A New Type of Hydraulic Oscillator with Vertical Valve Structure
A technology of hydraulic oscillator and vertical valve, which is applied in the direction of drilling with vibration, can solve the problems such as the non-adjustable ratio of rotational speed to axial vibration frequency and the limited increase of pulse amplitude, so as to improve drilling efficiency, long service life, reduce The effect of drilling costs
Inactive Publication Date: 2017-06-23
YANGTZE UNIVERSITY
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Problems solved by technology
[0003] The object of the present invention is to provide a new type of hydraulic oscillator with a vertical valve structure that adopts a vertical valve, the ratio of the rotational speed and the vibration frequency can be adjusted, effectively reduces friction, improves drilling efficiency, reduces drilling costs, and has a long service life; The ratio of technical speed to axial vibration frequency cannot be adjusted, and the problem of limited increase in pulse amplitude
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[0019] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0020] The new hydraulic oscillator with the vertical valve structure is composed of an oscillation sub-section 1, a sub-section 2, and a power sub-section 3, and is characterized in that: the oscillation sub-section 1 is connected with the power sub-section 3 through the sub-section 2; Key shaft 101, connecting sleeve 102, seal 103, oscillating nipple housing 104, butterfly spring 105; power nipple 3 consists of positioning sleeve 301, righting bearing 302, turbine rotor 303, turbine stator 304, power nipple housing 305 , housing inner bump 306, adjustment sleeve A307, flow stop head 308, flow limiting sleeve 309, adjustment sleeve B310, thrust bearing 311, turbine shaft 312, and lower joint 313; power nipple housing 305 is made with housing inner protrusion Block 306.
[0021] The spline shaft 101 of the oscillating short joint 1 is slidingly connected to the conne...
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The invention relates to a novel hydraulic oscillator with a vertical valve structure, which belongs to the technical field of drilling tools for oil and natural gas exploitation. It is composed of an oscillating sub-joint and a power sub-joint, and its characteristics are: the spline shaft of the oscillating sub-joint is in sliding connection with the connecting sleeve, and the connecting sleeve is connected with the casing of the oscillating sub-joint; Belleville spring. Inside the casing of the power nipple, there are projections in the casing, which correspond to the corresponding flow passages on the turbine shaft. The projections in the casing and the flow passages form a dynamic standing valve. With the rotation of the turbine shaft, the flow area changes periodically to generate simple harmonic pressure pulses. Drive the vibrating short joint for periodic axial vibration. By adjusting the number of protrusions in the casing and the number of flow passage openings of the turbine shaft 312, the ratio of the rotational speed to the vibration frequency can be adjusted. Effectively reduce friction, improve drilling efficiency, reduce drilling cost, and have long service life; it solves the problems of the existing technology that the ratio of rotational speed and axial vibration frequency cannot be adjusted, and the increase of pulse amplitude is limited.
Description
technical field [0001] The invention relates to a novel hydraulic oscillator with a vertical valve structure, which belongs to the technical field of drilling tools for oil and natural gas exploitation. Background technique [0002] In horizontal wells and extended-reach wells, with the increase of well penetration depth, the friction between the drill string and the well wall gradually increases, resulting in the loss of pressure on bit, which is not conducive to the increase of ROP, and also seriously affects the target diameter of drilling. This is also an important factor restricting the development of horizontal well technology. For directional wells and horizontal wells, high friction will also form curved boreholes, which will reduce the ability of the drilling rig to reach the maximum depth. Or in the horizontal section that is too long, there will be relatively large friction and back pressure, and the WOB cannot be effectively applied. The hydraulic oscillator ca...
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IPC IPC(8): E21B7/24
Inventor 冯定吕加华夏成宇张红向如向正新
Owner YANGTZE UNIVERSITY