CN216974784U

CN216974784U - Multifunctional wellhead plugging device for pumping well

Info

Publication number: CN216974784U
Application number: CN202121515954.8U
Authority: CN
Inventors: 申宏; 刘兴文; 苗一青; 隆新耀; 孙国田; 单保华; 刘伟伟; 苏东江
Original assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Gudao Oil Extraction Plant
Current assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Gudao Oil Extraction Plant
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2022-07-15
Anticipated expiration: 2031-07-06

Abstract

A casing of a multifunctional wellhead plugging device for a pumping well is in a cross shape, a clamp head is arranged at each of the upper end and the lower end of the casing, a central hole is formed in the casing, a long sealing cavity is formed in the left side of the casing, a long rubber sealing body connected with a left sealing seat is arranged in the long sealing cavity, a long lead screw is movably connected with the left sealing seat, the long lead screw is in threaded connection with the central hole of a left end socket and penetrates through the central hole, a hand wheel is arranged at the left end of the long lead screw, and the left end socket is in threaded connection with the left end of the long sealing cavity; a short sealing cavity is formed in the right side of the shell, a short rubber sealing body connected with a right sealing seat is arranged in the short sealing cavity, a short lead screw is movably connected with the right sealing seat, the short lead screw is in threaded connection with a central hole of a right sealing head and penetrates through the central hole, a hand wheel is arranged at the right end of the short lead screw, and the right sealing head is in threaded connection with the right end of the short sealing cavity; the short rubber sealing body and the long rubber sealing body are guided by the guide bolt. After the polish rod is broken, the utility model has two functions of clamping the polish rod and sealing or directly plugging a wellhead, prevents crude oil in the well from being sprayed out, effectively prevents environmental pollution and reduces crude oil loss.

Description

Multifunctional wellhead plugging device for pumping well

Technical Field

The utility model relates to the technical field of oil field oil extraction engineering, in particular to a multifunctional wellhead plugging device for an oil pumping well.

Background

At present, when a beam-pumping unit and a belt-pumping unit are produced, a sucker rod string mainly acts on transferring power to a piston of a deep-well pump so as to drive the piston to reciprocate, crude oil at the bottom of a well is exploited to the ground, a polish rod is arranged at the upper end of the sucker rod string and acts on connecting the sucker rod string and a hair braid to transfer power and sealing a well mouth with a packing box in a matching manner so as to prevent inlet leakage, and the crude oil in the well can be cracked due to fatigue because the sucker rod string works in the field all year round and is influenced by adverse factors such as large load and the like, once the cracked sucker rod string falls below the packing box, the crude oil in the well can be sprayed out from the position of the packing box in a large amount, so that large-area pollution is caused.

The blowout accident caused by polished rod breaking in site mainly adopts two prevention modes: firstly, the blowout prevention ball is arranged at the position of a wellhead packing box, when a polished rod is broken, the blowout prevention ball can be popped out, and a space is reserved for sealing the polished rod, so that the sealing performance of the blowout prevention ball is greatly reduced due to the continuous friction between the blowout prevention ball and the polished rod, and the longer the time is, the worse the effect is; and secondly, a stop valve is arranged between the flange on the Christmas tree and the tee joint, the Christmas tree can be sealed by closing the stop valve when the polish rod is broken, the seal is good, but when the polish rod is just broken at the position of the stop valve, the stop valve cannot be closed due to the blocking of the polish rod, and the seal effect cannot be realized.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects, the utility model provides the multifunctional wellhead plugging device for the pumping well.

The purpose of the utility model is realized by the following technical scheme:

the utility model includes: the device comprises a shell, a short rubber sealing body, a long rubber sealing body, a guide bolt, a left sealing seat, a right sealing seat, a long lead screw, a short lead screw, a left sealing head, a right sealing head, a hand wheel and a polished rod; the method is characterized in that: the shell is in a cross shape, the upper end and the lower end of the shell are respectively provided with a clamp head and a central hole, the left side of the shell is provided with a long sealing cavity, a long rubber sealing body connected with a left sealing seat is arranged in the long sealing cavity, a long lead screw is movably connected with the left sealing seat, the long lead screw is in threaded connection with the central hole of the left end socket and penetrates through the central hole of the left end socket, the left end of the long lead screw is provided with a hand wheel, the left end socket is in threaded connection with the left end of the long sealing cavity, and the outer end of the left end socket is provided with a hexagon; a short sealing cavity is formed in the right side of the shell, a short rubber sealing body connected with the right sealing seat is arranged in the short sealing cavity, a short lead screw is movably connected with the right sealing seat, the short lead screw is in threaded connection with a central hole of the right sealing head to penetrate through, a hand wheel is arranged at the right end of the short lead screw, the right sealing head is in threaded connection with the right end of the short sealing cavity, and a hexagon is arranged at the outer end of the right sealing head; the short rubber sealing body and the long rubber sealing body are guided by the guide bolt.

