Hinge type driving retraction and push mechanism for externally hanging BH-VDT tool

A BH-VDT, hinged technology, applied in the direction of measurement, wellbore/well components, earthwork drilling and production, etc., can solve the problem of large elasticity of the disc spring

Pending Publication Date: 2020-10-30
CNPC BOHAI DRILLING ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This product has formed 12 1 / 4 "~22" series products, initially the pushing mechanism adopts a floating type that translates up and down. Under the action of the spring force of the upper end disc spring, the guide block of the to

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  • Hinge type driving retraction and push mechanism for externally hanging BH-VDT tool
  • Hinge type driving retraction and push mechanism for externally hanging BH-VDT tool
  • Hinge type driving retraction and push mechanism for externally hanging BH-VDT tool

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Embodiment Construction

[0031] First of all, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of examples, but all descriptions are only for illustration, and should not be construed as forming any limitation on the present invention . In addition, any single technical feature described or implied in each embodiment mentioned herein, or any single technical feature shown or implied in each drawing, can still be described in these technical features (or their equivalents) ) to continue any combination or deletion, so as to obtain more other embodiments of the present invention that may not be directly mentioned herein. In addition, for the sake of simplifying the drawings, the same or similar technical features may only be marked in one place in the same drawing.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "hor...

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Abstract

The invention relates to a hinge type driving retraction and push mechanism for externally hanging a BH-VDT tool. The hinge type driving retraction and push mechanism comprises a tool body, a hinge type guide block, a first fixing block, a second fixing block and an elastic tongue plate. The first fixing block is provided with an installing groove. The hinge type guide block and the first fixing block are connected in a rotating manner. A special-shaped groove is formed in one side of the second fixing block. One end of the elastic tongue plate is installed in the special-shaped groove. A special-shaped hole is formed in the other end of the bottom of the hinge type guide block. The portion, extending out of the special-shaped groove, of the elastic tongue plate is inserted into the special-shaped hole. The second fixing block is provided with at least one plunger. The plungers extend out to push the hinge type guide block to rotate relative to the first fixing block. When the plungersretract, the elastic tongue plate can drive the hinge type guide block to be restored to the normal position. The mechanism can greatly reduce the risk that tool trip meets resistance and jamming.

Description

technical field [0001] The invention belongs to the technical field of oil drilling equipment, and in particular relates to an external hinge type active retraction pushing mechanism for BH-VDT tools. Background technique [0002] The BH-VDT tool is a high-end drilling tool developed by Bohai Drilling Institute. It is a precision instrument integrating electromechanical and hydraulic systems. It has a good application prospect in the drilling process of complex formations with large geological dips, easy to deviate and difficult to stabilize. This product has formed 12 1 / 4 "~22" series products, initially the pushing mechanism adopts a floating type that translates up and down. Under the action of the spring force of the disc spring at the upper end, the guide block of the tool is stretched out in the free state, and the disc spring has a large force. Therefore, in Xinjiang Tarim Failed to pass 12 when region application 1 / 4 ", 13 1 / 8 "The upper thick-walled casi...

Claims

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Application Information

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IPC IPC(8): E21B47/001E21B47/01E21B49/00
CPCE21B47/01E21B49/00
Inventor 黄峰汝大军杨春陈世春黄健马哲魏庆振刘郅轩张雅静康建涛张长春檀大冰
Owner CNPC BOHAI DRILLING ENG
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