Patent US3789689A successfully refreshed from Google Patents.
US3789689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutoff device for wells
Assignee: Individual
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Filing: 1972-04-20
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Granted: 1974-02-05
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Expires: 1992-04-20
Abstract
Abstract A device for shutting-off well drilling and pipe strings and the like has a pair of opposed frame members arranged with a string between them and displaceable with respect to one another. Two pairs of jaws are mounted on the frame members for guidingly engaging the string when the frame members are displaced toward one another. Each frame member is provided with a fluid motor having an I-beam mounted on the piston thereof and arranged for movement with respect to the I-beam of the opposed frame member. These I-beams move relatively to the respective frame member for flattening a portion of the string to shut off same. Locking devices are provided on the frame members for locking themselves together after displacement toward one another, thus preventing the frame members from moving away from one another while the string is being flattened by the fluid motors and I-beams.
Inventors
- 👤 O Mace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:07
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/08; B; B21; B21D; B21D41/00; B21D41/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
76 words
A device for shutting-off well drilling and pipe strings, comprising, in combination: a. a pair of opposed, separate frame membeers arranged with a string between them and displaceable toward and away from the string and one another; b. means mounted on said frame members for selectively displacing said frame members toward one another; and c. means for relative movement with respect to the frame members for flattening a portion of the string to shut off same.
Claim 2
Independent Claim
76 words
A device for shutting-off well drilling and pipe strings, comprising, in combination: a. a pair of opposed, separate frame membeers arranged with a string between them and displaceable toward and away from the string and one another; b. means mounted on said frame members for selectively displacing said frame members toward one another; and c. means for relative movement with respect to the frame members for flattening a portion of the string to shut off same.
Claim 3
Dependent Claim
60 words
A structure as defined in claim 1, wherein the frame members are each formed by a pair of spaced, parallel side rails and an end rail connected to the side rails at one end portion of each, the other end portion of each side rail extending co-directionally and toward the side rails of the opposed frame member for mating therewith.
Claim 4
Dependent Claim
52 words
A structure as defined in claim 2, wherein the other end portions of the side rails of one frame member are tapered toward the opposed side rails, and the other end portions of the side rails of the other frame member are provided with cavity means for receiving the tapered end portions.
Claim 5
Independent Claim
218 words
A device for shutting-off well drilling and pipe strings, comprising, in combination: a. a pair of opposed frame members arranged with a string between them, and displaceable with respect to one another, each of the frame members formed by a pair of spaced, parallel side rails and an end rail connected to the side rails at one end portion of each, the other end portion of each side rail extending co-directionally and toward the side rails of the opposed frame member for mating therewith, the other end portions of the side rails of one frame member being tapered toward the opposed side rails, and the other end portions of the side rails of the other frame member being provided with cavity means for receiving the tapered end portions, a line being attached to at least one of said tapered end portions and a pulley being arranged in an opening provided in the mating one of said other side rais, said line being arranged around said pulley for displacing said frame members toward one another; b. means mounted on said frame members for guidingly engaging the string when said frame members are displaced toward one another; and c. means for relative movement with respect to the frame members for flattening a portion of the string to shut off same.
Claim 6
Independent Claim
218 words
A device for shutting-off well drilling and pipe strings, comprising, in combination: a. a pair of opposed frame members arranged with a string between them, and displaceable with respect to one another, each of the frame members formed by a pair of spaced, parallel side rails and an end rail connected to the side rails at one end portion of each, the other end portion of each side rail extending co-directionally and toward the side rails of the opposed frame member for mating therewith, the other end portions of the side rails of one frame member being tapered toward the opposed side rails, and the other end portions of the side rails of the other frame member being provided with cavity means for receiving the tapered end portions, a line being attached to at least one of said tapered end portions and a pulley being arranged in an opening provided in the mating one of said other side rais, said line being arranged around said pulley for displacing said frame members toward one another; b. means mounted on said frame members for guidingly engaging the string when said frame members are displaced toward one another; and c. means for relative movement with respect to the frame members for flattening a portion of the string to shut off same.
Claim 7
Dependent Claim
36 words
A structure as defined in claim 4, wherein said frame members are further provided with means for locking themselves together after displacement toward one another for preventing displacement of the frame members away from one another.
Claim 8
Dependent Claim
67 words
A structure as defined in claim 5, wherein the locking means includes a latch member arranged in at least one of the tapered end portions, and a means arranged in the mating one of the other end portions of the side rails opposed to the tapered end portions for engaging with the latch member, said latch member engaging with the engaging means by the force of gravity.
