Patent US299585A successfully refreshed from Google Patents.
US3710114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining communication of a perforated zone with a second zone
Assignee: Halliburton Co
•
Filing: 1971-01-25
•
Granted: 1973-01-09
•
Expires: 1991-01-25
Abstract
Abstract Method for locating the presence of passageways formed longitudinally of a borehole which communicates a production zone with a second zone, by placing isotopes adjacent the well casing at spaced apart locations above and below the perforated zone, and by placing spaced apart second isotopes adjacent the borehole annulus above and below the perforated zone of the borehole. The first spaced apart isotopes have a half life or decay rate substantially different from the second isotopes, and accordingly, translocation of either of the isotopes may be traced with radiation measuring apparatus. The apparatus includes means for affixing one isotope adjacent the casing, and further includes means for holding the remaining isotope adjacent the borehole wall, so that each of the different isotopes are horizontally spaced apart by the cement which attaches the casing to the borehole wall.
Inventors
- 👤 R Vann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:25
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/14; E; E21; E21B; E21B47/00; E21B47/005; E21B47/10; E21B47/11; E21B47/111
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
181 words
In a borehole having a casing cemented therein with the cement filling the annulus between the casing and the borehole wall, wherein the casing and cement have been perforated adjacent a potential production zone; the method of locating the presence of passageways formed externally of the casing and longitudinally of the borehole comprising the steps of: 1. placing a first isotope at spaced apart locations uphole and downhole of the perforations, said isotope having a known halflife, said isotope being placed at the interface formed between the cement and the casing wall; 2. placing a second isotope at spaced apart locations uphole and downhole of the perforations, said second isotope having a known half-life which is substantially different from said first isotope; said second isotope being placed at the interface formed between the cement and the borehole wall; 3. analyzing the borehole near the perforated zone to determine the translocation of either of the isotopes to thereby determine the length and direction of the passageway, and to determine the location of the passageway with respect to the casing and borehole wall.
Claim 2
Dependent Claim
181 words
In a borehole having a casing cemented therein with the cement filling the annulus between the casing and the borehole wall, wherein the casing and cement have been perforated adjacent a potential production zone; the method of locating the presence of passageways formed externally of the casing and longitudinally of the borehole comprising the steps of: 1. placing a first isotope at spaced apart locations uphole and downhole of the perforations, said isotope having a known halflife, said isotope being placed at the interface formed between the cement and the casing wall; 2. placing a second isotope at spaced apart locations uphole and downhole of the perforations, said second isotope having a known half-life which is substantially different from said first isotope; said second isotope being placed at the interface formed between the cement and the borehole wall; 3. analyzing the borehole near the perforated zone to determine the translocation of either of the isotopes to thereby determine the length and direction of the passageway, and to determine the location of the passageway with respect to the casing and borehole wall.
Claim 3
Dependent Claim
45 words
placing a second isotope at spaced apart locations uphole and downhole of the perforations, said second isotope having a known half-life which is substantially different from said first isotope; said second isotope being placed at the interface formed between the cement and the borehole wall;
Claim 4
Dependent Claim
45 words
placing a second isotope at spaced apart locations uphole and downhole of the perforations, said second isotope having a known half-life which is substantially different from said first isotope; said second isotope being placed at the interface formed between the cement and the borehole wall;
Claim 5
Dependent Claim
11 words
The method of claim 1 and further including the step of:
Claim 6
Dependent Claim
42 words
analyzing the borehole near the perforated zone to determine the translocation of either of the isotopes to thereby determine the length and direction of the passageway, and to determine the location of the passageway with respect to the casing and borehole wall.
Claim 7
Dependent Claim
42 words
analyzing the borehole near the perforated zone to determine the translocation of either of the isotopes to thereby determine the length and direction of the passageway, and to determine the location of the passageway with respect to the casing and borehole wall.
Claim 8
Dependent Claim
12 words
The method of claim 2, and further including the following additional step:
Claim 9
Dependent Claim
19 words
placing the second isotopes at radially spaced apart positions about the inside peripheral wall surface of the borehole wall;
Claim 10
Dependent Claim
19 words
placing the second isotopes at radially spaced apart positions about the inside peripheral wall surface of the borehole wall;
Claim 11
Dependent Claim
13 words
placing the isotopes in the borehole prior to cementing the casing into place.
