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1. CA2512069 - RACCORD FILETE A LIBERATION DE PRESSION

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]
CLAIMS
CLAIMS:
1. A pin and/or box thread connector having a fluid flow passage for use in relieving fluid pressure in a thread lubricant contained between threads in an engaged connection comprising a groove cut in a crest of a thread of said pin and/or said box said groove having dimensions configured to conduct said thread lubricant without reducing contact forces between the engaged threads in said connection.
2. A thread connector as defined in claim 1 wherein said groove includes an arcuate cross section.
3. A thread connector as defined in claim 1 wherein said groove is cut in said crest approximately midway between thread flanks on either side of said crest.
4. A thread connector as defined in claim 1, further comprising: a thread tooth formed by a load flank and a stab flank on either side of said crest, said load flank having a surface inclined to a central axis of said connector at a load flank angle, said stab flank having a surface inclined to a central axis of said connector at a stab flank angle, and said groove cut at a point can said crest at an intersection of said crest with a bisector of an angle defined by an intersection of a line lying within said load flank surface and a line lying within said stab flank surface.
5. A thread connector as defined in claim 4 wherein said stab flank surface includes a line inclined to said central axis at an angle of 90 degrees.
6. A thread connector as defined in claim 1 wherein said threads comprise wedge threads.
7. A thread connector as defined in claim 1 wherein said threads comprise dovetail wedge threads.
8. A thread connector as defined in claim 4 wherein at least a portion of each of said load flanks and said stab flanks is inclined to said central axis at an angle greater than 90 degrees.
9. A thread connector as defined in claim 4 wherein at least a portion of each of said load flank and said stab flank is inclined to said central axis at an angle less than 90 degrees.
10. A thread connector as defined In claim 1, further comprising: a threadedly engaged pin and box having an engaged threaded area including said thread, a thread lubricant disposed in said engaged threaded area, solid particles contained in said thread lubricant, and a lubricant escape passage defined by said fluid flow passage and said engaged pin and box in said engaged threaded area, said lubricant escape passage having a diametrical cross sectional dimension whose smallest value is greater than
the largest diametrical cross sectional dimension of the largest of said solid particles in said thread lubricant.
11. A connector as defined in claim 2, further comprising: a thread tooth formed by a load flank and a stab flank on either side of said crest, end a bevel connecting a flank of said thread with said crest of said thread tooth for forming a second fluid flow passage for use in relieving fluid pressure contained between threads in an engaged connection.
12. A Connector as defined in claim 1, further comprising multiple grooves formed in said thread crest.
13. A connector as defined in claim 11, further comprising multiple grooves formed in said thread crest.
14. A connector as defined in claim 11, further comprising a second bevel connecting a flank of said thread with said crest of said thread tooth.
15. A connector as defined in claim 10 wherein said lubricant escape passage has no diametrical cross sectional dimensions smaller than 0.006 in.
16. A pin and/or box thread connector having a fluid flow passage for use in relieving fluid pressure contain between threads in an engaged connection, comprising:
a groove cut in a crest of a thread of said pin and/or said box, a threadedly engaged pin and box having an engaged threaded area including said thread, a thread lubricant disposed in said engaged threaded area, solid particles contain in said thread lubricant, a lubricant escape passage defined by said fluid flow passage and said engaged pin and box in said engaged threaded area, said lubricant escape passage having a diametrical cross sectional dimensions whose smallest value is greater than the largest diametrical cross sectional dimensions of the largest of said solid particles in said thread lubricant, and a seal area, intermediate ends of said thread, devoid of said fluid flow passage, for forming a metal-to-metal seal with said thread.
17. A thread connector as defined in claim 10 further comprising internal and external metal-to-metal seals formed at axially spaced areas adjacent said engaged threaded area.
18. A thread connector having a fluid flow passage for relieving fluid pressure in a thread lubricant contained between rigid, substantially inflexible, pin and box thread teeth engaged in a connected pin and box, comprising a bevel surface formed at the intersection of a thread crest and a thread flank of one of said pin thread tooth or said box thread tooth whereby a flow passage for said thread lubricant may be formed between said bevel surface and a thread root-to-flank intersection of said box thread tooth or said pin thread tooth, respectively to flow trapped thread lubricant to relieve fluid pressure in said thread lubricant.
19. A thread connector as defined in claim 18 wherein said fluid flow passage has no diametrical cross sectional dimensions smaller than 0.006 in.
20. A thread connector as defined in claim 18 further comprising a groove cut in said thread crest.
21. A thread connector as defined in claim 18 further comprising a continuous annular seal area intermediate axial ends of said thread teeth devoid of said fluid flow passage for forming a metal-to-metal seal between said thread teeth.
22. A thread connector as defined in claim 18 further comprising continuous annular internal and external metal-to-metal seals adjacent axially spaced ends of said pin and box threads.