1. A loadable threaded connection including a box connector for welding on an end of a tubular to mate with a pin connector for welding on an end of another tubular, comprising:
the box connector having internal threads, a box shoulder spaced axially between a box attachment end for attaching to the end of the tubular and the internal threads, and an outer box surface;
a pin connector having external threads for mating with the internal threads, a pin attachment end for attaching to the end of the another tubular, a pin end for engaging the box shoulder, and an outer pin surface;
an opposing end of the box connector axially opposite the box attachment end including a projecting ring extending axially opposite the box attachment end with respect to the internal threads;
an opposing end of the pin connector axially opposite the pin attachment end having an annular slot for receiving the projecting ring therein, the annular slot having a radially outer wall, a radially inner wall and a base surface extending between the inner wall and the outer wall;
one of a radially outer surface of the pin connector axially between the slot base surface and the external threads on the pin connector and a radially inner surface of the box connector between the internal threads on the box connector and an end of the projecting ring being a radiused surface.
2. A threaded connection as defined in claim 1, further comprising:
the other of the radially outer surface of the pin connector and the radially inner surface of the box connector being a frustoconical surface for engagement with the radiused surface.
3. The threaded connection as defined in claim 1, further comprising:
the radially outer surface of the pin connector being the radiused surface;
the radially inner surface of the box connector being a frustoconical surface tapered radially inward in a direction away from the external threads; and
at least one of a radially outer surface of the projecting ring and the radially outer wall of the annular slot being tapered to force the projecting ring toward the pin connector as the connection is made up.
4. The threaded connection as defined in claim 3, wherein sliding engagement of the radially outer wall of the slot and the radially outer surface of the projecting ring forces the projecting ring radially inward as the projecting ring moves axially toward the base of the slot.
5. The threaded connection as defined in claim 1, wherein each of the radially outer surface of the pin connector and the radially inner surface of the box connector is a radiused surface.
6. The threaded connection as defined in claim 1, further comprising:
an internal pressure seal axially opposite the projecting ring with respect to the internal threads for sealing between the box connector and the pin connector to seal internal pressure within the connection.
7. The threaded connection as defined in claim 6, wherein the internal pressure seal is an elastomeric seal carried on the box connector.
8. The threaded connection as defined in claim 1, wherein the radially outer wall of the slot is angled with respect to a centerline of the pin connector at from 0 to 15\xb0.
9. The threaded connection as defined in claim 1, wherein an axial centerline of metal-to-metal interference between the radially outer surface of the pin connector and the radially inner surface of the box connector is axially spaced at less than 30\xb0 from an axial centerline of metal-to-metal interference between a radially outer surface of the projecting ring and the radially outer wall of the slot.
10. A threaded connection as defined in claim 1, wherein an axial spacing between an axial centerline of a metal-to-metal interference between the radially outer surface of the pin connector and the radially inner surface of the box connector and an axial centerline of metal-to-metal interference between a radially outer surface of the projecting ring and the radially outer wall of the slot is less than 3 times an axial depth of the slot.
11. The threaded connection as defined in claim 1, wherein a radial thickness of the projecting ring approximates a radial thickness between the radially outer wall of the annular slot and the outer pin surface.
12. The threaded connection as defined in claim 1, wherein the internal threads and the external threads are each hook threads.
13. The threaded connection as defined in claim 1, wherein each of the outer surface of the box connector and the outer surface of the pin connector is greater than 18 inches.
14. The threaded connection as defined in claim 1, wherein each of the outer box surface and the outer pin surface are radially outward of an outer surface of each of the tubular and the another tubular.
