CN219281703U

CN219281703U - External reversing setting mechanism and unidirectional slip supporting setting packer

Info

Publication number: CN219281703U
Application number: CN202320429204.1U
Authority: CN
Inventors: 朱甜甜; 朱荣; 靳庆珍; 孙永祥; 许祥红
Original assignee: YANCHENG XINYUAN PETROCHEMICAL MACHINERY CO Ltd
Current assignee: YANCHENG XINYUAN PETROCHEMICAL MACHINERY CO Ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-06-30
Anticipated expiration: 2033-03-09

Abstract

The utility model provides an external reversing setting mechanism and a unidirectional slip supporting setting packer, which belong to the technical field of oil and gas exploitation in oil fields, wherein the external reversing setting mechanism comprises a centralizing sleeve, a centralizing body and a hook body, the centralizing sleeve is movably sleeved on a central pipe, and an annular groove is formed in the periphery of the centralizing sleeve; the plurality of centralizing bodies are assembled along the annular groove in an annular mode and positioned through the compression ring, and centralizing body springs are arranged between the centralizing bodies and the centralizing sleeve; the hook body is connected with the centralizing sleeve through threads, and J-shaped hooks which are distributed in pairs are arranged on the hook body. The unidirectional slip supporting setting packer comprises a central pipe, an upper joint, a lower joint, a sealing mechanism, an anchoring mechanism and an external reversing setting mechanism. The external J-shaped hook is not limited by external space, ground reversing is easy to observe, and reversing is not influenced by well deviation and well depth; the hook groove of the J-shaped hook is exposed, and pit shaft gravel and dirt cannot be deposited in the hook groove under the impact of pit shaft fluid, so that sand prevention can be effectively achieved.

Description

External reversing setting mechanism and unidirectional slip supporting setting packer

Technical Field

The utility model belongs to the technical field of oil and gas exploitation in oil fields, and particularly relates to an external reversing setting mechanism, and in addition, the utility model also relates to a one-way slip supporting setting packer.

Background

The Y221 type packer is a packer with unidirectional slips supporting a rotary tubular column to be set, is used in the processes of layered oil extraction, testing, water finding, water blocking, acidification and the like, and is easy to set and unset and simple to operate.

In carrying out the present utility model, the inventors have found that the existing Y221 packer has at least the following drawbacks:

the existing Y221 packer setting reversing mechanism is of a built-in structure, is limited by well deviation and well depth when working underground, and is easy to cause the phenomenon of poor reversing, so that the setting process fails or the packer cannot be completely unset in the unset process; in addition, if the wellbore contains sand, it can also result in gravel and dirt being present in the internal set diverter grooves, which can lead to diverter failure.

Disclosure of Invention

Based on the background problem, the utility model aims to provide an external reversing setting mechanism, wherein an external J-shaped hook is not limited by an external space, the ground reversing is easy to observe, and the reversing is not influenced by well deviation and well depth reasons; in addition, the hook groove of the J-shaped hook is exposed, and pit shaft gravel and dirt cannot be deposited in the hook groove under the impact of pit shaft fluid, so that sand prevention can be effectively achieved. Another object of the utility model is to provide a one-way slip supported set packer.

In order to achieve the above object, on one hand, the technical solution provided by the embodiment of the present utility model is:

external switching-over setting mechanism includes:

the centering sleeve is movably sleeved on the central tube, and an annular groove is formed in the periphery of the centering sleeve;

the centering bodies are annularly assembled along the annular grooves and positioned through compression rings, and centering body springs are arranged between the centering bodies and the centering sleeve;

the hook body is connected with the centralizing sleeve through threads, and J-shaped hooks which are distributed in pairs are arranged on the hook body.

Preferably, the middle area of the centralizing body protrudes into a trapezoid and extends out of the annular groove, press edges are formed on two sides of the centralizing body, and the press ring hoops are arranged at the joint of the press edges and the centralizing sleeve.

Preferably, a plurality of groups of centering body springs are arranged between each centering body and each centering sleeve, and the plurality of groups of centering body springs are distributed along the axial direction.

Preferably, a clamping groove for embedding the centering body spring is formed in the inner wall of the centering body.

