الصفحات

Tuesday, March 13, 2012

Water base mud

Water base mud Consists of: 1-Liquid water, continuous phase 2-Reactive solids, for viscosity and yield point 3-Inert solids, for density 4- Chemical additives, to control properties Hydration of clays •Clays with high cation exchange capacity exchange large amount of water into the exchangeable layer and adsorb water onto the outer surface of plates •This effect gives high viscosity and high yield point...
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Monday, March 12, 2012

Drilling Fluids Functions

–They     1-Cool the drill bit and lubricate its teeth 2-Lubricate and cool drill string 3-Control formation the pressure 4-Carry cutting to the surface 5-Stabilize the well bore 6-Help in the well logs 7-limitting corrosion 1-Cool bit and lubricate its teeth    •Drilling action requires mechanical...
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Thursday, March 8, 2012

Perforation (6)(SAFETY PROCEDURES)

2.7. GENERAL SAFETY PROCEDURES The following comments are applicable to both TCP and wireline conveyed methods. Additional comments are given in section specific to wireline conveyed perforating.   a) All perforating operations, since they involve the handling and use of explosives and possibly radioactive materials, require special safety procedures to be strictly observed at all times. b) Perforating operations...
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perforation (5)(WIRELINE DEPTH CONTROL)

WIRELINE DEPTH CONTROL Depth control for perforating is almost universally obtained through radioactivity instruments run in the cased hole in conjunction with the Casing Collar Locator (CCL). The Gamma Ray Log is generally used (Figure B28) though, in some cases, the Neutron Log or both Gamma Ray and Neutron are run. Accurate correlation...
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Perforation (3) (Explosives Classifications)

Explosives Classifications Explosives were invented first by the Chinese in the 10th century, then independently by the Arabs in the 13th century. The low explosive, or black powder, was characterized by slow reaction rates, 500 to 1500 m/sec, and relatively low combustion pressure. Much later, in 1846, the first high explosive was...
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