Drilling fluids processing Archives

March 8, 2017

OIL SYSTEMS, NITROGEN/DIESEL OIL, NATURAL GAS/OIL

A special case of liquid/gas fluid is the diesel/nitrogen or synthetic-oil/ nitrogen mixture. These systems have low viscosities and are used primarily in reentries or horizontal slim holes. They tend to require more fluid than water-based fluid systems. Annular velocities of 150–200 ft/ min are common in the horizontal section of the hole. In the drilling of slim holes, hole volumes are less than they are in the drilling of conventional holes, but strong surging occurs. A closed pressurized separator system is used when drilling with an oil/gas system (Figure 19.1.).

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February 14, 2017February 14, 2017

ELECTRIC MOTOR APPLICATIONS ON OIL RIGS

Continuous-duty electric motors are an integral part of a drillings rig’s solids-control and processing systems. Centrifugal pumps that feed hydrocyclones, circulate mud for mixing, and transfer mud to and from reserve and also into the trip tank are powered by electric motors. Shale shakers, mud cleaners, centrifuges, and pit agitators are also driven by electric motors.

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December 7, 2016

MUD CLEANER WORK WITH HEAVY DRILLING FLUIDS

Various arbitrary procedures seem to be developed by operating personnel in the field. Often a centrifuge is run for a specific number of hours per day, or a hydrocyclone bank is used for only a short period. Mud cleaners seem to also attract a variety of erroneous rules of thumb.

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October 14, 2016

Basic Solids Control Equipment for handling Gas-Cut Mud

Gas busters are a simple cylinder or baffle box at the flowline where
mixed drilling fluid and gas are roughly separated while flowing. The
drilling fluid goes to the shale shaker, and the gas is allowed to flow away or is sent to a flare line.

Drilling Mud Separators are holding tanks where mixed water, oil, and gas are allowed to separate by gravity. They have evolved in the last 50 years from simple open tanks to complex closed and pressurized tanks.
Separators can be informally divided into two groups: (1) atmospheric,
or unpressurized, and (2) pressurized, or closed

Degassers are somewhat different devices from the preceding two. The
degasser is a tank in which a vacuum and/or spray removes entrained
gas from the mud system. Degassers handle much smaller gas volumes
than do gas busters or separators but do a more complete job of
removing the gas.

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