Motor driven worm gear transmission underground sleeve valve

A motor-driven, casing valve technology, applied in wellbore/well valve devices, wellbore/well parts, earthwork drilling and production, etc., can solve high-risk faults and other problems, achieve the effect of reducing fault sources and easy operation

Inactive Publication Date: 2011-06-22
CNPC GREATWALL DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will have a certain negative impact on normal drilling operations
On the other hand, capillary pipelines are generally only used as short tubes with a length of a few meters, so the use of nearly a thousand meters of high-pressure capillary oil pipelines in drilling wells is itself a high-risk source of failure.

Method used

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  • Motor driven worm gear transmission underground sleeve valve
  • Motor driven worm gear transmission underground sleeve valve
  • Motor driven worm gear transmission underground sleeve valve

Examples

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Embodiment Construction

[0021] Such as figure 1 As shown, the switch action of the downhole casing valve tongue is all commanded by the ground computer through the keyboard or mouse, and the command signal is transmitted to the downhole single-chip control system through the interface box through the cable, and at the same time, the power is transmitted to the downhole system through the interface box. After receiving the control signal from the ground, the downhole single-chip microcomputer control system sends out a motor drive signal to control the positive and negative rotation of the motor. At the same time, the single-chip microcomputer control system regularly samples the parameter values ​​of the pressure sensor, the valve tongue fully open position sensor and the valve tongue fully closed position sensor, and converts the parameter signals to the ground through the cable. This keeps the surface computer in the process of monitoring the downhole casing valve status in real time.

[0022] Suc...

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Abstract

The invention relates to the field of petroleum engineering under-balance drilling, in particular to a motor driven worm gear transmission underground sleeve valve. The outer side of a main body eccentric cylinder (5) of the sleeve valve is provided with two elongated slots, namely an electronic chamber (21) and a driving chamber (55); the inner side of the lower half part of the main body eccentric cylinder (5) is provided with a valve clack switching cylinder (13); an electronic component (22), a printed circuit board (23) and a connecting signal wire (25) are arranged in the electronic chamber (21); the middle section of the electronic chamber (21) is provided with two Hall sensors; the inner upper part of the driving chamber (55) is provided with a rubber corrugated pipe skeleton (42); the rubber corrugated pipe skeleton (42) is connected with a driving assembly shell (50); and a motor winding connector lug (46), a motor (47), a multistage reduction box (48), a worm upper bearing (49) and a mechanical sealing assembly (52) are arranged in the driving assembly shell (50) in a transmission order. The sleeve valve of the invention is simple and convenient for operation, and reduces fault sources.

Description

Technical field: [0001] The invention relates to the field of petroleum engineering underbalanced drilling, in particular to a downhole casing valve driven by a motor and driven by worm gears. Background technique: [0002] At present, the downhole casing valve used in oil field underbalanced drilling, the switch mode of the valve tongue is to connect two hydraulic capillary oil pipelines to the switch hydraulic chamber of the downhole casing valve by the ground hydraulic control cabinet, and through the ground to the hydraulic control cabinet. The operation makes one of the two hydraulic capillary tubing pass high pressure to realize the opening and closing of the valve tongue of the downhole casing valve. The wellhead operation and the downhole operation during the installation of this type of downhole casing valve are bothersome. This will have a certain negative impact on normal drilling operations. On the other hand, capillary pipelines are generally only used as shor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/14E21B34/16
Inventor 吴智中余雷俞晨刘宏丽
Owner CNPC GREATWALL DRILLING ENG
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