Casing Specifications: 4-1/2”-20” with Thread Types STC (Short Round), LTC

Oil Casing: An Essential Component in Oil Drilling

Oil casing is an indispensable part of the oil drilling process. It plays a
crucial role in supporting the wellbore and preventing collapse, while also
providing a stable channel for the extraction of oil and gas. Currently, the
common specifications of oil casing on the market range from 4-1/2 inches to 20
inches, which can meet the needs of wells with different depths and geological
conditions. In the production of oil casing, the design of the thread type is
particularly critical. The STC (Short Round) thread type, which is relatively
short and round in shape, is an early widely used type. It is relatively simple
in processing technology, but its strength and sealing performance are
relatively weak. With the development of technology, the LTC (Long Round)
thread type has gradually become mainstream. The LTC thread type has
significant improvements in length and sealing performance, and can better
adapt to high-pressure and high-temperature downhole environments. The BTC
(Buttress Thread) is one of the most advanced thread types at present. Through
its special trapezoidal design, it greatly improves the tensile and torsional
strength of the casing, and also achieves a very high level of sealing
performance.

Different specifications and thread types of oil casing have their own
advantages in practical applications. For example, 4-1/2 inch casing is usually
used in shallow wells and small oil wells. Its smaller diameter can reduce
drilling costs, and in some areas with better geological conditions, this
specification of casing can also meet the extraction requirements. On the other
hand, the extra-large 20-inch casing is mainly used for deep-sea and ultra-deep
well extraction. They need to withstand huge formation pressures and complex
geological conditions, so the requirements for the strength and sealing
performance of the casing are extremely high. When selecting oil casing, users
need to take into account a variety of factors such as the depth of the oil
well, geological conditions, and extraction processes. For example, in oil
wells containing corrosive gases, casings with anti-corrosion coatings need to
be selected; in high-temperature and high-pressure oil wells, high-strength,
high-sealing BTC thread type casings need to be selected. In addition, the
material of the casing is also very important. Common materials include carbon
steel, alloy steel, etc. Casings made of different materials have differences
in performance and cost. In short, as one of the core equipment in oil
extraction, the selection of the specification and thread type of oil casing
has a crucial impact on the extraction efficiency and safety of the oil well.
With the continuous progress of science and technology, the design and
manufacturing technology of oil casing are also constantly innovating. In the
future, more high-performance, high-reliability casing 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 joint tubing couplings, variable thread tubing couplings, extended 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),
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 (one male one female finished nipples), BOX *
PIN (one female one 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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