CN206513357U - A kind of horizontal well is oriented to abrasionproof sand control ball seat - Google Patents

Abstract

The utility model discloses a guiding anti-wear and anti-sand ball seat for a horizontal well, which belongs to the technical field of horizontal well layered water injection. One end of the joint is a cone or a conical truss, the other end of the guide wear-resistant joint is a concave rotary body, one end of the liquid inlet pipe is connected inside the concave rotary body, and the other end of the liquid inlet pipe is connected to The valve body and the liquid inlet pipe are provided with several sand-proof liquid inlet holes. The utility model is used to solve the problem that ordinary ball seats cannot be normally sealed in horizontal wells, and prevent impurities in the annulus of the oil casing from entering the oil pipe so as not to affect the normal operation of the intelligent water distributor, so as to achieve the purpose of precisely controlling the water injection volume. In addition, it can also reduce the resistance of the pipe string when running into the horizontal well, and at the same time reduce the wear on the casing.

Description

A horizontal well guiding anti-wear and anti-sand ball seat

technical field

The utility model belongs to the technical field of layered water injection for horizontal wells, in particular to a guiding anti-wear and anti-sand ball seat for horizontal wells.

Background technique

The ball seat is one of the necessary tools for the water injection string. At present, the conventional ball seat is connected to the bottom of the water injection string, which can realize the purpose of backwashing the well and forward water injection. The following problems exist in the use of conventional ball seats: First, ordinary ball seats must always be installed vertically, and when used in horizontal wells, there are phenomena of poor sealing or sealing delay, resulting in under-injection or over-injection of water injection. Second, resistance often occurs during the process of horizontal downhole water injection strings, which increases the wear on the inner wall of the casing and reduces its service life; Scale, seriously affecting the normal work of the water distributor;

Utility model content

In view of this, the utility model provides a horizontal well guiding anti-wear and anti-sand ball seat, which is simple in structure, durable and reliable, and is used to improve the sealing performance of the ball seat used in the horizontal well, reduce the resistance rate of the horizontal well under the pipe string, and prevent oil Impurities in the ring air enter the oil pipe so as not to affect the normal operation of the intelligent water distributor.

The utility model solves the above problems by the following technical means:

A guide anti-wear and anti-sand ball seat for a horizontal well, including a guide anti-wear joint, a liquid inlet pipe and a valve body, characterized in that one end of the guide anti-wear joint is a cone or a conical truss, and the end of the guide anti-wear joint The other end is a concave rotating body, one end of the liquid inlet pipe is connected inside the concave rotating body, and the other end of the liquid inlet pipe is connected to the valve body.

Further, a valve seat, a sealing ring, a conical spool, a spool spring, and a liquid outlet are sequentially arranged in the internal channel of the valve body, and the conical spool is provided with a liquid channel along a direction perpendicular to the centerline of the valve core. , the outer conical surface of the conical valve core and the inner side of the valve seat adopt a tight clearance fit, an annular groove is arranged around the valve seat, the sealing ring is arranged in the annular groove, and the valve core spring It is arranged between the mounting hole inside the cone valve core and the liquid outlet hole.

Further, the liquid inlet pipe is provided with several sand-proof liquid inlet holes.

Specifically, it also includes a limit short joint, which is arranged between the liquid inlet pipe and the valve body, and one end of the limit short joint is connected to the liquid inlet pipe through threads, and the limit short joint The other end of the valve body is connected to the valve body through threads, and the end surface of the limit short joint located inside the valve body is connected to the outside of the valve seat.

Further, the guide anti-friction joint is made of rubber material.

A horizontal well guiding anti-wear and anti-sand ball seat of the utility model has the following beneficial effects:

The utility model discloses a guide anti-wear and anti-sand ball seat for a horizontal well. The guide and anti-wear and anti-sand ball seat includes a guide and anti-wear joint, a liquid inlet pipe and a valve body. One end of the guide and anti-wear joint is a conical body or a conical platform, the other end of the guide anti-wear joint is a concave rotary body, one end of the liquid inlet pipe is connected inside the concave rotary body, the other end of the liquid inlet pipe is connected to the valve body, the liquid inlet A number of sand-proof liquid inlet holes are arranged on the pipe. The utility model is used to solve the problem that ordinary ball seats cannot be normally sealed in horizontal wells, and prevent impurities in the annulus of the oil casing from entering the oil pipe so as not to affect the normal operation of the intelligent water distributor, so as to achieve the purpose of precisely controlling the water injection volume. In addition, it can also reduce the resistance of the pipe string when running into the horizontal well, and at the same time reduce the wear on the casing.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Fig. 1 is a structural schematic diagram of a horizontal well guiding anti-wear and anti-sand ball seat provided by the utility model.

detailed description

In describing the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" , "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

The utility model will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a horizontal well guide anti-wear and anti-sand ball seat includes a guide anti-wear joint (1), a liquid inlet pipe (2) and a valve body (8), and one end of the guide anti-wear joint (1) It is a conical body or a conical platform, the other end of the guide anti-wear joint (1) is a concave rotary body, one end of the liquid inlet pipe (2) is connected inside the concave rotary body, and the liquid inlet pipe ( 2) The other end is connected to the valve body (8).

