Layered oil production device with double electric submersible pumps sharing power line

Abstract

The invention relates to a layered oil production device with double electric submersible pumps sharing a power line. According to the technical scheme, a lower-layer starting switch and a lower-layerelectric submersible pump are arranged below a lower-layer cable passing packer, and an upper-layer electric submersible pump, an upper-layer starting switch and a phase compensator are arranged between the lower-layer cable passing packer and an upper-layer cable passing packer; and a second power cable of the lower-layer electric submersible pump is upwards connected to a first power cable of the upper-layer electric submersible pump in parallel along the lower-layer cable passing packer, and a lower-layer starting switch control line of the lower-layer electric submersible pump moves alongthe lower-layer cable passing packer, the upper-layer cable passing packer, and penetrates through a threading hole of a large four-way joint of a wellhead with an upper-layer starting switch controlline. The layered oil production device with the double electric submersible pumps sharing the power line has the advantages that the structure of an underground power cable is simplified, the problem that a cable passing packer with an eccentric structure cannot penetrate into two sets of power cables is solved, the purpose that the two electric submersible pumps are used for underground layeredoil production is achieved, oil production layers are clearer, production allocation is achieved through electric control, and efficient oil production is achieved.

Description

technical field [0001] The invention relates to an electric submersible pump oil production device and method, in particular to a layered oil production device with two electric submersible pumps sharing a power line. Background technique [0002] In oil extraction, electric submersible pumps are widely used because of their high efficiency, stability, energy saving and reliability, but in layered oil production, because it is difficult to realize the use of multiple electric submersible pumps, their application This limitation is mainly manifested in the following: (1) Limitation of the cable-passing packer: most of the cable-passing packers currently use the cable-passing packer produced by the American Shell Company. This tool adopts an eccentric structure (including the The oil channel, cable channel, air outlet channel and control line channel generally require a larger oil channel, which causes the entire device to form an eccentric structure, and the space on one side...

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Problems solved by technology

[0002] In oil extraction, electric submersible pumps are widely used because of their high efficiency, stability, energy saving and reliability, but in layered oil production, because it is difficult to realize the use of multiple electric submersible pumps, their application This limitation is mainly manifested in the following: (1) Limitation of the cable-passing packer: most of the cable-passing packers currently use the cable-passing packer produced by the American Shell Company. This tool adopts an eccentric structure (including the The oil channel, cable channel, air outlet channel and control line channel generally require a larger oil channel, which causes the entire device to form an eccentric structure, and the space on one side of the cable channel, air outlet channel and control line channel is limited. Adding multiple cable passages will limit the space of downhole pipelines, and the size of the cable packer cannot be enlarged. Therefore, it is impossible to realize the parallel crossing of multiple power cables; (2) The cost of power cables is relatively high: because the power cables are all Specially made, high cost and other factors, in view of the above situation, the invention and implementation of multiple electric submersible pumps share a power line to pass through the cable packer, which can solve the above problems well

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