CA2093485A1 - Deep-drilling cement and process for the preparation thereof - Google Patents
Deep-drilling cement and process for the preparation thereofInfo
- Publication number
- CA2093485A1 CA2093485A1 CA 2093485 CA2093485A CA2093485A1 CA 2093485 A1 CA2093485 A1 CA 2093485A1 CA 2093485 CA2093485 CA 2093485 CA 2093485 A CA2093485 A CA 2093485A CA 2093485 A1 CA2093485 A1 CA 2093485A1
- Authority
- CA
- Canada
- Prior art keywords
- cement
- plastics powder
- deep
- plastics
- approximately
- 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.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
-
- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Earth Drilling (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Abstract The invention relates to a deep-drilling cement of a hydraulic binder and, if appropriate, additives and auxiliaries. In order to obtain high strengths with a low density of a slurry produced therefrom, plastics powder is admixed in an amount of approximately 50 to 800 kg/m3 of slurry, the plastics powder consisting of hard and tough or brittle, alkali-resistant particles with a grain size below approximately 2 mm which are unfilled or low-filled and drastically reduce their tensile strength at least only approximately 10°C above the particular maximum static borehole temperature.
Description
2093~8~
Deep-drilling cement and process for the preparation thereof The invention relates to a deep-drilling cement consisting of a hydraulic binder and, if appropriate, additives and auxiliaries and a process for the prepara-tion thereof.
During deep drilling, slurries of water and an agent which solidifies are pumped down through the casing tube into the borehole, rise up again between the bore-hole side and drilling rod and solidify there. The litre weight of the slurry is adjusted corresponding to the pressure and stability conditions encountered in the borehole. In general, the slurry must be the heavier the deeper it is used. Where, on account of the hydrostatic pressure, the rock might possibly break up or has already previously broken up so that slurry can penetrate, a slurry is required to be as light as possible. This is necessary, for example, for the cementation of the first casing tube strings for off-shore drilling. In the case of cementations of especially long casing tube strings (> 1 km)~ the stressing of the tubes by the internal pressure can become critical so that light slurries are thçrefore necessary.
Apar~ from such technical constraints, there are occasionally economic considerations according to which the lead slurries used are lightweight cement slurries.
Lightweight slurries for borehole cementation with a density of less than 1.7 kg/l, such as are used for formations with inadequate inherent stability, are produced by mixing bentonite, tras3, kie~elguhr, water glass or the like with cement and much water. These have the disadvantage that the 3trength development and non-poro~ity are low. It is also known (compare E.B. Nelson, WELL CEMENTING, Elsevier 1990, p. 3-14), in order to 2093~
avoid a high water/cement ratio, to add materials with low grain density, for example in the form of glas~ or ceramic hollow beads (microspheres). However, because of their high price, these have not prevailed and in addi-tion have the disadvantage that they can fragment underhigh physical stressing and then no longer contribute to reducing the litre weight of the slurry.
The object of the invention is to provide a deep-drilling cement and a process for the preparation thereof according to the generic clauses of Claims l and 10 which permit a low density slurry to be prepared with which a high compressive strength and non-porosity can be obtained.
This ob~ect is achieved in that plastics powder is admixed in an amount corresponding to approximately 50 to 800 kg of plastics powder per m3 of slurry, the plastics powder consisting of hard and tough or brittle, alkali-resistant particles with a grain size below approximately 2 mm which are unfilled or low-filled and ~0 drastically reduce their tensile strength at least about 10C above the particular maximum static borehole temperature.
Hard and tough and/or brittle amorphous thermo-plastics having a glass transition temperature at least approximately 10C above the particular maximum static borehole temperature, and partly crystalline thermo-plastic~ having a crystalline melting point at least approximately 10C above the particular maximum static borehole temperature and unfilled or low-filled thermo-sets having a decomposition temperature at least approxi-mately 10C above the particular maximum static borehole temperature can be used.
Therefore, only water-insoluble plastics are suitable which do not soften under the temperature conditions in the borehole or a~ least not to the extent that they adhere. In addition, unfilled or low-filled plastics having a raw density (approximately c 1.1 g/cm3) substantially corresponding to the specific weight of the .
Deep-drilling cement and process for the preparation thereof The invention relates to a deep-drilling cement consisting of a hydraulic binder and, if appropriate, additives and auxiliaries and a process for the prepara-tion thereof.
