SELF-ADVANCING PROPPANT, ITS PREPARATION AND USAGE Russian patent published in 2018 - IPC C09K8/80 C09K8/88 C09K8/90 C09K8/92 E21B43/267 

FIELD: oil industry.

SUBSTANCE: invention relates to development of liquid minerals such as oil, natural gas, shale gas. Method of preparing self-suspending proppant, characterized in that it comprises the following steps: usage as a filler of one or more of the following materials: quartz sand, expanded clay, metal particles, spherical glass particles, sintered bauxite, sintered alumina, sintered zirconium, synthetic resin, coated sand and particles of ground nutshell, heating of the filler up to 50-300°C, cooling to temperature below 240°C, addition of an adhesive in an amount of 0.5-15 mass% of the filler and stirring when the temperature of the obtained mixture is reduced to temperature below 150°C, adding a water-soluble polymer material in an amount of 0.1-5 mass% of the filler and mixing, metallic particle is made of one or more of the following materials: carbon steel, stainless steel, aluminum alloy, iron-nickel alloy and a ferromanganese alloy, water-soluble polymer material is selected from natural polymeric, synthetic polymeric or semi-natural semisynthetic polymer material, which swells or dissolves rapidly in water, adhesive contains all materials having adhesive functions containing a natural adhesive and a synthetic adhesive, natural adhesive contains gelatin glue, biogum and mineral glue. Gelatin glue is selected from one or more the following substances: skin glue, bone glue, shellac, casein glue, albuminous adhesive and fish glue, biogum is selected from one or more of the following substances: starch, dextrin, turpentine, tung oil, arabic gum and natural rubber, mineral glue is selected from one or more the following substances: mineral wax and asphalt, synthetic adhesive is selected from one or more of the following substances: phenolic resin, epoxy resin, unsaturated polyester resin and a heterocyclic polymeric adhesive. Method of construction for fracturing by natural water, characterized in that it comprises: addition of 5-60 vol.% of self-suspending proppant, prepared as described above, to 100 vol.% of natural water as a carrier fluid to form a suspended fluid, then transportation of the received liquid in an underground layer of rocks, natural water as a carrier fluid is selected from one or more the following substances: river water, agricultural water, lake water, sea water and underground water. Invention is developed in dependent items of the formula.

EFFECT: technical result is the reduction of environmental pollution and the cost of the process while preserving the properties.

8 cl, 30 ex, 16 tbl, 1 dwg