Nabors Drilling Technologies Usa, Inc.

Expro Americas, LLC

Power Chokes, Inc.

Danny Spencer

Scott Charles

John McCaskill

Adam Keith

Andre Perales

John McHardy

John Mchardy

John W Mccaskill

John (deceased) Mchardy

A system and method for maintaining fluid pressure within a well bore includes: (a) an axially reciprocable choke; (b) a mud pump; (c) a programmable controller in communication with the choke and providing operational control of the axial reciprocation of the choke to maintain a set point choke pressure; (d) the controller configured to associate a drilling set point choke pressure within the well bore with a drilling pump rate and associate a predetermined connection set point choke pressure within the well bore with a pump rate; and (e) a mud pump monitor configured to communicate with the mud pump and the programmable controller, measure the pump rate of the pump, and communicate the measured pump rate to the programmable controller.

System for controlling wellbore pressure during pump shutdowns

A system and method for conducting subterranean operations. In an embodiment, the system can include a monitoring system configured to monitor at least one criterion of a plurality of operational systems selected from the group of choke valves, mud pumps, drawworks, backpressure pumps, top drive, mud gas separator, flow line, blowout preventer, inside blowout preventer, or any combination thereof, and a logic device configured to generate a capacity value for each operational system of the plurality of the operational systems based on the at least one criterion, and further configured to change a state of one or more of plurality of the operational systems to control a downhole pressure.

System and method of managed pressure drilling

Systems and methods for conducting subterranean operations and managing a bottom hole pressure (BHP) in a wellbore include receiving a first signal at a controller indicating a drill pipe connection or disconnection is beginning and switching the controller from a first control mode to a second control mode. The bottom hole pressure (BHP) in the wellbore is determined, a BHP set point is determined by the controller, and a first pressure set point is sent to a single set point choke (SSPC). The BHP is maintained by comparing the determined BHP to the BHP set point and adjusting the first pressure set point based on the comparison. The controller receives a second signal after the drill pipe connection or disconnection is complete prompting the controller to switch back to the first control mode.

MPD with single set point choke

Growing community of inventors

Houston, TX, United States of America

Danny Spencer