USRE33855E - Terpolymer composition for aqueous drilling fluids - Google Patents
Terpolymer composition for aqueous drilling fluids Download PDFInfo
- Publication number
- USRE33855E USRE33855E US07/286,887 US28688788A USRE33855E US RE33855 E USRE33855 E US RE33855E US 28688788 A US28688788 A US 28688788A US RE33855 E USRE33855 E US RE33855E
- Authority
- US
- United States
- Prior art keywords
- amount
- brown coal
- lignin
- present
- terpolymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
- C08F220/585—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
Definitions
- Resinex a sulfonated lignite complexed with a sulfonated phenolic resin, is a commercially available high temperature, high pressure fluid loss additive for drilling muds. It is effective in controlling filtration properties in both fresh sea water muds with high concentrations of soluble calcium.
- a method for improving high temperature fluid loss and rheology stabilization of high calcium brine clay-containing oil well drilling fluids which comprises adding thereto a stabilizing amount of a water-soluble terpolymer composition comprising: polymer prepared by polymerizing the following monomer ingredients:
- compositions containing lignin, modified lignin, brown coal or modified brown coal in an amount ranging between 5-95% with the lignin, modified lignin, brown coal or modified brown coal having been present during the polymerization of the water-soluble polymer.
- lignite is a brown coal in which the original structure of the wood is still recognizable. It is commonly known that lignite may be reacted with sulfuric acid or SO 3 to produce a sulfonated lignite.
- SO 3 sulfuric acid
- lignin is a byproduct formed in the processing of wood for the manufacture of paper.
- leonardite is a naturally oxidized product with higher oxygen and moisture content than lignite.
- humic acid which is a complexed polycyclic polycarboxylic acid which can be converted into its salt form e.g. alkali metal, ammonia or amine, or it can be sulfonated.
- salt form e.g. alkali metal, ammonia or amine
- sulfonated e.g. sodium bicarbonate
- Such products as well as other derivatives of humic acid are described in U.S. Pat. No. 3,266,887. The disclosure of which is incorporated herein by reference.
- the polymer portion of the compostion used to practice the invention is prepared in accordance with the teachings of U.S. Pat. No. 4,502,964.
- the reaction temperature and times may be varied with the reaction time being temperature dependent, e.g. the higher the temperature the shorter the reaction time. Generally, temperatures within the range of about 35°-80° C. may be employed. Although, the temperature and reaction times vary, they are further governed by the amount of catalyst as well as the ratio of the reactants. Often, routine experimentation must be used to optimize the process.
- compositions are prepared by conducting the polymerization in the presence of the lignin, modified lignin, brown coal or modified brown coal.
- the amount of brown coal combined with the polymer as indicated ranges between 5-95%, preferably 20-50% and most preferably 20-35% by weight.
- One of the surprising facts of the invention is that the entire broad range of lignin, modified lignin, brown coal or modified brown coal used shows excellent results are achieved in providing fluid loss control.
- composition of this invention provides good results at dosages ranging between 0.5-10 lbs. per barrel.
- a preferred dosage range is between 1-5 lbs. per barrel.
- the dosages are varied depending upon the conditions and type of formation being treated.
- the products of the invention provided effective and improved performance as fluid loss additive in oil field drilling fluid. These products show especially improved performance at elevated temperatures.
- These additives may be used in a wide range of drilling fluid types including the following:
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Dispersion Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A method of improving high temperature fluid loss and rheology stabilization of high calcium brine clay-containing oil well drilling fluids which comprises adding thereto a stabilizing amount of a water-soluble terpolymer composition comprising:
______________________________________
Ingredients % by weight
______________________________________
NaAMPS 72-3.8
N,N-dimethylacrylamide
13.5-0.7
Acrylonitrile 9.5-0.5
______________________________________
said composition containing lignin, modified lignin, brown coal or modified brown coal in an amount ranging between 5-95% with the lignin, modified lignin, brown coal or modified brown coal having been present during the polymerization of the water-soluble polymer.
Description
.Iadd.This application is a divisional reissue application of U.S. Reissue Application Ser. No. 144,260, filed Jan. 15, 1988. .Iaddend.
A serious problem is encountered when clay-based oil well drilling fluids are subjected to conditions of high temperature and high pressure in conjunction with utilization of high calcium-containing brines which are used to prepare these drilling fluids. When these conditions exist, conventional drilling fluid polymeric additives such as acrylamide polymers, when used as stabilizers for these fluids, tend to be rendered ineffective.
