C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/035 (2006.01) E21B 37/00 (2006.01)
Patent
CA 2575150
The invention provides well drilling and servicing fluids, and methods of drilling, completing, or working over a well therewith, preferred fluids comprise an aqueous liquid, a water soluble polymer viscosifier (preferably xanthan gum), a polymeric fluid loss control additive (preferably a partially depolymerized partially crosslinked hydroxyalkyl ether derivative of starch or a hydroxyalkyl ether derivative of a partially crosslinked and partially depolymerized starch), and as a bridging agent a particulate magnesia that has an Activity Index greater than about 800 seconds, preferably from about 800 seconds to about 3000 seconds.
L~invention concerne des fluides de forage et d~entretien de puits et des procédés de forage et de travaux liés aux puits les employant. Les fluides préférés comprennent un liquide aqueux, un améliorant de viscosité polymère hydrosoluble (de préférence la gomme de xanthane), un additif polymère de contrôle de la perte de fluides (de préférence un dérivé éther d~hydroxyalkyle partiellement réticulé et partiellement dépolymérisé de l~amidon, ou un dérivé éther d~hydroxyalkyle d~un amidon partiellement réticulé et partiellement dépolymérisé), et, en tant qu~agent de pontage, de la magnésie particulaire ayant un indice d~activité supérieur à environ 800 secondes, de préférence d~environ 800 secondes à environ 3 000 secondes.
Dobson James W. Jr.
Fernandez Jorge M.
Munoz Trinidad Jr.
Todd Bradley L.
Tresco Kim O.
Dobson James W. Jr.
Fernandez Jorge M.
Halliburton Energy Services Inc.
Kirby Eades Gale Baker
Munoz Trinidad Jr.
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