High-Temperature Rubber Progressive Cavity Pump

I. Product Working Principle

    The high-temperature downhole progressive cavity pump (PCP) is a new type of positive displacement oil production equipment specially developed by Shengli Highland Company for high-temperature and harsh complex downhole working conditions in oilfields. It overcomes the high-temperature resistance limitations of conventional PCPs and features excellent working condition adaptability and operational stability, widely applicable to oil production operations in various deep high-temperature oil wells. The core components consist of a high-precision eccentric metal rotor and a fixed special rubber stator. Relying on the precise and controllable interference fit between the rotor and the stator, multiple evenly arranged, mutually isolated and fully enclosed independent sealing cavities are formed inside the pump. These isolated cavities deliver excellent sealing performance, laying a solid structural foundation for leak-free enclosed transportation of downhole media. During operation, the surface drive unit drives the rotor to perform continuous and stable eccentric rotation inside the stator via the sucker rod. With the continuous circular motion of the rotor, the enclosed sealing cavities inside the pump axially and uniformly move from the pump inlet to the outlet. Throughout the displacement process, the cavity volume remains constant and fully sealed, steadily carrying complex fluids such as crude oil, oil-gas mixtures and high-sand heavy oil for axial transportation and continuous pressurization. The unique positive displacement working principle fundamentally eliminates common problems of traditional pumping units and centrifugal pumps, including fluid pulse impact, turbulence disturbance and drastic pressure fluctuation. It ensures stable and uniform medium transportation with constant output displacement, avoiding impact and wear on downhole casings, formations and pump structures, thus effectively extending the service life of the equipment. Supported with the company’s self-developed special high-temperature resistant stator rubber formula, the pump solves the industry pain points of conventional rubber stators such as softening, deformation, failure and sealing leakage under high-temperature conditions. It can operate continuously and stably in downhole environments up to 170℃, and is compatible with complex working conditions involving heavy oil, high sand content and high gas content, perfectly meeting the long-term and continuous production requirements of various deep high-temperature oilfields

II. Advantages and Features

    Inheriting the structural advantages of traditional progressive cavity pumps, Shengli Highland Company’s high-temperature downhole PCP is optimally upgraded in high-temperature resistance, aging resistance and wear resistance. It features reliable overall structure and strong adaptability to complex working conditions with prominent core performance advantages, which are detailed as follows:

• Self-developed High-temperature Resistant Stator Rubber Formula: The core stator adopts Shengli Highland Company’s independently developed special high-temperature resistant rubber formula, optimized through multiple rounds of high-temperature aging, pressure resistance and wear resistance tests. Different from ordinary commercial rubber materials, it delivers outstanding high-temperature resistance, thermal aging resistance and thermal deformation resistance. It can stably operate under two grades of extreme downhole high-temperature conditions of 150℃-170℃ and 180℃-220℃ without softening, expansion, cracking or sealing failure. The stable cavity sealing performance greatly reduces equipment failure rates, thoroughly solving the bottleneck of conventional PCPs failing to adapt to deep high-temperature oil wells.

• Rubber SN.	Working Temperature	Maximum operating temperature	Resistance to aromatic hydrocarbons	resistance to solid particles	Resistance to H2S	Resistance to CO2
  GY-1	80℃	90℃	★★☆☆☆	★★★☆☆	★☆☆☆☆	★★☆☆☆
  GY-2	100℃	120℃	★★★☆☆	★★★★☆	★☆☆☆☆	★★★☆☆
  GY-3	80℃	90℃	★☆☆☆☆	★★★★☆	★☆☆☆☆	★☆☆☆☆
  GY-4	120℃	130℃	★★★☆☆	★★★★☆	★★★☆☆	★★★☆☆
  GY-5	150℃	170℃	★★★☆☆	★★★★★	★★★★☆	★★★☆☆
  GY-P	80℃	90℃	★★☆☆☆	★★★★☆	★☆☆☆☆	★☆☆☆☆
  GY-A	120℃	130℃	★★★★☆	★☆☆☆☆	★★★☆☆	★★★☆☆
  GY-E	150℃	170℃	★★★★★	★☆☆☆☆	★★★★★	★★★★★
  GY-F	180℃	220℃	★★★★★	★☆☆☆☆	★★★★★	★★★★★

