Low-viscosity cement composition
AssigneesEniricerche S.p.A., Snamprogetti S.p.A.
InventorsAldo Prevedello, Goffredo Romano
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Abstract
Disclosed is a low-viscosity cement composition, useful in the field of oil drilling, comprising cement, water and an additive obtained by salifying into the alkali-metal, alkali-earth metal, or ammonium salt, the sulphonated and oxidated products derived from the reaction between sulphur trioxide and cookery tar or sulphur trioxide and fuel oil from steam cracking; the cement composition is endowed with improved rheological characteristics such as a low-viscosity value without substantial changes in the pumping times, even at high temperatures and pressures.
Claims16
A method of cementing a bore lining column, comprising:
- cementing a bore lining column with a low-viscosity cement composition comprising:
- i) cement;
- ii) water;
- and
- iii) an additive produced by neutralizing the sulfonated and oxidized products derived from the reaction between sulfur trioxide and fuel oil from steam cracking, with an alkali metal, an alkali earth metal or an ammonium salt.
A method of sealing a porous formation comprising sealing a porous formation with a low-viscosity cement composition comprising:
- i) cement;
- ii) water;
- and
- iii) an additive produced by neutralizing the sulfonated and oxidized products derived from the reaction between sulfur trioxide and fuel oil from steam cracking, with an alkali metal, an alkali earth metal or an ammonium salt.
Dependencies are inferred from the claim text.