Patent US3982590A successfully refreshed from Google Patents.
US3982590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well bore cleaning device
Assignee: Halliburton Co
•
Filing: 1975-08-04
•
Granted: 1976-09-28
•
Expires: 1995-08-04
Abstract
Abstract A method and device is presented which cleans the mud filter cake from the walls of a well bore in an oil well by inducing vortex trails in a cement slurry as the slurry is pumped into the annulus between an oil well casing and the walls of the well bore. The device includes a plurality of resilient cylinders which are dimensioned to induce vortex trails in the slurry as it moves past the cylinders. The cylinders are fastened to a strap which may be wound about the exterior of the casing and clamped into place such that the cylinders are located in a random manner about the exterior of the casing which is to be cemented into place.
Inventors
- 👤 Donald W. Harriman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:17
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; E21B33/00; E21B33/10; E21B33/13; E21B33/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
134 words
An apparatus for use in an oil well for creating turbulence in a slurry flowing in an annulus between an oil well casing and the wall of the well bore, comprising: a strap for being helically wound around and attached to the exterior of said well casing; and, a plurality of cylindrical means fastened to said strap for extending radially outwardly and sized to extend partially into the annulus without making contact with the wall of the well bore when the casing is centered therein, said plurality of cylindrical means being spaced on said strap to provide a random pattern of said cylindrical means on the exterior of said well casing whereby cleaning of the wall of the well bore is effected by vortex trails induced in said slurry by said randomly positioned cylindrical
Claim 2
Independent Claim
134 words
An apparatus for use in an oil well for creating turbulence in a slurry flowing in an annulus between an oil well casing and the wall of the well bore, comprising: a strap for being helically wound around and attached to the exterior of said well casing; and, a plurality of cylindrical means fastened to said strap for extending radially outwardly and sized to extend partially into the annulus without making contact with the wall of the well bore when the casing is centered therein, said plurality of cylindrical means being spaced on said strap to provide a random pattern of said cylindrical means on the exterior of said well casing whereby cleaning of the wall of the well bore is effected by vortex trails induced in said slurry by said randomly positioned cylindrical
Claim 3
Dependent Claim
80 words
The apparatus of claim 1 wherein said plurality of cylindrical means are fastened to said strap linearly along the length of said strap with each one of said cylindrical means spaced a distance from the cylindrical means immediately following said one cylindrical means at a distance which is different from the distance to the cylindrical means which immediately precedes said one cylindrical means such that said plurality of cylindrical means form a random pattern around the periphery of said well
Claim 4
Dependent Claim
37 words
The apparatus of claim 2 wherein the length of each of said cylindrical means is greater than about two times the diameter of said cylindrical means, and less than about five times the diameter of said cylindrical
Claim 5
Dependent Claim
44 words
The apparatus of claim 1 wherein each cylindrical means of said plurality of cylindrical means comprises: a molded rubber cylinder; a metal ring embedded in the base of said rubber cylinder; and, a metal rivet passing through said metal ring for fastening said rubber
Claim 6
Independent Claim
142 words
An apparatus for cleaning mud filter cake from the well bore of an oil well responsive to a slurry flowing in an annulus between an oil well casing and the wall of the well bore, comprising: a strap helically wound around the exterior of the well casing; securing means for securing said strap to said oil well casing; and, a plurality of cylindrical means fastened along the length of said strap and sized to extend partially into the annulus without making contact with the walls of the well bore, said plurality of cylindrical means being spaced on said strap to provide a random pattern of said cylindrical means around the periphery of a portion of said oil well casing, thereby cleaning mud filter cake from the walls of the well bore by the action of vortex trails induced in said slurry by
Claim 7
Independent Claim
142 words
An apparatus for cleaning mud filter cake from the well bore of an oil well responsive to a slurry flowing in an annulus between an oil well casing and the wall of the well bore, comprising: a strap helically wound around the exterior of the well casing; securing means for securing said strap to said oil well casing; and, a plurality of cylindrical means fastened along the length of said strap and sized to extend partially into the annulus without making contact with the walls of the well bore, said plurality of cylindrical means being spaced on said strap to provide a random pattern of said cylindrical means around the periphery of a portion of said oil well casing, thereby cleaning mud filter cake from the walls of the well bore by the action of vortex trails induced in said slurry by
Claim 8
Dependent Claim
37 words
The apparatus of claim 5 wherein the length of each of said cylindrical means is greater than about two times the diameter of said cylindrical means, and less than about five times the diameter of said cylindrical
Claim 9
Dependent Claim
32 words
The apparatus of claim 6 wherein said plurality of cylindrical means are grouped in pairs, with the distance between successive pairs of cylindrical means being different than the distance between the individual
Claim 10
Dependent Claim
24 words
The apparatus of claim 7 wherein the distance between successive coils of said helically wound strap is about twice the outside diameter of the
Claim 11
Dependent Claim
47 words
The apparatus of claim 8 wherein each of said cylindrical means of said plurality of cylindrical means comprises: a molded rubber cylinder; a metal ring embedded in the base of said rubber cylinder; and, a metal rivet passing through said metal ring and said strap for fastening
Claim 12
Dependent Claim
79 words
A well bore cleaning device comprising: a strap; and a plurality of cylindrical means fastened to said strap wherein each of said cylindrical means include; a molded rubber cylinder selectively sized to extend partially into the well bore from the strap without making contact with the walls of the well bore, a metal ring embedded in the base of said rubber cylinder, and a metal rivet passing through said metal ring for fastening said rubber cylinder to said strap.
Claim 13
Dependent Claim
79 words
A well bore cleaning device comprising: a strap; and a plurality of cylindrical means fastened to said strap wherein each of said cylindrical means include; a molded rubber cylinder selectively sized to extend partially into the well bore from the strap without making contact with the walls of the well bore, a metal ring embedded in the base of said rubber cylinder, and a metal rivet passing through said metal ring for fastening said rubber cylinder to said strap.
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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |