Schlumberger Technology Corporation

National Oilwell Varco, L.p.

Darrin Lynn Yenzer

Matthew David Givens

Christopher Nault

Ray Cummins

Lawrence Edward Wells

Preston R Fox

Lawrence E Wells

Blowout preventers having bodies with internal choke and kill line pass-through conduits are provided. In one embodiment, a blowout preventer body () includes a drill-through bore () extending through the blowout preventer body and a ram cavity () transverse to the drill-through bore. The blowout preventer body can also include choke and kill line conduits () extending through the blowout preventer body, as well as choke and kill line access branch conduits () extending between the choke and kill line conduits and the drill-through bore. Additional systems, devices, and methods are also disclosed.

Blowout preventer with choke and kill line pass through conduits

Blowout preventers having bodies without flanged necks are provided. In one embodiment, a blowout preventer stack includes first and second blowout preventers having independent and separable main bodies, each including a bore and a ram cavity transverse to the bore. The lower end of the main body of the first blowout preventer is fastened directly to an upper end of the main body of the second blowout preventer without a flanged neck extending the bore between the ram cavities of the first and second blowout preventers. In some instances, the main bodies of the first and second blowout preventers include external connection flanges that extend laterally from ram cavity body portions of the main bodies so as to enable connection of the two main bodies along the sides of the main bodies away from their bores. Additional systems, devices, and methods are also disclosed.

Blowout preventer with wide flange body

A top drive system for wellbore drilling operations, the top drive system including a main shaft having an upper shaft seal system with a raised platform for supporting the seal system. The top drive may also have a shroud for covering the seal(s), and contaminants may flow down from the seals, since the seals are raised by the platform.

Top drive with shaft seal isolation

Growing community of inventors

Cypress, TX, United States of America

Darrin Lynn Yenzer