A pdc drill bit used in a hydraulic rotary punching device

Abstract

The invention relates to a bit for hydraulic rotary percussion equipment. The hydraulic rotary percussion equipment comprises a fixture, a drilling depth control unit, a drilling depth measuring unit, a pressure measurement sensor, a pressure rotary unit, a pressurizing unit, a PDC (polycrystalline diamond compact) bit, a rock sample, and a rock sample regulator. The PDC bit uses regular hexagonal teeth as main drilling teeth. The mechanical instability and deflection of a drill rod and the percussive action between the bit and the rock sample are introduced to the hydraulic rotary percussion equipment; the features of the PDC bit during actual drilling are truly simulated and reflected partly; the PDC bit using the regular hexagonal teeth as the main drilling teeth can easily drill into a formation, can well drill apart non-homogenous formations such as rigid, abrasive and rigid-soft compound formations, and allows a higher drilling speed.

Description

technical field [0001] The present invention relates to the field of oil and gas drilling tools, and further relates to polycrystalline diamond compact drill bits (hereinafter referred to as PDC drill bits) widely used in oil and gas drilling operations, and more specifically to a hydraulic rotary punch for drilling sample characteristics The drill bit used by the device. Background technique [0002] Drill bit is the most important tool in drilling operations, and its working performance will directly affect the quality, cost and efficiency of drilling operations. With the surge in demand for oil resources and the increase in oil development, the number of drilling rigs has surged, and drilling activity has reached the highest level in recent years. At present, the number of deep wells and ultra-deep wells in my country has increased significantly. With the increase of well depth, the drilling speed has decreased significantly. In order to increase supply and meet demand,...

AI Technical Summary

Problems solved by technology

These modified experimental devices can test the drillability of the drill bit to the rock to a certain extent, but a common feature of these devices is that the rock sample to be drilled and the drill bit are strictly clamped by the clamps of the drilling machine, milling machine, and lathe. In fact, the movement between the two is still carried out according to the precise transmission of the machine tool. In the actual production process of drilling, the PDC bit is installed at the bottom of the drill pipe and is in contact with the rock formation to be drilled. Due to the length of the drill pipe, it is affected Various complex mechanical phenomena such as destabilization and deflection occur after force, so the motion between the PDC bit and the rock formation to be drilled is not the rotary cutting motion (ie, drilling motion) that is simply simulated by the existing experimental devices. There are also interactions such as impact and extrusion, and these effects are not simulated in the existing experimental devices.

In addition, in the existing experimental devices, ordinary PDC drill bits are mostly used, and the drilling characteristics of these drill bits have been studied thoroughly, but there are few studies on the drilling characteristics of some special-shaped cutting teeth. The special-shaped cutter PDC bit of the hydraulic rotary punching device for the drilling characteristic experiment

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