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Casing And Tubing Coupling
Category：
Oil country tubular goods
Product Description
Description
About Tubing coupling
Normally tubing coupling OD maximum is 4 1/2”, as the tubing pipe is applied for the drilling activities (Inside the tubing is the sucker rod to drill/pump the oil), couplings type is more various and rigorous than casing, mostly used is thicken type upset coupling (Internal upset and external upset), for short is EUE coupling, it is the most favorable in tubing connections. Tubing with EU end (EUE) coupling connection also called UPTBG. Because of the end of the tubing is thickened (upset), the connecting stress is better than buttress coupling.
Buttress coupling another type used for tubing connections, it has the same thickness of the pipe body, called NU end (NUE)tubing or TBG.
Features
The oil tubing coupling can solve the problem of fatigue fracture in the existing coupling due to stress concentration. Oil tubing end is connected to the inside wall of the coupling in a tapered thread. The coupling body end and oil tubing are connected with same thread pitch flat thread. The coupling is not easy to produce fatigue fracture, and has good connection effect. It can prevent the accident of oil well pipe string break effectively.
About Casing coupling
Casing coupling is for the dimensions more than 4 1/2 inch. Differently than tubing coupling is, casing coupling normally does not need to be thickened (Non-upset), which means no upset casing coupling, so it has following types:
• BTC: Buttress coupling
• LTC: Long buttress coupling
• STC: Short buttress coupling
All three types has same thickness of the casing pipe body, just have different lengths.
The oil casing coupling is a necessary piece used to connect the two casing. The coupling manufacturing method is the same as seamless pipe. The steel pipe ends with internal thread to connect with the upper and lower casing. In order to ensure the joint tightness, the precision of screw thread is strictly required.
Seamless and ERW Casing
|
Specification |
API 5CT |
|
Grades |
K55, N80, L80, C95, P110, Chrome, J55(Modified), J55 (API), PS80 |
|
Special Grades |
For sour services and for deep well with high collapse properties |
|
Dimensions |
OD 4" - 26" WT - 0.2 -0.5" |
|
Length range |
1, 2 or 3 |
|
Thread connections |
API (STC and LTC), BTC, extreme line, etc. |
Seamless and ERW Tubing
|
Specification |
API 5CT |
|
Grades |
J55 (API) J55(Modified), N80, L80, L80 13Cr, P110, Q125, H40 (API) |
|
Thread connections |
API 5B - Last Edition or Premium, EUE, NUE, special seal, metal-to-metal seal and VAGT |
Specification
Casing Couplings Short Thread Specifications:
|
Casing Couplings |
Casing Size OD (inches) |
Coupling Size OD (inches) |
Length (inches) |
Weight per Coupling (lbs) |
Palletized Carton Quantity |
 |
4-1/2 |
5.000 |
6.250 |
8.05 |
343 |
Warehouse Storage
Shandong Tyson Industrial Investment Co., Ltd. is a wholly-owned subsidiary of Taian Jinzhengyuan Economic and Trade Co., LTD., founded in 2005, the main products include Cold rolled and hot rolled steel sheet and coil, carbon steel, low alloy steel, alloy steel, A36 low carbon steel, cold rolled sheet, galvanized sheet, pre-coated galvanized coil (GGPI,GGPL), roofing sheet, steel pipe, steel wire, section steel, stainless steel products and other steel products accessories.
Packing and shipping
Annual sales of more than 2 billion, about 600,000 tons of steel, mainly exported to Russia, South America, the Middle East, Southeast Asia, Europe, America and Africa and other markets,
Application field
With quality to win, heart-to-heart full service, competitive prices and other factors, well recognized by foreign customers.
Customer visit
With quality to win, heart-to-heart full service, competitive prices and other factors, well recognized by foreign customers. Your trust, our motivation, looking forward to your sincere cooperation.
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T/F: 86-538-6993566
Email:info@taisenpaper.com
Cell: +86-13583808650
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Add: 2201, Building A, Guoshan Center, Changcheng Road, Taishan District,
Tai 'an City, Shandong Province
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