Weatherford/lamb, Inc.

Kvaerner Oilfield Products, Inc.

Kugerner Oilfield Products, Inc.

Ralph Anthony Alvarez

Michael John Miller

Mark Christopher Glaser

Jack Allen

Gerald M Ferguson

A method and apparatus for drilling and completing multiple wellbores from a single drilling rig and from within a single wellhead is provided. In one embodiment, a template is disposed at a predetermined location downhole within a casing. In one aspect, a first casing string is lowered with the template to the predetermined location and disposed within a first wellbore. A second wellbore may be drilled through a bore in the template. A second casing string may then be lowered through the bore into the second wellbore. In another embodiment, at least two wellbores are drilled and completed from a surface casing having a crossover portion.

Method of drilling and completing multiple wellbores inside a single caisson

The invention is an adjustable tubing hanger for suspending a tubular string from a wellhead. The adjustable tubing hanger has an upper body having a seal, a lower body attached to the upper body and the tubular string, a carrier assembly located between the upper body and the lower body providing at least one metal seal for an annulus, and a drive lock assembly attached to the lower body with a tension lock and numerous segments. Each segment has an outer diameter with a grooved profile forming a load bearing interlock for the drive lock assembly. The tension on the tubular string is adjustable depending on adjustments made to the interlock position of the grooved profile.

Adjustable tubing hanger assembly

A subsea wellhead with a tension latching system for a casing hanger or a tubing hanger, a tension latching system for hangers, and a method for adjusting the tension on a casing hanger or tubing hanger for subsea wells.

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Houston, TX, United States of America

Ralph Anthony Alvarez