CN201943646U - Two-stage blowout prevention tool for oil well - Google Patents
Two-stage blowout prevention tool for oil well Download PDFInfo
- Publication number
- CN201943646U CN201943646U CN2010206726828U CN201020672682U CN201943646U CN 201943646 U CN201943646 U CN 201943646U CN 2010206726828 U CN2010206726828 U CN 2010206726828U CN 201020672682 U CN201020672682 U CN 201020672682U CN 201943646 U CN201943646 U CN 201943646U
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- blowout prevention
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- oil well
- wellhead
- blowout
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Abstract
The utility model relates to the technical field of oil well workover, in particular to a two-stage blowout prevention tool for an oil well. The tool is characterized in that: a special collar and a pressure transfer adapter, the special collar and a lifting nipple, the lifting nipple and a control nut, the control nut and a control rod, and the control rod and an oil pipe pressure relief valve are all in threaded connection; the control rod is fixed to a plugging device through a positioning pin; a sealing plug is arranged outside the plugging device; the sealing plug is in threaded connection with the lifting nipple; a pressure transfer hole is formed on the lifting nipple; the lifting nipple is in threaded connection with a special suspension adapter; the seal between the special suspension adapter and a large four-way joint is achieved through a seal ring; and a heat-insulation pipe fastener is arranged at the lower end of the special suspension adapter. The two-stage blowout prevention tool achieves the purposes of preventing the blowout of the oil well and testing the pressure of different types of wellhead blowout prevention devices, and overcomes the defects in the prior art that the wellhead is needed to be changed during the pressure test of the blowout prevention device and the simple blowout prevention wellhead is made in case of blowout of the wellhead free of the blowout prevention device, leading to high risk of accidents.
Description
Technical field:
The utility model relates to a kind of oil well well workover technology field, particularly a kind of oil well twin-stage blowout prevention instrument.
Background technology:
In oil (gas) field underground work process,, be equipped with preventer for guaranteeing construction safety, but construct three, on request preventer can be installed during level Four well control risk well, can only the simple and easy Blowout prevention wellhead of seat when in case blowout takes place, the influence of wasting time and energy is robbed the spray time, causes the accident easily.Well head has been installed the well of preventer, for guaranteeing the preventer installation qualification, must carry out pressure testing to it.But (divide type well heads such as KY21/65 (250) type, the little thermal recovery type of KR21-370L4, KR21-370L4 thermal recovery type) because well head four-way difference in the actual production, has only the 250 model four-way at present, preventer is energy pressure testing (in the former well tubing hanger being installed) after installation, must be replaced with the 250 model four-way for other type well head (all be hang well head) when the pressure testing, the ability pressure testing exists many potential safety hazards and inconvenience.
The utility model content:
The technical problems to be solved in the utility model provides a kind of oil well twin-stage blowout prevention instrument, and this instrument has been realized oil well blowout prevention and the pressure testing of polytype wellhead blowout preventor.Can only the simple and easy Blowout prevention wellhead of seat when in a single day the well head that need switch well head when having overcome preventer pressure testing in the prior art and not be equipped with preventer blowout takes place, the deficiency that causes the accident easily.
Technical solution adopted in the utility model is: a kind of oil well twin-stage blowout prevention instrument, form by special box cupling, oil pipe relief valve, pressure transmission joint, control nut, control lever, lifting sub, shop bolt, blanking plug, seal plug, pressure transmission hole, big four, sealing ring, special suspension joint and heat insulation pipe thread; Be screwed connection between special box cupling and pressure transmission joint, special box cupling and lifting sub, lifting sub and control nut, control nut and control lever, control lever and the oil pipe relief valve, control lever is fixed by shop bolt and blanking plug, blanking plug is provided with seal plug outward, seal plug and lifting sub screwed connection, have pressure transmission hole on the lifting sub, lifting sub and the screwed connection of special suspension joint, seal by sealing ring between special suspension joint and the big four, special suspension joint lower end is provided with heat insulation pipe thread.
The beneficial effects of the utility model are: the utility model is owing to adopted control lever to fix by shop bolt and blanking plug, blanking plug is provided with seal plug outward, seal plug and lifting sub screwed connection, have the structure of pressure transmission hole on the lifting sub, thereby has a function of oil well blowout prevention and the pressure testing of polytype wellhead blowout preventor, the utility model is in operation process, do not need to switch four-way, avoid the operation of well head lifting heavy load, shortened the activity duration, reduce labor strength, saved operating cost, avoided the generation of gas blowout accident.
Description of drawings:
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment:
As shown in drawings, a kind of oil well twin-stage blowout prevention instrument is made up of special box cupling 1, oil pipe relief valve 2, pressure transmission joint 3, control nut 4, control lever 5, lifting sub 6, shop bolt 7, blanking plug 8, seal plug 9, pressure transmission hole 10, big four 11, sealing ring 12, special suspension joint 13 and heat insulation pipe thread 14; Special box cupling 1 and pressure transmission joint 3, special box cupling 1 and lifting sub 6, lifting sub 6 and control nut 4, control nut 4 and control lever 5, be screwed connection between control lever 5 and the oil pipe relief valve 2, control lever 5 is fixing with blanking plug 8 by shop bolt 7, the blanking plug 8 outer seal plugs 9 that are provided with, seal plug 9 and lifting sub 6 screwed connections, have pressure transmission hole 10 on the lifting sub 6, lifting sub 6 and 13 screwed connections of special suspension joint, seal by sealing ring 12 between special suspension joint 13 and the big four 11, special suspension joint 13 lower ends are provided with heat insulation pipe thread 14.
