Patent US3851897A successfully refreshed from Google Patents.
US3851897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well connector
Assignee: Rucker Co
•
Filing: 1973-05-24
•
Granted: 1974-12-03
•
Expires: 1993-05-24
Abstract
Abstract A well connector for connecting adjacent sections of a well drilling system together. A secondary release system is provided having a secondary piston and port for moving the primary release system to a release position in the event of a failure in the primary system actuating circuit. The secondary system includes the movable sleeve for closing a fluid port of the primary system and opening the port of the secondary release system for actuating the secondary release releasing the connection. A lifting assembly for hydraulically jacking up and separating one of the sections relative to the other section to overcome any binding between the two sections. The lifting assembly includes a lifting piston and cylinder. Control means are provided allowing actuation of the lifting piston and cylinder only when the connecting and disconnecting assembly has moved to a position disconnecting the adjacent sections, and also allowing the connecting and disconnecting assembly to move to a position to connect the adjacent sections only when the lifting piston and cylinder have been retracted.
Inventors
- 👤 A Piazza
- 👤 A Vujasinovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:48
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B33/038; Y; Y10; Y10S; Y10S285/00; Y10S285/92
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
166 words
In a connector for connecting and disconnecting two sections of a drilling system in which one section includes a locking notch and the second section includes a double acting piston having sealing means and connected to and moving a locking lug into and out of said locking notch on reciprocal movement in a cylinder having a first port on one side of the piston for admitting fluid to move the piston in a direction to connect the sections and a second port on the second side of the piston for admitting fluid to move the piston in a direction disconnecting the sections, the improvement of a secondary disconnect system comprising, a secondary disconnecting piston having sealing means and positioned in said cylinder on a side of the second port opposite the double acting piston, and a third port in the cylinder positioned behind the secondary piston for admitting fluid for moving the secondary piston and the double acting piston in a direction for disconnecting the sections.
Claim 2
Dependent Claim
166 words
In a connector for connecting and disconnecting two sections of a drilling system in which one section includes a locking notch and the second section includes a double acting piston having sealing means and connected to and moving a locking lug into and out of said locking notch on reciprocal movement in a cylinder having a first port on one side of the piston for admitting fluid to move the piston in a direction to connect the sections and a second port on the second side of the piston for admitting fluid to move the piston in a direction disconnecting the sections, the improvement of a secondary disconnect system comprising, a secondary disconnecting piston having sealing means and positioned in said cylinder on a side of the second port opposite the double acting piston, and a third port in the cylinder positioned behind the secondary piston for admitting fluid for moving the secondary piston and the double acting piston in a direction for disconnecting the sections.
Claim 3
Dependent Claim
42 words
The apparatus of claim 1 including, a movable sleeve in said cylinder, said sleeve including an opening normally in communication between the second port and the cylinder, means for moving said sleeve and closing communication between the second port and the cylinder.
Claim 4
Dependent Claim
75 words
The apparatus of claim 1 including, a movable sleeve in said cylinder including an opening, piston means connected to the sleeve in communication with the second port whereby pressure against the piston moves the sleeve for aligning the sleeve opening with the second port, said piston means in communication with the third port whereby fluid pressure from the third port will move the sleeve and the sleeve opening out of communication with the second port.
Claim 5
Dependent Claim
45 words
The apparatus of claim 3 including, seal means between the double acting piston and the third port for sealing with the sleeve piston for insuring that the sleeve is actuated by fluid from the third port prior to the movement of the secondary disconnect piston.
Claim 6
Dependent Claim
35 words
The apparatus of claim 1 including, a lifting piston and cylinder connected to the second section for lifting the second section relative to the first section for aiding in separating the first and second sections.
Claim 7
Dependent Claim
61 words
The apparatus of claim 5 including, control means allowing actuation of the lifting piston and cylinder only when the double acting piston has moved to a position disconnecting the first and second sections, and allowing the double acting piston to move to a position to connect the first and second sections only when the lifting piston and cylinder have been retracted.
Claim 8
Dependent Claim
147 words
In a connector for connecting and disconnecting two sections of drilling system in which one section includes a locking notch and the second section includes a double acting piston connected to and moving a locking lug into and out of said locking notch on reciprocal movement in a cylinder having a first port for admitting fluid to move the piston in a direction to connect the sections and a second port on the second side of the piston for admitting fluid to move the piston in a direction disconnecting the sections, the improvement of a lifting assembly for lifting the second section relative to the first section for aiding in separating the first and second sections comprising, an annular ring-shaped lifting piston and cylinder means having sealing means therebetween connected to the second section and extending therearound for lifting the second section relative to the first section.
Claim 9
Dependent Claim
147 words
In a connector for connecting and disconnecting two sections of drilling system in which one section includes a locking notch and the second section includes a double acting piston connected to and moving a locking lug into and out of said locking notch on reciprocal movement in a cylinder having a first port for admitting fluid to move the piston in a direction to connect the sections and a second port on the second side of the piston for admitting fluid to move the piston in a direction disconnecting the sections, the improvement of a lifting assembly for lifting the second section relative to the first section for aiding in separating the first and second sections comprising, an annular ring-shaped lifting piston and cylinder means having sealing means therebetween connected to the second section and extending therearound for lifting the second section relative to the first section.
Claim 10
Dependent Claim
81 words
The apparatus of claim 7 including, control means including valve means interconnected between the lifting piston and cylinder and the double acting piston and it coacting cylinder for allowing actuation of the lifting piston and cylinder only when the double acting piston has moved to a position disconnecting the first and second sections, and allowing the double acting piston to move to a position to connect the first and second sections only when the lifting piston and cylinder have been retracted.
Claim 11
Dependent Claim
85 words
The apparatus of claim 8 wherein the control means includes, a first normally closed valve controlling the fluid to the first port, said first valve positioned to be engaged by the lifting assembly and actuated to an open position when the lifting assembly is retracted, and a second normally closed valve controlling the fluid to the lifting assembly, said second valve positioned to be engaged by the double acting piston and actuated to an open position when double acting piston moves to a disconnect position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |