IP Library Granted Patent US 7,850,211
Granted Patent B2
US 7,850,211 · App. 11/626,615 · Granted Dec 14, 2010

Wedge thread connections having a clearance gap volume

Assignee: Hydril Company
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Quick Facts
Patent No.
US 7,850,211
App. No.
11/626,615
Granted
Dec 14, 2010
Kind
B2
Abstract

A wedge-threaded tubular connection includes a pin member and a box member, wherein each of the pin and box members include an engaged thread area, and a clearance gap volume formed between corresponding roots and crests of the pin and box members and arranged along an axial length of the engaged thread area according to a distribution profile. The clearance gap volume distribution profile is configured having a greater clearance gap volume proximate a central portion of the engaged thread area and progressively less clearance gap volume towards each of the distal ends of the engaged thread area.

Claims (8)

1. A wedge-threaded tubular connection, comprising:

a pin member and a box member, wherein each of the pin and box members include an engaged thread area; and

a clearance gap volume formed between corresponding roots and crests of the pin and box members and arranged along an axial length of the engaged thread area according to a distribution profile;

wherein the clearance gap volume distribution profile is configured having a greater clearance gap volume proximate a central portion of the engaged thread area and progressively less clearance gap volume towards each of the distal ends of the engaged thread area.

2. The wedge-threaded tubular connection of claim 1 , further comprising a nominal diameter greater than about 9 inches.

3. The wedge-threaded tubular connection of claim 1 , wherein the clearance gap volume gradient comprises at least one of a root clearance gap, a crest clearance gap, a load flank clearance gap, a stab flank clearance gap, a crest/flank radius gap, a root/flank radius gap, a root groove, and a crest groove.

4. The wedge-threaded tubular connection of claim 1 , wherein the distribution profile comprises at least one of a curved portion, a plateau portion, and a linear portion.

5. The wedge-threaded tubular connection of claim 1 , wherein an average dope thickness factor per pitch of the distribution profile is between about 0.003 and 0.004 inches.

Assignments (4)
CHANGE OF NAME Recorded Oct 15, 2010
From: HYDRIL LLC
To: HYDRIL COMPANY
Reel/Frame 025146/0942 →
MERGER Recorded Mar 27, 2009
From: HYDRIL COMPANY LP
To: HYDRIL GENERAL LLC
Reel/Frame 022461/0541 →
CHANGE OF NAME Recorded Mar 27, 2009
From: HYDRIL GENERAL LLC
To: HYDRIL LLC
Reel/Frame 022464/0150 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 25, 2007
From: REYNOLDS, HARRIS A., JR.
To: HYDRIL COMPANY LP
Reel/Frame 019871/0177 →
Continuity (2)
Provisional Application 6076163500 · Jan 24, 2006
Related Publication 20070176423A1 · Aug 2, 2007