A sealing device for electric submersible reciprocating pump oil production system
An oil production system and sealing device technology, which is applied to the components, pumps, and pump components of the pumping device for elastic fluids, can solve the problems affecting the service life of the oil production system, the failure of the dynamic seal, and the burning of the motor, so as to ensure no The effect of downtime
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Embodiment 1
[0028] This embodiment provides a sealing device for an electric submersible reciprocating pump oil recovery system, such as figure 1 As shown, it includes the electric submersible reciprocating pump cylinder 1, the oil well pump pull rod 2 inside the electric submersible oil reciprocating pump cylinder 1, and also includes a linear motor, the lower end of the oil well pump pull rod 2 is connected to the upper end of the upper pull rod 6 of the linear motor, and the linear motor The lower end of the motor outer cylinder 5 is connected with a plug 11;
[0029] The outer wall of the upper part of the upper tie rod 6 is covered with an upper bellows 4, and an upper bellows protection pipe 3 is arranged outside the upper bellows 4. The lower end is connected to the upper end of the motor outer cylinder 5, and the upper and lower ends of the upper bellows protection pipe 3 are respectively connected to the lower end of the electric submersible reciprocating pump cylinder 1 and the ...
Embodiment 2
[0033]The connection relationship in the above-mentioned embodiment 1 may be the case in this embodiment: a first flange is provided at the connection between the pull rod 2 of the oil well pump and the upper rod 6, and a second flange is provided at the upper end of the motor outer cylinder 5. The upper and lower ends of the upper bellows 4 are respectively connected to the first flange and the second flange; the lower end of the motor tail pipe 7 is provided with a third flange, and the lower end of the lower rod 10 is provided with a fourth flange. The upper and lower ends of the lower bellows 9 are respectively connected to the third flange and the fourth flange.
[0034] The flanges are respectively connected to the upper and lower rods of the submersible linear motor, and the flanges connected to the bellows are also used as the support of the corrugated protective tube to prevent the corrugated tube from directly contacting the corrugated protective tube and damaging the...
Embodiment 3
[0037] The peripheral protection pipe column in the above-mentioned embodiment 1 has the following structure in this embodiment. The upper end of the inner wall of the upper bellows protection pipe 3 is threaded to the lower end of the outer wall of the electric submersible reciprocating pump cylinder 1. The upper bellows The lower end of the protective pipe 3 is connected to the upper end of the motor outer cylinder 5 by bolts, the upper end of the inner wall of the lower bellows protective pipe 8 is threaded to the lower end of the outer wall of the motor tail pipe 7, and the lower end of the outer wall of the lower bellows protective pipe 8 is threaded to the plug 11 the upper end of the inner wall.
[0038] This structure guarantees the working environment of the upper bellows 4 and the lower bellows 9, making them less susceptible to interference from the external well fluid environment, more able to ensure long-term operation of the equipment, and prolonging its service l...
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