Furthermore, the short rubber seal body is a cylinder, a semicircular hole is formed in the left end of the short rubber seal body, the diameter of the semicircular hole is equal to that of the polished rod, and two rectangular bulges are transversely arranged and matched with the long rubber seal body.

Furthermore, the long rubber sealing body is a cylinder, a semicircular hole is formed in the right end of the long rubber sealing body, the diameter of the semicircular hole is equal to that of the polished rod, and two rectangular openings are transversely formed in the semicircular hole and matched with the short rubber sealing body.

Furthermore, when the long rubber sealing body is opposite to the short rubber sealing body, a polish rod through hole is formed, the polish rod is clamped, and a wellhead is sealed.

Furthermore, the short rubber sealing body moves rightwards in a limiting mode, and the long rubber sealing body moves rightwards to abut against the short rubber sealing body, so that the center hole of the shell is sealed, and a wellhead is sealed.

Furthermore, a steel ring groove is arranged on the plane of the clamp head.

Furthermore, guide grooves are formed in the upper portions of the left sealing seat and the right sealing seat, and the width of each guide groove is larger than the diameter of each guide bolt.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, and for example, may be fixedly connected, or may be detachably connected or integrated; the components can be mechanically connected, directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other or the two components can interact with each other, and unless otherwise specifically limited, the specific meaning of the terms in the present invention can be understood by those skilled in the art according to specific situations.

Compared with the prior art, the utility model has the following beneficial effects:

the device is connected to a Christmas tree through a clamp, when a polish rod falls below a polish rod sealer to prevent crude oil in a shaft from being sprayed out, a long lead screw at one side of a long rubber sealing body is rotated firstly, if the displacement of the long sealing body exceeds the center of the polish rod sealer, the polish rod falls below a multifunctional wellhead plugging device of a Christmas tree pumping well, the movement is continued until the polish rod is attached to a short rubber sealing body, and a space generated by the fall of the polish rod is sealed; if the long rubber sealing body meets resistance from the center of the polish rod sealing device, the polish rod is broken off and is positioned above the multifunctional wellhead plugging device of the pumping well, the lead screw of the short rubber sealing body on the right side is rotated, so that the two sealing bodies are attached to clamp the polish rod, and well blowout is prevented in a sealing manner; the pressure of the shaft is cut off when the wellhead packing box is replaced, so that the packing can be conveniently replaced; effectively prevent environmental pollution and reduce crude oil loss.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below, and the same reference numerals will be used throughout the drawings to designate the same components, which are for the purpose of illustrating the preferred embodiments only and are not to be construed as limiting the present invention.

FIG. 1 is a schematic view of a front view of the present invention

FIG. 2 is a schematic diagram of the structure of the field application of the present invention

In the figure: 1. the clamp comprises a shell, 1-1 parts of a clamp head, 1-2 parts of a long sealing cavity and 1-3 parts of a short sealing cavity; 2. the oil well pumping head comprises a short rubber sealing body, 3. a long rubber sealing body, 4. a guide bolt, 5. a left sealing seat, 5 '. a right sealing seat, 6. a long lead screw, 6 '. a short lead screw, 7. a left sealing head, 7 '. a right sealing head, 8. a hand wheel, 9. an oil production tree, 10. a pumping well multifunctional well head plugging device, 11. a tee joint, 12. a production gate, 13. a check valve, 14. an oil nozzle sleeve, 15. a polish rod sealing device and 16. a polish rod; D. guide way, G.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, with the specific understanding that: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.