During deep drilling, slurries of water and an agent which solidifies are pumped down through the casing tube into the borehole, rise up again between the bore-hole side and drilling rod and solidify there. The litre weight of the slurry is adjusted corresponding to the pressure and stability conditions encountered in the borehole. In general, the slurry must be the heavier the deeper it is used. Where, on account of the hydrostatic pressure, the rock might possibly break up or has already previously broken up so that slurry can penetrate, a slurry is required to be as light as possible. This is necessary, for example, for the cementation of the first casing tube strings for off-shore drilling. In the case of cementations of especially long casing tube strings (> 1 km)~ the stressing of the tubes by the internal pressure can become critical so that light slurries are thçrefore necessary.
Apar~ from such technical constraints, there are occasionally economic considerations according to which the lead slurries used are lightweight cement slurries.
Lightweight slurries for borehole cementation with a density of less than 1.7 kg/l, such as are used for formations with inadequate inherent stability, are produced by mixing bentonite, tras3, kie~elguhr, water glass or the like with cement and much water. These have the disadvantage that the 3trength development and non-poro~ity are low. It is also known (compare E.B. Nelson, WELL CEMENTING, Elsevier 1990, p. 3-14), in order to 2093~
avoid a high water/cement ratio, to add materials with low grain density, for example in the form of glas~ or ceramic hollow beads (microspheres). However, because of their high price, these have not prevailed and in addi-tion have the disadvantage that they can fragment underhigh physical stressing and then no longer contribute to reducing the litre weight of the slurry.
The object of the invention is to provide a deep-drilling cement and a process for the preparation thereof according to the generic clauses of Claims l and 10 which permit a low density slurry to be prepared with which a high compressive strength and non-porosity can be obtained.
This ob~ect is achieved in that plastics powder is admixed in an amount corresponding to approximately 50 to 800 kg of plastics powder per m3 of slurry, the plastics powder consisting of hard and tough or brittle, alkali-resistant particles with a grain size below approximately 2 mm which are unfilled or low-filled and ~0 drastically reduce their tensile strength at least about 10C above the particular maximum static borehole temperature.
Hard and tough and/or brittle amorphous thermo-plastics having a glass transition temperature at least approximately 10C above the particular maximum static borehole temperature, and partly crystalline thermo-plastic~ having a crystalline melting point at least approximately 10C above the particular maximum static borehole temperature and unfilled or low-filled thermo-sets having a decomposition temperature at least approxi-mately 10C above the particular maximum static borehole temperature can be used.
Therefore, only water-insoluble plastics are suitable which do not soften under the temperature conditions in the borehole or a~ least not to the extent that they adhere. In addition, unfilled or low-filled plastics having a raw density (approximately c 1.1 g/cm3) substantially corresponding to the specific weight of the .
2~93~5 particular pure plastic are suitable in order to be able to keep the density of the crude slurry low. The use of at most low-filled plastics is possible because the slurries forming suspensions with high water content which are produced using these are being continuously agitated until they have arrived at the place of use and have such a viscosity that they are pumpable and the plastics particles do not float to the surface. In particular the slurries can be used in the seawater area and can be produced using seawater as mixing water.
By this means, slurries with a density less than 1.7 xg/l can be prepared, which on account of the hydrau-lic binding provides sufficient strength and at the same time are cost-effective, and in particular when the plastics powder comprises comminuted waste plastics and in particular plastics from domestic wastes whLch are not of pure grade and are usually low-filled. The latter are compo3ed, for example, principally of polypropylene, polyethylene, the two generally accounting for approximately 90~, and polystyrene. Polypropylene and polyethylene are partly crystalline thermoplastics with a glass transition temperature T5 ~ 0C whose service range is between T~ and the crystallite melting point T~.
In the case of slurries with a density in the region of 2S approximately 1.40 kg/l, it is possible in general to work with a water/solid ratio of ~ 0.5 and in the case of slurries with a density in the region of approximately 1.20 kg/l with a water/solids ratio of 2 0.35.
The plastics powder originating from wastes is expediently produced by comminuting molten and fused-together plastics wastes. For melting and fusing together, autoclaving of the plastics wastes in the form of compact, coherent, porous pack with a high water absorption capacity in a steam atmosphere at approxi-mately 160 to 220C is particularly suitable. Before melting, pre-comminuting may be expedient.
