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Precautions for the use of spiral drill pipe
Release time:
2019-05-27
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Precautions for the use of spiral drill pipe The spiral 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 geological auger drill pipe is to transport drilling mud to the drill bit and raise, lower or rotate the bottom hole device together with the drill bit. Geological spiral drill pipe must be able to withstand huge internal and external pressure, distortion, bending and vibration. Precautions for the Use of Geological Spiral Drill Pipe 1. When using it for the first time, it is necessary to "grind the new buckle" first. This includes the technological innovation of screw thread oil first, then use the drilling rig to tighten it with full strength, and then apply the screw thread when opening the buckle for domestic demand.
Precautions for the use of spiral drill pipe
auger drill pipeIt 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 geological auger drill pipe is to transport drilling mud to the drill bit and raise, lower or rotate the bottom hole device together with the drill bit. Geological spiral drill pipe must be able to withstand huge internal and external pressure, distortion, bending and vibration.
Precautions for the use of geological spiral drill pipe
1When using the first drilling, you should first“Grind new buckle”, this includes, first apply the screw thread oil technology innovation, then use the drilling rig to tighten, open the buckle domestic demand, apply the screw thread oil and then open it, so repeated three times, can avoid new wear and buckle.
21. Keep the geological spiral drill pipe in a straight line between the ground and the ground as much as possible, so as to avoid the side force of the threaded part and cause unnecessary wear and extreme depression, or even jump buckle the geological spiral drill pipe. It is very important to anchor the drilling rig to avoid the force movement during construction.
32. When using the new geological spiral drill pipe, it should be determined that the screw thread of the front section of the drill bit (protecting the shaft head) is also close to the new one. The turning head with a bad button can easily damage the screw thread of the new geological spiral drill pipe, resulting in water leakage, buckle, looseness, etc.
Geological spiral drill pipe corrosion wear form
Corrosion wear is a phenomenon of material loss caused by the chemical or electrochemical reaction between the surface material and the surrounding medium during the relative sliding process of the friction pair surface. When the drilling fluidCO2 andH2SWhen the content is high, it will
drilling fluidpH decreases,H ion directly with the iron rod columnFeExchange of electrons, thereby dissolving the geological spiral drill pipe; during the drilling process,Oxygen in the atmosphere and oxygen in the surface and groundwater will be mixed into the drilling fluid through mud pumps and other equipment during the circulation process.
Free oxygen, increased oxygen contentCorrosion of iron in geological spiral drill pipe,Corrosion products are black and denseFe3O4and red crispFe2O3compounds, mainly from drilling fluid treatment agents, mainly from formation water and other corrosive media includingCl-,SO42-,Ca2 ,CO32-,HCO3-Wait,Among themCl-significant impact,Small radius, strong penetrating ability,Easily through the very small pores in the surface membrane of the drill string member,Direct contact with metal,Play the role of catalysis and corrosion promotion. The phenomenon of fatigue fracture of surface materials to form pitting or spalling.
Key words:
Drill pipe, spiral, geology, geological drill pipe
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