US4378849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowout preventer with mechanically operated relief valve
Assignee: Individual
•
Filing: 1981-02-27
•
Granted: 1983-04-05
•
Expires: 2001-02-27
Abstract
Abstract A blowout preventer having a mechanical linkage to a valve connected to a pressure relief line in the casing beneath the blowout preventer whereby the valve on the pressure relief line is opened when the blowout preventer is actuated is disclosed. The blowout preventer includes an upright tubular body having an annular packing therein which can be constructed about a drill pipe or other pipe in the well, a head connected to the top of the upright tubular body for containing the annular packing in the body, a piston slidably received in the body and adapted to selectively constrict the packing about the well pipe, a casing pipe connected to the lower end of the body for containing the well pipe, a pressure relief line connected to the casing having a valve therein, and a rod connected to the piston and the valve to open the valve when the piston slides within the tubular body to constrict the packing about the well pipe.
Inventors
- 👤 Joe A. Wilks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:19
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B34/00; E21B34/02; E21B34/16; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87708
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
142 words
A blowout preventor for use on a well comprising: a. a body member adapted for containing a well pipe and means for selectively preventing fluid from the bottom of the well pipe through said body members; b. a casing connected to the bottom of the body means, said casing having a pressure relief line connected thereto, said pressure relief line comprising a pipe connected to said casing for diverting fluids contained in said casing to a location remote from said casing having a valve therein; and c. means for mechanically linking said valve to said means for selectively preventing fluid from the bottom of the well from flowing around the outside of the well through said body member so that said valve is opened when the flow of fluids around the outside of the well pipe through said body member is prevented.
Claim 2
Dependent Claim
142 words
A blowout preventor for use on a well comprising: a. a body member adapted for containing a well pipe and means for selectively preventing fluid from the bottom of the well pipe through said body members; b. a casing connected to the bottom of the body means, said casing having a pressure relief line connected thereto, said pressure relief line comprising a pipe connected to said casing for diverting fluids contained in said casing to a location remote from said casing having a valve therein; and c. means for mechanically linking said valve to said means for selectively preventing fluid from the bottom of the well from flowing around the outside of the well through said body member so that said valve is opened when the flow of fluids around the outside of the well pipe through said body member is prevented.
Claim 3
Dependent Claim
13 words
The blowout preventer of claim 1 wherein said valve is a gate valve.
Claim 4
Dependent Claim
75 words
The blowout preventer of claim 1 wherein said means for selectively preventing fluid from the bottom of the well from flowing around the outside of the well pipe comprises a packing means and a piston means slidable upwardly and downwardly about said well pipe which can compress said packing means around the outside of said well pipe to prevent the flow of fluids around the outside of said well pipe upwardly through said body member.
Claim 5
Dependent Claim
33 words
The blowout preventer of claim 3 wherein rod means is connected to said piston means and to said valve means for opening said valve means when said piston means compresses said packing means.
Claim 6
Dependent Claim
155 words
A blowout preventer for use on a well comprising: a. an upright tubular body means adapted to receive an annular packing means to be constricted about a well pipe; b. an annular packing means located in said body means; c. a head means connected to the top of said body means for containing said packing means in said body means; d. piston means slidably received in said body means adapted to selectively constrict said packing means about a well pipe extending through said body means; e. casing pipe means connected to the lower end of said body means; f. diverter pipe means connected to said casing pipe means for diverting fluids contained in said casing to a location remote from said casing pipe means; g. valve means connected to said diverter pipe means; and h. rod means connected to said piston means to open said valve means when said piston means constricts said packing means.
Claim 7
Dependent Claim
155 words
A blowout preventer for use on a well comprising: a. an upright tubular body means adapted to receive an annular packing means to be constricted about a well pipe; b. an annular packing means located in said body means; c. a head means connected to the top of said body means for containing said packing means in said body means; d. piston means slidably received in said body means adapted to selectively constrict said packing means about a well pipe extending through said body means; e. casing pipe means connected to the lower end of said body means; f. diverter pipe means connected to said casing pipe means for diverting fluids contained in said casing to a location remote from said casing pipe means; g. valve means connected to said diverter pipe means; and h. rod means connected to said piston means to open said valve means when said piston means constricts said packing means.
Claim 8
Dependent Claim
14 words
The blowout preventer of claim 5 wherein said valve means is a gate valve.
Claim 9
Dependent Claim
31 words
The blowout preventer of claim 5 wherein said body means contains means for selectively forcing said piston means against said packing means to constrict said packing means around said well pipe.
Claim 10
Dependent Claim
25 words
The blowout preventer of claim 7 wherein said head means has a cylindrical hole in the top thereof through which said well pipe is received.
Claim 11
Independent Claim
83 words
A method for preventing blowouts in a well comprising: a. attaching a blowout preventer having a movable flow restricting means therein to a well casing pipe; b. connecting a pressure relief pipe to the casing pipe between the blowout preventer and the bottom of the well, said pressure relief line having a valve therein; and c. mechanically linking said movable internal flow restricting means of the blowout preventer to said valve so that said valve is opened when said blowout preventer is actuated.
Claim 12
Independent Claim
83 words
A method for preventing blowouts in a well comprising: a. attaching a blowout preventer having a movable flow restricting means therein to a well casing pipe; b. connecting a pressure relief pipe to the casing pipe between the blowout preventer and the bottom of the well, said pressure relief line having a valve therein; and c. mechanically linking said movable internal flow restricting means of the blowout preventer to said valve so that said valve is opened when said blowout preventer is actuated.
References Cited (Backward Citations)
US134348A
Cited
US662732A
Cited
US1285267A
Cited
US2188141A
Cited
US2609836A
Cited
US3589667A
Cited
US4098341A
Cited
US4098516A
Cited
US4192379A
Cited
US4317557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |