In a broad sense, rigs can be categorized as immobile and mobile. These terms describe the ability of the rig to depart quickly from a drillsite if necessary. This categorization is broad and provides little definition on each rig type. Land and marine classifications provide a more logical grouping for rig types....
CBL/VDL Logging For Good Cement
Cement Evaluation with Ultrasonic and CBL/VDL Combination showing Microcannulas. Figure shows responses from the ultrasonic and CBL Cement bond log /VDL logs run in a well-cemented with a 12 lbm/gal cement. The logs were run at two wellhead pressures: zero and 2000 psi. The cement bond index at these pressures...
Managed Pressure Drilling Definition & Applications 
Managed Pressure Drilling (MPD) is an adaptive drilling process used to precisely control the annular pressure profile throughout the wellbore. The objectives are to ascertain the downhole pressure environment limits and to manage the annular hydraulic pressure profile accordingly. The intention of MPD is to avoid the continuous influx of...
أسئلة وأجوبة في مبادئ التحكم بالآبار Well Control .
١ - أين ولماذا ومتى نركب موانع الإندفاع ؟ تركب موانع الإندفاع في المرحلة الوسطية من حفر الآبار بعد حفر وتغليف وسمنتة المرحلة السطحية والسبب هو أن المراحل الوسطية لايمكن حفرها بدون موانع الاندفاع التي تضمن إغلاق البئر إذاما حدث اندفاع مفاجئ للبئر . 2- مما تتكون موانع الإندفاع ؟...
Well Control
BOP Control System Operational Recommendations A blowout preventer (BOP) is a large, high-pressure safety valve used to prevent the uncontrolled flow of liquids and gases during well drilling operations. Pressure control is a critical part of the drilling process, and, as a fail-safe component, a blowout preventer is essential to...
PDC BIT Performance
WOB / RPM PDC bits tend to drilling with low WOB and high RPM. They are also found to require higher torque than roller cone bits. The general recommendation is that the highest RPM that can be achieved should be used. Although the torque is fairly constant in shale sections...
LWD geoVISION (Logging-While-Drilling geoVISION)
The Logging-While-Drilling-geoVISION (LWD-geoVISION) tool makes later log resistivity measurements. As a formation evaluation tool, its application is limited to conductive muds. It may be run in several configurations and provides up to five resistivity measurements. The geoVISION contains a scintillation gamma-ray detector which supplies a total gamma-ray measurement. An azimuthal...
MUD LOGGING
A mud logging unit is installed on the rig when geologic information must be retrieved on a timely basis. If the formations drilled are not well known or if a specific geologic horizon is targeted, mineralogical data from cuttings brought to the surface with the mud might be essential. For...