CN205297447U - Well workover annular blowout preventer is bored in oil field - Google Patents
Well workover annular blowout preventer is bored in oil field Download PDFInfo
- Publication number
- CN205297447U CN205297447U CN201521025164.6U CN201521025164U CN205297447U CN 205297447 U CN205297447 U CN 205297447U CN 201521025164 U CN201521025164 U CN 201521025164U CN 205297447 U CN205297447 U CN 205297447U
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- slips
- packing element
- oil
- preventer
- torsion
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Abstract
The utility model provides a well workover annular blowout preventer is bored in oil field, belongs to shaft boring machine technical field. Well workover annular blowout preventer is bored in oil field includes upper end cover, casing and preventer core, the upper end cover passes through bolt assembly and shell assembly, the preventer core arranges in enclosing the cavity that closes by upper end cover and casing, is equipped with the torque transfer section of thick bamboo of slips assembly, the vertical packing element of arranging and rigidity material in the preventer core, both ends set up torsion propagation axis under torsion propagation axis on the packing element, the packing element respectively about the packing element, torsion propagation axis is hollow structure on the packing element, its inner wall be with slips assembly complex circular conical surface, torque transfer barrel casing dress is outside at the packing element. Well workover annular blowout preventer is bored in oil field have high pressure resistant can the reinforce, the universal performance is good, working life is long characteristics, be suitable for conventional borehole operation, area to press operation and underbalance drilling operation.
Description
Technical field
This utility model relates to a kind of drilling and repairing well blowout hookup, especially a kind of annular preventer being suitable to oil field drilling workover treatment, belongs to drilling equipment technical field.
Background technology
In petroleum gas drilling and repairing well work progress, for avoiding blowout out of control accident, need to install blowout hookup on well head, preventer mainly comprises parts as blowout hookup, not only there is certain voltage endurance capability, and after rotating blowout preventer is installed, also can carry out creeping into operation when no killing well.
Existing annular, spherical blow-out preventer latus rectum design all with reference to working string box cupling external diameter, and require that annular, spherical blow-out preventer latus rectum are slightly larger than working string box cupling external diameter, both differences are within 20mm, to ensure the interference bearing capacity of rubber packing element pressure-bearing cross section, thus above-mentioned preventer does not adapt to large span, many specifications running string, tool combinations combination process drilling and repairing well construction operation. Little additionally, due to existing under balance pressure drilling rotary annular bore diameter of preventer, bearing capacity is poor, the defect of ubiquity following aspect: one is it cannot be guaranteed that the instrument of multiple different-diameter size passes through, thus also need to change matched preventer when switching major diameter instrument; Two is that working string reduced diameter portion pulls out by force when passing through and drags by force the damage very easily causing packing element; Three is that under pressure, the cross section modification of rubber packing element is excessive when adopting major diameter packing element to coordinate small-size diameter string, and packing element meeting causes explosion failure because gushing outward tipping; Four is in rotary course, and packing element relies on frictional force to be held tightly by working string, outwards transmits moment of torsion simultaneously, and packing element not only to be limited by the crunch of hydraulic medium, but also to carry bigger shear stress, shortens its working life. The problems referred to above make existing under balance pressure drilling rotary annular preventer be difficult to be promoted the use of on a large scale.
Utility model content
The purpose of this utility model is the drawback for prior art, it is provided that a kind of high-voltage resistance capability is strong, universal performance good, long working life, is suitable to the oil field drilling well workover annular preventer of conventional underground work, Operating Pressure and under-balance drilling operation.
This utility model above-mentioned purpose is achieved through the following technical solutions:
A kind of oil field drilling well workover annular preventer, including upper end cover, housing and preventer core body;Described upper end cover is by bolt assembly and housing assembling; Described preventer core body is arranged in the cavity enclosed by upper end cover and housing, is provided with the torsion transmission cylinder of slips assembly, the packing element vertically arranged and rigid in preventer core body; The upper and lower two ends of described packing element are respectively provided with on packing element under torsion conduction axis, packing element torsion conduction axis, and on described packing element, torsion conduction axis is hollow structure, and its inwall is the taper seat coordinated with slips assembly; Described torsion transmission jacket casing is contained in outside packing element.
