IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0293614
(2002-11-14)
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우선권정보 |
GB-0011584(2000-05-15) |
발명자
/ 주소 |
- Grainger,Neil
- Cox,Terence
- Scovell,Edward George
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출원인 / 주소 |
- Imperial Chemical Industries PLC
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
7 |
초록
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Drilling, completing or workover of a well, particularly an oil and/or gas well, is carried out using a fluid which includes a continuous phase including an ester of the formula (I): (R2) p-Ph-(CH2)m--COO-(AO)n-R1 where R1, AO, n, m, Ph, R2 and p have defined meanings and particularly where the este
Drilling, completing or workover of a well, particularly an oil and/or gas well, is carried out using a fluid which includes a continuous phase including an ester of the formula (I): (R2) p-Ph-(CH2)m--COO-(AO)n-R1 where R1, AO, n, m, Ph, R2 and p have defined meanings and particularly where the esters are alkyl or alkenyl benzoate esters. These esters are beneficial by having a range of viscosities, especially extending to low viscosities, and attractive toxicological and environmental profiles for use in drilling, completion and/or workover of wells.
대표청구항
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What is claimed is: 1. A method of drilling a well comprising: introducing into a well, during the drilling, a fluid comprising a continuous phase including at least one ester selected from iso-propyl benzoate, iso-stearyl benzoate, 2-ethylhexyl benzoate, iso-nonyl benzoate or oleyl benzoate. 2
What is claimed is: 1. A method of drilling a well comprising: introducing into a well, during the drilling, a fluid comprising a continuous phase including at least one ester selected from iso-propyl benzoate, iso-stearyl benzoate, 2-ethylhexyl benzoate, iso-nonyl benzoate or oleyl benzoate. 2. The method of claim 1 wherein said continuous phase further comprises at least one compound represented by the following formula (I): description="In-line Formulae" end="lead"(R2 )p-Ph-(CH2)m--COO-(AO)n-R1 (I) description="In-line Formulae" end="tail" wherein R1 is a C1 to C20 hydrocarbyl group; AO is an alkyleneoxy group and may vary along the (poly) alkyleneoxy chain; n 0 or from 1 to 100; m is 0, 1 or 2; and Ph is a phenyl group, which may be substituted with groups (R2)p; where each R2 is independently a C1 to C4 alkyl or alkoxy group; and p is 0, 1 or 2. 3. A method as claimed in claim 2 wherein R1 of formula (I) represents a C3 to C18 alkyl or alkenyl group. 4. A method as claimed in claim 2 wherein n, m and p of formula (I) each represent 0. 5. A method as claimed in claim 1, wherein the fluid includes at least 10% by weight of the total fluid of said ester. 6. A method as claimed in claim 2, wherein said continuous phase includes a blend of at least one compound of the formula (I) and at least one fatty acid ester. 7. A method as claimed in claim 1, wherein the well is an oil or gas well. 8. A method of drilling a well comprising: introducing into a well, during the drilling, a drilling fluid comprising an emulsion of an aqueous phase, including dissolved salts, in a continuous phase including at least one ester selected from iso-propyl benzoate, iso-stearyl benzoate, 2-ethylhexyl benzoate, iso-nonyl benzoate or oleyl benzoate; wherein said drilling fluid further includes a dispersion of weighting solids. 9. The method of claim 8 wherein said continuous phase further comprises at least one compound represented by the following formula (I): description="In-line Formulae" end="lead"(R2 )p-Ph-(CH2)m--COO-(AO)n-R1 (I) description="In-line Formulae" end="tail" wherein R1 represents a C1 to C20 hydrocarbyl group; AO independently represents an alkyleneoxy group; n is 0 or from 1 to 100; m is 0, 1 or 2; Ph represents a phenyl group; R2 independently represents a C1 to C4 alkyl or alkoxy group; and p is 0, 1 or 2; and wherein said drilling fluid further includes a dispersion of weighting solids. 10. The method of claim 9 wherein R1 of formula (I) represents a C3 to C18 alkyl or alkenyl group. 11. The method of claim 9 wherein n, m and p of formula (I) each represent 0. 12. The method of claim 8, wherein the fluid comprises at least 10% by weight relative to the total fluid of said ester. 