Lost-motion valve actuator
A lost-motion valve actuator is described for a bore closure valve employed in a well bore, comprising: operating connector means adapted to move the bore closure valve between open and closed positions through longitudinal movement of the operating connector means. The operating connector means comprises an operating connector and a connector insert defining a recess therebetween; locking dog means comprising at least one locking dog received in the recess and spring biasing means adapted to urge at least one locking dog radially inwardly; and mandrel means slidably received within the operating connector means and including dog slot means associated therewith. The dog slot means comprises an annular slot on the exterior of the mandrel means adapted to lockingly receive at least one inwardly biased locking dog when proximate thereto, whereby longitudinal movement of the mandrel means is transmitted to the operating connector means.
- Assignee:
- Halliburton Co., Duncan, OK
- Patent Number(s):
- US 4655288
- OSTI ID:
- 6570724
- Resource Relation:
- Patent File Date: Filed date 3 Jul 1985
- Country of Publication:
- United States
- Language:
- English
Similar Records
Wireline hydraulic retrieving tool
Rapid cycle annulus pressure responsive tester valve