In particular, mixed-grain-plastics powder is used which preferably has a grain distribution in which 2~3~83 at least 90% of the particles are smaller than 1 mm. Since during comminution of the plastics practically no fines usually result, it may be expedient to introduce mineral dusts and/or flours, in particular quartz flour or fly ash, as additives in an amount of up to approximately 20% by weight of the plastics powder. In general the amount of the plastics powder is at least about 80% of the additives.
The slurry produced can contain approximately 200 to 1,200 kg/m3 of hydraulic binder and approximately 50 to 800 kg/m3 of plastics powder.
For the hydraulic binder, Portland cement, slag cement, high-alumina cement or similar cements, or cement substitutes such as, for example granulated blast furnace slag, if desired as a mixture of at least two of these cement types/cement substitutes, are suitable.
- Normally a proportion of fibre in the plastics powder is not desired because of the increased water requirements which this usually causes. These increased water requirements can be explained by a felting effected by the fibres resulting in interstices retaining excess water. Surprisingly, despite the high water/cement ratios resulting from this (see following Examples l and 2), sufficient strengths are attained for the field of application. Nevertheless, the proportion of fibre in the plastics powder, in order to produce slurry litre weights of less than or equal to 1.3 kg/l, should be as far as possible less than lQ% by weight, in particular < 5% by weight.
For particular applications, however, it may be advantageous to have larger proportional amounts of fibres, in 2093~5 - 4a -particular up to 25~ by weight, in the plastics powder, for example for slurries for sealing such rents and lines of stratification which effect losses during the cementation of the annular space.
To reduce the water requirements of the hydraulic binder, a thinning agent can be added. The addition of an agent for increasing the wettability of the plastics powder by water, for example in the form of surfactants 2~93~a with hydrophilic and hydrophobic groups, is also advan-tageous in order to obtain a suspension which is as homogeneous as possible and thus water requirements which are as uniform as possible.
Further additiveq such as setting-regulating agents, agents for reducing the gas permeability (~uch as latex suspensions), agents for regulating the water retention capacity etc. can be added.
The plastics powderjcan form a dry mixture with the hydraulic binder and any additives and auxiliaries;
however, it can also be admixed during the preparation of the ~lurry.
Exam~le 1 A light slurry for obtaining a high early strength on the North Sea floor is prepared in an amount of 1 m3 and with a density of 1.6 kg/l from:
800 kg of Portland cement PZ 55 according to 440 kg of seawater 214 kg of plastics powder (45% of polypropylene, 45%
of polyethylene, 10% of polystyrene, grain distribution < 2 mm with 90% ~ 1 mm, water requirements 150%) 3 kg of thinning agent 0.3 kg of foaming inhibitor At 10C an early ~trength of approximately 2 MPa results after 12 h and eventually a final strength of approxi-mately 25 NPa.
(The water requirements were determined here by weighing out 10.0 g of substance to an accuracy of 0.1 g and transferring it quantitatively into a wet folded filter. 100 ml of desalinated water are poured over the sample. The excess water run~ off through the filter and i~ caught in a 100 ml measuring cylinder. In the case of inert substances, the measurement is completed when, after the filtrate has been allowed to pass through several times, there is no change in the amount of filtrate which has run through. The difference between 2093~
100 ml and the volume of filtrate read off i~ multiplied by 10 and provides the water requirements in per cent.) Examnle 2 A light slurry is prepared in an amount of 1 m3 with a density of 1.3 kg/l from:
500 kg of cement API 10 Class G
313 kg of plastics powder according to Example ?
500 kg of fresh water 1.3 kg of thinning agent 0.25 kg of foaming inhibitor This results in a strength of approximately 7 NPa in thé
temperature range of up to lOO-C.
In the accompanying diagram the uniaxial com-pressive strength in NPa is plotted on the ordinate and the density of the slurry on the abscissa. The diagram includes curves regarding the final strengths at tempera-tures below 100C, curve A relating to slurries reduced in density by the addition of 25~ trass, curve B to slurries reduced in density by the addition of glass hollow beads and curve C to slurries according to the invention reduced in density by the addition of plastics powder. The increase in strength in the density range investigated with re~pect to known deep-drilling cements is clearly recognisable.