Above-mentioned oil field drilling well workover annular preventer, described preventer core body is additionally provided with annular packing element oil crusty pancake assembly, described annular packing element oil crusty pancake assembly includes oil crusty pancake body and is positioned at the oil crusty pancake seal head at oil crusty pancake body two ends, described oil crusty pancake body is coated on the external cylindrical surface of packing element, it is positioned at the oil crusty pancake seal head of oil crusty pancake body upper end and torsion is transmitted that cylinder and torsion conduction axis on packing element are fixing to be connected, be positioned at the oil crusty pancake seal head of oil crusty pancake body lower end and fix with torsion conduction axis under packing element and assemble.
Above-mentioned oil field drilling well workover annular preventer, described slips assembly includes supporting mechanism, driving mechanism and slips body, described slips body is arranged in the top of packing element, being made up of the one group of quantity slips monomer no less than six, slips body outer surface is the taper seat mated with torsion conduction axis hollow structure on packing element.
Above-mentioned oil field drilling well workover annular preventer, the supporting mechanism of described slips assembly includes slips base, support bar and a support plate; Described support bar is evenly arranged along slips base circumferencial direction, and its upper end and a support plate fix assembling, and lower end is fixing with torsion transmission cylinder assembles; Described slips base is provided with one group of support bar through hole, and slips base slides up and down along support bar under driving mechanism drives.
Above-mentioned oil field drilling well workover annular preventer, the driving mechanism of described slips assembly includes slips and gathers driving assembly and slips locking driving assembly; Described slips gathers one group of radial action oil cylinder that driving assembly includes being arranged in slips base, and described radial action oil cylinder mates with slips amount of monomer, the assembling fixing with corresponding slips monomer of the piston of radial action oil cylinder.
Above-mentioned oil field drilling well workover annular preventer, described slips locking drives assembly to include the one group of axial action oil cylinder being arranged in moment of torsion transmission cylinder sidewall, the assembling fixing with slips base of the piston rod upper end of axial action oil cylinder.
Above-mentioned oil field drilling well workover annular preventer, described preventer core body is by being arranged in self-aligning thrust roller bearing and upper end cover, the housing assembling of moment of torsion transmission cylinder upper/lower terminal, by the roller bearing and the housing assembling that are arranged under packing element on torsion conduction axis.
Above-mentioned oil field drilling well workover annular preventer, by the flange sealing structure of the flange sealing structure of upper end cover and housing and drilling equipment assembling.
This utility model needs hold tightly working string rotate make a trip preventing spraying operation time, radial action oil cylinder can be passed through and control the motion of slips body, each slips monomer is made to gather, made slips body move downward by axial action oil cylinder simultaneously, with coordinating of torsion conduction axis circular conical surface of inner wall on packing element, working string is held tightly by slips body taper seat; Now well pressure acts under packing element on the lower surface of torsion conduction axis, simultaneously by the control of the liquid flow direction and pressure in hydraulic circuit, applying radial compression power to packing element, makes packing element shrink to central axial direction, is held tightly by working string;In aforesaid operations process, owing on packing element, working string is held tightly by torsion conduction axis by slips body, and stoped packing element rubber to occur excessive glue Decrepitation Phenomena is turned in interference under well pressure effect by torsion conduction axis on packing element, not only avoid preventer Problem of Failure, reduce simultaneously and bore diameter of preventer and working string outside dimension coordinated requirement, therefore this utility model can coordinate with the working string of sizes specification, thus improve the universal performance of preventer. This utility model is also provided with annular packing element oil crusty pancake assembly, by being coated on oil crusty pancake body on the external cylindrical surface of packing element by the isolation of packing element and hydraulic oil medium, it is to avoid the impurity damage to the packing element with working string high speed rotating in high pressure liquid force feed medium. This utility model outwards transmits moment of torsion by the moment of torsion of rigid transmission cylinder, solves and is outwards transmitted the problem that packing element working life that moment of torsion causes is short in prior art by packing element. In a word, this utility model has that high-voltage resistance capability is strong, universal performance good, the feature of long working life, is suitable to conventional underground work, Operating Pressure and under-balance drilling operation.
