Bladder type crimper

1. A crimper for crimping an oilfield accessory to an oilfield tubular, comprising:

a ring-shaped body comprising a cavity; and

a bladder assembly disposed within the cavity, wherein the bladder assembly comprises an elastic bladder and a plurality of fingers arrayed about opposite ends of the elastic bladder, wherein the ring-shaped body and the bladder assembly are configured to be disposed about the oilfield tubular and pressurized to crimp the oilfield accessory to the oilfield tubular.

2. The crimper of claim 1 , wherein the ring-shaped body comprises end caps removably coupled to the ring-shaped body, wherein each of the end caps comprises inner surfaces configured to engage with the plurality of fingers.

3. The crimper of claim 2 , wherein the inner surfaces have a curved profile, and each of the plurality of fingers has a curved profile.

4. The crimper of claim 1 , wherein the plurality of fingers are cast into the elastic bladder.

5. The crimper of claim 1 , wherein the ring-shaped body comprises a port configured to flow a fluid into the cavity.

6. The crimper of claim 5 , comprising a hydraulic power pack configured to supply the fluid, wherein the fluid is a hydraulic fluid or oil.

7. The crimper of claim 1 , wherein the elastic bladder comprises a rubber.

8. The crimper of claim 1 , wherein the elastic bladder comprises a plurality of lips configured to engage with an inner surface of the ring-shaped body to form a plurality of seals.

9. The crimper of claim 1 , wherein the plurality of fingers comprises a metal.

10. A system for crimping an oilfield accessory to an oilfield tubular, comprising:

a cylindrical body, comprising:

a cavity;

a port extending from an exterior of the cylindrical body to the cavity; and

end caps removably coupled to opposite ends of the cylindrical body; and

a bladder assembly disposed within the cavity of the cylindrical body, comprising:

a cylindrical bladder;

a first plurality of fingers arrayed about a first end of the cylindrical bladder; and

a second plurality of fingers arrayed about a second end of the cylindrical bladder, wherein the cylindrical body and the bladder assembly are configured to be disposed about the oilfield tubular, and the bladder assembly is configured to abut the oilfield tubular upon pressurization to crimp the oilfield accessory to the oilfield tubular.

11. The system of claim 10 , wherein the first and second pluralities of fingers are cast into the cylindrical bladder.

12. The system of claim 11 , wherein the cylindrical bladder comprises a rubber, and the first and second pluralities of fingers comprise steel.

13. The system of claim 10 , wherein the cylindrical bladder comprises a plurality of protrusions configured to contact an inner surface of the cylindrical body, wherein the plurality of protrusions are configured to create a plurality of pressure seals within the cavity.

14. The system of claim 10 , comprising a hydraulic pump configured to flow a fluid into the cavity through the port.

15. The system of claim 14 , wherein the fluid is a hydraulic fluid or oil.

16. The system of claim 10 , wherein each of the end caps comprises a curved inner surface, and each the first and second pluralities of fingers comprises a distal end having a curved profile, wherein each of the distal ends of the first or second pluralities of fingers is configured to engage with the curved inner surface of one of the end caps.

17. The system of claim 10 , wherein the oilfield accessory is a casing accessory and wherein the oilfield tubular is a casing, and wherein the casing accessory is disposed about the casing.

18. A method for crimping an oilfield tubular accessory to an oilfield tubular, comprising:

positioning a crimper about the oilfield tubular accessory to be secured to the oilfield tubular;

pumping a fluid in a cavity of a crimper body;

applying a radially inward force to the oilfield tubular accessory with a plurality of fingers of a bladder assembly disposed within the cavity of the crimper body, said force crimping the oilfield accessory to the oilfield tubular;

draining the fluid from the cavity; and

removing the crimper from the oilfield tubular accessory.

19. The method of claim 18 , wherein applying the radially inward force to the oilfield tubular accessory with the plurality of fingers of the bladder assembly disposed within the cavity of the crimper body comprises expanding an elastic portion of the bladder assembly coupled to the plurality of fingers in an axial direction and directing the plurality of fingers radially inward with end caps of the crimper body.

20. The method of claim 18 , wherein pumping the fluid in the cavity of the crimper body comprises pumping a hydraulic fluid or oil through a port of the crimper body with a hydraulic power pack.