CN220979432U

CN220979432U - Cone of tail pipe hanger

Info

Publication number: CN220979432U
Application number: CN202322913860.1U
Authority: CN
Inventors: 窦益华; 党元隆; 万志国; 李琳琳; 曹银萍
Original assignee: Xian Shiyou University
Current assignee: Xian Shiyou University
Priority date: 2023-10-30
Filing date: 2023-10-30
Publication date: 2024-05-17
Anticipated expiration: 2033-10-30

Abstract

The utility model relates to a tail pipe hanger cone, which comprises a hanger body, wherein a plurality of cone groups are uniformly arranged on the periphery of the hanger body; adjacent cone groups are not closely spaced; the gap between adjacent cone groups is a flow passage area; the cone group comprises a cone block, a first cone strip and a second cone strip, wherein the first cone strip and the second cone strip are positioned above the cone block, the first cone strip and the second cone strip are axially distributed along the hanger body from bottom to top, a first transverse diversion trench is arranged between the first cone strip and the cone block, and a second transverse diversion trench is arranged between the second cone strip and the first cone strip; the first cone strip is provided with a plurality of first diversion holes, and the second cone strip is provided with a plurality of second diversion holes. According to the utility model, the flow guide grooves and the flow guide holes are added, so that the area of the flow passage is increased, and the turbulent displacement of cement paste is facilitated, thereby effectively ensuring the cement paste displacement efficiency in the well cementation process and further improving the well cementation quality.

Description

Cone of tail pipe hanger

Technical Field

The utility model relates to the technical field of oil and gas exploration and development, in particular to a cone of a liner hanger.

Background

In recent years, with the increasing depth of oil and gas exploration and development, well temperature is also increasing, and the coexistence of high temperature, high pressure and multiple pressure systems is caused. High-temperature high-pressure wells are accompanied with the characteristics of well depth, small gaps and the like, the annular space is small, so that the annular space pressure consumption is high, the cement paste displacement efficiency is low, the cleaning effect of the well hole is poor, and the well cementation quality is difficult to ensure.

The liner hanger is an extremely important well cementation tool, the liner hanger sitting and hanging structure mainly comprises slips, cones and outer sleeves, the main working principle is that the liner hanger and accessories are sent to a preset position, after sitting and hanging balls are thrown, pressure is held, fluid enters a hydraulic cylinder through a hanger pressure transmission hole, when the pressure reaches preset parameters, shear nails at the tail of the hydraulic cylinder are sheared off, the hydraulic cylinder is pushed to ascend, meanwhile, the hydraulic cylinder pushes a supporting sleeve, a push rod and the slips to ascend synchronously, and the slips form self-locking between the inner wall of the upper sleeve and the conical surface of the cone sleeve, so that sitting and hanging are realized.

When a conventional tail pipe hanger works, the hanger is small in the area of the body due to annulus clearance limitation, and generally adopts a slip ascending mode after sitting and hanging, so that the area of a part of taper sleeves and a slip-to-slip flow passage is blocked, the area of the flow passage is greatly reduced, the circulating flushing effect and the well cementation effect before well cementation are greatly influenced, and even stratum leakage and circulating road blockage are caused due to the increase of the quantity of underground rock scraps, so that the construction effect is influenced.

For this purpose, a liner hanger cone is designed to solve the above problems.

Disclosure of Invention

The utility model provides a tail pipe hanger cone, which overcomes the defects, and comprises a hanger body, wherein a plurality of cone groups are uniformly arranged on the periphery of the hanger body; adjacent cone groups are not closely spaced; the gap between adjacent cone groups is a flow passage area;

The cone group comprises a cone block, a first cone strip and a second cone strip, wherein the first cone strip and the second cone strip are positioned above the cone block, the first cone strip and the second cone strip are axially distributed along the hanger body from bottom to top, a first transverse diversion trench is arranged between the first cone strip and the cone block, and a second transverse diversion trench is arranged between the second cone strip and the first cone strip;

The first cone strip is provided with a plurality of first diversion holes, and the second cone strip is provided with a plurality of second diversion holes.

Preferably, the cone group is provided with four groups.

Preferably, three first diversion holes are provided, and three second diversion holes are provided.

Preferably, the cone block has a cone block structure with a high top end and a low tail end.

Preferably, threads are respectively machined at two ends of the hanger body.

The beneficial effects of the utility model are as follows:

According to the liner hanger cone, the area of the flow passage is increased by adding the diversion trench and the diversion hole, so that turbulent displacement of cement paste is facilitated, cement paste displacement efficiency in the well cementation process can be effectively ensured, and well cementation quality is improved.

