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公开(公告)号：US10233385B2
公开(公告)日：2019-03-19
申请号：US14753942
申请日：2015-06-29
Applicant: BAKER HUGHES INCORPORATED
Inventor： Leiming Li , Magnus Legemah , Jia Zhou , Xiaolan Wang , Ahmed Gomaa , Hong Sun
Abstract: A well servicing fluid includes ingredients including a GLDA salt, a crosslinker, and a viscosifying agent that is not crosslinked by the crosslinker. A well treatment method includes forming a well servicing fluid with ingredients including a GLDA salt, a viscosifying agent, and a crosslinker, the GLDA salt containing a metal cation chelated with a GLDA anion. The well servicing fluid is inserted into a well in a formation. The method includes crosslinking the viscosifying agent and attaining a first viscosity of the well servicing fluid using the crosslinker. After the attaining of the first viscosity, viscosity of the well servicing fluid in the well is decreased to a second viscosity less than the first viscosity by using the GLDA anion. The GLDA salt may be a GLDA calcium salt and the crosslinker may be a zirconium crosslinker.
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公开(公告)号：US20160376881A1
公开(公告)日：2016-12-29
申请号：US14753942
申请日：2015-06-29
Applicant: BAKER HUGHES INCORPORATED
Inventor： Leiming Li , Magnus Legemah , Jia Zhou , Xiaolan Wang , Ahmed Gomaa , Hong Sun
Abstract: A well servicing fluid includes ingredients including a GLDA salt, a crosslinker, and a viscosifying agent that is not crosslinked by the crosslinker. A well treatment method includes forming a well servicing fluid with ingredients including a GLDA salt, a viscosifying agent, and a crosslinker, the GLDA salt containing a metal cation chelated with a GLDA anion. The well servicing fluid is inserted into a well in a formation. The method includes crosslinking the viscosifying agent and attaining a first viscosity of the well servicing fluid using the crosslinker. After the attaining of the first viscosity, viscosity of the well servicing fluid in the well is decreased to a second viscosity less than the first viscosity by using the GLDA anion. The GLDA salt may be a GLDA calcium salt and the crosslinker may be a zirconium crosslinker.
Abstract translation: 维护良好的流体包括成分，包括GLDA盐，交联剂和不由交联剂交联的增粘剂。 井处理方法包括用包含GLDA盐，增粘剂和交联剂的成分形成维护良好的流体，所述GLDA盐含有与GLDA阴离子螯合的金属阳离子。 将维护良好的液体插入地层中的井中。 该方法包括使用交联剂交联增粘剂并获得维修液的第一粘度。 在达到第一粘度之后，通过使用GLDA阴离子，井中维修液的粘度降低到小于第一粘度的第二粘度。 GLDA盐可以是GLDA钙盐，交联剂可以是锆交联剂。
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公开(公告)号：US20170152434A1
公开(公告)日：2017-06-01
申请号：US15365372
申请日：2016-11-30
Applicant: BAKER HUGHES INCORPORATED
Inventor： Jennifer L. Cutler , Ahmed Gomaa , Xiaolan Wang , Marty J. Usie , Harold G. Hudson
Abstract: A composition of a mixture of at least three organic acids with hydrofluoric acid (HF) generates a system that stimulates subterranean sandstone formations, enhances the permeability thereof, and therefore increases the formation's productivity. This system has a very low corrosion rate and may start with a pH greater than about 2. It is suitable for high temperature wells (greater than about 250° F. (121° C.)) and wells completed with specialized metal alloys. The system is hydrochloric acid-free and is compatible with high clay formations. Particularly suitable organic acids include, but are not necessarily limited to, the dicarboxylic acids succinic acid, glutaric acid, adipic acid, and mixtures thereof. Alternatively, the hydrofluoric acid is supplied by a substance that hydrolyzes to HF (e.g. ammonium bifluoride) and boric acid is included to delay the hydrolyzing to HF.
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