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ZLCONN Sub savers Specification

ZLCONN Sub savers used for petroleum, natural gas industry and geologic exploration.

Technical specification and parameters for Drill Tool Lifting Sub
No.Nominal size
(mm)
I.D.(mm)End of pinLifting end
ConnectionO.D.(mm)DF/mmTong Space
LPB/mm
O.D (mm)Tong Space
LPB/mm
17331.8NC2379.476.2250111.1100
244.5NC2688.982.9
38954NC31104.8100.4127
450.8NC35120.7114.7
568.3NC38127121
612771.4NC44152.4144.5168.3
7158.8149.2
882.6NC46158.8150
9165.1154.8
10171.5159.5
11NC50177.8164.7
12184.2169.5
13NC56196.8185.3300
14203.2190.1
1595.36 5/8 REG209.6195.7
16NC61228.6212.7
177 5/8 REG241.3223.8
18NC70247.7232.6
19254237.3
20NC77279.4260.7

 

1.STRENGTH & EXPERIENCE

ZLCONN has 20 years’ experience in manufacturing drill pipe for the Chinese and international markets. Sales in 2018 are approaching 250,000 pipes, and we are pursuing a US$4 million expansion and upgrading program that will lift
capacity to well in excess of 300,000 pipes in 2019.

2.INTERNATIONAL SERVICE CULTURE & PRODUCT SUPPORT

We stand by our products. Our aim is 100% customer satisfaction and to that end we take every enquiry and every question with equal seriousness. Our multilingual, multicultural management team prioritizes smooth, effective communication.
We work together with our partners and end-users to help ensure they get maximum value from every product. If necessary, we send staff members and engineers on site for further study and training. All our products are fully
guaranteed against defects in materials or workmanship.

3.QUALITY MANAGEMENT

Our quality team’s work begins by ensuring a consistently high standard of raw material: checking every batch on
delivery against the technical team’s strict criteria for dimensional accuracy and steel chemistry. Once approved
for production, every item is issued a work number that allows us to track it through each subsequent step of the
manufacturing process.
We are dedicated to continuous improvement of all production and delivery processes. No pipe is released to market without a quality report verifying compliance with all destructive and non-destructive testing criteria. We aim
to achieve 100% traceability to ensure our partners and customers can use North Star products with complete confidence.

4.CONTINUOUS INVESTMENT

ZLCONN is investing US$4 million in 2018 and 2019 as we upgrade equipment and expand production into a new
12,000-square meter workshop, complete with a loading bay that will allow containerization of export product by our
own dedicated team. In 2018 we have already installed a dedicated tool joint forge and heat treatment line, enabling both cost savings and more effective in-house quality control.

5.TRUST IN PARTNERSHIPS

ZLCONN believes in long-term, mutually supportive business relationships. We are totally committed to working
together with our partners: making sure we match the right product with the right project – and at the right price.

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