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Soluble ball seat capable of increasing dissolving speed

A technology of dissolution rate and ball seat, applied in the fields of production fluids, wellbore/well components, earthwork drilling, etc., can solve the problems of slow dissolution rate, large rubber length and volume, etc., to prevent loss, reduce metal volume, Volume reduction effect

Pending Publication Date: 2021-04-27
SICHUAN WELDON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The soluble bridge plugs in the prior art usually adopt a compressed rubber-type sealing method, which makes the required length and volume of the rubber larger. The length of the bridge plug structure is more than 400mm, and the dissolution rate of the soluble bridge plug is not only affected by the dissolution rate of the material itself, but also by the volume of the metal and rubber; based on this, we provide a method to increase the dissolution rate Soluble ball seat, the soluble ball seat is formed on the basis of the original soluble bridge plug through various structural upgrades and optimizations to solve the above-mentioned problem of slow dissolution speed

Method used

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  • Soluble ball seat capable of increasing dissolving speed
  • Soluble ball seat capable of increasing dissolving speed
  • Soluble ball seat capable of increasing dissolving speed

Examples

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Effect test

Embodiment 1

[0032] refer to figure 1 , 5 and 6, the present embodiment provides a dissolvable ball seat that improves the dissolution rate, including a central tube 1, a cone 6, a slip body 8 and an anti-collision ring 9 that are sequentially connected from top to bottom, and the external center tube 1 The thread is connected with the inner thread of the lock ring 7, and the inner thread of the cone 6 is connected with the outer thread of the lock ring 7; the central tube 1 has an outer tapered surface, and the central tube 1 is sequentially provided with the upper wrist guard 2, sealing Rubber 3, lower wrist guard 4 and support seat 5, slip teeth 12 are installed circumferentially on the slip body 8, and the slip teeth 12 are helical teeth, and the tip of the slip teeth 12 faces below the ball seat when assembled.

[0033] The lower wrist guard 4 and the support seat 5 are fitted on an inclined plane. At the same time, the lower wrist guard 4 and the support seat 5 are respectively slit...

Embodiment 2

[0038] This embodiment is further preferred on the basis of Embodiment 1, refer to figure 1 , 3 And 4, the inner tapered surface of the slip body 8 cooperates with the outer tapered surface of the cone 6, and the split pin 11 is evenly installed on the cone 6, and the split pin 11 is opened with the upper end of the slip body 8 The lower end of the slip body 8 is evenly provided with split grooves 18 in the circumferential direction, and cooperates with the split protrusions 19 provided on the upper end of the anti-collision ring 9 .

[0039]In the present invention, by adding the split pin 11 and the split protrusion 19, during the ball seat setting process, the effective split of the slips can be ensured, and the slip body 8 can be evenly opened along the slit, avoiding jamming. The tile body 8 prevents the "C shape" from opening, which can greatly improve the anchoring ability of the slips.

Embodiment 3

[0041] This embodiment is further preferred on the basis of Embodiment 1, refer to figure 1 , The upper part of the slip body 8 is provided with an annular groove in the circumferential direction, and a rectangular ring 10 is arranged in the annular groove, and the rectangular ring 10 is made of soluble rubber material.

[0042] After the ball seat is set, the slips partly crawl along the slope of the cone 6 to the inner wall of the anchor sleeve, and the resilience of the rectangular ring 10 itself provides a pullback force for the slips, which cooperates with the cone 6 to form a triangular force relationship, which promotes The slip body 8 fits the inner wall of the casing, which can solve the problem of slip fall in a single slip structure.

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Abstract

The invention discloses a soluble ball seat capable of increasing the dissolving speed, and relates to the technical field of soluble bridge plugs. The soluble ball seat is used for upgrading and optimizing the structure of an original soluble bridge plug so as to solve the problem that the dissolving speed of the soluble bridge plug is low. The soluble ball seat comprises a central pipe, a cone, a slip body and an anti-collision ring which are sequentially connected from top to bottom, wherein the central pipe is provided with an outer conical surface and sequentially sleeved with an upper wrist guard, a sealing rubber sheet, a lower wrist guard and a supporting seat; and slip teeth are mounted in the circumferential direction of the slip body. The soluble ball seat is of a single-slip structure, and a sealing rubber sheet expansion sealing mode is adopted, so that on the basis of guaranteeing the sealing performance, the length of the ball seat is greatly decreased, the volume of soluble metal and rubber is reduced, and the dissolving speed of the soluble ball seat can be effectively increased.

Description

technical field [0001] The invention relates to the technical field of soluble bridge plugs, in particular to a soluble ball seat for improving dissolution speed. Background technique [0002] In the field of oil and gas industry, bridge plugs or packers are often used to isolate fracturing layers to implement large-scale fracturing and stimulation operations, especially for staged sanding fracturing of tight oil and gas and shale gas horizontal wells ;The bridge plug can also be called a packer. The function of the plug and the packer is basically the same when used as a sectional tool, but the structure is simpler and more compact than the packer. In recent years, dissolvable bridge plugs have been used for Fracturing and stimulation operations are gradually being widely used. Dissolvable bridge plugs have the characteristics of self-dissolution, complete well opening, and no need for secondary manual intervention, which is beneficial to later production and workover opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/12E21B33/129E21B43/26
CPCE21B33/12E21B33/1291E21B43/26
Inventor 何伟刘严张其平易建国何明山高凤垒
Owner SICHUAN WELDON CHEM
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