Drill pipe clamping and straightening device with two-way position compensation function and drilling straightening method

Abstract

A drill pipe clamping and straightening device with two-way position compensation function and a drilling straightening method, the device includes a main support body, a clamping assembly, an axial position compensation assembly and a centralization assembly, and the clamping assembly is detachably arranged on In the main support body, the righting assembly is located on one outer side of the main support body for righting operation, the axial position compensation assembly is located on both outer sides of the main support body for axial position compensation, and the clamping The assembly includes a driving mechanism, a clamping mechanism and a compensation mechanism for lateral compensation; thus, the present invention can provide greater force with a small volume and mass, and the clamping force is more stable. It adopts a closed structure to prevent Cinder, rock and soil enter into the clamper, resulting in stuck and insufficient clamping force. The stress condition is good and the strength is high. It can prevent the drill pipe from being damaged when constructing upward holes, downward inclined holes and horizontal holes. At the same time, it can ensure the centering of the lateral position of the drill pipe and prevent the wear of the drill pipe.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to a drilling rod clamping and straightening device with a bidirectional position compensation function and a drilling straightening method. Background technique [0002] During the drilling construction process, loading and unloading the drill pipe is an important link. Every time the drill pipe is loaded and unloaded, a process of unscrewing the drill pipe is required. To unscrew the drill pipe, the first step is to ensure that the drill pipe is effectively clamped and normal. During the drilling process, due to the large swing of the drill pipe, it is generally necessary to install an additional erecting device to reduce the vibration of the rig body, and an axial and lateral position compensation device is required to reduce the offset and misalignment caused by the drill pipe swing. For the wear of the drill pipe, the invention relates to a device integrating the fun...

AI Technical Summary

Problems solved by technology

[0003] By searching the existing relevant patents, it is found that in the current drilling construction process, the commonly used drill pipe clamps are mostly open and disc spring clamping clamps, and there are the following problems: In order to provide sufficient displacement and clamping force, requires multiple large-diameter disc springs, resulting in large structural size and weight of the holder, difficult handling and installation, and with the prolongation of service time, the wear of the springs increases, the cycle life decreases, and the elastic force weakens; the slips are stressed The surface is relatively weak, and the installation direction of the slips needs to be changed when constructing upward and downward holes; when unscrewing and unscrewing the drill pipe, the clamper does not have the position compensation function along the drill pipe axis, and the screw thread of the drill guide rod is stressed, and the wear is serious ;It does not have the function of righting, it needs to install an additional centering device, and the assembly error will make it difficult to align the two, which will aggravate the wear of the drill pipe; it does not have the function of lateral position compensation, and the drill pipe will be clamped and righted during the drilling process The mechanism swings left and right, causing serious misalignment, which aggravates the wear of the drill pipe; with the open form, the clamper is exposed, and coal, gangue, and rock and soil are often stuffed into the clamper, resulting in clamping stagnation or clamping Lack of strength

[0004] In the prior art, such as a drilling rod clamper with a floating function for an automatic drilling machine (application number 201420121544.9), it is mentioned in the specification that "the drill rod located below can rely on its own weight to drive the drill rod clamping mechanism along the The axis of the drill pipe moves downward, which makes it easier to untie the threaded thread connecting the two drill pipes.” Combining the content of the patent application and the accompanying drawings, it can be known that this type of holder is only available when constructing upholes. Floating function, but it cannot float when constructing inclined holes and horizontal holes, and its floating related components are placed inside the main support body, and the "drill pipe clamping mechanism" will be pushed against the "side plate" during the breakout process, which cannot be realized float

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