CN202417383U - Wellhead blowout prevention sealing device - Google Patents
Wellhead blowout prevention sealing device Download PDFInfo
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- CN202417383U CN202417383U CN2011205606255U CN201120560625U CN202417383U CN 202417383 U CN202417383 U CN 202417383U CN 2011205606255 U CN2011205606255 U CN 2011205606255U CN 201120560625 U CN201120560625 U CN 201120560625U CN 202417383 U CN202417383 U CN 202417383U
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- packing
- blowout prevention
- sealing device
- cylinder body
- well head
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Abstract
The utility model provides a novel wellhead blowout prevention sealing device, and aims to solve the problems that overflow quantity is large, an instrument difficultly descends to a well, the structure is long and complicated, field staff inconveniently operate and the like in the conventional wellhead blowout prevention sealing device. The wellhead blowout prevention sealing device comprises a cylinder body and a piston rod, a first packing and a first packing pad which are arranged in the cylinder body, wherein the lower end of the cylinder body is connected with a blowout prevention pipe; the first packing and the first packing pad are arranged at the lower end of the piston rod in sequence; a limit step structure is arranged and a step closed cavity is formed between the cylinder body and the piston rod; and a perforative cavity is formed on the cylinder body along a central axis and used for accommodating a steel cable. The wellhead blowout prevention sealing device has the advantages that a sealing effect is good, the instrument is smoothly lifted and lowered, zero overflow quantity can be realized during a test, and the device has a simple structure and is reasonable in design and convenient to operate, use and detach.
Description
Technical field
The utility model belongs to field of petroleum exploitation, relate in particular to a kind of when in well testing, descending wireline test instrument through the blowout prevention sealing device of well head transition region.
Background technology
At present the well head blowout prevention sealing device that in well testing, generally uses of each elephant of China mostly adopts the screw-in of screw buckle to compress the packing pad to strengthen sealing effectiveness; Yet in the use of reality; Tend to occur that spillway discharge is big, instrument is gone into the well a series of problems such as difficulty, brought great inconvenience for on-the-spot operating personnel.Down during wireline test, the way that adopts well head greasing sealing device to seal well head is arranged also in well logging, yet though this way can satisfy the environment for use at scene; But because its structure is oversize; Structure is comparatively complicated in addition, and during working expenditure, effort, difficulty and intensity are all bigger; Be difficult to the requirement that reaches desirable, in well testing, seldom promoted, adopt.
At present;, instrument big to the spillway discharge problems such as difficulty and site operation personnel be not convenient of going into the well have proposed new challenge; The utility model provides a kind of novel well head blowout prevention sealing device for this reason and come effectively control or reduce spillway discharge, to reach the purpose that strengthens sealing effectiveness.
Summary of the invention
The utility model provides a kind of novel well head blowout prevention sealing device, purpose is to solve that existing well head blowout prevention sealing device spillway discharge is big, instrument is gone into the well difficulty, structure length, complex structure, Field Force are operated problems such as not convenient.
The technical solution of the utility model is:
Well head blowout prevention sealing device; Its lower end is connected with lubricator, and said well head blowout prevention sealing device comprises cylinder body and the piston rod, first packing and the first packing pad that are arranged in the cylinder body, and the cylinder body lower end is connected with lubricator; Said first packing and the first packing pad are set in turn in piston-rod lower end; Be provided with the limited step structure between said cylinder body and the piston rod and form the step closed cavity, cylinder body is provided with the cavity that runs through along central axis, and said cavity is used to throw in steel wire cable.
Above-mentioned well head blowout prevention sealing device also comprises the overflow mechanism that is connected with the cylinder body upper end, and above-mentioned overflow mechanism comprises water storage cavity, and the sidewall of above-mentioned water storage cavity is provided with delivery port.
Above-mentioned well head blowout prevention sealing device also comprises the choked flow decompressor that is connected with the cylinder body lower end, and above-mentioned choked flow decompressor comprises choke tube, is communicated with cylinder body on the above-mentioned choke tube, is communicated with lubricator down.
Above-mentioned overflow mechanism also comprises second packing and the second packing pad, pressure cap, and the above-mentioned second packing pad is positioned at the water storage cavity top, and above-mentioned second packing is arranged at second packing pad top, and above-mentioned pressure cap is arranged at second packing top.
Above-mentioned choked flow decompressor also comprises blowout prevention joint, top board, pilot cover, damping spring; Be connected with cylinder body on the above-mentioned blowout prevention joint; Following and top board is connected, and above-mentioned blowout prevention joint and top board surround cavity, and above-mentioned choke tube is positioned at cavity inside; The top board below is fixed with the pilot cover, and above-mentioned pilot cover is outside equipped with damping spring.
