather cup
- axle
- joint
- slip spider
- oil pipe
- 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
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Abstract
The utility model discloses a fishable oil pipe plug which is applied to pressurized workover operations of oil fields. The fishable oil pipe plug is characterized in that a fishing shaft is penetrated from the lower end of a slip recess; two swallowtail-shaped grooves are symmetrically arranged on the outside wall of the slip recess; each swallowtail-shaped groove is internally provided with a slider slip; the upper end of a joint is in threaded connection with the lower part of the slip recess; a leather cup is sheathed on the outer wall of the lower end of the joint; the joint is connected in a central screw hole at the upper end of an upper leather cup shaft; the leather cup is fixed between the upper leather cup shaft and the joint; the upper leather cup shaft is connected in a central screw hole of a lower leather cup shaft; and another leather cup is fixed between the upper and lower leather cup shafts. The lower end of the lower leather cup shaft is in threaded connection with a paraffin scraping head; a sawtooth-shaped paraffin scraping block is arranged on the outer wall of the paraffin scraping head; and six evenly distributed through holes which are parallel to a center line are arranged at the lower end of the paraffin scraping head. The fishable oil pipe plug has the effects that channels in oil pipes can be sealed, wellhead pressure can be reduced and construction and operation under pressure can be performed, and the plug can be fished out through a steel wire, so that the initial state of a tubular column can be restored.
Description
Technical field
The utility model relates to the oil well repairing operation technical field, and particularly band is pressed workover treatment, is that the shutoff oil pipe is inner, prevents that highly pressurised liquid from going into well tool from oil pipe ejection a kind of, and this instrument can be salvaged out through steel wire.
Background technology
For guaranteeing that oil-water well is smooth, the safe construction operation, conventional method is carried out workover treatment after normally with kill-job or open flow pressure releasing method the oil-water well well head pressure being reduced again.But well killing method can pollute the stratum; The open flow pressure releasing method can discharge stratum energy, and two kinds of methods reduce well head pressure and all have drawback.At present, effective solution takes the Operating Pressure technology to carry out workover treatment exactly, and Sealing Technology is the core technology of Operating Pressure in the control oil pipe.Mainly there is the shortcoming that can't salvage in conventional tubing plug.Blanking plug is stayed and will be caused this well can't carry out step operation down in the well.
The Chinese patent publication number: 201802348, " blanking plug in the salvagable oil pipe " that provides a kind of oilfield downhole operation to use.Comprise slips, slip sleeve, cone, cartridge, lower union joint, spring, spring pressure cap, center-pole, also comprise hydraulic cylinder, piston, one way valve.Adopt the work of simple hydraulic system realization shutoff oil pipe, easy to operate, improved operating efficiency greatly; And blanking plug can also realize reclaiming repeatedly and use, and reduced operating cost.
The Chinese patent publication number: 201386525, a kind of " oil well is with dragging for the lance blanking plug " is provided, be that cover, O type O-ring seal constitute in pipe nipple, sealing cup, the support by connecting; Wherein, the upper end that connects pipe nipple is a tube connector, and this tube connector has internal thread; The lower end that connects pipe nipple is a connecting rod, and the lower end of connecting rod has external screw thread, and sealing cup closely is enclosed within on the connecting rod; Cover is plugged in the bottom of sealing cup in supporting; And be enclosed within on the connecting rod, being provided with O type O-ring seal between the sealing cup connecting rod, the center that connects pipe nipple offers through hole; Sealing cup is inserting oil pipe when inner with the utility model, under the protection of in supporting, overlapping, and the phenomenon of can not turning up; The secondary seal effect is played in the setting of O type O-ring seal; Offering of the through hole of connection pipe nipple can be realized with pressing the conventional double action of salvaging and washing top of fish.
The utility model content
The purpose of the utility model is: a kind of salvagable tubing plug is provided; Can seal the oil pipe internal channel; Cooperate well head annular space sealing device and ground control system to accomplish the sealed well mouth pressure; Carry out Operating Pressure, and can salvage well head, the solution blanking plug is stayed can't carry out the deficiency of step operation down in the oil pipe tubing string.
