Remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling

Patent metadata

Field	Value
Publication number	US-9850716-B2
Application number	US-201615144821-A
Country	US
Kind code	B2
Filing date	May 3, 2016
Priority date	Dec 31, 2015
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling is provided, including a piston speed control system, a motor assembly, a cardan shaft assembly and a transmission shaft assembly which are connected with each other from up to down in sequence. The motor assembly includes air inlets, a cam, air cylinders, pistons, a connecting rod, air outlets, liquid inlets, hydraulic cylinders, liquid check valves, a liquid storage chamber, liquid outlets, a liquid injecting chamber, a liquid injecting hole, an anti-drop cap, a rotor, a stator, and a motor assembly housing. The present invention utilizes the high-pressure gas injected by the gas drilling to drive the pistons to move back and forth at high-speed, so as to drive the incompressible liquid within the driving screw to achieve the self-circulating motion, and the screw rotor is driven to rotate by the liquid.

First claim

What is claimed is:

1. A remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling, comprising a piston speed control system, a motor assembly, a cardan shaft assembly and a transmission shaft assembly which are connected with each other from top to bottom in sequence; wherein:
the piston speed control system comprises a piston speed control housing, a polymer battery pack, a remotely-controlled circuit box, a piston speed control motor and a piston speed control shaft, wherein the polymer battery pack is located at an upper portion of the piston speed control housing, both the remotely-controlled circuit box and the piston speed control motor are located at the piston speed control housing and below the polymer battery pack, the piston speed control shaft is connected with a lower portion of the piston speed control motor and extends downwardly;
the motor assembly comprises an air inlet A, an air inlet B, a cam, an air cylinder A, an air cylinder B, a piston A, a piston B, a connecting rod, an air outlet A, an air outlet B, a liquid inlet A, a liquid inlet B, a hydraulic cylinder A, a hydraulic cylinder B, a liquid check valve A, a liquid check valve B, a liquid storage chamber, a liquid outlet A, a liquid outlet B, a liquid injecting chamber, a liquid injecting hole, an anti-drop cap, a rotor, a stator, and a motor assembly housing, wherein two bilaterally symmetrical empty cavities are provided within and at an upper portion of the motor assembly housing, the piston A and the piston B are respectively located within the two empty cavities, the piston A divides one empty cavity into an upper air cylinder A and a lower hydraulic cylinder A; similarly, the piston B divides another empty cavity into an upper air cylinder B and a lower hydraulic cylinder B, the upper air cylinder A is corresponding to the upper air cylinder B, the lower hydraulic cylinder A is corresponding to the lower hydraulic cylinder B, the connecting rod is located between the piston A and the piston B, both the air inlet A and the air inlet B are respectively provided above the air cylinder A and the air cylinder B, both the air outlet A and the air outlet B are respectively provided at a top of the air cylinder A and the air cylinder B, the cam, which is located between the air inlet and the air cylinder and coaxially connected with the piston speed control shaft, rotates to control an ON/OFF of the air inlet A, the air inlet B, the air outlet A and the air outlet B, the liquid inlet A and the liquid inlet B are respectively provided on a wall of the hydraulic cylinder A and the hydraulic cylinder B and are communicated with the liquid injecting chamber, a bottom of the hydraulic cylinder A and a bottom of the hydraulic cylinder B are respectively communicated with the liquid storage chamber through the liquid check valve A and the liquid check valve B, the stator, which is located at a lower portion of the motor assembly, is a pipe with helical inner holes, the rotor is located within the stator, and spirally upwardly extends to the liquid storage chamber and connects with the anti-drop cap, the anti-drop cap is threadedly connected with the rotor, an external wall of the rotor, having a helical shape, matches the inner holes of the stator, the stator is conjugatedly engaged with the rotor.

2. The remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling, as recited in claim 1 , wherein the piston speed control system further comprises a battery gasket which is located between the polymer battery pack and the piston speed control housing.

3. The remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling, as recited in claim 1 , wherein the piston speed control system further comprises a piston speed control cover which is located above the piston speed control housing.

4. The remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling, as recited in claim 2 , wherein the piston speed control system further comprises a piston speed control cover which is located above the piston speed control housing.

5. The remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling, as recited in claim 1 , wherein the cardan shaft assembly comprises a cardan shaft assembly housing, a cardan shaft located within the cardan shaft assembly housing, and a rotor-cardan shaft joint, wherein the cardan shaft is connected with a bottom of the rotor of the motor assembly through the rotor-cardan shaft joint, for transforming an eccentric motion of the rotor into a rotation around a fixed axis of the transmission shaft, and simultaneously, transmitting a torque to the transmission shaft.

6. The remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling, as recited in claim 1 , wherein the transmission shaft assembly comprises a transmission shaft, a radial bearing, and a transmission shaft assembly housing, wherein the transmission shaft is located within the transmission shaft assembly housing, and the radial bearing is located between the transmission shaft assembly housing and the transmission shaft.

7. The remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling, as recited in claim 6 , wherein the transmission shaft assembly further comprises an upper radial bearing moving coil, and an upper radial bearing static coil, wherein both the upper radial bearing moving coil and the upper radial bearing static coil are located within a lubrication chamber which is between the transmission shaft assembly housing and the transmission shaft on the radial bearing for lubrication of lubricating oil.

8. The remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling, as recited in claim 6 , wherein the transmission shaft assembly further comprises a lower radial bearing moving coil, and a lower radial bearing static coil, wherein both the lower radial bearing moving coil and the lower radial bearing static coil are located within a lubrication chamber which is between the transmission shaft assembly housing and the transmission shaft below the radial bearing for lubrication of lubricating oil.

9. The remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling, as recited in claim 6 , wherein the transmission shaft assembly further comprises an upper radial bearing moving coil, an upper radial bearing static coil, a lower radial bearing moving coil and a lower radial bearing static coil, wherein both the upper radial bearing moving coil and the upper radial bearing static coil are located within a first lubrication chamber which is between the transmission shaft assembly housing and the transmission shaft on the radial bearing for lubrication of lubricating oil; both the lower radial bearing moving coil and the lower radial bearing static coil are located within a second lubrication chamber which is between the transmission shaft assembly housing and the transmission shaft below the radial bearing for lubrication of lubricating oil.

Assignees

• Univ Southwest Petroleum

Inventors

• Lin Tiejun
• Zhang Ying
• Lian Zhanghua
• Zhang Qiang
• He Yong
• Li Gao
• Shi Taihe
• Yu Hao

Classifications

• E21B21/16

  using gaseous fluids (E21B21/14 takes precedence) · CPC title

• E21B10/44 Primary

  Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts (E21B10/42 takes precedence) · CPC title

• E21B7/046

  horizontal drilling (drilling with mechanical conveying means E21B7/003) · CPC title

• E21B44/005

  Below-ground automatic control systems · CPC title