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21. 发明授权

US5151196A Method for regenerating scale solvent 失效
标题翻译：再生规模溶剂的方法
公开(公告)号：US5151196A
公开(公告)日：1992-09-29
申请号：US766313
申请日：1991-09-27
申请人： James M. Paul , Richard L. Morris
发明人： James M. Paul , Richard L. Morris
IPC分类号： C02F5/12 , C09K8/528 , C23G1/36
CPC分类号： C23G1/36 , C02F5/12 , C09K8/528
摘要： Barium sulfate scale is dissolved by contacting the scale with an aqueous solvent having a pH of about 10 to about 14, preferably about 12, and comprising a chelating agent comprising a polyaminopolycarboxylic acid or salt of such an acid, and a synergist anion. The solvent containing the dissolved scale is regenerated by acidifying the spent solvent with an acidic chelating agent such as EDTA or DTPA, preferably DTPA, that release alkaline earth cations which react with sulfate ions present in the solvent to form a precipitate of an insoluble salt of the alkaline earth metal. The precipitate is then removed from the solvent by settling/decanting, filtering, or centrifuging. Thereafter, caustic is added to increase the pH of the solvent to a pH of about 10 to about 14, preferably about 12, to recover a regenerated solvent for reuse, in dissolving scale. The amount of chelating agent added to acidify the spent solvent balances the total amount of dilution caused by adding the caustic thereby maintaining the activity of the chelating agent in the regenerated solvent at least equivalent to or greater than the activity in the spent solvent.
摘要翻译：通过使水垢与约10至约14，优选约12的pH的水性溶剂接触并包含包含聚氨基多羧酸或这种酸的盐的螯合剂和增效剂阴离子来使溶解硫酸钡垢。含有溶解垢的溶剂通过用酸性螯合剂如EDTA或DTPA（优选DTPA）酸化废溶剂来再生，其释放与存在于溶剂中的硫酸根离子反应的碱土金属阳离子，以形成不溶性盐的沉淀物碱土金属。然后通过沉降/倾析，过滤或离心从溶剂中除去沉淀物。此后，加入苛性碱以将溶剂的pH增加至约10至约14，优选约12的pH，以回收再生溶剂以在溶解氧化垢中再次使用。用于酸化废溶剂的螯合剂的量平衡通过加入苛性碱引起的稀释总量，从而保持再生溶剂中螯合剂的活性至少等于或大于废溶剂中的活性。

22. 发明授权

US5093020A Method for removing an alkaline earth metal sulfate scale 失效
标题翻译：去除碱土金属硫酸盐垢的方法
公开(公告)号：US5093020A
公开(公告)日：1992-03-03
申请号：US332147
申请日：1989-04-03
申请人： James M. Paul , Richard L. Morris
发明人： James M. Paul , Richard L. Morris
IPC分类号： B09C1/02 , C02F5/08 , C02F5/10 , C02F5/12 , C09K8/528 , E21B43/28 , G21F9/00
CPC分类号： C09K8/528 , B09C1/02 , C02F5/08 , C02F5/10 , C02F5/12 , G21F9/002 , C02F2101/006 , Y10S507/927
摘要： A method and composition for removing barium and strontium sulfate scale deposits. The composition comprises an aqueous solution having a pH of about 8 to about 14, an EDTA or DTPA chelant, and a catalyst or synergist. Preferred chelants comprise diethylenetriaminepentaacetic acid (DTPA) or ethylenediaminetetraacetic acid (EDTA) or alkali salts thereof. Anions of organic and inorganic acids comprise the catalyst. Catalysts which can be used include Fluoride, oxalate, persulfate, dithionate, hypochlorite and formate anions also thio, amino, and hydroxy acetate anions. When the solution containing the composition is contacted with a surface containing a scale deposit, the deposit dissolves substantially more scale quicker than heretofore possible.
摘要翻译：一种去除钡和硫酸锶垢沉积物的方法和组合物。组合物包含pH为约8至约14的水溶液，EDTA或DTPA螯合剂，以及催化剂或增效剂。优选的螯合剂包括二亚乙基三胺五乙酸（DTPA）或乙二胺四乙酸（EDTA）或其碱式盐。有机酸和无机酸的阴离子包括催化剂。可以使用的催化剂包括氟化物，草酸盐，过硫酸盐，连二硫酸盐，次氯酸盐和甲酸根阴离子，也是硫代，氨基和羟基乙酸根阴离子。当含有组合物的溶液与含有矿物沉积物的表面接触时，沉积物比以前更可能更快地溶解更多的刻度。

