Tubing Couplings: Regular, Thickened, Flush, Variable Thread, and Extended

4. Tubing Couplings: Regular, Thickened, Flush, Variable Thread, and Extended
Length

Tubing couplings are essential components in the process of oil extraction and
transportation, primarily used to connect tubing and ensure the sealing and
stability of the tubing system. Currently, there are various types of tubing
couplings available on the market, including regular tubing couplings,
thickened tubing couplings, flush tubing couplings, variable thread tubing
couplings, and extended length tubing couplings.

Regular tubing couplings are commonly used and can meet the basic requirements
for connection and sealing in general oil well extraction. Thickened tubing
couplings are enhanced versions of regular couplings, with increased tensile
and torsional strength, making them suitable for high-pressure and complex
downhole environments. Flush tubing couplings feature a flat surface, which
facilitates installation and reduces friction and wear during the process.
Variable thread tubing couplings can be adjusted according to different tubing
specifications and have good compatibility. Extended length tubing couplings
are designed for situations requiring longer connection distances, providing
more stable connections.

In the manufacturing process of tubing couplings, advanced materials and
technologies are employed. For example, high-strength steel and special anti-
corrosion coatings are used to significantly extend the service life and
reliability of the couplings. Precision machining equipment and strict quality
inspection ensure the dimensional accuracy and sealing performance of the
couplings.

In practical applications, users need to select appropriate tubing couplings
based on the specific conditions of the oil well. For instance, in wells
containing corrosive gases, couplings with anti-corrosion coatings should be
chosen; in high-pressure oil wells, thickened tubing couplings are necessary.
Additionally, the installation of tubing couplings is crucial and must be
carried out strictly according to operating procedures to ensure the solidity
and sealing of the connections.

With the continuous development of oil extraction technology, the design and
manufacturing technologies of tubing couplings are also constantly innovating.
In the future, more high-performance and high-reliability tubing coupling
products will be introduced to the market, providing strong support for the
sustainable development of the oil industry.

Welcome to the Online Store of Tianjin Longkailai Petroleum Equipment Co., Ltd.

Execution Standards: API-5CT, API-5L, API-5B, API 5D

Company Products: Tubing couplings, tubing collars, thickened tubing couplings,
flush tubing couplings, variable thread tubing couplings, extended length
tubing couplings, single-end threaded tubing couplings, internal thread tubing
couplings, tubing connectors, variable thread tubing connectors, variable
diameter tubing couplings, tubing conversion connectors, tubing coupling stock,
tubing nipples, tubing short sections, thickened tubing nipples, tubing lifting
nipples, double male tubing nipples, heavy-weight tubing nipples/short
sections, lifting tubing nipples/short sections, variable thread tubing
nipples/short sections, variable diameter tubing short sections/nipples, tubing
conversion connectors, single-end threaded tubing nipples, coupling stock,
thickened tubing, EUE thickened petroleum tubing, high-pressure tubing nipples,
[casing short sections], [casing nipples], [double male casing short sections],
[double male casing nipples], [casing variable thread couplings], [casing
variable thread connectors], [external thread casing nipples/short sections],
[casing conversion connectors], [high-pressure casing nipples], [casing thread
protectors (cap)], [casing coupling stock], [finished casing products], casing
couplings, coupling stock, short round thread casing couplings, long round
casing couplings, tapered casing couplings, variable thread casing couplings,
casing connectors, casing collars, variable diameter casing couplings,
eccentric casing couplings, casing conversion connectors, API casing, single-
end threaded casing couplings, coupling stock.

Casing Specifications: 4-1/2”-20” with thread types such as STC (Short
Round), LTC (Long Round), BTC (Trapezoidal Thread), etc.

Tubing Specifications: 1.05”-4-1/2” with end processing forms NU (Non-Upset)
and EU (Upset).

Custom Processing: We can process couplings, nipples, variable thread
connectors, etc., in various lengths and sizes according to order drawings.

Processing Forms: Straight connection tubing nipples/connectors, PIN * PIN
(double male nipples), PIN * BOX (male-female finished nipples), BOX * PIN
(female-male finished nipples).

Materials: H40, J55, K55, N80, L80, C-90, C95, T95, P110, Q125, 13Cr-80, 13Cr-
110, Super 13Cr, Nickel-based alloy tubing, etc.

Drill Pipe Specifications: 2-3/8”-6-5/8”, etc.

Thickening Forms: Internal thickening, external thickening, internal and
external thickening. Custom-made products such as drill pipe variable thread
connectors, drill pipe nipples, double male drill pipe nipples, and drill pipe
conversion connectors in various lengths according to orders or drawings.

Materials: E-75, X95, G105, S135, etc.

Company Philosophy: We adhere to the management philosophy of people-oriented
and customer-first. Based on advanced equipment and scientific management, we
provide high-quality products for customers. With a complete marketing network
and service system, we ensure satisfactory service for customers. Let's join
hands to create a brilliant future!

Minimum Order: 1 metric tons

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