One of the main characteristics of the API tubing pump TH Tubing Pump is being thick-wall and. These pumps are specifically designed for oil production heavy-loading wells. Indeed, the strength of their structure as well as the stability of production have become so critical that they can handle deep wells, high-pressure reservoirs, and even corrosive environments.
On the other hand, the TH tubing pump is capable of delivering a higher displacement capacity and considerably stronger mechanical integrity than a rod pump. Therefore, itshouldnʼt be underestimated as the first choice for long-term, high-output oil production.
Standard drawing system specifications | |||||
2 3/8x1 3/4(60.3x44.5) | 2 7/8x2 1/4(73.0x57.2) | 3 1/2×2 3/4 | 41/2×3 3/4 | ||
Pump code | |||||
20-175 THC | 25-225 TIC | 30-275 THC | 40-375THC | ||
symbol | name | Piece number | |||
B23 | Valve cover reducing joint with extractor (optional) | —— | —— | —— | B23-40 |
B13 | Thick-walled pump cylinder | B13-175 | B13-225 | B13-275 | B13-375 |
C11 | Plunger upper open valve cover | C11-20 | C11-25 | C1-30 | C11-40 |
C13 | Column cold group valve cover | C13-175 | C13-225 | C13-275 | C13-375 |
C16 | Fixed valve cover | C16-175 | C16-225 | C16-275 | C16-375 |
C34 | Tubing coupling | C34-20 | C34-25 | C34-30 | C34-40 |
C35 | Pump cylinder coupling | C35-20 | C35-25 | C35-30 | C35-40 |
N12 | Mechanical support joint | —— | —— | —— | N12-40 |
N13 | Support joint | N13-20 | N13-25 | N13-30 |
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N21 | The upper part is lengthened and short section | N21-20 | N21-25 | N21-30 | N21-40 |
N22 | The lower part is lengthened and short section | N22-20 | V22-25 | N22-30 | N22-40 |
P21 | Integral plunger | P21-175 | P21-225 | P21-275 | P21-375 |
P31 | Fixed valve extractor | P31-175 | P31-225 | P31-275 | P31-375 |
S13 | Support leather bowl seat ring (HR type) | S13-20 | S13-25 | S13-30 | —— |
S14 | Support leather bowl pressure cap (HR type) | S14-20 | S14-25 | S14-30 | —— |
S16 | Support leather bowl coupling | S16-20 | S16-25 | S16-30 | —— |
S17 | Support leather bowl mandrel (HR type) | S17-20 | S17-25 | S17-30 | —— |
S18 | Support leather bowl (HR type) | S18-20 | S18-25 | S18-30 | —— |
V11 | Valve ball and seat |
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| Swimming valve | V11-175 | V11-225 | V11-250 | V11-375 |
| Fixed valve | V11-175 | V11-225 | V11-250 | V11-375 |
S22 | Mechanical bottom locking support assembly | —— | —— |
| S22-40 |
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| 20-175 THC abe | 25-225 THC abe | 30-275 THC abc | 40-375 THabce |
| Optional plunger assembly |
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C15 | Internal thread plunger closed valve cover | C15-175 | C15-225 | C15-275 | C15-375 |
C22 | Internal thread plunger joint | C22-175 | C22-225 | C22-275 | C22-375 |
P23 | Internal thread plunger | P23-175b | P23-225 | P23-275 | P23-375 |
Note: All sizes are in millimeters, and inches are in brackets. | |||||
"The length of the pump barrel is specified in meters (feet), and the standard length is: 0.61m (2ft) to 12.19m (40ft), and the length is incremented by every 0.305m (1ft). Specify the nominal plunger length in meters (feet), and the mating gap is a few hundredths of a millimeter (a few thousandths of an inch). The total length of the lengthened short section is specified in meters (feet), and the standard length is 0.610m (2ft) and 0.914m (3ft). Replacing the P31-375 extractor with the P31-275 extractor is only suitable for pumps with a specification of 4-1/2X3-3/4. When using the B23-40 reducer connector, the P31-275 extractor can be selected. See Annex C for the definition of the symbols of the pump parts. | |||||
Heavy Wall Barrel Construction
This feature makes the equipment much stronger and less prone to deformation when working under high-pressure conditions.
Large Output Capacity
Comparing a larger pump bore to an insert pump, the former displaces a greater volume of liquid.
Wear & Corrosion Resistance
Besides the base metal, other materials like alloy steel, chrome plating, and stainless steel help to make the pumps hard-wearing even in very harsh conditions.
Varied Material Selections
Configurations available on request for H2S, CO2, high sand wells.