Above-mentioned packing material is a fluorubber, and the packing cushion material is hard nylon, continue your hardness of that hardness greater than packing that continues of packing pad.
The soffit of the upper surface of above-mentioned packing and packing pad has adopted chamfer design.
Above-mentioned well head blowout prevention sealing device also comprises the greasing pressure testing device, and above-mentioned greasing pressure testing device is communicated with the step closed cavity.
Above-mentioned greasing pressure testing device includes grease gun, and above-mentioned grease gun is provided with snap ring.
The advantage of the utility model is: sealing effectiveness is good, and it is smooth to raise and decentralize instrument, when test, can realize no spillway discharge, and is simple in structure, reasonable in design, operation, use, convenient disassembly.
Description of drawings
Fig. 1 is a well head blowout prevention schematic diagram of sealing device; Fig. 1 a is the A-A sectional drawing of Fig. 1;
Fig. 2 is the limited step of cylinder body-piston rod;
Fig. 3 is packing, packing mat structure sketch map.
Including: 1. First gland? 2 choke decompression device? 3. Overflow device? 4. Greasing pressure test device 5. Cylinder? 6. Rod? 7 first packing? 8. No. a packing pad? 9. limit stepped structure? 10. stairs enclosed cavity? 11. pump connections? 12 second gland? 13. pressure cap? 14. storage chamber? 15 second packing? 16 The second packing pad? 17. outlet? 18. hose connector? 19. rubber tube? 20. buffer spring? 21 wire cable? 22. BOP connector? 23 roof? 24. pilot pressure sleeve? 25 . choke tube? 26. damping spring 27. overflow adapter? 28. third packing? 29. third packing pad? 30. BOP adapter? 31.O fluorine rubber ring.
The specific embodiment
Below in conjunction with Fig. 1, Fig. 1 a the structure of this utility model is described:
Well head blowout prevention sealing device is used for sealing the transition region of well head, and the below of well head blowout prevention sealing device is connected with lubricator; Connected mode is a taper pipe thread tubing thread made in U.S.A; Said well head blowout prevention sealing device comprises cylinder body 5 and the piston rod 6, first packing 7 and the first packing pad 8 that are arranged in the cylinder body 5, and cylinder body 5 lower ends are connected with lubricator, and said first packing 7 and the first packing pad 8 are set in turn in piston rod 6 lower ends; Said cylinder body 5 seals with the mode of piston rod 6 through 31 radial seals of O type fluorine rubber ring; Be provided with limited step structure 9 between said cylinder body 5 and the piston rod 6 and form step closed cavity 10, the soffit of step closed cavity 10 is step surfaces of piston rod 6, and this step surface has adopted the design of 18 ° of chamferings; As shown in Figure 2, come further to reach the purpose of decompression; Cylinder body 5 is provided with the cavity that runs through along central axis, is used to throw in steel wire cable 21.In order to realize better sealing; Also can set up the 3rd packing 28 and the 3rd packing pad 29 in piston rod 6 upper ends; The 3rd packing 28 and the 3rd packing pad 29 are connected with piston rod 6 through blowout prevention switching 30; First sealing shroud 1 is set up in the 3rd packing 28 and the 3rd packing pad 29 outsides, and blowout prevention switching 30 is threaded with cylinder body 5, first sealing shroud 1.
Said well head blowout prevention sealing device also comprises overflow mechanism 3, is used for the liquid that overflows is discharged.Cylinder body 5 upper ends adopt the method for O type fluorine rubber ring 31 radial seals to be threaded through overflow switching 27 and overflow mechanism 3; Described overflow mechanism 3 comprises water storage cavity 14, and the sidewall of said water storage cavity 14 is provided with delivery port 17, the up face ejection of anti-sealing; And flow out from the side.Delivery port 17 and hose coupling 18 welding, hose coupling 18 other ends are connected with rubber tube 19, and liquid is drawn from the side, make things convenient for site operation personnel's operation.The soffit of overflow switching 27 and the upper surface of the 3rd packing 28 agree with.
Said well head blowout prevention sealing device also comprises choked flow decompressor 2, mainly is used for choked flow decompression, and choked flow decompressor 2 is threaded with the method for cylinder body 5 lower ends employing O type fluorine rubber ring 31 radial seals; Said choked flow decompressor 2 comprises choke tube 25; Be communicated with cylinder body on the said choke tube 25, be communicated with lubricator down, utilize the liquid flow pressure reduction between choke tube 25 and the steel wire cable 21; Form very big local pressure loss, reach the purpose of choked flow decompression.
