Mechanical reciprocating type impact screw
A reciprocating and screw technology used in screw drilling tools and mechanical reciprocating impact screws. It can solve the problems of supporting pressure and excessive static friction, and achieve the effect of strong fault tolerance, stable performance and little interference.
Pending Publication Date: 2020-07-17
闭磊 +1
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Problems solved by technology
Existing screw drilling tools cannot effectively solve the problem of excessive static friction and supporting pressure in directional drilling
Method used
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Embodiment
[0032] see Figure 1-5 , the present invention provides a technical solution: a mechanical reciprocating impact screw, including a mud inlet 12 and an impact chamber short 1, characterized in that: the two ends of the impact chamber short 1 are rotatably connected to a rotating mandrel 2, so There is an impact hammer 3 in the cavity formed between the impact chamber short 1 and the rotating mandrel 2, and the impact hammer 3 forms a first hydraulic pressure inside the cavity formed between the impact chamber short 1 and the rotating mandrel 2. cavity 9 and the second hydraulic cavity 10, the impact hammer 3 is slidingly connected with the impact cavity short-circuit 1, the impact hammer 3 has an impact hammer channel 15 inside, and the rotating mandrel 2 is provided with a nozzle 4 and a mandrel channel 14 and mud outlet 11.
[0033] In this embodiment, specifically: the impact hammer channel 15 inside the impact hammer 3 includes a first impact hammer channel 151 and a secon...
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The invention discloses a mechanical reciprocating type impact screw which comprises a mud inlet and an impact cavity short joint. The two ends of the impact cavity short joint are rotationally connected with a rotating core shaft. An impact hammer is in sliding connection into a cavity formed by the impact cavity short joint and the rotating core shaft to form a first hydraulic cavity and a second hydraulic cavity, and a nozzle, a core shaft channel and a mud outlet are arranged on the rotating core shaft. Mud enters the core shaft channel, and when mud passes through the nozzle, the upper portion of the nozzle is a high pressure area, and the lower portion of the nozzle is a low pressure area. When the rotating core shaft rotates, mud in the high pressure area enters a second channel ofthe impact hammer through a high pressure channel, so that the second hydraulic cavity serves as the high pressure area, mud in the low pressure area enters a first channel of the impact hammer through a low pressure channel, so that the first hydraulic cavity serves as the low pressure area, and the impact hammer is lifted up; when mud in the high pressure area enters the first channel of the impact hammer through the high pressure channel, the first hydraulic cavity serves as the high pressure area, the second hydraulic cavity serves as the low pressure area, hammering is achieved downwards,and impact force is generated; and the rotating core shaft rotates constantly, hammering is achieved repeatedly, and continuous impact force is generated.
Description
technical field [0001] The invention belongs to the technical field of drilling machinery, and relates to a screw drilling tool, in particular to a mechanical reciprocating impact screw. Background technique [0002] The screw drilling tool is a downhole power drilling tool with drilling fluid (or compressed gas) as the power source, and it is a positive displacement motor. When the mud pumped by the mud pump flows through the bypass valve and enters the motor, a certain pressure difference is formed at the inlet and outlet of the motor, which pushes the rotor to rotate around the axis of the stator, and transmits the speed and torque to the drill bit through the cardan shaft and the transmission shaft Break rock and drill to realize drilling operation. [0003] The current drilling tends to be more directional drilling and horizontal drilling, and various screw drilling tools are widely used. When drilling, conventional drilling equipment such as drilling rigs, mud pumps,...
Claims
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IPC IPC(8): E21B4/14E21B17/18
CPCE21B4/14E21B17/18
Inventor 闭磊杜向东
Owner 闭磊