Month: October 2023

With the increase in the difficulty of oil drilling development, more and more oil-based mud will be used in drilling, but during the use of oil-based mud, oily drill cuttings will be generated, which will cause great harm to the environment. And most countries in the world have strict limitations on the discharge of oily drill cuttings. Depending on the region and country, the oil content requirements for drill cuttings after treatment are different, usually less than 5%, and many developed countries and regions require even lower OOC oil content. as a waste treatment solution, The GN Solids Control drill cuttings dryer usually reduces the oil content of drill cuttings to 3-5%.

After GN Solids Control drill cuttings drying system treatment, the total amount of waste drill cuttings can be reduced, and the useful drilling fluid can be recovered for continued drilling. The solid phase material discharged can be sent to a hazardous waste treatment plant for further pyrolysis or biodegradation detoxification.

 

The role of the oil-based drill cuttings dryer and centrifuge system is to reduce the volume of drilling waste, recover useful drilling fluid, reduce transportation costs and post-processing costs. Its main configuration is as follows:

1. GN Solids Control vertical cuttings dryer GNCD930G

The drill cuttings dryer uses the centrifugal force generated by mechanical rotation to separate solid-liquid mixtures. It can recover the liquid phase in the drill cuttings. The drill cuttings enter through the feed port and enter the space between the screen basket and the screw through the distributor plate. The drill cuttings dryer rotates at up to 900RPM with a separation factor of 420G. Under the centrifugal force, the liquid phase and small particles (centrifugal fluid) pass through the material layer, pass through the screen basket, and flow along the upper cover into the liquid collection trough at the upper part of the machine base, then is discharged out of the machine through the liquid discharge pipe located on both sides of the machine base; the solid part of the drill cuttings remains inside the screen basket. Because there is a speed difference between the rotor scraper and the screen basket, the rotor scraper scrapes the drill cuttings off the screen basket and pushes them to the bottom of the screen basket, thereby discharging the dehydrated drill cuttings into the receiving funnel below the machine or the bottom screw conveyor. This dehydrating process is carried out continuously and can be used for sustainable work. It can be applied for real-time treatment.

2. Decanter centrifuge GNLW363D-VFD

The decanter centrifuge GNLW363D-VFD can further treat the liquid phase separated by the drill cuttings dryer to reduce the density, so that the oil-based mud can be reused. GN Solids Control centrifuges are precision-machined using CNC equipment, with high machining accuracy and good consistency. All major rotating parts are processed by high-precision CNC equipment, and the centrifuges are balanced three times, including the main rotating component 1800RPM medium-speed dynamic balance, screw rotor actual working speed high-speed dynamic balance, and overall dynamic balance, to ensure stable operation of the centrifuge under high-speed conditions.

If you have any questions about drilling mud non-landing (water-based and oil-based), please feel free to call GN Solids Control.

Recently, GN Solids Control provided a set of oil drilling mud control systems for Indian customers, including double-deck vibrating screens, vacuum degassers, desilters, centrifuges, slurry pumps and mud tanks.

1. Double-deck shale shaker

Linear motion track, using Oli motor, screen box can be adjusted simultaneously, screen box angle adjustment can be performed without stopping. Different mesh screens are used on the upper and lower decks, separation is more precise, processing capacity is large, and it is widely used in large-scale oil and gas drilling mud control systems.

2. Vacuum degasser

GN Solids Control’s vacuum degasser comes in three models, including GNZCQ240B, processing capacity 240m³/h; GNZCQ270B, processing capacity 270m³/h; GNZCQ360B, processing capacity 360m³/h, to meet the requirements of different processing capacities. The vacuum degasser is mainly used to separate small bubbles in the drilling mud, and then sent to the desilter or desander. A vacuum degasser designed to meet the requirements for use on offshore platforms in China is also available.

3. Desilter

The desilter is mainly composed of two 10-inch desilter cyclones, which can separate solid particles larger than 40-60 µm.

 

4. Desander

The desander is mainly composed of 12 10-inch desander cyclones, which can separate solid particles larger than 20-40 µm.

5. Centrifuge

GN Solids Control drilling fluid centrifuges come in multiple sizes to choose from, including 14 inches, 18 inches and 22 inches. GN Solids Control drilling fluid centrifuges are designed and manufactured by API-certified factory, and are widely used worldwide. The GNLW363D horizontal screw centrifuge provided is one of the best-selling centrifuges in GN, and has sold more than units. Conventional mud control systems are equipped with two centrifuges, a medium-speed centrifuge and a high-speed centrifuge, while GN Solids Control’s GNLW363D centrifuge is a typical high-speed centrifuge with good treatment effect and economic benefits, and is popular with customers.

6. Centrifugal pump

 GN Solids Control centrifugal pump components can be replaced with Mishen sand pump components. To extend the service life of the centrifugal sand pump, GN Solids Control centrifugal pump uses nodular cast iron alloy as the pump housing, which has high wear resistance. The impeller of the centrifugal sand pump also uses this material, and high-quality mechanical seals are used to prevent leakage of the centrifugal pump.