5results about How to "Good viscosity reduction effect" patented technology

This invention relates to the field of oilfield chemical technology, and discloses a gemini surfactant, its preparation method, and its application. The gemini surfactant comprises the structure shown in Formula I, where R is a C1-C8 alkyl group or a C6-C8 aryl group; Y... ‑ SO3 ‑ M + The ions are alkali metal ions or alkaline earth metal ions; m = 1-30; n = 1-15. The gemini surfactant of this invention can be used as a viscosity reducer for heavy oil, exhibiting strong viscosity-reducing ability. Through the effective increase of the strength of the oil-water interface film via polyoxyethylene and polyoxypropylene segments, it has a good emulsifying effect, which is beneficial for the migration of oil-water emulsions in rock pores, expanding the swept area, significantly reducing residual oil saturation, and resulting in good oil displacement effect.

The invention belongs to the technical field of oil exploitation, and particularly relates to an oil-displacing agent for improving the recovery efficiency and a preparation method and application thereof. The preparation method comprises the following steps: adding 5-aminoisophthalic acid, first DMF (Dimethyl Formamide) and triethylamine into a reactor, cooling, slowly dropwise adding first malonyl chloride, and continuously reacting; dissolving benzidine disulfonic acid in second DMF, dropwise adding into the reactor, and continuously reacting; dropwise adding second malonyl chloride into the reactor, and continuously reacting; dissolving fatty amine in third DMF, dropwise adding into the reactor, and continuously reacting; and carrying out heating dissolution, cooling, solid precipitation, centrifugation and drying so as to obtain the product oil-displacing agent. The oil-displacing agent disclosed by the invention has the characteristics of high interfacial activity, good emulsifying effect and strong anti-shearing capability.

The invention discloses a slurry system suitable for complex rock stratum drilling and a preparation method and application thereof, the slurry system is composed of bentonite slurry and rock slag, and 23-41 g of rock slag is added into every 100 mL of bentonite slurry; the bentonite slurry is prepared from the following raw materials in parts by weight: 1 to 8 parts of bentonite, 0.03 to 0.32 part of sodium carbonate, 0.1 to 1 part of filtrate reducer, 0.1 to 0.5 part of coating inhibitor, 0.10 to 0.15 part of viscosity reducer and 100 parts of water. The raw material components are uniformly mixed and stirred, and an alkali solution is added to adjust the pH value to be neutral or alkalescent, so that the slurry system suitable for complex rock stratum drilling can be prepared. The slurry system can be used for preparing drilling fluid for complex rock stratum drilling in the Ordos region and the like. The problems that in the existing complex rock stratum drilling process, the rock slag amount is large, the inferior solid phase invasion concentration in mud is high, and the rheological property, the filter loss and the mud cake quality are difficult to control can be solved.

This application discloses an apparatus and method for reducing crude oil viscosity. The apparatus includes an amplitude transformer (202) with a high-energy acoustic beam transducer (201) connected to its top end, a tool head (204) with a scattering surface (2042) at its bottom end connected to its bottom end, a lifting lug (205) fitted at the center of a mounting disk (206), an exhaust port (2062) surrounding the center of the mounting disk (206), an amplitude transformer (202) fitted around the outer circumference of the exhaust port (2062), and a float ring (203) fitted around the circumferential edge of the mounting disk (206). This application is simple to operate and has high viscosity reduction efficiency.

The embodiment of the present application discloses a modified polyacrylate, a preparation method thereof, a glue solution, a glue and a UV adhesion-reducing scribing film, and a structural formula of the modified polyacrylate is as follows: wherein R1, R2 and R3 are independently any one of -H, an alkyl group, an aryl group, an ether group and a cyano group, R4 is an alkyl group, R5 is an organic group with an acrylate group and a carbon atom number of 2-26, R6, R7, R8, R9 and R10 are independently -H or a methyl group, X is O or N, and a, b, c, d and e are all integers greater than 0. 10 The embodiment of the present application introduces a high-reactivity photosensitive group (an acrylate group) into the polyacrylate, so that the light curing reaction efficiency of the polyacrylate is improved, the crosslinking density of the network structure formed by the UV curing of the polyacrylate is improved, and the adhesion-reducing effect of the generated UV adhesion-reducing scribing film is improved.