13. The method of claim 9, wherein the continuous phase comprises a blend of at least one compound of the formula (I) and at least one fatty acid ester. 14. The method of claim 8, wherein the well is an oil and/or gas well. 15. The method of claim 8, wherein the well comprises oil and/or gas. 16. A drilling fluid for a well comprising: an emulsion of an aqueous phase in a continuous phase including at least one ester selected from iso-propyl benzoate, iso-stearyl benzoate, 2-ethylhexyl benzoate, iso-nonyl benzoate or oleyl benzoate. 17. The drilling fluid of claim 16 wherein said continuous phase further comprises at least one compound represented by the following formula (I): description="In-line Formulae" end="lead"(R2 )p-Ph-(CH2)m--COO-(AO)n-R1 (I) description="In-line Formulae" end="tail" wherein R1 represents a C1 to C20 hydrocarbyl group; AO independently represents an alkyleneoxy group; n 0 or from 1 to 100; m is 0, 1 or 2; Ph represents a phenyl group; R2 independently represents a C1 to C4 alkyl or alkoxy group; and p is 0, 1 or 2. 18. The drilling fluid of claim 17 wherein R1 of formula (I) represents a C3 to C18 alkyl or alkenyl group. 19. The drilling fluid of claim 17 wherein n, m and p of formula (I) each represent 0. 20. The drilling fluid of claim 16, wherein the continuous phase includes at least one compound selected from iso-propyl benzoate, iso-stearyl benzoate and/or oleyl benzoate. 21. The drilling fluid of claim 16, wherein the drilling fluid comprises at least 10% by weight relative to the total drilling fluid of said ester. 22. The drilling fluid of claim 17, wherein the continuous phase comprises a blend of at least one compound of the formula (I) and at least one fatty acid ester. 23. The drilling fluid of claim 16, wherein the well is an oil and/or gas well. 24. The drilling fluid of claim 16, wherein the well comprises oil and/or gas. 25. A drilling fluid for a well comprising an emulsion of an aqueous phase including dissolved salts in a continuous phase including at least one ester selected from iso-propyl benzoate, iso-stearyl benzoate, 2-ethylhexyl benzoate, iso-nonyl benzoate or oleyl benzoate; and a dispersion of weighting solids. 26. The drilling fluid of claim 25 wherein said continuous phase further comprises at least one compound represented by the following formula (I): description="In-line Formulae" end="lead"(R2 )p-Ph-(CH2)m--COO-(AO)n-R1 (I) description="In-line Formulae" end="tail" wherein R1 represents a C1 to C20 hydrocarbyl group; AO independently represents an alkyleneoxy group; n 0 or from 1 to 100; m is 0, 1 or 2; Ph represents a phenyl group; R2 independently represents a C1 to C4 alkyl or alkoxy group; p is 0, 1 or 2; and a dispersion of weighting solids. 27. The drilling fluid of claim 26 wherein R1 of formula (I) represents a C3 to C18 alkyl or alkenyl group. 28. The drilling fluid of claim 26 wherein n, m and p of formula (I) each represent 0. 29. The drilling fluid of claim 25, wherein the drilling fluid comprises at least 10% by weight of the total drilling fluid of said ester. 30. The drilling fluid of claim 26, wherein the continuous phase comprises a blend of at least one compound of the formula (I) and at least one fatty acid ester. 31. The drilling fluid of claim 25, wherein the well is an oil or gas well. 32. The drilling fluid of claim 25, wherein the well comprises oil and/or gas. 33. A method of drilling a well comprising: introducing into a well, during the drilling, a fluid comprising a continuous phase including at least one compound selected from iso-propyl benzoate, iso-stearyl benzoate or oleyl benzoate. 34. A method of drilling a well comprising: introducing into a well, during the drilling, a drilling fluid comprising an emulsion of an aqueous phase, including dissolved salts, in a continuous phase of an ester containing liquid comprising at least one compound selected from iso-propyl benzoate, iso-stearyl benzoate and/or oleyl benzoate, wherein said drilling fluid further includes a dispersion of weighting solids. 35. A drilling fluid comprising an emulsion of an aqueous phase including dissolved salts in a continuous phase of an ester containing liquid including at least one compound selected from iso-propyl benzoate, iso-stearyl benzoate and/or oleyl benzoate; and a dispersion of weighting solids.
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