IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0439320
(2012-04-04)
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등록번호 |
US-9091129
(2015-07-28)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
18 |
초록
▼
An injector head used in coiled tubing systems including at least two opposed counter-rotating chain loops having a first end and a second end, the chain loops having a chain. The injector head further includes a fixed drive sprocket disposed at the first end of a chain loop and a floating sprocket
An injector head used in coiled tubing systems including at least two opposed counter-rotating chain loops having a first end and a second end, the chain loops having a chain. The injector head further includes a fixed drive sprocket disposed at the first end of a chain loop and a floating sprocket disposed at the second end of the chain loop. In the injector head, there is a force applied to the floating bottom sprocket to maintain the chain loop at a desired chain tension. Additionally, the injector head includes a tension cylinder that automatically maintains the chain loop at the desired chain tension.
대표청구항
▼
1. An injector head used in coiled tubing systems comprising: a. at least two opposed counter-rotating chain loops having a first end and a second end, the chain loops comprising a chain;b. a fixed drive sprocket disposed at the first end of a chain loop and a floating sprocket disposed at the secon
1. An injector head used in coiled tubing systems comprising: a. at least two opposed counter-rotating chain loops having a first end and a second end, the chain loops comprising a chain;b. a fixed drive sprocket disposed at the first end of a chain loop and a floating sprocket disposed at the second end of the chain loop;c. a force applied to the floating sprocket disposed at the second end of the chain loop to maintain the chain loop at a desired chain tension; andd. a tension cylinder that automatically maintains the chain loop at the desired chain tension, wherein the tension cylinder further comprises:e. a cylinder head and a cylinder head seal;f. a rod and a rod seal;g. a rod wiper;h. a cylinder barrel;i. a retainer;j. a piston seal;k. a piston and a cylinder, wherein the piston divides the cylinder into at least two chambers, a first chamber and a second chamber, each chamber comprising a piston area, and wherein the piston area is substantially the same in the first and second chambers; andl. a check valve connecting the first and second chambers, wherein the check valve allows fluid and pressure to pass from the first chamber to the second chamber. 2. The injector head according to claim 1, further comprising a mechanical stop to prevent the floating sprocket disposed at the second end of the chain loop from moving toward the first end of the chain loop. 3. The injector head according to claim 1, wherein the tension cylinder further comprises a cylinder barrel, a cylinder head, a piston, and a rod. 4. The injector head according to claim 3, wherein a connection between the piston and rod allows the tension cylinder to automatically adjust a tension of the chain loop. 5. The injector head according to claim 3, wherein the tension cylinder further comprises a biasing member that engages the rod and the piston. 6. The injector head according to claim 5, wherein the biasing member allows the tension cylinder to automatically adjust a tension of the chain loop. 7. The injector head according to claim 5, wherein the biasing member is a spring. 8. The injector head according to claim 1, further comprising: a. sprocket shafts engaged with the floating sprocket disposed at the second end of the chain loop, wherein the rod is engaged with the sprocket shafts and the rod is coupled with the piston by the retainer; andb. a biasing member mounted between the piston and the rod, wherein the biasing member maintains a distance substantially equivalent to a chordal movement of the chain on the sprockets,c. wherein the tension cylinder further comprises two ports, a first port and a second port, wherein the first port is connected to a chain tension pressure control valve,d. wherein the first port bleeds air from the cylinder, and the second port is plugged during operation of the injector head,e. wherein forces from the chain tension push the rod against the floating sprocket in the chain loop,f. wherein if forces push the floating sprocket toward the first end of the chain loop, the rod will travel a distance substantially equal to the distance maintained by the biasing member, andg. wherein the floating sprocket is prevented from moving past a location of the piston in the cylinder. 9. The injector head according to claim 8, further comprising a relief valve installed at the second port. 10. The injector head according to claim 1, further comprising sprocket shafts engaged with the floating sprocket disposed at the second end of the chain loop, wherein the rod includes slots cut into an end of the rod, the rod is engaged with the sprocket shafts, and the rod is coupled with the piston by the retainer. 