What is the lead time for orders?

The average lead time is one month, applicable for both peak and off-peak seasons.

Are OEM and ODM services available?

Yes, we offer both OEM and ODM services for our products.

What payment terms do you accept?

We accept LC (Letter of Credit) and T/T (Telegraphic Transfer) as payment terms.

OCTG Seamless J55 L80 N80 Tubing Coupling

Name: OCTG Seamless J55 L80 N80 Tubing Coupling
Brand: Dongying Zhaoxin Industry and Trade Co, Ltd.
SKU: 2125769015

Shandong, ChinaDongying Zhaoxin Industry and Trade Co, Ltd.

US$5.00

1 Piece

Sample price:US$8.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

Yes

Warranty

1 Year

Model NO.

2-7/8

Manufacturing Process

CNC Milling

Surface Treatment

Galvanized

Operation Pressure

Atmospheric Pressure

Material

Alloy

Product Name

Tubing Coupling

Transport Package

Wooden Case

Specification

2-3/8'', 2-7/8'', 3-1/2'', 4'', 4-1/2''

Trademark

Origin

China

Key features

Wide Material Range: Available in J55, K55, N80, L80, P110, C90, T95 and more steel grades.

Dual Thread Types: Offers both NUE (Non-Upset) and EUE (External Upset End) coupling types.

Precision CNC Machining: Processed by numerically controlled lathes and import molding cutters for accuracy.

Comprehensive Testing: Includes tensile, impact, chemical, and sulfide stress cracking tests for quality assurance.

100% Joint Efficiency: EUE connections provide tension and pressure strength greater than the pipe body.

Strict Size Tolerances: Precise control over OD, wall thickness, length, straightness, and thread angles.

ISO Certified Quality: Company holds ISO-9001, ISO-14001, and OHSAS-18001 certifications.

Customization Options: Other sizes and connections available upon request.

Company profile

Dongying Zhaoxin Industry and Trade Co, Ltd.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2014-04-14 CertifiedNearest Port: Qingdao PortAverage Response Time: ≤11.04h CertifiedTerms of Payment: LC, T/T

AI-Powered supplier vetting

SummaryDongying Zhaoxin Industry and Trade Co., Ltd. is a China-based limited company in Shandong that manufactures and processes oilfield tools and equipment. The supplier reports ISO9001:2015, ISO14001:2015, and ISO45001:2016 certifications, a dedicated R&D team, more than 40 national patents, six to ten quality-control staff, and two production lines. It offers downhole tools, cementing tools, wellhead equipment, oil-well packers, tubing anchors, and torque anchors. The company states that it provides research, development, manufacturing, sales, and after-sales service. Export activity is documented since 2014, with markets in South America and Europe, although export sales represent only 11%–20% of total sales. Evidence is insufficient to assess financial credibility, customization capability, or specific customer cases.

Supplier typeThe supplier is a Chinese limited company engaged in manufacturing and processing machinery, specifically oilfield tools and equipment. Its stated activities cover research, development, manufacturing, sales, and after-sales service, indicating a manufacturer rather than only a trading intermediary.

CertificationsThe supplier explicitly reports ISO9000 international quality-system certification and current ISO9001:2015, ISO14001:2015, and ISO45001:2016 certificates. These certifications provide direct evidence of formal quality, environmental, and occupational-health-and-safety management systems.

After-Sales capabilityThe company explicitly states that its business includes sales and after-sales service for oilfield tools and equipment. However, the slices do not describe service coverage, staffing, response times, spare parts, or warranty terms.

R&D capabilityThe supplier reports a practical and experienced R&D team, more than 40 national patents, five years of R&D-engineer experience, and a stated focus on new products and technology. These claims directly support an established innovation function, although no patent titles or technical performance data are provided.

Production capacityThe supplier operates a manufacturing plant of 11,000 square meters, two production lines, and reports one-month order fulfillment in both off-peak and peak seasons. Its listed product scope covers multiple oilfield equipment categories, supporting production capability, although detailed capacity and equipment information is unavailable.