Schlumberger Technology Corporation

Blaine Dow

Zaurayze Tarique

Yawan Couturier

Jesse Alan Hardt

Justin Cremer

Scott Coffey

Walter R Benson

Paul Andrew Thow

Charles H Kamps, Iii

Walter Benson

Charles H Kamps

A method for maintaining a constant bottom hole pressure during wellbore drilling operations, the method comprising supplying drilling fluid to the drill string via a top drive at a first pressure while flow of drilling fluid out of a wellbore annulus is restricted by a choke to hold pressure in a wellbore annulus and supplying drilling fluid to the drill string via the top drive at a second pressure lower than the first pressure and to a circulation coupler at a third pressure while flow of drilling fluid out of a wellbore annulus is restricted by a choke to hold pressure in the annulus, wherein the sum of the second and third pressures is approximately the same as the first pressure. The method also comprises supplying drilling fluid to the drill string via the circulation coupler at the third pressure while pumping drilling fluid into the wellbore annulus by a back pressure pump, wherein the bottom hole pressure at the bottom of the wellbore is maintained substantially constant during all steps of supplying drilling fluid to the drill string.

Non-stop circulation system for maintaining bottom hole pressure

An iron roughneck for constant circulation of drilling mud during operation of a drill string, the iron roughneck comprising: a frame; a wrench unit supported by the frame, wherein the wrench unit is capable of gripping a drill string; a spinner unit supported by the frame, wherein the spinner unit is capable of engaging and spinning a drill pipe; and a circulation coupler supported by the frame, wherein the circulation coupler forms a chamber around the drill string.

Iron roughnecks for non-stop circulation system

A method includes receiving a plurality of signals from a plurality of sensors into a programmable logic controller, the plurality of sensors provided on at least one component of a rotating control device assembly of a drilling system, providing measurement data from the plurality of signals using the programmable logic controller, and processing the measurement data using a modeling software to determine at least one condition of the rotating control device assembly.

Intelligent RCD system

A system includes a mud pump for pumping a drilling mud from a drilling mud source, through a drill string, out a drill bit and into an annular, and a plurality of chokes disposed down stream from the mud pump, including a first choke disposed between the mud pump and the drill string, and a second choke disposed between the mud pump and a mud tank. The system further includes a fluid discharge conduit in fluid communication with the annular space for transferring the drilling mud to handling equipment in fluid communication with the mud tank. The first choke receives the drilling mud from the mud pump at a first flow rate, the first choke reduces drilling mud flow rate to a second flow rate less than the first flow rate, and the second choke reduces drilling mud flow rate to a third flow rate.

Proportional control of rig drilling mud flow

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Sugar Land, TX, United States of America

Blaine Dow