Halliburton Energy Services, Inc.

Boon Buan Lim

Matthew L Lee

Guosheng Jin

Winston Alfred Rodrigues

Nikhil Satyawan Dalvi

A wellbore tractor is provided. The wellbore tractor includes a single hydraulic line and at least one valve disposed along the single hydraulic line. At least two pairs of drives hydraulically coupled with the single hydraulic line such that the single hydraulic line can control the drives to open and/or close. A valve can be disposed along the single hydraulic line between each pair of drives. By controlling the opening and/or closing of each valve, along with controlling the inflow or removal of fluid in the hydraulic line, each pair of drives can be individually controlled to maneuver the wellbore tractor.

Wellbore tractor with independent drives

Apparatus and methods for improved fluid sampling are disclosed. A sampling bottle for collection of a fluid sample comprises concentrically arranged first, second and third sampling containers (A,B,C). First, second and third check valves () regulate flow of the sampling fluid from outside the sampling bottle into the first sampling container, and into the second and third sampling container.

Growing community of inventors

Singapore, Singapore

Boon Buan Lim