National Oilwell Varco, L.p.

Russell Gilleylen

Frank Benjamin Springett

Andrei M Muradov

Deepthi Raj Setlur

Haresh Ghansyam

Alan H Kitching

Tony Pink

Lance Staudacher

Murray Gilbertson

Steven D Laughlin

Robert G Rector

Nooreldin Moussa

Darren Mourre

Shiran Waas

James R Streater

Deepthi Setlur

Haresh C Ghansyam

Jr Streater James R

An insulated drill pipe joint for a drill string of a well system includes an outer sub defining a central passage extending between a first end of the outer sub and a longitudinally opposed second end of the outer sub, wherein the outer sub includes a first connector located at the first end and a second connector located at the second end, an inner mandrel slidably received in the central passage of the outer sub and defining a central passage extending between a first end of the inner mandrel and a longitudinally opposed second end of the inner mandrel, wherein an annular insulation compartment is formed that at least partially surrounds the inner mandrel and which is sealed from the central passage of the inner mandrel, and an insulation medium located in the insulation compartment and has a greater thermal resistance than the outer sub.

Insulated drilling systems and associated methods

Growing community of inventors

Spring, TX, United States of America

Russell Gilleylen