Monthly Archives: May 2017

Desander Application Purpose and Some Notes Attention

Desander is the 3rd purification equipment. The popular desander cones are 8~12″. DC desander including 3 types based on bottom shaker configuration. Normally 8in, 10in or 12in diameter.

The application of desanders will depend upon the type of mud in use. A desander: shall be run continuously with unweighted water based mud  to maintain low mud gradient, in top hole sections only may be run sparingly with weighted water based mud shall never be used with oil based mud.

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SONY DSC

The purpose of use Desanders are :

1.To maintain sand content of mud below 0.5%.
2.To prevent overloading of desilters.
3. A feed rate of 300 – 400 gpm shall be used.

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SONY DSC

Desanders shall be balanced to produce a spray discharge using the procedure outlined above before use.Cones shall be stripped and cleaned after every period of continuous use. For optimum performance, the desander overflow should be routed to the desilter suction tank.

Note please Since, in practice, the cut point of most 12” cones may be of the order of 200 – 220 microns for an unweighted water based mud, utilisation of screens of finer than 80 mesh may negate the need for desanders.

Drilling Fluids play an integral role in oil and gas exploration and production.

Drilling Fluids play an integral role in oil and gas exploration and production. When a new well is drilled, some form of fluid is needed. The base of this drilling fluid, or mud, can be freshwater or saltwater (brine) or it may be an oil- or synthetic-based liquid.

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The type of fluid and the additives used are determined in part based on the composition of the rock being drilled into. Cost and environmental impact are also considerations. The mud may also be modified as drilling progresses and the underground environment changes. The mud serves a number of important functions:

lubricating and cooling the drill bit, thereby extending its life
transporting rock fragments (cuttings) to the surface,
preventing the wellbore from caving in before the casing is inserted, and
preventing the oil or gas from entering the well before it’s completed.
Ideally and increasingly, this fluid is recycled during drilling. To facilitate reuse, cuttings are allowed to settle out in a pit and the resulting liquid is pumped back to the wellbore.

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Water is often a natural byproduct of the drilling and production process. Water may be trapped underground along with the oil and gas. Sometimes this produced water is incorporated and used in the drilling process.

This simple overview illustrates the fact that drilling a new well is a complicated process with many moving parts — literally. A variety of providers are necessary at different times to deliver their unique services until a well is completed.

Multiple functions of DC Double deck Mud cleaner

As is known to all, for Mud Cleaning System treatment, there is single deck shaker and double deck shaker. Considering the fact field application of Mud Cleaning System is combination of cyclones and shale shaker.

In some cases such compact footprint can save location around the mud cleaner and save cash for the operator. We have many design models of double deck mud cleaners it depends upon the treating capacity you necessary as well as your budget.

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SONY DSC

Double deck mud cleaner DCQJ may play a role as desander, desilter and double steps of shale shaker. The low deck screen is first separation part of mud cleaner with comparable coarse screens as the upper deck is finer like a drying shale shaker for that desander and desilter cones.

We make use of the dual function double deck shale shaker within the compact style bored piles desander unit, and make a mud cleaner, shale shaker, hydrocyclones, centrifugal pumo, mud hopper in a single skid. It may be utilized for HDD, bored piles desander unit, water well drilling, trenchless,and so on projects.

If you have interesting of DC Mud cleaner, please contact us.

Matching using the mud gas separator and vacuum degasser in mud system

In oilfield mud system, there are two equipment used for removing the harmful gas from drilling fluids. They are mud gas separator and vacuum degasser.

Vacuum degassers utilize negative pressure to withdraw entrained gases from the mud. In order for this to work, mud is pumped through a venturi, which develops a negative pressure, thus sucking mud into the unit. The mud then flows over dispersion plates, arranged either horizontally or vertically, creating thin sheets of gas-cut mud. These dispersion plates bring entrained gases closer to the surface for easy removal by a stand-alone vacuum pump. The choice between horizontally or vertically mounted units is typically based on the footprint requirements of the specific rig.

vacuum degasser

Degassers are used to remove the small entrained gas bubbles left in the mud by the mud/gas separator. These units are positioned downstream from mud/gas separators, gumbo removal equipment (if utilized), shale shakers and mud conditioners (if utilized), while hydrocyclones and centrifuges follow in the arrangement.

Mud/gas separators and degassers mechanically remove entrained gases such as hydrogen sulfide, carbon dioxide and natural gas from the mud system. Entrained gas can reduce the hydrostatic head of the mud column and can cause catastrophic well control problems. BRANDT manufactures both mud/gas separators and degassers.

mud gas separator

Mud/gas separators are the first units of solids control equipment arranged to treat mud. As such, they process all of the mud from the flowline before the mud reaches the primary shale shakers. The units have no moving parts and rely on the density difference between the gas and the mud for removal. The process is simple, yet very effective.

Type of drilling fluid and the additives used in oilfield

Fluids play an integral role in oil and gas exploration and production. When a new well is drilled, some form of fluid is needed. The base of this drilling fluid, or mud, can be freshwater or saltwater (brine) or it may be an oil- or synthetic-based liquid.

The type of fluid and the additives used are determined in part based on the composition of the rock being drilled into.

drilling fluid

Cost and environmental impact are also considerations. The mud may also be modified as drilling progresses and the underground environment changes.

Ideally and increasingly, this fluid is recycled during drilling. To facilitate reuse, cuttings are allowed to settle out in a pit and the resulting liquid is pumped back to the wellbore.

Water is often a natural byproduct of the drilling and production process. Water may be trapped underground along with the oil and gas. Sometimes this produced water is incorporated and used in the drilling process.