Claim 12
Dependent Claim
13 words
placing the isotopes in the borehole prior to cementing the casing into place.
Claim 13
Dependent Claim
7 words
acidizing the perforated zone of the borehole;
Claim 14
Dependent Claim
7 words
acidizing the perforated zone of the borehole;
Claim 15
Dependent Claim
11 words
The method of claim 1, and further including the steps of:
Claim 16
Dependent Claim
22 words
placing the second isotope on a centralizer, with the centralizer being located above and a centralizer being located below the perforated zone.
Claim 17
Dependent Claim
22 words
placing the second isotope on a centralizer, with the centralizer being located above and a centralizer being located below the perforated zone.
Claim 18
Dependent Claim
16 words
placing the first isotopes within a cavity formed on the outside wall surface of the casing.
Claim 19
Dependent Claim
16 words
placing the first isotopes within a cavity formed on the outside wall surface of the casing.
Claim 20
Dependent Claim
18 words
placing the first isotopes at radially spaced apart positions about the outside peripheral wall surface of the casing.
Claim 21
Dependent Claim
18 words
placing the first isotopes at radially spaced apart positions about the outside peripheral wall surface of the casing.
Claim 22
Dependent Claim
36 words
adding an isotope to the cement as it is initially pumped into the borehole annulus so as to enable subsequent analysis to show the location of the top of the cement plug in the borehole annulus.
Claim 23
Dependent Claim
36 words
adding an isotope to the cement as it is initially pumped into the borehole annulus so as to enable subsequent analysis to show the location of the top of the cement plug in the borehole annulus.
Claim 24
Dependent Claim
11 words
The method of claim 1, and further including the steps of:
Claim 25
Dependent Claim
14 words
repeating step (3) to determine the presence of the passageways before fracturing the borehole.
Claim 26
Dependent Claim
14 words
repeating step (3) to determine the presence of the passageways before fracturing the borehole.
Claim 27
Dependent Claim
11 words
The method of claim 1, and further including the step of:
Claim 28
Dependent Claim
11 words
The method of claim 1, and further including the step of:
Claim 29
Dependent Claim
15 words
The method of claim 1 wherein the isotopes are protected by an oil soluble material.
Claim 30
Dependent Claim
15 words
The method of claim 1 wherein the isotopes are protected by a water soluble material.
Claim 31
Dependent Claim
23 words
The method of claim 1 wherein the isotopes are protected by a material which releases the isotope when contacted by an acid solution.
Claim 32
Dependent Claim
126 words
In a borehole having a casing cemented therein with the cement filling the annulus formed between the borehole wall and the casing, wherein the casing and cement have been perforated adjacent a potential production zone, apparatus for locating the presence of passageways formed externally of the casing and longitudinally of the borehole, comprising: means affixing a first isotope to the outer peripheral wall of the casing at spaced apart locations above and below the perforated zone; means affixing a second isotope to the inner wall surface of the borehole at spaced apart locations above and below the perforated zone; so that communication between the perforated zone and another zone spaced apart from the perforated zone can be determined by a gamma ray survey of the borehole.
Claim 33
Dependent Claim
126 words
In a borehole having a casing cemented therein with the cement filling the annulus formed between the borehole wall and the casing, wherein the casing and cement have been perforated adjacent a potential production zone, apparatus for locating the presence of passageways formed externally of the casing and longitudinally of the borehole, comprising: means affixing a first isotope to the outer peripheral wall of the casing at spaced apart locations above and below the perforated zone; means affixing a second isotope to the inner wall surface of the borehole at spaced apart locations above and below the perforated zone; so that communication between the perforated zone and another zone spaced apart from the perforated zone can be determined by a gamma ray survey of the borehole.
Claim 34
Dependent Claim
82 words
The apparatus of claim 11 wherein the means affixing the first isotope to the casing includes a collar, means forming a depression in said collar, a vehicle which is soluble in acid, said isotope being admixed with said vehicle and placed in said collar; and a casing centralizer having bows spaced radially thereabout, a body attached to one of said bows, a vehicle which is soluble in acid, said second isotope being placed in the last vehicle and placed in said body.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |