A positive and negative screw thread grading and drilling process method for wireline core drill pipe

A process method and core drilling technology, applied to drill pipes, undisturbed core extraction devices, drill pipes, etc., can solve the problems of increased worker workload, economic damage, and increased pipe consumption

Active Publication Date: 2020-08-14
贵州远东兄弟钻探有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When a serious accident occurs in the hole, it is necessary to return the drill tool for the accident in the hole to the outside of the hole, and it is necessary to equip a large number of anti-thread drill pipes for this method, which not only increases the size of the pipe consumption, but also increases the workload of workers, causing additional economic damage

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0012] The implementation steps of this method are as follows:

[0013] 1. Drilling construction configuration series drill pipes, drilling tools, and drill pipe steel pipes meet the quality requirements of the national standard GB / T9808-2008 "Seamless Steel Pipes for Drilling";

[0014] 2. The buckle type of the drill pipe series is in accordance with the positive, negative, positive and reverse car buckles, and vice versa;

[0015] 3. When the drilling process of the upper level drill pipe encounters complex formations, resulting in the collapse of the hole, severe block loss, and normal drilling, the upper level drill pipe can be lowered into the hole as a casing to protect the upper hole wall, replace the next level of drill pipe with the opposite screw thread to drill;

[0016] 4. When there is a forced inclination in the formation, when the normal wire (reverse wire) is drilled, the deviation in the hole is serious, and the diameter can be changed, and the reverse threa...

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PUM

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Abstract

The invention discloses a positive and negative screw thread grading and drilling technology method of a cable coring drill pipe. The method comprises the steps that a needed drilling tool drill pipeis determined by affirming a drill hole structure of cable coring drilling, when a first-level drilling tool drill pipe is a positive screw thread, then a second-level drilling tool drill pipe is a negative screw thread, a third-level drilling tool drill pipe is a positive screw thread, the rest drilling tool drill pipes can be judged by the rule alternately and sequentially and vice versa, and aprevious-level drill pipe can serve as a casing pipe of a next-level bore diameter, and can also serve as a negative thread drilling tool. The technology method has the advantages that accidents can be effectively prevented, the using amount of pipes is reduced, transporting workload is reduced, declining of the drill hole can be effectively restrained at the same time, in-hole accidents can be effectively and timely handled, and the drilling cost is lowered, and is safe in cable coring and economical in drilling, and effectively ensures the drilling quality.

Description

technical field [0001] The invention relates to a forward and reverse screw thread grading and drilling process method of a wireline coring drill rod, in particular to a process method for wireline coring safe, economical drilling and drilling quality assurance. Background technique [0002] Drilling engineering is an indispensable means in the exploration of mineral resources. In the process of sampling and drilling rock cores, complex strata such as forced deflection, broken, collapsed, water-sensitive strata, and karst caves are often encountered, and the drilling speed is slow. In severe cases, it is impossible to drill normally, so it is necessary to change the diameter for the next level of drilling; and for the formation with strong deviation, light pressure, slow drilling or other deviation correction tools are used to correct the deviation, often a few meters or a few meters after the deviation is corrected. Ten meters, the inclination of the hole returns to the ori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/00E21B17/04E21B7/10
CPCE21B7/10E21B17/04E21B25/00
Inventor 何远东何远洪何高高波
Owner 贵州远东兄弟钻探有限公司
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