Shenzhen Shenzhen drilling wells drilling drillstring Shenzhen Shenzhen drilling drill string composed by kelly, drill sections and BHA three major components. Including drill pipe and drill pipe segment joints, sometimes equipped with reamer. BHA primarily drill collars, stabilizers may also be installed, shock absorbers, jars, reamers and other special tools. Specific components of the drill string with different purposes, different requirements, 1. is an essential part of the drill drill drill string? It is made of seamless steel pipe wall thickness is generally 9 ~ 11 mm? Its main role is torque transmission and conveying fluid, and by gradually lengthened so that the drill hole deepened? Therefore, drill occupies a very important position in the oil drilling. (1) drill structure and specifications. Drill by drill pipe tool joint body with two parts. Connecting the drill pipe and fitting in two ways: one is connected with the filaments buckle, both ends of the tube that has a fine public car buckle with thin buckle female connector at one end connected to said this drill for There are fine buckle drill (see Figure 2-29b. The other is the tube and fittings welded together by friction welding, butt welding, said this drill is the drill pipe, drill pipe with fine buckle has been basically eliminating Xun, China is now the production or import of all welded drill drill (no fine buckle drill)? In order to enhance the strength of the connection pipe and fittings, pipe ends of the body thickened. Commonly used in the form of thick thick, outer thick, inside and outside the thick three kinds http://www.syzjgc.com/ Drilling Engineering Co., Ltd. Shenzhen-source