CN210714573U - Automatic blowout preventer for polished rod breaking-off wellhead - Google Patents
Automatic blowout preventer for polished rod breaking-off wellhead Download PDFInfo
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- CN210714573U CN210714573U CN201921019622.3U CN201921019622U CN210714573U CN 210714573 U CN210714573 U CN 210714573U CN 201921019622 U CN201921019622 U CN 201921019622U CN 210714573 U CN210714573 U CN 210714573U
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Abstract
The utility model provides an automatic blowout preventer of polished rod disconnected well head that takes off, it includes: the top wall and the bottom wall of the shell are respectively provided with a first perforation and a second perforation for the polish rod to pass through; the sliding part is arranged in the shell, a supporting ball is arranged on the sliding part, an inner cavity is arranged in the sliding part, a sealing ball and a first elastic part are arranged in the inner cavity, the sealing ball is pushed by the first elastic part to prop against the top wall of the shell, and a second elastic part is arranged between the right side wall of the sliding part and the shell; under the state that the polish rod is not disconnected, the sliding part and the supporting ball are positioned on the right side of the polish rod, and the supporting ball is pushed by the second elastic part to be in contact with the polish rod; under the state that the polish rod is disconnected, the supporting ball slides towards the left under the pushing of the second elastic piece until the supporting ball props against the left side wall of the shell, the inner cavity is aligned and communicated with the first through hole, and the sealing ball blocks the first through hole under the pushing of the first elastic piece. The utility model discloses can solve when oil well pressure is low blowout preventer can not seal, and the long-term wearing and tearing of ball sealer can not play the problem of sealed effect.
Description
Technical Field
The utility model relates to an oil recovery blowout preventer, especially a polished rod takes off well head automatic blowout preventer absolutely.
Background
Along with the increase of the number of heavy oil wells and the influence of comprehensive factors such as high water content, strong production, well deviation and the like, the frequency of polish rod breaking and disengaging of the oil wells gradually rises. The polish rod and the packing in the sealing box form a dynamic sealing system, and once the polish rod is broken off and separated from a wellhead, a blowout can be formed under the return pressure of an oil collecting flow in a well or a single well. The oil well with high formation pressure can spray a large amount of oil vapor water after the polish rod is broken off, and is very easy to cause large-area environmental pollution.
The polish rod breaks hair and generates blowout accidents, the negative effects of which are great and mainly expressed as follows: (1) the load of a dragging system of the oil pumping unit is increased instantly, the protector cannot act in time, and the motor is burnt due to instant overload; (2) the production recovery difficulty of the oil well is high after the polish rod is broken and stripped, and the crude oil production is seriously influenced; (3) a great deal of oil and water is gushed out from the blowout and toxic and harmful combustible gas is possibly released, so that serious environmental pollution and potential safety hazard are caused.
To solve these problems, it is necessary to develop an effective method and means for preventing blowout due to rod breakage. There are two problems with current blowout preventers: (1) the sealing of the blowout preventer is against the pressure of the oil well, and when the pressure of the oil well is small, the sealing ball cannot play a role in plugging; (2) in the course of the work, the sealing ball constantly contacts with the polished rod for the sealing ball surface constantly wears, and the sealed effect of during operation is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an automatic blowout preventer of polished rod disconnected well head that takes off to solve when oil well pressure is low blowout preventer can not seal, reach the long-term wearing and tearing of ball sealer and can not play the problem of sealed effect.
In order to achieve the above object, the utility model provides an automatic blowout preventer of polished rod disconnected well head that takes off, it includes: the hollow shell is provided with a top wall, a bottom wall, a left side wall and a right side wall, and a first perforation and a second perforation for a polish rod to pass through are respectively arranged on the top wall and the bottom wall; the sliding part can be slidably arranged in the shell, a supporting ball is arranged on the left side wall of the sliding part, an inner cavity with an open top is arranged in the sliding part, a sealing ball and a first elastic part positioned below the sealing ball are arranged in the inner cavity, the sealing ball is pushed by the first elastic part to prop against the top wall of the shell, and a second elastic part is arranged between the right side wall of the sliding part and the right side wall of the shell; under the state that the polish rod is not disconnected, the sliding piece and the supporting ball are positioned on the right side of the polish rod, and the supporting ball is pushed by the second elastic piece to be in contact with the polish rod; under the state that the polish rod is disconnected, the supporting ball slides towards the left under the pushing of the second elastic piece until the supporting ball abuts against the left side wall of the shell, the inner cavity is aligned and communicated with the first through hole, and the sealing ball blocks the first through hole under the pushing of the first elastic piece.
