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Reverse circulation drilling tool

A drilling tool and reverse circulation technology, which is used in drilling equipment, driving devices for drilling in wellbore, earth-moving drilling, etc. , The effect of high mechanical efficiency and convenient directional drilling

Inactive Publication Date: 2014-08-13
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing coal mining technology is mainly based on the development of artificial underground roadways, the deepest can reach about 2000-2500m, but with the increase of underground temperature, the working environment is harsh, and the work efficiency is low; especially gas breakthrough, water seepage and rockburst accidents Occurs from time to time, seriously endangering the personal safety of underground workers and causing damage to mines and equipment

Method used

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  • Reverse circulation drilling tool

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Embodiment Construction

[0010] Such as figure 1 As shown, a reverse circulation drilling tool of the present invention is composed of an upper joint 1, a power assembly 5, a cardan shaft assembly 15, a transmission joint 16, a filter ring 17, a rubber sleeve 18, a diverter housing 19 and a transmission shaft assembly into 24 components; power assembly 5 includes stator housing 2, stator bushing 3, hollow screw 4; cardan shaft assembly 15 includes cardan shaft joint 6, disc spring 7, support seat 8, steel ball 9, reversing Head 10, locking ring 11, sealing sleeve 12, cardan shaft transmission rod 13, cardan shaft housing 14; transmission shaft assembly 24 includes sliding bearing sleeve 20, transmission shaft housing 21, bearing string 22, transmission shaft 23 Its structural features are: the upper end of the stator housing 2 of the power assembly 5 is connected with the upper joint 1 with a screw, the lower end is connected with the upper end of the cardan shaft housing 14 of the cardan shaft assemb...

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Abstract

The invention relates to a reverse circulation drilling tool used in well drilling and coal mining technology. The reverse circulation drilling tool solves the problems that when coal is mined in an artificial roadway, coal mining efficiency is low, safety of staff and equipment assets is difficult to guarantee, a drill jamming phenomenon is easily caused by annulus solid phase sedimentation and coal seam collapse and the like. The technical scheme includes that the upper end of a stator housing is connected with a top joint screw buckle, the lower end of the stator housing is connected with a screw buckle at the upper end of a universal shaft housing, the lower end of a hollow threaded rod is connected with a universal shaft joint screw buckle, a universal shaft joint at the other end of a universal shaft assembly is connected with a screw buckle at the upper end of a transmission joint, the lower end of the universal shaft housing is connected with a screw buckle at the upper end of a shunting housing, the upper end of a transmission shaft is connected with a screw buckle at the lower end of the transmission joint, the lower end of the transmission shaft is connected with a dedicated drill bit screw buckle, and the upper end of a housing of the transmission shaft is connected with a screw buckle at the lower end of the shunting housing. According to the reverse circulation drilling tool, part of drilling fluid enters into a power assembly drive hollow threaded rod from a through hole in the middle of the shunting housing so as to rotate, and drives a drill bit to break the coal, and the other part of the drilling fluid with coal particles enters into a drilling tool centre flow channel through the drill bit from a pit bottom.

Description

technical field [0001] The invention relates to a reverse circulation drilling tool used in drilling coal mining technology. Background technique [0002] There are abundant coal resources in the deep strata, and the development of coal carbon resources in deep strata must be an important direction for future energy development. The existing coal mining technology is mainly based on the development of artificial underground roadways, the deepest can reach about 2000-2500m, but with the increase of underground temperature, the working environment is harsh, and the work efficiency is low; especially gas breakthrough, water seepage and rockburst accidents Waiting to happen from time to time, seriously endangering the personal safety of underground workers, causing damage to mines and equipment. [0003] Coal drilling, as a new technology for the development of deep coal resources, will completely solve the main problems existing in the current artificial roadway mining. Drill...

Claims

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Application Information

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IPC IPC(8): E21B4/02E21B21/00
Inventor 梁政赵勇邓雄叶哲伟
Owner SOUTHWEST PETROLEUM UNIV
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