Reduction-resistant vibration-damping break-proof righting coupling for gas drilling

Abstract

The invention provides an antidrag, vibration-damping, break-proof and strengthening coupling which is utilized in the oil-gas field which has a gas drilling which has strong vibration, high frictional resistance, erosion and is easy to be inoperative. The technical proposal is that: the upper and lower joints are coupled by threads and is positioned by a shaft shoulder; a radial rolling bearing is consist of an upper set and a lower set of cylindrical roller bearings without inner ring, wherein one set is arranged between the shell and the upper adapter, and the other set is arranged between the shell and the lower adapter and positioned by a sleeve; three posing belts are symmetrically distributed on the outer surface of the shell, and the two ends of the posing belt is plagiohedral and the posing belt is provided with a groove; an axial rolling bearing consists of three sets of drum-shaped rollers which are respectively arranged in the grooves of the posing belts on the outer surface of the shell and touch against the borehole wall or the sleeve; a shock-absorbing rubber sleeve is arranged between the upper and lower radial rolling bearings without inner ring and the shell and is positioned by a sleeve. This invention has good shock-absorbing performance, strong vibration-absorbing capacity and can relieve the abrasion of the drill stem/sleeve, reduce torque and increase drilling capacity; furthermore, the structure is simple and the cost is low.

Description

technical field [0001] The invention relates to a drag-reducing, vibration-reducing, anti-breakage and anti-stabilizing coupling for gas drilling, which is especially suitable for gas drilling with strong vibration, high frictional resistance, erosion and prone to failure. Background technique [0002] Gas drilling has achieved rapid development due to its advantages of greatly increasing the rate of penetration and effectively discovering and protecting oil and gas layers. Its typical technical features are: when drilling into the reservoir, keep the bottomhole pressure of the circulating medium (gas or gas-based fluid) lower than the reservoir pressure, realize controllable drilling while spraying, or (and) use lower density The gas-based circulating medium reduces the pressure on the rock at the bottom of the hole, so as to obtain a higher ROP. [0003] Gas drilling was first explored in the 1950s. Due to the limitation of supporting technology and equipment, this techno...

AI Technical Summary

Problems solved by technology

In particular, it was found that cavitation exists objectively and is difficult to alleviate. The corrosion is relatively slight, but under the excitation of high-frequency and high-stress vibration, the effects of corrosion and cavitation will be amplified; the coupling of the three leads to the abnormality of the drilling tool. aging

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