11. The injector head according to claim 1, further comprising rollers that are engaged with the chain and move with the chain. 12. The injector head according to claim 1, further comprising floating/moving traction cylinders. 13. The injector head according to claim 1, further comprising stationary traction cylinders. 14. A method of automatically adjusting the tension of a chain in an injector head used in coiled tubing systems comprising: a. applying a force to a floating sprocket to maintain a chain loop at a desired chain tension, wherein the injector head comprises: i. at least two opposed counter-rotating chain loops having a first end and a second end, the chain loops comprising a chain; andii. a fixed drive sprocket disposed at the first end of the chain loop, wherein the floating sprocket is disposed at the second end of the chain loop;b. preventing the floating sprocket disposed at the second end of the chain loop from moving toward the first end of the chain loop using a mechanical stop; andc. automatically maintaining the chain loop at the desired chain tension using a tension cylinder, wherein the tension cylinder comprises:d. a cylinder head and a cylinder head seal;e. a rod and a rod seal;f. a rod wiper;g. a cylinder barrel;h. a retainer;i. a piston seal;j. a piston and a cylinder, wherein the piston divides the cylinder into at least two chambers, a first chamber and a second chamber, each chamber comprising a piston area, and wherein the piston area is substantially the same in the first and second chambers; andk. a check valve connecting the first and second chambers, wherein the check valve allows fluid and pressure to pass from the first chamber to the second chamber. 15. The method of claim 14, wherein the tension cylinder further comprises a cylinder barrel, a cylinder head, a piston, and a rod, and wherein a connection between the piston and rod allows the tension cylinder to automatically adjust a tension of the chain loop. 16. The method of claim 15, wherein the tension cylinder further comprises a biasing member that engages the rod and the piston, and wherein the biasing member allows the tension cylinder to automatically adjust a tension of the chain loop. 17. The method of claim 14, wherein the injector head further comprises rollers that are engaged with the chain and move with the chain. 18. The method of claim 14, wherein the injector head further comprises floating/moving traction cylinders. 19. An injector head used in coiled tubing systems comprising: a. at least two opposed counter-rotating vertical chain loops having a top and a bottom, the chain loops comprising a chain;b. a fixed drive sprocket at the top of a vertical chain loop and a floating sprocket at the bottom of the vertical chain loop;c. a force applied to the floating sprocket at the bottom of the vertical chain loop to keep the chain loop tight thereby creating a desired chain tension;d. a mechanical stop to prevent the floating sprocket at the bottom of the vertical chain loop from moving toward the top of the vertical chain loop;e. a tension cylinder that automatically maintains the chain loop at the desired chain tension, the tension cylinder further comprising: i. a cylinder barrel;ii. a cylinder head and a cylinder head seal;iii. a rod and a rod seal;iv. a rod wiper;v. a retainer ring;vi. a floating piston and a cylinder, wherein the piston divides the cylinder into two chambers, a first chamber and a second chamber, each chamber comprising a piston area, and wherein the piston area is substantially the same in the first and second chambers;vii. a spring mounted between the piston and the rod, wherein the spring maintains a distance substantially equivalent to chordal movement of the chain on the sprockets;viii. a piston seal;ix. a check valve connecting the first and second chambers, wherein the check valve allows fluid and pressure to pass from the first chamber to the second chamber, but the check valve does not allow fluid and pressure to pass from the second chamber to the first chamber; andx. two ports, a first port and a second port, wherein the first port is connected to a chain tension pressure control valve, and wherein the first port bleeds air from the cylinder, and the second port is plugged during operation of the injector head;f. sprocket shafts engaged with the floating sprocket at the bottom of the vertical chain loop, wherein the rod includes slots that are cut into an end of the rod, the rod is connected to the sprocket shafts, and the rod is connected to the piston with the retainer ring;g. rollers that are engaged with the chain and move with the chain;h. floating/moving traction cylinders,i. wherein forces from the chain push the rod against the floating sprocket in the chain loop,j. wherein if forces push the floating sprocket toward the top of the chain loop, the rod will travel a distance substantially equal to the distance maintained by the biasing member, andk. wherein the floating sprocket is prevented from moving past a location of the piston in the cylinder.
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