Wear-resistant and erosion-resistant screw drill for in-situ mining of oil shale and machining technology

Abstract

The invention discloses a wear-resistant and erosion-resistant screw drill for in-situ mining of oil shale and a machining technology. The wear-resistant and erosion-resistant screw drill comprises the following technology steps of (1) manufacturing a non-rubber synthetic neck bush, specifically, adding 10%-15% of polytetrafluoroethylene, 8%-12% of 3-12 millimeters aramid fiber 1313, 10%-18% of silicon carbide fiber with the diameter of 0.5-1.2 micro meters and the length of 30-160 micro meters and 15%-25% of polymethyl methacrylate into a mixer, mixing and stirring at a high speed for 0.5 hour, performing high-speed shearing, adding 30%-35% of styrene into the uniformly stirred mixture, adding 3%-4% of a diethylenetriamine solubilizer, 2%-5% of a molybdenum disulfide additive, 3%-5% of a vulcanization accelerator and 2%-4% of a dioctyl sebacate softener into an internal mixer, mixing for 2-2.5 hours at the temperature of 210-280 DEG C, and vulcanizing for 12 hours at the vulcanization temperature of 160-190 DEG C to prepare a non-rubber synthetic lining material; and (2) manufacturing a motor stator metal shell, a motor rotor and a rubber locking sleeve.

Description

technical field [0001] The invention relates to a wear-resistant and corrosion-resistant screw drilling tool for in-situ mining of oil shale and a processing technology. Background technique [0002] Petroleum is a non-renewable resource. With the rapid development of the economy, human demand for energy is increasing rapidly. The shale oil resource reserves are huge. The world's proven reserves are about 450 billion tons. In 2020, the world's shale oil supply has reached 2 million barrels per day is a reliable supplement to oil resources. Shale oil refers to the petroleum resources contained in shale-based shale formations. It is a kind of unconventional petroleum, including oil in pores and fractures of mud shale, and tight carbonatite or rock in mud shale formations. Petroleum resources in clastic formations and interlayers. Among them, fracture type and pore type are the important targets of shale oil exploration and development. Shale oil extraction methods include o...

AI Technical Summary

Problems solved by technology

[0003] Oil shale drilling is mostly horizontal directional wells with deep well positions and high well pressure. Due to formation reasons, the operation time is long and there are many cuttings, often accompanied by highly corrosive shale gas. Conventional screw drilling tool stators The inner lining is made of rubber material. Due to the high well pressure and long working time, there are many fine cuttings particles entering the circulating fluid, which will corrode the stator inner lining and rotor helical surface of the screw drilling motor for a long time, which will cause the stator Excessive wear of rubber, especially rubber is easy to erode, deform, age, and fall off, making the motor invalid and even causing accidents

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