Month: June 2019

This week one batch of big bow decanter centrifuge and shale shakers are ready for shipment to USA. The models and configuration is as below:

1. Big bowl decanter centrifuge: The decanter centrifuge is used to separate the fine solids from the drilling fluids after shale shaker. The shale shaker with good performance can reduce the solids content effectively and protect the centrifuge screw from damaged by the big solids. GN solids control can produce decanter centrifuge from 9 inch bowl to 30 inch bowl, the mini centrifuge with 9 inch bowl diameter is mainly used for mining and waste water treatment, also it can be used in compact oil sludge treatment unit, the 14 inch bowl decanter centrifuge is the most popular model decanter centrifuge for solids control, drilling waste management system, oil sludge treatment unit and dewatering unit. The 18 inch bowl, 22 inch bowl decanter centrifuge is the big bowl decanter centrifuge can be used for solids control, drilling waste management system, oil sludge treatment unit and dewatering unit and slurry separation. The 30 inch bowl decanter centrifuge is the biggest bowl decanter centrifuge we produced now, it can be used for Tunneling and other construction work which need big volume slurry.
2. Linear motion shale shaker: The linear motion shale shaker is to separate the coarse solids from the drilling fluids, the user can use different API mesh size shaker screens to separate different solids size.GN shaker screens are produced comply with API RP13C standard and have been approved by the API authorized lab. The composite material frame shaker screen with longer working life, better conductance, better separation performance, better storage life, not only for our own shale shaker, we also produce the replacement shaker screens for world famous brand shale shaker with competitive price and good quality.

Recently one set of mud recycling system is ready for shipment, this is for China client. The technical configuration is as below:

1) Separation equipment: one unit of shale shaker and one unit of desander, the shale shaker is to separate the coarse solids from the slurry, the clean fluids dropped down to the shale shaker, one set of slurry pump feed the slurry to the 10 inch desander cone to separate the solids cut point 45 microns, the clean fluids drop into the compartment under the desander, the underflow shale shaker can separate the solids drier and reduce the waste solids volume. The client can collect the dry solids easily by cuttings box or waste bag. The linear motion shale shaker with 3pcs screen panels with composite material frame shaker screens, the desander cone material is outter steel for better strength, and inner material is PU material for abrasion resistence. The vibration motor is Italy Oli brand vibrator, and the shaker screens for the shale shaker and underflow shaker is with same size for easier stock.

2) Customized Mud tank with all the accessories and mud agitator, mud gun to agitate the slurry. We can design customized mud tank for different applications.
3) Pump package including mixing pump, trip pump, centrifugal pump on the oilfield skid for convenient movement. The vertical submersible slurry pump is installed to feed the slurry to the desander cone to save space on the mud tank.
The centrifugal pump is interchangeable with world famous brand centrifugal pump, including all the parts, the major wear parts for pump casing and impeller is made of hard ductile iron alloy for better abrasion resistance.
We produce mud recycling system for HDD, CBM, slurry separation and mining tailings treatment, also we produce mud cleaning system for oil and gas drilling. We also provide solution for any waste treatment.

Recently we finished production of one set of solids control system to India, including shaker tank and decanter centrifuge tank system. This is a 5 phase separation mud tank system for 1500HP oil drilling rig. The working principal is as below:

1） 3 units of shale shaker as the first phase cleaning to separate the big solids bigger than 100 microns from the drilling fluids, it can be used for both water based mud and oil based mud or synthetic oil based mud. The shaker screen installed on the shale shaker is composite material frame shaker screens comply with API RP13C.

The possem belly is installed behind the 3 units of shale shaker as drilling fluids distribution box and collect the drilling fluids from the mud gas separator or from the elevated manifold directly.
2) desander cone is the second phase cleaning to separate the cut point below 45 microns. The fluids with solids below 45 microns will drop into the mud tank compartment. The 2# centrifugal pump suck the drilling fluids from this compartment and feed to 4 inch desilter cone.
3) desilter cone is the third phase cleaning to separate the cut point below 25 microns the fluids below 25 microns will drop into the desilter compartment and the submersible slurry pump will suck the mud from this compartment and feed to GNLW452C decanter centrifuge.

4) middle speed decanter centrifuge is the fourth phase cleaning to separate the cut point 5~7 microns for barite recovery.
5) high speed decanter centrifuge is the fifth phase cleaning to separate the solids 2~5 microns for high gravity solids, especially when the drilling fluids has been reused for several years, the fine solids is accumulated a lot and it can not be reused again, then the high speed decanter centrifuge is required to lower the solids content.

2 more construction slurry cleaning system for vacuum tanker vehicle is ready for shipment to USA, this is the client’s repeat order. After use the previous 2 system at their work site successfully, they repeat the order for another 4 units, this is part of their new order. They have given some good suggestions to improve the system efficiency and to be user friendly.
The basic working principal is as below:

The slurry collection hopper collect the construction slurry from vacuum tanker vehicle, this is special designed slurry collection hopper — a large open top hopper with 3-side weir surrounded, 1 side is low weir for slurry feeding from the vacuum tanker vehicle. The coarse solids separation shale shaker is sitting on it, the separated coarse solids/stones are collected by cuttings box, the clean slurry is dropped into the collection hopper and feed to the fine solids separation shale shaker by the submersible slurry pump. The fine mesh screen is installed on the fine solids separation shale shaker with composite material frame shaker screens for longer working life. GN can produce composite material shaker screens comply with API RP13C from API 20 to API 325. The slurry discharged shale shaker is feed to mud cleaner with desilter cone, the separation cut point is 25 microns by centrifugal pump, the discharged solids is drying by the bottom shaker screens.

The clean slurry is feed to high speed decanter centrifuge by working with dewatering unit by the screw pump, we have different size decanter centrifuge with different treating capacity for option, the bowl size with 9 inch, 14 inch, 18 inch, 22 inch, 30 inch. To get much pure water, sometimes chemical should be add to improve the separation efficiency.
If you have similar project, welcome to contact with GN sales engineer.