By this means, slurries with a density less than 1.7 xg/l can be prepared, which on account of the hydrau-lic binding provides sufficient strength and at the same time are cost-effective, and in particular when the plastics powder comprises comminuted waste plastics and in particular plastics from domestic wastes whLch are not of pure grade and are usually low-filled. The latter are compo3ed, for example, principally of polypropylene, polyethylene, the two generally accounting for approximately 90~, and polystyrene. Polypropylene and polyethylene are partly crystalline thermoplastics with a glass transition temperature T5 ~ 0C whose service range is between T~ and the crystallite melting point T~.
In the case of slurries with a density in the region of 2S approximately 1.40 kg/l, it is possible in general to work with a water/solid ratio of ~ 0.5 and in the case of slurries with a density in the region of approximately 1.20 kg/l with a water/solids ratio of 2 0.35.
The plastics powder originating from wastes is expediently produced by comminuting molten and fused-together plastics wastes. For melting and fusing together, autoclaving of the plastics wastes in the form of compact, coherent, porous pack with a high water absorption capacity in a steam atmosphere at approxi-mately 160 to 220C is particularly suitable. Before melting, pre-comminuting may be expedient.
In particular, mixed-grain-plastics powder is used which preferably has a grain distribution in which 2~3~83 at least 90% of the particles are smaller than 1 mm. Since during comminution of the plastics practically no fines usually result, it may be expedient to introduce mineral dusts and/or flours, in particular quartz flour or fly ash, as additives in an amount of up to approximately 20% by weight of the plastics powder. In general the amount of the plastics powder is at least about 80% of the additives.
The slurry produced can contain approximately 200 to 1,200 kg/m3 of hydraulic binder and approximately 50 to 800 kg/m3 of plastics powder.
For the hydraulic binder, Portland cement, slag cement, high-alumina cement or similar cements, or cement substitutes such as, for example granulated blast furnace slag, if desired as a mixture of at least two of these cement types/cement substitutes, are suitable.
- Normally a proportion of fibre in the plastics powder is not desired because of the increased water requirements which this usually causes. These increased water requirements can be explained by a felting effected by the fibres resulting in interstices retaining excess water. Surprisingly, despite the high water/cement ratios resulting from this (see following Examples l and 2), sufficient strengths are attained for the field of application. Nevertheless, the proportion of fibre in the plastics powder, in order to produce slurry litre weights of less than or equal to 1.3 kg/l, should be as far as possible less than lQ% by weight, in particular < 5% by weight.
For particular applications, however, it may be advantageous to have larger proportional amounts of fibres, in 2093~5 - 4a -particular up to 25~ by weight, in the plastics powder, for example for slurries for sealing such rents and lines of stratification which effect losses during the cementation of the annular space.
To reduce the water requirements of the hydraulic binder, a thinning agent can be added. The addition of an agent for increasing the wettability of the plastics powder by water, for example in the form of surfactants 2~93~a with hydrophilic and hydrophobic groups, is also advan-tageous in order to obtain a suspension which is as homogeneous as possible and thus water requirements which are as uniform as possible.
Further additiveq such as setting-regulating agents, agents for reducing the gas permeability (~uch as latex suspensions), agents for regulating the water retention capacity etc. can be added.
The plastics powderjcan form a dry mixture with the hydraulic binder and any additives and auxiliaries;
however, it can also be admixed during the preparation of the ~lurry.
Exam~le 1 A light slurry for obtaining a high early strength on the North Sea floor is prepared in an amount of 1 m3 and with a density of 1.6 kg/l from:
800 kg of Portland cement PZ 55 according to 440 kg of seawater 214 kg of plastics powder (45% of polypropylene, 45%
of polyethylene, 10% of polystyrene, grain distribution < 2 mm with 90% ~ 1 mm, water requirements 150%) 3 kg of thinning agent 0.3 kg of foaming inhibitor At 10C an early ~trength of approximately 2 MPa results after 12 h and eventually a final strength of approxi-mately 25 NPa.
(The water requirements were determined here by weighing out 10.0 g of substance to an accuracy of 0.1 g and transferring it quantitatively into a wet folded filter. 100 ml of desalinated water are poured over the sample. The excess water run~ off through the filter and i~ caught in a 100 ml measuring cylinder. In the case of inert substances, the measurement is completed when, after the filtrate has been allowed to pass through several times, there is no change in the amount of filtrate which has run through. The difference between 2093~
100 ml and the volume of filtrate read off i~ multiplied by 10 and provides the water requirements in per cent.) Examnle 2 A light slurry is prepared in an amount of 1 m3 with a density of 1.3 kg/l from:
500 kg of cement API 10 Class G
313 kg of plastics powder according to Example ?