23. 发明授权

US5085709A Method for treating natural gas equipment 失效
标题翻译：天然气设备处理方法
公开(公告)号：US5085709A
公开(公告)日：1992-02-04
申请号：US493180
申请日：1990-03-14
申请人： Richard L. Morris , James M. Paul
发明人： Richard L. Morris , James M. Paul
IPC分类号： B09C1/02 , C02F5/08 , C02F5/10 , C02F5/12 , C09K8/528 , E21B43/28 , G21F9/00
CPC分类号： E21B43/28 , B09C1/02 , C02F5/08 , C02F5/10 , C02F5/12 , C09K8/528 , G21F9/002
摘要： Natural gas processing equipment and sorption media such as charcoal, silica or alumina, contaminated with adherent scale deposits of alkaline earth metal sulfates may include radioactive components, especially radium sulfate and thorium sulfate, which render the equipment radioactive. The scale is removed from the processing equipment by washing with an aqueous chemical composition including a polyaminopolycarboxylic acid such as EDTA or DEPA as a chelant in combination with a synergist, preferably oxalate or monocarboxylate acid anion such as salicylate. The washing may be carried out with the equipment in place or by immersion of the equipment in a body of the solution in a suitable treatment tank.
摘要翻译：被碱土金属硫酸盐附着垢沉积物污染的天然气加工设备和木炭，二氧化硅或氧化铝等吸附介质可能包括放射性成分，特别是硫酸钍和硫酸钍，使设备具有放射性。通过用包含多氨基多羧酸如EDTA或DEPA作为螯合剂的水性化学组合物与增效剂，优选草酸盐或单羧酸盐阴离子如水杨酸盐组合洗涤，将规模从处理设备中除去。洗涤可以在设备就位或通过将设备浸入溶液体中的合适的处理槽中进行。

24. 发明授权

US4784838A Method of stabilizing solutions of chelated polyvalent metals 失效
标题翻译：稳定螯合多价金属溶液的方法
公开(公告)号：US4784838A
公开(公告)日：1988-11-15
申请号：US188054
申请日：1988-04-26
申请人： James M. Paul , Earl S. Snavely, Jr.
发明人： James M. Paul , Earl S. Snavely, Jr.
IPC分类号： B01D53/52 , C01B17/05 , C01B17/04
CPC分类号： B01D53/52 , C01B17/05
摘要： A cyclic process for removing H.sub.2 S from a gaseous stream comprising contacting the gaseous stream with a solution of a chelated polyvalent metal to produce elemental sulfur, removing the elemental sulfur, and regenerating the reaction solution, e.g., by contacting it with oxygen, and recycling the regenerated solution to the reaction zone, is modified by introducing into the solution a free chelating agent. The introduction of the free chelating agent eliminates the loss of the polyvalent metal and the chelated polyvalent metal from the reaction solution.There is also disclosed an aqueous reaction solution comprising a chelated polyvalent metal, sulfur, and a free chelating agent in the amount equal to at least about 0.1% by weight of the amount of the chelated polyvalent metal in the solution.
摘要翻译：一种用于从气流中除去H 2 S的循环方法，包括使气态物流与螯合多价金属的溶液接触以产生元素硫，除去元素硫并再生反应溶液，例如通过使其与氧接触，并将通过向游离溶液中引入游离螯合剂来修饰反应区的再生溶液。引入游离螯合剂可以消除反应溶液中多价金属和螯合多价金属的损失。还公开了包含螯合多价金属，硫和游离螯合剂的水溶液反应溶液，其量等于溶液中螯合多价金属的量的至少约0.1重量％。