In another aspect, an embodiment of the present utility model provides a one-way slip supported set packer comprising: the device comprises a central tube, an upper joint, a lower joint, a sealing mechanism, an anchoring mechanism and the external annular setting mechanism.

Preferably, the lower joint is connected with the central tube through threads, a bump is arranged on the periphery of the lower joint, and the bump is movably embedded into a hook groove of the J-shaped hook.

Preferably, the sealing mechanism comprises:

the rubber cylinder I, the rubber cylinder II and the rubber cylinder III are sleeved in sequence along the axial direction of the central tube, a spacing ring I is arranged between the rubber cylinder I and the rubber cylinder II, and a spacing ring II is arranged between the rubber cylinder II and the rubber cylinder III;

the pressure-bearing sleeve is sleeved on the central tube and is propped against the edge of the rubber cylinder III;

the cone is sleeved on the central tube and is abutted with the pressure-bearing sleeve.

More preferably, the lengths of the rubber cylinder I and the rubber cylinder III are larger than the length of the rubber cylinder II.

Preferably, the anchoring mechanism comprises:

the plurality of slips are arranged and annularly distributed around the central pipe, and grooves are formed in the slips;

and the slip spring is accommodated in the groove and is fixed through the slip seat.

Preferably, the upper joint is connected with the central tube through threads, and an adjusting nut is sleeved on the upper joint.

Compared with the prior art, the embodiment of the utility model has at least the following effects:

1. the J-shaped hook of the external reversing setting mechanism is free from the limitation of external space because the hook groove is exposed outside, the lug on the lower joint can be more reliably screwed into the hook groove when setting, the ground reversing is easy to observe, and the setting process is easy to judge; after entering the well, the reversing of the convex block is not influenced by the reasons of well inclination and well depth, so that the downhole setting is facilitated; in addition, the hook groove of the J-shaped hook is exposed, pit shaft gravel and dirt cannot be deposited in the hook groove under the impact of pit shaft fluid, sand can be effectively prevented, and the situation that the packer is in failure in reversing due to sand production of the pit shaft or dirt adhesion in the groove in the setting process, so that setting failure or unsetting is blocked is avoided; in addition, as the J-shaped hooks are exposed, the track curve of the J-shaped hook grooves is better controlled, the processing curve is smooth and flat, and the lugs are better reversed in the underground setting process.

2. According to the utility model, a plurality of groups of centering body springs are arranged between each centering body and each centering sleeve, the plurality of groups of centering body springs are distributed along the axial direction, and the inner wall of the centering body is provided with the clamping grooves for embedding the centering body springs so as to prevent the centering body springs from radial deflection, thereby ensuring the stable compression of the centering body springs.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of an external reversing setting mechanism in embodiment 1 of the present utility model;

FIG. 2 is a schematic view of a J-hook of example 1 of the present utility model;

FIG. 3 is a schematic view of a one-way slip-supported set packer according to example 2 of the present utility model;

fig. 4 is a partial enlarged view at a in fig. 3.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," "outer," "front," "rear," and the like indicate an azimuth or a positional relationship based on that shown in the drawings of the specification, and are merely for convenience of description and to simplify the description, but do not indicate or imply that the apparatus or elements to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Example 1

In order to solve the problem that the internal reversing setting mechanism of the existing Y221 type packer has poor reversing, this embodiment provides an external reversing setting mechanism, as shown in fig. 1, including: a centralizing sleeve 1, a centralizing body 2 and a hook body 3.

The centralizing sleeve 1 is movably sleeved on the central pipe 100, and an annular groove 101 is formed in the periphery of the centralizing sleeve 1.

The centering bodies 2 are arranged in a plurality, the centering bodies 2 are assembled at the annular groove 101, the centering bodies 2 are distributed annularly around the centering sleeve 1, a plurality of groups of centering body springs 4 are arranged between each centering body 2 and the centering sleeve 1, and the centering body springs 4 are distributed axially along the centering sleeve 1 to ensure stable movement of the centering bodies 2.

