Machine and pump integrated submersible direct drive screw pump oil extraction device and method

A technology for oil production equipment and screw pumps, which is applied in the direction of pumps, pump components, and production fluids, etc. It can solve the problems of poor unit passability, low productivity of a single well, and inability to trip and repair wells, so as to reduce one-time investment and maintenance Strong adaptability to cost and well conditions, and the effect of improving passability

Pending Publication Date: 2018-01-23
PETROCHINA CO LTD
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Problems solved by technology

[0002] (1) In recent years, the oil wells are mainly deviated wells and directional wells, the horizontal displacement increases, the wellbore trajectory is complex, and there are problems such as serious partial wear of tubing rods, high energy consumption, and high operation and maintenance costs; (2) for low permeability , ultra-low permeability and ultra-low permeability reservoirs, single well productivity i

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  • Machine and pump integrated submersible direct drive screw pump oil extraction device and method

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0023] see figure 1 , the machine-pump integrated submersible direct-drive screw pump oil production device includes a casing 26, the upper end of the casing 26 is connected with an upper head 15, the upper head 15 is provided with an air outlet 16, and the casing 26 is provided with a motor rotor 1, the said The motor rotor 1 is connected to the power supply device through the cable 10, and the upper head 15 is provided with a threading hole for the cable 10 to pass through. The lower end is connected with a blocking member 18, the lower end of the blocking member 18 is connected with a transmission cylinder 19, the inside of the blocking member 18 is provided with a first mechanical seal 13, the inside of the transmission cylinder 19 is provided with a flexible shaft 5, and the lower end of the flexible shaft 5 is connected with a transmission joint 20, and the out...

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Abstract

The invention discloses a machine and pump integrated submersible direct drive screw pump oil extraction device and method. A motor rotor is arranged outside, a motor stator is arranged inside, and the whole is arranged in a shell in a sleeved manner. A screw pump stator and the motor stator are relatively fixed, and rotation cannot happen. After starting, the motor rotor rotates and drives a flexible shaft, and then a screw pump rotor is driven to elevate well liquid. The machine and pump integrated submersible direct drive screw pump oil extraction device and method have the beneficial effects that the displacement is small, well type adaptability is high, the structure is compact, and one-time investment can be relatively reduced; and the shaft passing performance of a unit is improved,the oil well repairing avoiding period is prolonged, and cost reducing and effect increasing are achieved.

Description

technical field [0001] The invention belongs to the technical field of oil extraction in the petroleum and natural gas industry, and in particular relates to an oil extraction device and method of a submersible direct-drive screw pump integrated with a machine and a pump. Background technique [0002] (1) In recent years, the oil wells are mainly deviated wells and directional wells, the horizontal displacement increases, the wellbore trajectory is complex, and there are problems such as serious partial wear of tubing rods, high energy consumption, and high operation and maintenance costs; (2) for low permeability , ultra-low permeability and ultra-low permeability reservoirs, single well productivity is low; (3) The unit length of the current submersible direct drive screw pump device is relatively long (more than 13 meters), for 5 1 / 2″ casing or more For oil wells with small-sized casing, the unit’s passability in the highly deviated well section is not good. If it is used...

Claims

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Application Information

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IPC IPC(8): F04C2/107F04C11/00F04C15/00E21B43/00
Inventor 张磊周志平甘庆明李佰涛杨海涛呼苏娟魏韦刘天宇辛宏
Owner PETROCHINA CO LTD
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