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Category Archives: vertical cutting dryer

DCTLL- Vertical cutting dryer get the successfully working efficiency

Vertical cutting dryer is a kind of single stage horizontal scraper discharge centrifuge. The cutting dryer can recycle liquid phase in drilling cuttings effectively and the solids phase is very dry.

The cutting dryer is suitable for water based mud, oil based mud and synthetic base mud. The recycling of cutting mud can reduce the drilling cost and environment pollution. The treating capacity is 40 to 50 tons per hour. Usually, the treated well cutting’s oil content is less than 3% and conform to the requirement of typical 6% OOC.

vertical cutting dryer

DCTLL-A550 Vertical Cuttings Dryer is the successful waste processing equipment of environmental protection. So far, In the field of drilling waste treatment, there have been many successful cases. This cuttings dryer is composed of dryer, guardrail and base. Main function is that separating the water and harmful pollutants from drilling waste through the vertical centrifugal principle.

With the new design and high quality guaranteed, DC cuttings dryers can provide operators a critical advantage to meet different stringent environment conditions in the cuttings disposal and oil drilling fields.

Special performance of DCTLL-A vertical drilling cutting dryer

Vertical cutting dryer is a new design and product of drilling waste management system. DCTLL-A vertical drilling cutting dryer is a kind of separation equipment which utilizes mechanical rotary produce centrifugal force to realize.

vertical cutting dryer

Special performance of DCTLL-A vertical drilling cutting dryer:

1. Versatility and high performance

Drill cuttings are conveyed from the shakers to the VERTI-G cuttings dryer through a variety of site-engineered conveyance systems. Maintained by programmable logic control (PLC), the flow of cuttings into the VERTI-G dryer is continuously fed to yield optimal liquid/solids separation.

2. High-speed centrifuge for maximum in liquid/solid separation

The VERTI-G cuttings dryer incorporates a high-speed vertical centrifuge that achieves maximum liquid/solid separation in large-volume processing. This mechanism makes the VERTI-G dryer one of the industry’s best performing and most dependable cutting dryers. Available in both standard size and compact configuration.

3. Improved efficiency and lower costs

The VERTI-G cuttings dryer improves overall cost efficiency by recovering costly drilling fluid that is recovered from cuttings, as well as whole mud lost from shaker failure and rig motion. Further, the VERTI-G cuttings dryer produces lower waste volumes by generating dryer solids in both oil- and synthetic-base drilling fluid systems. Reducing waste volume helps to dramatically reduce disposal costs.

DC Signed a sales contract of waste mud system with a famous Drilling Service Company

At the end of last month, customers from a well-known engineering service company in Kuwait visited Tangshan Dachuan Machinery Co.,ltd. is short for DC Solid control and had detailed negotiation on business cooperation with DC team.

The clients were interested with our drilling waste management system. DC Profession technical service engineering team explained process flow of DC drilling waste management system, working principles of centrifuge and Hi-G dryer to customers based on the live treatment system while drilling, and showed them excellent treatment effect of Hi-G dryer and centrifuge.

drilling waste equipment

As part of our drilling waste management services, we also supply highly skilled staff to ensure equipment are installed correctly and that they are fully operational and well-maintained. Our employees, who trained to provide support swiftly, are on-call worldwide 24 hours a day, everyday, to be available at a moment’s notice.

Recently, DC had successfully signed a sales & purchase contract of a set of drilling waste management with the company. For the first cooperation project, the company thinks highly of excellent products quality and after-sales services of DC and expresses its intention to develop more cooperative channels with DC Solid control in the future.

Functions of vertical cutting dryer

Vertical cutting dryer already widely used in at home and abroad. It is a vertical type centrifuge that has been proven to be one of the most effective waste management equipment for oil- or synthetic- based drilling operations.

Vertical cuttings dryer can recover up to 95 percent of drilling fluids from cuttings. The substantial reduction in liquid/oil adhesion yields retort analyses of vertical cuttings dryer discards ranging from 6 percent to as low as 1 percent oil weight. The vertical cuttings dryer can reduce the volume of drilling solids waste and associated disposal expenses, ensuring environmental regulatory compliance while maximizing recovery of valuable base fluids.

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Applications:

1. Separation of liquids (fluids) from solids.
2. Removes of up to 95 percent of oil concentration in residual cuttings.
3. Reduce drilling and waste management costs by complying with local regulations.

