Threaded positioning mechanism
AssigneeXR Downhole, LLC
InventorGregory Prevost
Life of this patent
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Abstract
A threaded installation is provided. The threaded installation includes a nut, a bolt, and a housing. The housing includes a threaded hole. A first threaded connection is formed where the bolt is threadably coupled with the nut, and a second threaded connection is formed where the bolt is threadably coupled with the threaded hole. The first threaded connection is characterized by a first flank angle, Θ2A, of threads of the bolt or threads of the nut. The second threaded connection is characterized by a second flank angle, Θ3B, of threads of the bolt or threads of the housing. The flank angles, Θ2A and Θ3B, satisfy the following equation: k 2 = cos ( θ 2 A ) cos ( θ 3 B ) > 1 . 0 0 .
Claims45
A threaded installation, the threaded installation comprising:
- a nut, a bolt, and a housing, the housing including a threaded hole;
- a first threaded connection, wherein the bolt is threadably coupled with the nut;
- and
- a second threaded connection, wherein the bolt is threadably coupled with the threaded hole;
- wherein the first threaded connection is characterized by a first flank angle, Θ2A, of threads of the bolt or threads of the nut, wherein the second threaded connection is characterized by a second flank angle, Θ3B, of threads of the bolt or threads of the housing, and wherein Θ2A and Θ3B satisfy the following equation:
- k
- 2
- =
- cos
-
- (
- θ
- 2
-
- A
- )
- cos
-
- (
- θ
- 3
-
- B
- )
- >
- 1
- .
- 0
-
- 0
- .
A method of maintaining a position of a bolt within a threaded installation, the method comprising:
- threadably coupling a bolt with a threaded hole of a housing;
- threadably coupling a nut with the bolt, forming a threaded installation;
- wherein threaded connection between the nut and the bolt is characterized by a first flank angle, Θ2A, of threads of the bolt or threads of the nut, wherein threaded connection between the bolt and the housing is characterized by a second flank angle, Θ3B, of threads of the bolt or threads of the housing, and wherein Θ2A and Θ3B satisfy the following equation:
- k
- 2
- =
- cos
-
- (
- θ
- 2
-
- A
- )
- cos
-
- (
- θ
- 3
-
- B
- )
- >
- 1
- .
- 0
-
- 0
- .
A threaded installation, the threaded installation comprising:
- a nut, a bolt, and a housing, the housing including a threaded hole;
- a first threaded connection, wherein the bolt is threadably coupled with the nut;
- and
- a second threaded connection, wherein the bolt is threadably coupled with the threaded hole;
- wherein the bolt has asymmetric threading, including a first flank having a first flank angle and a second flank having a second flank angle, wherein the first flank angle is smaller than the second flank angle, and wherein the second flank carries bearing load on the bolt, and wherein the first flank carries positioning load on the bolt.
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A method of maintaining a position of a bolt within a threaded installation, the method comprising:
- threadably coupling a bolt with a threaded hole of a housing;
- threadably coupling a nut with the bolt, forming a threaded installation;
- wherein the bolt has asymmetric threading, including a first flank having a first flank angle and a second flank having a second flank angle, and wherein the first flank angle is smaller than the second flank angle;
- and
- carrying bearing load on the bolt on the second flank, and carrying positioning load on the bolt on the first flank.
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Dependencies are inferred from the claim text.