4results about How to "Control liquidity" patented technology

This invention relates to the field of oilfield chemistry, and discloses a fracturing fluid drag-reducing agent composition, its preparation method, and its application. The drag-reducing agent composition comprises cis-15-tetracosenoic acid and a polymer; the polymer comprises polymer A and polymer B, polymer A comprising structural unit A from formula (1), and polymer B comprising structural unit B from formula (2); formula (1); formula (2); wherein R1 is substituted or unsubstituted C 12 -C 20 R1 is an alkyl group; R2 is an unsubstituted C1-C4 alkyl group; X is selected from positive integers from 6 to 14; R3 is H or a C1-C3 alkyl group. The drag-reducing agent composition can maintain drag-reducing performance and improve oil recovery over a wide temperature range.

The application discloses a kind of preparation method for preparing sheet low-sodium alpha-alumina using secondary aluminum ash.The method uses high-temperature sintering method to prepare alumina, and the performance of the product is improved by pickling or water washing.The obtained sheet low-sodium alpha-alumina has the advantages of perfect crystal form development, high purity, low sodium content, high alpha-alumina content, and micro-nano level particle size.The application does not add any morphology inducer, and eliminates the pollution problem caused by ammonia gas generated due to incomplete denitrification of aluminum ash, realizes the removal of harmful elements in aluminum ash, and achieves the purposes of harmless treatment and resource utilization.Also, the application overcomes the shortcomings of high cost, low efficiency, low purity and serious pollution in the prior art for preparing sheet alumina.The prepared sheet low-sodium alpha-alumina has great application potential in high-end automobile polishing, gem processing, high-precision microelectronic processing, cosmetics, functional coating and ceramic toughening, etc.

This invention relates to the field of testing methods, specifically to a tensile testing method for the bonding strength of brazed diamond composite coatings. The method involves preparing tensile specimens of the brazed diamond composite coating, sequentially performing tensile tests on each group of specimens using a tensile testing machine, recording the fracture location data and the maximum tensile load at fracture for each group of specimens, and making judgments based on the recorded data. This method solves the technical problem of quantitatively evaluating high-hardness, high-bonding-strength coatings, and provides an effective solution for evaluating the bonding performance of high-performance coatings such as diamond composite coatings.

This utility model relates to the field of drilling gates, and more particularly to a combined drilling gate, including a gate installation channel. A support platform is fixedly installed at the lower end of the gate installation channel, and a fixed platform is fixedly installed at the upper end of the gate installation channel. Fixed brackets are fixedly installed on both sides of the support platform and the fixed platform. A liftable gate body is installed on the fixed platform and the gate installation channel. A motor box is fixedly installed at the upper end of the gate body. A drive motor is installed inside the motor box. A gate arm is fixedly connected to the output end of the drive motor. A rotating plate is fixedly connected to the lower end of the gate arm. This utility model, by setting up the gate body, drive motor, gate arm, and rotating plate, allows the opening and closing of the entire gate installation channel to be controlled by moving the gate body up and down, thereby controlling the overall height of the gate body and the rotating plate, and further controlling the flow rate of the drilling fluid. After the drive motor starts, it drives the gate arm to rotate, thereby driving the rotating plate to rotate, controlling the flow and flow rate of the drilling fluid, achieving dual control.