阅读说明：本技术 一种可控式封井工具 (Controllable well plugging tool ) 是由 王树杰 于 2019-10-23 设计创作，主要内容包括：本发明公开了一种可控式封井工具,包括本体、芯阀总体和泄压装置；本体为十字四通结构；本体的左右端设有第一阀盖和第二阀盖；第一阀盖和第二阀盖内分别设有第一阀杆和第二阀杆；芯阀总体设于本体的内部并由第一芯体和第二芯体拼接组成；第一阀杆的一端通过滚子轴承与第一芯体固定连接,第一阀杆的另一端贯穿于第一阀盖并在其外端延伸处设有第一手轮；第二阀杆的一端通过滚子轴承与第二芯体固定连接,第二阀杆的另一端贯穿于第二阀盖并在其外端延伸处设有第二手轮；泄压装置设于本体的上端开口处。与现有技术相比本发明的有益效果是：结构简单可靠,密封性好；同时还具备可调泄压功能,以保证作业的安全。(The invention discloses a controllable well sealing tool, which comprises a body, a core valve assembly and a pressure relief device, wherein the core valve assembly comprises a core valve body and a core valve body; the body is of a cross four-way structure; the left end and the right end of the body are provided with a first valve cover and a second valve cover; a first valve rod and a second valve rod are respectively arranged in the first valve cover and the second valve cover; the core valve is generally arranged in the body and is formed by splicing a first core body and a second core body; one end of the first valve rod is fixedly connected with the first core through a roller bearing, and the other end of the first valve rod penetrates through the first valve cover and is provided with a first hand wheel at the extending position of the outer end of the first valve rod; one end of the second valve rod is fixedly connected with the second core body through a roller bearing, and the other end of the second valve rod penetrates through the second valve cover and is provided with a second hand wheel at the extending position of the outer end of the second valve rod; the pressure relief device is arranged at the upper end opening of the body. Compared with the prior art, the invention has the beneficial effects that: the structure is simple and reliable, and the sealing performance is good; meanwhile, the pressure relief device has an adjustable pressure relief function so as to ensure the safety of operation.)

1. A controllable well plugging tool, which is characterized in that: comprises a body (1), a core valve assembly and a pressure relief device; the body (1) is of a cross four-way structure, and four open ends of the body are provided with external thread structures; the left end and the right end of the body (1) are respectively in threaded connection with a first valve cover (6) and a second valve cover (7); a first valve rod (8) and a second valve rod (9) are respectively arranged in the first valve cover (6) and the second valve cover (7); the core valve is generally arranged inside the body (1) and is formed by splicing a first core body (2) and a second core body (3); one end of the first valve rod (8) is fixedly connected with the first core body (2) through a roller bearing, the other end of the first valve rod (8) penetrates through the first valve cover (6), and a first hand wheel (10) is arranged at the extending position of the outer end of the first valve rod; one end of the second valve rod (9) is fixedly connected with the second core body (3) through a roller bearing, and the other end of the second valve rod (9) penetrates through the second valve cover (7) and is provided with a second hand wheel (11) at the extending position of the outer end thereof; the pressure relief device is arranged at an opening at the upper end of the body (1).

2. A controllable well sealing tool as claimed in claim 1, wherein: grooves are symmetrically formed in the lower ends of the first core body (2) and the second core body (3); the groove is provided with a rubber core (4); the outer end of the rubber core (4) is provided with a pressing plate (5), and the rubber core (4) and the pressing plate (5) are fixed in the groove through fastening bolts.

3. A controllable well sealing tool as claimed in claim 2, wherein: the width of the rubber core (4) arranged on the upper end surface of the groove is larger than that of the transverse surface of the groove; the width of the pressing plate (5) below the rubber core (4) at the upper end face of the groove is smaller than that of the transverse face of the groove.

4. A controllable well sealing tool as claimed in claim 1, wherein: the upper ends of the first core body (2) and the second core body (3) are symmetrically provided with sliding grooves (19); guide bolts (12) are symmetrically arranged on the body (1) above the sliding groove (19); the lower ends of the guide bolts (12) are clamped and embedded in the upper end sliding grooves (19) of the first core body (2) and the second core body (3).

