CN202417414U - Double-lock blanking plug for blowout prevention of oil pipe - Google Patents
Double-lock blanking plug for blowout prevention of oil pipe Download PDFInfo
- Publication number
- CN202417414U CN202417414U CN2012200654083U CN201220065408U CN202417414U CN 202417414 U CN202417414 U CN 202417414U CN 2012200654083 U CN2012200654083 U CN 2012200654083U CN 201220065408 U CN201220065408 U CN 201220065408U CN 202417414 U CN202417414 U CN 202417414U
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- CN
- China
- Prior art keywords
- blanking plug
- cam
- plug body
- double
- seating nipple
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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 - Fee Related
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Abstract
The utility model relates to a double-lock blanking plug for blowout prevention of oil pipe, and the double-block blanking plug comprises a blanking plug body and a working barrel, wherein two cam groups are arranged in the blanking plug body in up and down stages; a cam cavity (6) for installing cams (5) is arranged in the blanking plug body; the lower part of an upper joint (1) of the blanking plug body is connected with the cam cavity (6); the lower end of the cam cavity (6) is connected with a seal section (7); the working barrel is composed of an upper joint (9), a barrel main body (10) and a seal barrel (11); and two steps are arranged at the inner wall of the barrel main body (10). The double-lock blanking plug disclosed by the utility has the advantages that the safety is good so as to ensure that the blanking plug can also be hitched when being applied in a well having large thickened oil downward resistance; the hitching is reliable so as to ensure that the problem that the blanking plug cannot be hitched and flies out of a tubular column is solved; and therefore, the potential safety hazard is thoroughly eliminated, the accident of hurting people is avoided from happening and the production safety is guaranteed.
Description
Technical field
During oil well lift pipe string operation that the utility model relates to, preventing blowout hookup in the pipe of hydrojet, specifically is that the twin-lock blanking plug is used in a kind of oil pipe blowout prevention.
Background technology
During the operation of oil well lift pipe string,, need on tubing string, to install blowout hookup in order to prevent to manage interior hydrojet; Tubing string bottom installation work tube; Before lift pipe string, supporting blanking plug is dropped in the oil pipe, cooperate with seating nipple and hang the jail; Thereby block tubing string, can play the effect that when lift pipe string, prevents oil spout in the tubing string.
Conventional blanking plug has only the one-level cam that hangs tag, and the step that the seating nipple overhead cam supporting with it hangs tag also is to have only one-level.After blanking plug drops in the well, when the seal section of blanking plug bottom when falling into the cooperation section of seating nipple, at this moment no longer included pendular ring around the seal section, be not the free-falling state in liquid just, but it is descending to paste the cooperation section inwall of seating nipple.This moment, descending blanking plug not only will overcome the resistance of seal, and the liquid that also will promote under it simultaneously is descending.Before falling to putting in place at blanking plug; The kinetic energy that falls is exhausted by these resistances, and then blanking plug just falls less than preposition, and cam is not also just hung the corresponding step of seating nipple; Blanking plug just can not be lockable yet like this; So in the lift pipe string process, blanking plug just might fly out, form potential safety hazard under borehole pressure.
Summary of the invention
The goal of the invention of the utility model is to provide a kind of oil pipe blowout prevention use the twin-lock blanking plug to the problems referred to above, solves fly out because of the losing control of one's feelings problem of tubing string of blanking plug, elimination potential safety hazard, assurance production safety.
The utility model is realized through following technical scheme: this oil pipe blowout prevention comprises blanking plug body and seating nipple with the twin-lock blanking plug; Two cam set are arranged in the blanking plug body, and two cam set two-stage settings up and down in the blanking plug body have the cams mounted chamber of taking turns in the blanking plug body, and the bottom of blanking plug body top connection is connected with the wheel chamber, and wheel lower end, chamber connects seal section; Seating nipple is made up of top connection, tube main body and sealing drum, and wherein the inwall of tube main body has the two-stage step; Described cam set is made up of top connection, limited block, torsion spring, wheel shaft, cam, and limited block is between the bottom and wheel chamber of body top connection, and wheel shaft passes cam and torsion spring and wheel chamber and fixes; Described seal section bottom is the stepped ramp type cylinder, its with the section of cooperation of seating nipple on be with the rubber packing.
Adopt the good effect of technique scheme: the utility model has been compared following advantage with the blanking plug that has only the one-level cam of routine:
1. safety is good, also can hang to such an extent that live in the big well planted agent time spent of the descending resistance of viscous crude, is unlikely the security incident that blanking plug flies out and hurts sb.'s feelings takes place;
2. articulate reliably, can not fly out and lose effect because of losing control of one's feelings.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation that sealed condition is joined and be when using to blanking plug body and seating nipple in the utility model.
Among the figure: 1 top connection, 2 limited blocks, 3 torsion springs, 4 wheel shafts, 5 cams, 6 are taken turns chamber, 7 seal sections, 8 packings, 9 top connections, 10 main bodys, 11 sealing drums.
