Shell Offshore Inc.

John J Pritchard, Jr

Paul L Dodd

A mudline tubing hanger is disclosed in which the tubing hanger is provided as an integral part of the tubing string and is set within the casing by an hydraulic setting mechanism driven through an external control line and actuated by a wireline shifted sleeve. Further manipulation of the sleeve isolates the setting mechanism from the tubing and external control line, establishing a chemical injection conduit with access to the tubing bore through the external control line.

Combination hydraulic tubing hanger and chemical injection sub

An apparatus for taking a sample of formation fluid and obtaining temperature and pressure data when the apparatus is lowered into a well casing or pipe string, said apparatus comprising: a sampling device; a gun perforator; two packers, one positioned above and the other positioned below the sampling device; and valves carried by the sampling device.

Formation fluid sampler

A method and apparatus for abandoning an offshore oil or gas well drilled into the ocean floor having a plurality of concentric strings of pipe having throughbores and spaced to form an annular space between adjacent pipe strings. The invention includes perforating the pipe string with an explosive charge of a size, composition, and velocity so as to only penetrate one pipe string without damaging or penetrating any other pipe string in the well.

Abandoning offshore well

An apparatus for perforating the casing wall of a well and producing the well. The apparatus makes use of a dual flow connector having two downwardly-directed ports and carried by a pipe string which is in fluid communication with the upper end thereof. A gun perforator is removably connected to the connector and depends therefrom for closing one port of the connector while a screen is secured to the connector and depends therefrom for closing the other port of the connector.

Growing community of inventors

Harvey, LA, United States of America

John J Pritchard, Jr