Patent ID: 11920433
Assignee: HALLIBURTON MANUFACTURING AND SERVICES LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 12:
13. The downhole apparatus of claim 10,
wherein the first and second valve arrangements have a first intermediate configuration between the first configuration and the second configuration, in which the first valve arrangement is unlocked, the second valve arrangement is locked and the first and second ports are closed,
wherein the first and second valve arrangements have a second intermediate configuration between the second configuration and the third configuration, in which the first valve arrangement is unlocked, the second valve arrangement is locked and the first and second ports are closed,
wherein the first and second valve arrangements have a third intermediate configuration between the second intermediate configuration and the third configuration, in which the first valve arrangement is locked, the second valve arrangement is locked and the first and second ports are closed, and
wherein the first valve arrangement comprises a further retaining member configured to hold the first valve member in the locked third intermediate configuration.