Results 201 to 210 of about 36,919 (267)

Double Zona Drilling for Trophectoderm Biopsy: A Safe Strategy When Inner Cell Mass Herniates. [PDF]

Diagnostics (Basel)
Cheng EH, Lin YP, Lee MS, Lee CY, Lin PY, Huang CC, Lo WC, Chen CI, Chen MJ, Lee CI.   +9 more
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Regulation of Penetration Rate and Drilling Power in Rotary Drilling Systems

2020 IEEE 16th International Workshop on Advanced Motion Control (AMC), 2020
The problems of regulation of penetration rate and drilling power in rotary drilling systems are addressed. Regulation algorithms are proposed which do not require knowledge of majority of the parameters of the drilling systems and those of the rock-bit interaction.
Maksim V. Faronov, Ilia G. Polushin
openaire   +1 more source

Effect of drilled solids on drilling rate and performance

Journal of Petroleum Science and Engineering, 2007
Abstract This paper describes the results of laboratory investigations into the effect of drilled solids on the drilling rate and drilling performance. Drilling fluid performance and a successful result during drilling operations are characterised by the fluid's properties providing hole cleaning and cutting transport.
Derrick O. Njobuenwu, Chimeka A. Wobo
openaire   +1 more source

Hydraulic Optimization of Foam Drilling For Maximum Drilling Rate

Proceedings of SPE/IADC Underbalanced Technology Conference and Exhibition, 2004
ABSTRACT The theory of hydraulic optimization of drilling with conventional (incompressible) drilling fluids is well known and has been widely practiced in the industry. Classical theory of hydraulics optimization for maximum drilling rate calls for either the use of empirical correlations or the use of optimization theory
E. Kuru, O. M. Okunsebor, Y. Li
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Drilling Salt - Effect of Drilling Fluid on Penetration Rate and Hole Size

Proceedings of IADC/SPE Drilling Conference, 2002
Abstract Drilling a deep, high-pressure sub-salt well is both expensive and a mechanical challenge. There are a number of issues that create difficulty. Drilling fluid selection in the past has focused on drilling a gauge hole, with little concern on the issue of penetration rates.(rate-of-penetration.) Drilling a gauge hole is still an ...
Donald Whitfill, Greg Rachal, Jim Lawson, Ken Armagost   +3 more
openaire   +1 more source

Hydraulic Optimization of Aerated Mud Drilling for Maximum Drilling Rate

IADC/SPE Managed Pressure Drilling and Underbalanced Operations Conference & Exhibition, 2009
Abstract The theory of hydraulic optimization of drilling with conventional (incompressible) drilling fluids is well known and has been widely practiced in the industry. Classical theory of hydraulic optimization for maximum drilling rate calls for either the use of empirical correlations, such as Fullerton charts, Amoco curves, etc., or
H. Andersen, A. Vigrestad, E. Kuru
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Laboratory Drilling Rate and Filtration Studies Of Emulsion Drilling Fluids

Journal of Petroleum Technology, 1967
Abstract Data obtained under controlled lest conditions using a microbit drilling machine showed that oil emulsified in water muds may either increase or decrease the drilling rate, depending upon drilling conditions.
Charles P. Lawhon, William M. Evans, Jay P. Simpson   +2 more
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Optimization of Drilling Fluid Flow Rates – A Study of the Drilling Fluid Flow rates and Annular Pressure in Horizontal Directional Drilling

2023
Trenchless technologies have experienced the fast development and dramatic change in the past three decades. Derived from oil and gas industry, Horizontal Directional Drilling (HDD) is considered as one of the most rapidly expanded trenchless technologies and widely used in infrastructure construction and pipeline installation, minimizing the social ...
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Drilling Variables At Technical Limit Of Drilling Rate

Canadian International Petroleum Conference, 2002
Abstract Recorded drilling times may show significant variations from well to well even for the same total depth in the same field. Apart from the formation characteristics, engineers' technical ability plays an important role in determining drilling time. A drilling performance is usually compared
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Drilling into fracking spill rates

C&EN Global Enterprise, 2017
Spills associated with unconventional oil and gas production processes, which include hydraulic fracturing, or fracking, numbered in the thousands between 2005 and 2014, according to a recent report. Lauren A. Patterson of Duke University and her colleagues analyzed spill data from more than 30,000 unconventional oil and gas wells in Colorado, New ...
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