Split type reverse jet polycrystalline diamond drill bit
A polycrystalline diamond and reverse jet technology, applied in drill bits, drill pipes, drill pipes, etc., can solve the problems of high manufacturing cost and reduce pump efficiency, and achieve the effect of reducing processing cost, improving pump efficiency and improving chip removal effect.
Active Publication Date: 2020-02-07
大庆天瑞机械制造有限公司
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Problems solved by technology
[0003] The present invention provides a split-type reverse jet polycrystalline diamond drill bit to solve the problems of high manufacturing cost and reduced pump efficiency of the existing type of drill bit proposed in the above-mentioned background technology
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Embodiment Construction
[0015] The present invention will be further described below in conjunction with accompanying drawing:
[0016] The present invention includes a drill bit body, the drill bit body includes a joint part 2 and a drilling part 6, the two are welded at the outer seam after being screwed together, and the end of the joint part 2 away from the drilling part 6 is provided with a hole for connecting a drill rod Thread, the center of the joint part 2 is provided with a liquid injection channel 10, the upper part of the chip removal channel 1 is arranged around the liquid injection channel 10, and the end of the upper part of the chip removal channel 1 close to the drilling part 6 is provided with a bell mouth 3. The drill The outer side of the drilling part 6 is a gauge, the outer end surface of the drilling part 6 is provided with a knife wing 7, the center of the drilling part 6 is provided with a nozzle channel 9, and the end of the nozzle channel 9 is provided with a detachable nozz...
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The invention belongs to the field of drilling equipment, and especially relates to a split-type backward jet polycrystalline diamond bit. The split-type backward jet polycrystalline diamond bit comprises a bit body. The bit body comprises a connector portion and a drilling portion, and the connector portion and the drilling portion are connected by threads and are welded on an outer side seam. The center of the connector portion is provided with a liquid injection channel. The periphery of the liquid injection channel is provided with a chip removal channel upper section. The center of the drilling portion is provided with a nozzle channel. The tail end of the nozzle channel is provided with a detachable nozzle which is connected by threads. The periphery of the nozzle channel is provided with a chip removal channel lower section. The inner side end face of the drilling portion is provided with an annular groove whose cross section is circular arc. The split-type backward jet polycrystalline diamond bit is designed in a split manner, and effectively reduces processing cost while ensuring use functions of the bit. The bit reduces load of a pump, improves pump efficiency, reduces bottom hole pressure difference, improves chip removing effect, and further improves rate of penetration.
Description
technical field [0001] The invention belongs to the technical field of drilling equipment, in particular to a split-type reverse jet polycrystalline diamond drill bit. Background technique [0002] In drilling operations, rock-carrying capacity is an important indicator to measure the effect of the drill bit. If the cuttings-carrying effect cannot meet the requirements, many problems will occur, such as high friction and high torque, sand sticking, casing running and Difficulty in cementing, severe wear of drilling tools, difficulty in running logging instruments, etc., may even lead to forced suspension of drilling operations. In recent years, some drill bits with reverse jet suction function have appeared. This kind of drill bit directly guides part of the drilling fluid inside the drill bit to the upper section of the chip removal channel, and promotes chip removal through the suction generated by the upward movement of this part of drilling fluid. This structure can not...
Claims
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IPC IPC(8): E21B10/46E21B10/60E21B10/61E21B17/042
CPCE21B10/46E21B10/602E21B10/61E21B17/042
Inventor 王跃忠
Owner 大庆天瑞机械制造有限公司