Downhole dynamic drilling tool for efficient rock breaking by using compound vibration and impact
A technology of compound vibration and power drilling tools, which is applied in the direction of impact drilling, reciprocating drilling rigs, drilling equipment, etc. Work efficiency and service life, avoid stick-slip vibration, improve rock breaking efficiency
Inactive Publication Date: 2017-06-06
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0003] The purpose of the present invention is: in order to solve the problems of the failure of the drilling tool and the low rate of penetration caused by the stick-slip vibration in the process of drilling deep wells and ultra-deep wells, and the problem that the effect of the existing hydraulic impactor is not ideal. Vibration and impact to achieve efficient rock breaking downhole dynamic drilling tool
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[0014] According to attached figure 1 As shown, the downhole dynamic drilling tool that uses compound vibration and impact to achieve efficient rock breaking consists of an outer cylinder, a positioning bearing group a, a metal motor stator, a metal motor spacer rod, a metal motor rotor, a turbine stator, a turbine rotor, a flat key, a turbine Auxiliary transmission shaft, main transmission shaft outer cylinder, eccentric wheel, main transmission shaft, upper cylindrical cam, lower cylindrical cam, return spring, impact hammer, anvil, half split ring, square sleeve, lower joint, etc. It is characterized in that the metal motor rotor and the anti-fall cap are connected in the outer cylinder through threads, and the shoulder diameter of the outer cylinder is smaller than the outer diameter of the anti-fall cap; the lower end of the shoulder in the outer cylinder is a metal motor stator cover, and the positioning bearing group a is fixed In the inner shoulder of the metal motor s...
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The invention discloses a downhole motor realizing efficient rock breaking by composite vibration impacts in order to solve the problems such as drill jamming, stick slip and low rock breaking efficiency in a deep well or an ultra-deep well. The technical scheme comprises that a metal motor rotor is connected to an anti-falling cap by threads, and a metal motor stator comprises a metal motor spacer rod and the metal motor rotor; a turbine stator and a turbine rotor are installed on a turbine assistant transmission shaft, and an eccentric wheel is fixed on the turbine assistant transmission shaft by a transmission pin; a main transmission shaft outer cylinder is connected on a main transmission shaft by a spline transmission set; a positioning bearing b is placed between the turbine transmission shaft and a cylindrical cam shell body; an upper cylindrical cam is fixed on the main transmission shaft, and a lower cylindrical cam is fixed on a punch hammer; a reset spring is clamped between the punch hammer and a cylindrical cam lower shell body; and a semi-ring is clamped in an anvil stand groove, and an all-direction sleeve is fixed on the cylindrical cam lower shell body and clamped between the cylindrical cam lower shell body and an anvil stand. The downhole motor realizing the efficient rock breaking by the composite vibration impacts disclosed by the invention can simultaneously generate stable high-frequency axial impacts and circumferential impacts in order to realize the composite vibration rock breaking.
Description
technical field [0001] The invention relates to a downhole dynamic drilling tool for realizing efficient rock breaking by using compound vibration impact in the field of oil drilling and the like. Background technique [0002] With the depletion of shallow oil and gas resources, drilling engineering has gradually developed into fields with severe environmental conditions such as deep wells and ultra-deep wells. When the depth of the well increases, the difficulty of rock breaking will increase greatly. During the drilling process, the drill bit will often experience sticking and stick-slip phenomena. These factors will reduce the rock-breaking efficiency of the drill bit and increase the difficulty of rock-breaking, resulting in a greatly reduced drill bit life and a sharp drop in the ROP. Existing axial rotary drilling tools cannot alleviate the stick-slip vibration phenomenon of the lower drilling tool, and hydraulic impactors that can produce axial impact generally have ...
Claims
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IPC IPC(8): E21B1/00
Inventor 田家林周韬杨琳杨志刘刚杨应林杜凡
Owner SOUTHWEST PETROLEUM UNIV