CN203488141U - Tubing plug - Google Patents
Tubing plug Download PDFInfo
- Publication number
- CN203488141U CN203488141U CN201320598160.1U CN201320598160U CN203488141U CN 203488141 U CN203488141 U CN 203488141U CN 201320598160 U CN201320598160 U CN 201320598160U CN 203488141 U CN203488141 U CN 203488141U
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- CN
- China
- Prior art keywords
- plug
- tubing
- shear pin
- urceolus
- core
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- 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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Abstract
The utility model discloses a tubing plug which comprises a plug outer barrel and a plug core fixed inside the plug outer barrel. The tubing plug further comprises shear pins, lock screws and sealing rings. One end of the plug outer barrel is fixedly connected with a connector end of an oil tube in a sealing mode, a columnar hollow cavity is formed in the other end of the plug outer barrel, and at least one locking hole is formed in the barrel wall of the other end of the plug outer barrel. At least one annular groove is formed in the outer circumference of the plug core, shear pin inserting holes are formed in the position, corresponding to the locking holes, of the plug core, the sealing rings are arranged in the annular grooves in a sleeved mode, the shear pins are arranged in the locking holes and the shear pin inserting holes in a penetrating mode, and the locking screws are locked in the locking holes. The tubing plug solves the problems that in the prior art a plug is fixed mainly by using the friction force between an oil tube wall and the plug, the plug can fall off accidentally in a coiled tubing laying process, poor sealing can be caused due to pitting corrosion of the tube wall of coiled tubing, and stability and reliability of sealing are high.
Description
Technical field
The utility model relates to oil mining technical field, particularly relates to a kind of tubing plug for water drainage-gas recovery technology.
Background technology
The water drainage-gas recovery technology of gas well, it is theoretical ripe, construction is easy, convenient management, and working system is adjustable, the phase of being excused from a college course is long, small investment, except preferably and the oil pipe that matches of stratum flox condition, special installation and power set in addition, to make full use of gas well self-energy to realize continuous drainage production, to extend the gas well band water production practice technology of flush stage.
In coiled tubing water drainage-gas recovery technology step, all need to use water pumping gas production blanking plug sealing tubing string end, water pumping gas production blanking plug is very high to its reliability requirement in the whole process of water pumping gas production operation for this reason.Both needed to meet and when well head is installed, realized tubing string end seal, and when going into operation, can easily open operation passage again.
Employing is lowered to minor diameter coiled tubing as flow string in original flow string, can improve gas well discharge opeing ability, makes gas well recover blowing and produces.During this operation, do not need kill-job, avoided kill-job injury stratum, reduced to trip out the risk that original tubing string causes the disconnected complex accident such as de-of oil pipe simultaneously.But because tubing string end in coiled tubing water pumping gas production tubing string process is installed needs positiver sealing, original design is directly to pack a plunger matching with coiled tubing internal diameter at coiled tubing end, prior art is mainly by the fixing stopper of the frictional force between coiled tubing wall and stopper, sealing is that the sealing ring by stopper contacts realization with coiled tubing tube wall, by ground, is suppressed and is destroyed stopper and go into operation.Prior art is mainly by the fixing stopper of the frictional force between coiled tubing wall and stopper, stopper may surprisingly drop in lower coiled tubing process, coiled tubing tube wall may due to corrosion, to occur that pitting corrosion causes poorly sealed, getting through the pressure of operation passage can not control, therefore its sealing and reliability all can not effectively be controlled, increase technique risk, restricted the popularization of this technique.
Utility model content
The purpose of this utility model is to propose a kind of tubing plug, the technical problem that all can not effectively control to solve existing plug seal and reliability.
In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:
A tubing plug, comprises blanking plug urceolus, is fixed on the obstruction core in blanking plug urceolus, also comprises shear pin, lock-screw and sealing ring;
The tip side of described blanking plug urceolus one end and oil pipe is sealedly and fixedly connected; The other end of described blanking plug urceolus has column cavity; And the barrel of the other end of described blanking plug urceolus is provided with at least one lock hole;
The excircle of described obstruction core is provided with at least one ring annular groove, stops up core and has shear pin jack in the position corresponding with described lock hole;
Described sealing ring is set in described annular groove, and described shear pin is located in lock hole and shear pin jack, and lock-screw locks at lock hole place.
Preferably, the excircle of described obstruction core is provided with 3 ring annular grooves.
