Patent ID: 7780428

Claim:
A fluid-guiding and electric conducting system for a suspended electric submersible PCP, comprising a fluid-guiding system and an electric conducting system, wherein said fluid-guiding system comprises an upper connector ( 3 ) having a core portion, a protector ( 6 ) having an outer circumferential surface, a fluid-guiding sleeve ( 4 ) having an inner circumferential surface, a driving mechanism ( 7 ) having an outer circumferential surface, a shaft coupling ( 9 ), a first annular cavity ( 9 e ), a second annular cavity ( 9 c ), a third annular cavity ( 8 ), a fourth annular cavity ( 5 ), and a fluid outlet ( 3 a ); said shaft coupling ( 9 ) comprises a bearing shell ( 9 d ) having an outer circumferential surface, an outer sleeve ( 9 a ) having an inner circumferential surface, and a flexible shaft ( 9 b ) having an outer circumferential surface; said first annular cavity ( 9 e ) is formed between the outer circumferential surface of the bearing shell ( 9 d ) of the shaft coupling ( 9 ) and the inner circumferential surface of the outer sleeve ( 9 a ) of the shaft coupling ( 9 ); said second annular cavity ( 9 c ) is formed between the inner circumferential surface of the outer sleeve ( 9 a ) of the shaft coupling ( 9 ) and the outer circumferential surface of the flexible shaft ( 9 b ); said third annular cavity ( 8 ) is formed between the inner circumferential surface of the fluid-guiding sleeve ( 4 ) and the outer circumferential surface of the driving mechanism ( 7 ); said fourth annular cavity ( 5 ) is formed between the outer circumferential surface of the protector ( 6 ) and the inner circumferential surface of the fluid-guiding sleeve ( 4 ); said fluid outlet ( 3 a ) is formed at the core portion of the upper connector ( 3 ); said first annular cavity ( 9 e ), said second annular cavity ( 9 c ), said third annular cavity ( 8 ), said fourth annular cavity ( 5 ), and said fluid outlet ( 3 a ) are connected orderly to a well fluid pipe ( 1 ); said electric conducting system comprises a motor lead wire ( 7 b ), a center hole ( 6 c ) of the protector ( 6 ), a fifth annular cavity ( 6 a ), and a wire outlet ( 3 b ); said center hole ( 6 c ) of said protector ( 6 ) is formed at the core portion of the protector ( 6 ); said fifth annular cavity ( 6 a ) is formed above the core of the protector ( 6 ); said wire outlet ( 3 b ) is formed at the core of the upper connector ( 3 ); said center hole ( 6 c ) of the protector ( 6 ) and the fifth annular cavity ( 6 a ) are connected orderly to the wire outlet ( 3 b ); and one end of said motor lead wire ( 7 b ) is led out of an inner cavity ( 7 a ) of the motor, the other end of said motor lead wire ( 7 b ) is entered into the fifth annular cavity ( 6 a ) by passing through the center hole ( 6 c ) of the protector ( 6 ) and is coiled in multiple turns therein, and then is led out through the wire outlet ( 3 b ) at the core of the upper connector ( 3 ).