CN104727774A - Wellhead blowout preventer for well repair - Google Patents
Wellhead blowout preventer for well repair Download PDFInfo
- Publication number
- CN104727774A CN104727774A CN201510109283.8A CN201510109283A CN104727774A CN 104727774 A CN104727774 A CN 104727774A CN 201510109283 A CN201510109283 A CN 201510109283A CN 104727774 A CN104727774 A CN 104727774A
- Authority
- CN
- China
- Prior art keywords
- valve base
- glue core
- hole
- slope
- 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.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
Abstract
The invention discloses a wellhead blowout preventer for well repair. The wellhead blowout preventer for well repair comprises a bracket and a cover board. A blind hole is formed in the side of the bracket. A slope A is arranged in the middle of the adjusting rod. Extending parts parallel to the side of the bracket are fixed to the two ends of the cover board. Arc-shaped elastic connecting pieces are arranged at the middle portions of the extending parts. An adsorption groove communicated with the blind hole is formed in the side wall of the bracket. The movable end of an inward-jacking rod is provided with a slope B matched with the slope A, penetrates through the adsorption groove and is arranged in the blind hole. The slope A and the slope B are in contact fit. The inward-jacking rod moves outwards and drives two connecting rods to move forwards continuously. The other ends of the two connecting rods are hinged to the arc-shaped elastic connecting pieces and exert tension to the arc-shaped elastic connecting pieces, so that the arc-shaped elastic connecting pieces are deformed and changed into a linear shape. Enough containing space is provided for cables, it is guaranteed that the cables are placed simultaneously, and the protection function achieved by a cable bridge for the cables is guaranteed.
Description
Technical field
The present invention relates to a kind of preventer, specifically refer to well workover wellhead blowout preventor.
Background technology
In oil mining process, sleeve pipe is the necessary condition ensureing that Oil/gas Well is normally produced, and oil well causes casing failure often to occur because of a variety of causes, therefore reparation oil well casing is the key component in workover process, casing failure mainly contains following several situation: one is sleeve shrinking diameter, namely the casing inner diameter of oil well has diminished, and cause lower well tool can't pass, oil well cannot normally be produced; Two is casing collapses, and namely the casing collapse of oil well becomes seam or hole, causes formation sand to pour in well, Oil/gas Well is stopped production; Three is sleeve pipe dislocation, disconnection, and some casings can fracture, and fracture staggers up and down.Current oil field is in actual well workover process, to repair sleeve pipe, need first oil pipe to be taken out, but during lower elevator lifting oil pipe, easily the ring gasket groove of tubing head four-way is produced and collide with, damage ring gasket groove, simultaneously due to the residual pressure of down-hole, often there is natural gas or crude oil leakage, even occur well kick, blowout phenomenon.Producing to well workover and bring serious safety hazards, is insoluble problem all the time in oil well repairing operation process.Therefore, designing one can either security protection ring gasket groove, automatically can control again the device that well kick, blowout phenomenon occur suddenly, simultaneously can be cost-saving, is to produce and the problem of applying unit common need solution.
Summary of the invention
The object of the present invention is to provide well workover wellhead blowout preventor, arrive the object controlling well kick, blowout occur suddenly.
