May 21

As GN drilling waste management system is working well for Russia clients, this is the fourth containerized type drilling cuttings management system sent to Russia oil Service Company. Big Clients from Russia always prefer this containerized design that could make all equipment indoor, to avoid the cold surroundings and ensure the machinery running smoothly in cold weather. Operator could run the equipment inside, and this standard container type is also convenient for transportation by sea.

160520 Waste Management

Vertical cuttings dryer is one of the important equipment for waste cuttings management system. The waste slurry can be separated into much dryer solid discharges and recover liquid after treatment of cuttings dryer. The cuttings dryer unit in this project is 4th generation model dryer with normal RPM of 900, equipped with air knife system and flushing system for cleaning of screen and liquid discharge ring during equipment running. This can also be used to avoid block inside the cuttings dryer.160520 Vertical DryerVacuum cuttings pump is used to transfer the waste material into the vertical cuttings dryer. The advantage of using the Vacuum cuttings pump is less limitation to locate it and this type pump works very well for high density waste transportation. As backup, we also provide one set screw conveyor for feeding the cuttings dryer in case the cuttings pump not fit for some special cuttings. Another set Screw conveyor is also provided to install under the dryer unit to transfer the solid discharges out to the container.

After treatment of cuttings dryer, the recovered fluids need to go to centrifuge for further treatment. The high speed Decanter centrifuge with bowl speed up to 3200RPM separation points can be about 5-10microns. Centrifuge can separate much fine solids with bowl speed range 2700RPM to 3200RPM. We match variable speed VFD control panel for easier operation. With PLC touch screen, the operator can adjust the centrifuge bowl speed, differential speed and pump feed speed very easily.

Additional, there is waste cuttings skip to collect the cuttings coming from the conveyor. This cuttings skips is also design and made by GN Solids Control with cover for hazardous material further transportation.

160520-Container-Cuttings-Dryer

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Apr 11

Drill cuttings are separated by shale shaker, decander, desiler, decanter centrifuge, and collected by screw conveyor or vacuum unit , for further separation of vertical cutting dryer & decanter centrifuge.

drill cuttings separation

drill cuttings separation

In an ideal situation, all drill solids are removed from a drilling fluid by solids control equipment on a drilling operation. The two primary sources of solids are chemical additives and formation drill cuttings. Drill cuttings are contaminants that degrade the performance of the drilling fluid. If the drill cuttings are not separated, they will be ground into smaller and smaller particles that become more difficult to remove from the drilling fluid.

Most formation solids can be removed by mechanical means at the surface. Small particles are more difficult to remove and have a greater effect on drilling fluid properties than large particles. The particle size of drilled solids incorporated into drilling fluid can range from 1 to 250 microns (1 micron equals 1/25, 400 of an inch of 1/1000 of a millimetre).

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Dec 12

The landfills are low-cost and low-technology, so until now, it is the most popular method for drilling waste disposalin developing companies, who do not have much concern about environment.

drilling waste management equipments

drilling waste management equipments

1 Landfill

After drilling waste are maximum recovered and the certain level for oil, salt, metals or industrial chemicals can reach the disposal standard set up by environment Department, it can be landfill disposal. Even with low-concentration levels, pits must be structurally sound and isolated from groundwater sources, so that it can not be thread of groundwater supplies.

Waste with slightly higher concentrations can be blended with clean soil to meet acceptable levels. Pits can be located within plant rooting zones, but cannot intersect with ground water tables. If waste exhibits toxic concentrations, disposal can only occur in specially engineered and legally permitted landfills (on-site or off-site)

2 Drilling waste management

Only when the drilling waste is maximum recycled and treatment and reach the certain level, it can be landfill. GN solids control worked together with drilling waste management service companies, we provide equipments to support the service company to do the drilling waste disposal service.GN Vertical cutting dryer can make the drill cutting dryer and oil content in the cuttings is lower than 5%, then the water can be chemical treatment and the cuttings can be landfill or others.

Although there are a lot of methods for drilling waste disposal, the core solution is to reduce the drilling waste and maximum recycling them. A proper solids control system can minimize the drill cuttings and recycle more useful drilling fluids, a good drilling waste management system can recycle more cleaning drilling fluids from the cuttings, both of them can less the drilling waste disposal. GN provide both solids control & waste management solution, you need further process for the drilling waste disposal.

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Oct 26

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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Aug 02

The Drill cuttings Management solution is designed to help maximize compliance with the waste management hierarchy principles, as well as ensuring that local regulations and standards are complied with. Ultimately, disposal will be required in all cases, be it solids and / or liquids.

drill cutting management solution

drill cutting management solution

Drill cuttings management solution usually including but not limit to:

1 collection of drill cuttings

There are various ways to collect the drill cuttings from the solids control system( shale shaker, mud cleaner, decanter centrifuge). Firstly you need a cuttings blowing pump to blow the drill cuttings and waste produced by centrifuge from a collection place in the site to a drill waste storage tank or directly to a transferred truck or boat, they called it ”bulk tank”. Then Screw conveyors are used to transport drill cuttings and centrifuge waste from one location on the rig to another, probably to a vertical cutting dryer in the drilling waste management system.

