Continuous circulating system
A technology of circulation system and input port, applied in wellbore/well components, earthwork drilling, flushing wellbore, etc., can solve the problems of downhole pressure excitation, bottom hole pressure imbalance and change, to control the back pressure value, avoid Collapse and leakage, maintain stable effect
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[0020] In order to describe in detail the technical content, structural features, achieved objectives and effects of the present invention, the following is a detailed description in conjunction with the embodiments and accompanying drawings.
[0021] See attached figure 1 And attached figure 2 , A continuous circulation system of the present invention includes a hydraulic control device 1, a flow channel switching device 2, an uninterrupted cycle shorting device 5; the flow channel switching device 2 includes a switching valve, a first input port 201, and a first output Port 202, the second output port 204; the hydraulic control device 1 and the conversion valve of the flow channel conversion device 2 are hydraulically connected through a hydraulic control tube 3, and the hydraulic control device controls the input port and each output port of the flow channel conversion device 2 The conduction conversion between. The first output port 202 of the flow path conversion device 2 ...
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