The utility model will be further described with reference to the following figures and embodiments:

as shown in fig. 1, a multifunctional wellhead plugging device for pumping wells comprises: the sealing device comprises a shell 1, a short rubber sealing body 2, a long rubber sealing body 3, a guide bolt 4, a left sealing seat 5, a right sealing seat 5 ', a long screw 6, a short screw 6 ', a left sealing head 7, a right sealing head 7 ', a hand wheel 8 and a polished rod 16; the method is characterized in that: the shell 1 is in a cross shape, the upper end and the lower end of the shell are respectively provided with a clamp head 1-1 and a central hole O, the left side of the shell is provided with a long sealing cavity 1-2, a long rubber sealing body 3 connected with a left sealing seat 5 is arranged in the long sealing cavity 1-2, a long lead screw 6 is movably connected with the left sealing seat 5, the long lead screw 6 is in threaded connection with the central hole of a left sealing head 7 and penetrates through the central hole, the left end of the long lead screw 6 is provided with a hand wheel 8, the left sealing head 7 is in threaded connection with the left end of the long sealing cavity 1-2, and the outer end of the left sealing head 7 is provided with a hexagon; the right side of the shell 1 is provided with a short sealing cavity 1-3, a short rubber sealing body 2 connected with a right sealing seat 5 'is arranged in the short sealing cavity 1-3, a short screw 6' is movably connected with the right sealing seat 5 ', the short screw 6' is in threaded connection with a central hole of a right sealing head 7 'and penetrates through the central hole, the right end of the short screw 6' is provided with a hand wheel 8, the right sealing head 7 'is in threaded connection with the right end of the short sealing cavity 1-3, and the outer end of the right sealing head 7' is provided with a hexagon; the short rubber sealing body 2 and the long rubber sealing body 3 are guided by a guide bolt 4.

Specifically, short rubber seal 2 is the cylinder, and the left end is equipped with the semicircle orifice, and the semicircle orifice diameter equals the polished rod diameter, transversely is equipped with two rectangle archs, cooperates with long rubber seal 3.

Specifically, long rubber seal 3 is the cylinder, and the right-hand member is equipped with the semicircle orifice, and the semicircle orifice diameter equals the polished rod diameter, transversely is equipped with two rectangle openings, cooperates with short rubber seal 2.

Specifically, when the long rubber sealing body 3 is opposite to the short rubber sealing body 2, a polish rod 16 through hole is formed, the polish rod 16 is clamped, and a wellhead is sealed.

Specifically, the short rubber sealing body 2 moves rightwards in a limiting mode, the long rubber sealing body 3 moves rightwards to abut against the short rubber sealing body 2, the center hole O of the shell 1 is sealed, and a wellhead is sealed.

Specifically, a steel ring groove G is arranged on the plane of the clamp head 1-1.

Specifically, the upper parts of the left sealing seat 5 and the right sealing seat 5' are provided with guide grooves D, and the width of each guide groove is larger than the diameter of each guide bolt 4.

When the multifunctional wellhead plugging device for the pumping well is used, firstly, during oil well operation, the multifunctional wellhead plugging device 10 for the pumping well is arranged on an upper cover of a large flange of a Christmas tree 9, a steel ring is arranged in a steel ring groove G of a clamp head 1-1 of a shell 1 and is connected by a clamp, and the upper part of the multifunctional wellhead plugging device 10 for the pumping well is connected with a tee joint 11 and a polished rod sealer 15 sequentially by the clamp; secondly, the right side of the tee joint 11 is connected with a production gate 12, a check valve 13 and an oil nozzle sleeve 14 in sequence by a hoop; thirdly, the vertical guide pipe and the back pressure gate are connected on the oil nozzle sleeve 14; fourthly, the polished rod 16 is lifted upwards to prevent the impact distance, and the polished rod 16 is connected with a square clamp through a rope hanger, so that the well opening production of the pumping unit can be started.