Accompanying drawing explanation
Fig. 1 is oil field drilling well workover annular preventer structural representation described in the utility model;
Fig. 2 is the structural blast figure of Fig. 1;
Fig. 3 is preventer core body cross-sectional view (locking state);
Fig. 4 is A-A cross-sectional view in Fig. 3;
Fig. 5 is oil field drilling well workover annular preventer open mode cross-sectional view;
Fig. 6 is B-B cross-sectional view in Fig. 5;
Fig. 7 is oil field drilling well workover annular preventer locking state cross-sectional view;
Fig. 8 is C-C cross-sectional view in Fig. 7.
In figure, each list of reference numerals is: 1, upper end cover, 2, housing, 3, preventer core body, 3-1, prop up support plate, 3-2, support bar, 3-3, slips base, 3-4, moment of torsion transmission cylinder, 3-5, axial action oil cylinder, 3-6, the piston rod of axial action oil cylinder, 3-7, torsion conduction axis under packing element, 3-8, packing element, 3-9, annular packing element oil crusty pancake assembly, 3-9-1, oil crusty pancake seal head, 3-10, torsion conduction axis on packing element, 3-11 slips assembly, 3-12, radial action oil cylinder, 3-13, the piston of radial action oil cylinder, 4, working string, 5, self-aligning thrust roller bearing, 6, roller bearing.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Referring to Fig. 1, Fig. 2, oil field drilling well workover annular preventer described in the utility model includes upper end cover 1, housing 2 and preventer core body 3; Described upper end cover 1 is assembled by bolt assembly and housing 2; Described preventer core body 3 is arranged in the cavity enclosed by upper end cover 1 and housing 2. Oil field drilling well workover annular preventer described in the utility model can pass through the flange sealing structure of upper end cover 1 and the flange sealing structure of housing 2 and drilling equipment assembling.
Referring to Fig. 3, Fig. 4, oil field drilling well workover annular preventer described in the utility model is provided with the torsion transmission cylinder 3-4 of slips assembly 3-11, the packing element 3-8 vertically arranged and rigid in preventer core body 3; The described upper and lower two ends of packing element 3-6 are respectively provided with on packing element under torsion conduction axis 3-10, packing element torsion conduction axis 3-7, and on described packing element, torsion conduction axis 3-10 is hollow structure, and its inwall is and the slips assembly 3-11 taper seat coordinated; Described torsion transmission cylinder 3-4 is sleeved on outside packing element 3-8.
Referring to Fig. 3, Fig. 4, in oil field drilling well workover annular preventer described in the utility model, described slips assembly 3-11 includes supporting mechanism, driving mechanism and slips body.Described slips body is arranged in the top of packing element 3-8, is made up of the one group of quantity slips monomer no less than six, and slips body outer surface is the taper seat mated with torsion conduction axis 3-10 hollow structure on packing element. Described supporting mechanism includes slips base 3-3, support bar 3-2 and a support plate 3-1; Described support bar 3-2 is evenly arranged along slips base circumferencial direction, and its upper end and a support plate 3-1 fix assembling, and lower end is fixing with torsion transmission cylinder 3-4 assembles; Described slips base 3-3 is provided with one group of support bar through hole, and slips base 3-3 slides up and down along support bar 3-2 under driving mechanism drives. Described driving mechanism includes slips and gathers driving assembly and slips locking driving assembly; Described slips gathers one group of radial action oil cylinder 3-12 that driving assembly includes being arranged in slips base 3-3, and described radial action oil cylinder 3-12 mates with slips amount of monomer, the piston 3-13 of radial action oil cylinder assembling fixing with corresponding slips monomer; Described slips locking drives assembly to include the one group of axial action oil cylinder 3-5 being arranged in moment of torsion transmission cylinder 3-4 sidewall, the assembling fixing with slips base 3-3 of the piston rod 3-6 upper end of axial action oil cylinder.
