The Lifting Oil Drain (alias Pull-up Tubing Drain Valve) is an essential component of artificial lift systems, mainly for use in sucker rod pump applications. Essentially, it lets the fluid in the tubing string flow down the casing annulus once the tubing is pulled during a workover.
When operators involve Doushen’s lifting oil drain in the operation, they can guarantee performing a "dry job" which means a dramatic drop in environmental pollution around the wellhead, a safer environment for the crew, and the precious time during maintenance is saved.
Environmentally Friendly:
Prevents oil from spilling on the surface during tubing removal, thus, helping to maintain environmental standards and regulations compliance.
Pressure-Balanced Design:
Featuring our high-level sealing technology, the valve will stay shut and without any leaks during normal pumping processes even if internal pressure changes arise.
Easy to Use:
Basically, it gets activated by just raising the tubing string and in many cases, there will be no need for anymore tools or complicated "drop-bar" methods.
API 11AX & ISO 9001 Certified:
Made to rigorous quality control standards and tolerating tough downhole environments (H2S, CO2, and high temperature).
Robust Construction:
The product consists of heavy-duty alloy steel (e.g. 42CrMo) along with targeted surface treatments delivering the best wear and corrosion resistance.
| Feature | Specifications |
| Material | Alloy Steel (42CrMo), Stainless Steel, or Custom |
| Tubing Sizes | 2-3/8", 2-7/8", 3-1/2" (EUE/NUE) |
| API Standard | Compliant with API 11AX / API 5CT |
| Activation Method | Pull-up (Lifting) or Shear Pin |
| Pressure Rating | Up to 5,000 PSI (Customizable) |
| Connection Type | Pin x Box / Pin x Pin |
The Lifting Oil Drain is installed in the tubing string at a predetermined depth above the pump.
During Production: The valve remains in the "closed" position, sealed by high-performance O-rings and held by shear pins or a mechanical sleeve.
During Retrieval: When it’s time to pull the pump, the operator applies a specific upward tension (lifting) to the tubing. This action shears the pins or shifts the sliding sleeve, opening the drainage ports.
Fluid Discharge: Once opened, the fluid column inside the tubing drains into the annulus, allowing the string to be pulled dry.
Sucker Rod Pump (SRP) systems.
Wells requiring frequent workovers or pump inspections.
Environmentally sensitive oilfield sites.
Deep well and high-pressure oil production.
Q1: What sizes of tubing is this Lifting Oil Drain compatible with?
A: Dongsheng’s lifting oil drains allow you to use the most common tubing string sizes as per API standards. We produce drainage tools for 2-3/8", 2-7/8", and 31/2 EUE or NUE tubing. If you have casing or tubing with special dimensions, we can customize our oilfield drainage solutions for you as well.
Q2: Can this oil drain valve be used in H2S (Sour Service) or CO2 environments?
A: The drain valve is suitable for such environments. We prioritize our customers' safety and efficiency in harsh downhole conditions. To meet your operational needs in sour service (H2S) or high-corrosion environments, we have made the drain valve from materials that comply with NACE MR0175, including the use of high quality stainless steel or specially heat-treated alloy steel, combined with premium seals to ensure a longer service life and resistance to hydrogen embrittlement.
Q3: How do I adjust the opening pressure/force of the lifting oil drain?
A: Activation force can be controlled easily. The number and material of the shear pins determine the force required to activate the drain valve. Prior to installation, it is possible for you to compute the pull-up force that will be necessary for the well depth and fluid weight you have. Dongsheng not only includes in every order a Shear Pin Force Chart, but also detailed instructions on setting the breaking point accurately for dependable drainage.
Q4: Is the Lifting Oil Drain reusable after the tubing is pulled?
A: Yes you can. With Dongsheng lifting oil drains, multi-cycle usage is the intent. Only sheared pins are to be replaced and the O-rings (sealing elements) should be inspected/replaced after the tubing string is retrieved. Once done, the tool practically becomes a new member of the well operations g e a r , helping to keep costs low over long-term operations.
Q5: What are the main advantages of a Pull-up Drain vs. a Drop-bar Drain?
A: Because the Lifting (Pull-up) Oil Drain is more in line with modern workover practices, it features the biggest advantage of not needing to drop a heavy bar from the surface which may sometimes get stuck or damage the pump. It allows a more controlled activation by using the rig’s hoisting system and hence is the more reliable way of preventing the workover floor from oil spill and ensuring a "dry job".
Q6: Does this product meet API 11AX standards?
A: Yes, Dongsheng Machinery is an ISO 9001 and API registered manufacture. Every lifting oil drain is subjected to pressure testing as well as materials certification in order to confirm that it is up to the global oilfield operations safety and performance requirements at the highest standards.
Tieling Dongsheng Petroleum Machinery Co., Ltd. was established in 2000. As a leading pump manufacturer in China, it is committed to design, develop, manufacture and supply oilfield products such as sucker rod pump, special sucker rod pump and downhole tools, etc. The company is the qualified material supplier of CNPC , Sinopec and Weatherford. It covers an area of more than 20,000 square meters, 96 existing staffs, including 20 engineers and technicians.Registered capital of 56 million yuan.Annually produce more than 20,000 oil pumps and special oil pumps.
Tieling Dongsheng Petroleum Machinery Co., Ltd. has been certified by ISO 9001 Quality Management System, and licensed to use API11AX certificate. The company covers 100 kinds of Sucker Rod Pump products and Accessories such as subsurface tubing pump, long-plunger anti-sand pump, drain, centralizer, spray metal plunger,alignment and unified grinding, etc. The company has established a complete inspection system and apply entire-process-control and inspection, from raw materials, semi-finished products to finished product.
Our products have been widely used in major China Oilfields, such as Liaohe, Daqing, Changqing, Shengli. Meanwhile products have been distributed to USA, Canada, Romania and Indonesia etc.
The company is committed to set "Dongsheng" image and create "Dongsheng" brand. Focus on the customer and delivery the maximum value for customers as the management concept, positive enterprising to make a greater contribution to the petroleum drilling.
Founding
Our company was established with the primary business of designing, researching, developing, and manufacturing oil pumping equipment and downhole tools, providing high-quality supporting products to domestic oilfields.
Technological Upgrade
Officially became a professional manufacturer of petroleum equipment. Awarded Quality Management System Certification and API 11Ax Certification.
Capacity Expansion
The intelligent oil production equipment workshop has been completed, adding an annual production capacity of 60,000 oil pumps and related products.
Manifestation of Standardized Management
In 2021, our company obtained certification for its Occupational Health, Safety, and Environmental Management Systems, thereby establishing a foundation for standardized operations.
Qualification Upgrade
In 2024, our company successively obtained certifications for Measurement Management Systems (AAA), Intellectual Property Compliance, and Five-Star Service, demonstrating a continuous enhancement of its comprehensive management and service capabilities. In August of the same year, the company was recognized as a "Liaoning Province Gazelle Enterprise" and became a qualified supplier for both China National Petroleum Corporation (CNPC) and China Petrochemical Corporation (Sinopec).
Workshop Expansion
In 2026, we successfully obtained API Q1 certification. Concurrently, we are actively advancing the expansion project for our intelligent oil production equipment workshop; construction for this project is scheduled to commence at the end of May 2026, at which time it will add 20 new intelligent electroplating and surface treatment production lines.