Object of the present invention is achieved through the following technical solutions:
Well workover wellhead blowout preventor, comprise upper valve base and the lower valve base of mutual clamping, through hole on having in the middle part of upper valve base, lower valve base is provided with the lower through-hole coaxial with upper through hole, described upper through hole, lower through-hole and oil pipe matched in clearance, the inwall of described upper valve base is hingedly connected with two ends give prominence to and the tubular rubber core of medial recess, the minimum diameter of described glue core is less than the external diameter of described oil pipe, the inwall of described glue core is arranged at intervals with multiple hemispheric adsorption tank, all screw is had at described upper valve base and lower valve base two ends, and groove is set in the screw upper end at upper valve base two ends, the inner pad cap be communicated with screw is had at groove internal fixtion, the upper end of pad cap is provided with expanding reach, and the cross section of this expanding reach is right-angled trapezium.In well workover process, need first oil pipe to be lifted by crane, but easily the ring gasket groove generation of tubing head four-way is collided with, damage ring gasket groove, simultaneously due to the residual pressure of down-hole, often crude oil leakage occurs, even occur well kick, blowout phenomenon, the present invention adds upper valve base and the lower valve base of mutual clamping on the workover rig at well head place, and the glue core be hinged on upper valve base inwall and oil pipe fit tightly, realize the separation that well head is located up and down, when unexpected generation blowout or well kick, liquid or the gas pressure effect of down-hole are applied to the bottom of glue core by lower through-hole, and glue core is the tubular structure that medial recess is given prominence at two ends, can draw close on the inwall of lower valve base after being under pressure bottom glue core, namely occur that glue core bottom interior wall local departs from oil pipe, there is certain deformation in the top of glue core simultaneously, namely the epimere local of glue core contacts with oil pipe the contact loss making up glue core lower end and oil pipe, multiple hemispheric adsorption tanks that the inwall of glue core is offered utilize atmospheric pressure absorption principle and oil-pipe external wall to fit tightly, all the time the contact with oil pipe in the middle part of glue core is ensured, when avoiding well kick or blowout, crude oil leaks,
Wherein the screw that arranged by its two ends of upper valve base and lower valve base and workover rig are connected and fixed, but there will be when fixing between valve seat and workover rig and stick together, because the casing repairing time is longer, and crude oil residual in its surrounding environment can solidify in gap between, and then cause increasing in blowout hookup difficulty when dismantling, the present invention offers groove in the upper end of screw, groove internal fixtion has pad cap, when upper valve base and workover rig are connected and fixed, the expanding reach of pad cap is placed between the two, make it to leave larger space, one end, and the material padding cap can preferred elastomeric rubber, exposed connecting bolt can wrap up by pad cap, connecting bolt can be avoided to be subject to the erosion of extraneous crude oil while, facilitate the dismounting of blowout hookup.
Further, also comprise bouncing ball, described bouncing ball is fixed on the recess of described glue outer core, and is connected with the inwall of lower valve base.Glue core is by bouncing ball and lower valve base contact internal walls, when making in the impact being subject to crude oil in sleeve pipe, deformation to occur bottom glue core, utilize the deformation of bouncing ball self to accelerate glue core top and certain deformation occurs with this to make up the contact loss of glue core lower end, prevent in the middle part of glue core and occur crack between oil pipe and cause crude oil leakage.
Further, the longitudinal section of described bouncing ball is circular or oval.As having preferably, the cross section of bouncing ball is set to circle or ellipse, while making one end of bouncing ball that compressive deformation occur, its other end then occurs to expand deformation, and then the epimere of glue core is responded in time, contact with oil pipe fast, reduce the possibility that crude oil is revealed.
The present invention compared with prior art, has following advantage and beneficial effect:
1, the present invention is when unexpected generation blowout or well kick, liquid or the gas pressure effect of down-hole are applied to the bottom of glue core by lower through-hole, and glue core is the tubular structure that medial recess is given prominence at two ends, can draw close on the inwall of lower valve base after being under pressure bottom glue core, namely occur that glue core bottom interior wall local departs from oil pipe, there is certain deformation in the top of glue core simultaneously, namely the epimere local of glue core contacts with oil pipe the contact loss making up glue core lower end and oil pipe, multiple hemispheric adsorption tanks that the inwall of glue core is offered utilize atmospheric pressure absorption principle and oil-pipe external wall to fit tightly, all the time the contact with oil pipe in the middle part of glue core is ensured, when avoiding well kick or blowout, crude oil leaks,
2, glue core of the present invention is by bouncing ball and lower valve base contact internal walls, when making in the impact being subject to crude oil in sleeve pipe, deformation to occur bottom glue core, utilize the deformation of bouncing ball self to accelerate glue core top and certain deformation occurs with this to make up the contact loss of glue core lower end, prevent in the middle part of glue core and occur crack between oil pipe and cause crude oil leakage;
3, the cross section of bouncing ball of the present invention is set to circle or ellipse, while making one end of bouncing ball that compressive deformation occur, its other end then occurs to expand deformation, and then the epimere of glue core is responded in time, contact with oil pipe fast, reduce the possibility that crude oil is revealed.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present invention, forms a application's part, does not form the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is structural representation of the present invention;
Mark and corresponding component title in accompanying drawing:
1-bouncing ball, 2-upper valve base, 3-glue core, 4-oil pipe, the upper through hole of 5-, 6-adsorption tank, 7-lower valve base, 8-lower through-hole, 9-screw, 10-pad cap.
