A polycrystalline diamond composite bit adjusted according to rock hardness

Key words: rock, polycrystalline diamond, composite bit |2018-06-20 08:50:27| industry patent

Application number: 201721719181.9

Application date: November 30, 2017

Applicant: ma junchi

Inventor: horse gallop;Gui-hua Yang

Abstract: the utility model discloses a polycrystalline diamond composite bit adjusted according to rock hardness, including: at least one pair of polycrystalline diamond composite bit and a bit stroke measuring device;The deputy polycrystalline diamond composite bit is connected with the rotary head control device.The bit stroke measuring device is used to measure the stroke of the main polycrystalline diamond composite bit in unit time and send the stroke to the rotary head control device.The rotary head control device is used to control the rotation or non-rotation of the auxiliary polycrystalline diamond composite bit according to the stroke of the main polycrystalline diamond composite bit in unit time.To solve the problem that if the main polycrystalline diamond composite bit and a auxiliary polycrystalline diamond composite bit rotate at the same time in rock strata with low hardness, excessive rotation strength will cause excessive damage to the surrounding rock strata and increase the difficulty of well construction in the future. 

Main claim:

A polycrystalline diamond composite bit, adjusted according to rock hardness, is characterized in that it includes: a main polycrystalline diamond composite bit (1), at least one auxiliary polycrystalline diamond composite bit (2) and a bit stroke measuring device (3);The main polycrystalline diamond composite bit (1) and the accessory polycrystalline diamond composite bit (2) are fixed on the drilling tool, and the accessory polycrystalline diamond composite bit (2) is connected with the rotary head control device (4);The bit stroke measuring device (3) is used to measure the stroke of the main polycrystalline diamond composite bit (1) in unit time and send the stroke to the rotary head control device (4);The rotary head control device (4) is used to control the rotation or non-rotation of the auxiliary polycrystalline diamond composite bit (2) according to the stroke of the main polycrystalline diamond composite bit (1) in unit time.
 

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