Preferably, lock hole and shear pin jack are 1 or lock hole and shear pin jack is 2.
Preferably, the material of described shear pin is brass, and diameter is 2.5mm.
Further, described blanking plug urceolus one end is the AMMT box of 1 inch, and tubing plug is sealedly and fixedly connected on AMMT pin thread corresponding to oil connection end by described AMMT box.
Further, the maximum outside diameter of described blanking plug urceolus is 38.1mm.
Further, the external diameter of described obstruction core is 19mm, and the diameter of corresponding described column cavity is 19mm.
Further, the length of described shear pin is 5～7mm.
Compared with prior art, the beneficial effects of the utility model are:
1, the tip side due to blanking plug urceolus one end and oil pipe is sealedly and fixedly connected, avoided in prior art mainly by the fixing stopper of the frictional force between tubing wall and stopper, stopper may surprisingly drop in lower coiled tubing process, coiled tubing tube wall may cause poorly sealed problem because pitting corrosion appears in corrosion, and the Stability and dependability of sealing is high.
2, the utility model is to be connected with coiled tubing interface end by 1 inch of AMMT box, simple, the saving engineering time is installed during use, and can guarantees good sealing.
3, owing to having adopted new-type blanking plug unfolding mode, shear pin is located in lock hole and shear pin jack, and when needs are opened blanking plug, oil pipe connection nitrogen car processed is suppressed, and by pressure, shear pin is disconnected.By selecting material and the diameter of shear pin, can accurately calculate and suppress needed pressure, increase the controllability of construction.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the tubing plug schematic diagram of a kind of embodiment of the utility model;
Fig. 2 is the blanking plug urceolus schematic diagram of a kind of embodiment tubing plug of the utility model;
Fig. 3 is the obstruction core schematic diagram of a kind of embodiment tubing plug of the utility model;
Fig. 4 is the tubing plug schematic diagram of the another kind of embodiment of the utility model;
Fig. 5 is the tubing plug schematic diagram of another embodiment of the utility model.
In accompanying drawing, the list of parts of each label representative is as follows:
1, blanking plug urceolus, 12, AMMT box, 14, lock hole, 16, column cavity, 2, stop up core, 22, annular groove, 24, shear pin jack, 3, sealing ring, 4, shear pin, 5, lock-screw.
The specific embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail, but not as to restriction of the present utility model.
In the utility model, AMMT button refers to U.S.'s macaroni type tubing screw buckle.
As shown in Figure 1, be the tubing plug schematic diagram of a kind of embodiment of the utility model.This tubing plug comprises blanking plug urceolus 1, is fixed on the obstruction core 2 in blanking plug urceolus, also comprises shear pin 4, lock-screw 5 and sealing ring 3;
As shown in Figure 2, be blanking plug urceolus 1 schematic diagram of a kind of embodiment tubing plug of the utility model.The tip side of blanking plug urceolus one end and oil pipe is sealedly and fixedly connected; The other end of blanking plug urceolus has column cavity 16; And the barrel of the other end of blanking plug urceolus is provided with at least one lock hole 14.Described lock hole 14 is divided into two sections, and lock hole inner segment diameter is less than the outer section of lock hole, and lock hole inner segment diameter is identical with the diameter of shear pin, and the outer section of lock hole inwall is helicitic texture.
As shown in Figure 3, be obstruction core 2 schematic diagrames of a kind of embodiment tubing plug of the utility model.The excircle that stops up core 2 is provided with 3 ring annular grooves 22, stops up core 2 and has shear pin jack 24 in the position corresponding with lock hole 14.
In order to guarantee to stop up the sealing effectiveness between core and blanking plug urceolus, on the excircle of obstruction core, be preferably provided with 3 ring annular grooves.
In the present embodiment, lock hole and shear pin jack are 1.
By a large amount of experiment screenings, the material of having determined shear pin 4 is brass, and diameter is 2.5mm.Now, the shear pressure 8MPa of single pin, because material and the diameter of shear pin are determined, can control more accurately and suppress required pressure, increases the controllability in work progress.
In a preferred embodiment, blanking plug urceolus one end is the AMMT box 12 of 1 inch, and tubing plug is sealedly and fixedly connected on AMMT pin thread corresponding to oil connection end by AMMT box 12.
