Hardener for mud cakes of drilling fluid
A hardening agent and drilling fluid technology, applied in the field of drilling fluid additives, can solve the problems of large component content, changing drilling fluid performance and affecting construction requirements, etc., and achieve the effect of meeting construction requirements
Inactive Publication Date: 2012-11-07
BC P INC CHINA NAT PETROLEUM CORP +1
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AI Technical Summary
Problems solved by technology
[0003] The present invention is to overcome the problems in the background technology that the content of the activator component is added and the activator changes the performance of the drilling fluid and affects the construction requirements, and provides a Drilling fluid mud cake hardener
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0015] Weigh 90 g of 10-100 micron hydrated silica, 5 g of dispersant, 2 g of retarder, and 3 g of flow pattern improver to prepare a mud cake hardener for drilling fluid.
Embodiment 2
[0017] Weigh 50 g of 10-100 micron hydrated silica, 30 g of dispersant, 15 g of retarder, and 5 g of flow pattern improver to prepare a mud cake hardener for drilling fluid.
Embodiment 3
[0019] Weigh 40 g of 10-100 micron hydrated silica, 25 g of dispersant, 20 g of retarder, and 5 g of flow pattern improver to prepare a mud cake hardener for drilling fluid.
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The invention relates to a hardener for mud cakes of drilling fluid. The invention solves the existing problems in prior arts including high contents of activator components and changes of drilling fluid properties caused by the activators, which can influence construction requirements. The hardener is characterized in that the hardener comprises the following components in percentage by weight: 50-90% of micron-sized silicon dioxide hydrate, 5-30% of dispersing agent, 2-20% of retarding agent and 1-5% of flow pattern modifier. The hardener for mud cakes of drilling fluid has the characteristics of less dosage and no influence to the drilling fluid properties, takes effects only in the interface of water and mud, and can meet the construction requirements.
Description
Technical field [0001] The invention involves a drilling liquid additive used in the field of petroleum drilling engineering, especially a drilling liquid clay cake sclerosis. Background technique [0002] In order to improve the quality of the oil drilling engineering, the clay cake is required to harden the mud cake itself.Due to the incompatibility of the two substances of clay cake and solid well cement, in order to ensure the sealing quality of the second interface of the well, the rotary generator is used to scrape the clay cake.Cake, therefore, the solid quality of the well -known well interface has not been fundamentally solved.Regarding the mud cake sclerosis method, there are reports that add blast furnace slag and then add activation agent solidification, but these slag must be effective at the content of a large activation agent component. At the same timeCan't meet the requirements of construction. Invention content [0003] The present invention is to overcome the ...
Claims
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Inventor 何俊才刘铁卜闫玉良郭金玉肖志兴
Owner BC P INC CHINA NAT PETROLEUM CORP
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