Electric submersible pump systems
AssigneeSchlumberger Technology Corporation
InventorsArthur Ignatius Watson, Jose Angel Caridad Urena
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Abstract
A protector for an electric submersible pump includes a plurality of chambers, with adjacent or consecutive pairs of chambers coupled, e.g., fluidly coupled, via a series or parallel body. The body defines two separate hydraulic circuits, which allows for the inclusion of a shaft seal, even when the body couples consecutive chambers in a parallel configuration or couples to a thrust bearing chamber. The shaft tube circuit can include a compensator and/or a relief valve.
Claims13
A body for a protector of an electric submersible pump, the body configured to be positioned axially between two consecutive positive-sealing chambers of the protector, the body at least partially defining a first fluidly isolated hydraulic circuit and a second fluidly isolated hydraulic circuit, and the body comprising a shaft seal, wherein the body is further configured to couple the two consecutive positive-sealing chambers in parallel.
A body for a protector of an electric submersible pump, the body configured to be positioned axially between two consecutive positive-sealing chambers of the protector and to couple the two consecutive positive-sealing chambers in series, the body at least partially defining a first fluidly isolated hydraulic circuit and a second fluidly isolated hydraulic circuit, and the body does not include a shaft seal.
A protector of an electric submersible pump, the protector comprising:
- a plurality of positive-sealing chambers of the protector, wherein two consecutive positive-sealing chambers of the plurality of positive-sealing chambers are fluidly coupled;
- a shaft;
- a shaft tube surrounding the shaft;
- a shaft seal;
- a first fluidly isolated hydraulic circuit defining a volume partially bounded by the shaft, the shaft tube, and the shaft seal;
- and
- a second fluidly isolated hydraulic circuit defining a volume inside and outside the two consecutive positive-sealing chambers,
- wherein the first fluidly isolated hydraulic circuit and the second fluidly isolated hydraulic circuit are independent of a relative rotational relationship between the plurality of positive-sealing chambers and a body of the protector,
- wherein the body is configured to be positioned axially between the two consecutive positive-sealing chambers, and
- wherein the body is further configured to couple the two consecutive positive-sealing chambers in parallel.
Dependencies are inferred from the claim text.