MATERIAL OF TUBULAR FILTER FROM SHAPE-PRESERVING ALLOY WITH SUPERHIGH STRAIN RETURN, METHOD OF PRODUCTION AND APPLICATION Russian patent published in 2025 - IPC E21B43/08 

FIELD: obtaining oil from wells.

SUBSTANCE: group of inventions relates to oil and gas industry, in particular to prevention of sand passage during drilling and completion of oil and natural gas wells. Material of tubular filter from shape-preserving alloy with superhigh strain return is obtained by cold pressing of billets. Billets are produced by winding spiral windings from wire from NiTi alloy. Elements of spiral windings from wire from shape-preserving alloy NiTi in billets correspond to each other or are characterized by mutual interlocking. Material of tubular filter from alloy at temperature of 100-350 °C is characterized by 43-83% deformation with possibility of recovery. To implement the method of producing tubular filter material from a shape-preserving alloy with superhigh strain return, spiral windings are obtained: after cleaning, a wire from the shape-preserving alloy NiTi is spirally wound on a central rod to obtain spiral windings. Billets are obtained from the obtained spiral windings by winding them. Elements of spiral windings from wire from shape-preserving alloy NiTi in billets correspond to each other or are characterized by mutual interlocking. Billets are placed in mould and cold pressing is performed to produce material of tubular filter from shape-preserving alloy with superhigh strain return. Disclosed is use of material of tubular filter from shape-preserving alloy with superhigh strain return in protection from sand during drilling and completion of oil and natural gas wells.

EFFECT: increased resistance to high temperatures, provision of spontaneous volumetric deformation under conditions of high temperature and possibility of adjustment of diameter of holes providing filtration effect.

10 cl, 18 dwg, 4 tbl