Guide milling shoe inner nozzle and milling shoe with same

Abstract

The invention provides a milling shoe inner nozzle and a milling shoe with the same, and the milling shoe inner nozzle is arranged in the milling shoe and comprises an inner cylinder and a piston; the inner barrel is hollow and forms a first concave part and a second concave part, the diameter of the first concave part is larger than that of the second concave part, the end, close to the first concave part, of the second concave part protrudes inwards to form an annular table, and threads are arranged at the end, away from the second concave part, of the inner barrel; the piston is arranged in the second concave part, one end of the piston abuts against the annular table, a through hole is formed in the center of the piston, the diameter of one end of the through hole is larger than that of the other end of the through hole, the large-diameter end of the through hole faces the annular table, an arc protruding inwards is arranged between the two ends of the through hole, and the maximum diameter of the through hole is not larger than the diameter of the inner wall of the annular table. A milling shoe with a nozzle comprises a milling shoe body and a guide milling shoe inner nozzle installed in the milling shoe body. The construction success probability is improved, the working temperature of the milling shoe is reduced, the service life is prolonged, the cost is saved, installation is convenient, and the requirements of different construction conditions are met.

Description

technical field [0001] The invention relates to the technical field of oil and gas field drilling, in particular to a nozzle in a grinding shoe and a grinding shoe with the nozzle. Background technique [0002] In the development process of oil, shale gas, natural gas, etc., there are mainly a variety of window opening operations, and the window opening operation requires the use of guide grinding shoes, but due to the high temperature of the guide grinding shoes during operation, the working conditions are very It is very bad, and it is very easy to cause damage to the equipment, thus affecting the smooth progress of the mining work. These window opening methods all need to carry out seat hanging and window opening construction operations first, and three of them need to check the valve in the process of sitting and hanging. For the switch operation, if it is found that the valve cannot be closed during the construction process, the window opening operation cannot be carrie...

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Problems solved by technology

[0002] In the development process of oil, shale gas, natural gas, etc., there are mainly a variety of window opening operations, and the window opening operation requires the use of guide grinding shoes, but due to the high temperature of the guide grinding shoes during operation, the working conditions are very It is very bad, and it is very easy to cause damage to the equipment, thus affecting the smooth progress of the mining work. These window opening methods all need to carry out seat hanging and window opening construction operations first, and three of them need to check the valve in the process of sitting and hanging. For the switch operation, if it is found that the valve cannot be closed during the construction process, the window opening operation cannot be carried out, and the drill bit needs to be taken out of the well and then reassembled, which greatly wastes mining time and consumes additional manpower Material resources increase the cost. Based on the above situation, at this stage, a simple and practical fourth window opening method that can be sat and hung without affecting the window opening operation and construction is needed. This window opening method needs to use a new type and is compatible with matching sandals

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