500 kg of fresh water 1.3 kg of thinning agent 0.25 kg of foaming inhibitor This results in a strength of approximately 7 NPa in thé
temperature range of up to lOO-C.
In the accompanying diagram the uniaxial com-pressive strength in NPa is plotted on the ordinate and the density of the slurry on the abscissa. The diagram includes curves regarding the final strengths at tempera-tures below 100C, curve A relating to slurries reduced in density by the addition of 25~ trass, curve B to slurries reduced in density by the addition of glass hollow beads and curve C to slurries according to the invention reduced in density by the addition of plastics powder. The increase in strength in the density range investigated with re~pect to known deep-drilling cements is clearly recognisable.
Claims (22)
1. Deep-drilling cement consisting of a hydraulic binder and, if appropriate, additives and auxiliaries characterised in that plastics powder is admixed in an amount corresponding to approximately 50 to 800 kg of plastics powder per m3 of slurry, the plastics powder consisting of hard and tough or brittle, alkali-resistant particles with a grain size below approximately 2 mm which are unfilled or low-filled and drastically reduce their tensile strength at least only approximately 10°C
above the particular maximum static borehole temperature,
above the particular maximum static borehole temperature,
2. Deep-drilling cement according to Claim 1, characterised in that the plastic powder comprises mixed grains.
3. Deep-drilling cement according to Claim 1 or 2, characterised in that the plastics powder has a grain distribution containing predominantly preferably at least 90% of particles smaller than 1 mm.
4. Deep-drilling cement according to one of Claims 1 to 3, characterised in that the plastics powder con-sists of comminuted waste plastics.
5. Deep-drilling cement according to Claim 4, characterised in that the plastics powder consists of plastic from domestic wastes of non-pure grade.
6. Deep-drilling cement according to one of Claims 1 to 5, characterised in that mineral dusts and/or flours are contained in an amount of up to approximately 20% by weight of the plastics powder as auxiliaries.
7. Deep-drilling cement according to one of Claims 1 to 6, characterised in that it contains as hydraulic binder Portland cement, slag cement or high-alumina cement, if appropriate as a mixture of at least two cement types.
8. Deep-drilling cement according to one of Claims 1 to 7, characterised in that a fibre proportion of the plastics powder of less than 10, in particular less than 5, % by weight of the proportion of plastic is present.
9. Deep-drilling cement according to one of Claims 1 to 7, characterised in that a proportion of fibre of less than 25% by weight is present in the plastics powder.
10. Method for preparing a deep-drilling cement slurry from water, a hydraulic binder and, if appro-priate, additives and auxiliaries, characterised in that a slurry with a density of below 1.7 kg/l is produced which contains plastics powder in an amount corresponding to approximately 50 to 800 kg of plastics powder per m3 of slurry, the plastics powder consisting of hard and tough or brittle, alkali-resistant particles with a grain size below approximately 2 mm, which are unfilled or low-filled and drastically reduce their tensile strength at least only approximately 10°C above the particular maximum static borehole temperature.
11. Method according to Claim 10, characterised in that a thinning agent is added.
12. Method according to Claim 10 or 11, characterised in that an agent for increasing the wettability of the plastics powder by water is added.
13. Method according to one of Claims 10 to 12, characterised in that a plastics powder with mixed grains is used.
14. Method according to one of Claims 10 to 11, characterised in that plastics powder with a grain distribution in which at least 90% of the particles are smaller than 1 mm is used.
15. Method according to one of Claims 10 to 14, characterised in that plastics powder produced from comminuted waste plastics is used.
16. Method according to Claim 15, characterised in that plastics powder produced from plastics from domestic wastes of non-pure grade is used.
17. Procedure according to one of Claims 10 to 16, characterised in that mineral dusts and/or flours are added in an amount up to approximately 20% by weight of the plastics powder as auxiliaries.
18. Method according to one of claims 10 to 17, characterised in that, as hydraulic binder, Portland cement, slag cement or high-alumina cement, if appropriate as a mixture of at least two cement types, is used.
