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Air-filling well-drilling sealing device

A sealing device and air-filled drilling technology, which is applied in directional drilling, sealing/isolation, earthwork drilling and production, etc., to achieve the effect of reasonable design, reliable operation, and uncontrollable wellbore trajectory

Inactive Publication Date: 2007-11-07
LIAOHE GASOLINEEUM EXPLORATION BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain problems in the application process. Because air needs to be filled, the conventional standpipe gas injection currently used in the field cannot meet the signal transmission of wireless measurement-while-drilling instruments in the process of wellbore trajectory control, which limits the use of air-filled drilling. Application in construction requiring directional drilling such as horizontal wells, sidetracking horizontal wells and branch wells

Method used

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  • Air-filling well-drilling sealing device

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Embodiment Construction

[0007] The present invention is provided by the following embodiments, which will be described below in conjunction with the accompanying drawings.

[0008] As shown in the figure, the present invention consists of a plastic plug 1, a plastic ball 2, a limit cover 3, a rubber plug iron ring 4, a lower fixing ring 5, a rubber cylinder 6, an upper pressure ring 7, a limit tooth 8, a spring 9, a lower Push ring 10, non-return ring 11, limit ring 12, upper push ring 13, piston 14, sealing ring 15, pressure transmission hole 16, inner tube 17, outer tube 18, upper joint 19, its structure and assembly relationship are as follows: Piston 14, upper push ring 13, limit ring 12, non-return ring 11, lower push ring 10, spring 9, upper pressure ring 7, rubber cylinder 6 and lower fixing ring 5 are set on the outside of inner tube 17 from top to bottom. The upper end is connected with the inner side of the outer pipe 18 with threads, the limit ring 12 is connected with the lower end of the...

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Abstract

The inflated drilling sealing device consists of a plastic plug, a plastic ball, a limiting cover, an iron ring, a lower fixing ring, a rubber barrel, an upper clamping ring, a spring, a lower driving ring, a non-return ring, a limiting ring, an upper driving ring, a piston, a sealing ring, an inner pipe, an outer pipe and an upper joint. The present invention has reliable operation, and can ensure the normal operation of inflated drill.

Description

Technical field: [0001] The invention relates to a downhole device for directional drilling engineering in oil and gas fields. Background technique: [0002] As oilfield development enters the middle and late stages, the formation pressure deficit in many major blocks is serious, and problems such as lost circulation, pipe sticking, and oil layer pollution have become one of the difficulties in drilling technology in the middle and late stages. As a branch of the low-pressure drilling technology series, air-filled drilling technology has been popularized because it can effectively prevent lost circulation, stuck pipe, simple construction technology and low operation cost. However, there are certain problems in the application process. Because air needs to be filled, the conventional standpipe gas injection currently used in the field cannot meet the signal transmission of wireless measurement-while-drilling instruments in the process of wellbore trajectory control, which lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/12E21B7/04
Inventor 陈思路李春吉骆骥何其东郑晓霞汪良波陈洪
Owner LIAOHE GASOLINEEUM EXPLORATION BUREAU