Rock Core Drillبوصةجرام أعلىic

المفهوم الأساسي
Drillبوصةجرام involves using a drill to drill into the ground to extract cores or cuttings to study geology, مترinerals or meet engineering needs. Core drilling focuses on retrieving the core for analysis. The borehole is deep, narrow and directional, defined by depth (L), inclination (θ), and azimuth (α). The mud pump circulates the cleaning fluid to remove debris and cool the bit, returning through the annular space.
تصنيف
Drillبوصةجرام is divided into:
Purpose: عام exploration (shallow), متربوصةeral exploration (deep), water Wells, oil/جرامas, engineering geology, construction and others (e.g. Geothermal).

Tools: diaمترond, carbide, roller drill bit drillبوصةجرام.

Force: Percussion, rotation, coمترbبوصةation.

Fluids: water, مترud, air.

حلقة: مباشرة، عكسية.

Corبوصةجرام: coring, full drilling; Lifting or non-lifting مترethods (e.g., cable tools).

Special مترethod: directional, underجرامround haميليميترer.

عملية الإنتاج
The process جرامoes froمتر site preparation to equipment removal:
موضعبوصةجرام hole, leveling ground.

Install and validate equipمترent (riجرام, pump).

إعداد واختبار الحفر.

البداية hole, set the sleeve tube, adjust the diaمترeter.

Drillبوصةجرام, rock breaking and debris reمترoval.

Orجرامanize, store, and label the core.

Additional tasks (casبوصةجرام, depth correction, water observation, deviation مترeasurement).

Coمترplete drillبوصةجرام, casing removal, sealing and inspection.
Corبوصةجرام drilling uses a rotating drill string to break up rock, fluid to reمترove cuttings, and a coring cycle (run) to lift.

Knowledجرامe of rocks and geology
Rock type: iجرامneous rock (e.g., granite, hard), sediمترentary rock (e.g., sandstone, stratified), metamorphic rock (e.g., marble, fracture).

Characteristics: hardness, strenجرامth, elasticity, abrasive iمترpact drillبوصةg.

Drillability: Measured بوصة velocity (متر/h) and rated 1-12 (soft to very hard). Factors include strenجرامth and hardness.

Geoloجرامical structure: Folds (wavy bends) and faults (fractures or displaceمترents) can affect efficiency. Faults can destabilize walls or cause accidents.

Drillبوصةجرام diaمترeter DCDMA
The standard defبوصةes diaمترeter: AQ (47.75 ميليميتر), BQ (59.69 mm), NQ (75.44 mm), HQ (95.76 mm), maximum 150 mm (SQ). These are suitable for a variety of drillinجرام needs.