Epicyclic washpipe swivel cartridge and method
The present invention provides an assembly, system, and method for an epicyclic washpipe swivel cartridge that can includes a gear reduction assembly with a sealed lubrication enclosure that can operate independent of roller bearings. The cartridge includes a pair of clamshell clamps to insert the cartridge in position without requiring dislocation of the mating assemblies. The system can further include a hydraulic port for efficient activation of the seals before placing high on a top drive of an oil derrick or other remote location.
1. An epicylic washpipe swivel cartridge for a washpipe, comprising:
a lower assembly having a bore and a circumferential channel around an inside perimeter of the bore, the channel having an upper face open in an upward direction, and a sun gear coupled to a radially inward periphery of the channel, the sun gear configured to radially engage outwardly;
a planet gear carrier assembly having a carrier ring, a downwardly disposed axle, a planet gear rotatably coupled to the axle and supported by the upper face of the channel, the planet gear disposed radially outward from the sun gear and configured to engage the sun gear, and a rotary seal disposed between the carrier ring and the lower assembly that is configured to seal a leakage path through an interface between the lower assembly and the carrier ring from the washpipe radially outward;
a ring gear assembly having a ring gear disposed radially outward from the planet gear, the ring gear configured to rotatably engage the planet gear distally from the sun gear, a holding ring coupled to the ring gear, and a rotary seal disposed between the holding ring and the carrier ring that is configured to seal a leakage path from an upward direction into an interface between the holding ring and the carrier ring; and
a retainer ring assembly configured to radially engage an outward surface of the lower assembly adjacent the ring gear assembly, the retainer ring assembly having a retainer ring and a rotary seal disposed radially inward from the retainer ring that is configured to seal a leakage path from an upward direction into an interface between the retainer ring and the holding ring.
2. The swivel cartridge of claim 1 , further comprising a sealed lubrication chamber wherein the gears are disposed at least partially within the chamber.
3. The swivel cartridge of claim 2 , wherein the sealed lubrication chamber contains liquid, viscous, solid, or combinations thereof of lubricant disposed between metal-to-metal surfaces.
4. The swivel cartridge of claim 1 , further comprising a lower adapter hub coupled to the lower assembly.
5. The swivel cartridge of claim 4 , further comprising a lower clamp configured to clamp the lower adapter hub into sealing engagement with the lower assembly.
6. The swivel cartridge of claim 4 , wherein the lower adapter hub is configured to be coupled to a lower top drive connection.
7. The swivel cartridge of claim 1 , wherein the lower assembly is rotatable about a longitudinal axis through the washpipe.
8. The swivel cartridge of claim 1 , wherein the ring gear is non-rotatably coupled relative to the holding gear.
9. The swivel cartridge of claim 1 , wherein the lower assembly further comprises at least one of a packing spacer and a packing seal disposed around the washpipe.
10. The swivel cartridge of claim 1 , further comprising an upper assembly having a bore, and at least one of a packing spacer and a packing seal disposed around the bore.
11. The swivel cartridge of claim 10 , wherein the upper assembly is non-rotatable relative to the washpipe.
12. The swivel cartridge of claim 10 , further comprising an upper adapter hub coupled to the upper assembly.
13. The swivel cartridge of claim 12 , wherein the upper adapter hub is configured to be coupled to an upper top drive connection.
14. The swivel cartridge of claim 10 , wherein the ring gear is coupled to the holding gear and the holding gear is non-rotatably coupled to the upper assembly.
15. The swivel cartridge of claim 1 , further comprising a seal compressor tool configured to compress a packing stack of packing spaces and packing seals in the lower assembly.