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Metallic seal solvable bridge plug

A metal sealing and soluble bridge technology, used in sealing/isolation, wellbore/well components, earth-moving drilling, etc., can solve the problems of not easy to dissolve, block wellbore, large volume of soluble glue tube, etc., to improve friction force, good axial positioning effect, good axial positioning effect

Pending Publication Date: 2019-07-12
FIVE STAR DOWNHOLE SERVICE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Due to the large volume of the soluble gel cartridge, it is not easy to dissolve completely;
[0004] 2. When the bridge plug is dissolved, the soluble metal body will complete the dissolution before the soluble rubber cylinder, resulting in the undissolved rubber cylinder losing the fixation of the metal body, and will accumulate together to block the wellbore during the discharge and flowback

Method used

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  • Metallic seal solvable bridge plug
  • Metallic seal solvable bridge plug
  • Metallic seal solvable bridge plug

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1 to Figure 3 As shown, this embodiment provides a metal-sealed soluble bridge plug, including a lead 1, a slip 2, a ball seat 3 and a soluble ball 4, and the slip 2 includes an extruded end 2.1 that abuts against the lead 1 and The tapered extrusion cavity 2.2 closely matched with the outer wall of the ball seat 3, the leader 1, the slips 2 and the ball seat 3 are closely matched in turn to form a bridge plug body, the inside of the ball seat 3 communicates with the inside of the slip 2 to form a central hole 15, The central hole 5 is provided with a soluble ball support platform 6 that cooperates with the soluble ball 4 to achieve the sealing effect on the central hole 15; The upper end of the bridge plug abuts against, and the sealing mechanism 7 plays the role of sealing the annular space between the ball seat 3 and the casing in the well after the bridge plug setting is completed.

[0037] Because the outer wall of the ball seat 3 is closely matche...

Embodiment 2

[0042] This embodiment is optimized and defined on the basis of the above-mentioned embodiment 1.

[0043] In order to achieve a better sealing effect, the inner and outer walls of the sealing mechanism 7 are respectively provided with an inner sealing ring 10 and an outer sealing ring 11, which play a double sealing role and have high sealing reliability. There is an annular groove, and the inner sealing ring 10 and the outer sealing ring 11 are embedded in the corresponding annular groove.

[0044] Specifically, the inner and outer walls of the sealing mechanism 7 are provided with anti-slip lines, and the inner sealing ring 10 and the outer sealing ring 11 are both arranged on the inner and outer walls of the upper end of the sealing mechanism 7 .

[0045] The inner sealing ring 10 and the outer sealing ring 11 are made of soluble rubber or conventional insoluble rubber.

Embodiment 3

[0047] This embodiment is optimized and defined on the basis of the above-mentioned embodiment 2.

[0048] The second center hole 12 inside the leader 1 communicates with the first center hole 5 and the axes of the two are consistent. The second center hole 12 is provided with a detachable fastening member for a detachable fixed connection with the adapter 9 .

[0049] Specifically, the upper end of the leader 1 is provided with an inner convex ring 13 and an outer boss 14, the outer diameter of the inner convex ring 13 is smaller than the outer diameter of the outer boss 14, and the inner convex ring 13 is close to the central hole 12 by the outer boss 14. The inner edge of the slips 2 extends vertically upwards, the extruding end 2.1 of the slip 2 is pressed against the outer boss 14, the outer diameter of the extruding end 2.1 is smaller than the outer diameter of the outer boss 14, and the inner convex ring 13 is located in the central hole-5 Inside, the minimum inner diam...

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Abstract

The invention belongs to the technical field of bridge plugs, and discloses a metallic seal solvable bridge plug. The metallic seal solvable bridge plug includes a leader, a slip, a ball seat and a solvable ball. The slip includes a squeezing end abutting against the leader and a taper squeezing cavity tightly matched with the outer wall of the ball seat. The leader, the slip and the ball seat aretightly matched with one another successively to form a bridge plug body. The inner part of the ball seat is in communication with the inner part of the slip to form a first central hole. The first central hole is internally provided with a solvable ball supporting platform which is matched with the solvable ball to achieve the closed effect on the first central hole. A sealing mechanism furthersleeves the ball seat. The lower end of the sealing mechanism abuts against the upper end of the slip. According to the metallic seal solvable bridge plug, fracturing operation efficiency can be effectively improved, the risk of pit shaft plugging is eliminated, the structure is compact, and performance stability of the solvable bridge plug is improved.

Description

technical field [0001] The invention belongs to the technical field of bridge plugs, in particular to a metal-sealed soluble bridge plug. Background technique [0002] In the field of petroleum industry, packers or bridge plugs are usually used to achieve isolation between layers and other processes. The role of bridge plugs is to seal layers of oil and gas wells. It has the characteristics of fewer construction procedures, accurate sealing positions, and large-scale fracturing. In the field of oil and gas field fracturing stimulation technology, the use of soluble bridge plugs for fracturing stimulation is a new generation of technology that is gradually adopted. After the soluble bridge plug is completely dissolved, it can reach the full diameter of the wellbore, which is beneficial to the subsequent production and workover operations. However, since the current conventional soluble bridge plug uses a soluble rubber cartridge as the sealing mechanism, there are the follow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/134
CPCE21B33/134
Inventor 方廖生
Owner FIVE STAR DOWNHOLE SERVICE INC
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