Detailed description of the invention
Clearly understand for making the object, technical solutions and advantages of the present invention, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and exemplary embodiment of the present invention and explanation thereof are only for explaining the present invention, not as a limitation of the invention.
Embodiment 1
As shown in Figure 1, the present embodiment comprises upper valve base 2 and the lower valve base 6 of mutual clamping, through hole 5 is had in the middle part of upper valve base 2, lower valve base 6 is provided with the lower through-hole 8 coaxial with upper through hole 5, described upper through hole 5, lower through-hole 8 and oil pipe 4 matched in clearance, the inwall of described upper valve base 2 is hingedly connected with two ends give prominence to and the tubular rubber core 3 of medial recess, the minimum diameter of described glue core 3 is less than the external diameter of described oil pipe 4, the inwall of described glue core 3 is arranged at intervals with multiple hemispheric adsorption tank 6, screw 9 is all had with lower valve base 7 two ends at described upper valve base 2, and groove is set in screw 9 upper end at upper valve base 2 two ends, the inner pad cap 10 be communicated with screw 9 is had at groove internal fixtion, the upper end of pad cap 10 is provided with expanding reach, and the cross section of this expanding reach is right-angled trapezium.In well workover process, need first oil pipe 4 to be lifted by crane, but easily the ring gasket groove generation of oil pipe 4 four-ways is collided with, damage ring gasket groove, simultaneously due to the residual pressure of down-hole, often crude oil leakage occurs, even occur well kick, blowout phenomenon, the present invention adds upper valve base 2 and the lower valve base 6 of mutual clamping on the workover rig at well head place, and the glue core 3 be hinged on upper valve base 2 inwall fits tightly with oil pipe 4, realize the separation that well head is located up and down, when unexpected generation blowout or well kick, liquid or the gas pressure effect of down-hole are applied to the bottom of glue core 3 by lower through-hole 8, and glue core 3 is for giving prominence to the tubular structure of medial recess in two ends, can draw close on the inwall of lower valve base 6 after being under pressure bottom glue core 3, namely occur that glue core 3 bottom interior wall local departs from oil pipe 4, there is certain deformation in the top of glue core 3 simultaneously, namely the epimere local of glue core 3 contacts with oil pipe 4 contact loss making up glue core 3 lower end and oil pipe 4, the multiple hemispheric adsorption tank 6 that the inwall of glue core 3 is offered utilizes atmospheric pressure absorption principle and oil pipe 4 outer wall to fit tightly, all the time the contact with oil pipe 4 in the middle part of glue core 3 is ensured, when avoiding well kick or blowout, crude oil leaks,
The screw 9 that wherein upper valve base 2 and lower valve base 7 are arranged by its two ends is connected and fixed with workover rig, but there will be when fixing between valve seat and workover rig and stick together, because the casing repairing time is longer, and crude oil residual in its surrounding environment can solidify in gap between, and then cause increasing in blowout hookup difficulty when dismantling, the present invention offers groove in the upper end of screw 9, groove internal fixtion has pad cap 10, when upper valve base 2 is connected and fixed with workover rig, the expanding reach of pad cap 10 is placed between the two, make it to leave larger space, one end, and the material padding cap 10 can preferred elastomeric rubber, exposed connecting bolt can wrap up by pad cap 10, connecting bolt can be avoided to be subject to the erosion of extraneous crude oil while, facilitate the dismounting of blowout hookup.
Also comprise bouncing ball 1, described bouncing ball 1 is fixed on the recess of described glue core 3 outer wall, and is connected with the inwall of lower valve base 6.Glue core 3 is by bouncing ball 1 and lower valve base 6 contact internal walls, when making in the impact being subject to crude oil in sleeve pipe, deformation to occur bottom glue core 3, utilize the deformation of bouncing ball 1 self to accelerate glue core 3 top and certain deformation occurs with this to make up the contact loss of glue core 3 lower end, prevent in the middle part of glue core 3 and occur crack between oil pipe 4 and cause crude oil leakage.
As having preferably, the cross section of bouncing ball 1 is set to circle or ellipse, while making one end of bouncing ball 1 that compressive deformation occur, its other end then occurs to expand deformation, and then the epimere of glue core 3 is responded in time, contact with oil pipe 4 fast, reduce the possibility that crude oil is revealed.
