Improving cementing quality with self-healing cementing materials

Yadrin V.V., Mardaganiev T.R., Zinatullina E.R., Galiev A.F.

DOI: 10.24412/2076-6785-2023-7-108-112

The paper presents the results of studying the properties of a grouting material with a complex additive copolymer of acrylamide and diallyldimethylammonium chloride (complex reagent SAiDDH) under high pressure and temperature conditions. Studies of the complex reagent SAiDDH were carried out with cements of various types and specific densities in conditions as close as possible to reservoir ones. The results showed that the formulation with the addition of polymer components gives high results in strength and permeability of cement stone, as well as provides the effect of self-healing of cracks and water supply channels.

Materials and methods
Laboratory studies of the complex reagent SAiDDH were carried out for swelling ability, its optimal percentage in the cement mixture was determined, which ensures the greatest self-healing effect with minimal changes in the strength characteristics of the cement stone. The self-healing effect of cement stone was tested in bench tests, which showed positive results.

cement slurry, cement stone, casing flows, quality of well fixation, swelling polymers in cement slurry, self-healing effect, complex reagent SAiDDH

Research of the work of the horizontal system of temperature stabilization of ground soils tube type in tube (GTT)

Grigoriy M. Dolgikh, Sergey N. Okunev

DOI: 10.24411/2076-6785-2019-10050

The article assesses the efficiency of the GTT system (horizontal pipe in the pipe) at different positions of the cooling pipes with a closed end (TOZK). Within the framework of studies tests were carried out at three positions of the TOZK: horizontal, slightly inclined (their far end is lowered by 0.5 m) and anti-inclined (their far end is raised by 0.5 m), at various thermal loads.

Geosynthetic Clay Lines

Sergey V. Zavyalov

AbstractThe article compares different watertight water-proofing materials. There is a description of the advantages of applying mineral geosynthetic polymer waterproofing materials.

geosynthetic waterproofing bentonite geosynthetic clay lines waterproofing materials