5. A controllable well sealing tool as claimed in claim 1, wherein: the pressure relief device comprises a pressure relief pipe (13), a pressure relief opening (14), a lower sliding barrel (15), an upper sliding barrel (17) and a connector (18); the lower end of the pressure relief pipe (13) is in threaded connection with an opening at the upper end of the body (1); the connector (18) penetrates through the upper end of the pressure relief pipe (13) and is connected with the upper end of the pressure relief pipe in a threaded manner; the upper sliding cylinder (17) is fixed at the lower end of the connector (18); the lower sliding cylinder (15) is arranged below the upper sliding cylinder (17), and a pressure spring (16) is arranged between the lower sliding cylinder and the upper sliding cylinder; the pressure relief ports (14) are symmetrically arranged on two sides of the pressure relief pipe (13).

6. A controllable well-sealing tool as claimed in claim 5, wherein: the lower sliding barrel (15) and the upper sliding barrel (17) are attached to the inner wall of the pressure relief pipe (13), and sealing rings are arranged at the positions attached to the inner wall of the pressure relief pipe (13).

7. A controllable well-sealing tool as claimed in claim 5, wherein: the lower end of the lower sliding cylinder (15) is of an inverted step structure and is attached to the end face of the upper end opening of the body (1).

8. A controllable well-sealing tool as claimed in claim 5, wherein: the upper end of the connecting head (18) is connected with a power driving mechanism.

9. A controllable well sealing tool as claimed in claim 1, wherein: and sealing rings are arranged at the joint of the inner walls of the upper end and the lower end of the body (1) and the first core body (2) and the second core body (3).

10. A controllable well-sealing tool as claimed in claim 4, wherein: and a sealing gasket is arranged at the joint of the guide bolt (12) and the body (1).

Technical Field

The invention relates to the technical field of petroleum collection, in particular to a controllable well plugging tool.

Background

At the oil field development later stage, some oil-water wells need to be closed because of various reasons, the mode commonly used at present is, with sleeve pipe nipple joint department with steel sheet seal welding after demolising ground equipment and well head, but the oil well still probably recycles, the hydrocarbon reservoir in the well is thoroughly shutoff not, still there is a large amount of oil, water and natural gas in the pit shaft, when needs resume production, because nipple joint department is sealed by the welding, can't measure the pressure in the well, more can't learn various gas content in the well, if cut open by force, high-pressure gas in the well can jet in the twinkling of an eye, even cause the conflagration explosion, cause loss of property or casualties.

Disclosure of Invention

The invention aims to provide a controllable well plugging tool which is characterized by simple and reliable structure and good sealing performance; meanwhile, the pressure relief device has an adjustable pressure relief function so as to ensure the safety of operation.

In order to achieve the purpose, the invention provides the following technical scheme: a controllable well sealing tool comprises a body, a core valve assembly and a pressure relief device; the body is of a cross four-way structure, and four opening ends of the body are provided with external thread structures; the left end and the right end of the body are respectively in threaded connection with a first valve cover and a second valve cover; a first valve rod and a second valve rod are respectively arranged in the first valve cover and the second valve cover; the core valve is generally arranged in the body and is formed by splicing a first core body and a second core body; one end of the first valve rod is fixedly connected with the first core through a roller bearing, and the other end of the first valve rod penetrates through the first valve cover and is provided with a first hand wheel at the extending position of the outer end of the first valve rod; one end of the second valve rod is fixedly connected with the second core body through a roller bearing, and the other end of the second valve rod penetrates through the second valve cover and is provided with a second hand wheel at the extending position of the outer end of the second valve rod; the pressure relief device is arranged at an opening at the upper end of the body.

As optimization, grooves are symmetrically formed in the lower ends of the first core body and the second core body; a rubber core is arranged on the groove; the outer end of the rubber core is provided with a pressing plate, and the rubber core and the pressing plate are fixed in the groove through a fastening bolt.

