System and method for passing matter in a flow passage

摘要

A system is provided for passing matter in a flow passage of an oil and/or gas drilling or production installation, in particular for passing trash or drill cuttings in a drilling fluid return line. The system includes at least two valves arranged in series in the passage; and a control device configured to selectively or sequentially actuate the at least two valves, such that the material is allowed to pass the at least two valves in the passage. A method is also provided for passing trash or drill cuttings in a drilling fluid return line.

主权项

1. A system for passing matter in a flow passage of an oil and/or gas drilling or production installation, the matter comprising trash or drill cuttings and wherein the flow passage comprises a drilling fluid return line, the system comprising:
first and second valves arranged in series in said flow passage such that flow through the flow passage can be restricted at both the first and second valves; a flow meter placed downstream from the first valve or the second valve; a control device connected to said first and second valves and said flow meter and configured to selectively or sequentially actuate said first and second valves, such that the matter is allowed to pass said valves in the flow passage; and a buffer chamber placed in the flow passage between said first and second valves; wherein the buffer chamber has a cross section in a plane substantially perpendicular to a general flow direction through the flow passage, wherein the cross section is larger than that of portions of the flow passage adjacent to the buffer chamber.