Rotary drill bit for excavating geothermal drilling
A technology for geothermal drilling and drill bits, which is applied in the direction of drill bits, drilling equipment, and drill pipes. It can solve the problems of motor shaft load, rotary drill bit swing, and drill breakage, and achieve the effect of protecting the motor.
Active Publication Date: 2020-10-23
湖南达道新能源开发有限公司
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Problems solved by technology
[0003] The length of the rotary drill bits equipped on the rotary drilling platform in the process of drilling deep holes often does not meet the requirements of the deep hole depth, and if a longer rotary drill bit is used, the motor of the rotary drill bit drives the longer rotary drill bit Rotate the drill hole, because the rotary drill bit is long, the other end of the rotary drill bit tends to swing too much. When it first enters the soil, the rotary drill bit hits the ground due to the large swing of the end of the rotary drill bit, which is easy to cause fracture. Drilling conditions, and because the rotary drill bit is longer, it will cause a greater burden on the shaft of the motor, which will affect the service life of the motor
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0027] Please refer to figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 as well as Figure 6 ,in figure 1 A structural schematic diagram of a preferred embodiment of a rotary drilling bit for excavating geothermal drilling provided by the present invention; figure 2 for figure 1 The schematic diagram of the structure of the top of the rotary drilling drill pipe shown; image 3 for figure 1 The schematic diagram of the cross-sectional structure of the rotary drill tip shown; Figure 4 for figure 1 The schematic diagram of the structure of the extended drill pipe shown; Figure 5 for Figure 4 The schematic diagram of the structure of the top of the extended drill pipe and the structure of the protrusion at the bottom; Figure 6 It is a schematic structural diagram of a preferred embodiment of the joint provided by the present inventi...
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The invention discloses a rotary drill bit for excavating a geothermal drilling well. The rotary drill bit comprises a rotary drill pipe, a rotary drill tip and an extended drill pipe; the rotary drill tip is arranged on the end part of the rotary drill pipe, and soil loosening teeth, a raised head and a soil discharging groove are arranged on the rotary drill tip; a groove is formed in the other end of the rotary drill pipe, a threaded hole is formed in the side wall of the groove, a protrusion corresponding to the groove is arranged on the extended drill pipe, the protrusion is connected into the groove in an inserted mode, and a screw hole corresponding to the threaded hole is disposed on the protrusion; and a bolt penetrates through and is connected with the threaded hole and the screw hole in a screwed mode, and the rotary drill pipe is connected with the extended drill pipe. The outer wall of the rotary drill pipe and the outer wall of the extended drill pipe are separately provided with a first blade and a second blade for discharging soil out of a wellbore. The rotary drill bit for excavating the geothermal drilling well meets the requirements of well drilling depth by extending the extended drill pipe.
Description
technical field [0001] The invention relates to the field of geothermal drilling bits, in particular to a rotary drilling bit for excavating geothermal drilling. Background technique [0002] In the process of developing geothermal energy, it is often necessary to drill a deep enough deep hole with a rotary drilling platform. The deep hole extends to the geothermal heat source, and by arranging a heat exchange mechanism that can take the heat source from the underground heat source into the deep hole Realize the utilization of geothermal energy. [0003] The length of the rotary drill bits equipped on the rotary drilling platform in the process of drilling deep holes often does not meet the requirements of the deep hole depth, and if a longer rotary drill bit is used, the motor of the rotary drill bit drives the longer rotary drill bit Rotate the drill hole, because the rotary drill bit is long, the other end of the rotary drill bit often swings too much. When it first ente...
Claims
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IPC IPC(8): E21B10/44E21B10/60E21B17/046E21B17/22
CPCE21B10/44E21B10/602E21B17/046E21B17/22
Inventor 刘艺辉
Owner 湖南达道新能源开发有限公司