Patent
Magnetorheological fluid apparatus, especially adapted for use in a steerable drill string, and a method of using same
Reads0
Chats0
TLDR
A rotatable steerable drill string in which guidance module controls the direction of the drilling is described in this article.The magnetic field is applied to the magnetorheological fluid to increase or decrease its fluid shear strength.Abstract:
A rotatable steerable drill string in which guidance module controls the direction of the drilling. A magnetorheological fluid in the module supplies pressure to pistons that apply forces to the wall of the bore and thereby alter the direction of the drilling. The pressure applied by the magnetorheological fluid is regulated by valves that apply a magnetic field to the fluid so as to increase or decrease its fluid shear strength thereby controlling the actuation of the pistons and the direction of the drilling.read more
Citations
More filters
Patent
Fail safe surface controlled subsurface safety valve for use in a well
TL;DR: The surface controlled subsurface safety valve (SCSSV) as mentioned in this paper is a valve body having a longitudinal bore for fluid to flow through, a bore closure assembly, a pressure balanced drive assembly, and a fail safe assembly.
Patent
Downhole actuation system utilizing electroactive fluids
TL;DR: In this paper, an expandable volume fluid is used against a slip actuating element in the same manner as a fluid pressure motor, and the fluid expands to volumetrically expand.
Patent
Method, system and tool for reservoir evaluation and well testing during drilling operations
Stephen Rester,James L. Hunt,Tim Wiemers,Edgar Chacon,John J Baldauff,Michael H Johnson,Rob L Allen +6 more
TL;DR: In this article, a method, system and tool for performing formation and well evaluation while drilling are disclosed, which determine the properties of a particular formation (F) within a reservoir as the reservoir is being intersected during well construction.
Patent
System and method for surface steerable drilling
Todd W. Benson,Teddy C. Chen +1 more
TL;DR: In this paper, a system and method for surface steerable drilling is presented, which includes monitoring operating parameters for drilling rig equipment and bottom hole assembly (BHA) equipment for a BHA.
Patent
Control method for downhole steering tool
Emilio A. Baron,Stephen Jones +1 more
TL;DR: In this article, a method for determining a rate of change of longitudinal direction of a subterranean borehole is provided, which includes positioning a downhole tool in a borehole, the tool including first and second surveying devices disposed thereon.
References
More filters
Journal ArticleDOI
Properties and applications of commercial magnetorheological fluids
TL;DR: In this article, the rheological and magnetic properties of several commercial magnetorheological (MR) fluids are discussed and compared using appropriate figures of merit based on conventional design paradigms.
Journal ArticleDOI
Commercial magneto-rheological fluid devices
TL;DR: Controllable magnetorheological (MR) fluid devices have reached the stage where they are in commercial production as discussed by the authors, and such devices are finding application in a variety of real world situations ranging...
Patent
Steerable rotary drilling system
TL;DR: A steerable rotary drilling system has a bottom hole assembly which includes, in addition to the drill bit, a modulated bias unit and a control unit, the bias unit comprising a number of hydraulic actuators around the periphery of the unit, each having a movable thrust member which is hydraulically displaceable outwardly for engagement with the formation of the borehole being drilled.
Patent
Closed loop drilling system
TL;DR: In this paper, a closed-loop drilling system for drilling oilfield boreholes is described, which includes a drilling assembly with a drill bit, a plurality of sensors for providing signals relating to parameters relating to the driling assembly, borehole, and formations around the drilling assembly.
Patent
Magnetorheological fluid devices
TL;DR: In this article, a magnetic valve is utilized to change the flow parameters of the MR fluid and, hence, the operational characteristics of the damper, and several improved piston designs, including spool and toroidal configurations, are disclosed.