Further, the maximum outside diameter of blanking plug urceolus is 38.1mm.The external diameter that stops up core is 19mm, and the diameter of corresponding column cavity is 19mm.The length of shear pin is 5～7mm.
As shown in Figure 4, be the tubing plug schematic diagram of the another kind of embodiment of the utility model.In the present embodiment, the barrel of the other end of blanking plug urceolus is provided with 2 lock holes 14, and its center line is through blanking plug urceolus axle center.Stop up core 2 and there is respectively shear pin jack 24 in the position corresponding with lock hole 14.Other structures are identical with the first embodiment.Owing to being provided with two lock holes 14 of line through blanking plug urceolus axle center, and then adopt two symmetrical shear pins, can make like this to stop up core 2 stressed even when suppressing.
As shown in Figure 5, be the tubing plug schematic diagram of the another kind of embodiment of the utility model.The excircle that stops up in the present embodiment core 2 is provided with 1 ring annular groove 22.Other structures are identical with the second embodiment.More shallow for Oil/gas Well, sealing intensity demand is not that very large situation can adopt this structure, to save manufacturing process and the manufacturing cost of blanking plug.
Tubing plug of the present utility model installs, uses step as follows:
(1) install the O RunddichtringO stopping up on core;
(2) on sealing ring, smear appropriate butter, by stopping up core, be inserted in the column cavity of blanking plug urceolus, be in place;
(3) install shear pin, tighten lock-screw;
(4) by AMMT, detain the tip side that tubing plug is mounted to coiled tubing;
(5) transfer coiled tubing band blanking plug to the object degree of depth;
(6) complete after well head installation, connect nitrogen car processed and suppress, shear pin is disconnected, open tubing plug.
Above embodiment is only exemplary embodiment of the present utility model, is not used in restriction the utility model, and protection domain of the present utility model is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the utility model in essence of the present utility model and protection domain, this modification or be equal to replacement and also should be considered as dropping in protection domain of the present utility model.
Claims (8)
1. a tubing plug, comprises blanking plug urceolus, is fixed on the obstruction core in blanking plug urceolus, it is characterized in that, also comprises shear pin, lock-screw and sealing ring;
The tip side of described blanking plug urceolus one end and oil pipe is sealedly and fixedly connected; The other end of described blanking plug urceolus has column cavity; And the barrel of the other end of described blanking plug urceolus is provided with at least one lock hole;
The excircle of described obstruction core is provided with at least one ring annular groove, stops up core and has shear pin jack in the position corresponding with described lock hole;
Described sealing ring is set in described annular groove, and described shear pin is located in lock hole and shear pin jack, and lock-screw locks at lock hole place.
2. tubing plug according to claim 1, is characterized in that, the excircle of described obstruction core is provided with 3 ring annular grooves.
3. tubing plug according to claim 1, is characterized in that, lock hole and shear pin jack are 1 or lock hole and shear pin jack is 2.
4. tubing plug according to claim 1, is characterized in that, the material of described shear pin is brass, and diameter is 2.5mm.
5. according to the tubing plug described in claim 1-4 any one, it is characterized in that, described blanking plug urceolus one end is the AMMT box of 1 inch, and tubing plug is sealedly and fixedly connected on AMMT pin thread corresponding to oil connection end by described AMMT box.
6. tubing plug according to claim 5, is characterized in that, the maximum outside diameter of described blanking plug urceolus is 38.1mm.
7. tubing plug according to claim 6, is characterized in that, the external diameter of described obstruction core is 19mm, and the diameter of corresponding described column cavity is 19mm.
8. tubing plug according to claim 7, is characterized in that, the length of described shear pin is 5～7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598160.1U CN203488141U (en) | 2013-09-26 | 2013-09-26 | Tubing plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598160.1U CN203488141U (en) | 2013-09-26 | 2013-09-26 | Tubing plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203488141U true CN203488141U (en) | 2014-03-19 |
Family
ID=50258980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320598160.1U Expired - Lifetime CN203488141U (en) | 2013-09-26 | 2013-09-26 | Tubing plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203488141U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912236A (en) * | 2014-04-04 | 2014-07-09 | 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 | Coiled tubing tail pipe blockage device |
-
2013
- 2013-09-26 CN CN201320598160.1U patent/CN203488141U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912236A (en) * | 2014-04-04 | 2014-07-09 | 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 | Coiled tubing tail pipe blockage device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140319 |