Downhole surge reduction method and apparatus
a surge reduction and downhole technology, applied in the direction of fluid removal, sealing/packing, borehole/well accessories, etc., can solve the problems of inconvenient use of tools, ineffective reduction of surge pressure, and inability to effectively circulate mud around the end
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[0045] In oilfield applications, a "drilling / production liner" and a "sub-sea casing" are tubular members which are run on drill pipe. The term "sub-sea casing" is used with respect to offshore drilling operations, while the term "drilling / production liner" is used with respect to both land and offshore drilling operations. For ease of reference in this specification, the present invention is described with respect to a "drilling / production liner." However, it should be appreciated that the present invention may also be used for running a sub-sea casing down a borehole. In the appended claims, the term "tubular member" is intended to embrace either a "drilling / production liner" or a "sub-sea casing." In the specification and appended claims, the term "operatively connected" is used to mean "in direct connection with" or "in connection with via another element," and the term "set" is used to mean "one or more."
[0046] A description of certain embodiments of the present invention is pr...
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