SHANDONG SAIGAO GROUP CORPORATION
4-1/2'' Casing Pipe

4-1/2'' Casing Pipe

API 5CT casing is inserted into a well bore and cemented in place to protect both subsurface formations and the well bore from collapsing and to allow drilling fluid to circulate and extraction to take place.


The cost of casing is a major part of the overall well cost, so selection of casing size, grade, connectors, and setting depth is a primary engineering and economic consideration. Saigao supply API 5CT standard casing pipe with assured quality and competitive price.  Your honored customers' need is our goal to work for with our best efforts!


Features of  4-1/2'' Casing Pipe:

4-1/2"(114.3mm) Seamless Casing Pipe

API-5CT Seamless Casing Pipe

Steel grade: J55/K55/N80/L80/P110/C95/13Cr/28Cr

Threads: BTC, LTC, STC,PRMIUM CONNECTION

Length range: R1, R2, R3

Application of 4-1/2'' Casing Pipe:

Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or wellbore. It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow drilling fluid to circulate and extraction to take place. The following diagram illustrates different types of casing used in the extraction process:

4-1-2.jpg

Surface casing

  • Protects the well from contamination in shallow water and gas layers.

  • Supports the wellhead equipment and sustains the weight of the other layers of casing.

Intermediate casing

  • Isolates different layers of pressure to facilitate normal circulation of drilling fluid and protect the production casing.

  • Intermediate casing facilitates the installation of blow-out preventers, anti-leakage devices and tailpipes in the well.

Production casing (oil string)

  • It is the conduit through which oil and gas pass from a below surface reservoir.

  • It protects the well and separates fluids into various layers.


For the manufacture of tubing, green pipes undergo an "upsetting" process to thicken the walls of the pipes. Apart from this step, the manufacturing of tubing and casing are identical. First, green pipes are threaded on each end. The threading is then inspected and, if necessary, re-threaded to ensure that the thread accurately connects to the coupling. The tubing and casing are strengthened by surface treatment and are subject to various inspections, including drifting and hydrostatic tests before they are coated and packaged into tubing and casing.


Casing pipes are ordinarily produced with outside diameter sizes of 114.3 mm to 508.0 mm.


Technical Specifications of 4-1/2'' Casing Pipe:

OD mmIb/ftGradeW. Tshortlongbuttress
114.30(4 1/2" )9.5H, J, K5.21YES

10.5J, K5.69YES
YES
11.6J, K, C, L, N, P6.35YESYESYES
13.5C, L, N, P7.37
YESYES
15.1P, Q8.56
YESYES

a: Buttress casing is available with regular, special clearance couplings or special clearance couplings with special bevel.

P= Plain end; S= Short round thread; L= Long round thread; B= Buttress thread.


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Contact Us

sales@saigaogroup.com susan@saigaogroup.com
0531-69959201
qg18653457231
+86 18653457231
Zhongrun Century Center, No 12111,Jingshi Road, Lixia District, Jinan City, Shandong Province. P.R. China

Contact Us

sales@saigaogroup.com susan@saigaogroup.com
0531-69959201
Zhongrun Century Center, No 12111,Jingshi Road, Lixia District, Jinan City, Shandong Province. P.R. China