EP0101855A1
Expired / Lapsed
EP
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Low density proppant for oil and gas wells
Assignee: Saint Gobain Abrasives Inc
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Filing: 1983-07-12
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Granted: —
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Expires: 2003-07-12
Abstract
Abstract A low density generally spherical sintered ceramic proppant containing chemically combined aluminum and silicon for use in oil and gas wells characterized by having a chemically combined aluminum content, calculated as aluminum oxide, of from 60 to 85% by weight, a density of less than 3.4 grams per cubic centimeter and a permeability of 10,000 psi of at least 30% of its permeability at 1,000 psi and a method for making same.
Inventors
- 👤 Joseph E. Patchett
- 👤 Robert A. Rowse
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 18:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/80; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C09K3/00; C09K3/14; C09K3/1409; C09K3/1418; E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A low density generally spherical sintered ceramic proppant containing chemically combined aluminum and silicon for use in oil and gas wells characterized by having a chemically combined aluminum content, calculated as aluminum oxide, of from 60 to 85% by weight, a density of less than 3.4 grams per cubic centimeter and a permeability of 10,000 psi of at least 30% of its permeability at 1,000 psi.
Claim 2
Dependent Claim
66 words
A low density generally spherical sintered ceramic proppant containing chemically combined aluminum and silicon for use in oil and gas wells characterized by having a chemically combined aluminum content, calculated as aluminum oxide, of from 60 to 85% by weight, a density of less than 3.4 grams per cubic centimeter and a permeability of 10,000 psi of at least 30% of its permeability at 1,000 psi.
Claim 3
Dependent Claim
24 words
A proppant according to claim 1, characterized by the fact that it has a chemically combined aluminum content of 65 to 75% by weight.
Claim 4
Dependent Claim
31 words
A proppant according to claim 1 or 2, characterized by the fact that it has a chemically combined silicon content, calculated at Si0 2 , of 10 to 30% by weight.
Claim 5
Dependent Claim
24 words
A proppant according to claim 3, characterized by the fact that it has a chemically combined silicon content of 18 to 28% by weight.
Claim 6
Dependent Claim
24 words
A proppant according to any one of the preceding claims, characterized by the fact that the silicon is contained in glass and mullite phases.
Claim 7
Dependent Claim
24 words
A proppant according to any one of the preceding claims, characterized by having an acid resistance at least equivalent to that of sintered bauxite.
Claim 8
Independent Claim
87 words
A method of making a low density generally spherical sintered ceramic proppant containing chemically combined aluminum and silicon for use in oil and gas wells which comprises forming a mixture comprising bauxite into pellets, said mixture having an average particle size of less than 10 microns, and firing said pellets, characterized by including in said mixture a high aluminous alumino-silicate clay in an amount sufficient to provide a fired product having a chemically combined aluminum content, calculated as aluminum oxide, of from 60 to 85% by weight.
Claim 9
Independent Claim
87 words
A method of making a low density generally spherical sintered ceramic proppant containing chemically combined aluminum and silicon for use in oil and gas wells which comprises forming a mixture comprising bauxite into pellets, said mixture having an average particle size of less than 10 microns, and firing said pellets, characterized by including in said mixture a high aluminous alumino-silicate clay in an amount sufficient to provide a fired product having a chemically combined aluminum content, calculated as aluminum oxide, of from 60 to 85% by weight.
Claim 10
Dependent Claim
29 words
A method according to claim 7, characterized by the fact that said high aluminous alumino-silicate clay comprises 40 to 90% by weight on an anhydrous basis of said mixture.
Claim 11
Dependent Claim
22 words
A method according to claim 7 or 8, characterized by the fact that said mixture further comprises organic or inorganic binder material.
References Cited (Backward Citations)
US2566117A
Cited
GB715882A
Cited
US2672671A
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US3437148A
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FR2280784A1
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DE2921336A1
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EP0087852A1
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