Testing Protocol And Breakeven Cost Analysis of Mud Dewatering For Closed-loop Drilling System

1997 ◽  
Vol 36 (03) ◽  
Author(s):  
A.K. Wojtanowicz
Keyword(s):  
Cost Analysis ◽  
Closed Loop ◽  
Testing Protocol ◽  
Drilling System

Advanced Tools for Advanced Wells: Rotary Closed Loop Drilling System - Results of Prototype Field Testing

1998 ◽  
Vol 13 (02) ◽  
pp. 67-72 ◽  
Author(s):  
Sandro Poli ◽  
Franco Donati ◽  
Joachim Oppelt ◽  
Detlef Ragnitz
Keyword(s):  
Closed Loop ◽  
Field Testing ◽  
Drilling System

Downhole Drilling Mechanics Analysis Based on Closed-Loop Rotary Steerable Drilling System

2014 ◽  
Vol 919-921 ◽  
pp. 1290-1294
Author(s):  
Yue Xin Yang ◽  
Yun Pu Du ◽  
Ren Sheng Wang
Keyword(s):  
Closed Loop ◽  
Moment Equation ◽  
Continuous Beam ◽  
Deviation Angle ◽  
Inclined Plane ◽  
Drilling Tool ◽  
Mechanics Analysis ◽  
Drilling System ◽  
The Relationship ◽  
Drill Collar

Design of closed loop drilling tool in the rotary steering drilling system is a bit in recent installation guide controlled stabilizer, and placed on the upper drill collar two downhole assembly form of stabilizer. The set of parameters for the MATLAB software programming is used to solve the three moment equation and the downhole assembly mechanical properties. With continuous beam column theory, the mechanics features of the BHA are analyzed. It is analyzed focused on the relationship between the guiding force and the bit deflecting force, the relationship between the hole deviation angle and bit deflecting force, the relationship between the drill press and bit deflecting force, the relationship between the guiding force position on the well inclined plane and bit deflecting force through the tables and figures based on closed-loop rotary steerable drilling system.

Modal Cost Analysis for Linear Matrix-Second-Order Systems

1980 ◽  
Vol 102 (3) ◽  
pp. 151-158 ◽  
Author(s):  
R. E. Skelton ◽  
P. C. Hughes
Keyword(s):  
Cost Analysis ◽  
Attitude Control ◽  
Closed Loop ◽  
Vibration Suppression ◽  
Performance Criterion ◽  
Second Order ◽  
Linear Matrix ◽  
Early Model ◽  
Second Order Systems ◽  
Mode Truncation

Reduced models and reduced controllers for systems governed by matrix-second-order differential equations are obtained by retaining those modes which make the largest contributions to quadratic control objectives. Such contributions, expressed in terms of modal data, are called “modal costs” and when used as mode truncation criteria, allow the statement of the specific control objectives to influence the early model reduction from very high order models which are available, for example, from finite element methods. The relative importance of damping, frequency and eigenvector in the mode truncation decisions are made explicit for each of these control objectives: attitude control, vibration suppression and figure control. The paper also shows that using Modal Cost Analysis (MCA) on the closed loop modes of the optimally controlled system allows the construction of reduced control policies which feedback only those closed loop modal coordinates which are most critical to the quadratic control performance criterion. In this way, the modes which should be controlled (and hence the modes which must be observable by choice of measurements), are deduced from truncations of the optimal controller.

Intestinal Bacteriology of Closed Loop, Strangulated Obstruction in Dogs.

1961 ◽  
Vol 41 (3) ◽  
pp. 245-250 ◽  
Author(s):  
George H. Bornside ◽  
Isidore Cohn
Keyword(s):  
Closed Loop
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