GN has 6 units of Vavc-Flo degassers in stock, their specs as below:

Model: GNCQ270

vacu-flo degasser

Flow Rate:1200gpm

Total power: 22+3KW

Dimension:2000 length x 1000 width x 1670mm height

Weight:1350kg

All of them are brand new and with electricity 440V/60HZ, 3 phase, explosion proof. We can change the voltage according to your requirement.

GNCQ270 Vacu-Flo degasser V.S. Derrick Vacu-Flo 1200

Their flow rate is same, just the dimension and weight is different. The most different is that GNCQ270 vaco-flo degasser do not need feeding pump.

Vacu-Flo Degasser normally called vacuum degasser. It uses the suction of the vacuum pump to establish an under balanced pressure area in the vacuum cylinder and causes the drilling fluid into the hollow shaft of the rotator through suction pipe under the atmosphere pressure, and then lets the fluid spray to the walls of the cylinder from the windows on the hollow shaft, now the gas bubble cut in the mud may break and run off Continue reading →

Drilling fluid is used to aid the drilling of boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling rigs, drilling fluids are also used for much simpler boreholes, such as water wells. Liquid drilling fluid is often called drilling mud.

In drilling operations, solid weighting materials are commonly added to the drilling fluid to give sufficient density to the fluid to hinder inflow of oil or gas into the wellbore from the down-hole formation. Weighting material sag. i.e. sedimentation of weighting material from the drilling fluid, has been and is currently one of the biggest challenges within the drilling fluids industry as it can lead to well control problems, lost circulation, hindered running of casing/liner, insufficient displacement etc.

weighting material adding equipment

 CALCIUM CARBONATE is Acid souble weight material.It is used to prevent fluid invasion of permeable zones, and to prevent loss of circulation during drilling, workover, and completion activities. CALCIUM CARBONATE is applicable in all drilling fluids, aqueous and non-aqueous. It can be used to prepare a pill for spotting purposes. is also used as an acid soluble weighting material for drill-in or workover fluids with a density of 14.0 ppg or less.

HEMATITE is for extremely high density mud.It is used to obtain mud weights in excess of 20.0 ppg in water based drilling fluids, 19.0 ppg in oil based drilling fluids, or any time that exceptional control is required of solids percentage for rheology control.

Barite is the most used weighting material, has a density of 4.1. It is used for increasing the density of fresh water, salt water, and oil based muds.

Barite is added through a hopper, GN designed Jet mud mixer is used for barite adding, it consist of venturi hopper and mixing pump. It can be used with the complete mud system, also it can be used separately.

Jet shearing unit is consist of venturi hopper and shearing pump, which can cut the big section into small pieces and add weighting material then mix them. It is commonly used in oil & gas drilling solids control system, usually it is installed on the weighting tank or mixing tank. Sometimes it is used together with decanter centrifuge.

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 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.

Continue reading →

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

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

Continue reading →

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 2^ndscrew 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

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.

Continue reading →

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

• 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.

Continue reading →

Mud cleaner is a combination of shale shaker, desander, desilter for oilfield drilling mud system, NOV Brandt also called it mud conditioner. There are many suppliers for mud cleaners, Derrick, MI-SWACO, Brandt, GN Solids Control, here we will make a comparison of the 4 model of mud cleaners. Take 1000gpm unit for example:

GN mud cleaner

1 Derrick Mud Cleaner Features:

A round desilter manifold and/or a desander manifold is mounted in a cone discharge collection pan installed over the vibrating screen.Underflow from the hydrocyclones is received by the collection pan, which may feed directly to discharge or onto the vibrating screens for additional processing.

