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Introduction of R780 Geological Pipe Geological Drill Pipe
Release time:
2018-08-10
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The geological drilling tool designed and produced by friction welding process of geological alloy steel pipe adopts geological special alloy steel pipe (R780, DZ50), and the geological drill bit adopts high-quality alloy structural steel (42CrMo) through vacuum conditioning treatment, which greatly improves the fatigue strength and shear strength. The production process of geological drill pipe adopts advanced friction welding technology. The drill pipe has the characteristics of high bending strength and firm welding, which can ensure the requirements for straightness when drilling deep holes, and has high fatigue strength and long service life. R780 Geological Pipe-Specifications, Models, Specifications and Models Complete Geology
Geological drilling tools designed and produced by friction welding process of geological alloy steel pipe
The geological pipe rod body is made of special alloy steel pipe (R780, DZ50), and the geological drill pipe bit is made of high-quality alloy structural steel (42CrMo) through vacuum conditioning treatment, which greatly improves the fatigue strength and shear strength.
geological drill pipeProduction process
Using advanced friction welding welding process production and processing, the drill pipe has the characteristics of high bending strength and firm welding, which can ensure the straightness requirements during deep hole drilling, and has high fatigue strength and long service life.
R780 Geological Pipe-Specifications
Complete specifications and models
geological drill pipeCommon Specifications
Φ50*1m 、 Φ63.5*1m
geological drill pipeConnection mode
male and female connection (taper thread), joint connection (rectangular internal thread)
R780 Geological pipe-Geological pipe material
D40(50 Mn ) DZ50（45Mn2）、R780（36Mn2V）、R780（42MnMo7）,DZ60(45MnMoB)。
R780 Geological Pipe-Purpose
Drill pipe:
The rod in the drilling tool that connects the drill bit to transmit power. The usual components of the drill string are: drill bit, drill collar, drill pipe, stabilizer, special joint and kelly. The basic functions of the drill pipe are:(1) tripping the drill head;(2) applying weight on bit;(3) transmitting power;(4) transporting drilling fluid;(5) carrying out special operations: squeezing cement, handling downhole accidents, etc.
钻铤(drill collar)：
It is located in the lowest part of the drill string and is the main component of the BHA. Its main features are large wall thickness (generally 38~53mm, equivalent to 4~6 times of the drill pipe wall thickness), with large gravity and rigidity, it mainly plays the following roles in the drilling process:
(1) Apply weight on bit;
(2) to ensure the necessary strength under compression conditions;
(3) Reduce the vibration, swing, and beating of the drill bit, so that the drill bit works smoothly;
(4) Control well deviation.
Drill collars come in many different shapes, such as round, square, triangular and spiral. The most commonly used are round (smooth) drill collars and spiral drill collars.
套管(casing pipe)：
A tube over another part
The section is annular, used to protect other equipment of various materials, mostly iron, steel.
The casing is a large diameter pipe that is put into the open hole and needs to be fixed with cement. The well designer must design the sleeve to withstand various external forces, such as collisions, bursts, tensile forces, etc., as well as chemical erosion.
Casing is fixed into the borehole during drilling, which can stabilize the borehole. Casing as an important part of the wellbore has the following important role:
1. Prevent borehole wall collapse, isolate different formations to prevent fluid convection between formations, and then control formation fluid and pressure during drilling.
Casing can also assist surface well control equipment and downhole production equipment to achieve their respective functions.
3. Casing is suitable for different well diameters and different material grades.
Tube well sedimentation pipe (grit compartment):
The pipe section located at the lowest part of the pipe well to accommodate sand particles entering the well and precipitates precipitated from the water.
In the practical application of geological pipe and geological drilling pipe:
In order to find out the underground rock structure, underground water, oil, natural gas and mineral resources, drilling rig is used to drill wells. Oil and natural gas extraction is inseparable from drilling. Seamless steel pipes for oil drilling for geological drilling are the main equipment for drilling, mainly including core outer tube, core inner tube, casing, drill pipe, etc. Because the drilling pipe has to go deep into the formation depth of several thousand meters, the working conditions are extremely complex, and the drill pipe is subjected to stress such as tension, compression, bending, torsion and unbalanced impact load, as well as mud and rock wear. Therefore, the pipe must have sufficient strength, hardness, wear resistance and impact toughness, steel for steel pipes is expressed by "DZ" (geological Chinese phonetic prefix) plus a number to represent the yield point of steel. Commonly used steel numbers are 45MnB and 50Mn of DZ45; 40Mn2 and 40Mn2Si of DZ50; 40Mn2Mo and 40MnVB of DZ55; 40MnMoB of DZ60 and 27MnMoVB of DZ65. Steel pipes are delivered in a heat-treated state.
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