Introduction to Domestic Oil Casing Production Lines In recent years, China's oil casing processing technology has continuously improved. The export volume of oil casings has also increased significantly, with many domestic manufacturers enhancing their production capabilities for oil casings. Through investigations and research on China's oil casing processing enterprises, it has been found that the
Common Drill Collar Data and Drill Pressure Calculation Drill collar data are critical parameters in drilling operations that help engineers conduct safe and efficient drilling. Common drill collar data include drill collar diameter, bit speed, drill pressure, rotational speed, etc. Drill Collar Diameter: The drill collar diameter refers to the outer dimension of the drill
How to Use Double Stabilizers The primary effect of double stabilizers lies in stabilizing the azimuth. In practice, we have found that in most cases, double stabilizers serve to stabilize or slightly increase the azimuth. Some drill string configurations can even result in significant increases in azimuth if used appropriately, without leading to a decrease
Conventional Drilling Straight Well Drill String Combinations: BIT: Drill Bit DC: Drill Collar SDC: Helical Drill Collar LZ: Motor Drill String SJ: Bi-directional Shock Absorber DP: Drill Pipe HWOP: Heavyweight Drill Pipe STB or LF: Stabilizer (Drill String) LB: Fishing Basket While Drilling DJ: Jar Tower-type Drill String Combinations: Φ444.5mm BIT × 0.50m + Φ229mm
1. Well: A cylindrical hole drilled into the formation to a certain depth for the purpose of exploring and developing oil and natural gas. 2. Wellhead: The opening end of the well. 3. Well bottom: The lowermost end of the well. 4. Open hole: The section of the well that has not been cased. 5.
Common Drill Collar and Tubular Displacement Volumes Displacement volumes per joint of commonly used drill collars and tubulars: 9" drill collar volume per joint = 0.98 m³ 8" drill collar volume per joint = 0.77 m³ 7" drill collar volume per joint = 0.56 m³ 6-1/4" drill collar volume per joint = 0.43 m³ 6-3/4"
Casing and Tubing Steel Grade Color Codes Color codes for steel grades are used to identify different types of casing and tubing based on their strength and threading. Below is the translation of the color coding system for oilfield tubular goods: Steel Grade Color Coding Steel Grade Tubing and Coupling Connection H40 Manufacturer's choice of
Casing Steel Grades There are twenty different steel grades for oil and casing pipes, namely H40, J55, K55, M65, N80, L80, C90, T95, C95, P110, Q125. Different color codes and symbols are used to distinguish various steel grades and thread types of the oil and casing pipes. The two or three digits following the color
Matching of Casing Sizes with Bit Sizes API Bit Standard Sizes in (mm) in (mm) in (mm) in (mm) in (mm) 3 3/4 (95.2) 5 5/8 (142.9) 7 7/8 (200.0) 9 1/2 (241.3) 17 1/2 (444.5) 4 1/8 (104.8) 5 7/8 (149.2) 8 3/8 (212.7) 9 7/8 (250.8) 20 (508.0) 4 3/4 (120.6) 6 (152.4)
Explanation of Casing Connections in Petroleum Industry Connections are one of the most common parts in tools and also one of the hardest to distinguish. Understanding connections is crucial for tool technicians or supervisors. Without knowledge of connections, procuring materials, preparing for operations, and directing work would be impossible and could lead to significant issues.