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Specification and steel grade strength of drill pipe

Specification and steel grade strength of drill pipe

According to the regulations of the American Petroleum Institute (American Petroleum Institute)(API), drill pipes are divided into three categories according to length (L): the first category: 5.486-6.706m(18-22ft); The second category (commonly used):8.230-9.144m(27-30ft); The third category: 11.582-13.716m(38-45ft). Drill pipe can also be classified by outside diameter size. The sizes (d) of commonly used drill pipes are 88.9,114.3 and 127mm (customarily expressed in imperial sizes: 3 1/2 "4" 5 ").

2023/08/25

Introduction of joints of drill pipe

Introduction of joints of drill pipe

The drill pipe joint is an integral part of the drill pipe, which is divided into male and female joints and is connected to both ends of the drill pipe body. In order to enhance the connection strength of the joint, the wall thickness of the pipe body needs to be increased at the joint site. According to the thickening method, it can be divided into three forms: inner thickening, outer thickening, and inner and outer thickening. The thread on the joint is threaded (thick buckle), which is used to connect each single drill pipe. The thread of the drill pipe joint is a taper pipe thread with a sealing shoulder. The shoulder surface is tightened to play a sealing role, and the thread only plays a connecting role. Thickening way is different, the corresponding joint thread buckle type is also different.

2023/08/25

Classification of drill pipe

Classification of drill pipe

Drill pipes are divided into three categories: kelly pipe, drill pipe and weighted drill pipe. The connection sequence is kelly (1) drill pipe (n, determined by the depth of the well) heavy drill pipe (n, determined by the design of the BHA).

2023/08/25

Main features of drill pipe

Main features of drill pipe

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 steel pipe 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.

2023/08/25

What is drill pipe

What is drill pipe

A 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 and grinding 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 to 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.

2023/08/25

What should be paid attention to for daily maintenance of weighted drill pipes?

What should be paid attention to for daily maintenance of weighted drill pipes?

1, the cleaning part adopts a closed protective structure, the environment is clean, to ensure safety. 2. The external cleaning of sucker rod adopts inclined roller to rotate forward, frequency conversion speed regulation, rotation and propulsion speed can be adjusted. 3, the use of PLC detection and control system, manual and automatic two control methods (can be designed according to user requirements). 4. The external cleaning of the weighted drill pipe adopts intermediate frequency induction heating to the outer surface of the pipe, which is cleaned by a rotating steel brush, rinsed with clear water at the same time, and then derusted through a derusting box. The heating temperature of the pipe surface is controllable and adjustable, and is not affected by the seasonal temperature. The cleaning and derusting effect is completed at the same time.

2023/08/25

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