Catalogue

PolyTGP backfilling dry mix

PolyTGP backfilling dry mix is intended for preparation of backfilling compositions for control of lost return areas in highly permeable fissured and fissure-cavernous reservoirs. The composition is acid-soluble and can be used in the section of productive formations to control lost circulation.
Four grades are available:PolyTGP is recommended for use in wells with normal and abnormally low reservoir pressure and temperature up to 90 °С when drilling wells using aqueous and saline fluids.
PolyTGP-S is recommended for use in wells with abnormally high reservoir pressure and high reservoir temperature.
PolyTGP-B is used for temporary blocking during well killing.
PolyTGP-U can be used with water and oil-based drilling fluids.

 

Product specs

Parameter	PolyTGP	PolyTGP-S	PolyTGP-B	PolyTGP-U
Component 1
Appearance	Gray to brown loose material
W/S (mixing liquid and dry material ratio)	1.4	1.18	1.26	0.375
Solution density, kg/m3, NLT	1300	1700	1350	1450
Spreadability of suspension on KR-1 cone, mm, NMT	250			200
Component 2
Appearance	Light yellow crystalline powder
Density of 55% aqueous solution of the composition, kg/m3	1300–1350

 

Application

PolyTGP backfilling dry mix is used for preparation of backfilling compositions by dissolving Component 1 in fresh or saline aqueous solutions followed by mixing with Component 2 solution above the area or directly in the lost return area.After the solutions are mixed in the lost return area, it irreversibly hardens after a certain time and forms a pill with a plastic strength exceeding 30 kPa. This way, the lost return of drilling fluid or cement slurry is reliably controlled.The amount of prepared backfilling composition is determined by the thickness of the exposed lost return area and hydrodynamic characteristics of the absorbing section.

 

Packaging

PolyTGP backfilling dry mixture is packed into 25 kg polypropylene bags with a polyethylene liner containing the calculated amount of Component 2.



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