Cutting dryer maintenance

GN designed GNCD930 vertical cutting dryer is already finished and tested in the field. Its specs is similar with CSI cutting dryer WSM-04. Its rotary speed is 890rpm, and processing rate is 30~50tons per hour( actual data). Max bowl diameter is 930mm.

Daily inspections should be made at start-up until a permanent maintenance schedule can be set up. Once a schedule has been established, only routine inspections and general observations will be necessary.

Cutting Dryer
Cutting Dryer

Cutting Dryer Maintenance

1 Basket:

Basket is not wear part, unless its damage caused unbalance, you do not have to replace it before that.

2 Filter-screen:

it is important to always maintain flite to screen clearance,it is critical to the proper machine performance.

3 It is very important to inspect the condition of the rotor at every screen change. This is necessary as the rotor is the connecting member between the external drive shaft and the basket, and is one of the members which is subjected to normal abrasive wear by the product.

4 LUBRICATION

Except for the motor bearings, which are grease lubricated, all bearings are oil lubricated. A direct driven gear pump, mounted along the outer base, circulates oil through the gear unit and overflows to the outer external shaft bearings.

The oil should be changed every 1600 hours of operation or every three months, whichever occurs first. To change oil, drain oil from the gear unit and drain pot.

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Degasser

Horizontal vacuum degasseris the most common degasser applied at present. A degasser is used in drilling to remove gases from drilling fluid which could otherwise form bubbles. It can remove virtually all entrained gases, including hydrogen sulfide and corrosive oxygen, from drilling fluid and reduce the threat of dangerous and costly blowouts while restoring mud to its original density for reuse in the active mud system.

degasser
degasser

GN standard ZCQ270 & ZCQ360 can process up to 1200gpm & 1500gpm, for requirement of processing rate less than 1000gpm, ZCQ270 will be your best choice.

Features:

1 skid mounted, compact foot print design

2 Self-Contained, do not need a centrifugal pump for feeding

3 Simple operation

For small amount of entrained gas in a drilling fluid, the degasser can play a major role of removing small bubbles that a liquid film has enveloped and entrapped. In order for it to be released and break out the air and gas such as methane, H2S and CO2 from the mud to the surface, the drilling fluid must pass degassing technique and it can be accomplished by the equipment called degasser which is also a major part of a mud systems.

Working principle of horizontal vacuum degasser

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Vacuum Collection System for drilling cutting

Together with Vacuum Collection System, Screw conveyor is also applied for collection of drilling cuttings? What is their difference in function?

Screw conveyor is the main equipment to collect drill cuttings from solids control equipments, in actual application, vacuum unit is used to transfer the cuttings from one screw conveyor to another, then the 2ndscrew conveyor transfer the cuttings to cutting dryer. Otherwise the position ofshould be higher than the inlet of cutting dryer, or the position of cutting dryer should be very low, it is not convenient to locate them in site.

drilling waste management
drilling waste management

The M-I SWACO vacuum collection system consists of Cuttings Collection Boxes, a Rig Vacuum Tank, a vacuum rotary hopper and a Vacuum Power Skid. It has the advantages of being a totally contained system powerful enough to transport both fluids and cuttings vertically as well as horizontally over fairly long distances. Modular and adaptable, the system minimizes the amount of floor space required for operation. Further, once on-line, the system does not interrupt the drilling operation.

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Pill tank for mud circulation system

Pill tank is a section in the mud suction tank which is used for heavy mud mixing and conditioning ( slug tank).

150bbl Pill Tank specs:

pill tank
pill tank
  • Active Capacity 150 BBL—Single 150 BBL Compartment
  • Dimensions: Length 26’ 6” x Width 7’ 9” x 10’ Height Weight: 22,000 lbs
  • Construction: Three runner oilfield standard design
  • Top Rail Height: 36” swing down for transport
  • Internal ladder rungs with removable walkway for tank access
  • Mix/Transfer pump: 8x 6x 14 w/ 75 hp
  • Power Requirements: 460V/60HZ or 380V/50HZ, 3phase
  • Two Tank Agitators: 15 hp with shaft stabilizer
  • Shear pump: 60HP
  • Mixing Hopper: Flow Process Technologies 6” High capacity
  • Mud Guns: Two 2” mud guns

GN solids control can produce all of the above and provide complete solution, not limit to trip tank, mud suction tank, recycling tank, mud agitator, mud gun, centrifugal pump, shale shaker, mud cleaner, decanter centrifuge, etc complete solids control system.

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