China API Standard Oil Casing Pipe for Oilfield Well

API Standard Oil Casing Pipe for Oilfield Well
1. Introduction
As one of the major structural component of a well, casing pipe is set inside the drilled well to protect and support well stream from outside contaminants, as well as any fresh water reservoirs from oil or gas.
The cost of casing is a major part of the overall cost of a well, so the selection of casing size, grade, connectors, and setting depth is a primary engineering and economic consideration.
2. Usage of casing
1) Maintain the stability of borehole;
2) Prevent the contamination of water sands;
3) Isolate water from producing formations;
4) Control well pressures during drilling, production and workover operations.
3. Parameters

Outer DiameterWall ThicknessGradeThreadLength inmmkg/mlb/ft 4 1/2"114.314.14-22.479.50-15.10J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 5"12717.11-35.8611.50-24.10J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 5 1/2"139.720.83-34.2314.00-23.00J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 6 5/8"168.2829.76-35.7220.00-24.00J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 7"177.825.30-56.5517.00-38.00J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 7 5/8"193.6835.72-63.6924.00-42.80J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 8 5/8"219.0835.72-72.9224.00-49.00J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 9 5/8"244.4848.07-86.9132.30-58.40J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 10 3/4"273.0548.73-97.7732.75-65.70J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 11 3/4"298.4562.50-89.2942.00-60.00J55/N80/P110/K55LTC/STC/BTCR1/R2/R3 13 3/8"339.7271.43-107.1548.00-72.00J55/N80/P110/K55LTC/STC/BTCR1/

Our team
Zhengzhou Maierda Petroleum Equipment Co., Ltd., located in Central China, is a professional supplier of oilfield equipment and tools.
Our factories has more than 15 years experiences of manufacturing oilfield equipment and tools.
Our sales team has more than 10 years importing exporting experiences in oil & gas industry.
Our products
We are specialized in such as casing centralizers, float collars and float shoes, cementing plugs, cement baskets, cementing heads, stage collars, sucker rods, drill pipes, drill collars and pumping units
our products are well sold in Mideast, North America, Latin America, Central Asia, Southeast Asia, Russia, North Africa, etc.
We are committed to providing high-quality and cost-effective products and services to our customers.
Our services
We guarantee and uphold the highest standards in customer service, client satisfaction, and quality product delivery in the oilfield industry. We are professional in many kinds of casing centralizers, float collars and float shoes, cementing plugs, cement baskets, cementing heads, stage collar, sucker rods, drill pipes, dill collars, etc.
Let's join hands and work together to create a better future!