CN211474057U

CN211474057U - Forced arrow-shaped drilling tool check valve

Info

Publication number: CN211474057U
Application number: CN202020014503.5U
Authority: CN
Inventors: 韦俨修; 熊正然; 陈翰
Original assignee: Guanghan Hongcheng Petroleum Tools Co ltd
Current assignee: Guanghan Hongcheng Petroleum Tools Co ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-09-11
Anticipated expiration: 2030-01-02

Abstract

The utility model relates to a valve technical field for the well drilling discloses a forced arrow-shaped drilling tool check valve, including valve body, disk seat, case and reset assembly, the valve body has the valve pocket, disk seat and case set up in the valve pocket, form sealed cavity between the outer wall of case and the inner chamber wall of valve pocket, reset assembly set up in the sealed cavity. The utility model discloses set up the reset assembly seal in forming sealed cavity between the outer wall of case and the inner chamber wall of valve pocket, can avoid the high-speed drilling liquid to erode reset assembly, prolonged the life of reset assembly and check valve.

Description

Forced arrow-shaped drilling tool check valve

Technical Field

The utility model belongs to the technical field of the valve for the well drilling, especially, relate to a forced arrow-shaped drilling tool check valve.

Background

The underground check valve is an internal blowout prevention tool arranged on an underground drill string and mainly comprises a valve core assembly, a resetting system and a valve body. When the well is normally drilled, the drilling fluid rushes open the sealing surface of the valve core to start circulation. Once the drilling fluid stops circulating or the well kick or blowout occurs underground, the valve core can be automatically and quickly closed under the action of the reset system, so that the aim of preventing the fluid in the shaft from flowing back is fulfilled.

In the use process of the existing underground check valve, the return spring is eroded by the drilling fluid flowing at a high speed, so that the easily eroded and damaged spring of the wearing part is easy to damage, and finally the check valve fails, and therefore how to solve the problems becomes the key point of research of people in the field.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a forced arrow-shaped drilling tool check valve, it is not enough to have solved prior art.

The embodiment of the utility model is realized like this:

a forced arrow-shaped check valve for a drilling tool comprises a valve body, a valve seat, a valve core and a reset assembly, wherein the valve body is provided with a valve cavity, the valve seat and the valve core are arranged in the valve cavity, a sealed cavity is formed between the outer wall of the valve core and the inner cavity wall of the valve cavity, and the reset assembly is arranged in the sealed cavity.

Furthermore, the inner cavity wall of the valve cavity is provided with a first step bulge, the outer side wall of the valve core is provided with a second step bulge, and the resetting component is fixedly connected with the first step bulge and the second step bulge.

Further, the reset component is an elastic component.

Furthermore, the elastic assembly comprises a return spring and spring pipe plugs connected with two ends of the return spring, and the spring pipe plugs at two ends are respectively arranged in limiting counter bores arranged on the first step protrusion and the second step protrusion.

Furthermore, one end of the valve seat, which is close to the valve core, is provided with a conical opening, and the valve core is connected with the conical opening in a matching manner.

The utility model has the advantages that:

the utility model discloses set up the reset assembly seal in forming sealed cavity between the outer wall of case and the inner chamber wall of valve pocket, can avoid the high-speed drilling liquid to erode reset assembly, prolonged the life of reset assembly and check valve.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a forced arrow-shaped check valve of a drilling tool provided by the present invention;

fig. 2 is a schematic view of the valve cartridge.

Icon: 1-valve body, 2-valve seat, 3-valve core, 301-conical shoulder, 4-flow passage, 5-sealed cavity, 6-reset spring and 7-spring plug.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 2, the present embodiment provides a forced arrow-shaped check valve for a drilling tool, including a valve body 1, a valve seat 2, a valve core 3 and a reset assembly, where an overflow channel 4 is disposed inside the valve body 1, a valve cavity is disposed in the overflow channel 4, the valve seat 2 and the valve core 3 are installed in the valve cavity, a conical opening is disposed at a position where the valve seat 2 and the valve core 3 are connected, a conical shoulder 301 is formed at a matching connection position of the valve core 3 and the conical opening, and the conical shoulder 301 and the conical opening are matched, so that effective sealing can be performed, and drilling fluid backflow can be prevented.

A sealed cavity 5 is formed between the outer wall of the valve core 3 and the inner cavity wall of the valve cavity, the reset component is arranged in the sealed cavity 5, and the reset component is an object capable of elastically deforming. Specifically, in this embodiment, the reset assembly includes a reset spring 6 and spring plugs 7 embedded at two ends of the reset spring 6, a second step protrusion is provided at a position on the outer wall of the valve core 3, which is close to the conical convex shoulder 301, and protrudes outward, a limiting counter bore is provided on the end surface of the second step protrusion, the spring plug 7 at one end of the reset spring 6 is installed in the counter bore at the side, a first step protrusion is provided on the inner cavity wall of the valve cavity, a limiting counter bore on which the spring plug 7 is installed is provided on the first step protrusion, and the spring plug 7 at the other end of the reset spring 6 is installed in the limiting counter bore at the side.

When the utility model is used and the ground is pumped for circulation, the power of the drilling fluid forces the valve core 3 to move towards the right side, the reset spring is pressed, the drilling fluid circulates normally through the overflow channel 4, the reset spring 6 is protected in the sealed cavity 5, and the erosion of the drilling fluid is avoided; when the ground stops pumping, the drilling fluid no longer has power, and reset spring provides elasticity and makes the case move to the left, forms the butt with disk seat 2 and will flow through the passageway 4 sealed to the realization prevents the mesh of drilling fluid backward flow.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a forced arrow-shaped drilling tool check valve, includes valve body (1), disk seat (2), case (3) and reset assembly, valve body (1) has the valve pocket, disk seat (2) and case (3) set up in the valve pocket, its characterized in that: a sealed cavity (5) is formed between the outer wall of the valve core (3) and the inner cavity wall of the valve cavity, and the resetting component is arranged in the sealed cavity (5).

2. A forced arrow drill check valve as defined in claim 1, wherein: the inner cavity wall of the valve cavity is provided with a first step bulge, the outer side wall of the valve core (3) is provided with a second step bulge, and the resetting component is fixedly connected with the first step bulge and the second step bulge.

3. A forced arrow drill check valve as defined in claim 2, wherein: the reset component is an elastic component.

4. A forced arrow drill check valve as defined in claim 3, wherein: the elastic assembly comprises a return spring (6) and spring pipe plugs (7) connected with two ends of the return spring (6), and the spring pipe plugs (7) at two ends are respectively arranged in limiting counter bores arranged on the first step protrusion and the second step protrusion.

5. A forced arrow drill check valve as defined in claim 2, wherein: one end of the valve seat (2) close to the valve core (3) is provided with a conical opening, and the valve core (3) is connected with the conical opening in a matching manner.