Patent ID: 11898415
Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC E  C | IPC C  E

Claim 0:
1. A method for cementing a subterranean well, comprising:
preparing a cement slurry comprising water, a hydraulic cement and particles of an oil-absorbent material, wherein the particles absorb a non-aqueous component of a drilling fluid and alter rheological properties of the drilling fluid within the subterranean well, and wherein an amount of the oil-absorbent material particles varies, in portions of the cement slurry, between 0% by weight of the cement (BWOC) and 40% BWOC;
placing the cement slurry in the subterranean well and thereby creating a cement sheath in the subterranean well with a variable oil-absorbent material amount;
allowing the oil-absorbent material particles to contact the non-aqueous drilling fluid component, thereby altering the rheological properties of the drilling fluid and swelling the oil-absorbent material particles;
wherein the oil-absorbent material particles are elongated, having an aspect ratio between 1.1 and 2000 before the swelling and between 2.2 and 3500 after the swelling.