Claim 9
Dependent Claim
43 words
A structure as defined in claim 4, wherein the relative movement means includes opposed fluid motors mounted on said frame members, and flattening means connected to the fluid motors for moving toward and away from the flattening means of the opposed fluid motor.
Claim 10
Dependent Claim
39 words
A structure as defined in claim 7, whErein the fluid motors are cylinders and pistons having piston rods, and the flattening means is I-beams, each beam having a web attached to a free end of a respective piston rod.
Claim 11
Dependent Claim
41 words
A structure as defined in claim 4, wherein the guidingly engaging means includes two opposed pairs of jaws mounted on the frame members for movement therewith, the two opposed pairs of jaws arranged spaced from opposite sides of the frame members.
Claim 12
Dependent Claim
36 words
A structure as defined in claim 1, wherein said frame members are further provided with means for locking themselves together after displacement toward one another for preventing displacement of the frame members away from one another.
Claim 13
Independent Claim
136 words
A device for shutting-off well drilling and pipe strings, comprising, in combination: a. a pair of opposed frame members arranged with a string between them, and displaceable with respect to one another, said frame members being provided with means for locking themselves together after displacement toward one another for preventing displacement of the frame members away from one another, the locking means including at least one latch member arranged in one of said frame members, and a means arranged in the other of said frame members for engaging with the latch member; b. means mounted on said frame members for guidingly engaging the string when said frame members are displaced toward one another; and c. means for relative movement with respect to the frame members for flattening a portion of the string to shut off same.
Claim 14
Independent Claim
136 words
A device for shutting-off well drilling and pipe strings, comprising, in combination: a. a pair of opposed frame members arranged with a string between them, and displaceable with respect to one another, said frame members being provided with means for locking themselves together after displacement toward one another for preventing displacement of the frame members away from one another, the locking means including at least one latch member arranged in one of said frame members, and a means arranged in the other of said frame members for engaging with the latch member; b. means mounted on said frame members for guidingly engaging the string when said frame members are displaced toward one another; and c. means for relative movement with respect to the frame members for flattening a portion of the string to shut off same.
Claim 15
Dependent Claim
43 words
A structure as defined in claim 11 wherein the relative movement means includes opposed fluid motors mounted on said frame members, and flattening means connected to the fluid motors for moving toward and away from the flattening means of the opposed fluid motor.
Claim 16
Dependent Claim
39 words
A structure as defined in claim 12, wherein the fluid motors are cylinders and pistons having piston rods, and the flattening means is I-beams, each beam having a web attached to a free end of a respective piston rod.
Claim 17
Dependent Claim
38 words
A structure as defined in claim 13, wherein the guidingly engaging means includes two opposed pairs of jaws mounted on the frame members for movement therewith, opposed pairs being arranged spaced from opposite sides of the frame members.
Claim 18
Independent Claim
111 words
A device for shutting-off well drilling and pipe strings, comprising, in combination: a. a pair of opposed frame members arranged with a string between them, and displaceable with respect to one another; b. means mounted on said frame members for guidingly engaging the string when said frame members are displaced toward one another; and c. means for relative movement with respect to the frame members for flattening a portion of the string to shut off same, the relative movement means including opposed fluid motors mounted on said frame members, and flattening means connected to the fluid motors for moving toward and away from the flattening means of the opposed fluid motor.
Claim 19
Independent Claim
111 words
A device for shutting-off well drilling and pipe strings, comprising, in combination: a. a pair of opposed frame members arranged with a string between them, and displaceable with respect to one another; b. means mounted on said frame members for guidingly engaging the string when said frame members are displaced toward one another; and c. means for relative movement with respect to the frame members for flattening a portion of the string to shut off same, the relative movement means including opposed fluid motors mounted on said frame members, and flattening means connected to the fluid motors for moving toward and away from the flattening means of the opposed fluid motor.
Claim 20
Dependent Claim
39 words
A structure as defined in claim 15, wherein the fluid motors are cylinders and pistons having piston rods, and the flattening means is I-beams, each beam having a web attached to a free end of a respective piston rod.
Claim 21
Dependent Claim
38 words
A structure as defined in claim 15, wherein the guidingly engaging means includes two opposed pairs of jaws mounted on the frame members for movement therewith, opposed pairs being arranged spaced from opposite sides of the frame members.
Claim 22
Dependent Claim
26 words
A structure as defined in claim 15, wherein the guidingly engaging means includes two opposed pairs of jaws mounted on the frame members for movement therewith.
Claim 23
Dependent Claim
22 words
A structure as defined in claim 18, wherein opposed pairs of jaws are arranged spaced from opposite sides of the frame members.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |