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

Claim 0:
1. 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 and a second valve body 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 net pressure force generated by a pressure of a drilling fluid is applied against the mandrel in response to flowing the drilling fluid through the valve and transitioning the valve from a closed configuration to an open configuration; and
wherein a second net pressure force generated by a pressure of wellbore fluid in an annulus formed in the wellbore surrounding the housing is applied against the mandrel in response to flowing the drilling fluid through the valve and transitioning the valve from the open configuration to the closed configuration.