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Transmission shaft assembly device for Zhongcheng screw drilling tool

A transmission shaft and drilling tool technology, which is applied in the direction of the driving device, shaft, and drilling equipment for drilling in the wellbore, can solve the problems of reduced service life of the transmission shaft, low wear resistance, damage to the transmission shaft, etc., and prevent the fracture from falling into the well , reduce wear and eliminate stress concentration

Inactive Publication Date: 2015-09-23
TIANJIN DAGANG OILFIELD SHENGDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The transmission shaft of the traditional structure is welded together with the spline sleeve and the flange fork, and the spline shaft is welded on the rotating shaft tube. The surface of the teeth of the spline shaft is smooth, and its wear resistance is relatively low. The overall impact load is also harmful to the transmission shaft. Certain damage, resulting in a reduction in the service life of the drive shaft

Method used

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  • Transmission shaft assembly device for Zhongcheng screw drilling tool

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Embodiment Construction

[0011] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0012] Such as figure 1 It is a schematic diagram of the structure of the present invention, a transmission shaft assembly device used by Zhongcheng screw drilling tool, including a series bearing 1, a radial bearing 2, a rotating shaft 4, a housing 3 and an anti-drop half ring 5, and the rotating shaft 4 Set inside the housing 3, the series bearing 1 and the radial bearing 2 are set inside the rotating shaft 4; the series bearing 1 is a multi-row radial thrust ball bearing; the radial bearing 2 is a carbide sliding bearing Or rubber bearings, the radial bearings 2 are divided into upper and lower groups; the shoulder at the small end of the rotating shaft 4 adopts a larg...

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Abstract

The invention relates to a transmission shaft assembly device for a Zhongcheng screw drilling tool, and the device comprises a serial bearing, radial bearings, a transmission shaft, a housing, and an anti-fall semi-ring. The device is characterized in that that the transmission shaft is disposed in the housing in a sleeved manner; the serial bearing and the radial bearings are disposed in the transmission shaft in a sleeved manner; the serial bearing is a multi-column radial-thrust ball bearing; the radial bearings are hard-alloy sliding bearings or rubber bearings, and divided into an upper group and a lower group; and a shoulder part of a small end of the transmission shaft employs a big circular arc transition structure. A transmission shaft assembly enables the rotating power of a motor to be transmitted to a drill bit, and bears the axial and radial loads generated by bit pressure. The device is advantageous in improving the working environment of bearings, reducing the wear of all bearings, improving the reliability of fall resistance, and greatly prolonging the service life of the transmission shaft assembly.

Description

technical field [0001] The invention relates to the technical field of oil exploration and development well completion, in particular to a transmission shaft assembly device used by Zhongcheng screw drilling tools. Background technique [0002] Zhongcheng screw drilling tools are composed of bypass valve assembly, motor assembly, cardan shaft assembly and rotating shaft assembly. The function of the transmission shaft assembly is to transmit the rotational power of the motor to the drill bit, and at the same time bear the axial and radial loads generated by the drilling pressure. The transmission shaft of the traditional structure is welded together with the spline sleeve and the flange fork, and the spline shaft is welded on the rotating shaft tube. The surface of the teeth of the spline shaft is smooth, and its wear resistance is relatively low. The overall impact load is also harmful to the transmission shaft. Certain damage will cause the service life of the drive shaft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/00F16C3/02
Inventor 姜晶宇
Owner TIANJIN DAGANG OILFIELD SHENGDA TECH