In U.S. Pat. No. 4,502,964, there is shown an improved high temperature fluid loss additive and rheology stabilizer for high temperature oil well drilling fluids which comprises a water-soluble terpolymer having the following compositions:
______________________________________
Mole %
Ingredients Preferred General
______________________________________
2-acrylamido-2-methylpropane-
53.5 51-59
sulfonic acid, sodium salt (AMPS.sup.1)
N,N-dimethylacrylamide
16.6 6-28
acrylonitrile 29.8 20-35
______________________________________
.sup.1 AMPS, a registered trademark of Lubrisol, Inc., is
2acrylamido-2-methylpropane sulfonic acid. Na salt.
These polymers are further described in this patent as having a molecular weight below one million. They preferably have a molecular weight range within the range of 10,000-500,000. The other properties of these polymers and their efficacy as high temperature fluid loss additives are further described in this patent. The disclosure of U.S. Pat. No. 4,502,964 is incorporated into this disclosure by reference and forms a part hereof.
Resinex, a sulfonated lignite complexed with a sulfonated phenolic resin, is a commercially available high temperature, high pressure fluid loss additive for drilling muds. It is effective in controlling filtration properties in both fresh sea water muds with high concentrations of soluble calcium.
If it were possible to provide high temperature fluid loss additives having superior activity to the activity of either the polymers described U.S. Pat. No. 4,502,964 or the Resinex additive, an advance in the art would be afforded.
In accordance with the invention, there is provided a method for improving high temperature fluid loss and rheology stabilization of high calcium brine clay-containing oil well drilling fluids which comprises adding thereto a stabilizing amount of a water-soluble terpolymer composition comprising: polymer prepared by polymerizing the following monomer ingredients:
______________________________________
Ingredients % by weight
______________________________________
NaAMPS 72-3.8
N,N-dimethylacrylamide
13.5-0.7
Acrylonitrile 9.5-0.5
______________________________________
said compositions containing lignin, modified lignin, brown coal or modified brown coal in an amount ranging between 5-95% with the lignin, modified lignin, brown coal or modified brown coal having been present during the polymerization of the water-soluble polymer.
A variety of material falling within this generic description may be used in the practice of the invention. One of the most common materials is lignite which is a brown coal in which the original structure of the wood is still recognizable. It is commonly known that lignite may be reacted with sulfuric acid or SO3 to produce a sulfonated lignite. A related product that may also be substituted is lignin which is a byproduct formed in the processing of wood for the manufacture of paper.
It can be modified to provide a lignosulfonate or a cyano derivative as described in U.S. Pat. No. 3,639,263.
Another related product is leonardite which is a naturally oxidized product with higher oxygen and moisture content than lignite.
Another brown coal-type material is humic acid which is a complexed polycyclic polycarboxylic acid which can be converted into its salt form e.g. alkali metal, ammonia or amine, or it can be sulfonated. Such products as well as other derivatives of humic acid are described in U.S. Pat. No. 3,266,887. The disclosure of which is incorporated herein by reference.
The polymer portion of the compostion used to practice the invention is prepared in accordance with the teachings of U.S. Pat. No. 4,502,964. The reaction temperature and times may be varied with the reaction time being temperature dependent, e.g. the higher the temperature the shorter the reaction time. Generally, temperatures within the range of about 35°-80° C. may be employed. Although, the temperature and reaction times vary, they are further governed by the amount of catalyst as well as the ratio of the reactants. Often, routine experimentation must be used to optimize the process.
As indicated, the compositions are prepared by conducting the polymerization in the presence of the lignin, modified lignin, brown coal or modified brown coal.
The amount of brown coal combined with the polymer as indicated ranges between 5-95%, preferably 20-50% and most preferably 20-35% by weight.
One of the surprising facts of the invention is that the entire broad range of lignin, modified lignin, brown coal or modified brown coal used shows excellent results are achieved in providing fluid loss control.
The composition of this invention provides good results at dosages ranging between 0.5-10 lbs. per barrel. A preferred dosage range is between 1-5 lbs. per barrel. The dosages are varied depending upon the conditions and type of formation being treated.
