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Screw drill

A screw drilling tool and screw technology, which is applied to drilling equipment, earthwork drilling, and driving devices for drilling in boreholes. long life effect

Inactive Publication Date: 2017-02-22
钟文楚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of this screw drilling tool are: the internal meshing gear is not wear-resistant in the mud environment containing solid particles, and the service life is short; when the shell is broken, it is easy to disengage between the inner and outer gears, and the screw drilling tool cannot pass through The connection of the shaft plays the role of preventing falling

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0019] Such as image 3 As shown, the screw drilling tool is composed of an anti-drop joint 1, an anti-drop rod 9, a motor assembly, a transmission shaft assembly and an intermediate connecting part. In order to improve the service life of the gears, the material of the internal gear 10 and the external gear 4 is designed to be solid carbide, but because the hardness of the cemented carbide is too high, it can only be processed by wire cutting. In order to facilitate the processing of gears by the wire cutting processing equipment, the internal gear 10 and the external gear 4 are designed as spur gears, so that the tooth shape can be completely processed by wire cutting. In order to prevent damage to other parts of the gear except the tooth shape during wire cutting, the gear is designed as follows: the outer contour of the outer gear 4 except the tooth shape is within the cylindrical surface of the dedendum, and the inner contour of the other parts of the inner gear 10 except...

Embodiment 2

[0023] Such as Figure 4 As shown, the screw drilling tool is composed of the anti-drop joint 1, the anti-drop rod 9, the motor assembly, the transmission shaft assembly and the intermediate connecting parts. The axes of the motor assembly and the transmission shaft assembly form a small angle, and the bending point at the internal gear. In order to improve the service life of the gears, the material of the internal gear 15 and the external gear 16 is designed to be solid carbide, but because the hardness of the cemented carbide is too high, it can only be processed by wire cutting. In order to facilitate the processing of gears by wire cutting equipment, the internal gear 15 and the external gear 16 are designed as straight bevel gears, so that the tooth profile can be processed by wire cutting. In order to prevent damage to other parts of the gear except the tooth shape during wire cutting, the gear is designed as follows: the outer contour of the outer gear 16 except the t...

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PUM

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Abstract

The invention provides an all-metal screw drill. Usually, an all-metal screw drill is composed of a multi-screw hydraulic motor assembly, a transmission shaft assembly and an inside engaged gear, the common inside engaged gear is prone to abrasion in a drilling fluid environment, and the gear is prone to being disengaged to cause fall-into-well accidents after a shell is fractured. An inside engaged gear of the screw drill is made from solid carbide and designed to be a straight gear and is capable of being machined through a linear cutting machining method; an anti-falling ring or an anti-falling disc is mounted on the gear to prevent gear disengagement; and the all-metal screw drill can effectively prevent the fall-into-well accidents caused by shell fracturing, and the service life of the inside engaged gear is long.

Description

technical field [0001] The invention relates to a screw drilling tool, especially a structural form of a screw drilling tool. Background technique [0002] A currently known metal screw drilling tool includes a motor assembly, a transmission shaft assembly and an intermediate coupling part. The motor assembly is a multi-screw hydraulic motor assembly. The multi-screw hydraulic motor assembly is composed of a plurality of screws and a housing. The plurality of screws are placed in parallel inner holes of the housing in sequence, and the adjacent screws have opposite directions of rotation. [0003] The multi-screw hydraulic motor assembly also includes a bearing and a bearing seat. The bearing includes a stationary ring and a moving ring. The bearing seat is fixed in the inner hole of the housing. The stationary ring of the bearing is fixed in the bearing seat. connect. [0004] The intermediate connecting part is an internal meshing gear assembly, the gear in the internal ...

Claims

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Application Information

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IPC IPC(8): E21B4/02
Inventor 钟文楚
Owner 钟文楚
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