The righting body 2 of this embodiment is specifically disposed at the open end of the annular groove 101, at this time, in order to fix the righting body 2, in this embodiment, a pressing ring 5 is sleeved at the joint of the righting body 2 and the righting sleeve 1, and under the cooperation of the pressing ring 5 and the righting body spring 4, the righting body 2 can be movably disposed at the annular groove 101.

In order to prevent the centering body spring 4 from radially shifting, in this embodiment, the inner wall of the centering body 2 is provided with a clamping groove 201, the clamping grooves 201 are in one-to-one correspondence with the centering body spring 4, at this time, one end of the centering body spring 4 is abutted against the groove wall of the annular groove 101, and the other end is embedded into the clamping groove 201 and abutted against the groove wall of the clamping groove 201.

The hook body 3 is connected with the centralizing sleeve 1 through threads, and taking fig. 1 as an example, the hook body 3 is specifically sleeved on the right side of the centralizing sleeve 1; j-shaped hooks 301 are distributed on the hook body 3 in pairs and are used for realizing reversing setting under the action of torque, and a schematic diagram of the hook body 3 is shown in fig. 2.

When the external reversing setting mechanism of the embodiment is assembled, the lug 200-1 on the lower joint 200 can be positioned in the hook groove of the J-shaped hook 301, and torque is transmitted to the packer through the lug 200-1, so that reversing and setting are realized.

The J-shaped hook in the embodiment is free from the limitation of external space because the hook groove is exposed, the lug on the joint can be more reliably screwed into the hook groove when in setting, ground reversing is easy to observe, whether the setting process is reliable or not is easy to judge, after the well is put into the well, the lug reversing is not influenced by well inclination and well depth reasons, and the downhole setting is facilitated; in addition, the hook groove of the J-shaped hook is exposed, pit shaft gravel and dirt cannot be deposited in the hook groove under the impact of pit shaft fluid, sand can be effectively prevented, and the situation that the packer is in failure in reversing due to sand production of the pit shaft or dirt adhesion in the groove in the setting process, so that setting failure or unsetting is blocked is avoided; in addition, as the J-shaped hooks are exposed, the track curve of the J-shaped hook grooves is better controlled, the processing curve is smooth and flat, and the lugs are better reversed in the underground setting process.

Example 2

The one-way slip-supported setting packer, as shown in FIG. 3, includes a base pipe 100, a lower sub 200, an upper sub 300, a sealing mechanism 400, an anchoring mechanism 500, and the external reverse setting mechanism of example 1.

In this embodiment, the lower joint 200 is screwed with the central tube 100, and as shown in fig. 3, the lower joint 200 is sleeved at the right end of the central tube 100. The outer circumference of the lower connector 200 is provided with a bump 200-1, and the bump 200-1 is movably inserted into a hook groove of the J-shaped hook 301.

In this embodiment, the upper joint 300 is screwed with the central tube 100, and as shown in fig. 3, the upper joint 300 is sleeved at the left end of the central tube 100.

The upper joint 300 is further sleeved with an adjusting nut 300-1, specifically, the inner diameter of the adjusting nut 300-1 is of a reducing structure, and taking fig. 3 as an example, the left inner diameter of the adjusting nut 300-1 is larger than the right inner diameter, at this time, the right inner wall of the adjusting nut 300-1 abuts against the central tube 100, the left inner wall abuts against the upper joint 300, that is, the right side of the upper joint 300 is inserted into the left cavity of the adjusting nut 300-1 and is in threaded connection with the adjusting nut 300-1.

In this embodiment, the sealing mechanism 400 includes a rubber cylinder I400-1, a rubber cylinder II 400-2, a rubber cylinder III 400-3, a bearing sleeve 400-4 and a cone 400-5.

The rubber cylinder I400-1, the rubber cylinder II 400-2 and the rubber cylinder III 400-3 are sequentially sleeved along the axial direction of the central tube 100, a spacing ring I400-6 is arranged between the rubber cylinder I400-1 and the rubber cylinder II 400-2, and a spacing ring II 400-7 is arranged between the rubber cylinder II 400-2 and the rubber cylinder III 400-3. Specifically, the lengths of the rubber cylinder I400-1 and the rubber cylinder III 400-3 are both larger than the length of the rubber cylinder II 400-2.

