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What are the main characteristics of drill pipe?
Release time:
2019-05-26
Author:
Source:
Shandong yi mining drilling technology co., ltd. production of drilling engineering dedicated to all kinds of geological drill pipe, spiral drill pipe, triangular drill pipe, coal drill pipe, drill bit, drill pipe, complete specifications! Strength manufacturers, trustworthy! company set research and development-production-sales-sales as one, welcome customers to purchase, tel: 0635-2311078
A rod connected in a drilling tool to transmit power. The usual components of the drill string areDrill bit, drill collar, drill pipe, stabilizer, special joint and Kelly. The basic functions of the drill string are:(1) tripping the drill head;(2) applying WOB;(3) transmitting power;(4) transporting drilling fluid;(5) carrying out special operations: squeezing cement, handling downhole accidents, etc.
API standard E75 to S135 steel grades, series oil drill pipes with outer diameters from 2 3/8 "to 6 5/8", double shoulder joint drill pipes with high torsion resistance and special steel grades BNK C95S drill pipes for sulfur-containing oil wells. It is mainly suitable for the construction of deep wells, horizontal wells and large displacement wells in the process of oil and gas exploration and development.
Main features
The drill pipe is a steel pipe with a thread at the tail, which is used to connect the surface equipment of the drilling rig and the drilling equipment or bottom hole device at the bottom of the drilling. The purpose of the drill pipe is to carry drilling mud to the drill bit and raise, lower or rotate the bottom hole device together with the drill bit. The drill pipe must be able to withstand huge internal and external pressure, distortion, bending and vibration. In the process of oil and gas extraction and refining, drill pipe can be used many times.
The smooth pipe and the raw steel pipe are made into a drill pipe after a number of processing steps. First, through the treatment of the steel pipe thickening process, the outer surface of the smooth tube is bent inward, and the steel pipe wall is thickened. Next, thread processing is performed and plated with copper to increase strength. A non-destructive quality control inspection is then performed, followed by welding of the steel pipe body joint. Then, the tube body is subjected to a welding heat treatment and a welding final treatment to eliminate the welding residual pressure. Other tests, including hardness test, pressure test and non-destructive test, shall be carried out on the finished steel pipe before the finished drill pipe is painted and packaged.
Key words:
Drill pipe, welded, steel pipe, drill bit
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