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1. 发明专利

CA2566304C WATER COMPATIBLE HYDRAULIC FLUIDS 未知
公开(公告)号：CA2566304C
公开(公告)日：2012-03-13
申请号：CA2566304
申请日：2005-05-25
申请人： SCHLUMBERGER CA LTD
发明人： ZAZOVSKY ALEXANDER , ZHOU JIAN , DEL CAMPO CHRISTOPHER , SALAMAT GOLCHEHREH , FU DIANKUI , LEE JESSE C
IPC分类号： C10M161/00
摘要： A composition for use in an oil chamber of a tool includes a hydraulic oil; and a surfactant, wherein the surfactant is present at an amount sufficient to form micelles in the hydraulic oil. The composition may further include an amphiphilic copolymer. A method includes providing a hydraulic fluid composition comprising a hydraulic oil and a surfactant capable of forming micelles in the hydraulic oil; and filling a hydraulic chamber in the tool with the hydraulic fluid composition. The hydraulic fluid composition may further include an amphiphilic copolymer.

2. 发明专利

CA2434357C AQUEOUS VISCOELASTIC FLUID 未知
公开(公告)号：CA2434357C
公开(公告)日：2011-06-21
申请号：CA2434357
申请日：2002-02-13
申请人： SCHLUMBERGER CA LTD
发明人： HUGHES TREVOR , JONES TIMOTHY GARETH JOHN , TUSTIN GARY JOHN , ZHOU JIAN
IPC分类号： C09K8/68 , C09K23/00 , C09K8/62 , C09K8/70 , C09K23/18 , E21B43/26
摘要： The invention concerns an aqueous viscoelastic fluid for use in the recovery of hydrocarbons. According to the invention, the aqueous viscoelastic fluid comprises a monomer, a dimer or an oligomer of a viscoelastic surfactant able to form a viscoelastic gel under downhole conditions, said surfactant comprising a hydrophobic tail and a hydrophilic head, and being of the following formulae: R-X-Y-Z where R is the hydrophobic tail of the surfactant, Z is the hydrophilic head of the surfactant, said hydrophilic head being charged, X is a stabilising group and Y chain is a linear, saturated or unsaturated, hydrocarbon chain of 1, 2 or 3 carbon atoms or a branched, saturated or unsaturated hydrocarbon chain wherein the main chain is of 1, 2 or 3 carbon atoms, possibly incorporating an aromatic ring.

3. 发明专利

CA2434613A1 VISCOELASTIC COMPOSITIONS 未知
公开(公告)号：CA2434613A1
公开(公告)日：2002-08-22
申请号：CA2434613
申请日：2002-02-13
申请人： SCHLUMBERGER CA LTD
发明人： HUGHES TREVOR , ZHOU JIAN
IPC分类号： C09K23/00 , C09K8/62 , C09K8/68 , C09K23/18 , C09K7/02 , B01F17/00 , E21B43/26
摘要： The present invention provides aqueous viscoelastic compositions comprising a cleavable surfactant and possibly also an electrolyte. The cleavable surfactants useful in the present invention comprise at least one weak chemical bond, which is capable of being broken under appropriate conditions , to produce oil soluble and water soluble products typically having no interfacial properties and surface activity compared with the original surfactant molecule. Further, the rheological properties of the aqueous viscolelastic composition are usually altered upon cleavage of the cleavable surfactant generally resulting in the elimination of the viscofying, viscoelastic and surfactant properties of the composition. Aqueous viscoelastic compositions in accordance with the present invention are suitable for use in oil-field applications, particularly for hydraulic fracturing of subterranean formations. Thus, the present invention also relates to a wellbore service fluid and a method of fracturing a subterranea n formation. The present invention also concerns novel cleavable surfactants.

4. 发明专利

CA2434345A1 AQUEOUS VISCOELASTIC FLUID 未知
公开(公告)号：CA2434345A1
公开(公告)日：2002-08-22
申请号：CA2434345
申请日：2002-02-13
申请人： SCHLUMBERGER CA LTD
发明人： ZHOU JIAN , HUGUES TREVOR
IPC分类号： C09K23/00 , C09K8/62 , C09K8/68 , C09K23/18 , C09K7/02 , B01F17/00 , E21B43/26
摘要： The invention concerns an aqueous viscoelastic fluid for use in the recovery of hydrocarbons. According to the invention this fluid comprises a first viscoelastic surfactant and a second surfactant able to decompose under downhole conditions to release a compound itself able to reduce the viscosit y of the aqueous viscoelastic fluid.

5. 发明专利

CA2547919C VISCOELASTIC SURFACTANT GELS WITH REDUCED SALT CONCENTRATION 未知
公开(公告)号：CA2547919C
公开(公告)日：2013-08-27
申请号：CA2547919
申请日：2004-10-11
申请人： SCHLUMBERGER CA LTD
发明人： HARTSHORNE ROBERT SETH , HUGHES TREVOR LLOYD , TUSTIN GARY JOHN , ZHOU JIAN , JONES TIMOTHY GARETH JOHN
IPC分类号： C09K8/70 , C09K8/516 , C09K8/68 , E21B43/25 , E21B43/26
摘要： A well bore treatment fluid of viscoelastic surfactants and methods for increasing the viscosity of the fluid at high temperature without increasing its salt concentration by adding a organic hydrophilic-lipophilic compound and reducing the salt concentration below 6 per cent.

