CN219548834U - Ball seat with self-locking function - Google Patents

Abstract

The utility model discloses a ball seat with a self-locking function, which comprises a ball seat barrel, a ball seat sleeve, a positioning ring, a lower sliding sleeve, a closing-in clamp spring and a ball body, wherein the ball seat sleeve is fixedly embedded in the ball seat barrel, two ends of the ball seat sleeve are respectively provided with a falling opening and a containing opening which are mutually communicated, the positioning ring is fixedly embedded in the containing opening, the lower sliding sleeve is positioned in the positioning ring, the lower sliding sleeve is fixedly connected with the positioning ring through a splitting piece, the closing-in clamp spring is clamped at one end of the lower sliding sleeve, two ends of the lower sliding sleeve are respectively provided with a ball opening and a limiting opening which are mutually communicated, and the ball body is positioned in the ball opening. The utility model has simple structure, the ball is pumped into the lower sliding sleeve by the pump, the lower sliding sleeve can shear the shear pin under continuous pressurization in the well, the lower sliding sleeve moves to separate from the closing-up clamp spring, and the closing-up clamp spring moves to the slope position under the action of pressure, so that the closing-up operation is carried out, the ball is limited in the lower sliding sleeve, and the stability of the ball is effectively ensured.

Description

Ball seat with self-locking function

Technical Field

The utility model relates to the technical field of drilling equipment, in particular to a ball seat with a self-locking function.

Background

In the development of oil and gas fields, water is injected into an oil layer by using a water injection well to supplement and maintain the pressure of the oil layer, so that the yield of the oil and gas field is improved, and the water injection of the oil field generally comprises: separate layer water injection and general water injection, wherein separate layer water injection means: the packer is put into the oil-gas well to separate oil layers with different properties (such as oil layer permeability), and then the water distributor is used for carrying out layered water distribution, so that the water injection quantity of the oil layer with higher permeability is controlled, and the water injection quantity of the oil layer with lower permeability is enhanced, thereby improving the yield of the oil-gas field. After the packer is put into an oil and gas well, the packer needs to be pressed and set so as to realize the setting of the packer. Typically, the water injection string may be sealed by means of a ball seat and a ball injection fit, and then the packer is set by pressing.

The plugging ball in the prior art is generally directly placed in the ball sliding sleeve, the movable space of the plugging ball in the ball sliding sleeve is larger, and when the pressure in a well is unstable, the ball can be thrown out from the ball seat under the action of water pressure, so that the sealing failure of the water injection pipe column is caused.

Disclosure of Invention

The utility model aims to provide a ball seat with a self-locking function.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a take self-locking function ball seat, includes the ball seat barrel, still includes ball seat cover, holding ring, lower sliding sleeve, binding off jump ring and spheroid, the ball seat cover is fixed embedded in the ball seat barrel, and ball seat cover both ends are equipped with the whereabouts mouth and the holding mouth of intercommunication each other respectively, the holding ring is fixed embedded in holding mouthful, the lower sliding sleeve is located the holding ring, and through dividing part fixed connection between lower sliding sleeve and the holding ring, binding off jump ring block is in sliding sleeve one end down, the whereabouts mouth is loudspeaker form, and its narrow mouth is close to in holding mouthful position, the lower sliding sleeve both ends are equipped with the ball mouth and the spacing mouth of intercommunication each other respectively, the spheroid is located the ball mouth, the diameter of spacing mouth is less than spheroidal diameter.

Preferably, the split member is a shear pin.

Preferably, a slope is arranged on the inner wall of the accommodating port close to the falling port, and one side of the closing-up clamp spring close to the slope is provided with an inclined surface corresponding to the slope.

Preferably, when the inclined surface of the closing-up clamp spring is completely attached to the slope, the inner diameter of the closing-up clamp spring is smaller than the diameter of the sphere.

Preferably, the sphere is of stainless steel construction.

Preferably, the narrow mouth inner diameter of the falling mouth is larger than the diameter of the sphere.

Compared with the prior art, the utility model has the advantages that:

the ball body is pumped into the lower sliding sleeve by the pump, the ball body is extruded by the lower sliding sleeve under the continuous pressurization in the well, at the moment, the lower sliding sleeve can shear the shear pin, the lower sliding sleeve moves to separate from the closing-in clamp spring, the closing-in clamp spring moves to a slope position under the action of the pressure, so that closing-in operation is performed, the inner diameter of the closing-in clamp spring at the moment is smaller than the diameter of the ball body, the ball body is limited in the lower sliding sleeve, the stability of the ball body is effectively ensured, the ball body cannot return out even when the pressure is unstable, and the sealing effectiveness is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a tee with self-locking function according to the present utility model;

FIG. 2 is a cross-sectional view of the ball sleeve of the present utility model;

FIG. 3 is a cross-sectional view of a lower runner of the present utility model;

fig. 4 is a state diagram of the ball falling into the lower slide.