Deep oil wells with a large production capacity
High-pressure reservoirs with a need for strong mechanical property
Highly corrosive environment of H2S and CO2
Wells with high sand production need wear-resistant materials
Existing production wells where the first priority is reliability
| Comparison Factor | TH Tubing Pump | Insert Rod Pump |
| Installation Method | Installed as part of the tubing string | Installed inside the tubing |
| Production Capacity | Higher output, suitable for high-volume production wells | Lower output, suitable for standard production wells |
| Well Depth Suitability | Suitable for deep wells | Suitable for shallow to medium-depth wells |
| Pressure Resistance | Performs well in high-pressure well conditions | Limited performance under high-pressure conditions |
| Maintenance Method | Requires pulling tubing for servicing | Easier maintenance without pulling tubing |
| Structural Strength | Heavy-wall design with higher overall strength | Standard structure with moderate strength |
| Application Scenarios | High-output, deep wells, high-pressure and harsh environments | Cost-sensitive, maintenance-friendly conventional wells |
It is certified as per API 11AX standard.
It is manufactured in an ISO 9001 quality management system environment
More than 20 years of experience in producing oilfield equipment.
No failure to underperform in oilfields around the world.
It is developed and made 100% matching the well conditions.
Technical support and competent performance along with a quick
Q: Which wells are TH tubing pumps most suitable for?
A: They would be the perfect choice for deep wells, high-pressure reservoirs, and high-output production systems.
Q: What makes TH pumps different from insert pumps?
A: TH pumps are capable of processing a larger volume. Insert pumps, on the contrary, can be serviced simply by replacing the internal parts without the need to remove the tubing.
Q: Can the types of materials be changed?
A: Absolutely, the materials that are used depend on the level of corrosion and wear of the environment.
Q: Which rules are the pump following?
A: This is in line with API 11AX standard.
Tieling Dongsheng Petroleum Machinery Co., Ltd. was founded in 2000 and it is situated in Tieling City, Liaoning Province. The firm occupies a facility of more than 20,000 sq.m. and has a solid background of 26 years in the R&D as well as production of petroleum machinery. At present, it employs 96 people of whom 20 are professional engineers and technical staff. The company aims at worldwide distribution of quality oil pumps and other equipment used by oilfields.
Core Certifications: We obtained the American Petroleum Institute (API) 11AX accreditation (Certificate No.: 11AX-0118) and also certified with ISO 14001 Environmental Management System, High-Tech Enterprise certification and Intellectual Property Management System.
Quality Assurance: A comprehensive "Rod Pump Quality Certificate" as well as quality inspection reports may be delivered together with the product. We have a professional physical and chemical laboratory which is well capable of not only Rockwell and Vickers hardness testing but also plunger outer diameter measurement, coating thickness measurement, and more than 45,000 other physical and chemical analyses. Besides, video footage of the inspection process can be provided to clients upon their request.

Our factory is capable of producing 20,000 units (or sets) of petroleum machinery equipment annually, and our extensive customization capabilities allow us to offer OEM/ODM services.
Precision Equipment: CNC lathes, electroplating production lines, long-plunger spray-welding machines, hydraulic straightening machines, honing machines, cylindrical grinding machines, and a specialized tubular processing workshop are among our high-tech equipment.
Technical Advantages: We provide specialized plunger pump solutions for corrosive oil wells and high-precision techniques for manufacturing pump barrels.

Our products have been used extensively in several major domestic and international energy projects, which is why we enjoy a good reputation in the industry:
International Cooperation: We have long-term partnerships with internationally recognized oilfield service companies such as SLB (Schlumberger) and Weatherford, supplying them with customized rod pump solutions. Our products are also exported to the United States, Canada, Romania, India, and Indonesia.
Domestic Market: Among our clients are the main domestic energy companies such as CNPC, Sinopec, ZPEC, and CSSC. We provide our products and services to the oilfields in Liaohe, Daqing, Changqing, and Shengli.

Packaging Standards: For equipment packaging, we use export-grade, heavily reinforced wooden crates to keep the items safe and intact even after long-distance sea and land transport.
Lead Time: The regular time for making and delivering an order is 8–10 weeks.
Shipping Methods: In addition to sea shipping, we are capable of land and combined multimodal transport, covering all the main global ports.
Warranty Commitment: We give our products a quality warranty for a standard period (exact details are decided according to product type). Besides defects, our after-sales technical support can also be relied on for any needs.
Sample Service: If you need samples for testing and evaluation, we can send them to you (you need to pay for the shipping costs).