Derrick’s standard desander cone and desilter cone is 10” & 4”

2 MI-SWACO Mud Cleaner features:

Low profile through

Bypass intergral

Vertical installation method of desilter cone

MI-SWACO’s standard desander cone and desilter cone is 12” and 4”

3 Brandt Mud Cleaner

Patented pin-and-hole screen securing system

Brandt’s standard desander cone and desilter cone is 10” or 12” and 4”

4 GN Mud Cleaner

Small footprint, compact design; desilter cone is installed vertical but inclined, GN standard desander cone and desilter cone is also 10 inch and 4 inch, which is same with Derrick’s.

GN mud cleane is convenient to ship it by containers, GNZJ703-2S12N(1000gpm) footprint is only 2403x1883x2195mm, but same treating capacity, Brandt Cobra 16/2 Mud Conditioner dimension is 2692 mm x 2032 mm x 2565 mm. For same treating capacity and function equivalent, GN mud cleaner is with the smallest size.

MI-SWACO CD-250 centrifuge is designed for the purpose to solve a problem that there is no proper model centrifuge for small drilling process application with a compact dimension, for example, HDD, diamond core drilling for mining. It should meet 3 important points: 1 high separation efficiency, 2 tight space, 3 economic solution. GNLW220 centrifuge is designed for the similar purpose.

GNLW220 centrifuge

Comparison of MI-SWACO CD-250 centrifuge & GNLW220 centrifuge

Both of them are very compact footprint units, and designed with easy maintenance in the field and continues operation in harsh environment. Compared with CD-250 centrifuge, GNLW220 is more competitive in price and delivery time, they are function equivalent.

Continue reading →

GN designed centrifuge mud tank for oilfield and dredging project, with 1 unit of GNLW553VFD decanter centrifuge(or other model available) and Nemo pump to feed the centrifuge, the centrifuge tank is divided into 2 compartment, the mud after treated by shale shaker, desander/desilter flow or be pumped to compartment 1, then Nemo pumppumped it from the compartment 1 to the centrifuge for processing, the clean drilling mud dropped into compartment 2, which can be pumped to other application or flow to anywhere required.

centrifuge mud tank

In oilfield application, sometimes mud hopper unit also installed on centrifuge mud tank, the mud which will be feed to centrifuge is with solids smaller than 20 microns, it has been separated by desilter cone. After treated by decanter centrifuge, the max solids remained in the drilling fluids is smaller than 5 microns, it is called “clean mud”. The clean mud may be weighted in pill tank/compartment and mixed by mud mixing hopper & mixing pump.

In Dredging project, centrifuge mud tank is applied after dredging slurry separation system, after treated by the desander ( or sometimes desilter), the solids remained in the slurry may be too fine to be separated out by the centrifuge, so you need a flocculation tank before centrifuge mud tank. After flocculation, the mud is concentrate so It is easy for centrifuge to separate it, this is for better performance. So you have to use a positive displacement pump to pump the flocculated mud to centrifuge, otherwise the centrifugal pump will break it off. Sometimes filter press will replace the centrifuge, but efficiency of filter press is not so dissatisfied, so people use large treating capacity centrifuge instead.

Continue reading →

Screw conveyors, sometimes called augers or auger conveyor, are used as an efficient way to move a wide variety of materials. The auger is used to move material along a path using a helical screw. The process of drilling with a helical bit involves aspects of both: the creation of the hole with the tip of the bit is drilling, while moving the waste material out of the hole along the helical path is augering. Not all drilling involves augering (oil field drilling uses a pump to move the material). Screw conveyors in oilfield are often used horizontally or at a slight incline as an efficient way to move drilling fluids with drill cuttings.

Auger screw for oilfiled

Main components of Auger screw:

Motor, control panel, Screw( including blade and shaft),Conveyor housing, Supporting feet and saddles, Feed and discharge spouts, Cover, Through end, etc.

Screw consists of a several of blades of helix shape welded to a pipe or shaft. It moves the material. The following specs should be calculated carefully for proper use: Flight outside diameter, type of blades, spacing between the blades, thickness of the external diameter and interior shaft and rotation direction.

Continue reading →