Patent US4358384A successfully refreshed from Google Patents.
US4358384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite grease for rock bit bearings
Assignee: Smith International Inc
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Filing: 1980-10-06
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Granted: 1982-11-09
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Expires: 2000-10-06
Abstract
Abstract A rock bit for drilling subterranean formations is lubricated with a grease composition comprising molybdenum disulfide particles in the range of from 6 to 14% by weight, copper particles in the range of from 3 to 9% by weight, a metal soap thickener in the range of from 4 to 10% by weight, and a balance of primarily hydrocarbon oil.
Inventors
- 👤 Alan L. Newcomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:03
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/06; E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/24; C10M2201/00; C10M2201/04; C10M2201/05; C10M2201/06; C10M2201/065; C10M2201/066; C10M2211/00; C10M2211/08; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
68 words
A grease composition for lubricating a rock bit for drilling subterranean formations comprising: copper particles in the range of from 3 to 9% by weight; molybdenum disulfide particles in the range of from 6 to 14% by weight; a metal soap wherein the metal is selected from the group consisting of aluminum, barium, calcium, lithium, sodium and strontium, and mixtures thereof; and a balance of primarily hydrocarbon oil.
Claim 2
Dependent Claim
68 words
A grease composition for lubricating a rock bit for drilling subterranean formations comprising: copper particles in the range of from 3 to 9% by weight; molybdenum disulfide particles in the range of from 6 to 14% by weight; a metal soap wherein the metal is selected from the group consisting of aluminum, barium, calcium, lithium, sodium and strontium, and mixtures thereof; and a balance of primarily hydrocarbon oil.
Claim 3
Dependent Claim
21 words
A composition as recited in claim 1 wherein the molybdenum disulfide is present in a proportion of about 11% by weight.
Claim 4
Dependent Claim
20 words
A composition as recited in claim 2 wherein the copper is present in a proportion of about 5% by weight.
Claim 5
Dependent Claim
43 words
A composition as recited in claim 3 wherein the metal soap comprises a mixture of a lithium soap and a calcium complex soap or an aluminum complex soap, said mixture being present in the range of from about 4 to 10% by weight.
Claim 6
Dependent Claim
20 words
A composition as recited in claim 1 wherein the copper is present in a proportion of about 5% by weight.
Claim 7
Dependent Claim
42 words
A composition as recited in claim 5 wherein the metal soap comprises a mixture of lithium soap and a calcium complex soap or an aluminum complex soap, said mixture being present in the range of from about 4 to 10% by weight.
Claim 8
Dependent Claim
34 words
A composition as recited in claim 1 wherein the molybdenum disulfide is present in a proportion of about 11% by weight and the copper is present in a proportion of about 5% by weight.
Claim 9
Dependent Claim
33 words
A composition as recited in claim 1 wherein the metal soap comprises a mixture of two metal soaps and the metal is selected from the group consisting of aluminum, calcium, lithium, and sodium.
Claim 10
Dependent Claim
25 words
A composition as recited in claim 8 wherein the mixture of soaps comprises a lithium soap and a calcium complex soap or aluminum complex soap.
Claim 11
Dependent Claim
21 words
A composition as recited in claim 8 wherein the molydenum disulfide is present in a proportion of about 11% by weight.
Claim 12
Dependent Claim
20 words
A composition as recited in claim 10 wherein the copper is present in a proportion of about 5% by weight.
Claim 13
Dependent Claim
20 words
A composition as recited in claim 8 wherein the copper is present in a proportion of about 5% by weight.
Claim 14
Dependent Claim
24 words
A composition as recited in claim 8 wherein the metal soap is present in the range of from about 4 to 10% by weight.
Claim 15
Dependent Claim
114 words
A rock bit for drilling subterranean formations comprising a bit body including a plurality of journal pins each having a bearing surface; a cutter cone mounted on each journal pin and including a bearing surface; a pressure compensated grease reservoir in communication with such bearing surfaces; and a grease in the grease reservoir and adjacent the bearing surfaces comprising: copper particles in the range of from 3 to 9% by weight; molybdenum disulfide particles in the range of from 6 to 14% by weight; a metal soap wherein the metal is selected from the group consisting of aluminum, barium, calcium, lithium, sodium, and strontium, and mixtures thereof; and a balance of primarily hydrocarbon oil.
Claim 16
Dependent Claim
114 words
A rock bit for drilling subterranean formations comprising a bit body including a plurality of journal pins each having a bearing surface; a cutter cone mounted on each journal pin and including a bearing surface; a pressure compensated grease reservoir in communication with such bearing surfaces; and a grease in the grease reservoir and adjacent the bearing surfaces comprising: copper particles in the range of from 3 to 9% by weight; molybdenum disulfide particles in the range of from 6 to 14% by weight; a metal soap wherein the metal is selected from the group consisting of aluminum, barium, calcium, lithium, sodium, and strontium, and mixtures thereof; and a balance of primarily hydrocarbon oil.
Claim 17
Dependent Claim
22 words
A rock bit as recited in claim 14 wherein the molybdenum disulfide is present in a proportion of about 11% by weight.
Claim 18
Dependent Claim
21 words
A rock bit as recited in claim 15 wherein the copper is present in a proportion of about 5% by weight.
Claim 19
Dependent Claim
44 words
A rock bit as recited in claim 16 wherein the metal soap comprises a mixture of a lithium soap and a calcium complex soap or an aluminum complex soap, said mixture being present in the range of from about 4 to 10% by weight.
Claim 20
Dependent Claim
21 words
A rock bit as recited in claim 14 wherein the copper is present in a proportion of about 5% by weight.