As optimization, the width of the rubber core arranged on the upper end surface of the groove is larger than that of the transverse surface of the groove; the width of the pressing plate below the rubber core at the upper end face of the groove is smaller than that of the transverse face of the groove.

As optimization, sliding grooves are symmetrically formed in the upper ends of the first core body and the second core body; guide bolts are symmetrically arranged on the body above the sliding groove; the lower ends of the guide bolts are clamped and embedded in the upper end sliding grooves of the first core body and the second core body.

As optimization, the pressure relief device comprises a pressure relief pipe, a pressure relief opening, a lower sliding cylinder, an upper sliding cylinder and a connector; the lower end of the pressure relief pipe is in threaded connection with the upper end opening of the body; the connector penetrates through the upper end of the pressure relief pipe and is connected with the upper end of the pressure relief pipe in a threaded manner; the upper sliding barrel is fixed at the lower end of the connector; the lower sliding cylinder is arranged below the upper sliding cylinder, and a pressure spring is arranged between the upper sliding cylinder and the lower sliding cylinder; the pressure relief ports are symmetrically arranged on two sides of the pressure relief pipe.

And as optimization, the lower sliding barrel and the upper sliding barrel are attached to the inner wall of the pressure relief pipe, and sealing rings are arranged at the attachment positions of the lower sliding barrel and the upper sliding barrel and the inner wall of the pressure relief pipe.

Preferably, the lower end of the lower sliding barrel is of an inverted step structure and is attached to the end face of the opening in the upper end of the body.

Preferably, the upper end of the connector is connected with a power driving mechanism.

And optimally, sealing rings are arranged at the joint of the first core body, the second core body and the inner wall of the upper end and the lower end of the body.

Preferably, a sealing gasket is arranged at the joint of the guide bolt and the body.

Compared with the prior art, the invention has the following beneficial effects: the sealing structure is redesigned, and the sealing core body is pushed from two sides to be sealed in a threaded mode, so that the sealing speed and the sealing performance are improved; the overall structural design of the core valve is further optimized, the friction force between the core valve and the inner wall of the body is reduced, the sealing effect of the core valve is ensured, and the core valve plays a role in guiding through the guide bolt; the design of the pressure relief device is added, so that firstly, the pressure relief operation can be carried out on the gas in the tool, and secondly, the secondary sealing effect can be achieved, so that the overall sealing effect is improved; finally, the pressure relief efficiency can be further improved by connecting a pressure relief pipeline in the pressure relief port.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

The pressure-relief valve comprises a body 1, a first core body 2, a second core body 3, a rubber core 4, a pressure plate 5, a first valve cover 6, a second valve cover 7, a first valve rod 8, a second valve rod 9, a first hand wheel 10, a second hand wheel 11, a guide bolt 12, a pressure-relief pipe 13, a pressure-relief opening 14, a lower sliding barrel 15, a pressure spring 16, an upper sliding barrel 17, a connector 18 and a sliding groove 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", 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, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A controllable well sealing tool comprises a body 1, a core valve assembly and a pressure relief device; the body 1 is of a cross four-way structure, and four open ends of the body are provided with external thread structures; the left end and the right end of the body 1 are respectively in threaded connection with a first valve cover 6 and a second valve cover 7; a first valve rod 8 and a second valve rod 9 are respectively arranged in the first valve cover 6 and the second valve cover 7; the core valve is generally arranged in the body 1 and is formed by splicing a first core 2 and a second core 3; one end of the first valve rod 8 is fixedly connected with the first core 2 through a roller bearing, and the other end of the first valve rod 8 penetrates through the first valve cover 6 and is provided with a first hand wheel 10 at the extending part of the outer end of the first valve rod; one end of the second valve rod 9 is fixedly connected with the second core body 3 through a roller bearing, and the other end of the second valve rod 9 penetrates through the second valve cover 7 and is provided with a second hand wheel 11 at the extending part of the outer end thereof; the pressure relief device is arranged at an opening at the upper end of the body 1.