The polished rod breaking and tripping wellhead automatic blowout preventer further comprises an upper flange and a lower flange, wherein the upper flange and the lower flange are used for being connected with a wellhead device, the upper flange is located above the shell and fixedly connected with the top wall of the shell, the lower flange is located below the shell and fixedly connected with the bottom wall of the shell.
The polish rod breaking and tripping wellhead automatic blowout preventer is characterized in that the inner cavity penetrates through the sliding piece in the vertical direction, and is communicated with the second through hole in the polish rod breaking and tripping state.
The automatic wellhead blowout preventer is characterized in that the lower part of the inner cavity is provided with an annular step, the lower end of the first elastic part abuts against the annular step, and the upper end of the first elastic part abuts against the sealing ball.
The automatic wellhead blowout preventer for polished rod disconnection comprises a sliding piece, a pressure cap, a positioning groove and a support ball, wherein the sliding piece is provided with a through hole on the left side wall, the pressure cap extends into the through hole, the pressure cap is provided with a hemispherical groove on the left side wall, the hemispherical groove is communicated with the through hole and surrounds the through hole to form the positioning groove, and the support ball can be arranged in the positioning groove in a rolling manner.
The automatic wellhead blowout preventer is characterized in that the sliding piece divides the interior of the shell into a left chamber and a right chamber, the sliding piece is provided with a communication hole, the communication hole penetrates through the sliding piece in the horizontal direction, and the communication hole communicates the left chamber, the right chamber and the inner cavity of the sliding piece.
The automatic wellhead blowout preventer is characterized in that the casing is composed of a jacket and an adjusting nut, the right side of the jacket is provided with an opening, the adjusting nut is arranged on the right side of the jacket and blocks the opening, the adjusting nut is the right side wall of the casing, and the adjusting nut is in threaded connection with the jacket.
The automatic wellhead blowout preventer is characterized in that the first through hole is a tapered hole, and the diameter of the tapered hole is gradually enlarged from top to bottom.
The automatic wellhead blowout preventer is broken by the polish rod, wherein the support balls are nylon balls.
The automatic wellhead blowout preventer is broken by the polish rod, wherein the first elastic part and the second elastic part are both springs.
The utility model discloses an automatic blowout preventer of well head is taken off absolutely to polished rod's characteristics and advantage are:
1. the utility model discloses an automatic blowout preventer of polished rod breaking-off well head, the elastic force of the first elastic component is used as the sealing pressure of the sealing ball, even when the well head pressure is low, the sealing ball can also plug the first perforation under the push of the first elastic component; in addition, because the sealing ball is not contacted with the polished rod, the sealing ball can not be abraded, therefore, the sealing of the sealing ball is reliable, the sealing effect is good, and the problem that the sealing effect can not be realized due to the abrasion of the sealing ball can not occur, therefore, the blowout preventer can effectively avoid the blowout accident caused by the breakage and the falling off of the polished rod;
2. the utility model discloses an automatic blowout preventer of well head is taken off absolutely to the polished rod, simple structure, easy dismounting can avoid the emergence of blowout accident and the environmental pollution who brings from this, reduces the worker and patrols the well and administers the intensity of labour who pollutes.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1 is a schematic view of the automatic wellhead blowout preventer with polish rod broken and disengaged according to the present invention in a state that the polish rod is not broken and disengaged;
FIG. 2 is a schematic view of the automatic wellhead blowout preventer with polish rod breaking off in the state of polish rod breaking off;
FIG. 3 is a schematic view of one embodiment of a slider of the present invention;
FIG. 4 is a schematic view of the press cap on the slider;
FIG. 5 is a schematic view of the support ball disposed in the detent.
