Tubing Dimensions: 1.05” to 4-1/2” with End Processing Forms NU (Non-Upset)

2. Petroleum Tubing: Specifications 1.05”-4-1/2” with End Processing Forms NU
(Non-Upset) and EU (Upset)

Petroleum tubing is one of the essential devices in the process of oil
extraction and transportation. Its main function is to transport oil and
natural gas from underground to the surface. At present, the common
specifications of petroleum tubing on the market range from 1.05 inches to 4-
1/2 inches, which can meet the extraction requirements of different oil wells.
There are mainly two types of end processing forms for tubing: NU (Non-Upset)
and EU (Upset). The NU end processing form refers to no additional thickening
treatment at the end of the tubing. The advantage of this processing form is
the lower cost, which is suitable for some wells with lower strength
requirements. The EU end processing form, on the other hand, involves
thickening the end of the tubing, which can greatly increase the tensile and
torsional strength of the tubing, enabling it to better adapt to high-pressure
and complex downhole environments.

Different specifications and end processing forms of tubing have their own
characteristics in practical applications. For example, the small-diameter
tubing of 1.05 inches is usually used in some small oil and gas wells. Its
smaller diameter can reduce drilling costs, and in some areas with better
geological conditions, this specification of tubing can also meet the
extraction requirements. The large-diameter tubing of 4-1/2 inches is mainly
used for the extraction of large oil wells and deep wells, which need to
withstand greater pressure and flow. Therefore, the requirements for the
strength and sealing of the tubing are higher. When selecting petroleum tubing,
users need to make decisions based on the specific conditions of the oil well.
For example, in some oil wells containing corrosive gases, tubing with anti-
corrosion coatings should be selected; in high-pressure oil wells, tubing with
the EU end processing form should be chosen. In addition, the material of the
tubing is also very important. Common materials include carbon steel, alloy
steel, etc., and there are differences in performance and cost for tubing made
of different materials.

The manufacturing process of petroleum tubing is also very strict and involves
multiple procedures, including inspection of raw materials, formation of the
tube body, end processing, and quality inspection. Each procedure must be
carried out strictly in accordance with national and industry standards to
ensure the quality and performance of the tubing. With the continuous progress
of science and technology, the manufacturing technology of petroleum tubing is
also constantly innovating. In the future, more high-performance and high-
reliability tubing 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.

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

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)
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 (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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