Well cementing process

Wells – Processes – Cementing – plugging or consolidating

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Details

166312, 252 855B, E21B 3316, E21B 3700

Patent

active

045880310

ABSTRACT:
Improved bonding in a well system between cement, well tubular members and the formation about the well/bore at a pay zone. Drilling fluid materials (mud, solids, filter cake, etc.) are displaced at turbulent flow conditions by a slug of concentrate consisting essentially of a water-free mixture of surfactant and alcohol. The aqueous fluid cement immediately follows the slug. Residual filter cake and tubular member are water-wetted. The cement on hardening has an improved bonding to both tubular members and formation at the pay zone.

REFERENCES:
patent: 2414668 (1947-01-01), Ratcliffe
patent: 2612954 (1952-10-01), Hamilton, Jr.
patent: 3022823 (1962-02-01), Caldwell et al.
patent: 3412025 (1968-11-01), Ostroff
patent: 3653441 (1972-04-01), Tuttle
patent: 3837402 (1974-09-01), Stringer
patent: 3884302 (1975-05-01), Messenger
patent: 4141843 (1979-02-01), Watson
patent: 4217229 (1980-08-01), Watson
Richard C. Haut, Ronald J. Crook, "Primary Cementing: The Mud Displacement Process", Paper No. 8253, Society of Petroleum Engineers of the American Institute of Mining, Metallurgical and Petroleum Engineers, Sep. 26, 1979.
Haliburton's Super Flush Spacer (1983).
Primary Cementing: The Mud Displacement Process SPE 8253 by Richard C. Haut et al. (1982).
Spacers and Their Applications in Primary Cementing; Richard C. Crook et al. (1982).

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