Torsion impactor and method for drilling
An impactor and torsion technology, applied in drilling equipment and methods, drilling equipment, percussion drilling, etc., can solve the problems of ineffective cutting of formations, low drilling efficiency, short service life, etc., and achieve simple structure and long service life. The effect of prolonging and reducing the cost of use
Active Publication Date: 2021-07-23
中石化石油工程技术服务有限公司 +2
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Problems solved by technology
This phenomenon is that the formation cannot be effectively cut, and the second is that drill string undercut accidents are prone to occur.
At present, the torsional impact tools developed to solve the above problems have different methods of realizing torsional impact. From the perspective of driving methods, they can be divided into indirect drilling fluid drive type and drilling fluid direct drive type. The current products, there are There are many problems, the drilling efficiency of deep wells and hard formations is low, and the service life is short
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[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.
[0020] combine figure 1 , a drilling torsion impactor mentioned in the present invention includes a short joint, the short joint includes an upper joint 11 and an outer cylinder 1, the upper end of the upper joint 11 is a drill pipe female buckle, the lower end of the outer cylinder 1 is a drill bit female buckle, and the upper joint 11 and the outer cylinder 1 are connected by screws, and the inner part of the short joint includes an upper disc 8, a lower disc 5, a fixed valve block 3, an impact block 7, an inlet disk 4, an impact block 7, and a bearing plate at the bottom of the impact block. 10. The filter screen 12, a filter screen 12 is provided on the inner and lower part ...
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The invention relates to a torsion impactor for well drilling and a method thereof. Its technical solution is: a filter screen is provided on the inner lower part of the upper joint, and an upper disk is provided at the connection between the upper joint and the outer cylinder. The upper disk is provided with two valve holes A, and a center is provided on the inner side of the outer cylinder. There is an impact block on the outer side of the center hole, a bottom bearing piece on the bottom of the impact block, a fixed valve block on the outside of the impact block, and a lower plate on the lower part of the bearing plate at the bottom of the impact block. The upper part of the fixed valve block is provided with an inlet disk, and the two sides of the inlet disk are symmetrically arranged. There are two liquid guide holes on both sides, the first liquid guide hole B and the second liquid guide hole C, and the lower plate is There are four oval pressure relief holes. The beneficial effects of the present invention are: the present invention adopts the method of directly impacting the tool body to realize the high-frequency torsion impact on the drill bit. Since the impact hammer directly acts on the drill body, the structure is simpler, the use is more reliable, and the service life is greatly extended. .
Description
technical field [0001] The invention relates to a drilling tool, in particular to a torsion impactor and a method for drilling. Background technique [0002] The drilling of deep wells in hard formations, ultra-hard formations and highly abrasive formations is still a worldwide and universal problem until now. Drilling in this kind of formation has slow ROP, serious skipping drilling, difficulty in preventing and correcting deviation in vertical wells, many drilling tool accidents, serious wear of drill bits and centralizers, and well caliber problems. The stratum is hard, abrasive, lithological changes are large, and drillability is poor. Sometimes only 1 to 2 meters are drilled a day, and the drilling efficiency is very low. The stratum is inhomogeneous, there are many interlayers, the soft and hard are interlaced, the junk drilling is serious, and the drilling tool accidents occur frequently, resulting in poor drilling effect and short service life of many types of drill...
Claims
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IPC IPC(8): E21B1/26E21B10/36
CPCE21B1/00E21B10/36
Inventor 秦利民李华东冉新兰宁龙施进李兆东王平蒲文学
Owner 中石化石油工程技术服务有限公司