Referring to Fig. 3, Fig. 4, in oil field drilling well workover annular preventer described in the utility model, described preventer core body 3 assembles with upper end cover 1, housing 2 by being arranged in the self-aligning thrust roller bearing 5 of moment of torsion transmission cylinder 3-4 upper/lower terminal, is assembled with housing 2 by the roller bearing 6 being arranged under packing element on torsion conduction axis 3-7; Therefore when preventer is in locking state, preventer core body 3 can with working string 4 high speed rotating, it is achieved that creep into operation in no killing well situation.
Referring to Fig. 5, Fig. 6, Fig. 7, Fig. 8, this utility model needs hold tightly working string 4 rotate make a trip preventing spraying operation time, under HYDRAULIC CONTROL SYSTEM, the piston 3-13 of radial action oil cylinder drives the motion of slips body, each slips monomer is made to gather, axial action oil cylinder 3-5 drives slips body to move downward simultaneously, is held tightly by working string 4 with coordinating of torsion conduction axis 3-10 circular conical surface of inner wall on packing element by slips body taper seat; Now well pressure acts under packing element on the lower surface of torsion conduction axis 3-7, simultaneously by the control of the liquid flow direction and pressure in hydraulic circuit, applying radial compression power to packing element 3-8, makes packing element 3-8 shrink to central axial direction, is held tightly by working string 4. In aforesaid operations process, owing to being positioned on the packing element of packing element 3-8 upper end, working string 4 is held tightly by torsion conduction axis 3-10 by slips body, and stoped packing element rubber to occur excessive glue Decrepitation Phenomena is turned in interference under well pressure effect by torsion conduction axis 3-10 on packing element, not only avoid preventer Problem of Failure, reduce simultaneously and bore diameter of preventer and working string outside dimension coordinated requirement, therefore this utility model can coordinate with the working string of sizes specification, thus improve the universal performance of preventer. This utility model is by being coated on oil crusty pancake body on the external cylindrical surface of packing element 3-8 by the isolation of packing element 3-8 and hydraulic oil medium, it is to avoid the impurity damage to the packing element 3-8 with working string 4 high speed rotating in high pressure liquid force feed medium. This utility model outwards transmits moment of torsion by the moment of torsion of rigid transmission cylinder 3-4, solves and is outwards transmitted the problem that packing element working life that moment of torsion causes is short in prior art by packing element.
Claims (8)
1. an oil field drilling well workover annular preventer, is characterized in that, described oil field drilling well workover annular preventer includes upper end cover (1), housing (2) and preventer core body (3);Described upper end cover (1) is by bolt assembly and housing (2) assembling; Described preventer core body (3) is arranged in the cavity enclosed by upper end cover (1) and housing (2), is provided with torsion transmission cylinder (3-4) of slips assembly (3-11), the packing element (3-8) vertically arranged and rigid in preventer core body (3); Described packing element (3-6) up and down two ends are respectively provided with on packing element under torsion conduction axis (3-10), packing element torsion conduction axis (3-7), on described packing element, torsion conduction axis (3-10) is hollow structure, and its inwall is the taper seat coordinated with slips assembly (3-11); It is outside that described torsion transmission cylinder (3-4) is sleeved on packing element (3-8).
