CN2419369Y - Oil pipe plug - Google Patents
Oil pipe plug Download PDFInfo
- Publication number
- CN2419369Y CN2419369Y CN 99253285 CN99253285U CN2419369Y CN 2419369 Y CN2419369 Y CN 2419369Y CN 99253285 CN99253285 CN 99253285 CN 99253285 U CN99253285 U CN 99253285U CN 2419369 Y CN2419369 Y CN 2419369Y
- Authority
- CN
- China
- Prior art keywords
- plug
- utility
- model
- mandrel
- spacing
- 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 - Lifetime
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- Fishing Rods (AREA)
Abstract
The utility model relates to an oil pipe blocking device for oil fields. The utility model is characterized in that a spacing and releasing device of the utility model is composed of spacing sleeve, a releasing sleeve, a core shaft, a positioning pin, a spring, a spacing ring and an end plug. The utility model has no need of salvaging tools to salvage when the utility model is relieved with blockage. Through the forward pressurization, the shapes of the core shaft and the working barrel are utilized to affect the split claws of the releasing sleeve to let go and collect, and then the utility model dashes out of the fuel pipe. The utility model has the advantages of simple and reliable work and work cost reduction.
Description
The utility model relates to a kind of oil field tubing plug.
Put in the operation of oil pipe in the oil field, spray from oil pipe for preventing downhole oil, gas, water, adopted a lot of blowout prevention procedures and method, tubing plug is exactly class methods wherein.Tubing plug commonly used is because its structure is that cam (boss) is spacing, when needing to take out, must be lowered to the wire rope fishing tool with hit down or on the method carried with carrying or transfer on the tubing plug gag lever post cam (boss) is regained, discharging the back proposes, its weak point is: wax deposition, fouling cause pipe aperture to diminish in oil pipe, or tubing deformation and be used for inclined shaft and during horizontal well, do not go under the fishing tool; Lift or under hit when discharging tubing plug, owing to the influence of reasons such as pressure, silt particle, corrosion causes the tubing plug distortion and lost efficacy, and fishing tool on carry or under to hit power limited, make tubing plug to propose; If liquid is discontented in the oil pipe, when salvaging with wire rope, the impact force that presses down also may make wire rope beat and turn round, twines, and causes the accident.
The purpose of this utility model provides a kind of tubing plug, and it can need not propose oil pipe with it by fishing tool after operation finishes, and only relying on down-hole pressure to discharge can propose.
The utility model is made up of seating nipple, lower contact, plug and fishing head, spacing and the releasing device that it is characterized in that tubing plug is made up of stop collar, release cover, mandrel, alignment pin, spring, spacing ring and plug, the mandrel upper end is threaded with gland, the lower end is on plug, sealing ring is arranged on the plug, and stop collar is fixed together by shear pin and mandrel, discharges cover and is threaded with stop collar, spacing ring, alignment pin is inserted in the pin-and-hole of mandrel middle part boss, and spring is arranged in the pin-and-hole.
Aforesaid tubing plug is characterized in that discharging the position limiting structure that puts for dividing a claw, divides protruding spacing on the claw core axle.
Aforesaid tubing plug is characterized in that also overlapping according to this on the fishing head and protects bowl and leather cup, and leather cup is pressed closer by the gland that is threaded with fishing head.
Advantage of the present utility model is to discharge tubing plug by down-hole pressure, and operation is simple, reliable.Reduced operating cost.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation that discharges cover on Fig. 1.
Elaborate below in conjunction with drawings and Examples.
The utility model is made up of three parts, and the one, seating nipple 7 and lower contact 16, they are connected with upper and lower tubing round thread respectively, connect back tubing plug and tubing string and become one.The 2nd, the main body of tubing plug, it is spacing and release portion, form by stop collar 5, release cover 8, mandrel 10, alignment pin 11, spring 12, spacing ring 13 and plug 14, mandrel 10 upper ends are threaded with gland 4, and there is sealing ring 15 lower end on the plug 14 on plug 14, stop collar 5 is fixed together by shear pin 6 and mandrel 10, discharge cover 8 and be threaded with stop collar 5, spacing ring 13, alignment pin 11 is inserted in the pin-and-hole of mandrel 10 middle part boss, and spring 12 is arranged in the pin-and-hole.The 3rd, go out (or pulling out) part, mainly by fishing head 1, protect bowl 2 and leather cup 3 is formed, protect bowls 2 and leather cup 3 be inserted in fishing head 1 according to this, gland 4 is threaded with fishing head 1 and presses closer leather cup 3.
