Month: February 2022

As the crude oil price is increasing stably, the numbers of active drilling rigs is on a rise, too. Among which, quite a lot are offshore rigs working on offshore platforms. Under the oceans, the crude oil reservation is remarkable, and lots of oil companies are joining to the offshore drilling industry. In order to take into consideration of environment protection purpose while drilling, the drilling mud shall be treated in time and to leave the waste to the least.
GN Solids Control has been providing offshore drilling companies for years with the high quality and compact designed mud recycling system. Here is information of a recent project:

1. In this project, the main equipment is shale shaker. Shale shakers are most important for a drilling mud system, which remove most solids particles from the recycled drilling mud. GN has different models of shale shakers, from the mini shale shaker with 2 pcs of screens to the double deck shale shaker with 2 layers holding 6 pcs of shaker screens. Each shale shaker is equipped with 2 vibrating motors, with total power less than 4kw. And the feeding for shale shaker is easy cause the mud flows directly from drilling. There is even no need for an extra pump.

2. Mud tanks are another main component for this system. They are used to receive the clean mud for next cycling. By using the jet mud mixer along with the tanks, the new chemicals can be added into the mud system.
It is clear that there are no desander or desilter cones in this system, for one thing, comparing with shale shakers, the desanding or desilter cyclones are less efficient. For the other, both desander and desilter cones need large power centrifugal pumps for feeding.

In this case, the client can collect the drilling solids waste to a vertical cuttings dryer or decanter centrifuge for drying before discharge. And also the drilling fluids can be retreated by decanter centrifuge when there are fine particles in the fluids after several cycles.

For more information, welcome to contact GN directly.

Normally, GN Solids Control recommends 4 stage separation systems for TBM or pipe jacking projects for a thorough treatment of drilling mud. In some cases, based on clients’ customized requests, GN Solids Control can also make 2 or 3 stages separation units in a compact design. For example, the GNMS-500D and GNMS-1000D are both quite popular products during the years. And recently, GN just delivered several sets of GNMS-1500D to some clients in Asia.

1. GNMS-1500D Mud Recycling System is designed and manufactured according to the needs and requirements from customer, which is appropriate for mud treating & recycling in mining industry, piling works, HDD(horizontal directional drilling) and so on.

2. The treatment capacity of this system is up to 360m³/h. This system includes 2 stages of solids control and separation. The first-stage separation is the shale shaker part of double deck shale shaker & desander.

3. The second-stage separation is the desander part of shale shaker & desander fed by a large powered centrifugal pump. Centrifugal pump gives enough power to the desander cyclones and mud is separated into liquid and solids by centrifugal force inside the cyclones.

4. Inside the catch tank, there is a device to prevent dry-run of the centrifugal pump, for mud compensation and preparation.

Function of GNMS-1500D:

During drilling, the drilling mud contains lots of sand and silt. This recycled mud is transferred to GNMS-1500D’s inlet pipe and solids phase larger than 40μm are removed by the mud recycling system. In this way, clean drilling mud is returned to the rig/pipe jacking machine.

If you or your clients have similar projects, or if you or your clients need more information from GN professional team, welcome to consult from GN freely. GN Solids Control is located only 40 km from Beijing, the capital of China. And GN has branch companies in Houston, TX, USA and also in Moscow, Russia.

TBM Projects are very common during any countries’ infrastructure building. And the mud recycling systems are always requested during TBM projects. Similar as all other drillings, there is drilling media to be invited into drilling procedures, and the drilling media, which is also called drilling mud should to be recycled after work and to be returned to drilling after being separated by a mud recycling system.

Here are some of the functions of such a mud recycling system for TBM:

1. Such a mud recycling system can provide high-quality bentonite slurry required by shield tunneling construction to the closed chamber of the excavation face of work.

2. An efficient mud recycling system can make the specific gravity, viscosity and other technical indexes of the slurry in order to meet the requirements of forming mud film and stabilizing the excavation surface in the highly permeable sand layer.

3. A mud recycling system for TBM can help to transport the mixed mud formed by cutting soil and sand to the ground for separation and treatment, and then adjust and utilize the recovered mud.

4. The mud recycling system is used to support, stability and excavation surface soil. The shield tunnel face produces drilling mud balance effect with the help of mud pressure and the front earth pressure to effectively support the front soil.

5. The mud recycling system can also cool and lubricate cutting equipment such as cutter head and cutter head. It is kind of protection.

6. According to the different requirements of soil permeability coefficient, reasonably match the grade of mud particles.

GN Solids Control has been providing mud recycling systems for TBM contractors and projects for more than 15 years, and has gained rich experiences in designing and manufacturing. Among GN products, there are compact systems with 2 separating steps and complete systems with 3 separating steps. GN engineers can give more suitable suggestion based on your detailed information.