______________________________________
Method of Preparing the Compositions of the Invention
Composition I
Component Weight Percent
______________________________________
(1) Deionized Water 55.77
(2) Causticized Lignite
9.53
(3) 50% Na AMPS Solution
28.87
(4) Dimethylacrylamide
2.71
(5) Acrylonitrile 1.90
(6) EDTA .10
(7) Sodium Bisulfite
.56
(8) Ammonium Persulfate
.56
100.00
______________________________________
Charge (1) and (2) to reactor with stirring, heat to 60° C. and continue stirring at 60° C. for 30 minutes. Charge (3)-(6). Close in reactor, pull vacuum, break with nitrogen, repeat. Charge catalyst pair (7) and (8), portionwise (approximately 0.14 weight percent) at one hour intervals. A small exotherm (10°-15° C.) may occur and the solution should gain viscosity. It appears that a Brookfield viscosity greater than 200 centipoise is necessary for peak product performance. Continue adding catalyst doses until residual monomer levels are at acceptable levels (less than 1% for AMPS and dimethylacrylamide, and less than 25 ppm for acrylonitrile). Typical residuals for open pot laboratory reactions are as follows:
______________________________________ Monomer Residual ______________________________________ ACN 1.7 μg/g AMPS .07% diMeAcAM <.05% ______________________________________
Using this general preparative method, the following compositions in Table I were prepared:
TABLE I
______________________________________
Product Compositions
Weight Percents
Composition N,N-dimethyl- Lig-
No. NaAMPS acrylamide Acrylonitrile
nite
______________________________________
1 50.5 9.5 6.7 33.3
2 60.7 11.4 7.9 20
3 72.0 13.5 9.5 5
4 3.8 0.7 0.5 95
5 54.3 12.4 -- 33.3
6 47.2 18.4 1.1 33.3
7 48.6 14.7 3.4 33.3
8 51.6 6.7 8.4 33.3
9 56.9 2.1 7.7 33.3
10 59.3 -- 7.4 33.3
11 66.7 -- -- 33.3
______________________________________
The following variations contain the same base polymer with different lignin/lignite variations:
NaAMPS (50.5%), N,N-dimethylacrylamide (9.5%), acrylonitrile (6.5%), lignin/lignite variation (33.3%).
______________________________________ Composition No. Lignin/Lignite Variation ______________________________________ 12 Ca lignosulfonate 13 Na lignosulfonate 14 Lignin 15 Sulfomethylated lignite 16 Sulfonated lignite ______________________________________
The variations were tested in a high temperature, high pressure fluid loss additive test which is described in detail in the American Petroleum Institute publication RP13(B). Improved fluid loss control was observed for the variations tested. The results in both unaged muds and muds aged overnight at 350° F. are shown in Table II. The base mud used for testing consisted of:
______________________________________ 280 g water 15 g bentonite 40 g kaolinite 4 g chrome lignosulfonate 294 g barite 10.6 g sea salt ______________________________________
Using the above test procedures, the compositions of Table I were evaluated with the results being shown in Table II.
TABLE II
______________________________________
Composi-
Concentration
HTHP Fluid Loss (ml)
tion No.
(lbs/bbl Unaged Aged 350° F.
______________________________________
Blank -- dry @ 27 min dry @ 28 min
1 2 80 70
2 2 64 62
3 2 76 66
4 2 142 134
5 2 90 70
6 2 78 60
7 2 74 62
8 2 96 66
9 2 98 94
10 2 112 94
11 2 84 70
12 2 dry @ 29 min 30 sec
82
13 2 134 102
14 2 dry @ 27 min 96
15 2 dry @ 29 min 30 sec
124
16 2 124 96
______________________________________
The products of the invention, either in solution or in dry form, provided effective and improved performance as fluid loss additive in oil field drilling fluid. These products show especially improved performance at elevated temperatures. These additives may be used in a wide range of drilling fluid types including the following:
(1) fresh water muds
(2) fresh water muds contaminated with calcium or other multivalent ion
(3) sea water muds
(4) gypsum muds
(5) lime muds
Claims (3)
- 20-35% by weight..]. .Iadd.4. A composition comprising:terpolymer segments comprising units derived from acrylonitrile, N,N-dimethylacrylamide, and 2-acrylamido-2-methylpropane sulfonic acid, sodium salt wherein said acrylonitrile is present in an amount up to about 9.5%, said N,N-dimethyacrylamide is present in an amount up to about 18.4% and said 2-acrylamido-2-methylpropane sulfonic acid, sodium salt is present in an amount of about 3.8% to about 72%;from about 5% to about 95% by weight of a lignin, modified lignin, brown coal or modified brown coal selected from the group consisting of lignites, sulfonated lignites, lignins, leonardites, lignosulfonates, humic acids, sulfonated humic acids, and the salts of each;said terpolymer segments being formed in the presence of said material.
