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Apr 17

Bored Pile Construction

Double Deck Mud Cleaner

Bored pile is widely used in massive civil infrastructure and industrial construction such as the tall building or bridge work. Less disturbance surrounding soil, little noise and  much economic drilling than the conventional drilling are the main advantages of bored pile. However, drilling engineers have to do mud investigation and decide which drilling technology has to be carried on. Piling contractors decide the correct drilling technology and solids control equipment minimize influence on the environment and reduce the cost.

GN double deck shale shaker with hydrocyclone is  perfect solids control system matching with the bored pile. The working function will be introduced below


drilling mud is pumped to bottom deck (2) shaker screen separate large particle to disposal site and fluid penetrate to mud tank(3), the slurry pump(4) will transfer drilling fluid to desander cone(5) for further separation. The solids/sand will be separated on the top deck (6) to discharge. The cleaning fluid will store in tank (7)


Schemetic Graph

It is a compact and economic design. The smart solids control system  wins massive compliments from our clients. Please contact with us if you need more information.


written by GN Desander Desilter \\ tags:

Jan 04

As one of the top Solids Control Equipments manufacturer in the world. GN offer a compelte line of solids control equipments and some drilling waste management equipments for the oil/gas industry.GN developed Vertical Cuttings Dryer has been proven to provide a dramatic reduction in drill solids waste discharge and to help reclaim the oil-based fluids or synthetic based fluids from cuttings.

Vertical Cuttings Dryer

Vertical Cuttings Dryer

The high-capacity GNCD930 Vertical Cuttings Dryer is a screen-type centrifuge which designed for the continuous feed and efficient throughput necessary for drilling operations.Convenient access to normal wear parts helps simplify maintenance and minimize unit downtime.

Setting Up Cuttings Dryer Operations

Successful Cuttings Dryer operations are not as simple as installing and running the cuttings drying equipment. The fluids recovered by the dryer usually contain high levels of low gravity solids that can cause significant problems if returned directly to the drilling fluid system. GN not only can offer Cuttings Dryer,But also Decanter Centrifuge, Screw Pump, Augor, Shale Shaker, etc.


Model: GNCD930
Feed Capacity: 30-50 Tons/H
Max Bowl Diameter: 930mm
Screen Opening: 250/350/500 Microns
Rotary Speed: 890 RPM
Main Motor: 55Kw
Oil Pump Motor:0.55Kw
Dryness Efficiency: <5%
Dimension: 2780X2080X2450mm
Weight: 6500Kg

written by GN Desander Desilter \\ tags: , , ,

Apr 25

GN solids control can provide HG dryer ,cutting dryer,and material feeding screw conveyer for drilling waste management.For afterward work can be done by below equipment.

Anaerobic Thermal Desorption Unit (ATDU)

 The material enters the ATDU and depending on the application, can be heated up to 1,400ºF (760ºC). The ATDU is equipped with a variable speed rotary drum drive and adjustable slope. The rotational speed and the slope of the rotary desorber control the flow of the feed through the unit. Depending on throughput, material residence times over sixty minutes can be realized.





Solids Discharge & Conditioning System

 The processed solids leave the ATDU via a high temperature resistant screw conveyor through a double tipping valve (airlock). The airlock ensures that oxygen-deficient conditions within the ATDU are maintained. The solids are cooled and hydrated in a mixing chamber. Water is introduced in the mixer/cooler to prevent fugitive dust and to protect equipment and personnel from the hot solids. Conveyor then transfers the conditioned material to a storage area.

Optional indirect cooling screws are available for applications requiring zero moisture content in discharged solids or where clean water is not readily available.

Solids discharge

Solids discharge

 Vapor Recovery Unit (VRU)

 The process gasses leaving the ATDU are normally between 800ºF – 1000ºF (430ºC – 540ºC). The volume of gasses to be treated depends on the contaminants and the feed rate through the plant. The off-gas flow rate can range at approximately 1000-5000 ACFM (30 – 140 m3/min).  It collects the larger particulate matter from the exhaust gas stream prior to the Scrubbers. The collected dust is then discharged through air-sealed valve into the soil-conditioned system. After the mechanical collector, the gases first pass through the Pre-Scrubber, where they are scrubbed with water to reduce the temperature and remove most of the oil and the remaining particulate matter. The Venturi Scrubber will remove almost all the remaining particulate from the gas stream. However, to achieve greater removal efficiency an additional separator with Demister is implemented after the Venturi.

Water Treatment Unit (WTU)

Water treatment unit

Water treatment unit

 The Water Treatment Unit is designed to separate the process oil-water-solid mixture after the VRU into three separate streams of oil, water, and solids and to cool the stream of process water for further use in the VRU scrubber system.

The process mixture undergoes a primary separation through an Interceptor before entering the Oil / Water Separator(s) for more fine separation.

written by GN Desander Desilter

Mar 29

Solids Removal Theory

Drilling fluid and equipment maintenance cost can decrease greatly when proper solids control practices are utilized. From a fluid control stand point it would be desirable in most cases to remove all drilled solids. Although this is possible, it would be cost prohibitive. The goal of a solids control system is to achieve the balance between mechanical solids separation and dilution that will result in drill solids being maintained at an acceptable level with a minimum of cost.

GN solids control system

GN solids control system

Benefits of Low Solids In Drilling Mud

  1. Increased drilling penetration
  2. Increase bit or back reamer life
  3. Reduce mud cost
  4. Reduce triplex mud pump, mud motor & surface equipment maintenance cost.
  5. Reduced clean up & haul off or disposal cost

    Shale shaker

    Shale shaker

These benefits are the result of planning prior to boring and are accomplished through the use of properly designed, sized and operated solids removal equipment. It is the responsibility of the boring crew to become knowledgeable in the proper use of the equipment; otherwise the potential benefits may be reduced or nullified.

Cutting dryer

Cutting dryer

Methods of Controlling Solids

  1. Mechanical treatment
  2. Chemical treatment
  3. Dilution of mud with water
  4. Discard mud & mix new mud.

All of the above with the exception of Mechanical treatment in most cases are cost prohibitive.

written by GN Desander Desilter \\ tags: , ,

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