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Underground electric drill device and method capable of reducing torque borne by drill stem

A technology of electric drilling tools and drill strings, which is applied in the direction of driving devices, transmission devices, and gear transmission devices for drilling in boreholes. It can solve problems such as difficult repairs and poor reliability, and achieve reduced material costs, reduced torque, Effect of reduced torsional strength requirements

Inactive Publication Date: 2014-04-09
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The existing electric drilling tools still have many deficiencies, such as poor reliability and difficult repair after the armature winding fails

Method used

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  • Underground electric drill device and method capable of reducing torque borne by drill stem
  • Underground electric drill device and method capable of reducing torque borne by drill stem
  • Underground electric drill device and method capable of reducing torque borne by drill stem

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] Such as figure 1 , figure 2 As shown, the bevel gear combination is mainly used for the transmission between two intersecting shafts, the left bevel gear 1 is the driving wheel, and the lower bevel gear 2 is the driven wheel. if in figure 1 A right bevel gear 3 is installed as the driving wheel on the right side of the structure, then it forms as image 3 Shown double drive wheel bevel gear combination structure.

[0040] Such as image 3 As shown, in the combined structure of double driving wheel bevel gears, the left bevel gear 1 and the right bevel gear 3 are the driving wheels, the lower bevel gear 2 is the driven wheel, and the rotation axes of the left bevel gear 1 and the right bevel gear 3 are horizontal direction, and the rotation directions of the left bevel gear 1 and the right bevel gear 3 are opposite. The direction of the axis of rotation ...

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Abstract

The invention provides an underground electric drill device and method capable of reducing the torque borne by a drill stem. The underground electric drill device is mounted between a drill collar and a drill bit and comprises two parts, namely a fixed power short circuit and a rotary rock breaking short circuit, wherein the upper end of the fixed power short circuit is connected with the drill collar; and two motors are symmetrically mounted on a metal cylindrical wall of the fixed power short circuit and are respectively connected with a conical gear. The lower end of the rotary rock breaking short circuit is connected with the drill bit; and gear teeth are arranged at the upper end of the rotary rock breaking short circuit. The lower end of the fixed power short circuit is connected with the upper end of the rotary rock breaking short circuit through a bearing and then two conical gears on the fixed power short circuit are simultaneously meshed with the gear teeth at the upper end of the rotary rock breaking short circuit; and the fixed power short circuit and the rotary rock breaking short circuit can relatively rotate on the axis extension line. According to the device and the method, the torque borne by the drill stem in the drilling process can be greatly reduced, the safety of drilling operation is enhanced, the service life of the drill stem is prolonged, and the exploration expenses of oil and gas fields are reduced; and the device and the method can be suitable for drilling deep wells and ultra-deep wells of oil and natural gas.

Description

technical field [0001] The invention relates to a design method and device of an electric downhole drilling tool which uses a double driving wheel bevel gear combination as a power transmission medium to reduce the torque on a drill string during oil and natural gas drilling. Background technique [0002] The deformation sign when the circular shaft is twisted is the relative rotation angle around the shaft between the two cross-sections, which is also the torsion angle. Calculated as follows: [0003] [0004] in: — the relative rotation angle formed between the two cross-sections of the circular axis; [0005] T—torque between two sections; [0006] l—the distance between two sections; [0007] I p — Polar moment of inertia of the section, and for a circular axis: D is the diameter of the shaft. [0008] It can be seen from formula (1) that when T, G, I p At a certain time, the relative rotation angle formed by the two cross-sections of the circular axis It ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/04F16H1/20
Inventor 王其军白翔孔祥伟陈乔吕栋梁钟烨杨娟彭刚陈鹏
Owner SOUTHWEST PETROLEUM UNIV
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