What are Oil Country Tubular Goods (OCTG)?
What is OCTG in oil & gas?
OCTG refers to the piping products. The full name of OCTG is Oil Country Tubular Goods. OCTG is a special pipe that applied in the oil and gas production (drilling activities). It refers to a type of steel pipe specially used in oil and gas extraction. Most of OCTG are seamless pipes, but welded pipes also account for a certain proportion.
The term Oil Country Tubular Goods describes the tubing used in oil and gas production. They are typically drill pipe, casing and tubing. Oil Country Tubular Goods are used both onshore and offshore. They are also known in the industry by the acronym OCTG (for "Oil Country Tubular Goods").
What is OCTG used for?
Tubing and casing are the structural walls or linings of oil/gas wells. Oil casing prevents contamination of the oil well or the surrounding groundwater. The maximum diameter of oil casing can reach 36 inches.
OCTG is the acronym for Oil Country Tubular Goods. OCTG is tube and pipe which is used in the production of oil and gas. This pipe is used both onshore and offshore for the production of oil and gas.
Who is the manufacturer of OCTG pipe?
Oil country tubular goods (OCTG) manufactured by Sino Mechanical are widely used across the global oil and gas industry. Sino Mechanical is the OCTG company. Today, just as in the past, we are dedicated to serving our energy customers through an array of casing and tubing products designed to meet a new generation of challenges.
Top 10 Leading Oil Country Tubular Goods Companies and Manufacturers in the World are TMK, Tenaris, U.S. Steel Corporation, JFE Steel Corporation, NOV, ILJIN Steel Corporation, Vallourec, Sumitomo Corporation, ArcelorMittal and EVRAZ North America.
What is the range of OCTG pipe?
The diameters of OCTG casing pipe range from 4.5″ to 36″. The well-cemented pipe acts as the structural component of the well and offer hole integrity. They prevent the well from collapsing when the drilling process is on.
What are the sizes of OCTG?
Available Sizes: 4 1/2″, 5 1/2″, 7″, 7 5/8″, 8 5/8″, 9 5/8″, 10 3/4″, 13 3/8″ OD. Specialties: Threading. Heat treating.
What is the difference between OCTG and line pipe?
The pipe is laid in a horizontal direction, a key difference between linepipe and OCTG material. Seamless pipes are generally more expensive and cannot be produced in large diameters. Therefore, the majority of linepipe on the market is welded.
What are the grades of OCTG?
Steel Casing pipe standards usually referred to API 5CT, Common Grades in J55/K55, N80, L80, C90, T95, P110 etc. Common length in R3 which nominal at 40 ft / 12 meters.
What are the 3 grades of steel pipe?
Three grades of ASTM A106 are available—Grades A, B, and C, in order of increasing tensile strength. Table 3.2 provides the specifications for a given temperature range. For years, most pipes were made from Grade B steel, which has a minimum yield strength of 35,000 psi.
OCTG includes Tubing, Casing, Drill Pipe, Line Pipe, Drill Collar, Coupling, Pup Joint
(OCTG) Oil Specific Tubing is a series of seamless rolled tubing consisting of drill pipe, casing and tubing.
1. Tubing
Tubing is the pipeline that transports oil or natural gas from a wellbore. The length of the tubing section is usually about 9 meters, with a threaded connection at each end.
2. Casing
The borehole is lined with casing, which bears the axial tension brought by its own weight, the internal pressure generated by fluid erosion and the external pressure of the surrounding rock. The casing is especially subjected to axial tension and internal pressure from the pumped oil or emulsion.
3. Drill Pipe
Drill pipe is a large seamless tube. The drill pipe drives the drill bit to rotate and circulate the drilling fluid. The 9-meter drill pipe sections are joined by tool joints. The drill pipe is also subjected to the high torque of the drilling process. The self-weight of the drill pipe can bring axial tension and internal pressure caused by drilling fluid circulation. In addition, alternating bending loads due to non-perpendicular or borehole deflection may be superimposed on these fundamental load modes.
4. Line pipe
Line pipe is used to transport oil and gas.
5. Drill Collar
The drill collar is at the bottom of the drill string. Drill collars are the main component of the lower drill tool assembly. The main feature of the drill collar is the large wall thickness (generally 38~53mm, equivalent to 4~6 times the wall thickness of the drill pipe). Drill collars have greater gravity and rigidity. In order to facilitate the tripping work, elevator grooves and slip grooves can be processed on the outer surface of the inner thread of the drill collar.
6. Coupling
Coupling is used to connect two threaded pipes with internal threads.
7. Pup Joint
A pup joint is a short casing or tubing used for handling production tubing assemblies and for spacing out full length tubing and casing strings. Pup joints are also known as saver sub, spacer and pup.
Features of Oil Country Tubular Goods (OCTG)
1. Saving expenses and reducing costs
2. Increasing production in the petroleum industry.
3. Safety, reliability and long service life.
4. The outer surface of the coupling must not have defects such as folds, hairlines, separation layers, cracks, rolling folds, and scarring.
5. The thread surface of the casing and coupling should be lubricated, and burrs, tears and other defects that can interrupt the thread and affect the strength and tight connection are not allowed.
6. The domestic oil casing is in accordance with the regulations of SY/T6194-96, and the length of the casing is not fixed, and its size is 8-13m. But the casing not shorter than 6m can be supplied, and its quantity shall not exceed 20%.
7. The inner and outer surfaces of the casing shall not have folds, hairlines, separation layers, cracks, rolling folds and scarring. These defects should be completely removed, and the removal depth should not exceed 12.5% of the nominal wall thickness.
Functions of Oil Country Tubular Goods (OCTG)
1. Steam injection
In the process of thermal recovery of heavy oil, heat-insulated tubing should be used to input steam downhole.
2. Extraction of oil and gas
After the oil and gas wells are drilled and cemented, the tubing is placed in the casing of the oil layer to extract oil and gas to the ground.
3. Water injection
When the downhole pressure is not enough, inject water into the well through the tubing.
4. Acidizing and fracturing
In the late stage of well drilling or in order to increase the production of oil and gas wells, it is necessary to input acidizing and fracturing media or solidified substances into the oil and gas layers. And the medium and solidified substances are transported through tubing.
Price of Oil Country Tubular Goods (OCTG)
The Oil Country Tubular Goods (OCTG) Price will change randomly with factors such as production cost, transportation cost, international situation, exchange rate, market supply and demand of raw materials. Sino Mechanical, as one of global Oil Country Tubular Goods (OCTG) Manufacturers, aims to provide you with high quality and best price Oil Country Tubular Goods (OCTG).
Supplier of Oil Country Tubular Goods (OCTG)
Sino Mechanical is supplier of Oil Country Tubular Goods (OCTG).
Sino Mechanical, as a Oil Country Tubular Goods (OCTG) manufacturer, has more than 20 years extensive experiences in the performance, application and cost-effective manufacturing of Oil Country Tubular Goods (OCTG). We are global Oil Country Tubular Goods (OCTG) supplier. We offer a wide range of drilling equipment and have Oil Country Tubular Goods (OCTG) for sale. We also provide OEM services. We design, manufacture, and sell Oil Country Tubular Goods (OCTG) for your drilling applications. If you are looking for Oil Country Tubular Goods (OCTG) for sale, contact us to get the Oil Country Tubular Goods (OCTG) price.