Grooves are symmetrically formed at the lower ends of the first core body 2 and the second core body 3; the groove is provided with a rubber core 4; the outer end of the rubber core 4 is provided with a pressing plate 5, and the rubber core 4 and the pressing plate 5 are fixed in the groove through a fastening bolt. The width of the rubber core 4 arranged on the upper end surface of the groove is larger than that of the transverse surface of the groove; the width of the pressing plate 5 below the rubber core 4 at the upper end surface of the groove is smaller than that of the transverse surface of the groove. The purpose of the grooves is to reduce the contact area between the first core 2 and the second core 3 and the lower edge of the inner wall of the body 1 so as to reduce the friction force; secondly, the rubber core 4 can be extruded symmetrically to ensure the sealing performance.

The upper ends of the first core body 2 and the second core body 3 are symmetrically provided with sliding grooves 19; guide bolts 12 are symmetrically arranged on the body 1 above the sliding groove 19; the lower ends of the guide bolts 12 are respectively embedded in the upper end sliding grooves 19 of the first core body 2 and the second core body 3. The purpose of the slide groove 19 is to reduce the contact area between the first core 2 and the second core 3 and the upper edge of the inner wall of the body 1 so as to reduce the friction force; secondly, can play the direction and spacing effect through guide bolt 12 to guarantee its accuracy and stability.

The pressure relief device comprises a pressure relief pipe 13, a pressure relief opening 14, a lower sliding barrel 15, an upper sliding barrel 17 and a connector 18; the lower end of the pressure relief pipe 13 is in threaded connection with the upper end opening of the body 1; the connector 18 penetrates through the upper end of the pressure relief pipe 13 and is connected with the pressure relief pipe through threads; the upper sliding cylinder 17 is fixed at the lower end of the connector 18; the lower sliding cylinder 15 is arranged below the upper sliding cylinder 17, and a pressure spring 16 is arranged between the lower sliding cylinder and the upper sliding cylinder; the pressure relief ports 14 are symmetrically arranged on two sides of the pressure relief pipe 13. The lower sliding barrel 15 and the upper sliding barrel 17 are attached to the inner wall of the pressure relief pipe 13, and sealing rings are arranged at the attachment positions of the lower sliding barrel 15 and the upper sliding barrel 17 and the inner wall of the pressure relief pipe 13. The lower end of the lower sliding barrel 15 is of an inverted step structure and is attached to the end face of the upper end opening of the body 1. Through the adjustment of the connector 18, firstly, the connector 18 can be rotated when needed, so that the lower slide 15 and the upper end of the body 1 are completely extruded and sealed, the secondary sealing effect is achieved, and the stability of the overall sealing performance is improved; secondly, the extrusion force can be adjusted by adjusting the position of the connector 18, so as to achieve the purpose of controllable pressure relief.

The upper end of the connecting head 18 is connected with a power driving mechanism. The control can be carried out by connecting a rotary driving motor, and the electric control type is preferably adopted, so that the control is safer and more effective.

And sealing rings are arranged at the joint of the inner walls of the upper end and the lower end of the body 1, and are respectively arranged at the first core 2 and the second core 3.

And a sealing gasket is arranged at the joint of the guide bolt 12 and the body 1.

The working principle of the invention is as follows:

when the well mouth is required to be completely sealed, the pressure relief opening 14 is sealed, firstly, the first hand wheel 10 and the second hand wheel 11 are rotated, the first core body 2 and the second core body 3 move inwards, the sealing effect is realized by extruding the rubber core 4, at the moment, if the sealing effect is ensured, the rotary connector 18 can be driven at the same time, the upper sliding cylinder 17 is driven to move downwards in the pressure relief pipe 13, the shortest contraction length is reached by extruding the pressure spring 16, enough pressure is ensured, the lower sliding cylinder 15 is ensured to be attached to the upper end opening end face of the body 1, and the secondary sealing effect is realized.

When pressure relief work is needed, the pressure relief opening 14 is opened and a pressure relief pipeline is connected, and the rotary connector 18 of the driving motor is used for controlling the pressure relief work through the extrusion force of the pressure spring 16.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.