Manufacturing method of integral full consumption self-replenishment combined drilling tool

Abstract

The invention relates to an overall total-consumption self-compensation combined drill method. The method is characterized by comprising a twist drill main body and a handle part; one or more sets of projected spiral cutting backs and one or more sets of recessed spiral chip discharge grooves are arranged on the twist drill main body; the centers of the twist drill main body and the handle part are of hollow structures; multiple sets of cutter accommodating holes are milled in the cutting backs; welding holes are drilled to communicate into the cutter accommodating holes from the chip discharge grooves; hard wear-resistance alloy blocks are mounted in all the cutter accommodating holes; molten copper is cast in the cutter accommodating holes through the welding holes, is fed in gaps between the hard wear-resistance alloy blocks and the cutter accommodating holes; and the hard wear-resistance alloy blocks are fixed in the cutter accommodating holes after cooling. The method has the following beneficial effects: as the hard wear-resistance alloy blocks are inserted in a drill bit, and are arranged and combined in sequence, when the drill bit is worn, the alloy blocks are also worn; and as the hard wear-resistance alloy blocks and the drill bit are integrated as a whole, and the drill bit can be longer, the drill replacement frequency can be reduced.

Description

technical field [0001] The invention relates to a drilling tool and method for drilling oil and natural gas wells, in particular to a manufacturing method of 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 o...

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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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