The technical scheme that the utility model adopts is: the salvagable tubing plug, form by salvaging axle 1, slip spider 2, slide block slips 3, joint 4, leather cup 5, last leather cup axle 6, down cup axle 7 and paraffin cutting head 8.It is characterized in that: conical slip spider 2 has central through hole, and the bottom of slip spider 2 is milled with rectangular slot, salvages axle 1 and penetrates from slip spider 2 lower ends, salvages axle 1 and can in slip spider 2 centre bores, slide.Symmetry has two swallow tail shaped slots on slip spider 2 lateral walls, and a slide block slips 3 is arranged in each swallow tail shaped slot, and the angle between swallow tail shaped slot and the center line is 6 degree; There is center screw the lower end of slip spider 2, and the upper end of joint 4 is threaded in slip spider 2 bottoms; On the outer wall of the lower end of joint 4, be with a leather cup 5; There is center screw upper end at last leather cup axle 6, and joint 4 is connected in the leather cup axle 6 upper end center screws; Leather cup 5 is fixed between leather cup axle 6 and the joint 4.On the outer wall of the lower end of last leather cup axle 6, be with another leather cup 5; There is center screw upper end at down cup axle 7, and last leather cup axle 6 is connected in down cup axle 7 center screws; Another leather cup 5 is fixed between leather cup axle 6 and the down cup axle 7; The opening of two leather cups 5 is all downward.There is center screw the upper end of paraffin cutting head 8, the lower end of the down cup axle 7 paraffin cutting head 8 that is threaded; Have zigzag to scrape wax stone on paraffin cutting head 8 outer walls, there are equally distributed six through holes parallel with center line paraffin cutting head 8 bottoms.
Sketch a kind of operating principle of salvagable tubing plug: consult Fig. 1.
The salvagable tubing plug is directly dropped in the well, rests on a certain position of tubing string after being hampered, at this moment open the oil pipe gate, dash on the liquid in the well, moment distending leather cup 5, realize the Seal Oil tube cavity.Blanking plug liquid in well makes progress and moves up under the thrust; And two slide block slips 3 do not move under frictional force effect between tooth body and the tube inner wall; At this moment move on the slip spider 2 relative slide block slips 3, because slide block slips 3 ramp effect, slide block slips 3 tube inner wall of nipping; Make move a segment distance on the blanking plug after, rest on the tube inner wall.
When salvaging tubing plug, drag under the band pressure situation and salvage axle 1, oil pipe is suppressed balance blanking plug pressure reduction up and down, and leather cup restores to the original state.On carry salvage axle 1 one segment distances after, lower step touches slide block slips 3 bottoms, impels on the slide block slips 3 relative slip spiders 2 and moves, the blanking plug deblocking proposes whole tubing plug.
Sketch a kind of method for using of salvagable tubing plug:
The pipeline of oil production of dismounting well head; Close well head control block valve (first gate on the well head four-way flange); Drop into the salvagable tubing plug from the production tree top, close gate above the production tree, guarantee that tubing plug is sealed in the production tree; Slowly open well head control block valve, tubing plug falls in the well by deadweight.
After the salvagable tubing plug puts in place and is hampered, open the oil pipe gate, dash on the liquid in the well, moment the distending leather cup, the Seal Oil tube cavity, two slide block slips are stuck on the tube inner wall, accomplish and stop up operation.
When salvaging tubing plug, well head is installed lubricator, is lowered to fishing head with steel wire, catches salvaging axle 1 a back oil pipe to beat equilibrium pressure, can pull tubing plug out.
The beneficial effect of the utility model: the utility model salvagable tubing plug; Can seal the oil pipe internal channel; Realize reducing well head pressure, be with the pressure construction operation, reduce formation contaminant, preservation stratum energy, quickening job scheduling, protection ground environment to reach.This blanking plug can drag for, and can solve blanking plug and stay all drawbacks in the tubing string.In addition, have simple in structure, low cost of manufacture.Method for using is simple, need not the professional and instructs use.Reusable through on-the-spot simple-to-maintain maintenance back.
Description of drawings
Fig. 1 is the utility model salvagable tubing plug structural representation.
Fig. 2 is the local radial sectional drawing of Fig. 1.
Fig. 3 is the local radial sectional drawing of Fig. 1.
Among the figure, 1. salvage axle, 2 slip spiders, 3. slide block slips, 4. joint, 5. leather cup is 6. gone up the leather cup axle, 7. down cup axle, 8. paraffin cutting head.
The specific embodiment
Embodiment 1: with a salvagable tubing plug that is lowered at the oil pipe of internal diameter 62mm is example, and the utility model is done further explain.Salvagable tubing plug maximum outside diameter is 56mm, and seal pressure differential is below 21MPa.
Consult Fig. 1.The salvagable tubing plug is formed by salvaging axle 1, slip spider 2, slide block slips 3, joint 4, leather cup 5, last leather cup axle 6, down cup axle 7 and paraffin cutting head 8.
