Patent US4655288A successfully refreshed from Google Patents.
US4655288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lost-motion valve actuator
Assignee: Halliburton Co
•
Filing: 1985-07-03
•
Granted: 1987-04-07
•
Expires: 2005-07-03
Abstract
Abstract A lost-motion valve actuator which provides the ability to run a tool bore closure valve in a testing string into a well in an open mode, apply pressure to the well annulus surrounding the string without cycling the valve, thereafter reduce pressure, closing the valve subsequent to the initial pressure increase, and subsequently opening the valve with pressure increases and closing it with pressure decreases, thus permitting the tool bore closure valve to subsequently respond in a normal manner (open on pressure increase, close on pressure decrease) to pressure changes in the annulus subsequent to the first pressure increase/decrease cycle.
Inventors
- 👤 II Wesley J. Burris
- 👤 Paul D. Ringgenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:54
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/108; E21B49/00; E21B49/001; E21B2200/00; E21B2200/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A lost-motion valve actuator for a bore closure valve employed in a well bore, comprising: operating connector means adapted to move said bore closure valve between open and closed positions through longitudinal movement of said operating connector means, said operating connector means comprising an operating connector and a connector insert defining a recess therebetween; locking dog means comprising at least one locking dog received in said recess and spring biasing means adapted to urge said at least one locking dog radially inwardly; and mandrel means slidably received within said operating connector means and including dog slot means associated therewith, said dog slot means comprising an annular slot on the exterior of said mandrel means adapted to lockingly receive said at least one inwardly biased locking dog when proximate thereto, whereby longitudinal movement of said mandrel means is transmitted to said operating connector means.
Claim 2
Dependent Claim
143 words
A lost-motion valve actuator for a bore closure valve employed in a well bore, comprising: operating connector means adapted to move said bore closure valve between open and closed positions through longitudinal movement of said operating connector means, said operating connector means comprising an operating connector and a connector insert defining a recess therebetween; locking dog means comprising at least one locking dog received in said recess and spring biasing means adapted to urge said at least one locking dog radially inwardly; and mandrel means slidably received within said operating connector means and including dog slot means associated therewith, said dog slot means comprising an annular slot on the exterior of said mandrel means adapted to lockingly receive said at least one inwardly biased locking dog when proximate thereto, whereby longitudinal movement of said mandrel means is transmitted to said operating connector means.
References Cited (Backward Citations)
US29638A
Cited
US29562A
Cited
USRE29562E
Cited
USRE29638E
Cited
US3796261A
Cited
US3850250A
Cited
US3823773A
Cited
US3858649A
Cited
US3856085A
Cited
US3891033A
Cited
US3901314A
Cited
US3970147A
Cited
US3986554A
Cited
US3964544A
Cited
US3976136A
Cited
US4063593A
Cited
US4064937A
Cited
US4105075A
Cited
US4125165A
Cited
US4109724A
Cited
US4113012A
Cited
US4109725A
Cited
US4144937A
Cited
US4270610A
Cited
US4445571A
Cited
US4311197A
Cited
US4295361A
Cited
US4319634A
Cited
US4319633A
Cited
US4324293A
Cited
US4355685A
Cited
US4341266A
Cited
US4422506A
Cited
US4429748A
Cited
US4403659A
Cited
US4421172A
Cited
US4399870A
Cited
US4444267A
Cited
US4444268A
Cited
US4448254A
Cited
US4522266A
Cited
US4452313A
Cited
US4458762A
Cited
US4467870A
Cited
US4467867A
Cited
US4513764A
Cited
US4489786A
Cited
US4515219A
Cited
US4502537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |