Flow reversing apparatus and methods of use

Details Flow reversing apparatus and methods of use Flow reversing apparatus and methods of use

2005-06-13

2009-11-10

Thompson, Kenneth (Department: 3672)

Wells

Valves, closures or changeable restrictors

Fluid operated

C166S332800, C166S374000, C166S250030, C251S298000

Reexamination Certificate

active

07614452

ABSTRACT:
Apparatus and methods for selectively and safely reversing flow in coiled tubing used for wellbore cleanouts are disclosed. One apparatus includes a section of coiled tubing having a main flow channel, at least two flow-preventing valves in the section of coiled tubing, each adapted to close the main flow channel upon attempted flow reversal; and at least one actuator adapted to deter closing of the flow-preventing valves. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

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