CN2192713Y

CN2192713Y - High-power screw arbor drilling tool

Info

Publication number: CN2192713Y
Application number: CN 94240211
Authority: CN
Inventors: 王清; 单既明; 赵洪才; 王家友
Original assignee: JIAOLONG MACHINERY PLANT WEIFANG
Current assignee: JIAOLONG MACHINERY PLANT WEIFANG
Priority date: 1994-04-20
Filing date: 1994-04-20
Publication date: 1995-03-22
Anticipated expiration: 2004-04-20

Abstract

The utility model relates to a dynamic drill for digging directional wells to revive old wells in the oil development operation. The drill is composed of a by-pass valve assembly 1, a motor assembly 2, a universal shaft assembly 3 and a transmission shaft assembly 4. The utility model has the essential technical proposal that a spiral stator 5 in the motor assembly 2 is a spiral hole of which the cross section has seven heads, a spiral rotor 6 is a spiral shaft of which the cross section has six heads, an engaging curve of the spiral stator 6 is a hypocycloid with equal distance, and the universal shaft 7 uses a petal type internal sealing structure. The screw drill has the advantages of large torque, rapid well drilling and wide application, and is particularly suitable for the redevelopment of the old wells.

Description

High-power screw arbor drilling tool

The utility model relates to the power drilling tool that brings back to life the usefulness that digs a directional well in a kind of oil development operation for old well.

Along with the development of petroleum industry and the old well of progress of science and technology bring back to life the generally attention that has obtained the home and abroad, the well workover drilling tool that matches with it is the new problem of a primary study in the current oil development.Said old well brings back to life, and is that orientation, sidetracking are carried out in certain position in old well, turns round the underground work such as window of orientation and horizontal well.Carry out downhole orientation, sidetracking, turn round the orientation and the horizontal well of the fetching water used power tool of operation such as window is generally helicoid hydraulic motor.At present, produce the more powerful helicoid hydraulic motor that uses both at home and abroad, the section head number of its helical rotor is general to adopt 5 or 7, and the section head number of helical stator adopts 6 or 8.Because helical stator is that rubber is made, be heated its section symmetry projection of back in the down-hole simultaneously to center swell, so just dwindled the centre bore of helical stator, reduce the gap between sub-helical rotor and helical stator, increase the internal drag of helical rotor, reduced the helical rotor output torque.Because the helical curve of helical rotor and helical stator is unreasonable, also be a bigger reason of helicoid hydraulic motor internal resistance of producing at present.Moreover because the section head number of helical rotor is asymmetric, its machining is measured also relatively difficulty, and crudy be cannot say for sure to demonstrate,prove.

The purpose of this utility model is in order to overcome above-mentioned shortcoming, and a kind of internal drag that provides is little, and power output, moment of torsion are big, and is convenient to the high-power helicoid hydraulic motor of in-process measurement.

The utility model is to realize like this, it comprises bypass valve assembly, motor sub-assembly, universal drive shaft assembly and the transmission shaft component that is fixedly connected sequentially, its technical essential is: the helical stator in the motor sub-assembly is seven threaded hole, and the helical rotor that is installed in this threaded hole is six helical axis.The pitch curve of helical stator and helical rotor adopts equidistant hypocycloid line style.

Because helical stator of the present utility model adopts seven threaded hole, the protrusion position and the concave part of its section are symmetrical, helicoid hydraulic motor is at down-hole high temperature place like this, the minimizing of protruding the stator threaded hole that the position expanded by heating causes be helical stator section head number be half of six or eight threaded hole, it is effectively in the fit clearance that guarantees helical rotor and helical stator, to reduce the resistance of helical rotor to helical stator, improve the output torque of helical rotor effectively, improve the power output of spiral drill.Because helical rotor is six helical axis, it is convenient to machining and measurement, its machining accuracy of favourable assurance, and this also is the key factor that improves the helical rotor output torque.Moreover because the pitch curve of helical rotor and helical stator adopts the hypocycloid line style, it can reduce the engagement resistance between helical rotor and the helical stator widely, helps improving the power output of helical rotor.

Fig. 1 is a structure principle chart of the present utility model;

Fig. 2 is the structure principle chart of bypass valve assembly;

Fig. 3 is the structure principle chart of motor sub-assembly;

Fig. 4 is the A-A sectional drawing of Fig. 3;

Fig. 5 is the structure principle chart of universal drive shaft assembly;

Fig. 6 is the structure principle chart of transmission shaft component.

Below in conjunction with accompanying drawing the utility model is described in detail.The utility model is fixedly connected sequentially and is constituted by bypass valve assembly 1, motor sub-assembly 2, universal drive shaft assembly 3, transmission shaft component 4.Bypass valve assembly 1 by the cylinder valve shell, be installed in the fixedly valve pocket in the valve shell, sliding valve core and back-moving spring constitute.Motor sub-assembly 2 is formed by being fixedly mounted on helical stator 5 in the motor case and the helical rotor 6 that is installed in the helical stator.The section of helical stator 5 is threaded hole of seven, and helical rotor 6 is six helical axis for section.The pitch curve of helical stator 5 and helical rotor 6 is equidistant hypocycloid line style.The lower end of helical rotor 6 is connected with universal drive shaft 7.Universal drive shaft 7 is installed in the universal drive shaft shell, connects power transmission shaft 8 in the lower end of universal drive shaft 7, and power transmission shaft 8 is installed in the shell of transmission shaft component 4 through bearing.Universal drive shaft 7 preferably adopts petal type internal sealed structure.So that helical rotor 6 passes through universal drive shaft 7 to power transmission shaft 8 carry-over moments, reduce the internal drag of motor, help increasing the power of helicoid hydraulic motor.

Claims

1, high-power helicoid hydraulic motor, be fixedly connected sequentially by bypass valve assembly (1), motor sub-assembly (2), universal drive shaft assembly (3) and transmission shaft component (4) and form, it is characterized in that the helical stator of fixing in the shell of motor sub-assembly (2) (5) is seven threaded hole for section, the helical rotor of installing in this threaded hole (6) is six a helical axis for section, and the pitch curve of helical stator (5) and helical rotor (6) is equidistant hypocycloid line style; Universal drive shaft (7) in the universal drive shaft assembly (3) is the petal type inner seal structure.