US3842911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fracture acidizing a well formation
Assignee: Halliburton Co
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Filing: 1973-04-09
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Granted: 1974-10-22
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Expires: 1993-04-09
Abstract
Abstract The present invention relates to an improved method of fracture acidizing underground well formations so that the production of oil and gas therefrom is increased. By the method of the present invention high capacity flow channels are created and sustained in the formation, particularly in the area thereof adjacent to the well bore.
Inventors
- 👤 J Knox
- 👤 S Fredrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:40
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A METHOD FOR CREATIG HIGH CAPACITY FLOW CHANNELS IN A SUBTERRANEAN FORMATION WHICH CONSISTS ESSENTIALLY OF THE STEPS OF: A. INDUCING FRACTURES IN SAID FORMATION; B. INTRODUCING PROPPING AGENTS SELECTED FROM THE GROUP CONSISTING OF SAND, GLAS BEADS, WALNUT HULLS, AND MIXTURES THEREOF INTO SAID FRACTURES WHILE MAINTAINING SAID FRACTURES IN AN OPEN POSITION; C. ALLOWING SAID FRACTURES TO COMPLETELY CLOSE ON SAID PROPPIG AGENTS; AND THEREAFTER D. FLOWING ACID INTO SAID FRACTURES UNDER CONDITIONS WHEREBY SAID FRACTURES REMAIN CLOSED ON SAID PROPPING AGENTS TO THEREBY FORM SAID HIGH CAPACITY FLOW CHANNELS IN SAID FORMATION.
Claim 2
Independent Claim
95 words
A METHOD FOR CREATIG HIGH CAPACITY FLOW CHANNELS IN A SUBTERRANEAN FORMATION WHICH CONSISTS ESSENTIALLY OF THE STEPS OF: A. INDUCING FRACTURES IN SAID FORMATION; B. INTRODUCING PROPPING AGENTS SELECTED FROM THE GROUP CONSISTING OF SAND, GLAS BEADS, WALNUT HULLS, AND MIXTURES THEREOF INTO SAID FRACTURES WHILE MAINTAINING SAID FRACTURES IN AN OPEN POSITION; C. ALLOWING SAID FRACTURES TO COMPLETELY CLOSE ON SAID PROPPIG AGENTS; AND THEREAFTER D. FLOWING ACID INTO SAID FRACTURES UNDER CONDITIONS WHEREBY SAID FRACTURES REMAIN CLOSED ON SAID PROPPING AGENTS TO THEREBY FORM SAID HIGH CAPACITY FLOW CHANNELS IN SAID FORMATION.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the acid is selected from the group consisting of aqueous solutions of hydrochloric acid, acetic acid, formic acid, hydrofluoric acid and mixtures thereof.
Claim 4
Dependent Claim
10 words
The method of claim 1 wherein the acid is retarded.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |