Clamp for cylindrical object

• US 5,711,639 A
• Filed: 02/01/1996
• Issued: 01/27/1998
• Est. Priority Date: 02/01/1996
• Status: Expired due to Term

• Current Assignee: Emerson & Cuming Composite Materials, Inc. (Advanced Innergy Limited)
• Original Assignee: Emerson & Cuming Composite Materials, Inc. (Advanced Innergy Limited)
• Inventors: Neogi, Depankar, Douglas, Craig, Tessier, Noel, Colageo, Anthony
• Primary Examiner(s): Brittain, James R.
• Assistant Examiner(s): TRAN, HANH VAN
• Application Number:
  US08/565,449
• Time in Patent Office: 726 Days
• Field of Search: 24/274, 24/285, 24/19, 24/20 LS, 24/483, 24/495, 24/908, 285/420, 285/410, 285/45, 285/373, 405/171, 441/133, 441/134
• US Class Current: 405/171
• CPC Class Codes: E21B 17/012 with buoyancy elements E21B17/015 takes precedence
• CPC Class Codes: E21B 17/1078 Stabilisers or centralisers for casing, tubing or drill pipes devices for off-center positioning E21B17/10; E21B17/1007 - E21B17/1064 take precedence
• CPC Class Codes: F16L 21/065 tightened by tangentially-arranged threaded pins
• CPC Class Codes: F16L 33/04 tightened by tangentially-arranged threaded pin and nut
• CPC Class Codes: F16L 47/06 with sleeve or socket formed by or in the pipe end
• CPC Class Codes: F16L 55/172 the ring, band or sleeve being tightened by a tangentially arranged threaded pin and a nut
• CPC Class Codes: Y10T 24/1453 Pivotal strap parts
• CPC Class Codes: Y10T 24/44239 Encircling gripping member including semirigid band and operator for tightening
• CPC Class Codes: Y10T 24/44342 having rigid linking arm pivotally connected to each gripping member

Abstract

A clamp for a cylindrical object is provided which is formed of fibers in the form of woven fabric molded in a polymeric matrix. The clamps have two free ends through which one or two rods extend. The compressive force exerted by the clamp can be adjusted by adjusting the distance between the free end.

Claims

1. Apparatus shaped to be positioned about a cylindrical object which comprises:

a clamp comprising one or two generally cylindrical shaped sections having two free ends and formed from woven polymeric fiber layers in a solid polymeric matrix, said polymeric fiber extending in a direction about a perimeter of said cylindrical object,

said free ends being joined by means for adjusting the distance between said free ends so as to adjust a compression force exerted by said clamp on said cylindrical object positioned within said clamp,

said clamp having an outside surface configured to fit with an inside surface of a buoyancy element,

said buoyancy element positioned about said clamp and having an inside surface configured to fit with said outside surface of said clamp to prevent said buoyancy element from moving along a length of said conduit.

2. The apparatus of claim 1 wherein said clamp is formed from two sections, said sections being joined together by a hinge means separate from said free ends.

3. The apparatus of claim 2 wherein said means for adjusting the distance between said free ends of said clamp comprises two rods wherein each of said rods extends through holes in one of said free ends, each of said rods having at least one through hole, and means extending through said at least one through hole for adjusting the distance between said free ends.

4. The apparatus of claim 2 wherein said hinge means of said clamp comprises a hinge rod extending through holes in each of said two sections and wherein said hinge rod is secured to inside surfaces of holes in only one of said sections.

5. The apparatus of claim 3 wherein said hinge means of said clamp comprises a hinge rod extending through holes in each of said two sections and wherein said hinge rod is secured to inside surfaces of holes in only one of said sections.

6. The apparatus of claim 1 wherein said clamp is formed of one generally cylindrical shaped section wherein said free ends have holes therein and wherein said means for adjusting the distance between said free ends comprises a diameter of a rod extending through said holes.

7. The apparatus of claim 1 wherein said outside surface is configured to include at least one key element and said inside surface includes at least one slot to fit with said at least one key element.

8. The apparatus of claim 7 including said buoyancy element formed from hollow beads selected from the group consisting of glass beads, resin beads and mixtures thereof distributed within a second polymeric matrix.

9. The apparatus of claim 1 wherein said outside surface is configured to include at least one key element and said inside surface includes at least one key element to fit with said at least one slot.

10. The apparatus of claim 9 including said buoyancy element formed from hollow beads selected from the group consisting of glass beads,resin beads and mixtures thereof distributed within a second polymeric matrix.

11. The apparatus of claim 1 including said buoyancy element formed from hollow beads selected from the group consisting of glass beads, resin beads and mixtures thereof distributed within a second polymeric matrix.

12. The clamp of any one of claims 11 or 2 wherein said polymeric matrix is an epoxy matrix.

13. The clamp of claim 12 wherein said fibers are graphite fibers.

14. The clamp of claim 12 wherein said fibers are glass fibers.

15. The clamp of claim 12 wherein said fibers are polyaramid fibers.