- .Iaddend. .Iadd.5. A composition comprising:terpolymer segments comprising units derived from acrylonitrile, N,N-dimethylacrylamide, and 2-acrylamido-2-methylpropane sulfonic acid, sodium salt wherein said acrylonitrile is present in an amount up to about 9.5%, said N,N-dimethylacrylamide is present in an amount up to about 18.4%, and said 2-acrylamido-2-methylpropane sulfonic acid, sodium salt is present in an amount of about 3.8% to about 72%;from about 20% to about 35% by weight of a lignin, modified lignin, brown coal or modified brown coal selected from the group consisting of lignites, sulfonated lignites, lignins, leonardites, lignosulfonates, humic acids, sulfonated humic acids, and the salts of each;said terpolymer segments being formed in the presence of said material.
- .Iaddend. .Iadd.6. A composition comprising:terpolymer segments comprising units derived from acrylonitrile, N,N-dimethylacrylamide, and 2-acrylamido-2-methylpropane sulfonic acid, sodium salt, wherein said acrylonitrile is present in an amount of at least about 0.5% to about 9.5%, said N,N-dimethylacrylamide is present in an amount of at least about 0.7% to about 13.5% and said 2-acrylamido-2-methylpropane sulfonic acid, sodium salt is present in an amount of at least about 3.8% to about 72%;from about 5% to about 95% by weight of a lignin, modified lignin, brown coal or modified brown coal selected from the group consisting of lignites, sulfonated lignites, lignins, leonardites, lignosulfonates, humic acids, sulfonated humic acids, and the salts of each;said terpolymer segments being formed in the presence of said material. .Iaddend. .Iadd.7. A composition comprising:terpolymer segments comprising units derived from acrylonitrile, N,N-dimethylacrylamide, and 2-acrylamido-2-methylpropane sulfonic acid, sodium salt, wherein said acrylonitrile is present in an amount of at least about 0.5% to about 9.5%, said N,N-dimethylacrylamide is present in an amount of at least about 0.7% to about 13.5% and said 2-acrylamido-2-methylpropane sulfonic acid, sodium salt is present in an amount of at least about 3.8% to about 72%;from about 20% to about 35% by weight of a lignin, modified lignin, brown coal or modified brown coal selected from the group consisting of lignites sulfonated lignites, lignins, leonardites, lignosulfonates, humic acids, sulfonated humic acids, and the salts of each;said terpolymer segments being formed in the presence of said material. .Iaddend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/286,887 USRE33855E (en) | 1986-04-07 | 1988-12-20 | Terpolymer composition for aqueous drilling fluids |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/848,527 US4678591A (en) | 1986-04-07 | 1986-04-07 | Terpolymer composition for aqueous drilling fluids |
| US07/144,260 USRE33856E (en) | 1986-04-07 | 1988-01-15 | Terpolymer compositions for aqueous drilling fluids |
| US07/286,887 USRE33855E (en) | 1986-04-07 | 1988-12-20 | Terpolymer composition for aqueous drilling fluids |
Related Parent Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/848,527 Reissue US4678591A (en) | 1986-04-07 | 1986-04-07 | Terpolymer composition for aqueous drilling fluids |
| US07/144,260 Division USRE33856E (en) | 1986-04-07 | 1988-01-15 | Terpolymer compositions for aqueous drilling fluids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| USRE33855E true USRE33855E (en) | 1992-03-24 |
Family
ID=27386065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US07/286,887 Expired - Lifetime USRE33855E (en) | 1986-04-07 | 1988-12-20 | Terpolymer composition for aqueous drilling fluids |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | USRE33855E (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5728653A (en) * | 1992-01-31 | 1998-03-17 | Institut Francais Du Petrole | Method for inhibiting reactive argillaceous formations and use thereof in a drilling fluid |
| CN114891489A (en) * | 2022-03-24 | 2022-08-12 | 长江大学 | Non-sulfonated high-temperature-resistant water-based drilling fluid |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2650197A (en) * | 1953-04-21 | 1953-08-25 | Henry W Rahn | Well drilling composition and method of manufacture thereof |
| US2718497A (en) * | 1950-11-03 | 1955-09-20 | Union Oil Co | Drilling muds |
| US2935504A (en) * | 1955-10-10 | 1960-05-03 | Puget Sound Pulp And Timber Co | Process of improving the effectiveness of the components of spent sulfite liquor andthe products thereof |