During use, earlier spring 12 and alignment pin 11 insertion mandrels 10 backs are filled in from discharging cover 8 upper ends, screw on stop collar 5, shear pin 6 and spacing ring 13 again, connect gland 4, leather cup 3 successively, protect bowl 2 and fishing head 1,10 times termination plugs 14 of mandrel, tubing plug after the lower end insertion of seating nipple 7, is connected lower contact 16, and the tubing plug assembling is finished.Then the tubing plug that assembles is connected on the tubing string optional position goes into well.When being connected with oil pipe, the pin thread of tubing plug seating nipple 7 with the connecting portion oil pipe is connected, the lower contact 16 of tubing plug is connected with the box cupling of oil pipe, promptly stopped up the tubing string passage after connecting, on it can bear in the oil pipe, following pressure reduction, need to remove when stopping up, can squeeze into fluid with pump from well head and cause that end pressure is higher than end pressure under the tubing plug (promptly just suppressing) on the tubing plug, at this moment, miscellaneous part integral body on seating nipple 7 and lower contact 16 tubing plugs is descending, it is spacing by lower contact 16 to discharge cover 8, mandrel 10 is cut off shear pin 6 and is continued descending, alignment pin 5 is ejected, embed in the groove that discharges cover 8 and spacing ring 13 formations, this moment, mandrel 10 middle part projectioies divided the constraint of claw 9 also to be disengaged to discharging on the cover 8, after the termination of pumping, top plug 14 drives mandrel 10 and discharges cover 8 whole up on the downforce, branch claw 9 is regained so that by the projection in the seating nipple 7 to discharging cover 8 axle center, subsequently, except that seating nipple 7 and lower contact 16, miscellaneous part integral body on the tubing plug is ejected seating nipple 7, is caught by the well head catcher at well head, and leather cup 3 can make that tubing plug is easier to be rushed out.Be not enough to it is gone out if press down, also can be lowered to fishing tool and drag for fishing head 1 its proposition.Tubing plug screws off spacing ring 13 after taking out, and mandrel 10 and spring 12, alignment pin 11 are extracted out from discharging in the cover 8, after the maintaining, presses the preceding method assembling, and is reusable.
Claims (3)
1, a kind of tubing plug, by seating nipple (7), lower contact (16), plug (14) and fishing head (1) are formed, spacing and the relieving mechanism that it is characterized in that tubing plug is by stop collar (5), discharge cover (8), mandrel (10), alignment pin (11), spring (12), spacing ring (13) and plug (14) are formed, mandrel (10) upper end is threaded with gland (4), the lower end is on plug (14), sealing ring (15) is arranged on the plug (14), stop collar (5) is fixed together by shear pin (6) and mandrel (10), discharge cover (8) and stop collar (5), spacing ring (13) is threaded, alignment pin (11) is inserted in the pin-and-hole of mandrel (10) middle part boss, and spring (12) is arranged in the pin-and-hole.
2, tubing plug as claimed in claim 1 is characterized in that discharging position limiting structure on the cover (8) for dividing claw (9), divides claw (9) protruding spacing by on the mandrel (10).
3, tubing plug as claimed in claim 1 is characterized in that also overlapping according to this on the fishing head (1) and protects bowl (2) and leather cup (3), and leather cup (3) is pressed closer by the gland (4) that is threaded with fishing head (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99253285 CN2419369Y (en) | 1999-11-23 | 1999-11-23 | Oil pipe plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99253285 CN2419369Y (en) | 1999-11-23 | 1999-11-23 | Oil pipe plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2419369Y true CN2419369Y (en) | 2001-02-14 |
Family
ID=34037216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99253285 Expired - Lifetime CN2419369Y (en) | 1999-11-23 | 1999-11-23 | Oil pipe plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2419369Y (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 |
| CN114439423A (en) * | 2020-11-06 | 2022-05-06 | 中国石油化工股份有限公司 | Pumping type oil pipe plugging valve |
-
1999
- 1999-11-23 CN CN 99253285 patent/CN2419369Y/en not_active Expired - Lifetime
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 |
| CN114439423A (en) * | 2020-11-06 | 2022-05-06 | 中国石油化工股份有限公司 | Pumping type oil pipe plugging valve |
| CN114439423B (en) * | 2020-11-06 | 2024-04-05 | 中国石油化工股份有限公司 | Pumping type oil pipe blocking valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |