Pressure management device for drilling system
A pressure management device (PMD) for direct connection to a blowout preventor stack of a managed pressure drilling system, the PMD comprising a housing, one or more chokes, and a directional valve. The directional valve has a choke position and a bypass position. When the directional valve is in the choke position, the PMD operates to divert fluid entering the housing to one or more of the chokes. When the directional valve is in the bypass position, the PMD operates to divert fluid entering the housing to bypass the chokes. The inlet and outlet of each choke may be controlled by a dual shutoff valve, to selectively permit and restrict fluid flow through each choke.
1 . A choke assembly comprising:
a choke cartridge;
a choke housing having a first end, a second end, a wall with an inner surface defining a chamber, and a choke inlet and a choke outlet extending through the wall and in fluid communication with the chamber, the first end having an opening providing open access to the chamber, and the chamber configured to removably receive at least a portion of the choke cartridge via the opening; and
a dual shutoff valve in communication with one or both of the choke inlet and the choke outlet, the dual shutoff valve having a closed position in which the dual shutoff valve blocks one or both of the choke inlet and the choke outlet and having an open position in which the dual shutoff valve unblocks the choke inlet and the choke outlet.
2 . The choke assembly of claim 1 , wherein at least a portion of the dual shutoff valve is positioned in the chamber and is configured to removably receive at least a portion of the choke cartridge therein.
3 . The choke assembly of claim 2 , wherein the at least a portion of the dual shutoff valve is positioned between the wall of the choke housing and the choke cartridge, when the at least a portion of the choke cartridge is received in the dual shutoff valve.
4 . The choke assembly of claim 1 comprising an installation mechanism for supporting the choke cartridge and aligning the choke cartridge with the opening at the first end.
5 . The choke assembly of claim 4 , wherein the installation mechanism comprises a telescoping arm and a support bracket at or near a free end of the telescoping arm, the telescoping arm being selectively extendable and retractable relative to the choke housing, and the bracket being configured to engage and support a portion of the choke cartridge.
6 . The choke assembly of claim 4 , wherein the installation mechanism is configured to restrict axial movement of the choke cartridge while permitting rotational movement of the choke cartridge.
7 . The choke assembly of claim 1 , wherein the choke cartridge comprises a cartridge installation arm.
8 . The choke assembly of claim 1 , wherein the dual shutoff valve is rotatable relative to the choke housing between the open position and the closed position, and the choke cartridge is rotationally lockable to the dual shutoff valve or the choke housing.
9 . The choke assembly of claim 1 , wherein the dual shutoff valve comprises a wall having an inlet port and an outlet port extending therethrough, and wherein in the open position, the inlet port and outlet port are aligned with the choke inlet and choke outlet, respectively and wherein in the closed position, the inlet port and the outlet port are misaligned with the choke inlet and choke outlet, respectively.
10 . The choke assembly of claim 1 , wherein the choke cartridge has a cartridge inlet and a cartridge outlet, and wherein the cartridge inlet and the cartridge outlet are aligned with the inlet port and the outlet port, respectively, when the choke cartridge is received in the chamber.
11 . The choke assembly of claim 1 , wherein the choke cartridge has a first alignment profile and the choke housing or the dual shutoff valve has a second alignment profile configured to matingly engage the first alignment profile.
12 . A method comprising inserting a choke cartridge into a choke housing, via an open first end of the choke housing, the choke housing being operably coupled to a housing in fluid connection with a blowout preventor stack of a drilling system, wherein prior to inserting, aligning an alignment profile of the choke cartridge with an alignment profile of the choke housing or an alignment profile of a dual shutoff valve coupled to the choke housing, wherein inserting comprises engaging the alignment profile of the choke cartridge with the alignment profile of the choke housing or the alignment profile of the dual shutoff valve.
13 . The method of claim 12 comprising, prior to inserting, engaging the choke cartridge with an installation mechanism, and wherein inserting comprises actuating, by an installation mechanism actuator, the installation mechanism to move the choke cartridge relative to the choke housing.
14 . The method of claim 13 , wherein actuating the installation mechanism comprises detecting a torque of the installation mechanism actuator.
15 . The method of claim 12 comprising, prior to inserting, supporting the choke cartridge on a telescoping arm, wherein inserting comprises retracting the telescoping arm relative to the choke housing.
16 . The method of claim 12 , wherein inserting comprises pulling an installation arm of the choke cartridge through an opening at a second end of the choke housing.
17 . The method of claim 12 comprising removing the choke cartridge from the choke housing.
18 . The method of claim 17 comprising, prior to removing, engaging the choke cartridge with an installation mechanism, wherein removing comprises actuating the installation mechanism to move the choke cartridge relative to the choke housing and disengaging the choke cartridge from the installation mechanism.
19 . The method of claim 18 , wherein removing comprises pushing an installation arm of the choke cartridge to eject the choke cartridge from the choke housing.
20 . The method of claim 17 comprising, prior to removing, supporting the choke cartridge on a telescoping arm, and wherein removing comprises extending the telescoping arm relative to the choke housing.