Remote control selector valve
Patent
·
OSTI ID:6553242
This patent describes earth borehole operations involving fluid conducting pipe strings in which operators at the earth surface control downhole machinery by actions at the earth surface involving fluid flow rate manipulation. An apparatus is described comprising: a. a pipe string suspended in an earth borehole; b. means situated at the earth surface to cause fluid flow and to control the rate of fluid flow through the pipe string; c. means situated downhole attached to the pipe string responsive to the fluid flow rate to produce an output signal when the flow is caused to exceed a preselected rate; d. downhole means responsible to the signal to produce a preselected change in the characteristic of the signal in response to a preselected number of times the signal is produced; and e. actuator means responsive to at least one characteristic of the signal to actuate preselected downhole machine elements attached to the pipe string, the actuator means being non-responsive to at least one other characteristic of the signal.
- Assignee:
- Petro-Design, Inc., Youngville, LA
- Patent Number(s):
- US 4655289
- OSTI ID:
- 6553242
- Country of Publication:
- United States
- Language:
- English
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