Pressure-maintaining coring mechanism, rope pressure-maintaining coring device and pressure-maintaining coring method
The invention belongs to the technical field of well drilling coring, and discloses a pressure maintaining coring mechanism which comprises a pressure maintaining coring device, a pressure maintaining bin assembly, a plugging ring and a pressure divider. The pressure maintaining coring device compri...
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Main Authors | , , , , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
11.06.2024
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Subjects | |
Online Access | Get full text |
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Summary: | The invention belongs to the technical field of well drilling coring, and discloses a pressure maintaining coring mechanism which comprises a pressure maintaining coring device, a pressure maintaining bin assembly, a plugging ring and a pressure divider. The pressure maintaining coring device comprises a heat preservation pipe and an inner layer pipe, the inner layer pipe is coaxially arranged in the heat preservation pipe, and a first annular space is formed between the inner layer pipe and the heat preservation pipe; the pressure maintaining bin assembly comprises a carrying pipe, and a sealing seat is inserted into the inner-layer pipe in a sealed mode to form a second annulus. The carrying pipe comprises an inner wall and an outer wall, a sealed third annular space is formed between the inner wall and the outer wall, and the carrying pipe has elasticity; the plugging ring is hermetically inserted into the inner-layer pipe to plug the second annulus; the pressure divider comprises a pressure dividing drivi |
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Bibliography: | Application Number: CN202410454864 |