Drawings

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a top view of the present utility model;

FIG. 4 is a perspective view of a cone set;

FIG. 5 is a perspective view of the present utility model after being connected to a slip;

FIG. 6 is a top view of the present utility model after being connected to a slip;

FIG. 7 is a perspective view of the present utility model with slips and outer sleeve attached;

FIG. 8 is a top view of the present utility model with slips and an outer sleeve attached;

Wherein:

1-a hanger body; 2-cone blocks; 3-a first deflector aperture; 4-a first taper bar; 5-a second taper bar; 6-a second deflector aperture; 7-slips; 8-an outer sleeve;

Detailed Description

The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a liner hanger cone comprises a hanger body 1, wherein four cone groups are uniformly arranged on the periphery of the hanger body 1; adjacent cone groups are not closely spaced; the gap between adjacent cone groups is a flow passage area; threads are respectively machined at two ends of the hanger body 1.

As shown in fig. 4, the cone group comprises a cone block 2, a first cone strip 4 and a second cone strip 5 which are positioned above the cone block 2, and as shown in fig. 2, the cone block 2, the first cone strip 4 and the second cone strip 5 are axially distributed along the hanger body 1 from bottom to top, a first transverse diversion trench is arranged between the first cone strip 4 and the cone block 2, and a second transverse diversion trench is arranged between the second cone strip 5 and the first cone strip 4; as shown in fig. 4, the cone block 2 has a cone block structure with a high top and a low tail.

As shown in fig. 3 and 4, the first cone strip 4 is provided with three first diversion holes 3, and the second cone strip 5 is provided with three second diversion holes 6.

The using method comprises the following steps:

As shown in fig. 5 and fig. 6, the outer sleeve 8 is sleeved outside the hanger body 1, a plurality of slips 7 are arranged on the outer side of the cone 2 in a row, and as shown in fig. 7 and fig. 8, the cone set and the slips are embedded between the outer wall of the hanger body 1 and the inner wall of the outer sleeve 8.

The cone of the tail pipe hanger is sent to a preset position, after a sitting and hanging ball is thrown, the pressure is suppressed, fluid enters a hydraulic cylinder through a hanger body, when the pressure reaches preset parameters, a shear pin at the tail of the hydraulic cylinder is sheared off, the hydraulic cylinder is pushed to ascend, meanwhile, the hydraulic cylinder is pushed to synchronously ascend with the slips 7, and the slips 7 form self-locking between the inner wall of the outer sleeve 8 and the cone set, so that sitting and hanging are realized.

Fluid can flow through the flow area between adjacent cone sets; the fluid can also flow into the second transverse diversion trench through the three second diversion holes 6 arranged on the second conical strip 5, and then part of the fluid flows into the first transverse diversion trench from the three first diversion holes 3 arranged on the first conical strip 4, and part of the fluid flows out from the two sides of the first transverse diversion trench and the second transverse diversion trench;

Through increasing first water conservancy diversion hole and second water conservancy diversion hole to and first guiding gutter and second guiding gutter, increased the area of crossing the flow channel, be favorable to the grout to reach turbulent displacement, thereby can effectively guarantee the grout displacement efficiency in the well cementation process, and then improve well cementation quality.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. The liner hanger cone comprises a hanger body (1), and is characterized in that a plurality of cone groups are uniformly arranged on the periphery of the hanger body (1); adjacent cone groups are not closely spaced; the gap between adjacent cone groups is a flow passage area;

the cone group comprises a cone block (2), a first cone strip (4) and a second cone strip (5) which are positioned above the cone block (2), wherein the cone block (2), the first cone strip (4) and the second cone strip (5) are axially distributed along the hanger body (1) from bottom to top, a first transverse diversion trench is arranged between the first cone strip (4) and the cone block (2), and a second transverse diversion trench is arranged between the second cone strip (5) and the first cone strip (4);

The first cone strip (4) is provided with a plurality of first diversion holes (3), and the second cone strip (5) is provided with a plurality of second diversion holes (6).

2. A liner hanger cone according to claim 1, wherein said cone sets are provided with four sets.

3. A liner hanger cone according to claim 2, wherein the first deflector hole (3) is provided with three and the second deflector hole (6) is provided with three.

4. A liner hanger cone according to claim 3, wherein said cone blocks (2) are of a high top end and low tail end cone block configuration.

5. A liner hanger cone according to claim 4, wherein the hanger body (1) is threaded at each end.