2 Storage of drill cuttings

A Drilling Waste Container is to storage drill cutting, centrifuge waste and pit cleaning wastes generated during drilling operations. The drilling waste containers are typically transported to a treatment and disposal site for further processing.

After the drilling waste is treated by vertical cutting dryer, the cuttings will be collected by a small waste container and be transported to other place, the fluids are pumped to high speed decanter centrifuge for further process.

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Mar 31

When water-based muds (WBMs) were used, only limited environmental harm was likely to occur, but when operators employed oil-based muds (OBMs) on deeper sections of wells, the resulting cuttings piles created impaired zones beneath and adjacent to the platforms. So it is necessary to process drilling waste by GN drilling waste management system.

offshore drilling waste manaegement

offshore drilling waste manaegement

Many offshore rigs do not process the drilling waste or even drilling mud at site, because there are professional facilities who can recycle the drilling mud and process the drilling waste. Then the rig can re-use the recycled drilling mud. Unlike onshore drilling rigs, there are complete solids control systems in onshore drilling site.

The drilling waste produced by onshore drilling are mainly drilling cuttings and less water, which can be transferred by screw conveyor to hi-G shaker or vertical cutting dryer for further process.

The drilling waste produced by offshore drilling usually is not produced by solids control equipments, they are collected by containers then transport to the drilling waste management facilities for process. Firstly they are pumped to shale shaker( drying shaker), then desander, desilter cone, the clean fluids can be processed by decanter centrifuge directly. The cuttings are transferred to vertical cutting dryer, then to decanter centrifuge, the clean fluids are collected and re-used in offshore drilling rig.

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Jul 01

GN solids control is in a process of design and manufacture vertical cutting dryer, we will get it into production in several months.

drilling cutting management

drilling cutting management

The first step in managing drilling wastes is to separate the solid cuttings from the liquid drilling mud. Once solid and liquid drilling wastes have been separated, companies can use a variety of technologies and practices to manage the wastes. For some applications, drilling wastes are solidified or stabilized prior to their ultimate management practice. The management technologies and practices can be grouped into three major categories: waste minimization, recycle/reuse, and disposal.

GN solids control equipments can make the first step of solids control, to clean the drilling mud and reuse for drilling rig.

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.

Our equipments can do a series job for drilling cuttings management, firstly we use high G shaker to dry the drilling cuttings and recycle a small part of the drilling fluids for re-use. Most of the drilling cuttings are dried and transferred to vertical cutting dryer by screw conveyor. The dry the drilling cutting is, the better performance can reach by the cutting dryer.

After processed by vertical cutting dryer, the large solids are separated out, and sent to Cement Plant or brickyard or used for construction industry. The separated fluids are pumped by screw pump to a high speed centrifuge for further process. Finally the clean mud can be re-used for drilling rig or re-used to make new mud.

Following is the ways can reuse the drilling waste.

drilling waste management

drilling waste management

 l  Recycling Muds

l  Roadspreading

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May 20

GN solids control exported several sets of drilling mud system to Amazon region, including Ecuador. We can produce the complete drilling mud separation system, including shale shaker, vacuum degasser, desander, desilter, decanter centrifuge, vertical cutting dryer, mud tank, etc.

 Ecuador produces more oil than it needs for domestic consumption and thus it is one of the country’s leading exports. Therefore, any new drilling for oil is not intended to meet local demand but is intended for export overseas, most likely to Japan and the United States.

drilling mud separation system

drilling mud separation system

Drilling mud is used to control subsurface pressures, lubricate the drill bit, stabilize the well bore, and carry the cuttings to the surface, among other functions. Mud is pumped from the surface through the hollow drill string, exits through nozzles in the drill bit, and returns to the surface through the annular space between the drill string and the walls of the hole.

Drilling mud separation system

As the drill bit grinds rocks into drill cuttings, these cuttings become entrained in the mud flow and are carried to the surface. In order to return the mud to the recirculating mud system and to make the solids easier to handle, the solids must be separated from the mud. The first step in separating the cuttings from the mud involves circulating the mixture of mud and cuttings over 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.

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Apr 22

GN solids control can design and manufacture the complete line of drilling waste management system, including shale shaker, high G dryer, vertical cutting dryer, decanter centrifuge, screw pump, etc equipments.

The first step for drilling waste management is to separate the solids cutting from the liquid drilling mud. Once solid and liquid drilling waste have been separated, companies can use a variety of technologies and practices to manage the wastes. For some applications, drilling wastes are solidified or stabilized prior to their ultimate management practice. The management technologies and practices can be grouped into three major categories: waste minimization, recycle/reuse, and disposal.

drilling waste management centrifuge

drilling waste management centrifuge

Function of waste minimization

 It can reduce volume or impacts of waste, including the following two aspects.

1 minimize generation of drilling waste

2 use mud and additives with lower environmental impacts

Function of recycle/reuse

 1 recycling mud

 2 roadspreading

 3 reuse of cutting for construction purpose

 4 restoration of wetlands using cuttings

 5 use of Oily cutting as fuel

 How to disposal?

 1 discharge to Ocean

 2 slurry injection

 3 onsite burial (pits,landfills)

Drilling waste management decanter centrifuge

GN solids control can produce 3 models decanter centrifuge for drilling waste management system.

1 Middle speed centrifuge LWF450x1000N

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