A pulsating torque motor

Abstract

The invention provides a pulse torque increasing motor which comprises a shell, a capacity type power assembly, a transmission shaft, a vibration hammer, a transmission wheel set and an anvil. The capacity type power assembly, the transmission shaft, the vibration hammer, the transmission wheel set and the anvil are arranged in the shell; one end of the transmission shaft is connected to the capacity type power assembly by a coupling; the vibration hammer is slidably mounted on the transmission shaft; the transmission wheel set is arranged between the transmission shaft and the vibration hammer; the anvil is arranged at the other end of the transmission shaft. The pulse torque increasing motor has the advantages that rotary vibration effects can be realized by the aid of rotation energy ofthe transmission shaft, the pulse torque increasing motor can be mounted in drilling tool combinations according to site conditions, accordingly, technical requirements of various well drilling processes can be met, and rock breaking cutting force of drilling bits further can be increased; the pulse torque increasing motor is simple in structure, and influence on angle building characteristics ofthe pulse torque increasing motor which is a bent motor can be prevented; the pulse torque increasing motor is simple in structural design, reliable in performance and convenient to operate, and thelike.

Description

technical field [0001] The invention relates to the fields of petroleum and natural gas drilling, coal bed gas drilling, geological exploration, mine drilling and the like, in particular to a pulsating torque increasing motor. Background technique [0002] With the development of shallow oil and gas reservoirs exhausted, the number of deep wells and ultra-deep wells has increased year by year. However, with the increase of well depth, the rock formations are harder and harder to break, which seriously affects the increase of ROP. The reduction of ROP has become a constraint in our country. The technical bottleneck of efficient development of deep oil and gas reservoirs, and the existing conventional rock-breaking drilling technology cannot meet the technological requirements for speed-up and efficiency-enhancing. Foreign countries have a secret monopoly on advanced speed-up technology, which limits the development of domestic technology. [0003] At present, the "PDC+motor" ...

AI Technical Summary

Problems solved by technology

But the torque output by conventional motors is continuous and constant

Due to the heterogeneity of the formation, the rock breaking process of the drill bit is not in a stable state, which can easily lead to complex situations such as stick-slip sticking of the drill bit, which not only affects the drilling efficiency, but also causes great damage to the cutting teeth of the drill bit, reducing the drill bit. For this reason, relevant torsional impact tools have been developed at home and abroad, which can effectively improve the cutting energy of PDC drill bits, prevent the influence of stick-slip vibration, and protect the drill bit. It has a positive effect on increasing the drilling speed. Related torsional impact tools have also been proposed at home and abroad 工具的专利,可参见CN201520767504.6、CN201410514618.X、CN201310726252.8、CN201410306930.X、CN201310586179.9、CN201010511421.2、CN200910058083.9、CN201310698227.3、CN201420040141.1等

[0004] However, the existing torsion impact tools have complex structures, many parts, and large volume, and the torsion impact tools need to be effective under the condition of relatively high bit pressure. The quality of the wellbore will also generate axial vibration. If the drilling pressure is reduced, the effect of the torsion impact tool cannot be exerted

At present, there are no application reports on the use of torsion impact tools and motors at home and abroad. It can be seen that if the conventional torsion impact tools are simply connected to the motor, it will not only affect the speed-up effect of the "PDC+motor" process, but may also cause motor damage. Damage to the internal structure; and the existing torsional impact tools at home and abroad are relatively long in size, which will adversely affect the deflection characteristics of the bending motor, and cannot meet the requirements of precise control of complex structure well trajectory

Curved motor, that is, the motor with a curved casing commonly used in the drilling industry, that is, the casing of the motor has a certain curved angle. By using the curved angle and the sliding drilling process, the drilling construction of directional wells can be completed. The different bending angles, Bending motors have different build-up characteristics. Theoretically, the larger the bend angle, the higher the build-up rate. The existing bend motors only have the build-up characteristic, but not the function of speed-up. It is necessary to improve the drilling efficiency of the bend motor, that is, to improve The rate of penetration cannot change its deflection characteristics, and both must be considered. This is the main direction of research and development at home and abroad.

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