(1) Pseudo-strain energy mutations mainly occur when the drill bit enters the soft soil layer and when the roller cone bit passes through the abrupt formation interface. The higher the forming hardness, the greater the pseudo strain energy when the spiral seam submerged arc welded steel pipe enters

Definition of welded pipe:Welded pipe, also known as welded steel pipe​, is a steel product made by bending a steel plate into a tubular shape, welding it, and undergoing some form of surface treatment. Welded pipes have the characteristics of high strength, corrosion resistance, and long life, and are widely used in construction, automobiles, furniture and other fields. The following will introduce the commonly used materials of welded pipes.

1. Broken pipe: According to the site surveying and mapping sketch, draw a line on the selected pipe and break the pipe according to the line. a. Saw the pipe with a grinding wheel, put the pipe on the caliper of the grinding wheel saw, align the drawn line and clamp it firmly to break the pipe. Whe

Surface treatment methods of seamless tubes & pipes:

After the oil casing adopts this heat treatment method, it can effectively improve the impact toughness, tensile strength, and anti-destructive performance of the oil casing, ensuring good value in use. Petroleum casing is a necessary pipe material for drilling oil and natural gas, and it needs to h

Different working environments require different surface treatment methods for seamless pipes to ensure the performance and service life of the steel pipe. 1. Indoor use: Seamless steel pipes for indoor use can choose surface treatment methods such as spray painting, coating or electroplating. 2

1. If the buyer has special requirements for the packaging material and packaging method of the spiral steel pipe, it should be indicated in the contract; if not specified, the packaging material and packaging method can be selected by the supplier. 2. Packaging materials should comply with relevant

Basic introduction to carbon steel round tubes and square tubes: