3results about How to "Improve lubricating properties" patented technology

This invention discloses a high-conductivity emulsion-type intelligent fracturing fluid for oil and gas field enhancement and its preparation method. This fracturing fluid aims to solve the technical problem of the contradiction between the proppant-carrying capacity and the post-colloidal conductivity of traditional fracturing fluids in deep wells under high temperature and high salinity environments. Its core lies in the introduction of a temperature- and salt-responsive zirconium-silicon hybrid nano-crosslinking agent and biomimetic surface-modified layered silicate nanosheets. In preparation, a water-in-oil base emulsion is first formed, followed by the sequential addition of the two modified compounds. The nano-crosslinking agent is prepared through silanization and polymer grafting processes, enabling intelligent activation and viscosity enhancement under formation conditions. The nanosheets are prepared through montmorillonite exfoliation and biomimetic dopamine coating modification, combining drag reduction and proppant surface modification functions. This fracturing fluid system achieves intelligent response with low friction during pumping, high proppant-carrying capacity in the formation, and the formation of high-conductivity channels after colloidal breakdown, making it particularly suitable for fracturing and stimulation of deep and unconventional reservoirs.

The invention is suitable for the technical field of superhard film production, and provides a method for improving the tribological performance of a diamond-like carbon film, and the method comprises the following steps: S1, pretreating a substrate material, and removing surface pollutants; s2, depositing a Cr / WC composite transition layer on the surface of the substrate by using an unbalanced magnetron sputtering technology; s3, depositing a DLC film on the Cr / WC composite transition layer by using a high-energy ion source; and S4, performing high-energy hydrogen ion implantation on the surface of the prepared DLC film to form a hydrogen-rich modified layer. Therefore, the friction coefficient of the diamond-like carbon film can be obviously reduced, and the reduction amplitude exceeds 50%; and the running-in period is shortened from 5000 cycles to less than 2000 cycles, so that the running-in period is greatly shortened, and the rapid lubrication response capability under the starting and stopping working conditions is improved. Meanwhile, when the modified DLC thin film is subjected to opposite grinding with H-DLC, the modified DLC thin film can keep excellent lubricating property in 30000 abrasion cycles.

This utility model discloses an arc-shaped bevel worm gear reducer device with a clutch function, including a housing, an input shaft, and an output shaft. An arc-shaped bevel worm gear is mounted on the input shaft, and a conical worm wheel is slidably connected to the outer wall of the output shaft, with the arc-shaped bevel worm gear and the conical worm wheel engaging with each other. A clutch mechanism that engages with the conical worm wheel is provided inside the housing. The arc-shaped bevel worm gear has good lubrication characteristics and tooth surface contact stress characteristics, which is beneficial for improving the transmission performance and service life of the bevel worm gear reducer. The arc-shaped bevel worm gear meshes with the conical worm wheel. A movable sliding key sleeve, under the action of a shift fork, drives the conical worm wheel to move axially along a fixed key on a fixed shaft, realizing the separation and engagement of the bevel worm gear, thereby interrupting and transmitting power. Three pin holes and limiting pins that engage with the pin holes are provided, allowing for insertion as needed to maintain the working state of the arc-shaped bevel worm gear reducer, thus fixing the state of the operating handle.