Repair method of working ability of diamond drill bit

Abstract

The invention relates to an operational capability repairing method of a diamond drill bit. The operational capability repairing method comprises the following steps that (1) after the diamond drill bit is lifted onto the earth surface, whether an abnormal abrasion part which affects continuous use of the drill bit exists on the diamond drill bit or nor is checked firstly, and if yes, the volume, to be repaired, of the abnormal abrasion part of the diamond drill bit is determined; (2) a diamond-contained composite material repairing layer which is similar to diamond drill bit blank in component and uniform in design requirement for diamond concentration is arranged in the abnormal abrasion part of the diamond drill bit in a filling mode, wherein the volume of the diamond-contained composite material repairing layer is uniform with the volume to be repaired and determined in the step (1); (3) through a hot pressing method or a synthetic resin and plastic bonding method or an electroplating method, the diamond-contained composite material repairing layer is fixed onto the diamond drill bit blank. The operational capability repairing method of the diamond drill bit has the advantages that diamond drill bits which lose operational capability due to abnormal abrasion can be repaired and reused, the service life of the diamond drill bits is obviously prolonged and the well drilling cost is saved.

Description

technical field [0001] The invention belongs to the field of repairing methods for diamond drill bits, and in particular relates to a repairing method for working capacity of diamond drill bits. Background technique [0002] The development of human beings is inseparable from various resources, and in the process of resource exploration and development, various drill bits need to be used in large quantities. How to effectively improve the utilization rate of drill bits and reuse the drill bits that have failed due to abnormal wear has important economic value. [0003] Drill bit wear is an inevitable phenomenon in the drilling process. There are many reasons for the abnormal wear of the drill bit, mainly including: the toughness or hardness of the drill bit material is too low; the structural parameters of the drill bit are unreasonable, making the cutting edge too fragile or the cutting force too large ;The choice of cutting amount is unreasonable, so that the cutting forc...

AI Technical Summary

Problems solved by technology

In addition, the repair of some drilling tools including PDC compact drill bits and impact drill bits also reduces the structural size of the original drill bit, which is not conducive to maximizing the life of the drill bit

[0005] Welding operations are not possible for diamond bits formed by powder compaction, and the welding method is not suitable for diamond bits formed by thermocompression of composite materials

At present, there is no research and application on the repair of diamond matrix drill bits, so it is urgent to find a method for repairing diamond drill bits that have lost their working ability, so as to reduce the waste of diamond drill bits and save costs

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