Consult Fig. 1.Symmetry has two swallow tail shaped slots on slip spider 2 lateral walls, and a slide block slips 3 is arranged in each swallow tail shaped slot, and the angle between swallow tail shaped slot and the center line is 6 degree.There is center screw the lower end of slip spider 2, and the upper end of joint 4 is threaded in slip spider 2 bottoms; On the outer wall of the lower end of joint 4, be with a leather cup 5; There is center screw upper end at last leather cup axle 6, and tubular joint 4 is connected in the leather cup axle 6 upper end center screws; Leather cup 5 is fixed between leather cup axle 6 and the joint 4.On the outer wall of the lower end of last leather cup axle 6, be with another leather cup 5; There is center screw upper end at down cup axle 7, and last leather cup axle 6 is connected in down cup axle 7 center screws; Another leather cup 5 is fixed between leather cup axle 6 and the down cup axle 7; The opening of two leather cups 5 is all downward, the external diameter 56mm of two leather cups 5.There is center screw the upper end of paraffin cutting head 8, the lower end of the down cup axle 7 paraffin cutting head 8 that is threaded; There is the ring-type zigzag to scrape wax stone on paraffin cutting head 8 outer walls.Consult Fig. 3.There are equally distributed six the through holes that diameter be 6mm parallel with center line paraffin cutting head 8 bottoms.
Claims (1)
1. a salvagable tubing plug is formed by salvaging axle (1), a slip spider (2), slide block slips (3), joint (4), leather cup (5), last leather cup axle (6), down cup axle (7) and paraffin cutting head (8); It is characterized in that: conical slip spider (2) has central through hole, and the bottom of slip spider 2 is milled with rectangular slot, salvages axle (1) and penetrates from slip spider (2) lower end, salvages axle (1) and can in slip spider (2) centre bore, slide; Symmetry has two swallow tail shaped slots on slip spider (2) lateral wall, and a slide block slips (3) is arranged in each swallow tail shaped slot, and the angle between swallow tail shaped slot and the center line is 6 degree; There is center screw the lower end of slip spider (2), and the upper end of joint (4) is threaded in slip spider (2) bottom; On the lower end outer wall of joint (4), be with a leather cup (5); There is center screw upper end at last leather cup axle (6), and joint (4) is connected in the center screw of leather cup axle (6) upper end; Leather cup (5) is fixed between leather cup axle (6) and the joint (4); On the lower end outer wall of last leather cup axle (6), be with another leather cup (5); There is center screw upper end at down cup axle (7), and last leather cup axle (6) is connected in down cup axle (7) center screw; Another leather cup (5) is fixed between leather cup axle (6) and the down cup axle (7); The opening of two leather cups (5) is all downward; There is center screw the upper end of paraffin cutting head (8), the lower end of down cup axle (7) the paraffin cutting head (8) that is threaded; Have zigzag to scrape wax stone on paraffin cutting head (8) outer wall, there are equally distributed six through holes parallel with center line paraffin cutting head (8) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204526592U CN202360058U (en) | 2011-11-15 | 2011-11-15 | Fishable oil pipe plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204526592U CN202360058U (en) | 2011-11-15 | 2011-11-15 | Fishable oil pipe plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202360058U true CN202360058U (en) | 2012-08-01 |
Family
ID=46571250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204526592U Expired - Fee Related CN202360058U (en) | 2011-11-15 | 2011-11-15 | Fishable oil pipe plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202360058U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913181A (en) * | 2012-10-24 | 2013-02-06 | 中国石油化工股份有限公司 | Throwing type washable downhole pressure-bearing plugging device and plugging method thereof |
| CN105134133A (en) * | 2015-09-18 | 2015-12-09 | 中国石油化工股份有限公司 | Steel wire dropping-fishing self-balance setting packer |
| CN108086951A (en) * | 2018-01-12 | 2018-05-29 | 科莱斯（天津）电热科技有限公司 | A kind of high-pressure well mouth T cable suspension arrangements with overcurrent wing passage |
-
2011
- 2011-11-15 CN CN2011204526592U patent/CN202360058U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913181A (en) * | 2012-10-24 | 2013-02-06 | 中国石油化工股份有限公司 | Throwing type washable downhole pressure-bearing plugging device and plugging method thereof |
| CN102913181B (en) * | 2012-10-24 | 2015-04-08 | 中国石油化工股份有限公司 | Throwing type washable downhole pressure-bearing plugging device and plugging method thereof |
| CN105134133A (en) * | 2015-09-18 | 2015-12-09 | 中国石油化工股份有限公司 | Steel wire dropping-fishing self-balance setting packer |
| CN108086951A (en) * | 2018-01-12 | 2018-05-29 | 科莱斯（天津）电热科技有限公司 | A kind of high-pressure well mouth T cable suspension arrangements with overcurrent wing passage |
| CN108086951B (en) * | 2018-01-12 | 2024-04-19 | 科莱斯（天津）电热科技有限公司 | High-pressure wellhead T-cable suspension device with overcurrent side channel |
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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: 20120801 Termination date: 20121115 |