Be used for putting put instrument steel wire cable 21 successively through the inside of overflow mechanism 3, cylinder body 5 and choked flow decompressor 2.
Described overflow mechanism 3 also comprises second sealing shroud 12, second packing 15 and the second packing pad 16, pressure cap 13; Pressure cap 13 is threadedly connected to second sealing shroud, 12 upper ends; Said second packing 15 and the second packing pad 16 are positioned at pressure cap 13 belows, water storage cavity 14 tops; The upper surface of pressure cap 13 soffits and second packing 15 agrees with, and the design of second packing 15 and the second packing pad 16 reduces effectively or controlled spillway discharge, and described pressure cap 13 tops also are provided with buffer spring 20; Pressure cap 13 is connected through the helicla flute connected mode with buffering spring 20, is used to protect the steel wire cable 21 of transferring.
Said choked flow decompressor 2 also comprises blowout prevention joint 22, top board 23, pilot cover 24, damping spring 26, is threaded with cylinder body 5 on the said blowout prevention joint 22, comes pretension first packing 7 and the first packing pad 8 through the screw-in amount of screw thread, to reach the state of pretension.Blowout prevention joint 22 times and top board 23 are connected, and said blowout prevention joint 22 surrounds cavity with top board 23, is used for weight reduction, and said choke tube 25 is positioned at cavity inside, and top board 23 belows are fixed with pilot cover 24, and said pilot cover 24 is outside equipped with damping spring 26.Pilot cover 24 is welded on the top board 23, blowout prevention joint 22 and top board 23 welding, and choke tube 25 welding are fixing and pass top board 23, are welded with the mechanical strength that helps stiffening device.Pilot cover 24 and damping spring 26 be through fastening on plain washer and the hexagonal fillister head screw, avoids the impact of instrument and collide with.
Said packing material is a fluorubber, and your hardness that continues of fluorubber is the 75-85 degree, is advisable with 80 degree; The packing cushion material is hard nylon, and your hardness that continues of packing pad is the 85-90 degree, is advisable continue your hardness of that hardness greater than packing that continues of packing pad with 90 degree.The soffit of the upper surface of described first packing 7, second packing 15, the 3rd packing 28 and the first packing pad 8, the second packing pad 16, the 3rd packing pad 29 has adopted chamfer design, is advisable with 18 degree, and is as shown in Figure 3.
Said well head blowout prevention sealing device also comprises known greasing pressure testing device 4, is used to provide exterior power source, and said greasing pressure testing device 4 is communicated with step closed cavity 10 through pump joint 11.Said greasing pressure testing device 4 includes grease gun; Described grease gun Φ 54 thin neck places are provided with the snap ring structure; Articulate reliably with the link of lubricator welding, pump joint 11 adopts the mode of end face seal to be threaded with greasing pressure testing device 4 through O type fluorine rubber ring 31.
During concrete the use, after instrument is rendered to suitable position, pressure cap 13 is screwed down, compresses second packing 15 and the second packing pad, 16, the second packings 15 and the second packing pad 16 and hold steel wire cable 21 tightly.The reverse rotation pressure cap unclamps packing, realizes normally raising and decentralizing of instrument, thereby effectively raises the service efficiency of measuring apparatus.This well head blowout prevention sealing device is particularly useful for the less allocation process test of injection allocation amount.
Greasing pressure testing device 4 provides exterior power source; Output high pressure sealing fat; Cylinder body 5 utilizes limited step structure 9 and O type fluorine rubber ring 31 to form step closed cavity 10 with piston rod 6, is used for storing high pressure sealing fat, promotes piston rod 6 actings; Supercharging is pressed on first packing 7 and the first packing pad 8 of steel wire cable 21 outsides, plays the effect of sealing well head.
Claims (9)
1. well head blowout prevention sealing device; Its lower end is connected with lubricator; It is characterized in that: said well head blowout prevention sealing device comprises cylinder body and the piston rod, first packing and the first packing pad that are arranged in the cylinder body; The cylinder body lower end is connected with lubricator, and said first packing and the first packing pad are set in turn in piston-rod lower end, is provided with the limited step structure between said cylinder body and the piston rod and forms the step closed cavity; Cylinder body is provided with the cavity that runs through along central axis, and said cavity is used to throw in steel wire cable.