• Compact Structure for Convenient Installation and Maintenance: The pump features a compact and highly integrated structure with small overall size and light weight, which greatly reduces the cost and difficulty of equipment transportation and hoisting compared with other artificial lifting equipment. The matched surface drive device is simple in structure with a small footprint and requires no complex infrastructure, enabling fast and convenient on-site installation. With fewer components and low structural failure rate, daily inspection and maintenance operations are efficient and labor-saving, effectively reducing on-site operation and maintenance costs and production downtime losses for oilfields.
• Excellent Heavy Oil Adaptability with Strong Medium Conveying Capacity: This high-temperature PCP is highly adaptable to viscous media, capable of stably transporting heavy crude oil with a viscosity below 8000mPa·s, covering most high-temperature heavy oil wells. The constant-volume cavity conveying structure effectively avoids medium stagnation, conveying jamming and uneven displacement, ensuring continuous, efficient and stable production of high-temperature heavy oil wells.
• Superior Sand Resistance Suitable for High-sand and High-temperature Wells: The self-developed special rubber stator possesses good elastic compliance and wear resistance. In high-temperature downhole environments with sandy media, its elastic buffering effect avoids rigid wear on the pump body caused by sand particles, effectively reducing common faults such as sand jamming, rotor and stator wear and sealing failure. It can operate stably for a long time in complex wells with both high temperature and high sand content, significantly improving the production continuity of such wells.
• Excellent Anti-gas-lock Performance for Oil-gas Mixed Transportation: The unique enclosed cavity structure completely eliminates gas lock failures, enabling stable transportation of oil-gas mixtures under high-temperature coexisting oil and gas conditions. The equipment can maintain normal operation even when free gas exists at the pump inlet, with only slight fluctuation in volumetric efficiency. Compared with other oil production equipment, it presents outstanding adaptability and operational stability in high-temperature and high-gas-content oil wells.
• Wide Application Scenarios Suitable for Offshore and Special Well Types: Featuring compact size, small footprint, convenient operation and maintenance and outstanding high-temperature resistance, the pump can be smoothly deployed in deviated well sections, horizontal wells and other special well types. It is applicable not only to various onshore high-temperature vertical wells and deviated wells, but also perfectly suited for production operations of offshore oilfield cluster well groups and horizontal high-temperature oil wells. It fully adapts to the production characteristics of offshore oilfields including limited site space, complex working conditions and difficult equipment operation and maintenance.

III. Size and Specifications

IV. Complete Equipment Set

    Manufactured independently by Shengli Highland Company, the complete high-temperature downhole PCP oil production system boasts dual advantages of core material R&D and structural optimization, delivering far superior overall performance compared with traditional conventional artificial lift oil production systems with remarkable comprehensive production benefits. The overall operating efficiency of the system can reach more than 55%. Its high-efficiency medium conveying capacity greatly improves the single-well production efficiency of oilfields, featuring lower energy consumption and higher cost performance, with comprehensive energy efficiency superior to similar oil production equipment on the market. The maximum installation depth of the equipment can reach 2500 meters, fully meeting the operational requirements of deep high-temperature oil wells, and the maximum daily fluid output of a single well can reach 375m³, which can satisfy the conventional production displacement demands of most onshore and offshore high-temperature oil wells. In addition, Shengli Highland Company provides integrated complete equipment supporting services. We can supply a full range of essential supporting equipment as required, including surface drive devices, tubing torque anchors, blowout preventers, and sucker rod centralizers. With high equipment compatibility and complete supporting configuration, we can provide one-stop supply and integrated installation and commissioning services, effectively ensuring the long-term efficient, stable and safe operation of the entire oil production system, and providing reliable equipment support for stable and high-yield production of high-temperature oil wells in oilfields.