desilter

This week GN solids control finished production of vacuum degasser and mud cleaner for clients in Middle East.


We have 3 types of degasser for oil & gas drilling industry, vacuum degasser, centrifugal degasser, mud gas separator. The mud gas separator is installed before the solids control system trip tank, to separate the hazardous gas from the drilling fluids and prevent it from kick off. The vacuum degasser and centrifugal degasser is used after shale shaker and behind desander, desilter or mud cleaner, the function is to separate the gas from the gas cut mud and protect the next process equipments like centrifugal pump, and keep the balance of the drilling fluids, their function is same, just vacuum pump is installed horizontally on the tank top, the centrifugal degasser is vertically installed in the mud tank , it can save space on the mud tank.


The mud cleaner produced by GN solids control is a combination of desander cone, desilter cone and bottom shale shaker. With different qty of hydrocylones, there are different treating capacity for option. The desander cone, desilter cone material are 100% polyurethane which is wear resistance material. The bottom shale shaker equipped with 4 panel shaker screens, with composite material frame for longer working life. Centrifugal pump #1feed the mud from degasser tank to desander cone, the clean fluids dropped into the desander compartment, the solids are separated out and drop down to bottom shale shaker, the useful fluids will be collected and the drier solids are separated out from shaker screens. Centrifugal pump #2 feed the mud from desander compartment to desilter cone, the clean fluids dropped into desilter compartment, which is clean fluids can be reused to prepare for new fluids or can be reused directly.
For more information about vacuum degasser and mud cleaner, pls contact with GN solids control.

As one of the professional manufacturer of TBM (Tunnel Boring Machine) Slurry Separation Plant in China, GN solids control recently provide standard design TBM slurry separation system with different treating capacity, normally the required slurry volume is very big, we can provide separation system with capacity of 240m3/h, 360m3/h, 500m3/h, 1000m3/h and customized design TBM slurry separation system as per our client’s requirement. Also we can provide TBM slurry dewatering decanter centrifuge if you need to get more clear water and drier discharged solids, the water can be recovered to save cost.


A basic TBM slurry separation unit including: coarse solids separation shaker, double deck shale shaker with hydrocyclones, feeding pump ( for desander cone and desilter cone), fluids collection mud tank with tank accessories.


The coarse solids shaker is used to separate the big solids, stones, sands and other big mass from the slurry and protect the equipments in the next process. The shaker screens to be used is a type of slot screen instead of woven screen, which is more wear resistance in separation of coarse solids.
The mud cleaner is a combination of desander cone, desilter cone and double deck bottom shale shaker, 2 feeding pump transfer the slurry to desander cone, desilter cone separately. The desander cone cut point is 45 microns, the desilter cone cut point is 25 microns, both of the desander cone and desilter cone are made of 100% polyurethane material. Compared with single deck bottom shale shaker, the double deck shale shaker can separate the discharged solids much drier, so that the users can collect the discharged solids easily by trucks.
The mud tank to collect the slurry will storage the slurry temporarily and after the final treatment of desilter cone, the clean fluids will be reused to keep the TBM project working well.

Recently 2 packages of triple shale shaker and 2 sets of mud cleaner are ready for shipment in our factory. The technical configuration of triple shale shaker is as below:


1) 3 units of GNZS594G-SHBF shale shaker which is equivalent with world famous model shale shaker, each shaker with 2 ea DGMS & IEC EX & ATEX approval vibration motor, each with 2.5HP power to provide high G force up to 7.5G. The shale shaker can be widely used for Suitable for Oil Based mud and cuttings, Water Based mud and cuttings, Synthetic based mud and cuttings, oily sludge. The shaker screen is durable composite material frame shaker screens with dimension 585x1165mm, the total screen area is 2.73m2.


The shale shaker is dual motion shale shaker, one is linear motion shale shaker with max 140m3/h capacity, the other one is progressive elliptical motion with max 100m3/h, there is control on the starter to change the vibration motion. The starter with Cast aluminum Control Cabinet, the electrical components are from Siemens/ Schneider/ABB brand for convenient outsourcing.
2) Triple shaker skid with 2 ways slide gate as drain port, during shipment, the 3 shakers, possem belly and skid will be disassembly to suit for the container loading.
3) Possem belly with slide gate for convenient operation
The mud cleaner with the same bottom shale shaker and same dimension shaker screens, the top hydrocyclones frame installed with 3 nos of 12 inch desander cone, 20 nos of 4 inch desilter cone with total treating capacity of drilling fluids over 1500gpm. The 20 nos of 4 inch desilter cone in 10 sets. The cone material is 100% polyurethane for longer working life.
This is special designed for our customer’s requirement, we have standard triple shale shaker and mud cleaner as GNZS594F-SHBF and GNZJ594F-3S16N if no special requirement.

Recently we have one batch of composite material frame shaker screens ready for shipment for a international drilling companies. We packed 18pcs screens at each plywood pallet, each piece screens packed by GN standard design paper box, we can also provide neutral paper box as per client’s requirement.


GN shaker screens are produced as API RP13C standard and have test report from API authorized agent in America. We can produce shaker screens from API 20 to API 325, the mesh size over API 60 all adopted 3 layers stainless steel wire mesh for better strength. The composite material frame lasts longer working life than steel frame screens, and larger effective screen area for better separation performance.


Shale shaker is the first phased cleaning equipment at solids control system, shaker screens are consumption parts of shale shaker, the user always make proper stocks for the shaker screens for convenient operation, the composite material frame screens can be storaged up to 5 years without getting rust. Based on different drilling fluids, the shaker screens working life will be different. The composite material shaker screens are repairable with plastic plug. The 3 layers 4-sides pretensioned wire mesh before heat pressing will provide enough strength. We can make customized color for the composite material frame as per client’s requirement. We adopted wedge as shaker screen locking system, the user can replace the shaker screens easily and fastly, the user can use the ratchet wrench to lock and release the wedge and take the shaker screens easily. The shaker deck angle can be adjusted by both sides simultaneously from -1ºto +5º.
When install the desander and desilter frame on top of shale shaker, the 3 in 1 mud cleaner as the second phase cleaning and the third phase cleaning equipment. The desander cone and desilter cone are 100% PU wear-resistant material.

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.