Back-Pressure Valve installed in tubing hangers

A back-pressure valve is a type of check valve, typically installed in the tubing hanger, to isolate the production tubing. The back-pressure valve is designed to hold pressure from below yet enable fluids to be pumped from above, as may be required for well-control purposes. Thus, it reduces downtime and operating cost by allowing for repairs without killing the well.

BPV is commonly used during the nipple down and up of the drilling BOP stack, nipple up or down of Christmass trees, test the Christmas tree (2-way check valve), and during the replacement of the master valve.

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Slickline Service Tools – part 1

Slickline operations have been in use since the early days of the oil and gas industry. The development of equipment and technology for slickline operations has kept pace with the development of new methods and tools used in well completion, remedial and work-over operations. Slickline is used for depth determination, deviated hole surveys, temperature and pressure surveys, paraffin cutting, and cementing operations.  Slickline may also be used to set, retrieve, and manipulate chokes, circulating plugs, gage cutters, swaging tools, safety valves and gas-lift valves.

Various tools frequently used in slickline operations are described in this article.

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