Granted Patent B1

US 7,654,327 · App. 12/203,002 · Granted Feb 2, 2010

Abstract

Claims (45)

1. A tensioner assembly for moveably carrying a conductor that supports a riser connected from a wellhead to a piece of well access equipment on a rig comprising:

a. a support frame;

b. at least one hydraulic cylinder connected to the support frame;

c. at least one primary accumulator in fluid communication with the at least one hydraulic cylinder;

d. an upper conductor guide and a lower conductor guide slidably contacting the conductor;

e. a tension frame secured to the conductor between the upper and the lower conductor guides for transferring tension from the at least one hydraulic cylinder to the conductor; and

f. a tension ring assembly disposed on the conductor above the upper conductor guide.

2. The tensioner assembly of claim 1 , wherein the support frame comprises:

a. a first beam connected to the rig and parallel to a second beam connected to the rig; wherein the first beam has a pad eye for supporting the at least one hydraulic cylinder, and wherein the second beam has another pad eye for supporting the at least one hydraulic cylinder.

3. The tensioner assembly of claim 1 , wherein the support frame is a cassette frame.

4. The tensioner assembly of claim 1 , wherein the upper and lower conductor guides each comprise a guide frame for supporting a conductor guide wear pad using a conductor guide retaining ring.

5. The tensioner assembly of claim 4 , wherein the conductor guide wear pads comprise an ultra high molecular weight polymer, a metallic bearing material, a composite comprising a ceramic, glass, or combinations thereof.

6. The tensioner assembly of claim 1 , wherein the tension frame is removably connected to the conductor.

7. The tensioner assembly of claim 1 , wherein the tension ring assembly is a tapered bowl tension ring assembly comprising:

(i) a tension disc having a tapered center, wherein the tension disc supports the load from the riser to the conductor;

(ii) tapered collets for engaging the tapered center, wherein the tapered collets secure to the riser; and

(iii) a collet support ring disposed on the tapered collets for supporting the tapered collets.

8. The tensioner assembly of claim 1 , wherein the tension ring assembly comprises a single tension disc directly engaging the conductor, and supporting the riser.

9. A tensioner assembly for moveably carrying a conductor that supports a riser connected from a wellhead to a piece of well access equipment on a rig comprising:

a. a support frame;

b. at least one hydraulic cylinder connected to the support frame;

c. at least one primary accumulator in fluid communication with the at least one hydraulic cylinder;

d. an upper conductor guide and a lower conductor guide engaged with the conductor; wherein the upper and lower conductor guides each comprise a guide frame for supporting a conductor guide wear pad using a conductor guide retaining ring;

e. a tension frame secured to the conductor between the upper and the lower conductor guides; and

f. a tension ring assembly disposed on the conductor above the upper conductor guide.

10. The tensioner assembly of claim 9 , wherein the support frame comprises:

a. a first beam connected to the rig and parallel to a second beam connected to the rig; wherein the first beam has a pad eye for supporting the at least one hydraulic cylinder, and wherein the second beam has another pad eye for supporting the at least one hydraulic cylinder.

11. The tensioner assembly of claim 9 , wherein the support frame is a cassette frame.

12. The tensioner assembly of claim 9 , wherein the primary accumulator is connected to the hydraulic cylinder by a conduit, an umbilical, or a jumper.

13. The tensioner assembly of claim 9 , wherein the conductor guide wear pads comprise an ultra high molecular weight polymer, a metallic bearing material, a composite comprising a ceramic, glass, or combinations thereof.

14. The tensioner assembly of claim 9 , wherein the tension frame is removably connected to the conductor.

15. A tensioner assembly for moveably carrying a conductor that supports a riser connected from a wellhead to a piece of well access equipment on a rig comprising:

a. a support frame;

b. at least one hydraulic cylinder connected to the support frame;

c. at least one primary accumulator in fluid communication with the at least one hydraulic cylinder;

d. a first beam connected to the rig, wherein the first beam has a pad eye for supporting the at least one hydraulic cylinder;

e. a second beam connected to the rig parallel to the first beam, wherein the second beam has another pad eye for supporting the at least one hydraulic cylinder;

f. an upper conductor guide and a lower conductor guide disposed about the conductor;

g. a tension frame secured to the conductor between the upper and the lower conductor guides; and

h. a tension ring assembly disposed on the conductor above the upper conductor guide.

16. The tensioner assembly of claim 15 , wherein the primary accumulator is connected to the hydraulic cylinder by a conduit, an umbilical, or a jumper.

17. The tensioner assembly of claim 15 , wherein the support frame is a cassette frame.

18. The tensioner assembly of claim 15 , wherein the upper and lower conductor guides each comprise a guide frame for supporting a conductor guide wear pad using a conductor guide retaining ring.

19. The tensioner assembly of claim 18 , wherein the conductor guide wear pads comprise an ultra high molecular weight polymer, a metallic bearing material, a composite comprising a ceramic, glass, or combinations thereof.

20. The tensioner assembly of claim 15 , wherein the tension frame is removably connected to the conductor.

Assignments (9)