A high-power drilling axial impact speed-increasing tool

Abstract

A high-power drilling axial impact speed-increasing tool. The shaft punch assembly is sequentially provided with an impact hammer, a sliding sleeve and a center pipe from the outside to the inside. The shaft punch spline connection body assembly includes a block and a spline lower joint. There are upper and lower starting chambers in the middle of the impact hammer for pushing the sliding sleeve to move up and down, and upper and lower high-pressure chambers for pushing the impact hammer up and down to hit the impact block are left between the upper joint and the impact block. The collision block is fixedly connected with the lower joint of the spline, the drill bit is installed on the lower joint of the spline, the upper end of the center pipe is fixedly connected with the upper joint, and the lower end communicates with the drill bit. Convert the fluid energy of high-pressure drilling fluid into axial impact energy, and directly act on the drill bit with high-frequency, uniform and stable impact energy, which can directly apply additional axial impact energy while the drill bit is rotating and drilling, which can greatly improve the mechanical The speed of penetration and the ability to break rocks in hard formations shorten the drilling cycle and greatly improve the economic benefits of drilling operations.

Description

technical field [0001] The invention relates to the technical field of drilling supporting equipment in the drilling industry, in particular to a high-power drilling axial impact speed-increasing tool. Background technique [0002] With the deepening of exploration and development of oil and gas resources, more and more deep wells, ultra-deep wells, deviated wells, and horizontal wells have encountered "three-high formations" (high rock hardness, high rock drillability grade value, and high rock abrasiveness. ) is more and more likely, which seriously affects the ROP and exploration and development costs in deep formations. [0003] Under normal drilling conditions, the PDC bit can continuously shear and drill into the formation, but when drilling rock and hard formations with the PDC bit, there is usually not enough torque to break the formation rock, so that the drill bit stops rotating instantly, and the torque energy begins at this time. When the torque of the drill pip...

AI Technical Summary

Problems solved by technology

Both indoor tests and field practice have shown that sticking, sticking, and sliding vibrations are important factors leading to bit failure and low drilling efficiency, which will directly damage the cutting teeth of the PDC bit and reduce the service life of the bit and the bottom drilling tool

[0004] At present, the tools developed for drilling sticking, sticking, and slipping are mainly companies in the United States and Canada. However, due to the design defects of these tools and the damage of parts due to high-pressure erosion, the main defects are still in the work of similar products at home and abroad. Only a single torsional impact is generated, and the torsional impact is transmitted to the drill bit on the outer casing, so that the torsional impact torque is consumed in a large amount on the drill pipe and the outer casing, and the torque that can reach the drill bit is very limited.

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