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Method and device for under-shaft releasing

A technology of sealing section and tie rod, which is used in drilling equipment, earthwork drilling, wellbore/well components, etc., to achieve the effect of convenient connection, simple structure and precise control

Active Publication Date: 2017-10-27
贵州航天凯山石油仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cable direct-reading plugging tool can be used to completely block any position in the pipe string during the construction under pressure, but the cable direct-reading plugging tool needs a fast, reliable and accurate hands-off structure. After the plugging is completed Achieving a separation between the delivery instrument and the plugging seal section, which cannot be met by the existing technology

Method used

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  • Method and device for under-shaft releasing
  • Method and device for under-shaft releasing
  • Method and device for under-shaft releasing

Examples

Experimental program
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Effect test

Embodiment

[0026] In this example, the pull rod 9, the connecting rod 8, and the slider 7 are hinged through a pin shaft 19 to form a linkage mechanism. A connecting rod groove 6 is radially opened on the top of the sealing section 1, and the connecting rod groove 6 is a through groove. The middle part of the pull rod 9 is fixed on the outer tube of the sealing section 1 through a pin shaft 19, and the pull rod 9 can rotate around the pin shaft 19. The outer tube of the delivery instrument 2 is provided with a pull rod groove 3 and a bayonet 4, and the hook 10 at the top of the pull rod 9 can be inserted into the inside of the outer tube of the delivery instrument 2, and is connected to the radially upward bayonet 4 of the outer tube of the delivery instrument 2. Hook the surface, stage clip 18 locks the mechanism, and pull rod 9 tightens the delivery instrument 2 outer tube to complete the connection of the delivery instrument 2 and the sealing section 1. Hand-losing process: the rot...

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Abstract

The invention discloses a method and device for under-shaft releasing. According to the invention, a motor shaft in a delivery instrument is used to drive a screw rod on the axis of a blocked and sealed section to rotate, the screw rod is matched with a push block in the blocked and sealed section in a threaded pair coordinated manner, and rotation of the screw rod is converted to axial upward motion of the push block; and the push block pushes a slide block in the blocked and sealed section to move upwards, the slide block pushes a pull rod hinged with the blocked and sealed section to rotate y a connecting rod, the bottom end of the pull rod can be expanded outwards, a lamp hook on the top end of the pull rod will shrink inwards, and the clamp hook on the top end of the pull rod can be separated from a clamp hole in the delivery instrument, so that releasing operations are achieved. According to the invention, releasing is completed through electric control; the control is accurate; and the releasing is rapid, accurate and reliable. According to the invention, the releasing joint structure is simple; and the delivery instrument is connected to the blocked and sealed section easily and conveniently.

Description

technical field [0001] The invention relates to a downhole throwing method and device, and belongs to the technical field of separation between a delivery instrument and a plugging and sealing section when plugging a pipe string during a water injection well operation under pressure. Background technique [0002] Oilfield snubbing operation is an advanced downhole operation technology that maintains a certain pressure in the wellbore and trips the pipe string without snubbing or releasing pressure. When water injection wells operate under pressure, the overflow volume is relatively large, and it is necessary to contain the wellbore overflow during operation, and the pipe string plugging technology is mainly used. The cable direct-reading plugging tool can be used to completely block any position in the pipe string during the construction under pressure, but the cable direct-reading plugging tool needs a fast, reliable and accurate hands-off structure. After the plugging i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B23/06E21B17/06
CPCE21B17/06E21B23/06Y02E10/10
Inventor 罗玉林张小波
Owner 贵州航天凯山石油仪器有限公司
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