Lite TMK UP™ CWB Range: /2 – /8’’ / ,3 – ,73 mm Unique Feature Compatibility with API Buttress Rotateable semi-premium connection Thread Profile Buttress thread form interchangeable with API Buttress eliminating the need for expensive crossovers Sealability through thread c. We provide BTC casing coulings from /2″ to 20″, in grade J55, K55, N80, L80 and P The buttress thread casing joint strength is given as the lesser of the fracture strength of the pipe body (the pin) and the coupling (the box). 1. Size: /2″ ~ 20″. 39 rows · Casing Couplings. ute-strohner.ded in Casing from /2 to 20inch. ute-strohner.de Types:STC,LTC and .
Btc thread blanking dimensionsBTC Casing Coupling
The leadscrew type is often used in machinery and the sealing type is often used in oil fields. Connections must be clean and dry when applying thread lock. Do not apply thread compound to pin or box.
Make Up 1. API Buttress connection is designed to be made up to a final position, there is no final torque specified. Make up acceptance criteria is defined based on the relative position of the coupling face compared to the triangle stamped on the pin end:. Minimum Make up: One full thread turn before triangle base.
Maximum Make up: Triangle apex. There is no torque specification for API Buttress however torque values required to reach an acceptable make up tend to be similar within the same batch of pipe.
In order to determine make up torque for the string to be run:. Make up the first 15 joints to the base of the stamped triangle, taking note of the required torque for each joint. Calculate the average torque. Use the average torque to make up the string. Ensure all make ups are acceptable by checking the coupling face position within the triangle. It may occur that during the make up, the coupling rotates on the mill end. This can be allowed provided the coupling face on the mill end does not exceed the apex of the triangle stamped on the mill end pin.
Running 1. To avoid cross threading stab pipe in a smooth controlled fashion ensuring the pipe is vertical when doing so, continue to support and stabilise the pipe throughout the stabbing and make up operation.
Couplings shall not be expanded to provide required threads taper under API specifications. NOTE Couplings with API threads may not have a leak resistance as high as the internal yield pressure of the pipe body, due to inadequate bearing pressure between the coupling and pin.
API 5B is the standard specification for threading, gauging, and inspection of Casing, Tubing and line pipe threads. API 5B covers dimensions, tolerances, and marking for API threads and the gauges that control the acceptance criteria for the threads. It includes thread element gauges, instruments, and requirements for the inspection of threads for line pipe, casing and tubing round threads , and buttress casing connections.
Thread dimensions shown without specifications or shown as NA are not subject to inspection of diameter, ovality, and addendum. Thread dimensions shown without tolerances are related to the basis for connection design and are not subject to measurement to determine acceptance of product.
Thread inspection is taken at the point of production before shipment, including inspection at some point of intermediate, at destination, or by third party inspection company from buyer or the manufacturer.
The manufacturer also has right to use other instruments or methods to control manufacturing operations; But material shall be accepted or rejected in case the inspection result complied to the standard or not.
Thread inspection is performed using instruments designed to measure either the functional relationship of multiple thread elements or measure an individual thread element. The inspection requirements include measurements of standoff, diameter, ovality, addendum, taper, lead, height, and thread angel.
Ring and plug gauges are designed to measure the functional size of an internal or external thread. Individual thread elements listed in API 5B are measured with one or more specific instruments. Premium connection is a higher class connection type for used to connect casing or tubing pipelines. Premium couplings and premium threads are the patent product that only with manufacturer authorization it can be produced or sold.
Below are common brands or models for the premium connections. API casing and tubing coupling dimension ranges from OD 1. For Group 4: Not only internal machining could be done to Coupling, external machining also could be done to.
Except API couplings and threads shall comply to C. According to API 5CT specification, the internal and external surface of coupling shall not have folding, cracks, separation, scaling and other defects. Tests for making couplings is similar with the casing and tubing, which includes: Tensile test, flattening test, hydrostatic pressure test, sulfide stress corrosion cracking test, grain size determination, transverse impact test and hardness test. Octal supplies API couplings for casing and tubing connections, feel free to contact us for any of the request refer to the API or premium connections.
Octal is located in China recognized as a leading supplier, distributor, and manufacturer union in providing piping solutions for oil and gas company. Steel Coupling Definition As we know steel pipe coupling is a short pipe or tube that with threads on both ends, used to connect pipelines.
What is API coupling used for? To be simple, it is the internally threaded cylinder for joining two lengths of threaded pipe. Raw material selection Mechanical test including tensile strength Impact test Chemical properties control Sulfide stress cracking test for Material grades in C90 or T95 Size tolerances, OD, Wall Thickness, Length and Straightness Threads control, threads quantity per inch, threads angle etc Premium threads option will be more rigorous Heat treatment Additional markings Material certification Product Specification Level PSL-2 or PSL-3 API coupling specification As we told, one of the important figure of API coupling, that it shall be made of seamless, another is the same grade as the casing or tubing pipe body, and these materials are used for manufacturing the blank coupling.
Coupling Mechanical Properties Mechanical properties of casing or tubing coupling shall comply to the clauses 7 and 10, covers test frequency, retest provision, etc. How many types for the API couplings There are several types covered in API 5CT standard for coupling specifications, classified in regular couplings, special clearance couplings, combination couplings, reducing couplings, seal ring couplings, and special bevel tubing regular couplings.
Special clearance couplings In case specified in the contract, special-clearance reduced outside diameter Wc couplings for buttress BTC connection casing and external upset EUE connection tubing shall be furnished. Combination couplings Combination couplings with different types of thread of the same specified size shall be furnished when specified on the contract.
Reducing couplings Reducing coupling is also kind of pup joint, used to connect two pipes of different diameter with the same or different types of thread on the two ends.
Seal-ring couplings Sealing-ring couplings conforming to the requirements shall be furnished when specified in the PO. Special clearance coupling When specified in the order, special-clearance reduced outside diameter couplings for buttress casing and external upset tubing shall be furnished.
Combination coupling Reducing coupling are used to connect two pipes of different diameter with the same or different types of thread on the two ends, and shall be furnished when specified on the agreements. Differences between Casing coupling and tubing coupling There are couplings for casing and couplings for tubing, the function is the same that to connect the pipe each other. Features The oil tubing coupling can solve the problem of fatigue fracture in the existing coupling due to stress concentration.
Threading and Gauging API 5B covers dimensions, tolerances, and marking for API threads and the gauges that control the acceptance criteria for the threads.
Coverage—Inspection Thread inspection is taken at the point of production before shipment, including inspection at some point of intermediate, at destination, or by third party inspection company from buyer or the manufacturer.
Premium coupling and threads type Premium connection is a higher class connection type for used to connect casing or tubing pipelines. Appearance quality According to API 5CT specification, the internal and external surface of coupling shall not have folding, cracks, separation, scaling and other defects. Test methods Tests for making couplings is similar with the casing and tubing, which includes: Tensile test, flattening test, hydrostatic pressure test, sulfide stress corrosion cracking test, grain size determination, transverse impact test and hardness test.
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