2. oil field drilling well workover annular preventer according to claim 1, it is characterized in that, described preventer core body (3) is additionally provided with annular packing element oil crusty pancake assembly (3-9), described annular packing element oil crusty pancake assembly includes oil crusty pancake body and is positioned at oil crusty pancake seal head (3-9-1) at oil crusty pancake body two ends, described oil crusty pancake body is coated on the external cylindrical surface of packing element (3-6), it is positioned at the oil crusty pancake seal head of oil crusty pancake body upper end torsion transmits cylinder (3-4) and torsion conduction axis (3-10) on packing element to fix and be connected, it is positioned at the oil crusty pancake seal head assembling fixing with torsion conduction axis (3-7) under packing element of oil crusty pancake body lower end.
3. oil field drilling well workover annular preventer according to claim 1 and 2, it is characterized in that, described slips assembly (3-11) includes supporting mechanism, driving mechanism and slips body, described slips body is arranged in the top of packing element (3-8), being made up of the one group of quantity slips monomer no less than six, slips body outer surface is the taper seat mated with torsion conduction axis (3-10) hollow structure on packing element.
4. oil field drilling well workover annular preventer according to claim 3, is characterized in that, the supporting mechanism of described slips assembly (3-11) includes slips base (3-3), support bar (3-2) and a support plate (3-1); Described support bar (3-2) is evenly arranged along slips base circumferencial direction, the assembling fixing with a support plate (3-1) of its upper end, lower end assembling fixing with torsion transmission cylinder (3-4); Described slips base (3-3) is provided with one group of support bar through hole, and slips base (3-3) slides up and down along support bar (3-2) under driving mechanism drives.
5. oil field drilling well workover annular preventer according to claim 4, is characterized in that, the driving mechanism of described slips assembly (3-11) includes slips and gathers driving assembly and slips locking driving assembly; Described slips gathers one group of radial action oil cylinder (3-12) that driving assembly includes being arranged in slips base (3-3), described radial action oil cylinder (3-12) is mated with slips amount of monomer, the assembling fixing with corresponding slips monomer of the piston (3-13) of radial action oil cylinder.
6. oil field drilling well workover annular preventer according to claim 5, it is characterized in that, described slips locking drives assembly to include the one group of axial action oil cylinder (3-5) being arranged in moment of torsion transmission cylinder (3-4) sidewall, the assembling fixing with slips base (3-3) of piston rod (3-6) upper end of axial action oil cylinder.
7. oil field drilling well workover annular preventer according to claim 6, it is characterized in that, described preventer core body (3) is by being arranged in self-aligning thrust roller bearing (5) and upper end cover (1), housing (2) assembling of moment of torsion transmission cylinder (3-4) upper/lower terminal, by the roller bearing (6) and housing (2) assembling that are arranged under packing element on torsion conduction axis (3-7).
8. oil field drilling well workover annular preventer according to claim 7, is characterized in that, described oil field drilling well workover annular preventer is by the flange sealing structure of upper end cover (1) and the flange sealing structure of housing (2) and drilling equipment assembling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521025164.6U CN205297447U (en) | 2015-12-11 | 2015-12-11 | Well workover annular blowout preventer is bored in oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521025164.6U CN205297447U (en) | 2015-12-11 | 2015-12-11 | Well workover annular blowout preventer is bored in oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205297447U true CN205297447U (en) | 2016-06-08 |
Family
ID=56430493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521025164.6U Withdrawn - After Issue CN205297447U (en) | 2015-12-11 | 2015-12-11 | Well workover annular blowout preventer is bored in oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205297447U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350934A (en) * | 2015-12-11 | 2016-02-24 | 韩咏利 | Annular preventer for drilling and workover in oil field |
-
2015
- 2015-12-11 CN CN201521025164.6U patent/CN205297447U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350934A (en) * | 2015-12-11 | 2016-02-24 | 韩咏利 | Annular preventer for drilling and workover in oil field |
| CN105350934B (en) * | 2015-12-11 | 2018-09-11 | 韩咏利 | A kind of oil field drilling and repairing well annular preventer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160608 Effective date of abandoning: 20180911 |