Effect of Tool Joints on Contact Force and Axial Force Transfer in Horizontal Wellbores

2001 ◽  
Author(s):  
O.B. Duman ◽  
S. Miska ◽  
E. Kuru
Keyword(s):  
Contact Force ◽  
Axial Force ◽  
Force Transfer ◽  
Horizontal Wellbores

The Buckling Behavior of Pipes and Its Influence on the Axial Force Transfer in Directional Wells

2000 ◽  
Vol 122 (3) ◽  
pp. 129-135 ◽  
Author(s):  
Ergun Kuru ◽  
Alexander Martinez ◽  
Stefan Miska ◽  
Weiyong Qiu
Keyword(s):  
Internal Pressure ◽  
Axial Force ◽  
Current Theory ◽  
Pipe Diameter ◽  
Computer Simulator ◽  
Buckling Behavior ◽  
Force Transfer ◽  
Post Buckling ◽  
Support Conditions ◽  
The University

An experimental setup was built at the University of Tulsa to study buckling and post-buckling behavior of pipes constrained in straight horizontal and curved wellbores. Experiments were conducted to investigate the axial force transfer with and without static internal pressure. Different stages of buckling phenomena and their relation to the axial force, the pipe diameter (1/4 and 3/8 in.) and the pipe end-support conditions have also been investigated. Experimental results have shown that the buckling load is a strong function of the pipe diameter and the pipe end-support conditions. Static internal pressure appears to have insignificant influence on the buckling behavior of pipes. A brief review of recently developed mathematical models to predict buckling behavior of pipes in inclined, curved, and horizontal sections of wellbore is also presented. Applications of the current theory are presented by using recently developed computer simulator. Results of the theoretical analysis have confirmed the versatility and effectiveness of computer simulator for better understanding and solving buckling related problems in the field. [S0195-0738(00)00903-1]

The Effect of Hydraulic Vibrations on Initiation of Buckling and Axial Force Transfer for Helically Buckled Pipes at Simulated Horizontal Wellbore Conditions

2007 ◽  
Author(s):  
Elie R. Barakat ◽  
Stefan Z. Miska ◽  
Mengjiao Yu ◽  
Petru-Aurelian Simionescu ◽  
Nicholas E. Takach
Keyword(s):  
Axial Force ◽  
Force Transfer ◽  
Horizontal Wellbore

Wall Contact Forces on Helically Buckled Tubulars in Inclined Wells

1990 ◽  
Vol 112 (2) ◽  
pp. 142-144 ◽  
Author(s):  
Y. C. Chen ◽  
J. B. Cheatham
Keyword(s):  
Contact Force ◽  
Axial Force ◽  
Contact Forces ◽  
Friction Modeling ◽  
Helix Pitch ◽  
Frictional Forces

Wall forces on helically buckled pipe can cause large frictional forces that may prevent movement of the pipe in steeply inclined holes. A method of analyzing the dependency of the wall contact force on axial force and hole inclination is presented. The concept of an apparent wall force is introduced to explain phenomena associated with helix pitch variations during axial force unloading in inclined wells. Results of this analysis can have applications in friction modeling of buckled pipe in inclined holes.

Effect of Nano-Clays on the Lubricity of Drilling Fluids

2016 ◽  
Author(s):  
Jamil Abdo ◽  
Hamed Al-Sharji
Keyword(s):  
Electrical Properties ◽  
Rheological Properties ◽  
Axial Force ◽  
Drilling Fluids ◽  
Structure And Morphology ◽  
Mechanical And Electrical Properties ◽  
Force Transfer ◽  
Water Based ◽  
The Stability

In this study, nano-sepiolite (NSP) was synthesized, dispersed and used as a replacement for regular additives in water-based drilling fluids to enhance its lubricity. Due to its structure and morphology the suspended sepiolite nanoparticles is expected to enhance the stability against segmentation along with better thermal, mechanical and electrical properties. The morphology of the nano-modified drilling fluids and the dispersion of the nano-sepiolite are characterized using XRD and SEM. The influences of various sizes and compositions of the NSP on the stability of drilling fluids on HTHP conditions are investigated. Results revealed that the drilling fluids lubricity and the drillstring axial force transfer were significantly improved by using NSP in the base drilling fluids. The investigations showed that the lubricity and rheological properties of the nano-modified drilling fluids depend on the size and composition of the NSP additive. The studies were performed on normal and HTHP conditions.

scholarly journals A STUDY ON DEVELOPMENT OF VISCO-ELASTIC DAMPER SYSTEM INCLUDING AXIAL FORCE TRANSFER MECHANISM METHOD

2011 ◽  
Vol 17 (37) ◽  
pp. 915-920
Author(s):  
Tadamichi YAMASHITA ◽  
Jun KAWABATA ◽  
Masayuki NINOMIYA ◽  
Tetsushi INUBUSHI ◽  
Kazuhiro TANAKA ◽  
...  
Keyword(s):  
Axial Force ◽  
Transfer Mechanism ◽  
Force Transfer ◽  
Force Transfer Mechanism
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