2. well head blowout prevention sealing device according to claim 1 is characterized in that: said well head blowout prevention sealing device also comprises the overflow mechanism that is connected with the cylinder body upper end, and described overflow mechanism comprises water storage cavity, and the sidewall of said water storage cavity is provided with delivery port.
3. well head blowout prevention sealing device according to claim 1 and 2; It is characterized in that: said well head blowout prevention sealing device also comprises the choked flow decompressor that is connected with the cylinder body lower end; Said choked flow decompressor comprises choke tube, is communicated with cylinder body on the said choke tube, is communicated with lubricator down.
4. well head blowout prevention sealing device according to claim 3; It is characterized in that: described overflow mechanism also comprises second packing and the second packing pad, pressure cap; The said second packing pad is positioned at the water storage cavity top; Said second packing is arranged at second packing pad top, and said pressure cap is arranged at second packing top.
5. well head blowout prevention sealing device according to claim 4; It is characterized in that: said choked flow decompressor also comprises blowout prevention joint, top board, pilot cover, damping spring, is connected with cylinder body on the said blowout prevention joint, and following and top board is connected; Said blowout prevention joint and top board surround cavity; Said choke tube is positioned at cavity inside, and the top board below is fixed with the pilot cover, and said pilot cover is outside equipped with damping spring.
6. well head blowout prevention sealing device according to claim 5 is characterized in that: said packing material is a fluorubber, and the packing cushion material is hard nylon, continue your hardness of that hardness greater than packing that continues of packing pad.
7. well head blowout prevention sealing device according to claim 6 is characterized in that: the soffit of the upper surface of described packing and packing pad has adopted chamfer design.
8. well head blowout prevention sealing device according to claim 7 is characterized in that: said well head blowout prevention sealing device also comprises the greasing pressure testing device, and said greasing pressure testing device is communicated with the step closed cavity.
9. well head blowout prevention sealing device according to claim 8 is characterized in that: said greasing pressure testing device includes grease gun, and described grease gun is provided with snap ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205606255U CN202417383U (en) | 2011-12-19 | 2011-12-19 | Wellhead blowout prevention sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205606255U CN202417383U (en) | 2011-12-19 | 2011-12-19 | Wellhead blowout prevention sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202417383U true CN202417383U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205606255U Expired - Lifetime CN202417383U (en) | 2011-12-19 | 2011-12-19 | Wellhead blowout prevention sealing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202417383U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409991A (en) * | 2011-12-19 | 2012-04-11 | 西安思坦仪器股份有限公司 | Wellhead blowout prevention sealing device |
| CN104912510A (en) * | 2015-04-27 | 2015-09-16 | 大庆宏测技术服务有限公司 | Overflow reinjection blowout prevention system of injection well |
| CN105064945A (en) * | 2015-07-21 | 2015-11-18 | 大庆庆辉机械设备有限公司 | Testing collecting reinjection full-closed blowout preventer |
| CN105625988A (en) * | 2014-11-03 | 2016-06-01 | 中国石油天然气股份有限公司 | Testing and deploying system of high-pressure separated injection well and mounting method of system |
| CN107611918A (en) * | 2017-10-25 | 2018-01-19 | 中国海洋石油总公司 | Plug-in cable sealing device |
-
2011
- 2011-12-19 CN CN2011205606255U patent/CN202417383U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409991A (en) * | 2011-12-19 | 2012-04-11 | 西安思坦仪器股份有限公司 | Wellhead blowout prevention sealing device |
| CN105625988A (en) * | 2014-11-03 | 2016-06-01 | 中国石油天然气股份有限公司 | Testing and deploying system of high-pressure separated injection well and mounting method of system |
| CN105625988B (en) * | 2014-11-03 | 2018-04-03 | 中国石油天然气股份有限公司 | A kind of the test mixing system and its installation method of high pressure dispensing well |
| CN104912510A (en) * | 2015-04-27 | 2015-09-16 | 大庆宏测技术服务有限公司 | Overflow reinjection blowout prevention system of injection well |
| CN104912510B (en) * | 2015-04-27 | 2017-11-07 | 大庆宏测技术服务有限公司 | Injection well overflow re-injection spraying-preventing system |
| CN105064945A (en) * | 2015-07-21 | 2015-11-18 | 大庆庆辉机械设备有限公司 | Testing collecting reinjection full-closed blowout preventer |
| CN107611918A (en) * | 2017-10-25 | 2018-01-19 | 中国海洋石油总公司 | Plug-in cable sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |