Results 121 to 130 of about 1,256 (185)
Wear characteristics of zirconia-toughened epoxy/Kevlar-honeycomb composite lining for drilling casing. [PDF]
HeliyonFouad Y +8 more
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Effect of tripping velocity profiles on wellbore pressures and dynamic loading of drillstring
Tyt. z nagłówka.Pozostali autorzy artykułu: Stefan Miska, Mengjiao Yu, Nicholas Takach.Bibliogr. s. 285-[286].Tripping events are expensive and time-consuming.
core
Saudi calcium bentonite: a novel modifier for enhanced foamed underbalanced drilling performance.
Sci RepGowida A, Elkatatny S.
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Push-and-twist drillstring assemblies
Deep drilling using a rigid drillstring requires the assembly and disassembly of multiple drill pipes. The interfaces between these pipes provide a challenge for automation because they must transmit large drilling forces and movements while, at the same
Timoney, Ryan +5 more
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A review of vibration analysis and its applications. [PDF]
HeliyonChu T, Nguyen T, Yoo H, Wang J.
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Drillstring Identification to Reduce Drillstring Failures
IADC/SPE Drilling Conference, 1988Abstract A novel system has been developed, which reduces the number of drillstring failures by enabling the accumulated fatigue load of each individual drillstring component to be recorded. A prototype is currently undergoing field tests. Labels incorporated in drillpipes are used to identify the components.
G.D. Twilhaar, J.H.L. Esch
openaire +1 more source
24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B, 2005
In this paper we show how a drillstring can be modeled in terms of limited numbers of masses and springs for the purpose of building a test rig. The model should represent the drillstring dynamics to a reasonable degree of accuracy. We will use the real component of the Frequency Response Function and the stability diagram as measures of dynamic ...
M. A. Elsayed, Chin Chin Phung
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In this paper we show how a drillstring can be modeled in terms of limited numbers of masses and springs for the purpose of building a test rig. The model should represent the drillstring dynamics to a reasonable degree of accuracy. We will use the real component of the Frequency Response Function and the stability diagram as measures of dynamic ...
M. A. Elsayed, Chin Chin Phung
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Drillstring-borehole interaction: backward whirl instabilities and axial loading [PDF]
Meccanica, 2017 A major concern within the oil drilling industry remains the interaction between the drillstring and borehole. The interaction between the drillstring and borehole wall involves nonlinearities in the form of friction and contact. The drillstring borehole
Kiran Vijayan, M I Friswell
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Analysis of Drillstring Failures
SPE/IADC Drilling Conference, 1995Abstract The drilling industry is currently exploring various ways of reducing drilling costs through a multitude of initiatives; for example C.R.I.N.E. (Cost Reduction In the New Era). One of the major areas where there is potential for cost reduction is downtime due to hole problems and drillstring failures.
David David, Hussain Hussain
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Failure analysis of drillstrings
Engineering Failure Analysis, 2007Abstract The cost of drilling a well is measured in tens of millions of dollars. The incidence of downhole failure of the drillstring can increase this figure dramatically. The focus placed on cost reduction in the early 1990’s – when the oil price was much lower than today’s levels – resulted in some scrutiny of drilling operations, amongst other ...
K.A. Macdonald, J.V. Bjune
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