A pumping well multi-functional well head plugging device, in order to prevent the crude oil of pit shaft from squirting below the polished rod sealer 15 when the polished rod 16 breaks off, rotate long lead screw 6 of one side of long rubber seal 3 at first, if the displacement of long rubber seal 3 exceeds the centre of polished rod sealer 15, indicate the polished rod 16 breaks off to the multi-functional well head plugging device 10 of the pumping well of Christmas tree 9, continue moving, until laminating with short rubber seal 2, seal the space produced because of the polished rod 16 breaks off; if the long rubber sealing body 3 meets resistance from the center of the polish rod sealing device 15, and the polish rod 16 is broken off at a position above the multifunctional wellhead plugging device 10 of the pumping well, the short screw rod 6' of the right short rubber sealing body 2 is rotated, so that the two sealing bodies are attached to clamp the polish rod 16, and well blowout is prevented in a sealing mode. At this time, the check valve 13 prevents the crude oil in the oil collecting pipeline from flowing backwards, thereby achieving the purposes of effectively preventing environmental pollution and reducing crude oil loss.

While preferred embodiments of the present invention have been described above, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted to embrace the preferred embodiments and all such variations and modifications as fall within the true spirit and scope of the present invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A multifunctional wellhead plugging device for a pumping well comprises: the sealing device comprises a shell (1), a short rubber sealing body (2), a long rubber sealing body (3), a guide bolt (4), a left sealing seat (5), a right sealing seat (5 '), a long screw (6), a short screw (6 '), a left sealing head (7), a right sealing head (7 '), a hand wheel (8) and a polished rod (16); the method is characterized in that: the shell (1) is in a cross shape, the upper end and the lower end of the shell are respectively provided with a clamp head (1-1) which is provided with a center hole (O), the left side of the shell is provided with a long sealing cavity (1-2), a long rubber sealing body (3) connected with a left sealing seat (5) is arranged in the long sealing cavity (1-2), a long lead screw (6) is movably connected with the left sealing seat (5), the long lead screw (6) is in threaded connection with the center hole of the left sealing head (7) to penetrate through, the left end of the long lead screw (6) is provided with a hand wheel (8), the left sealing head (7) is in threaded connection with the left end of the long sealing cavity (1-2), and the outer end of the left sealing head (7) is provided with a hexagon; a short sealing cavity (1-3) is formed in the right side of the shell (1), a short rubber sealing body (2) connected with a right sealing seat (5 ') is arranged in the short sealing cavity (1-3), a short screw rod (6') is movably connected with the right sealing seat (5 '), the short screw rod (6') is in threaded connection with a central hole of a right sealing head (7 ') and penetrates through the central hole, a hand wheel (8) is arranged at the right end of the short screw rod (6'), the right sealing head (7 ') is in threaded connection with the right end of the short sealing cavity (1-3), and a hexagon is arranged at the outer end of the right sealing head (7'); the short rubber sealing body (2) and the long rubber sealing body (3) are guided by guide bolts (4).

2. The multifunctional wellhead plugging device for the pumping well as claimed in claim 1, characterized in that: the short rubber sealing body (2) is a cylinder, a semicircular hole is formed in the left end of the short rubber sealing body, the diameter of the semicircular hole is equal to that of the polished rod, and two rectangular protrusions are transversely arranged and matched with the long rubber sealing body (3).

3. The multifunctional wellhead plugging device for the pumping well as claimed in claim 1, characterized in that: the long rubber sealing body (3) is a cylinder, a semicircular hole is formed in the right end of the long rubber sealing body, the diameter of the semicircular hole is equal to that of the polished rod, and two rectangular openings are transversely formed and matched with the short rubber sealing body (2).

4. The multifunctional wellhead plugging device for the pumping well according to the claim 2 or 3, wherein the long rubber sealing body (3) and the short rubber sealing body (2) are opposite to each other to form a through hole of the polish rod (16), so that the polish rod (16) is clamped and the wellhead is sealed.

5. The multifunctional wellhead plugging device for the pumping well as claimed in claim 1, characterized in that: the short rubber sealing body (2) moves rightwards in a limiting mode, the long rubber sealing body (3) moves rightwards to abut against the short rubber sealing body (2), a center hole (O) of the shell (1) is sealed, and a well mouth is sealed.

6. The multifunctional wellhead plugging device for the pumping well as claimed in claim 1, characterized in that: and a steel ring groove (G) is arranged on the plane of the clamp head (1-1).

7. The multifunctional wellhead plugging device for the pumping well as claimed in claim 1, characterized in that: and guide grooves (D) are formed in the upper parts of the left sealing seat (5) and the right sealing seat (5'), and the width of each guide groove is larger than the diameter of each guide bolt (4).