Above-described detailed description of the invention; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. well workover wellhead blowout preventor, comprise the upper valve base (2) of mutual clamping and lower valve base (7), upper through hole (5) is had at upper valve base (2) middle part, lower valve base (7) is provided with the lower through-hole (8) coaxial with upper through hole (5), described upper through hole (5), lower through-hole (8) and oil pipe (4) matched in clearance, it is characterized in that: on the inwall of described upper valve base (2), be hingedly connected with two ends give prominence to and the tubular rubber core of medial recess (3), the minimum diameter of described glue core (3) is less than the external diameter of described oil pipe (4), the inwall of described glue core (3) is arranged at intervals with multiple hemispheric adsorption tank (6), screw (9) is all had at described upper valve base (2) and lower valve base (7) two ends, and groove is set in screw (9) upper end at upper valve base (2) two ends, the inner pad cap (10) be communicated with screw (9) is had at groove internal fixtion, the upper end of pad cap (10) is provided with expanding reach, and the cross section of this expanding reach is right-angled trapezium.
2. well workover wellhead blowout preventor according to claim 1, is characterized in that: also comprise bouncing ball (1), and described bouncing ball (1) is fixed on the recess of described glue core (3) outer wall, and is connected with the inwall of lower valve base (7).
3. well workover wellhead blowout preventor according to claim 1 and 2, is characterized in that: the longitudinal section of described bouncing ball (1) is for circular or oval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510109283.8A CN104727774A (en) | 2015-03-13 | 2015-03-13 | Wellhead blowout preventer for well repair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510109283.8A CN104727774A (en) | 2015-03-13 | 2015-03-13 | Wellhead blowout preventer for well repair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104727774A true CN104727774A (en) | 2015-06-24 |
Family
ID=53452115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510109283.8A Pending CN104727774A (en) | 2015-03-13 | 2015-03-13 | Wellhead blowout preventer for well repair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104727774A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2773304Y (en) * | 2005-03-30 | 2006-04-19 | 上海神开石油化工设备有限公司 | Circular blowout preventer for petroleum and natural gas drilling well |
| CN201460796U (en) * | 2009-06-22 | 2010-05-12 | 宁波佳乐特橡塑机电有限公司 | Ball-shaped rubber core of universal blowout preventer |
| CN201539227U (en) * | 2009-11-06 | 2010-08-04 | 宝鸡石油机械有限责任公司 | Combined annular blowout preventer |
| CN202055795U (en) * | 2011-04-20 | 2011-11-30 | 任丘市铁虎石油机械有限公司 | Double layer tubular rubber core annular blowout preventer |
| WO2012067672A1 (en) * | 2010-11-16 | 2012-05-24 | Smith International, Inc. | Rcd sealing elements with multiple elastomer materials |
| CN202937219U (en) * | 2012-09-22 | 2013-05-15 | 盐城金龙达机械制造有限公司 | Lip type conical surface self-seal blowout-preventive well repair device |
| US20130341538A1 (en) * | 2012-06-26 | 2013-12-26 | Hydril Usa Manufacturing Llc | Fiber Reinforced Elastomer Anisotropic Annular Blowout Preventer |
-
2015
- 2015-03-13 CN CN201510109283.8A patent/CN104727774A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2773304Y (en) * | 2005-03-30 | 2006-04-19 | 上海神开石油化工设备有限公司 | Circular blowout preventer for petroleum and natural gas drilling well |
| CN201460796U (en) * | 2009-06-22 | 2010-05-12 | 宁波佳乐特橡塑机电有限公司 | Ball-shaped rubber core of universal blowout preventer |
| CN201539227U (en) * | 2009-11-06 | 2010-08-04 | 宝鸡石油机械有限责任公司 | Combined annular blowout preventer |
| WO2012067672A1 (en) * | 2010-11-16 | 2012-05-24 | Smith International, Inc. | Rcd sealing elements with multiple elastomer materials |
| CN202055795U (en) * | 2011-04-20 | 2011-11-30 | 任丘市铁虎石油机械有限公司 | Double layer tubular rubber core annular blowout preventer |
| US20130341538A1 (en) * | 2012-06-26 | 2013-12-26 | Hydril Usa Manufacturing Llc | Fiber Reinforced Elastomer Anisotropic Annular Blowout Preventer |
| CN202937219U (en) * | 2012-09-22 | 2013-05-15 | 盐城金龙达机械制造有限公司 | Lip type conical surface self-seal blowout-preventive well repair device |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150624 |