CN215889972U

CN215889972U - Soluble bridge plug with oversized drift diameter

Info

Publication number: CN215889972U
Application number: CN202122411868.9U
Authority: CN
Inventors: 李栋; 张雨生; 刘国永; 魏荣兵
Original assignee: Puyang Donghao Mechanical & Electronic Co ltd
Current assignee: Puyang Donghao Mechanical & Electronic Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-02-22
Anticipated expiration: 2031-10-08

Abstract

The utility model relates to the technical field of oil and gas exploration and development, in particular to a soluble bridge plug with an oversized drift diameter. The lower end of the push cylinder is tightly abutted against the upper end of the expansion sleeve, a support sleeve is arranged in the expansion sleeve, an outer edge conical surface is machined at the lower end of the support sleeve, the lower end of the outer edge conical surface is outwards expanded, an inner edge conical surface is machined at the lower end of the expansion sleeve, the lower end of the inner edge conical surface is outwards expanded, the inner edge conical surface is attached to the outer edge conical surface, a pull rod is arranged in the push cylinder, the lower end of the pull rod is fixedly connected with the support sleeve, a sealing ring is sleeved on the upper portion of the outer edge of the expansion sleeve, a rubber sleeve is sleeved on the expansion sleeve above the sealing ring, the outer edge of the lower portion of the expansion sleeve is provided with a plurality of elongated grooves, the length direction of each elongated groove is parallel to the axial direction of the expansion sleeve, and a plurality of alloy columns are fixed on the outer edge of the expansion sleeve between every two adjacent elongated grooves. The utility model has the advantages of simple structure, convenient use, low manufacturing cost, reduced mining cost, convenient assembly and improved installation efficiency and well descending efficiency.

Description

Soluble bridge plug with oversized drift diameter

Technical Field

The utility model relates to the technical field of oil and gas exploration and development, in particular to a soluble bridge plug with an oversized drift diameter.

Background

In the process of oil and gas development, particularly in the development process of unconventional oil and gas, compact oil and gas, low-permeability oil and gas and the like, a large number of multi-stage staged fracturing technologies with perforating guns and bridge plugs are adopted, and the fracturing bridge plugs are used as isolation tools among various sections of construction.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing the soluble bridge plug with the ultra-large drift diameter, which has the advantages of simple structure, convenience in use, low manufacturing cost and convenience in assembly, and can improve the installation efficiency and the well descending efficiency.

In order to achieve the purpose, the utility model provides the technical scheme that:

a soluble bridge plug with an oversized drift diameter comprises a push cylinder, wherein an expansion sleeve is arranged below the push cylinder, the lower end of the push cylinder is tightly abutted against the upper end of the expansion sleeve, a support sleeve is arranged in the expansion sleeve, an outer edge conical surface is machined at the lower end of the support sleeve, the lower end of the outer edge conical surface expands outwards, an inner edge conical surface is machined at the lower end of the expansion sleeve, the lower end of the inner edge conical surface expands outwards, the inner edge conical surface is attached to the outer edge conical surface, a pull rod is arranged in the push cylinder, the lower end of the pull rod is fixedly connected with the support sleeve, a sealing ring is sleeved on the upper portion of the outer edge of the expansion sleeve, a rubber cylinder is sleeved on the expansion sleeve above the sealing ring, a plurality of elongated grooves are formed in the outer edge of the lower portion of the expansion sleeve, the length direction of each elongated groove is parallel to the axial direction of the expansion sleeve, and a plurality of alloy columns are fixed on the outer edge of the expansion sleeve between every two adjacent elongated grooves.

Specifically, the plurality of long grooves are uniformly distributed according to the circumference of the axis of the expansion sleeve.

Specifically, the pull rod is concentric with the push cylinder, the expansion sleeve and the support sleeve.

Specifically, a sealing groove is formed in the outer edge of the expansion sleeve, and the sealing ring is located in the sealing groove.

Specifically, the outer edge of the expansion sleeve above the sealing groove is provided with a ring groove, and the rubber cylinder is located in the ring groove.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model has the advantages of simple structure, convenient use, low manufacturing cost, reduced mining cost, convenient assembly and improved installation efficiency and well descending efficiency.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in figure 1, the soluble bridge plug with the ultra-large drift diameter comprises a push cylinder 1, wherein an expansion sleeve 2 is arranged below the push cylinder 1, the lower end of the push cylinder 1 is tightly abutted against the upper end of the expansion sleeve 2, a support sleeve 4 is arranged in the expansion sleeve 2, an outer edge conical surface 9 is processed at the lower end of the support sleeve 4, the lower end of the outer edge conical surface 9 is outwards expanded, an inner edge conical surface 10 is processed at the lower end of the expansion sleeve 2, the lower end of the inner edge conical surface 10 is outwards expanded, the inner edge conical surface 10 is attached to the outer edge conical surface 9, a pull rod 3 is arranged in the push cylinder 1, the pull rod 3 is concentric with the push cylinder 1, the expansion sleeve 2 and the support sleeve 4, a seal groove is formed in the outer edge of the expansion sleeve 2, a seal ring 7 is arranged in the seal groove, an annular groove is formed in the outer edge of the expansion sleeve 2 above the seal groove, a rubber sleeve 8 is arranged in the annular groove, a plurality of elongated grooves 5 are formed in the outer edge of the lower part of the expansion sleeve 2, and the elongated grooves 5 are uniformly distributed according to the circumference of the axis of the expansion sleeve 2, the length direction of the long grooves 5 is parallel to the axial direction of the expansion sleeve 2, and a plurality of alloy columns 6 are fixed on the outer edge of the expansion sleeve 2 between every two adjacent long grooves 5.

