Anti-Stage Tools to Avoid Sticking and Reduce Stick-Slip

Abstract

The invention discloses an anti-seizing tool capable of avoiding drill clamping and reducing sticky slipping to solve the problem that the rock breaking efficiency is low due to clamping and slipping in the drilling process. According to the main technical scheme, an upper connector, an upper shell, an adapter and a lower shell are sequentially connected through a thread; a compression spring is mounted on a compression spring guide rod, the low end of the compression spring guide rod pushes an anti-falling connector to enable a mandrel to stretch, and the anti-falling connector is connected with a mandrel thread and axially positioned through an adapter shaft shoulder; a steel wire rope system is arranged in a left-rotation mode, the upper and lower ends of the steel wire rope system are separately fixed to the lower end of the adapter and fixed into a circular groove in the upper end of a mandrel boss, the upper and lower ends of steel wire ropes are mounted by 30-40 degrees in an inclined mode, and the steel wire ropes are in a tensional state initially; during work, drilling pressure is transferred to the mandrel through the compression spring, and torque is transferred to the mandrel through the steel wire rope system; and when the mandrel rotates backwards, the steel wire rope system retracts to enable the mandrel to compress the compression spring to axially retract so as to decrease the cutting depth of a drill bit, and the drill bit is in a rock mass in the whole process.

Description

technical field [0001] The invention relates to an anti-sluggish tool for avoiding sticking and reducing stick-slip used in the fields of oil and natural gas ultra-deep wells and extended-displacement drilling. Background technique [0002] In recent years, with the continuous development of my country's industry, the demand and extraction of oil and natural gas are also increasing. However, this situation has led to the depletion of a large number of shallow oil and gas resources. In order to alleviate the shortage of oil resources in our country, people began to exploit oil in areas with severe environmental conditions such as deep wells and ultra-deep wells. However, according to the situation at the mining site, it is shown that in the process of drilling ultra-deep wells, extended-reach wells, and horizontal wells, the PDC bit is prone to slippage during the drilling process, especially when encountering soft and hard formations, causing the bit and the drill bit to sl...

AI Technical Summary

Problems solved by technology

However, according to the situation at the mining site, it is shown that in the process of drilling ultra-deep wells, extended-reach wells, and horizontal wells, the PDC bit is prone to slippage during the drilling process, especially when encountering soft and hard formations, causing the bit and the drill bit to slip. The frequent jumping and torsional vibration of the tool will lead to chipping and damage of the drill bit, and damage to the downhole drilling tool assembly, which will reduce the mechanical penetration rate of the bit and the rock breaking efficiency, and increase the drilling cost

In order to deal with this phenomenon, most of the current drilling sites use the method of drilling to solve the phenomenon of drill sticking and drilling, because the drilling efficiency will be greatly reduced with the increase of the number of tripping

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