Further, a valve seat (4), a sealing ring (5), a conical valve core (6), a valve core spring (7) and a liquid outlet hole (9) are sequentially arranged in the internal channel of the valve body (8), The conical spool (6) is provided with a liquid channel along the direction perpendicular to the centerline of the spool, and the outer conical surface of the conical spool (6) is in close clearance fit with the inner side of the valve seat (4). An annular groove is arranged around the valve seat (4), the sealing ring (5) is arranged in the annular groove, and the valve core spring (7) is arranged in the mounting hole inside the conical valve core (6) and the outlet hole (9).

Further, the liquid inlet pipe (2) is provided with several sand control liquid inlet holes (201).

Specifically, there is a sand control liquid inlet hole (201) processed by laser on the liquid inlet pipe (2), the length of the sand control liquid inlet hole (201) is 50-80mm, and the sand control liquid inlet hole (201) The width is 0.1-0.3mm.

It should be noted that one end of the liquid inlet pipe (2) that is mated with the concave revolving body is provided with a blind hole end (202), and the blind hole end (202) and the concave surface of the concave revolving body are vulcanized. A connection scheme, that is, to connect the blind hole end (202) after melting the inner concave surface of the concave rotary body in a high temperature environment, or to connect the concave rotary body and the blind hole end (202) by using an adhesive under a high temperature environment .

Specifically, the valve seat (4) is equipped with an O-ring (5), and the conical valve core (6) has a large flow path channel, which is closely matched with the valve body (8) and has a The spring (7) mounting hole makes the spool spring (7) and the conical spool (6) be in the center position of the valve seat (5) all the time by the shoulder of the valve body.

Further, it also includes a limit short joint (3), the limit short joint (3) is arranged between the liquid inlet pipe (2) and the valve body (8), and one end of the limit short joint (3) The liquid inlet pipe (2) is connected by thread, and the other end of the limit joint (3) is connected to the valve body (8) by thread, and the limit joint (3) is located on the valve body ( 8) The inner end surface is connected to the outer side of the valve seat (4).

Further, the guide anti-friction joint (1) is made of rubber material.

In actual work, the guide anti-friction joint (1) solves the phenomenon of frequent resistance during the horizontal downhole water injection string, reduces the wear on the inner wall of the casing, and increases its service life; the sand-proof liquid inlet hole (201 ) to solve the impact of sand production and scaling in some oil wells in low-permeability oilfields in the late stage of oil production, so that the water distributor can work normally.

The utility model discloses a guiding anti-wear and anti-sand ball seat for a horizontal well, which belongs to the technical field of horizontal well layered water injection. One end of the joint is a cone or a conical truss, the other end of the guide wear-resistant joint is a concave rotary body, one end of the liquid inlet pipe is connected inside the concave rotary body, and the other end of the liquid inlet pipe is connected to The valve body and the liquid inlet pipe are provided with several sand-proof liquid inlet holes. The utility model is used to solve the problem that ordinary ball seats cannot be normally sealed in horizontal wells, and prevent impurities in the annulus of the oil casing from entering the oil pipe so as not to affect the normal operation of the intelligent water distributor, so as to achieve the purpose of precisely controlling the water injection volume. In addition, it can also reduce the resistance of the pipe string when running into the horizontal well, and at the same time reduce the wear on the casing.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (5)

1. a kind of horizontal well is oriented to abrasionproof sand control ball seat, including is oriented to blast joint (1), feed tube (2) and valve body (8), feature It is, described one end for being oriented to blast joint (1) is bullet or taper platform, and the other end of the guiding blast joint (1) is Concave surface revolving body, one end of the feed tube (2) is connected to inside the concave surface revolving body, the other end of the feed tube (2) Connect the valve body (8).

2. a kind of horizontal well as claimed in claim 1 is oriented to abrasionproof sand control ball seat, it is characterised in that the valve body (8) is internal Valve seat (4), sealing ring (5), taper valve core (6), valve core spring (7) and fluid hole (9), the taper are disposed with passage Valve element (6) is provided with fluid passage, the outside conical surface and the valve seat of taper valve core (6) along perpendicular to center spool line direction (4) inner side is coordinated using close gap, and valve seat (4) surrounding is provided with annular groove, and the sealing ring (5) is arranged on institute State in annular groove, the valve core spring (7) is arranged on the inside of the taper valve core (6) between mounting hole and fluid hole (9).

3. a kind of horizontal well as claimed in claim 2 is oriented to abrasionproof sand control ball seat, it is characterised in that on the feed tube (2) It is provided with some sand control inlet openings (201).

4. a kind of horizontal well as claimed in claim 3 is oriented to abrasionproof sand control ball seat, it is characterised in that also including limiting pup joint (3), the limiting pup joint (3) is arranged between feed tube (2) and valve body (8), and one end of the limiting pup joint (3) passes through screw thread The feed tube (2) is connected, the other end of the limiting pup joint (3) is connected through a screw thread the valve body (8), the limiting pup joint (3) it is located at the outside that the internal end face of the valve body (8) connects the valve seat (4).

5. a kind of horizontal well as claimed in claim 4 is oriented to abrasionproof sand control ball seat, it is characterised in that the guiding blast joint (1) it is fabricated by by elastomeric material.