| US3266887A (en) * | 1962-10-29 | 1966-08-16 | Nalco Chemical Co | Ore pelletization process and products |
| US3639263A (en) * | 1968-07-31 | 1972-02-01 | Nalco Chemical Co | Corrosion inhibition with a tannin, cyanohydrinated lignosulfonate, and an inorganic metal salt composition |
| US3700728A (en) * | 1968-01-04 | 1972-10-24 | Canadian Patents Dev | Solubilization of humic acids, lignites and coals |
| US3985659A (en) * | 1975-02-24 | 1976-10-12 | Georgia-Pacific Corporation | Drilling fluid composition |
| US4374738A (en) * | 1980-06-09 | 1983-02-22 | Georgia-Pacific Corporation | Drilling fluid composition |
| EP0072445A2 (en) * | 1981-07-27 | 1983-02-23 | B W Mud Limited | Temperature stable drilling fluids |
| US4502966A (en) * | 1983-09-09 | 1985-03-05 | Nalco Chemical Company | Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids |
| US4502965A (en) * | 1983-09-09 | 1985-03-05 | Nalco Chemical Company | Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids |
| US4502964A (en) * | 1983-09-09 | 1985-03-05 | Nalco Chemical Company | Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids |
| US4547299A (en) * | 1984-03-15 | 1985-10-15 | Milchem Incorporated | Drilling fluid containing a copolymer filtration control agent |
| US4650593A (en) * | 1977-09-19 | 1987-03-17 | Nl Industries, Inc. | Water-based drilling fluids having enhanced fluid loss control |
| US4676317A (en) * | 1986-05-13 | 1987-06-30 | Halliburton Company | Method of reducing fluid loss in cement compositions which may contain substantial salt concentrations |
-
1988
- 1988-12-20 US US07/286,887 patent/USRE33855E/en not_active Expired - Lifetime
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2718497A (en) * | 1950-11-03 | 1955-09-20 | Union Oil Co | Drilling muds |
| US2650197A (en) * | 1953-04-21 | 1953-08-25 | Henry W Rahn | Well drilling composition and method of manufacture thereof |
| US2935504A (en) * | 1955-10-10 | 1960-05-03 | Puget Sound Pulp And Timber Co | Process of improving the effectiveness of the components of spent sulfite liquor andthe products thereof |
| US3266887A (en) * | 1962-10-29 | 1966-08-16 | Nalco Chemical Co | Ore pelletization process and products |
| US3700728A (en) * | 1968-01-04 | 1972-10-24 | Canadian Patents Dev | Solubilization of humic acids, lignites and coals |
| US3639263A (en) * | 1968-07-31 | 1972-02-01 | Nalco Chemical Co | Corrosion inhibition with a tannin, cyanohydrinated lignosulfonate, and an inorganic metal salt composition |
| US3985659A (en) * | 1975-02-24 | 1976-10-12 | Georgia-Pacific Corporation | Drilling fluid composition |
| US4650593A (en) * | 1977-09-19 | 1987-03-17 | Nl Industries, Inc. | Water-based drilling fluids having enhanced fluid loss control |
| US4374738A (en) * | 1980-06-09 | 1983-02-22 | Georgia-Pacific Corporation | Drilling fluid composition |
| EP0072445A2 (en) * | 1981-07-27 | 1983-02-23 | B W Mud Limited | Temperature stable drilling fluids |
| US4502966A (en) * | 1983-09-09 | 1985-03-05 | Nalco Chemical Company | Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids |
| US4502965A (en) * | 1983-09-09 | 1985-03-05 | Nalco Chemical Company | Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids |
| US4502964A (en) * | 1983-09-09 | 1985-03-05 | Nalco Chemical Company | Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids |
| US4547299A (en) * | 1984-03-15 | 1985-10-15 | Milchem Incorporated | Drilling fluid containing a copolymer filtration control agent |
| US4676317A (en) * | 1986-05-13 | 1987-06-30 | Halliburton Company | Method of reducing fluid loss in cement compositions which may contain substantial salt concentrations |
Non-Patent Citations (2)
| Title |
|---|
| American Petroleum Institute, publication RP 13(B), 6th ed., Apr. 1976, pp. 1 33, Standard Procedure for Testing Drilling Fluids . * |
| American Petroleum Institute, publication RP 13(B), 6th ed., Apr. 1976, pp. 1-33, "Standard Procedure for Testing Drilling Fluids". |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5728653A (en) * | 1992-01-31 | 1998-03-17 | Institut Francais Du Petrole | Method for inhibiting reactive argillaceous formations and use thereof in a drilling fluid |
| CN114891489A (en) * | 2022-03-24 | 2022-08-12 | 长江大学 | Non-sulfonated high-temperature-resistant water-based drilling fluid |
| CN114891489B (en) * | 2022-03-24 | 2023-10-10 | 长江大学 | Non-sulfonated high-temperature-resistant water-based drilling fluid |
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