15. A threaded connection including a box connector for welding on an end of a tubular to mate with a pin connector for welding on an end of another tubular, comprising:
the box connector having internal threads, a box shoulder spaced axially between a bit weld end for welding to the end of the tubular and the internal threads, and an outer box surface;
a pin connector having external threads for mating with the internal pin threads, a weld end for welding to the end of the another tubular, a pin end for engaging the box shoulder, and an outer pin surface;
an opposing end of the box connector axially opposite the box weld end including a projecting ring extending axially opposite the box weld end with respect to the internal threads;
an opposing end of the pin connector axially opposite the box weld end having an annular slot for receiving the projecting ring therein;
one of a radially outer surface of the pin connector axially between the slot and the external threads on the pin connector and a radially inner surface of the box connector between the internal threads on the box connector and the projecting ring being a radiused surface;
the other of the radially outer surface of the pin connector and the radially inner surface of the box connector being a frustoconical surface for engagement with the radiused surface; and
at least one of a radially outer surface of the projecting ring and the radially outer wall of the annular slot being tapered to force the projecting ring toward the pin connector as the connection is made up.
16. The threaded connector as defined in claim 15, further comprising:
the radially inner surface of the box connector being the frustoconical surface which is tapered radially inward in a direction away from the external threads; and
a radially outer wall of the projecting ring being tapered radially inward in a direction axially away from the internal threads.
17. A threaded connection as defined in claim 15, wherein a radial thickness of the projecting ring approximates a radial thickness between an outer surface of the annular slot and the outer pin surface.
18. The threaded connection as defined in claim 15, wherein a radially outer wall of the slot is angled with respect to a centerline of the pin connector at from 0 to 15\xb0.
19. The threaded connection as defined in claim 15, wherein an axial centerline of metal-to-metal interference between the radially outer surface of the pin connector and the radially inner surface of the box connector is axially spaced at less than 30\xb0 from an axial centerline of metal-to-metal interference between a radially outer surface of the projecting ring and the radially outer wall of the slot.
20. A threaded connection as defined in claim 15, wherein an axial spacing between an axial centerline of a metal-to-metal interference between the radially outer surface of the pin connector and the radially inner surface of the box connector and an axial centerline of metal-to-metal interference between a radially outer surface of the projecting ring and the radially outer wall of the slot is less than 3 times an axial depth of the slot.
21. The threaded connection as defined in claim 15, wherein each of the outer surface of the box connector and the outer surface of the pin connector is greater than 18 inches.
22. The threaded connection as defined in claim 15, wherein the internal threads and the external threads are each hook threads.
23. The threaded connection as defined in claim 15, further comprising:
an internal pressure seal axially opposite the projecting ring with respect to the internal threads for sealing between the connector and the pin connector to seal internal pressure within the connection.
24. A threaded connection including a box connector for welding on an end of a tubular to mate with a pin connector for welding on an end of another tubular, comprising:
the box connector having internal threads, a box shoulder spaced axially between a box weld end for welding to the end of the tubular and the internal threads, and an outer box surface;
a pin connector having external threads for mating with the internal threads, a pin weld end for welding to the end of the another tubular, a pin end for engaging the box shoulder, and an outer pin surface;
an opposing end of the box connector axially opposite the box weld end including a projecting ring extending axially opposite the box weld end with respect to the internal threads;
an opposing end of the pin connector axially opposite the pin weld end having an annular slot for receiving the projecting ring therein;
a radially outer surface of the pin connector axially between the external threads and a base of the slot being a radiused surface;
a radially inner surface of the box connector being a frustoconical surface tapered radially inward in a direction axially away from the internal threads for sealing engagement with the radiused surface; and
at least one of a radially outer surface of the projecting ring and the radially outer wall of the annular slot being tapered to force the projecting ring toward the pin connector as the connection is made up.
25. The threaded connection as defined in claim 24, wherein sliding engagement of the radially outer wall of the slot and the radially outer surface of the projecting ring forces the projecting ring radially inward as the projecting ring moves axially toward a base of the slot.
26. The threaded connection as defined in claim 24, wherein the internal threads and the external threads are each hook threads, and each of the outer box surface and the outer pin surface are radially outward of an outer surface of both the tubular and the another tubular.
27. The threaded connection as defined in claim 24, wherein an axial centerline of metal-to-metal interference between the radially outer surface of the pin connector and the radially inner surface of the box connector is axially spaced at less than 30\xb0 from an axial centerline of metal-to-metal interference between a radially outer surface of the projecting ring and the radially outer wall of the slot.