19. Method according to one of claims 10 to 18, characterised in that plastics powder with a fibre proportion of below 10, in particular below 5, % by weight of the proportion of plastic is used.
20. Method according to one of claims 10 to 18, characterised in that plastics powder with a fibre proportion of less than 25% by weight of the proportion of plastic is used.
21. Deep-drilling cement according to one of claims 1 to 9, characterised in that, as hydraulic binder, a cement substitute, in particular granulated blast furnace slag, if desired as a mixture with another cement type, is present.
22. Method according to one of claims 10 to 20, characterised in that, as hydraulic binder, a cement substitute, in particular granulated blast furnace slag, if desired as a mixture with another cement type, is present.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4212437 | 1992-04-14 | ||
| DEP4212437.9 | 1992-04-14 | ||
| DE4302737 | 1993-02-01 | ||
| DEP4302737.7 | 1993-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2093485A1 true CA2093485A1 (en) | 1993-10-15 |
Family
ID=25913957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2093485 Abandoned CA2093485A1 (en) | 1992-04-14 | 1993-04-06 | Deep-drilling cement and process for the preparation thereof |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0566012A1 (en) |
| JP (1) | JPH06183798A (en) |
| CA (1) | CA2093485A1 (en) |
| HU (1) | HUT67639A (en) |
| NO (1) | NO931355L (en) |
| OA (1) | OA09875A (en) |
| TN (1) | TNSN93039A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074045A (en) * | 2012-12-16 | 2013-05-01 | 西南石油大学 | Anti-gas channeling toughening cement slurry for well cementation of small-gap annular horizontal well |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2784095B1 (en) * | 1998-10-06 | 2001-09-21 | Dowell Schlumberger Services | CEMENTING COMPOSITIONS AND APPLICATION THEREOF FOR CEMENTING OIL WELLS OR THE LIKE |
| FR2787441B1 (en) * | 1998-12-21 | 2001-01-12 | Dowell Schlumberger Services | CEMENTING COMPOSITIONS AND APPLICATION THEREOF FOR CEMENTING OIL WELLS OR THE LIKE |
| NO345748B1 (en) * | 2005-12-29 | 2021-07-12 | Halliburton Energy Services Inc | Cement composition comprising particulate, carboxylated elastomer and process using the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1239255B (en) * | 1966-06-04 | 1967-04-27 | Halliburton Co | Deep drilling cement mixture with improved perforation properties |
| EP0242334A1 (en) * | 1986-04-16 | 1987-10-21 | Eduard Winner | Process for the production of concrete and concrete-like materials as well as roofing and façade members |
| DE3815703A1 (en) * | 1988-05-07 | 1989-11-16 | Huels Chemische Werke Ag | Rubber-containing concrete mixtures, the production thereof and use thereof for producing liquid-impermeable concrete constructions |
-
1993
- 1993-04-06 CA CA 2093485 patent/CA2093485A1/en not_active Abandoned
- 1993-04-07 EP EP19930105735 patent/EP0566012A1/en not_active Ceased
- 1993-04-07 HU HU9301019A patent/HUT67639A/en unknown
- 1993-04-13 NO NO93931355A patent/NO931355L/en unknown
- 1993-04-14 JP JP11227093A patent/JPH06183798A/en active Pending
- 1993-04-14 OA OA60364D patent/OA09875A/en unknown
- 1993-04-14 TN TNSN93039 patent/TNSN93039A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074045A (en) * | 2012-12-16 | 2013-05-01 | 西南石油大学 | Anti-gas channeling toughening cement slurry for well cementation of small-gap annular horizontal well |
| CN103074045B (en) * | 2012-12-16 | 2015-04-22 | 西南石油大学 | Anti-gas channeling toughening cement slurry for well cementation of small-gap annular horizontal well |
Also Published As
| Publication number | Publication date |
|---|---|
| TNSN93039A1 (en) | 1994-03-17 |
| JPH06183798A (en) | 1994-07-05 |
| EP0566012A1 (en) | 1993-10-20 |
| NO931355D0 (en) | 1993-04-13 |
| HUT67639A (en) | 1995-04-28 |
| HU9301019D0 (en) | 1993-11-29 |
| NO931355L (en) | 1993-10-15 |
| OA09875A (en) | 1994-09-15 |
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