Main element number description:
1. a housing;
11. a top wall; 12. a bottom wall; 13. a left side wall; 14. a right side wall; 15. a first perforation; 16. a second perforation;
17. a jacket; 18. adjusting the nut;
2. a slider; 21. an inner cavity; 22. an annular step; 23. a communicating hole; 24. a through hole;
3. a support ball; 4. a sealing ball; 5. a first elastic member; 6. a second elastic member;
7. an upper flange; 8. a lower flange; 9. pressing the cap; 10. positioning a groove;
100. a polish rod.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
As shown in fig. 1 and 2, the present invention provides an automatic blowout preventer for a polish rod breaking-off wellhead, which is fixed on a wellhead and used for preventing blowout after a polish rod 100 is broken-off, and comprises a hollow housing 1 and a sliding member 2, wherein the housing 1 has a top wall 11, a bottom wall 12, a left side wall 13 and a right side wall 14, the top wall 11 and the bottom wall 12 are respectively provided with a first perforation 15 and a second perforation 16 for a polish rod 100 to pass through, that is, the first perforation 15 and the second perforation 16 are communicated to form a polish rod hole for the polish rod 100 to pass through;
the sliding part 2 is arranged in the shell 1 in a left-right sliding manner, a supporting ball 3 is arranged on the left side wall of the sliding part 2, the surface of the supporting ball 3 is smooth, an inner cavity 21 with an open top is arranged in the sliding part 2, a sealing ball 4 (also called as a valve ball) and a first elastic part 5 positioned below the sealing ball 4 are arranged in the inner cavity 21, the sealing ball 4 is pushed by the first elastic part 5 to prop against the top wall 11 of the shell 1, and a second elastic part 6 is arranged between the right side wall of the sliding part 2 and the right side wall 14 of the shell 1, namely the second elastic part 6 is also positioned in the shell 1;
when in use, under the state that the polish rod 100 is not disconnected, the sliding part 2 and the supporting ball 3 are positioned at the right side of the polish rod 100, and the supporting ball 3 on the sliding part 2 is pushed by the second elastic part 6 to be contacted with the polish rod 100, namely, a reasonable pressing force is formed between the supporting ball 3 and the polish rod 100, but the pressing force is small, so that the normal work of the polish rod 100 is not influenced, and the polish rod 100 is not abraded; in the state that the polish rod 100 is disconnected, the position occupied by the polish rod 100 in the shell 1 (i.e. the polish rod hole) is vacant, the support ball 3 loses support, the support ball 3 and the sliding part 2 slide towards the left under the pushing of the second elastic part 6 until the support ball 3 abuts against the left side wall 13 of the shell 1, when the support ball 3 abuts against the left side wall 13 of the shell 1, the seal ball 4 and the first elastic part 5 move to the position of the polish rod hole, the inner cavity 21 is aligned with and communicated with the first through hole 15, and the seal ball 4 blocks the first through hole 15 under the pushing of the first elastic part 5, so that the channel of crude oil overflow is blocked, and blowout is prevented.
The utility model discloses an automatic blowout preventer of well head is taken off absolutely to the polished rod, the elastic force of first elastic component 5 is as the sealing pressure of ball sealer 4, even when well head pressure is low, ball sealer 4 also can be under the promotion of first elastic component 5 the first perforation 15 of shutoff, because ball sealer 4 not with polished rod 100 contact, ball sealer 4 can not wear and tear, therefore ball sealer 4 is sealed reliable, sealed effectual, can not appear because of the problem that ball sealer 4 wearing and tearing can not be sealed, consequently the utility model discloses a blowout preventer can effectively avoid taking off the blowout accident that takes place because of the polished rod is disconnected.
As shown in fig. 1, further, the polish rod breaking wellhead automatic blowout preventer further comprises an upper flange 7 and a lower flange 8 for connecting with a wellhead device, wherein the upper flange 7 is located above the housing 1, the upper flange 7 is fixedly connected with a top wall 11 of the housing 1, the lower flange 8 is located below the housing 1, and the lower flange 8 is fixedly connected with a bottom wall 12 of the housing 1, for example, the upper flange 7 and the lower flange 8 are welded with the housing 1. Through setting up upper flange 7 and lower flange 8, be convenient for be connected blowout preventer and well head.