For the well that preventer is not installed, former well well head four-way and casing flange pipe nipple connect, when in construction, if the blowout omen taking place,, below the heat insulation pipe thread 14 of the utility model, use the qualified back of tubing string coupling screwed connection G.I.H in dissimilar change buttons and the well according to tubing string difference in the well, with 2 dextrorotation of oil pipe relief valve, drive control lever 5, blanking plug 8 is entered in the seal plug 9, make the oil pipe sealing, finish closing well in the oil pipe, finish the spray work of robbing.
The well that needs pressure testing for preventer, after tripping out the interior all sucker rods of well, the well head production tree is laid down, according to tubing string difference in the well, below the heat insulation pipe thread 14 of the utility model, use dissimilar change buttons, the qualified back of screwed connection G.I.H, again lifting sub 6 is laid down, it is qualified that preventer and well head four-way are connected with 12 well head screws, again lifting sub 6 is lowered to special suspension joint 13 and is connected, at last preventer cuts out, test medium (all being clear water at present) is squeezed into by pressure transmission hole 10 by pressure transmission joint 3 and is returned out (it being closed 2 dextrorotation of oil pipe relief valve before the pressure testing), when pressure transmission hole 10 was full of test medium in the ram block annular space, hydraulic test pump rises to press finished work pressure test.
When preventer pressure testing in winter is constructed, very inconvenient, easily freeze problem at pipeline, pressure transmission joint 3 on the special box cupling 1 is replaced with the special joint that mates with the workover rig hydraulic line, utilize the workover rig hydraulic system to give preventer pressure testing (the pressure testing process is the same with front pressure testing method of operating), freeze stifled, the problem of hurting sb.'s feelings with regard to having solved pipeline like this, improved efficiency of construction, guaranteed safety.
Suspended portion can be fit to polytype well head (KY21/65 (250) type, the little thermal recovery type of KR21-370L4, KR21-370L4 thermal recovery type etc.) in the four-way of the present utility model, below the heat insulation pipe thread 14 in the four-way in the suspended portion, can use tubing string coupling (screwed connection) in dissimilar change buttons and the well, the sealing oil sets annular space, can finish constructions such as well-flushing, pressure testing, The field is very convenient reliable.
Claims (1)
1. an oil well twin-stage blowout prevention instrument is made up of special box cupling (1), oil pipe relief valve (2), pressure transmission joint (3), control nut (4), control lever (5), lifting sub (6), shop bolt (7), blanking plug (8), seal plug (9), pressure transmission hole (10), big four (11), sealing ring (12), special suspension joint (13) and heat insulation pipe thread (14); It is characterized in that: special box cupling (1) and pressure transmission joint (3), special box cupling (1) and lifting sub (6), lifting sub (6) and control nut (4), control nut (4) and control lever (5), be screwed connection between control lever (5) and the oil pipe relief valve (2), control lever (5) is fixing by shop bolt (7) and blanking plug (8), the outer seal plug (9) that is provided with of blanking plug (8), seal plug (9) and lifting sub (6) screwed connection, have pressure transmission hole (10) on the lifting sub (6), lifting sub (6) and special suspension joint (13) screwed connection, seal by sealing ring (12) between special suspension joint (13) and the big four (11), special suspension joint (13) lower end is provided with heat insulation pipe thread (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206726828U CN201943646U (en) | 2010-12-22 | 2010-12-22 | Two-stage blowout prevention tool for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206726828U CN201943646U (en) | 2010-12-22 | 2010-12-22 | Two-stage blowout prevention tool for oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201943646U true CN201943646U (en) | 2011-08-24 |
Family
ID=44470995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206726828U Expired - Fee Related CN201943646U (en) | 2010-12-22 | 2010-12-22 | Two-stage blowout prevention tool for oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201943646U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996092A (en) * | 2012-11-07 | 2013-03-27 | 宝鸡瑞林石油机电设备有限责任公司 | Hydraulic-control double-stage well test blowout preventer |
| CN103382830A (en) * | 2012-05-01 | 2013-11-06 | 韦特柯格雷英国有限公司 | Plug installation system and method |
| CN103982155A (en) * | 2014-05-23 | 2014-08-13 | 西南石油大学 | Inclinable experiment well-mouth sealing device |
| CN104832123A (en) * | 2015-04-28 | 2015-08-12 | 中国石油天然气股份有限公司 | Manual blowout prevention device |
-
2010
- 2010-12-22 CN CN2010206726828U patent/CN201943646U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103382830A (en) * | 2012-05-01 | 2013-11-06 | 韦特柯格雷英国有限公司 | Plug installation system and method |
| CN102996092A (en) * | 2012-11-07 | 2013-03-27 | 宝鸡瑞林石油机电设备有限责任公司 | Hydraulic-control double-stage well test blowout preventer |
| CN102996092B (en) * | 2012-11-07 | 2015-02-11 | 宝鸡瑞林石油机电设备有限责任公司 | Hydraulic-control double-stage well test blowout preventer |
| CN103982155A (en) * | 2014-05-23 | 2014-08-13 | 西南石油大学 | Inclinable experiment well-mouth sealing device |
| CN103982155B (en) * | 2014-05-23 | 2016-02-10 | 西南石油大学 | A kind of tiltable experiment well mouth sealing device |
| CN104832123A (en) * | 2015-04-28 | 2015-08-12 | 中国石油天然气股份有限公司 | Manual blowout prevention device |
| CN104832123B (en) * | 2015-04-28 | 2017-05-10 | 中国石油天然气股份有限公司 | Manual blowout prevention device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20111222 |