A pulsed helical percussion drilling tool
A percussion drilling and pulse-type technology, which is applied in drilling equipment, driving devices for drilling in boreholes, earthwork drilling and production, etc., can solve the problems of lower energy transfer efficiency, easy blockage of flow channels, energy dissipation, etc., and achieve simple structure , increase the rock velocity, increase the effect of rock crushing volume
Inactive Publication Date: 2021-08-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
However, the power components such as screws and turbines in existing drilling tools have poor stability in high-temperature and high-pressure environments in deep and ultra-deep wells, and the structure of hydraulic valves is complex. Impact mechanism components reduce energy transfer efficiency and cause energy dissipation
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Embodiment
[0013]The main structure of the pulsed helical percussion drilling tool described in this embodiment includes an upper casing 1, a pulse nozzle 2, an impact hammer seat 3, a lower casing 4, a transmission nipple 5 and a sealing assembly 6, wherein the impact hammer seat 3 includes a hammer Seat inlet 31, spiral cone surface 32, spiral flow channel 33, hammer seat outlet 34 and sealing groove 35; the upper male buckle end of the upper shell 1 is threaded with the external drill collar, the lower part is threaded with the lower shell 4, and the lower shell The lower end of the outer cylindrical surface of the body 4 is a rectangular structural tooth uniformly distributed along the circumference. The rectangular structural tooth is composed of a lower housing tooth bottom 41, a lower housing tooth side 42, and a lower housing tooth top 43. The lower housing tooth bottom 41, The tooth side 42 of the lower casing and the tooth top 43 of the lower casing are respectively fitted with ...
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The invention belongs to the technical field of petroleum and natural gas drilling supporting equipment, and relates to a pulse type helical percussion drilling tool. The upper part of the upper shell is threadedly connected with the outer drill collar, the lower part is threadedly connected with the lower shell, and the pulse nozzle is fixed at the entrance of the upper shell. At the lower end, the impact hammer seat is located at the lower end of the pulse nozzle. The impact hammer seat is in contact with the upper shell through the sealing assembly to form a sliding fit. There are three spiral flow channels evenly distributed along the circumference inside the impact base. The upper end of the transmission nipple passes through the upper hole thread and the impact The hammer seat is connected, the lower end is connected with the external drill bit through the lower hole thread, the upper shell is provided with a diameter-changing step, and the upper shell and the lower shell cooperate to form a limit step; the structure is simple, the operation is convenient, the use is safe, and it can produce High-frequency axial and torsional impact loads, the two impacts work together to improve the rock-breaking efficiency of the drill bit and protect the drilling tool.
Description
technical field [0001] The invention belongs to the technical field of supporting equipment for oil and gas drilling, and relates to a pulsed helical percussion drilling tool, in particular to a drilling tool capable of improving the rock-breaking efficiency of a PDC drill bit and reducing the vibration of a bottom drilling tool. Background technique [0002] At present, in order to improve the rock-breaking efficiency of deep wells and ultra-deep wells in hard rock formations, axial and torsional compound percussion drilling technologies have been developed. According to different driving modes, they mainly include power component type, hydraulic valve type and fluid pulse type. Among them, the power component type The principle is that the screw or turbine assembly drives the impact hammer to rotate, and the rotary motion of the impact hammer is converted into periodic axial and torsional impact effects through the slope boss. CN105525868B discloses a pulsating two-way impa...
Claims
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IPC IPC(8): E21B4/16
Inventor 刘书斌倪红坚
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)