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In the field of industrial fluid delivery, pumps, as key power equipment, support the operation of multiple industries. According to the basic theory classification of pumps, its core types can be divided into three categories according to the working principle: positive displacement pumps, dynamic pumps and other types of pumps.

The essential difference between downhole pumps and drilling pumps begins with the differentiation of application fields.Drilling pumps are mainly used in clear water extraction scenarios such as agricultural irrigation and industrial water supply.

In the process of oil extraction, the extraction of sand-containing wells has always been a difficult problem in the industry. When sand enters the interior of the oil pump, it will cause wear and tear, plunger stagnation and other failures.

In the field of petroleum extraction equipment, API standards are the core yardstick for measuring product performance. As an enterprise focusing on the research and development of petroleum rod pumps and pipe pumps, Dongsheng Petroleum relies on the API 11AX standard to build API type rod pumps.

API type rod pump strictly follows the API Spec 11AX standard of the American Petroleum Institute, from the size specification of the plunger diameter of 1.0625-3.75 inches to the structural requirements of the X-type thin-walled pump cylinder, there is a clear technical definition. As an API 11AX certified company, Tieling Dongsheng's API type rod pump can be directly connected to the procurement standards of large oil fields such as PetroChina and Sinopec.

In the field of petroleum extraction, the rod pump oil recovery system has become the most widely used manual lifting method due to its high adaptability, simple structure and easy maintenance. As the core equipment of the system, API tubing pump occupies an important position.

Downhole sucker rod pump generally refers to a plunger-type oil pump driven by the reciprocating movement of the sucker rod up and down. It is the key underground equipment of the rod pumping system. It is mainly composed of four parts: pump cylinder, plunger, fixed valve and swimming valve. When working, the ground pumping unit drives the plunger up and down through the pumping rod.

RWA Insert Rod Pump is a rod-type oil pump designed according to API SPEC 11AX (or GB/T18607) standard. According to the support and fixed form of the pump, it can be divided into three categories: moving cylinder type bottom fixed rod type oil pump (RWT or RHT), fixed cylinder type bottom fixed rod type oil pump (RWB or RHB or RXB), fixed cylinder type top fixed rod type oil pump (RWA or RHA).

Maintaining efficient and stable crude oil production in environments with sand content, low liquid levels, deviated wells, and intermittent production has become a focus of industry attention. As a core piece of equipment in traditional mechanical oil production, the insert rod pump exhibits wide adaptability due to its diverse structural configurations. Among them, the top-fixed insert rod pump with a fixed barrel, the bottom-fixed insert rod pump with a fixed barrel, and the bottom-fixed insert rod pump with a moving barrel each play an important role in different operating conditions due to their unique structural advantages.

In the previous article, we discussed the RHA Insert Rod Pump. This article will explain the definition, model description, technical specifications, structural components, operating principle, application scenarios, comparison with other pump types, and installation methods of the TH tubing pump.