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Longxin Petroleum Machinery

Member Units of China's Tier-1 Supply Network for Oil Drilling and Production Accessories

We have independently developed dozens of high-tech products and secured over 20 utility model and invention patents. As a high-tech enterprise in the Binhai New Area of Tianjin, we received funding support from Tianjin's Science and Technology Project Fund in 2010.

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Longxin Petroleum Machinery

Member Units of China's Tier-1 Supply Network for Oil Drilling and Production Accessories

Know More

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About Longxin

Tianjin Longxin Petroleum Machinery Manufacturing Co., Ltd. was established in 2005 and is a member of China's Tier-1 supply network for oil drilling and production accessories. The company primarily focuses on oilfield lifting equipment and extraction technology services.

20 +

20 years of manufacturing and R&D experience

10000 +

Covers an area of more than 10,000 square meters

20 +

Product Patent

100 +

Products are sold in more than 100 countries and regions.

The company is located in Dagang Oilfield, Tianjin, occupying an area of over 10,000 square meters and equipped with more than 160 units of machinery and equipment. It has independently developed dozens of high-tech products and has secured over 20 utility model and invention patents. As a high-tech enterprise in the Binhai New Area of Tianjin, the company received funding support from Tianjin’s Science and Technology Project Fund in 2010.

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Products

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Pump Protector

The protective device installed on this rod pump is positioned at the upper part of the integral tubular rod pump. It serves to prevent sand, wax, scale, and other debris from settling in the well fluid within the upper tubing section of the pump, thereby avoiding their entry into the upper pump barrel. This helps reduce wear on the plunger and pump barrel, and even prevents potential pump jamming incidents.

Soft-seal plunger oil pump

The soft-seal plunger pump is a newly developed pump specifically designed to thoroughly address the issues of plunger sand-binding and wax buildup in fixed valves caused by sand, scaling, and wax deposition in oil wells. The soft-seal rubber cup is a product jointly researched and developed by our company and a high-tech firm in Canada.

Constant-pressure Drainage Device

The constant-pressure drain device shares essentially the same structure, operating principle, and usage method as the conventional baffle-type oil drain器—except that hydraulic pressure is applied directly into the tubing. This system pressure acts on a metal constant-pressure disc installed in the radial port of the drain device. When the pressure difference across the metal disc reaches a preset value, the disc ruptures and detaches, creating an oil-drainage and fluid-discharge hole that leads to the annulus between the tubing and casing. The core technology lies in replacing the traditional copper baffle of the conventional baffle-type oil drainer with a new type of constant-pressure disc used in the constant-pressure drain device. This innovative disc technology ensures that the opening pressure of the drain device is both precise and highly reliable.

Helical Detacher

The upper and lower bodies come into contact, and the head of the central rod—equipped with a rail—enters the rail sleeve on the upper body. At this point, the head of the central rod is guided into the rail tube, where it triggers the downward compression of the spring as the upper and lower bodies begin to rotate relative to each other. Simultaneously, the upward movement of the sliding sleeve causes the rail key to engage fully with the corresponding rail groove, generating torque. As a result, the central rod rotates 90 degrees relative to the upper joint, ensuring that the rail key and groove achieve complete interlocking, thus completing the docking process. When disengagement is required, the operator lifts the sucker rod, causing the脱接器 (disconnect device) to move upward until it releases the joint. As the sliding sleeve’s rail key disengages from the lower body’s rail groove, the upper and lower bodies rotate 90 degrees relative to each other once again. Finally, under the guidance of the rail tube, the head of the central rod moves upward and exits the system, completing the disconnection process.

Oil Rod Rotator

This rotator is designed to prevent the rod and tubing from experiencing consistent, localized wear by incorporating a self-rotating mechanism for the pumping rod. Installed on the traveling block, the device leverages the inertia generated by the alternating upward and downward strokes of the rod string, forcefully initiating a clockwise rotation that keeps the entire rod string continuously spinning inside the tubing. This motion effectively eliminates repetitive friction on the same areas of the pumping rod, ensuring even wear across both the centralizers and the parts most prone to eccentric wear—thereby extending the overall service life of the pumping rod.

Oil-resistant Tubing Anti-Wear Rotary Wellhead

This spinner is a wellhead tubing rotation device designed to prevent rods and pipes from experiencing consistent, localized wear. The device relies on manual operation to gently rotate the production string, shifting the position of tubing wear and ensuring even abrasion across the pipe surface—thereby extending the tubing's service life.

Blog

2025/10/26

The 10th World Petroleum and Natural Gas Equipment Expo Concludes Successfully

The 10th World Petroleum and Natural Gas Equipment Expo has successfully concluded. Tianjin Longxin Petroleum Machinery Manufacturing Co., Ltd. showcased its latest technological achievements and innovative products at this prestigious event, reaping remarkable success. We sincerely thank every customer who visited our booth—your attention and support are the driving force behind our continuous progress.

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2025/10/23

Tianjin Longxin Petroleum Machinery Manufacturing Co., Ltd. cordially invites you to visit the 10th World Oil & Gas Equipment Expo.

Exhibition Dates: October 23 to October 25, 2025 Our Company Booth Number: 3A032-2

2025/03/20

The Bin 109x1 well drainage and gas production project has successfully

In the ongoing journey of energy exploration, every breakthrough embodies the collective wisdom and hard work of

2023/03/28

The gas jet pump test was successfully completed.

The first gas jet pump, jointly developed by Longxin Company and relevant units from Dagang Oilfield, has been running

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