Patent ID: 11867015
Assignee: NATIONAL OILWELL VARCO, L.P.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 12:
13. A friction reduction system deployable in a wellbore, comprising:
a housing comprising a central axis and a central passage;
a valve disposed in the housing and comprising a first valve body defining a bypass passage and a second valve body having a radially outer surface extending between a first end and a second end of the second valve body and a radially inner surface extending between the first end and the second end of the second valve body, wherein the second valve body defines both a radial port and a bypass passage, the radial port extending from the radially outer surface to the radially inner surface of the second valve body, and wherein the first valve body is permitted to rotate relative to the second valve body; and
a mandrel coupled to the second valve body and permitted to travel axially relative to the housing;
wherein a first flowpath is formed in the friction reduction system when the valve is in both an open configuration and a closed configuration, the first flowpath extending through the radial port of the first valve body and into a central passage of the mandrel;
wherein a second flowpath is formed in the friction reduction system when the valve is in the open configuration but not in the closed configuration, the second flowpath extending through both the bypass passage of the first valve body and the bypass passage of the second valve body.