LiDENS Low Density High Strength Cement Slurry Technology

n  Technical Introduction

    Developed for cementing operations in low-pressure formations, LiDENS offers a low-density, high-strength cement slurry system with adjustable density ranging from 1.10 to 1.50 g/cm3 using particle close packing technology. Comprising polymer fluid loss agent, low-density graded mixed material, lightening agent, reinforcing agent, dispersant, and other components, this system ensures compressive strength of cement stone cured for 24 hours ≥ 3.5MPa, making it ideal for cementing in special low-temperature, low-pressure, and high-risk leakage sections.

n  Technical Features

    ( 1 ) Suitable for ultra-low temperature environments (as low as 3°C) during cementing operations;

    ( 2 ) Capable of achieving ultra-low density (as low as 1.10 g/cm3) for cementing.

    ( 3 ) Provides high early strength and stable performance for cement stone.

n  Main Components of LiDENS

    ( 1 ) Polymer fluid loss additive (FLO-2), recommended dosage: solid type 0.7 ~ 2 %; liquid type: 3 ~ 8 %;

    ( 2 ) Low-density graded mixed material (LHT-5), recommended dosage: solid type 30 ~ 200 %;

    ( 3 ) Organic coagulant (ACC-6), recommended dosage: solid type 2 ~ 4 % ; liquid type : 6 ~ 8 % ;

    ( 4 ) Polymer dispersant ( CF49L ), recommended dosage : solid type 0.5 ~ 3 % ; liquid type : 0.2 ~ 1.5 %;

    ( 5 ) Modified silicone defoamer ( DESL ), recommended dosage : liquid type : 0.2 ~ 0.5 % ;

    ( 6 ) Silicon reinforcing agent ( PF-2 ), recommended dosage : solid type 6 ~ 10 %;

    ( 7 ) Microbead lightening agent ( DWR-600 ), recommended dosage : solid type 40 ~ 100 %. 

n  Key Technical Indicators

n  Application

    LiDENS is primarily utilized in low-pressure or deep well shallow surface cementing operations by Sinopec and CNOOC, this technology has been implemented in over 1000 wells.