Further, the first through hole 15 is a tapered hole, and the diameter of the tapered hole is gradually enlarged from top to bottom, that is, the top wall 11 of the housing 1 corresponds to a valve seat, and the valve seat and the sealing ball 4 (valve ball) together form a check valve. By providing the first bore 15 as a conical bore, the sealing ball 4 is facilitated to seal off the first bore 15.
Further, the first elastic member 5 and the second elastic member 6 are both cylindrical springs, the extending direction of the first elastic member 5 is a vertical direction, and the extending direction of the second elastic member 6 is a horizontal direction.
As shown in fig. 1, 2 and 3, in a preferred embodiment, the inner cavity 21 penetrates the sliding member 2 in the vertical direction, and in the disconnected state of the polish rod 100, the inner cavity 21 communicates with the second through hole 16, that is, the inner cavity 21 communicates with the inside of the oil well, so that the oil well pressure and the elastic force of the first elastic member 5 together serve as the sealing pressure of the sealing ball 4, so that the sealing ball 4 more reliably seals the first through hole 15.
As shown in fig. 1 and 3, when the inner cavity 21 penetrates the sliding member 2, in order to provide support for the first elastic member 5, an annular step 22 is provided in the inner cavity 21, the annular step 22 is located at a lower portion of the inner cavity 21, a lower end of the first elastic member 5 abuts against the annular step 22, and an upper end of the first elastic member 5 abuts against the sealing ball 4.
As shown in fig. 3, 4 and 5, in an embodiment as shown in fig. 1, a through hole 24 is formed on a left side wall of the slider 2, an inner wall surface of the through hole 24 is an arc surface, a pressing cap 9 extends into the through hole 24, and a hemispherical groove is formed on the left side wall of the pressing cap 9, the hemispherical groove is communicated with the through hole 24 and encloses the positioning groove 10, the shape of the positioning groove 10 matches the shape of the supporting ball 3, and the positioning groove 10 is more than hemispherical and is more than hemispherical to prevent the supporting ball 3 from falling out, the supporting ball 3 can be rollably disposed in the positioning groove 10, so that when the supporting ball 3 contacts the polish rod 100 (as shown in fig. 1), as the polish rod 100 moves up and down, the supporting ball 3 can roll in the positioning groove 10, which is equivalent to a roller or a rolling ball, so that the polish rod 100 can move.
Further, the support balls 3 are nylon balls to reduce the adverse effect of the support balls 3 on the polished rod 100.
Further, the sliding member 2 divides the interior of the housing 1 into a left chamber and a right chamber, the sliding member 2 is provided with a communication hole 23, the communication hole 23 penetrates through the sliding member 2 in the horizontal direction, and the communication hole 23 communicates the left chamber, the right chamber and the inner cavity 21 of the sliding member 2. The communicating hole 23 is provided to equalize the liquid pressure in the housing 1 everywhere, so that the sliding member 2 can move freely in the housing 1, and the sealing ball 4 is prevented from blocking the first through hole 15 due to the unsmooth movement of the sliding member 2.
As shown in fig. 1 and 2, in another embodiment, the housing 1 is composed of an outer casing 17 and an adjusting nut 18, the right side of the outer casing 17 has an opening, the adjusting nut 18 is disposed on the right side of the outer casing 17 and blocks the opening, the adjusting nut 18 is used as the right side wall 14 of the housing 1, the adjusting nut 18 is screwed with the outer casing 17, and the elastic force of the second elastic member 6 can be adjusted by rotating the adjusting nut 18.
For example, the housing 1 is rectangular, i.e. the casing 17 is rectangular, so that the housing 1 also has a front side wall and a rear side wall.
This embodiment facilitates adjustment of the elastic force of the second elastic member 6 by providing the housing 1 with a structure in which the housing 17 and the adjustment nut 18 are coupled, thereby facilitating adjustment of the pressing force of the support ball 3 against the polished rod 100 and mounting of the slider 2.
The utility model discloses an automatic blowout preventer of well head is taken off absolutely to the polished rod prevents spouting effectually, can avoid the emergence of blowout accident and the environmental pollution who brings from this, reduces worker's patrol well and administers the intensity of labour who pollutes, has better practicality and certain spreading value.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention. Moreover, it should be noted that the components of the present invention are not limited to the above-mentioned integral application, and various technical features described in the present invention can be selected to be used alone or in combination according to actual needs, so that the present invention naturally covers other combinations and specific applications related to the invention of the present invention.