The soluble bridge plug with the oversized drift diameter is used for segmented transformation of oil and gas wells, can be matched with a conventional setting tool for use, is characterized in that the pull rod 3 is connected with the setting tool, the upper end of the push cylinder 1 is tightly abutted to the shell of the setting tool, and is lowered to a specified position through tools such as cables, oil pipes and steel wires, and then is set through the setting tool. After the soluble bridge plug with the oversized drift diameter is matched with a setting tool to enter a well together and reaches the designed setting depth, the setting tool is triggered to generate certain thrust, the certain thrust is transmitted to the expansion sleeve 2 through the push cylinder 1, the expansion sleeve 2 moves downwards, under the action of the conical surface 9 on the outer edge of the supporting sleeve 4, the lower end of the expansion sleeve 3 is forced to expand in advance, the expansion sleeve 2 is convenient to expand due to the long groove 5, the alloy column 6 bites the inner wall of the sleeve in advance, when the thrust continues to increase, the expansion sleeve 2 continues to expand continuously along with the downward movement process of the pull rod 3, so that the rubber sleeve 8 and the sealing ring 7 form initial sealing with the inner wall of the casing, the alloy column 6 is tightly anchored on the inner wall of the casing at the same time, the thrust provided by the setting tool continuously increases until the expansion sleeve 2 is completely separated from the support sleeve 4 and the push sleeve 1, the setting and releasing actions are completed, the expansion sleeve 2 is kept at the designed setting depth, and then the perforation operation is completed and the setting tool is recovered. And (3) throwing the soluble ball at the wellhead, pumping liquid by a pump truck to push the soluble ball to reach a setting position, sealing the soluble ball and the upper end of the expansion sleeve 2, and simultaneously displaying pressure rise by a ground instrument to show that the ball is in place, so that fracturing construction can be started. And when the total amount of the designed proppant is completely pumped into the stratum, completing fracturing construction, and repeating the steps until all the layer reconstruction is finished. After all the layers are transformed, the soluble bridge plug of the expansion sleeve 2 can be completely dissolved in the formation liquid, so that the inside of the shaft is unobstructed again.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The soluble bridge plug is characterized in that an expansion sleeve is arranged below the pushing sleeve, the lower end of the pushing sleeve is tightly abutted to the upper end of the expansion sleeve, a supporting sleeve is arranged in the expansion sleeve, an outer edge conical surface is machined at the lower end of the supporting sleeve, the lower end of the outer edge conical surface expands outwards, an inner edge conical surface is machined at the lower end of the expansion sleeve, the lower end of the inner edge conical surface expands outwards, the inner edge conical surface is attached to the outer edge conical surface, a pull rod is arranged in the pushing sleeve, the lower end of the pull rod is fixedly connected with the supporting sleeve, a sealing ring is sleeved on the upper portion of the outer edge of the expansion sleeve, a rubber sleeve is sleeved on the expansion sleeve above the sealing ring, a plurality of elongated grooves are formed in the outer edge of the lower portion of the expansion sleeve, the length direction of each elongated groove is parallel to the axial direction of the expansion sleeve, and a plurality of alloy columns are fixed on the outer edge of the expansion sleeve between every two adjacent elongated grooves.

2. The oversized-drift-diameter soluble bridge plug as recited in claim 1, wherein the plurality of elongated slots are uniformly distributed according to the axial circumference of the expansion sleeve.

3. The oversized-drift-diameter soluble bridge plug as recited in claim 1, wherein the pull rod is concentric with the push cylinder, the expansion sleeve and the brace sleeve.

4. The soluble bridge plug with the oversized drift diameter of claim 1, wherein a sealing groove is formed in the outer edge of the expansion sleeve, and the sealing ring is located in the sealing groove.

5. The soluble bridge plug of claim 4, wherein the outer edge of the expansion sleeve above the sealing groove is provided with a ring groove, and the rubber cylinder is located in the ring groove.