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Features, Advantages and Benefits:

1. The dryer is a compact design, reducing footprint and enhancing operational efficiency.
2. The redesigned effluent route improves flow from the machine, enabling faster drying.
3. An enhanced water-shield design includes upper access doors, facilitating visual inspection of the screen, basket, and effluent area.
4. The lubrication system has been relocated for better protection of external components, enhancing equipment longevity.

You are welcome to contact Tangshan Dachuan Machinery to get more detailed info, we will supply our best service for you.

 

Processing step of drilling cuttings

The first step in separating the cuttings from the mud involves circulating the mixture of mud and cuttings over vibrating screens called shale shakers.

The liquid mud passes through the screens and is recirculated back to the mud tanks from which mud is withdrawn for pumping downhole. The drill cuttings remain on top of the shale shaker screens; the vibratory action of the shakers moves the cuttings down the screen and off the end of the shakers to a point where they can be collected and stored in a tank or pit for further treatment or management.

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Often two series of shale shakers are used. The first series (primary shakers) use coarse screens to remove only the larger cuttings. The second series (secondary shakers) use fine mesh screens to remove much smaller particles. In general, the separated drill cuttings are coated with a large quantity of drilling mud roughly equal in volume to the cuttings.

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Additional mechanical processing is often used in the mud pit system to further remove as many fine solids as possible because these particles tend to interfere with drilling performance. This mechanical equipment usually belongs to one of three types: 1) hydrocyclone-type desilters and desanders, 2) mud cleaners (hydrocyclone discharging on a fine screened shaker), and 3) rotary bowl decanting centrifuges. The separated fine solids are combined with the larger drill cuttings removed by the shale shakers.

If the solids collected by the shale shakers are still coated with so much mud that they are unsuitable for the next reuse or disposal step or if the used mud is valuable enough to collect as much of it as possible, the solids can be further treated with drying shakers utilizing high gravitational separation, vertical or horizontal rotary cuttings dryers, screw-type squeeze presses, or centrifuges. The cuttings dryers recover additional mud and produce dry, powdery cuttings.

 

How to works of drilling waste management system.

The drilling rigs use drilling mud (high density drilling fluid) to pack to drill column. The drilling mud is a mix of chemicals but there are three basic types; water based, diesel based, and synthetic oil based. The DCTLL vertical cutting dryer unit is almost always used on synthetic oil based drilling mud or diesel based mud. Synthetic oil based drilling mud is the most common type to be used in the offshore rigs.

drilling waste management

Operates use the drilling mud to pack the column so that no gas escapes during the drilling process as well as to transport the solids being removed and to lubricate the drill bit. The whole system has a fluid cycle that is run by the drilling mud pumps. The mud pumps keep a circulation flow down into the hole and back up with the solids from the drilling process.

Typical drilling applications are listed by hole size and drill rates. That info would be part of a drilling solid waste management system.

The Solid Waste Management system would almost always include 3 panel shaker screens a cuttings dryer, two mid size decanter centrifuges, and related pumps and containers. The feed from the mud pumps would go over the shaker screens and be concentrated to 50-75% solids by mass and then fed to a vertical cutting. The underflow from the unit would go to the decanter and be mixed with the underflow from the screens. A small portion of the decanter centrate is typically recycled into the unit feed to keep the material flowing and keep the screen openings flushed.

Vertical cutting dryer produced by DC Solid control

Vertical cutting dryer is one of the popular products for waste drilling cuttings. As the developing for the environment regulations,the drilling waste management has become more and more import.

Vertical Cuttings Dryer (also called verti-G Cutting Dryer) is a vertical type centrifuge that has been proven to be one of the most effective waste management equipment for oil- or synthetic- based drilling operations.

vertical cutting dryer

Working principle of vertical cutting dryer 

The Vertical Cuttings Dryer uses centrifugal force to dry drilled solids in oil or synthetic base fluids. A stainless steel screen bowl traps“wet” solids and accelerates them up 900RPM with G force up to 420. Liquid is forced through the screen bowl openings, while “dry” solids are extracted by the angled flights attached to the cone, which rotate slightly slower than the bowl. Tungsten carbide protects the flights from abrasive solids and ensures long operational life. This aids in maintaining a constant gap between the scroll and screen bowl, which is crucial for proper operation.

DC Solid controls Vertical Cuttings Dryer fixed with individual oil lubrication system with automatic alarm for pressure limit. The main motor and oil pump motor is interlocked with each other for avoiding the start of the main motor prior to the start of the oil pump motor.

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