Claims (10)
1. The automatic wellhead blowout preventer is characterized by comprising:
the hollow shell is provided with a top wall, a bottom wall, a left side wall and a right side wall, and a first perforation and a second perforation for a polish rod to pass through are respectively arranged on the top wall and the bottom wall;
the sliding part can be slidably arranged in the shell, a supporting ball is arranged on the left side wall of the sliding part, an inner cavity with an open top is arranged in the sliding part, a sealing ball and a first elastic part positioned below the sealing ball are arranged in the inner cavity, the sealing ball is pushed by the first elastic part to prop against the top wall of the shell, and a second elastic part is arranged between the right side wall of the sliding part and the right side wall of the shell;
under the state that the polish rod is not disconnected, the sliding piece and the supporting ball are positioned on the right side of the polish rod, and the supporting ball is pushed by the second elastic piece to be in contact with the polish rod; under the state that the polish rod is disconnected, the supporting ball slides towards the left under the pushing of the second elastic piece until the supporting ball abuts against the left side wall of the shell, the inner cavity is aligned and communicated with the first through hole, and the sealing ball blocks the first through hole under the pushing of the first elastic piece.
2. The polish rod breakaway wellhead automatic blowout preventer of claim 1, further comprising an upper flange and a lower flange for connection to a wellhead, the upper flange being located above the housing and fixedly connected to a top wall of the housing, the lower flange being located below the housing and fixedly connected to a bottom wall of the housing.
3. The polish rod break-off wellhead automatic blowout preventer according to claim 1, wherein the inner cavity penetrates through the slider in a vertical direction, and the inner cavity communicates with the second through hole in the polish rod break-off state.
4. The automatic blowout preventer according to claim 3, wherein the lower part of the inner cavity is provided with an annular step, the lower end of the first elastic member abuts against the annular step, and the upper end of the first elastic member abuts against the sealing ball.
5. The automatic blowout preventer according to claim 1, wherein the slider has a through hole in a left sidewall thereof, a pressing cap extending into the through hole, and a hemispherical groove formed in a left sidewall of the pressing cap, the hemispherical groove communicating with the through hole and defining a positioning groove, the support ball being rollably disposed in the positioning groove.
6. The automatic blowout preventer according to claim 1, wherein the sliding member divides the interior of the housing into a left chamber and a right chamber, and the sliding member is provided with a communication hole which extends through the sliding member in a horizontal direction and communicates the left chamber, the right chamber and the inner cavity of the sliding member.
7. The automatic blowout preventer of polish rod breaking off wellhead according to claim 1, wherein the housing is composed of a housing and an adjusting nut, the right side of the housing has an opening, the adjusting nut is arranged on the right side of the housing and blocks the opening, the adjusting nut is a right side wall of the housing, and the adjusting nut is in threaded connection with the housing.
8. The automatic blowout preventer of a polish rod breaking off wellhead according to claim 1, wherein the first through hole is a tapered hole, and the diameter of the tapered hole is gradually enlarged from top to bottom.
9. The automatic wellhead blowout preventer according to claim 1, wherein the support balls are nylon balls.
10. The polish rod breaking wellhead automatic blowout preventer of claim 1, wherein the first resilient member and the second resilient member are both springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921019622.3U CN210714573U (en) | 2019-07-02 | 2019-07-02 | Automatic blowout preventer for polished rod breaking-off wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921019622.3U CN210714573U (en) | 2019-07-02 | 2019-07-02 | Automatic blowout preventer for polished rod breaking-off wellhead |
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| Publication Number | Publication Date |
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| CN210714573U true CN210714573U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921019622.3U Active CN210714573U (en) | 2019-07-02 | 2019-07-02 | Automatic blowout preventer for polished rod breaking-off wellhead |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464083A (en) * | 2021-09-02 | 2021-10-01 | 东营浩辰石油技术开发有限公司 | Blowout prevention device for oil field oil exploitation |
-
2019
- 2019-07-02 CN CN201921019622.3U patent/CN210714573U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464083A (en) * | 2021-09-02 | 2021-10-01 | 东营浩辰石油技术开发有限公司 | Blowout prevention device for oil field oil exploitation |
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