Novel cardan shaft screw drilling tool

Abstract

The invention relates to a novel cardan shaft screw drilling tool. The novel cardan shaft screw drilling tool comprises a stator, a rotor and a driving motor, the rotor is rotatably arranged in the stator, a rotating shaft of the driving motor is connected with one end of the rotor and can drive the rotor to rotate, a plurality of universal connectors which are sequentially connected in series arearranged between the rotating shaft of the driving motor and one end of the rotor, the universal connectors comprise male connectors, female connectors and core blocks, inserting columns are outwardsformed at the end parts of the male connectors, first counter bores are formed in the end parts of the female connectors, and inserting holes are formed in the centers of the bottom surfaces of the first counter bores. The novel cardan shaft screw drilling tool can adapt to various uneven drilling ground surfaces, so that the application range is expanded, great convenience is brought to use, more time and energy are saved, and the working efficiency is improved; and in addition, if a driving motor is far away from a drilling position, connection can be achieved only by increasing the numberof the universal connectors which are connected in series, and therefore use is further facilitated, and the application range is enlarged.

Description

technical field [0001] The invention relates to a novel cardan shaft screw drilling tool. Background technique [0002] When drilling oil wells, it is necessary to use special screw drilling tools to drill through multiple sets of formations from the ground along the designed trajectory to reach the predetermined target layer (oil and gas layers or possible oil and gas layers) until the required fluids (water, gas, etc.) are formed for oil and gas production or injection. , gas) stable channel (that is, oil and gas wells), and complete coring, logging, logging and testing during the drilling process and after drilling; the drive motors in the existing screw drilling tools are generally located on the ground, and The rotating shaft of the driving motor is set concentrically with the rotor, and in order to ensure that the verticality of drilling reaches the standard, the stator and the rotatable rotor set in the stator must be vertically extended into the ground, which require...

AI Technical Summary

Problems solved by technology

[0002] When drilling oil wells, it is necessary to use special screw drilling tools to drill through multiple sets of formations from the ground along the designed trajectory to reach the predetermined target layer (oil and gas layers or possible oil and gas layers) until the required fluids (water, gas, etc.) are formed for oil and gas production or injection. , gas) stable channel (that is, oil and gas wells), and complete coring, logging, logging and testing during the drilling process and after drilling; the drive motors in the existing screw drilling tools are generally located on the ground, and The rotating shaft of the driving motor is set concentrically with the rotor, and in order to ensure that the verticality of drilling reaches the standard, the stator and the rotatable rotor set in the stator must be vertically extended into the ground, which requires the driving motor at the same time The fixed angle must be accurate to ensure that the axis of rotation is also vertically downward. However, the ground surface at the drilling site is uneven. In order to ensure the accuracy of the fixed angle of the drive motor, it is usually necessary to pour a concrete platform for the drive motor to fix or build a special platform for the drive motor. The bracket used to fix the drive motor consumes a lot of time and effort, the work efficiency is low, the use is inconvenient, the scope of application is small, and it needs further improvement

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