Month: March 2022

Based on clients’ requests, GN Solids Control has designed a series of mud recycling unit with small footprint and practical performance. On a one skid equipment, there is a double deck shaker with cyclones for 2 steps separation, and a catch tank in between the 2 separating processes. A centrifugal pump is located on side of catch tank for transferring mud from catch tank to the cyclones on top of shaker.

Here are some questions frequently asked for such a mud recycling system:
1. How to choose a suitable generator for the mud recycling system?
First, the total power of the mud recycling system shall be take into consideration, which include the vibrating motors of the double deck shaker and the centrifugal pump motor. Also, if necessary, the feeding pump for the whole mud recycling system should be included, too. For example, for a GNMS-200D unit, the total power is 14kw, and if operator uses a 7.5kw feeding pump, the operator should prepare a 48KVA generator.

2. What’s the cutting point of such a mud unit?
The mud unit’s cutting point is determined by the 2nd step separation equipment, the cyclone. For example, the 10 inch cyclone’s smallest cutting point is 38 microns, while the 4 inch cyclones’ is 25 microns. They are the most frequently used cyclone sizes.
But it doesn’t mean all particles above the smallest cutting point will be removed. Take the GNMS-200D with 4 inch cyclones as example, its cutting point should be a range covering 20 to 50 microns. In practice, at a suitable treating capacity, the particles above 25 microns could be removed. Or we can state as ” after treated by 4 inch cyclones, the solids particles in mud are smaller than 20 -50 microns.

For more information, welcome to contact GN team directly.

Liquid mud plant is also called LMP, which is used for preparing, storage and treatment of the drilling mud. In a complete liquid mud plant, there should be 3 mainly drilling mud tanks for different purpose:

1. Mixing Tank.

Mixing tanks are always cuboid shaped mud tanks equipped by mud mixing hoppers. Those hoppers are always Venturi hoppers linked to centrifugal pumps. When pump is sucking mud from one compartment to another, and when mud is passing the Venturi hopper, there will be a sucking force to suck in the chemicals from the hopper.
Mixing tanks have mud agitators and mud guns, too, for stirring up the mud in order to prevent settling down. Meanwhile, there are also pumps for transferring the prepared mud from mixing tank to others.

2. Treating tanks.

When used mud is delivered to the liquid mud plant, the dirty mud shall be treated by separation equipment in order to remove the particles and to be returned to the storage tanks. The separation equipment are mainly shale shakers and decanter centrifuges, and when there are extra fine particles, there should be chemical dosing for flocculating.

3. Storage tanks.

Storage tanks are not complicated in pipelines and always using single guardrails. There are no divided compartments inside a storage tank and the most commonly used equipment are mud agitators and mud guns. Both mud agitators and mud guns are used continuously for stirring the drilling mud from being settled down to the tank bottom. Clean mud will be safely storage in those tanks.

GN Solids Control has 2 kinds of storage tanks available, the cuboid shaped ones and the cylinderic ones, each type has its own advantages.

If you have such project or tender, welcome to contact GN team for consultancy or quotation.

In a drilling rig solids control system, there are at least 3 steps for separation, the shale shaker, the desander cones and desilter cones. And there is a machine as a combination of desander and desilter, which is called a mud cleaner. Comparing with such designs as a single desander plus a single desilter, the mud cleaner occupies a much smaller footprint. Meanwhile, by sharing one drying shaker, the mud cleaner is less power consumable.

Just 2 weeks ago, GN Solids Control has provided to a drilling company in China with 3 sets of mud cleaners, with same model GNZJ594F-3S16N. Each mud cleaner of this model can serve a 1500GPM treating capacity, which is suitable for a large horsepower drilling rig. So the totally 3 mud cleaners are quite probably to be allocated to 3 drilling solids control systems.

Main Specifications of GNZJ594F-3S16N:

1. GNZJ594F: it is a shaker model among GN shale shakers, it is equipped by 2 vibrating motors each of 1.72kw power. The shaker is equipped by 4 pieces of shaker screens, with a total screen area of 2.73 square meters. The shaker deck is quite strong and uses good sealing in order to prevent leakage. The shaker deck angle can be adjusted during operating for achieving a good performance.

2. Shaker screens. The shaker screens on the shale shakers are made by GN Solids Control, too. GN shale shakers are fully in compliance with API RP 13C, with same screen dimension, the non-blanked area and conductance are both comparably larger.

3. Desander and desilters. GN chooses polyurethane desander and desilter cyclones for longer service life. Desander cyclones are of 10 inch diameter for the 40 microns cutting point, and desilter cyclones are of 4 inch diameter for 20 micron cutting point.

For different jobsite conditions, GN has other optional mud cleaner models. Please contact GN sales team for more information.

As leading manufacturer for drilling mud solids control and drilling sludge treatment equipment and a professional solution provider, GN Solids Control has designed and put into reality a complete system for both mud recovery and slurry treatment which is suitable for for mud preparation, mud recovery and clarification, mud weight control, mud storage until slurry treatment in horizontal drilling and pipe jacking industries. This system is combined by following components:

1. Mud tanks: This systme is equipped by several mud tank skids with effective tank volume≥25m³. They are suitable for transportatiaon inside containers and being lifted at jobsite.

2. Shale shakers. A single shale shaker’s designed capacity is larger than 120m³/h, with vibrating motors with total power 3.44KW. Each system has 2 or 3 shale shakers depended by the requested capacity. The shakers are well sealed and easy for changing screens and spare parts. During transportation, the shakers are to be removed from tank and to be shipped inside container.

3. Mud cleaner: Mud cleaner is a combination of both desander and desilter. The capacity of desander and desilter are in complianc with the total system’s request and achieved by certain quantity of cyclones. Both desander and desilter share the same drying screen on below, with screen area of 2.63 square meters. Total power 3.44kw.
4. Decanter centrifuge: there is a big bowl decanter centrifuge located after the desilter cones. The cutting point of decanter centrifuge is 2 to 5 microns, which is suitable for remove the fine particles from the drilling mud. In this system, there are big bowl centrifuges adopted, with 18 or 22 inch bowl diameter.

5. Chemical dosing system: in case there are extra fine particles in the drilling mud, we have to invite a chemical dosing system with polymer injected into the drilling fluids in order to flocculate the extra particles to be within the centrifuge’s treating range. The chemical dosing system is designed inside a 20 ft container for easy transportation and layout.

6. Jet mud mixing unit: a jet mud mixing unit is used in this system for prepare new mud by adding drilling chemicals into the clarified driling mud.

Welcome to consult with GN team for more information.