Fluid-guiding and electric conducting system for suspended electric submersible progressing cavity pump (PCP)
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01C-001/10
F01C-005/00
F03C-002/00
F04C-002/00
출원번호
UP-0171360
(2008-07-11)
등록번호
US-7780428
(2010-09-13)
우선권정보
CN-2006 1 0013297(2006-03-14)
발명자
/ 주소
Zhao, Xihuan
Zhang, Ruiqi
대리인 / 주소
Matthias Scholl P.C.
인용정보
피인용 횟수 :
0인용 특허 :
6
초록▼
A fluid-guiding and electric conducting system for a suspended electric submersible PCP comprises a fluid-guiding system and an electric conducting system. The fluid-guiding system comprises an upper connector, a protector, a fluid-guiding sleeve, a driving mechanism, a shaft coupling, a first annul
A fluid-guiding and electric conducting system for a suspended electric submersible PCP comprises a fluid-guiding system and an electric conducting system. The fluid-guiding system comprises an upper connector, a protector, a fluid-guiding sleeve, a driving mechanism, a shaft coupling, a first annular cavity, a second annular cavity, a third annular cavity, a fourth annular cavity, and a fluid outlet. The first annular cavity, the second annular cavity, the third annular cavity, the fourth annular cavity, and the fluid outlet are connected orderly to the well fluid pipe. The electric conducting system comprises a motor lead wire, a center hole of the protector, a fifth annular cavity, and a wire outlet. The fluid-guiding and electric conducting system has the advantages of simple structure, low manufacturing cost, easy assembly and inexpensive maintenance.
대표청구항▼
What is claimed is: 1. 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 ou
What is claimed is: 1. 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 (9e), a second annular cavity (9c), a third annular cavity (8), a fourth annular cavity (5), and a fluid outlet (3a); said shaft coupling (9) comprises a bearing shell (9d) having an outer circumferential surface, an outer sleeve (9a) having an inner circumferential surface, and a flexible shaft (9b) having an outer circumferential surface; said first annular cavity (9e) is formed between the outer circumferential surface of the bearing shell (9d) of the shaft coupling (9) and the inner circumferential surface of the outer sleeve (9a) of the shaft coupling (9); said second annular cavity (9c) is formed between the inner circumferential surface of the outer sleeve (9a) of the shaft coupling (9) and the outer circumferential surface of the flexible shaft (9b); 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 (3a) is formed at the core portion of the upper connector (3); said first annular cavity (9e), said second annular cavity (9c), said third annular cavity (8), said fourth annular cavity (5), and said fluid outlet (3a) are connected orderly to a well fluid pipe (1); said electric conducting system comprises a motor lead wire (7b), a center hole (6c) of the protector (6), a fifth annular cavity (6a), and a wire outlet (3b); said center hole (6c) of said protector (6) is formed at the core portion of the protector (6); said fifth annular cavity (6a) is formed above the core of the protector (6); said wire outlet (3b) is formed at the core of the upper connector (3); said center hole (6c) of the protector (6) and the fifth annular cavity (6a) are connected orderly to the wire outlet (3b); and one end of said motor lead wire (7b) is led out of an inner cavity (7a) of the motor, the other end of said motor lead wire (7b) is entered into the fifth annular cavity (6a) by passing through the center hole (6c) of the protector (6) and is coiled in multiple turns therein, and then is led out through the wire outlet (3b) at the core of the upper connector (3). 2. The system of claim 1, wherein said upper connector (3) is set up at an upper end of the suspended electric submersible PCP; said fluid outlet (3a) and said wire outlet (3b) are through holes running in a vertical direction, are separated from each other, and are formed at said core of said upper connector; an upper end of said fluid outlet (3a) is connected with a bottom end of the well fluid pipe (1); a lower end of said fluid outlet (3a) is connected with the fourth annular cavity (5); an upper end of said wire outlet (3b) is connected with a cable joint (2); a lower end of said wire outlet (3b) is connected tightly with said fifth annular cavity (6a) above the protector (6); and a lower end of said upper connector (3) is connected with the fluid-guiding sleeve (4) and an upper end of a shell of said protector (6). 3. The system of claim 1, wherein said core portion of said protector (6) is formed with a center hole (6c) hermetically separated from an inner cavity of said protector (6); an upper end of said center hole (6c) is formed with said fifth annular cavity (6a); a lower end of said center hole (6c) is connected with an upper end of said motor inner cavity (7a) of said driving mechanism (7); said fourth annular cavity (5) is formed between said outer circumferential surface of said protector (6) and an inner wall of said fluid-guiding sleeve (4); and a lower end of a shell of said protector (6) is connected tightly with an upper end of a shell of said driving mechanism (7). 4. The system of claim 1, wherein said driving mechanism (7) is established inside said fluid-guiding sleeve (4); an upper end of a shell of said driving mechanism is connected with a lower end of a shell of said protector (6); and said third annular cavity (8) is formed between an inner wall of said fluid-guiding sleeve (4) and said outer circumferential surface of said driving mechanism (7). 5. The system for claim 1, wherein said fluid-guiding sleeve (4) is in a shape of a cylinder; an upper end of said fluid-guiding sleeve is connected tightly with a lower end of the upper connector (3); and said fluid guiding sleeve (4) hermetically separates said fourth annular cavity (5) and said third annular cavity (8) from external environment. 6. The system of claim 1, wherein an upper end of said outer sleeve (9a) is connected tightly with a lower end of said fluid-guiding sleeve (4); a lower end of said outer sleeve (9a) is connected tightly with an upper end of a shell of the PCP (10); the second annular cavity (9c) is formed between said inner circumferential surface of said outer sleeve (9a) and said outer circumferential surface of the flexible shaft (9b); said outer sleeve (9a) serves to hermetically separate said second annular cavity (9c) from external environment; an upper end of said flexible shaft (9b) is connected with an output shaft of said driving mechanism (7); a lower end of said flexible shaft (9b) is connected with an upper end of the rotor of the PCP (10); and said first annular cavity (9e) is formed between said outer circumferential surface of said bearing shell (9d) and said inner circumferential surface of the outer sleeve (9a). 7. The system of claim 1, wherein the bearing shell (9d) at the lower journal of the flexible shaft (9b) and the outer sleeve (9a) relative to the bearing shell (9d) position forms a plain bearing; and the difference between the outer diameter of the bearing shell (9d) and the inner diameter of the outer sleeve (9a) relative to the bearing shell (9d) position is proportional to the eccentricity E of the PCP (10).
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