The pressure-bearing sleeve 400-4 is sleeved on the central tube 100, and can be positioned by a slotted hole arranged on the central tube 100, and taking fig. 3 as an example, the pressure-bearing sleeve 400-4 is arranged on the right side of the rubber tube III 400-3 and is propped against the edge of the rubber tube III 400-3. Specifically, the bearing sleeve 400-4 has a variable diameter structure, and the outer diameter of the right side of the bearing sleeve 400-4 is smaller than the outer diameter of the left side.

The cone 400-5 is sleeved on the central tube 100 and is in abutting connection with the bearing sleeve 400-4, specifically, taking fig. 3 as an example, the left side of the cone 400-5 is sleeved on the small outer diameter section on the right side of the bearing sleeve 400-4.

In this embodiment, the anchoring mechanism 500 includes a slip 500-1 and a slip spring 500-2, and as illustrated in fig. 3, the anchoring mechanism 500 is disposed on the right side of the sealing mechanism 400 and spaced apart from the sealing mechanism 400.

As shown in fig. 3 and 4, a plurality of slips 500-1 are provided, the slips 500-1 are distributed annularly around the central pipe 100, and grooves 500-1-1 are formed in the slips 500-1; the slip spring 500-2 is accommodated in the groove 500-1-1 and is fixed through the slip seat 500-3, the slip spring 500-2 is beneficial to flexible movement of the slip 500-1, and the maximum opening outer diameter size is limited; external fixation is also achieved in this embodiment and by slip bowl 500-3.

The working principle of the unidirectional slip support setting packer of the embodiment is as follows:

in a free state, the lug 200-1 on the lower joint 200 is positioned in the hook groove of the J-shaped hook 301, and the relative position of the central tube 100 and the reversing setting mechanism is kept unchanged; after the tubing string is lowered to the design position, the tubing string is lifted up, the tubing string is rotated right, and the lug 200-1 on the lower joint 200 is rotated out of the hook groove of the J-shaped hook 301 under the friction action of the righting body 2 and the sleeve; and continuing to lower the tubing string, and descending the components such as the central tube 100, the lower joint 200 and the like, expanding the slips 500-2, compressing the rubber cylinder I400-1, the rubber cylinder II 400-2 and the rubber cylinder III 400-3 to finish the setting process.

When the packer is required to be started, only the tubing string is required to be lifted, the lug 200-1 on the lower joint 200 enters the hook groove of the J-shaped hook 301 under the friction force of the righting body 2 and the casing, and the whole packer is started.

It should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present utility model.

Claims

1. External switching-over setting mechanism, its characterized in that includes:

2. The externally-arranged reversing setting mechanism according to claim 1, wherein the middle area of the righting body protrudes into a trapezoid and extends out of the annular groove, press edges are formed on two sides of the righting body, and the press ring hoops are arranged at the joint of the press edges and the righting sleeve.

3. The external reversing setting mechanism of claim 1, wherein a plurality of sets of centralizer springs are provided between each centralizer and the centralizer sleeve, and wherein the plurality of sets of centralizer springs are axially distributed.

4. The external reversing setting mechanism according to claim 1, wherein a clamping groove for embedding the centering body spring is formed in the inner wall of the centering body.

5. One-way slips support setting packer, its characterized in that includes: a base pipe, an upper joint, a lower joint, a sealing mechanism, an anchoring mechanism and an external reversing setting mechanism according to any one of claims 1 to 4.

6. The one-way slip-supported setting packer of claim 5, wherein the lower joint is in threaded connection with the center tube, a bump is arranged on the periphery of the lower joint, and the bump is movably embedded into a hook groove of the J-shaped hook.

7. The one-way slip supported set packer of claim 5, wherein the sealing mechanism comprises:

8. The one-way slip supported set packer of claim 7, wherein the length of both the packing element I and the packing element III is greater than the length of the packing element II.

9. The one-way slip supported set packer of claim 5, wherein the anchoring mechanism comprises:

10. The one-way slip-supported set packer of claim 5, wherein the upper fitting is threadably connected to the center tube and the upper fitting is sleeved with an adjustment nut.