High-speed large-torque full-hydraulic top drive well-drilling device

Abstract

The invention discloses a high-speed large-torque full-hydraulic top drive well-drilling device which is driven by a group of high-speed small-torque hydraulic motors. Each hydraulic motor is equipped with an independent multi-piece disk brake and a planetary speed reducer; a main shaft can rotate at high speed and large torque; a disk brake is not required to be arranged. The structure of the high-speed large-torque full-hydraulic top drive well-drilling device comprises a lifting device, a main transmission box, a rotation head assembly, a hydraulic chuck and an opening-closing sliding trolley which are arranged from top to bottom, wherein the upper part of the lifting device is directly connected with a traveling trolley by virtue of a lifting cross beam; the lower part of the lifting device is connected with a lifting seat of the main transmission box; the rotation head takes a rotation driver driven by a worm as a main working part; the accurate angle location is implemented by electric-hydraulic proportional closed-loop control; the rotation head has self-locking property and can be used for simultaneously driving a drilling column to rotate with the main shaft; the low-speed torque increasing operation can be implemented. The hydraulic top driver is small in size and light in weight; electric-hydraulic proportional volumetric speed control in a high rotation speed range is implemented by a hydraulic system through a mechanical and electrical integration technology, thereby meeting the requirements of a plurality of deep well drilling processes and drilling disciplines, especially core drilling during continental scientific drilling of deep wells.

Description

technical field [0001] A top drive drilling device, which uses a hydraulic source as power and has a high speed range and a large torque range, is an electromechanical-hydraulic integrated automatic drilling equipment that can be applied to the drilling of oil and gas wells, shale gas wells, and coalbed gas wells. Background technique [0002] In the 1980s, the top drive drilling device came out. The traditional turntable-driven drilling operation must use the active drill pipe, which cannot drive the drill string to rotate in time when tripping and disassembling the drill pipe, and cannot quickly realize the drilling fluid circulation. The length of the active drill pipe limits the drilling depth and degree of automation. A series of disadvantages such as low quality lead to low drilling efficiency and high probability of downhole accidents. [0003] The top drive drilling device can be used for vertical root drilling, which greatly shortens the auxiliary operation time of...

AI Technical Summary

Problems solved by technology

This type of hydraulic top drive transmission chain is simplified, the transmission efficiency is high, and the equipment is simple and reliable, but the hydraulic top drive motor is a special Heggron hollow low-speed high-torque radial plunger hydraulic motor, and the drive motor has poor versatility and high cost; and there are Disadvantages of top drive speed adjustment range and torque range are small, unable to adapt to various drilling process requirements

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