6. 发明专利

CA2434357A1 AQUEOUS VISCOELASTIC FLUID 未知
公开(公告)号：CA2434357A1
公开(公告)日：2002-08-22
申请号：CA2434357
申请日：2002-02-13
申请人： SCHLUMBERGER CA LTD
发明人： ZHOU JIAN , TUSTIN GARY JOHN , JONES TIMOTHY GARETH JOHN , HUGHES TREVOR
IPC分类号： C09K23/00 , C09K8/62 , C09K8/68 , C09K23/18 , C09K7/02 , B01F17/00 , E21B43/26
摘要： The invention concerns an aqueous viscoelastic fluid for use in the recovery of hydrocarbons. According to the invention, the aqueous viscoelastic fluid comprises a monomer, a dimer or an oligomer of a viscoelastic surfactant abl e to form a viscoelastic gel under downhole conditions, said surfactant comprising a hydrophobic tail and a hydrophilic head, and being of the following formulae: R-X-Y-Z where R is the hydrophobic tail of the surfactan t, Z is the hydrophilic head of the surfactant, said hydrophilic head being charged, X is a stabilising group and Y chain is a linear, saturated or unsaturated, hydrocarbon chain of 1, 2 or 3 carbon atoms or a branched, saturated or unsaturated hydrocarbon chain wherein the main chain is of 1, 2 or 3 carbon atoms, possibly incorporating an aromatic ring.

7. 发明专利

AU7079801A Viscoelastic wellbore treatment fluid 未知
公开(公告)号：AU7079801A
公开(公告)日：2002-02-18
申请号：AU7079801
申请日：2001-07-11
申请人： SOFITECH NV , SCHLUMBERGER CA LTD , SCHLUMBERGER HOLDINGS , SCHLUMBERGER SERVICES PETROL , SCHLUMBERGER TECHNOLOGY BV
发明人： HUGHES TREVOR , JONES TIMOTHY GARETH JOHN , TUSTIN GARY JOHN , ZHOU JIAN
IPC分类号： C09K8/528 , C09K8/62 , C09K23/00 , B01F17/00 , E21B37/06 , E21B43/26
摘要： A treatment of a subterranean formation which contains a hydrocarbon-bearing zone, is carried out using a hydrocarbon-responsive fluid thickened with an oligomeric surfactant consisting of from 2 to 8_linked surfactant monomer subunits. The process of treatment comprises (i) mixing a thickening amount of oligomeric surfactant with an aqueous liquid to make a viscoelastic treatment fluid, (ii) pumping said viscoelastic treatment fluid through a wellbore and into the subterranean formation, where (iii) contact with hydrocarbons within the formation dissipates the viscosity of the treatment fluid.

8. 发明专利

CA2556250A1 HYDROGEL FOR USE IN DOWNHOLE SEAL APPLICATIONS 未知
公开(公告)号：CA2556250A1
公开(公告)日：2005-08-11
申请号：CA2556250
申请日：2005-01-28
申请人： SCHLUMBERGER CA LTD
发明人： ZHOU JIAN , LI YANMEI
IPC分类号： E21B33/12 , C08L1/28 , C08L5/14 , C09K3/10
摘要： The present invention is a composition for forming seals. The composition includes a base material and a hydrogel. The base materials is preferably an elastomer or a thermoplastic. Seals formed with the composition are particularly suited for use in a wellbore environment. The inclusion of hydrogel in the seals allows the seals to be manipulated or altered through certain environmental factors. For instance, temperature, oil/water ratio, pH and the electronic field may all be used to alter the characteristics of the hydrogel. In this way, the seal may be caused to swell in response to a specific stimulus, thereby preventing or sealing a leak without requiring additional work or input from the operator.

9. 发明专利

CA2437285A1 VISCOELASTIC WELLBORE TREATMENT FLUID 未知
公开(公告)号：CA2437285A1
公开(公告)日：2002-02-14
申请号：CA2437285
申请日：2001-07-11
申请人： SCHLUMBERGER CA LTD
发明人： JONES TIMOTHY GARETH JOHN , HUGHES TREVOR , TUSTIN GARY JOHN , ZHOU JIAN
IPC分类号： C09K8/528 , C09K8/62 , C09K23/00 , B01F17/00 , E21B37/06 , E21B43/26
摘要： A viscoelastic wellbore treatment fluid comprises an effective amount of an oligomeric surfactant for controlling the viscoelasticity of the fluid.

10. 发明专利

CA2434613C VISCOELASTIC COMPOSITIONS 未知
公开(公告)号：CA2434613C
公开(公告)日：2010-04-06
申请号：CA2434613
申请日：2002-02-13
申请人： SCHLUMBERGER CA LTD
发明人： ZHOU JIAN , HUGHES TREVOR
IPC分类号： C09K8/68 , C09K23/00 , C09K8/62 , C09K8/70 , C09K23/18 , E21B43/26
摘要： The present invention provides aqueous viscoelastic compositions comprising a cleavable surfactant and possibly also an electrolyte. The cleavable surfactants useful in the present invention comprise at least one weak chemical bond, which is capable of being broken under appropriate conditions, to produce oil soluble and water soluble products typically having no interfacial properties and surface activity compared with the original surfactant molecule. Further, the rheological properties of the aqueous viscolelastic composition are usually altered upon cleavage of the cleavable surfactant generally resulting in the elimination of the viscofying, viscoelastic and surfactant properties of the composition. Aqueous viscoelastic compositions in accordance with the present invention are suitable for use in oil-field applications, particularly for hydraulic fracturing of subterranean formations. Thus, the present invention also relates to a wellbore service fluid and a method of fracturing a subterranean formation. The present invention also concerns novel cleavable surfactants.

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