In the figure: the ball seat comprises a ball seat cylinder body 1, a ball seat sleeve 2, a falling opening 21, a receiving opening 22, a slope 23, a positioning ring 3, a lower sliding sleeve 4, a ball opening 41, a limiting opening 42, a closing-in clamp spring 5, a splitting piece 6 and a ball 7.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

Referring to fig. 1-4, the ball seat with the self-locking function provided by the utility model comprises a ball seat barrel 1, a ball seat sleeve 2, a positioning ring 3, a lower sliding sleeve 4, a closing-in clamp spring 5 and a ball 7, wherein the ball seat sleeve 2 is fixedly embedded in the ball seat barrel 1, two ends of the ball seat sleeve 2 are respectively provided with a falling opening 21 and a containing opening 22 which are mutually communicated, the positioning ring 3 is fixedly embedded in the containing opening 22, the lower sliding sleeve 4 is positioned in the positioning ring 3, the lower sliding sleeve 4 is fixedly connected with the positioning ring 3 through a splitting piece 6, the closing-in clamp spring 5 is clamped at one end of the lower sliding sleeve 4, the falling opening 21 is in a horn shape, the narrow opening is close to the containing opening 22, two ends of the lower sliding sleeve 4 are respectively provided with a ball opening 41 and a limiting opening 42 which are mutually communicated, the ball 7 is positioned in the ball opening 41, the diameter of the limiting opening 42 is smaller than that of the ball 7 is at the moment, the ball 7 is fed into the lower sliding sleeve 4 through a pump, the continuous pressurization in a well enables the ball 7 to be pressed by a strong enough pressure to squeeze the lower sliding sleeve 4, the clamp spring is clamped at one end, the lower sliding sleeve 4 can be separated from the ball 5, the lower sliding sleeve 5 can be blocked by the clamping clamp spring 5, and the stability can be ensured, and the sealing-in the lower sliding sleeve 5 can be blocked.

In this embodiment, the splitting member 6 is a shear pin, and when the ball 7 receives a strong enough pressure, the lower sliding sleeve 4 is extruded, and at this time, the lower sliding sleeve 4 can shear the shear pin.

Further, in this embodiment, the position that is close to the falling mouth 21 of holding mouth 22 inner wall is equipped with slope 23, one side that the binding off jump ring 5 is close to slope 23 position sets up to the inclined plane that corresponds each other with slope 23, and when binding off jump ring 5 to the slope 23 position removal, slope 23 can extrude binding off jump ring 5 for binding off jump ring 5 can carry out the binding off.

In this embodiment, when the inclined surface of the closing-up clamp spring 5 is completely attached to the slope 23, the inner diameter of the closing-up clamp spring 5 is smaller than the diameter of the sphere 7.

In this embodiment, the sphere 7 has a stainless steel structure, and has high structural strength, and is not easy to deform, thereby ensuring the plugging effect.

Further, to ensure that the ball 7 can smoothly fall into the lower sliding sleeve 4, in this embodiment, the inner diameter of the narrow opening of the falling opening 21 is larger than the diameter of the ball 7.

The specific operation steps and the working principle are as follows: the spheroid 7 is sent into lower sliding sleeve 4 through the pump, and the continuous pressurization in the well makes spheroid 7 receive enough strong pressure and extrudees lower sliding sleeve 4, and lower sliding sleeve 4 can cut the shear force nail this moment, thereby lower sliding sleeve 4 removes and breaks away from binding off jump ring 5, and binding off jump ring 5 moves to slope 23 positions under the pressure to carry out the binding off operation, the internal diameter that binding off jump ring 5 this moment is less than the diameter of spheroid 7, thereby with spheroid 7 restriction in lower sliding sleeve 4.

Although the embodiments of the present utility model have been described with reference to the accompanying drawings, the patentees may make various modifications or alterations within the scope of the appended claims, and are intended to be within the scope of the utility model as described in the claims.

Claims (6)

1. The utility model provides a take self-locking function ball seat, includes ball seat barrel, its characterized in that: still include ball seat cover, holding ring, lower sliding sleeve, binding off jump ring and spheroid, the ball seat cover is fixed to be embedded in the ball seat barrel, and ball seat cover both ends are equipped with the whereabouts mouth and the holding mouth of intercommunication each other respectively, the holding ring is fixed to be embedded in holding mouthful, the lower sliding sleeve is located the holding ring, and through division piece fixed connection between lower sliding sleeve and the holding ring, binding off jump ring block is in sliding sleeve one end down, the whereabouts mouth is loudspeaker form, and its narrow mouth is close to in holding mouthful position, lower sliding sleeve both ends are equipped with ball mouth and the spacing mouth of intercommunication each other respectively, the spheroid is located the ball mouth, the diameter of spacing mouth is less than spheroidal diameter.

2. The tee with self-locking function according to claim 1, wherein: the split piece is a shear pin.

3. The tee with self-locking function according to claim 1, wherein: the inner wall of the accommodating port is provided with a slope close to the falling port, and one side of the closing-up clamp spring close to the slope is provided with an inclined surface corresponding to the slope.

4. A tee with self-locking function as set forth in claim 3, wherein: when the inclined surface of the closing-in clamp spring is completely attached to the slope, the inner diameter of the closing-in clamp spring is smaller than the diameter of the sphere.

5. The tee with self-locking function according to claim 1, wherein: the sphere is of a stainless steel structure.

6. The tee with self-locking function according to claim 1, wherein: the inner diameter of the narrow opening of the falling opening is larger than the diameter of the sphere.