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Longxin Petroleum Machinery

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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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

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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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Rod Rotator

In sucker‑rod pumping systems, the movement of sucker rods inside tubing is complex. Such movement causes severe friction between sucker rods and tubing, resulting in sucker‑rod breakage and tubing perforation.

Tubing Rotators

Slimline Tubing Swivel

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.

Blog

2026/10/12

Understanding the Soft-Seal Plunger Oil Pump: Key Insights for Professionals

The Soft-Seal Plunger Oil Pump is a vital component in the petroleum equipment sector, renowned for its efficiency and reliability in handling various oil extraction applications. This type of pump operates on the principle of positive displacement, utilizing a plunger mechanism that moves back and forth within a cylinder, creating a vacuum that draws oil in and subsequently pushes it out. The sof

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2026/10/11

How Constant-Pressure Drainage Devices Revolutionize Oil Extraction

How Constant-Pressure Drainage Devices Revolutionize Oil Extraction The oil extraction industry is continuously evolving, driven by the need for increased efficiency, reduced operational costs, and adherence to environmental standards. One of the most significant advancements in this field is the introduction of **constant-pressure drainage devices**. These innovative tools are not only changing h

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Understanding the Role of Oilfield Helical Detachers in the Energy Sector

In the oil and gas industry, specialized equipment plays a vital role in enhancing efficiency and safety during extraction and production processes. One such specialized device is the Oilfield Helical Detacher, which serves a critical function in the operation of various drilling and production systems. Understanding how this equipment works and its applications can provide valuable insights for p

2026/10/09

How Oil Rod Rotators Enhance Efficiency in Drilling Operations

How Oil Rod Rotators Enhance Efficiency in Drilling Operations Table of Contents Introduction to Oil Rod Rotators The Importance of Efficiency in Drilling Operations What Are Oil Rod Rotators? Benefits of Using Oil Rod Rotators in Drilling Increased Efficiency in Drilling Reduced Wear and Tear on Equipment Improved Safety for Workers

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