25. 发明授权

US4775793A Method for determining chelated ferric ion concentration 失效
标题翻译：螯合铁离子浓度测定方法
公开(公告)号：US4775793A
公开(公告)日：1988-10-04
申请号：US838848
申请日：1986-03-12
申请人： James M. Paul
发明人： James M. Paul
IPC分类号： G01N21/33 , G01J3/36
CPC分类号： G01N21/33
摘要： A method of determining the concentration of a chelated ferric ion in a solution comprising measuring the ultraviolet (UV) light absorption of the solution at the wavelength of about 237 to about 241 nanometers (nm). The measured absorption is then correlated to a previously-determined value of the chelated ferric ion for the measured UV absorption value.
摘要翻译：测定溶液中螯合铁离子浓度的方法，包括测量溶液在约237至约241纳米（nm）波长处的紫外（UV）光吸收。然后将测量的吸收值与测定的UV吸收值的先前确定的螯合铁离子值相关。

26. 发明授权

US5415696A Method for removing alkaline sulfate scale in downhole tubulars 失效
标题翻译：在井下管中除去碱性硫酸盐垢的方法
公开(公告)号：US5415696A
公开(公告)日：1995-05-16
申请号：US254334
申请日：1994-06-06
申请人： James M. Paul
发明人： James M. Paul
IPC分类号： C09K8/528 , E21B37/00 , E21B37/02 , E21B37/06 , B08B1/04 , B08B3/08 , B08B9/00
CPC分类号： E21B37/00 , C09K8/528 , E21B37/02 , E21B37/06
摘要： The present invention relates to a method of removing alkaline earth sulfate scale from the interior surface of downhole production tubing comprising contacting the scale with a solvent having a specific gravity of at least 1.2 while simultaneously milling the scale with a rotating mill head connected to a downhole motor.
摘要翻译：本发明涉及一种从井下生产管道的内表面去除碱土硫酸盐垢的方法，包括使比例与比重至少为1.2的溶剂接触，同时用连接到井下的旋转磨头发动机。

27. 发明授权

US5282995A Composition for removing an alkaline earth metal sulfate scale 失效
标题翻译：去除碱土金属硫酸盐垢的组合物
公开(公告)号：US5282995A
公开(公告)日：1994-02-01
申请号：US766306
申请日：1991-09-27
申请人： James M. Paul , Richard L. Morris
发明人： James M. Paul , Richard L. Morris
IPC分类号： B09C1/02 , C02F5/08 , C02F5/10 , C02F5/12 , C09K8/528 , E21B43/28 , G21F9/00
CPC分类号： C09K8/528 , B09C1/02 , C02F5/08 , C02F5/10 , C02F5/12 , G21F9/002 , C02F2101/006 , Y10S507/927
摘要： A method and composition for removing barium and strontium sulfate scale deposits. The composition comprises an aqueous solution having a pH of about 8 to about 14, an EDTA or DTPA chelant, and a catalyst or synergist. Preferred chelants comprise diethylenetriaminepentaacetic acid (DTPA) or ethylenediaminetetraacetic acid (EDTA or alkali salts thereof. Anions of organic and inorganic acids comprise the catalyst. Catalysts which can be used include fluoride, oxalate, persulfate, dithionate, hypochlorite and formate anions. When the solution containing the composition is contacted with a surface containing a scale deposit, the deposit dissolves substantially more scale quicker than heretofore possible.
摘要翻译：一种去除钡和硫酸锶垢沉积物的方法和组合物。组合物包含pH为约8至约14的水溶液，EDTA或DTPA螯合剂，以及催化剂或增效剂。优选的螯合剂包括二亚乙基三胺五乙酸（DTPA）或乙二胺四乙酸（EDTA或其碱金属盐），有机和无机酸的阴离子包括催化剂，可使用的催化剂包括氟化物，草酸盐，过硫酸盐，连二硫酸盐，次氯酸盐和甲酸根阴离子含有组合物的容器与含有水垢沉积物的表面接触，沉积物比迄今为止可以更快地溶解更多的刻度。

