摘要:
In producing CO.sub.2 from subterranean reservoirs at conditions apt to cause both aqueous and CO.sub.2 -rich liquid phases to flow in pipes conveying the fluid, the formation of hydrates is prevented by adding a specified type of inorganic electrolyte hydrate inhibitor in proportions capable of maintaining an effective concentration within the aqueous liquid phase.
摘要:
The invention is a novel drilling fluid additive comprising particles of elastomer which are capable of swelling upon contact with a hydrocarbon fluid. The swelling of the elastomer is gradual, allowing the elastomer to reach the lost circulation zone before significant swelling occurs. Once in the lost circulation zone, the polymer expands sealing off the lost circulation zone. A method for preventing drilling fluid loss is also provided.
摘要:
A method and system for job backfill scheduling dedicated heterogeneous nodes in a multi-node computing environment. Heterogeneous nodes are grouped into homogeneous node sub-pools. For each sub-pool, a free node schedule (FNS) is created so that the number of to chart the free nodes over time. For each prioritized job, using the FNS of sub-pools having nodes useable by a particular job, to determine the earliest time range (ETR) capable of running the job. Once determined for a particular job, scheduling the job to run in that ETR. If the ETR determined for a lower priority job (LPJ) has a start time earlier than a higher priority job (HPJ), then the LPJ is scheduled in that ETR if it would not disturb the anticipated start times of any HPJ previously scheduled for a future time. Thus, efficient utilization and throughput of such computing environments may be increased by utilizing resources otherwise remaining idle.
摘要:
A method of assigning replacement rows and colums in a two dimensionally redundant array in which if the number of failures along a row exceeds the number of remaining redundant columns, then replacing that row with one of the redundant rows. The process is repeated in the opposite direction with the number of remaining redundant rows and columns being properly decremented. The process of reversing directions continues until the above condition is no longer satisfied.
摘要:
The invention relates to the use of pre-engineered pills for use with drilling mud. By introducing pills of ground elastomer into the well, the pills can improve the lubricity of the mud as well as aiding in wellbore cleaning, prevention of bit balling and reduction of fluid loss to thief zones.