Abstract: A high-strength Portland cement slurry for ultra-high-temperature cementing, a preparation method therefor and an application thereof. In parts by weight, the composition of the cement slurry comprises: 100 parts of Portland cement, 4-6 parts of a high temperature anti-cracking material, 80-105 parts of a high-temperature reinforcing material, 70-78 parts of water, 0.5-1.5 parts of a dispersant, 1-3 parts of a fluid loss reducer, 0.5-2.5 parts of a retarder and 0.2-0.5 parts of a defoamer; the high-temperature reinforcing material is a combination of acid-washed quartz sand, metakaolin and aluminum sulfate, a combination of acid-washed quartz sand, metakaolin, feldspar and sodium sulfate, or a combination of acid-washed quartz sand, metakaolin, feldspar and calcium nitrite. The cement slurry has good settling stability, rapid strength development in low temperatures, high compressive strength of cement stone at a high temperature of 600° C.

Abstract: An inflatable water slide, an entertainment device, and a pool are provided. The water slide comprises a slide body that includes a first inflatable chamber having an inclined top surface. The water slide also includes a water spray device located on top of and extending along the inclined top surface of the slide body, and the water spray device is adapted to spray water onto the inclined top surface of the slide body. The entertainment device includes the inflatable water slide and an elongated slide sheet connected to the inflatable water slide. A pool may include the water slide of the present disclosure. The inflatable water slide, entertainment device, and pool of the present disclosure enable water to be sprayed onto the slide body more effectively than in conventional designs, thus preventing situations where water cannot be sprayed onto the slide body.

Abstract: An inflatable water slide, an entertainment device, and a pool are provided. The water slide comprises a slide body that includes a first inflatable chamber having an inclined top surface. The water slide also includes a water spray device located on top of and extending along the inclined top surface of the slide body, and the water spray device is adapted to spray water onto the inclined top surface of the slide body. The entertainment device includes the inflatable water slide and an elongated slide sheet connected to the inflatable water slide. A pool may include the water slide of the present disclosure. The inflatable water slide, entertainment device, and pool of the present disclosure enable water to be sprayed onto the slide body more effectively than in conventional designs, thus preventing situations where water cannot be sprayed onto the slide body.