28. 发明授权

US5259980A Compositions for dissolution of sulfate scales 失效
标题翻译：用于溶解硫酸盐垢的组合物
公开(公告)号：US5259980A
公开(公告)日：1993-11-09
申请号：US614489
申请日：1990-11-16
申请人： Richard L. Morris , James M. Paul
发明人： Richard L. Morris , James M. Paul
IPC分类号： B09C1/02 , C02F5/08 , C02F5/10 , C02F5/12 , C09K8/528 , E21B43/28 , G21F9/00
CPC分类号： G21F9/002 , B09C1/02 , C02F5/08 , C02F5/10 , C02F5/12 , C09K8/528 , C02F2101/006
摘要： Alkaline earth metal scales, especially barium sulfate scale deposits are removed from oilfield pipe and other tubular goods with a scale-removing composition comprising an aqueous alkaline solution having a pH of about 8 to about 14, a polyaminopolycarboxylic acid, preferably EDTA or DTPA and a catalyst or synergist comprising oxalate anion. When the scale-removing solution is contacted with a surface containing a scale deposit, substantially more scale is dissolved at a faster rate than previously possible.
摘要翻译：碱土金属垢，特别是硫酸钡垢沉积物从具有除垢组合物的油田管和其他管状物质中除去，该组合物包含pH为约8至约14的碱性水溶液，多氨基多羧酸，优选EDTA或DTPA和催化剂或增效剂包括草酸根阴离子。当除垢溶液与含有沉积物沉积物的表面接触时，以比之前可能的更快的速度溶解大量的氧化皮。

29. 发明授权

US5234602A Method for regenerating scale solvent 失效
标题翻译：用于再生规模溶液的方法
公开(公告)号：US5234602A
公开(公告)日：1993-08-10
申请号：US593136
申请日：1990-10-05
申请人： Richard L. Morris , James M. Paul
发明人： Richard L. Morris , James M. Paul
IPC分类号： C02F5/12 , C09K8/528
CPC分类号： C02F5/12 , C09K8/528
摘要： Barium sulfate scale is dissolved by contacting the scale with an aqueous solvent having a pH of about 10 to about 14, preferably about 12, and comprising a chelating agent comprising a polyaminopolycarboxylic acid or salt of such an acid, and a synergist anion. The solvent containing the dissolved scale is regenerated by acidifying the solvent in the presence of an anion which forms a precipitate of an insoluble salt of the alkaline earth metal of the dissolved scale. The precipitate is then removed from the solvent. Thereafter, the pH of the solvent is increased to a pH of about 10 to about 14, preferably about 12, to recover a regenerated solvent for reuse, in dissolving scale.
摘要翻译：通过使水垢与约10至约14，优选约12的pH的水性溶剂接触并包含包含聚氨基多羧酸或这种酸的盐的螯合剂和增效剂阴离子来使溶解硫酸钡垢。含有溶解氧化垢的溶剂通过在形成溶解氧化垢的碱土金属的不溶性盐的沉淀物的阴离子存在下酸化溶剂来再生。然后从溶剂中除去沉淀物。此后，将溶剂的pH值升高至约10至约14，优选约12的pH，以便在溶解氧化垢中回收再生溶剂以便再次使用。

30. 发明授权

US5146988A Method for scale removal in a wellbore 失效
标题翻译：在井筒中除垢的方法
公开(公告)号：US5146988A
公开(公告)日：1992-09-15
申请号：US745780
申请日：1991-08-16
申请人： James M. Paul
发明人： James M. Paul
IPC分类号： C09K8/528 , E21B37/06
CPC分类号： E21B37/06 , C09K8/528 , Y10S507/927
摘要： A method for removing calcium sulfate scale from a well comprising mixing carbon dioxide and water at a downhole location within the well to form an acidic solution containing an equilibrium mixture of carbonic acid, bicarbonate and carbonate ions that will convert the calcium sulfate scale to calcium carbonate scale and subsequent in situ dissolution of the calcium carbonate scale into the acidic solution that flows into the formation about the well.
摘要翻译：一种从井中除去硫酸钙垢的方法，包括在井内的井下位置混合二氧化碳和水，以形成含有碳酸，碳酸氢盐和碳酸根离子的平衡混合物的酸性溶液，其将硫酸钙垢转化为碳酸钙规模和随后的碳酸钙垢的原位溶解进入流入围绕井的地层的酸性溶液中。

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