28. A threaded connection as defined in claim 24, wherein an axial spacing between an axial centerline of a metal-to-metal interference between the radially outer surface of the pin connector and the radially inner surface of the box connector and an axial centerline of metal-to-metal interference between a radially outer surface of the projecting ring and the radially outer wall of the slot is less than 3 times an axial depth of the slot.
29. The threaded connection as defined in claim 24, wherein a radial thickness of the projecting ring approximates a radial thickness between the radially outer wall of the annular slot and the outer pin surface.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A cleaner comprising:
a cleaning apparatus that is removably mounted in the cleaner and is dismounted from the cleaner to perform an additional cleaning operation, the cleaning apparatus comprising a housing to store dirt therein, an outlet through which the dirt stored in the housing is discharged, and a movable cover movable between a closing position to close the outlet and an opening position to open the outlet;
a receiving unit for receiving the cleaning apparatus;
a conversion unit for converting the movable cover of the cleaning apparatus from the closing position to the opening position if the cleaning apparatus is mounted in the receiving unit;
a suction unit for drawing in dirt from a cleaning surface along with air; and
a dust-collector which is fluidly connected to the suction unit and the cleaning apparatus to separate dirt from air.
2. The cleaner as claimed in claim 1, wherein the conversion unit comprises a protrusion disposed on the movable cover; and a slot disposed on the receiving unit to correspond to the protrusion,
wherein the protrusion moves along the slot when the cleaning apparatus is being mounted in the receiving unit such that the movable cover is converted from the closing position into the opening position.
3. The cleaner as claimed in claim 1, wherein the movable cover is elastically biased toward the closing position.
4. The cleaner as claimed in claim 1, wherein the movable cover is disposed on a leading end of the housing in a mounting direction.
5. The cleaner as claimed in claim 1, wherein the cleaning apparatus further comprises a fixed cover which is disposed on a leading end of the housing in a mounting direction, and the movable cover is rotated about a rotary shaft disposed on the fixed cover.
6. The cleaner as claimed in claim 5, wherein the fixed cover and the movable cover each have a hemispherical shape.
7. The cleaner as claimed in claim 1, further comprising a duct for connecting the receiving unit and the dust-collector to each other.
8. The cleaner as claimed in claim 7, further comprising a valve which is movable between a first position to block a current in the duct and a second position to allow the current in the duct to flow.
9. The cleaner as claimed in claim 8, wherein the valve is elastically biased toward the first position.
10. The cleaner as claimed in claim 8, further comprising a switch for controlling an operation of the valve.
11. The cleaner as claimed in claim 1, wherein the cleaning apparatus further comprises a rotary plate on which a first brush is disposed; and a second brush and a third brush which are disposed on left and right sides of the housing with respect to the rotary plate so as to interfere with the first brush.
12. The cleaner as claimed in claim 11, wherein the second brush and the third brush are inclined inward the housing.
13. The cleaner as claimed in claim 11, wherein the cleaning apparatus further comprises a blade which protrudes from a center of the rotary plate to limit a rotation angle of the rotary plate.
14. The cleaner as claimed in claim 1, wherein the cleaning apparatus further comprises a filter through which air is passed but dirt is not passed.
15. A cleaning apparatus which is removably mounted in a cleaner and is dismounted from the cleaner to perform an additional cleaning operation, the cleaning apparatus comprising:
a housing which forms an exterior of the cleaning apparatus and stores dirt therein;
an outlet through which the dirt stored in the housing is discharged; and
a movable cover which is movable between a closing position to close the outlet and an opening position to open the outlet,
wherein, if the cleaning apparatus is dismounted from the cleaner, the movable cover moves to the closing position to prevent the dirt stored in the housing from being discharged externally, and, if the cleaning apparatus is mounted in the cleaner, the movable cover moves to the opening position such that the cleaning apparatus is fluidly connected to a dust-collector of the cleaner.