BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of an embodiment of a mobile snubbing system, in travel mode, with the snubbing unit pivoted to the shipping position within the maximum road height, width, length, and weight allowance;
FIG. 2 is a perspective view the embodiment of FIG. 1 viewed from the open side with the pipe rack arms stowed;
FIG. 3 is a perspective view of the embodiment of FIG. 1 viewed from the open side, with the snubbing unit being shown in various incremental stages of being raised into the second operational position over a wellhead;
FIG. 4A is a plan view of the invention, in operational mode, with the snubbing unit in place over the wellhead and the pipe rack arms extended and with the pipe handler in place in various incremental stages of FIG. 5;
FIG. 4B is a plan view of the invention of FIG. 4A with the pipe handler removed for clarity;
FIG. 5 is a side view of the embodiment of FIG. 4 with the pipe handler being shown in various incremental stages of raising a tubular from the bed to above the snubbing unit;
FIG. 6 is a perspective view of an embodiment of the mobile snubbing system in travel mode illustrating the auxiliary equipment side;
FIG. 7 is a perspective view of FIG. 6 illustrating the open side for handling tubulars;
FIG. 8 is a front view illustrating the shipment within maximal permissible roading dimensions and the stowed pipe rack arms on the open side. The rear (second) pipe rack arm is shown with the pivot end extended to clear the wheels in preparation for pivoting out;
FIG. 9 is a rear view illustrating the snubbing unit with pressure testing flange and nubbin bolted in place for pressure test and transport mode. As in FIG. 9, the rear (second) pipe rack arm is shown with the pivot end extended to clear the wheels in preparation for pivoting out;
FIG. 10 is a partial side view illustrating the snubbing unit over the tridem drive and raising actuators;
FIG. 11A is a partial side view illustrating the snubbing unit over the tridem drive from the open side and illustrating the rear (second) pivoted pipe rack arm and removable truss components shown removed for clearing the wheels;
FIG. 11B is a partial side view of FIG. 11A with the rear (second) pipe rack arm pivot extended for clearing the wheels and the removable truss components installed;
FIG. 12 is a perspective birds-eye view of the mobile snubbing system from the open side of the bed with the pipe rack arms extended and the pipe handler manipulating a tubular over the snubbing unit;
FIG. 13 is a perspective birds-eye view of FIG. 12 from the closed side;
FIG. 14 is a plan view of FIG. 12;
FIG. 15 is a side elevational view of FIG. 12 from the closed side—the ground being omitted to show the casing and tubing extending through the casing;
FIG. 16 is a rear view of FIG. 12;
FIG. 17 is a perspective view illustrating the L-frame and actuators and the pipe handler with the pipe carriage and a tubular stabbed above and into the traveling slips;
FIGS. 18A through 18D are partial perspective views of the L-frame with the axis beam member in various modes of operation (the tongs being shown in dotted lines). More particularly,
FIG. 18A illustrates the axis beam member in the closed position;
FIG. 18B illustrates the axis beam member of FIG. 18A with the pin released and the beam being pivoted to the open position;
FIG. 18C illustrates the axis beam member of FIG. 18A in the open position;
FIG. 18D illustrates of the other side of the axis beam member of FIG. 18A;
FIG. 19 is a side elevational view of the rear of the system for illustrating the actuators for the L-frame and pipe handler (wellhead omitted for clarity);
FIG. 20 is a partial side elevational view of the pipe handler shown gripping a tubular above the snubbing unit, about to be stabbed therein;
FIG. 21A is a cross-sectional rear view illustrating the pipe rack arms;
FIG. 21B is a cross-sectional partial rear view illustrating the indexer and the pipe handler clamp closed;
FIG. 21C is a cross-sectional partial rear view illustrating the indexer lever selecting a tubular and with the pipe handler clamp open to receive the tubular of FIG. 12B;
FIGS. 21D and 21E are cross-sectional partial rear views illustrating the kicker removing a tubular from the pipe handler;
FIG. 22 is a partial rear elevational view with the rear leveling stand lowered to engage the ground (ground omitted);
FIG. 23A is a perspective view of an embodiment of a pipe handler having a boom and pipe carriage with spaced tubular gripping and guide clamps (opened);
FIG. 23B is a perspective view of an embodiment of FIG. 23A from another viewpoint;
FIG. 24 is a partial close up perspective view illustrating the actuators for the L-frame;
FIG. 25 is a partial perspective view of the truck bed and L-frame with the rear pipe rack arm extended and the removable sections re-installed, the pipe rack arm supporting tubulars and outrigger stands supporting the racks;
FIG. 26 is a close up of FIG. 25 illustrating the telescoping rear rack arm pivot and installed removable sections;
FIG. 27 is a close up of pivoting connection of the front pipe rack arm to the open side;
FIG. 28 illustrates a partial cutaway cross-sectional perspective view of the primary BOP of the snubbing unit with the nubbin and dummy testing flange installed;
FIG. 29 is a view of an embodiment of the snubbing unit in isolation for detailing the preferred components; and
FIGS. 30A and 30B are operational views of the snubbing unit of FIG. 29 illustrating the actuators stroking operation with the traveling plate raised, and lowered respectively.
Patent Application
20070193749
