WO2013192058A4 - Conductor connection - Google Patents
Conductor connection Download PDFInfo
- Publication number
- WO2013192058A4 WO2013192058A4 PCT/US2013/046049 US2013046049W WO2013192058A4 WO 2013192058 A4 WO2013192058 A4 WO 2013192058A4 US 2013046049 W US2013046049 W US 2013046049W WO 2013192058 A4 WO2013192058 A4 WO 2013192058A4
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- box
- pin
- threads
- connection
- neck
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/06—Screw-threaded joints; Forms of screw-threads for such joints characterised by the shape of the screw-thread
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
A box and pin for connecting joints of pipe quickly and safely to convey fluids that may be pile driven into the earth. Flank angles are chosen to also preload the box and pin threads high enough with the radial force available, against the forces of pile driving to prevent fatigue of the connection or leakage and also to prevent loss of energy while being driven by a pile hammer, to prevent damage to the connection and more efficiently drive the pipe into the earth.
Claims
1. A threaded connection having an axis (100) and a box (1) formed with box threads (5) the box threads being formed with a crest (31), a root (33), a load flank (35), a stab flank (37), the connection also having a pin (2) formed with pin threads (6) for mating with the box threads, the pin thread form having a crest (32), a root (34), a load flank (36), and a stab flank (38), the threads having a load flank angle (41) and a stab flank angle (42), comprising:
The box and pin crests being formed substantially parallel to the axis and the stab flank angle being a positive angle no greater than 10 degrees; the load flank angle being a positive angle no greater than 10 degrees such that when the connection is tightened, tangential thread interference stresses exist in the box and pin that are higher than the stresses that can be caused by a hammer.
2. The connection of claim 1 having a thread pitch (46) and a thread lead (47), and a taper (50) further comprising:
The thread having a taper equal to twice the stab flank width minus the load flank width, all divided by the thread pitch; the thread havmg a lead equal to not less than twice the load flank width, divided by the taper.
3. The connection of claim 1 having a weld-neck (4) for welding to a joint of pipe further comprising:
The stab flank angle being no less than three degrees.
4. The box of claim 1 having a weld-neck (3) for welding to a joint of pipe, further comprising:
The stab Hank angle being small enough such that, when the pin is stabbed into the box with the joint weight being supported by the box stab flanks before rotation of the pin, that the bearing stress between mating stab flanks is not great enough to cause galling, as the pin is being made up with the box.
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5. The connection of claim 1 having a pin weld-neck (4) and a box weld-neck (3) further comprising:
The weld necks being suitable for welding to pipe joints so as to form a string of pipe to contain fluids; the connection being as strong as the pipe joints against rated service forces.
6. The connection of claim 1 having a box neck seat (15) formed adjacent the small diameter end of the box threads (5) a pin nose (14) being formed adjacent the small diameter end of the tapered pin threads (6), further comprising:
The box neck seat being dimensioned for diametrical interference with the pin nose, sufficiently to effect a fluid seal against internal pressure.
7. The connection of claim 6 having a box neck O-ring (17), further comprising:
The box neck Oring being positioned in the box neck to seal against the pin nose against internal fluid pressure.
8. The connection of claim 1 having a box nose (13) formed adjacent the large diameter end of the box threads (5) and a pin neck seat (16) formed adjacent the large diameter end of the pin threads (6), further comprising:
The pin neck seat being dimensioned for diametrical interference with the box nose, sufficiently to effect a fluid seal against external fluid pressure.
9. The connection of claim 8 having a pin neck O-ring (18), further comprising:
The pin neck O-ring seal being positioned in the pin neck to seal against the box nose.
10. The threaded connection of claim 1 having a box (1) formed with tapered box threads (5) and a weld neck (3), and a pin (2) formed with tapered pin threads (6) for mating with the box threads, the box and pin threads having a predetermined sealing radial interference between them, the threads having a load flank angle (41 ) and a stab flank angle (42), comprising:
The load flank angle and the stab flank angle and the radial interference being dimensioned to preload the connection upon makeup, with stresses that are at least equal to operating stresses when at rated loads.
10
1 1. The connection of claim 10, further comprising:
The preload stresses being at least, equal to the stresses imposed on the connection when being driven into the earth by a pile driving hammer.
12. The connection of claim 10, further comprising:
The preload stresses being at least eight- tenths of the stresses imposed on the connection by an axial load equal to the pipe axial yield load.
13. The threaded connection of claim 1 having a radial interference between the threads, further comprising:
The load flank angle and the stab flank angle and the radial interference being dimensioned to preload the connection upon makeup, with stresses that are at least equal to rated operating stresses when at rated loads.
14. An o-ring groove (23) and a vent hole (22) configured for the o-ring to seal in one direction but not in the opposite direction, comprising:
A vent passage being formed to vent one side of the groove.
15. A threaded connection having an axis (100) and a box (1) having a weld neck (3) formed with box threads (5) the box threads being formed with a crest (31), a root (33), a load flank (35), a stab flank (37), the connection also having a pin (2) formed with pin threads (6) for mating with the box threads, the box and pin threads having a predetermined sealing radial interference between them, the pin thread form having a crest (32), a root (34), a load flank (36), and a stab flank (38), the threads having a load flank angle (41) and a stab flank angle (42) an o-ring groove (23) and a vent hole (22) comprising:
The groove being configured for the o-ring to seal in one direction against service pressure but not in the opposite direction; the box and pin crests being formed substantially parallel to the axis and the tab flank angle bemg a positive angle less than 45 degrees; the load flank angle and the stab flank angle and the radial interference being dimensioned to preload the connection upon makeup, with stresses that are at least equal to operating stresses; the vent passage being
11
formed and positioned to vent one side of the groove to allow escape of excess thread dope from between the mating threads.
12
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261660774P | 2012-06-17 | 2012-06-17 | |
| US61/660,774 | 2012-06-17 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2013192058A2 WO2013192058A2 (en) | 2013-12-27 |
| WO2013192058A3 WO2013192058A3 (en) | 2014-07-03 |
| WO2013192058A4 true WO2013192058A4 (en) | 2014-08-21 |
Family
ID=49769669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2013/046049 WO2013192058A2 (en) | 2012-06-17 | 2013-06-16 | Conductor connection |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2013192058A2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4601491A (en) * | 1983-10-19 | 1986-07-22 | Vetco Offshore, Inc. | Pipe connector |
| CN1433510A (en) * | 2000-06-07 | 2003-07-30 | 住友金属工业株式会社 | Taper threaded joint |
| DE60110805T2 (en) * | 2000-06-09 | 2006-02-23 | Vallourec Mannesmann Oil & Gas France | PIPE CONNECTION |
| GB2438631B (en) * | 2006-06-02 | 2008-02-13 | Alan Stewart Paton | Bimetal Bore Seal |
-
2013
- 2013-06-16 WO PCT/US2013/046049 patent/WO2013192058A2/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013192058A2 (en) | 2013-12-27 |
| WO2013192058A3 (en) | 2014-07-03 |
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