The specific embodiment: the utility model is described further below in conjunction with accompanying drawing:
Fig. 1 is the structural representation of the utility model, and is as shown in the figure, and this oil pipe blowout prevention comprises blanking plug body and seating nipple two partly with the twin-lock blanking plug.Two cam set are arranged in the blanking plug body, and two cam set are two-stage settings up and down in the blanking plug body, and the wheel chamber 6 of mounting cam 5 is arranged in the blanking plug body.Cam set is made up of top connection 1, limited block 2, torsion spring 3, wheel shaft 4, cam 5; Wheel shaft 4 pass cam 5 and torsion spring 3 two ends and wheel chamber 6 fixing after; Limited block 2 is put into wheel chamber 6 again screwed connection is used with wheel chamber 6 in the bottom of body top connection 1 with cam 5 aligned position; Simultaneously limited block 2 is fixedly clamped, takes turns 6 lower ends, chamber and seal section 7 screwed connections for second group.Seal section 7 bottoms are the stepped ramp type cylinder, its with the section of cooperation of seating nipple on cover be useful on the rubber packing 8 of sealing.Seating nipple is made up of top connection 9, tube main body 10 and sealing drum 11, and tube main body 10 is used screwed connection with top connection 9 and sealing drum 11, and the inwall of tube main body 10 has the two-stage step, and cam 5 is used to hang tag.When being advanced into the seating nipple main body under the blanking plug; Cam 5 is moved upward by the internal diameter restriction of seating nipple main body 10; After seal section 7 gets into sealing drum 11; Cam 5 resets under the effect of torsion spring 3, is stuck on the two-stage step of a main body 10 inner chambers, and blocks when borehole pressure changes at assurance blanking plug under the effect of limited block 2 and not fly out.
Fig. 2 is the structural representation that sealed condition is joined and be when using to blanking plug body and seating nipple in the utility model.During work, the top connection 9 with seating nipple when lower tubular column is connected with tubing string, and seating nipple is waiting that with tubing string throwing stifled state goes into the well.When this well needs lift pipe string, the blanking plug body is dropped in the oil pipe.Because in the blanking plug main body two-stage cam is arranged, the two-stage cam is positioned at the top of seal section 7, the also corresponding step that is provided with two-stage card cam on the inwall of seating nipple tube main body 10; When the cooperation section that begins to get into seating nipple at the seal section of blanking plug is hampered; Subordinate's cam has just been crossed higher level's step of seating nipple, has so both made when kinetic energy exhausts blanking plug not fall the precalculated position, and promptly subordinate's cam fails to be tangled by subordinate's step of seating nipple; But because of higher level's cam has at this moment got into higher level's step; So also can not fly the accident of blanking plug, the structural behavior during its shutoff is as shown in Figure 2, thereby plays safety guarantee.
Claims (1)
1. the twin-lock blanking plug is used in an oil pipe blowout prevention; Comprise blanking plug body and seating nipple; It is characterized in that: two cam set are arranged in the blanking plug body, and two cam set are two-stage settings up and down in the blanking plug body, and the wheel chamber (6) of mounting cam (5) is arranged in the blanking plug body; The bottom of blanking plug body top connection (1) is connected with wheel chamber (6), and wheel lower end, chamber (6) connects seal section (7); Seating nipple is made up of top connection (9), tube main body (10) and sealing drum (11), and wherein the inwall of tube main body (10) has the two-stage step; Described cam set is made up of top connection (1), limited block (2), torsion spring (3), wheel shaft (4), cam (5); Limited block (2) is positioned between the bottom and wheel chamber (6) of body top connection (1), and wheel shaft (4) passes cam (5) and torsion spring (3) is fixing with wheel chamber (6); Described seal section (7) bottom is the stepped ramp type cylinder, its with the section of cooperation of seating nipple (10) on be with rubber packing (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200654083U CN202417414U (en) | 2012-02-27 | 2012-02-27 | Double-lock blanking plug for blowout prevention of oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200654083U CN202417414U (en) | 2012-02-27 | 2012-02-27 | Double-lock blanking plug for blowout prevention of oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202417414U true CN202417414U (en) | 2012-09-05 |
Family
ID=46742187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200654083U Expired - Fee Related CN202417414U (en) | 2012-02-27 | 2012-02-27 | Double-lock blanking plug for blowout prevention of oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202417414U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832124A (en) * | 2015-05-26 | 2015-08-12 | 大庆金祥寓科技有限公司 | Safe blowout prevention working barrel |
| CN106677735A (en) * | 2016-11-23 | 2017-05-17 | 中国石油天然气股份有限公司 | Blocking device for drainage gas recovery of horizontal well velocity string |
| CN112610183A (en) * | 2020-12-23 | 2021-04-06 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Pressure self-balancing double-barrier plug for pressurized well completion of high-pressure gas well |
-
2012
- 2012-02-27 CN CN2012200654083U patent/CN202417414U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832124A (en) * | 2015-05-26 | 2015-08-12 | 大庆金祥寓科技有限公司 | Safe blowout prevention working barrel |
| CN106677735A (en) * | 2016-11-23 | 2017-05-17 | 中国石油天然气股份有限公司 | Blocking device for drainage gas recovery of horizontal well velocity string |
| CN112610183A (en) * | 2020-12-23 | 2021-04-06 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Pressure self-balancing double-barrier plug for pressurized well completion of high-pressure gas well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20160227 |