Petroleum Exploration and Development >

2019 , Vol. 46 >Issue 3: 621 - 628

DOI: https://doi.org/10.1016/S1876-3804(19)60042-X

Submersible direct-drive progressing cavity pump rodless lifting technology

  • Zhongxian HAO ,
  • Shijia ZHU ,
  • Xiaohan PEI ,
  • Peng HUANG ,
  • Zheng TONG ,
  • Benyuan WANG ,
  • Deyin LI
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  • 1. Research Institute of Exploration & Development, PetroChina, Beijing 100083, China
    2. PetroChina Jilin Oilfield Company, Songyuan 138000, China
    3. Xiafeng Electric Equipment Co., Ltd., Xinxiang 453621, China

Received date: 2018-09-13

  Revised date: 2019-02-13

  Online published: 2019-07-03

Supported by

Supported by the PetroChina Science and Technology Project.(2016B-4104)

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Abstract

Submersible electrical motor direct-drive progressing cavity pump (PCP) rodless lifting was studied to solve the traditional rod-drive pump problems, such as rod-tubing wearing, low efficiency and short running time. The theoretical researches and laboratory experiments of key tools such as submersible motor and the construction technology of lifting system were introduced. The field application and economic benefit were analyzed and compared with the traditional rod pumping unit. A new low speed and large torque permanent magnet synchronous motor was developed. This motor was used to drive PCP without gear reducer, which improved the reliability and feasibility. It can run at the speed from 50 to 500 r/min with stepless speed regulation, and it can perform high efficiency and large torque. Besides, other key supporting tools, such as motor protector and flex shaft, were developed. The submersible electrical motor direct-drive PCP technology can be used in a 139.7 mm (5.5 in) casing well, with daily output ranging from 5 to 50 m 3. Until now, the technology has been deployed more than 100 wells. The field application results show that it eliminates the rod-tubing wearing and saves electric energy by more than 30% compared with the traditional rod pumping unit. And it also makes the oil produced in a safe and environmental friendly way.

Key words： rodless artificial lift; submersible motor direct-drive; progressing cavity pump; submersible motor; artificial lift

Cite this article

Zhongxian HAO , Shijia ZHU , Xiaohan PEI , Peng HUANG , Zheng TONG , Benyuan WANG , Deyin LI . Submersible direct-drive progressing cavity pump rodless lifting technology[J]. Petroleum Exploration and Development, 2019 , 46(3) : 621 -628 . DOI: 10.1016/S1876-3804(19)60042-X

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