US3674090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for inhibiting the entrance of loose formation materials into a well bore
Assignee: Schlumberger Technology Corp
•
Filing: 1970-09-18
•
Granted: 1972-07-04
•
Expires: 1990-09-18
Abstract
Abstract As a representative mode of practicing the methods of the invention disclosed herein, a tubular screen is lowered through a production string and packer and positioned in a well bore adjacent to a perforated formation interval containing loose formation materials. To inhibit the production of such materials as the well is produced, a mixture of loose materials and a hardenable consolidating agent is then deposited around the tubular screen so as to fill the perforated well bore interval leaving only the upper portion of the screen projecting above the annular body of deposited materials. In this manner, once the consolidating agent hardens, production can be commenced through the permeable plug of consolidated materials into the screen and out its exposed upper end.
Inventors
- 👤 Harold J Urbanosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:02
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/025
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
214 words
A method for inhibiting the entrance of loose formation materials into a well bore having a production string disposed therein and terminating above a perforated interval of the well bore traversing an earth formation containing such loose formation materials and comprising the steps of: releasably coupling the upper end of a tubular screen having its lower end covered and a flow passage in its said upper end to the lower end of a suspension cable; lowering said tubular screen by said suspension cable through said production string and into said perforated interval therebelow to place said tubular screen therein with its said flow passage above the upper limit of said perforated interval and below the lower end of said production string; releasing said suspension cable from said tubular screen and withdrawing said suspension cable from said production string to allow said tubular member to assuMe a free position within said perforated interval; and discharging a mixture of particulate materials and an initially fluent hardenable consolidating agent into said perforated interval to form an annular plug of said mixture around said tubular screen below said flow passage before said consolidating agent hardens to consolidate said particulate materials into a hardened porous body for inhibiting the subsequent entrance of loose formation materials into said perforated interval.
Claim 2
Independent Claim
214 words
A method for inhibiting the entrance of loose formation materials into a well bore having a production string disposed therein and terminating above a perforated interval of the well bore traversing an earth formation containing such loose formation materials and comprising the steps of: releasably coupling the upper end of a tubular screen having its lower end covered and a flow passage in its said upper end to the lower end of a suspension cable; lowering said tubular screen by said suspension cable through said production string and into said perforated interval therebelow to place said tubular screen therein with its said flow passage above the upper limit of said perforated interval and below the lower end of said production string; releasing said suspension cable from said tubular screen and withdrawing said suspension cable from said production string to allow said tubular member to assuMe a free position within said perforated interval; and discharging a mixture of particulate materials and an initially fluent hardenable consolidating agent into said perforated interval to form an annular plug of said mixture around said tubular screen below said flow passage before said consolidating agent hardens to consolidate said particulate materials into a hardened porous body for inhibiting the subsequent entrance of loose formation materials into said perforated interval.
Claim 3
Dependent Claim
56 words
The method of claim 1 further including the step of: increasing the pressure of fluids in said perforated interval before said consolidating agent is hardened to force some of said mixture into perforations communicating with said earth formation with said perforated interval for anchoring said porous body in position therein once said consolidating agent has hardened.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein said particulate materials are substantially particles of sand.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein said particulate materials are substantially walnut shells.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein said consolidating agent is a single-component porous-setting plastic material.
Claim 7
Dependent Claim
25 words
The method of claim 5 wherein said consolidating agent is intimately mixed with said particulate materials before said mixture is introduced into said perforated interval.
Claim 8
Dependent Claim
38 words
The method of claim 1 wherein said consolidating agent is a multi-component plastic material and at least one of said plastic components are intimately mixed with said particulate materials before said mixture is introduced into said perforated interval.
Claim 9
Dependent Claim
28 words
The method of claim 7 wherein the remaining ones of said plastic components are introduced into said production string after said mixture is introduced into said perforated interval.
Claim 10
Dependent Claim
50 words
The method of claim 8 wherein said remaining plastic components are introduced into said perforated interval at an increased pressure to force some of said mixture into perforations communicating said earth formations with said perforated interval for anchoring said porous body in position therein once said consolidating agent has hardened.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |