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A Mechanical Downhole Multiple Switch Bypass Valve

A bypass valve, mechanical technology, applied in the direction of wellbore/well valve device, wellbore/well parts, sealing/isolation, etc., can solve the problem of unobvious pressure, achieve clear pressure, easy to hold pressure, The effect of avoiding well control risks

Active Publication Date: 2021-10-15
SICHUAN PETROZHR PETROLEUM MASCH ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that the pressure when the bypass hole is open and the bypass hole is closed is not obvious, resulting in well control risks

Method used

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  • A Mechanical Downhole Multiple Switch Bypass Valve
  • A Mechanical Downhole Multiple Switch Bypass Valve
  • A Mechanical Downhole Multiple Switch Bypass Valve

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Embodiment Construction

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without...

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Abstract

The invention discloses a mechanical downhole multiple switch bypass valve, which belongs to the technical field of oil and gas exploitation. The problem of well control risk in the prior art is solved. The present invention comprises a bypass valve body. A valve seat is arranged inside the bypass valve body. The valve seat is slidingly connected with the bypass valve body. The valve seat is provided with a valve seat side hole. Bypass hole, the position of the bypass hole corresponds to the side hole of the valve seat, a spring is provided between the valve seat and the body of the bypass valve, and a ball seat is provided on the valve seat, and the ball seat is a multi-lobed ball seat A steel ball is matched with the ball seat, and a closing steel ball is matched with the side hole of the valve seat. The invention avoids the risk of well control caused by the influence of temperature, pressure and different mud on the rubber ball; when the steel ball passes through the multi-lobed ball seat, the pressure is clear, and the ground is easy to monitor whether the bypass hole is closed, thereby avoiding the risk of well control. After the basketball basket collects the steel balls, it can leave a channel for other small balls or cables to pass through, which is convenient for subsequent construction.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploitation, and in particular relates to a mechanical downhole multiple switch bypass valve. Background technique [0002] The downhole multiple switch bypass valve is a tool for direct plugging and wellbore cleaning operations without tripping during drilling, completion and workover stages. Its most notable feature is plugging while drilling, protecting downhole instruments, shortening the drilling cycle, and reducing the risk of well control. [0003] At present, there are two kinds of downhole multiple switch bypass valves commonly used in the world. The first one is the BPL structure (international patent needs to be checked). The principle is to put in a rubber ball to push the valve seat down to open the bypass hole. Carry out the plugging operation, and then put in two small steel balls to block the bypass hole and hold the pressure, causing the rubber ball to deform, and the two sm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/14
CPCE21B34/142
Inventor 刘鹏王书忠张鸿刚
Owner SICHUAN PETROZHR PETROLEUM MASCH ENG CO LTD