Claim 21
Dependent Claim
43 words
A rock bit as recited in claim 18 wherein the metal soap comprises a mixture of lithium soap and a calcium complex soap or an aluminum complex soap, said mixture being present in the range of from about 4 to 10% by weight.
Claim 22
Dependent Claim
35 words
A rock bit as recited in claim 14 wherein the molybdenum disulfide is present in a proportion of about 11% by weight and the copper is present in a proportion of about 5% by weight.
Claim 23
Dependent Claim
34 words
A rock bit as recited in claim 14 wherein the metal soap comprises a mixture of two metal soaps and the metal is selected from the group consisting of aluminum, calcium, lithium, and sodium.
Claim 24
Dependent Claim
26 words
A rock bit as recited in claim 21 wherein the mixture of soaps comprises a lithium soap and a calcium complex soap or aluminum complex soap.
Claim 25
Dependent Claim
22 words
A rock bit as recited in claim 21 wherein the molybdenum disulfide is present in a proportion of about 11% by weight.
Claim 26
Dependent Claim
21 words
A rock bit as recited in claim 23 wherein the copper is present in a proportion of about 5% by weight.
Claim 27
Dependent Claim
21 words
A rock bit as recited in claim 14 wherein the copper is present in a proportion of about 5% by weight.
Claim 28
Dependent Claim
25 words
A rock bit as recited in claim 14 wherein the metal soap is present in the range of from about 4 to 10% by weight.
Claim 29
Independent Claim
121 words
A method for lubricating a rock bit for drilling subterranean formations, the rock bit including a bit body and a plurality of cutter cones mounted on the bit body with journal bearings, comprising the steps of: evacuating a portion of the rock bit body including the journal bearings; and introducing grease into the evacuated portion of the rock bit body and journal bearings, said grease comprising: copper particles in the range of from 3 to 9% by weight; molybdenum disulfide particles in the range of from 6 to 14% by weight; a metal soap wherein the metal is selected from the group consisting of aluminum, barium, calcium, lithium, sodium and strontium, and mixtures thereof; and a balance of primarily hydrocarbon oil.
Claim 30
Independent Claim
121 words
A method for lubricating a rock bit for drilling subterranean formations, the rock bit including a bit body and a plurality of cutter cones mounted on the bit body with journal bearings, comprising the steps of: evacuating a portion of the rock bit body including the journal bearings; and introducing grease into the evacuated portion of the rock bit body and journal bearings, said grease comprising: copper particles in the range of from 3 to 9% by weight; molybdenum disulfide particles in the range of from 6 to 14% by weight; a metal soap wherein the metal is selected from the group consisting of aluminum, barium, calcium, lithium, sodium and strontium, and mixtures thereof; and a balance of primarily hydrocarbon oil.
Claim 31
Dependent Claim
21 words
A method as recited in claim 27 wherein the molybdenum disulfide is present in a proportion of about 11% by weight.
Claim 32
Dependent Claim
20 words
A method as recited in claim 27 wherein the copper is present in a proportion of about 5% by weight.
Claim 33
Dependent Claim
43 words
A method as recited in claim 29 wherein the metal soap comprises a mixture of a lithium soap and a calcium complex soap or an aluminum complex soap, said mixture being present in the range of from about 4 to 10% by weight.
Claim 34
Dependent Claim
20 words
A method as recited in claim 27 wherein the copper is present in a proportion of about 5% by weight.
Claim 35
Dependent Claim
42 words
A method as recited in claim 31 wherein the metal soap comprises a mixture of lithium soap and a calcium complex soap or an aluminum complex soap, said mixture being present in the range of from about 4 to 10% by weight.
Claim 36
Dependent Claim
34 words
A method as recited in claim 27 wherein the molybdenum disulfide is present in a proportion of about 11% by weight and the copper is present in a proportion of about 5% by weight.
Claim 37
Dependent Claim
33 words
A method as recited in claim 27 wherein the metal soap comprises a mixture of two metal soaps and the metal is selected from the group consisting of aluminum, calcium, lithium, and sodium.
Claim 38
Dependent Claim
25 words
A method as recited in claim 34 wherein the mixture of soaps comprises a lithium soap and a calcium complex coap or aluminum complex soap.
Claim 39
Dependent Claim
21 words
A method as recited in claim 34 wherein the molybdenum disulfide is present in a proportion of about 11% by weight.
Claim 40
Dependent Claim
20 words
A method as recited in claim 36 wherein the copper is present in a proportion of about 5% by weight.
Claim 41
Dependent Claim
20 words
A method as recited in claim 27 wherein the copper is present in a proportion of about 5% by weight.
Claim 42
Dependent Claim
24 words
A method as recited in claim 27 wherein the metal soap is present in the range of from about 4 to 10% by weight.
Claim 43
Dependent Claim
50 words
A grease composition for lubricating a rock bit comprising about 11% by weight molybdenum disulfide particles, about 5% by weight copper particles, about 2% by weight aluminum complex soap, about 4 to 5% by weight lithium soap, about 2% by weight silica powder and a balance of primarily hydrocarbon oil.
Claim 44
Dependent Claim
50 words
A grease composition for lubricating a rock bit comprising about 11% by weight molybdenum disulfide particles, about 5% by weight copper particles, about 2% by weight aluminum complex soap, about 4 to 5% by weight lithium soap, about 2% by weight silica powder and a balance of primarily hydrocarbon oil.
References Cited (Backward Citations)
US2543741A
Cited
GB710613A
Cited
US2754266A
Cited
US3063941A
Cited
US3423315A
Cited
US3652414A
Cited
US3784264A
Cited
US3801506A
Cited
US3935114A
Cited
SU658165A1
Cited
US4155860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |