Anti-blocking PDC (Polycrystalline Diamond Compact) drill bit

Abstract

The invention discloses an anti-blocking PDC (Polycrystalline Diamond Compact) drill bit and relates to the technical field of PDC drill bits. The drill bit comprises a driving rod fixedly mounted ona fixed plate; an inner box is fixedly mounted at the lower part of the driving rod; a plurality of side cutting plates are fixedly mounted outside the inner box; a moving plate is mounted in the inner box through a sliding mechanism; two reset springs are fixedly installed between the moving plate and the inner box; an incomplete gear is rotatably installed in the inner box through a servo motor;a toothed bar is slidably installed in the inner box, and the toothed bar is matched with the incomplete gear; and a partition plate and an air sleeve are fixedly installed in the inner box, and tworeturn springs are in communication between the partition plate and the air sleeve. The anti-blocking PDC drill bit has the advantages that sludge attached to the side cutting plates can be cleaned toa certain degree when the inner box rotates for cutting, the side cutting plates and the inner box can be intermittently and automatically flushed during work, the cleaning efficiency is high, cleaning is comprehensive, and normal work of the drill bit is affected.

Description

technical field [0001] The invention relates to the technical field of PDC drill bits, in particular to an anti-blocking PDC drill bit. Background technique [0002] PDC bit refers to a bit made of polycrystalline diamond composite material, which is widely used in the oil drilling industry. Because its hardness is lower than that of natural diamond, it is generally only suitable for soft to medium hard formations; [0003] Existing PDC drill bits also have the following deficiencies: [0004] 1. In the drilling work, some mudstone formations with strong plasticity are often drilled. This situation will easily lead to the increase of mud shear force. At this time, the flow channel of the PDC bit is prone to mud balling, resulting in a decrease in the drilling speed. The existing drill bit It is impossible to automatically clean the mud on the drill bit during work, and subsequent manual flushing is required, which is troublesome and affects work efficiency; [0005] 2. The...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem in the prior art that the mud on the drill bit cannot be cleaned intermittently and automatically when the drill bit is working, and proposes an anti-blocking PDC drill bit

Images