Integral full consumption self-complementing combined drilling tool

Abstract

The invention relates to an integral total consumption self-supplementing type combined drilling tool. According to the technical scheme of the integral total consumption self-supplementing type combined drilling tool, a twist drill body and a handle part are included, the twist drill body is provided with one or more sets of convex spiral cutting backs and one or more sets of concave spiral scrap discharging grooves, the center of each of the twist drill body and the handle part is of a hollow structure, a plurality of sets of cutter containing holes are milled in the cutting backs, and welding holes are drilled from the scrap discharging grooves to communicate into the cutter containing holes; and a hard abrasion resisting alloy block is arranged in each cutter containing hole, molten copper is poured into the cutter containing holes through the welding holes, the molten copper enters gaps between the hard abrasion resisting alloy blocks and the cutter containing holes, and after cooling, the hard abrasion resisting alloy blocks are fixed in the cutter containing holes. The integral total consumption self-supplementing type combined drilling tool has the beneficial effects that the hard abrasion resisting alloy blocks penetrate through a drill bit and are sequentially arranged and combined, accordingly, when the drill bit is abraded, the alloy blocks are abraded at the same time, and since the hard abrasion resisting alloy blocks and the drill bit are integrated, the drill bit can be made long, and accordingly the drilling tool replacement frequency can be reduced.

Description

technical field [0001] The invention relates to a drilling tool and a method for oil and gas drilling, in particular to an integral full-consumption self-replenishing combined drilling tool. Background technique [0002] In the process of oil and natural gas development, drilling is an important job, and in the process of drilling, drilling tools play a very important role. In the current drilling tools, pdc drill bits or roller cone bits are generally used. The existing pdc drill bits The drill bit is formed by welding hard wear-resistant materials to the drill body. The problem is: its service life is generally about 150 meters, and the drill bit needs to be replaced. The existing oil drilling depth is 6000-7000 meters. The length of a horizontal well can reach 15,000 meters, and the drill bit replacement operation needs to take out all the drill pipes from the wellhead to replace the drill bits. For example, a deep well with a depth of 6000-7000 meters requires at least 3...

AI Technical Summary

Problems solved by technology

[0002] In the process of oil and natural gas development, drilling is an important job, and in the process of drilling, drilling tools play a very important role. In the current drilling tools, pdc drill bits or roller cone bits are generally used. The existing pdc drill bits The drill bit is formed by welding hard wear-resistant materials to the drill body. The problem is: its service life is generally about 150 meters, and the drill bit needs to be replaced. The existing oil drilling depth is 6000-7000 meters. The length of a horizontal well can reach 15,000 meters, and the drill bit replacement operation needs to take out all the drill pipes from the wellhead to replace the drill bits. For example, a deep well with a depth of 6000-7000 meters requires at least 3 days to pull out the drill pipes. After replacing the drill bits, it will be used for at least 3 days The time required to go down to the bottom of the well for drilling work, that is to say, it takes nearly a week to replace the drill bit, and each pdc drill bit can only drill 150 meters, because of this time cost, the cost of drilling is high, and the longer the well depth The cost is higher; in addition, after the drilling is completed, the cementing operation of the oil well is required. If the cementing is not timely, it may cause the drilled oil well to collapse, resulting in the failure of the entire production operation of the well, including the early exploration operations, drilling Construction, therefore, it is necessary to carry out cementing operations on the drilled oil wells as soon as possible, and the frequent replacement of drill bits during the drilling process not only takes up the time of cementing operations, but also frequent lifting and lowering operations will lead to poor geological conditions. A subsidence occurs, causing the failure of the entire well operation

[0003] At present, the research on drill bits for oil drilling mainly focuses on materials, heat treatment, circulation, etc., which have improved the drilling depth to a certain extent, but they all have a characteristic, that is, they have not broken through the compensation problem after the drilling tool is consumed. The service life of the drill bit is greatly limited, so the problem is that the replacement frequency of the drill bit is still high, and the drilling cost has been reduced, but overall it is still very expensive

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