Jan 13

Mud system will not work if there are no mud tanks. In the mud recycling system, the tanks are used to store the drilling mud to be a base where the solids control equipment to be installed. Normally, more than one mud tanks
will be used in the oil drilling mud system. For different purpose, the design of the mud tank is different, especially the inner structure of the mud tanks.
There are mainly 3 types of mud tanks recycling tank, intermediate tank and premixing tank. Then what are the different among these 3 types of mud tank?
The recycling tank is where to install the primary shakers and degasser unit, and also the de-sanding and de-silting unit. Each of equipment needs a compartment in the mud tank. As the recycled drilling mud is treated by the solids control equipment one by one. After treatment by each of the equipment, the drilling fluids will be cleaner than before. Thus the drilling fluids cannot be mixed. The wall between two compartments always has an overflow port for balance of the drilling mud in the tank.

Mud-Tank-for-ZJ-50

Mud Tank System

For the tank to install the de-sander and de-silter unit, inner structure of the mud tank would be much complex as there are pipes for centrifugal pump to such the drilling fluids from inside of the tank and transfer to the cyclone for further treatment. Operator has to know which pipe is for de-sander and which pipe is the desilter.
On the mud tanks for installing the solids control equipment on, there always have the walkways and handrails. The walkways provide enough space for the operator to walk around the equipment for operation and maintenance. Intermediate tank is a type buffering tank, part of this tank is for mud recycling, and other parts are used for mud storage. Operators can easily tell how many compartment in this tank.
The premixing tank is used to mix drilling fluids. It always is connected with the jet mixer unit. The mixing pumps suck liquid from mud tank and send liquid back again with added mud materials from the hopper. Thus the pump should be able to suck the drilling mud from anywhere in the mud tank used for mixing and storage.
Therefore, in the mixing tank, there are two groups of pipelines, one for sucking, and the other one is for sending liquid back. Mug agitators and mud guns are always installed on the mixing tank.
Though, the inner structure of the above tanks is different, the outer dimension and design are always the same for purpose of easy transportation and assembling.

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Nov 19

Normally, the drilling mud recycling system is consisting of mud recycling tank skid and mud mixing tank skid. On
the mud recycling tank skid, the solids control equipment like shakers, mud cleaner, and even decanter centrifuge unit will be installed for removing the cuttings and useless solid particles in the drilling fluids. After several times recycling, the useful mud materials will loss together with the cuttings, and then the mud engineer need add new mud materials into the drilling fluids to maintain the proper mud property for the drilling job. The mud mixing unit is the equipment used for adding the mud materials into the fluids.

gn-mud-mixer-unit-1

Mud Mixing Hopper

What is the Function and Principle of the Mud Mixing Unit
The mud mixing unit is always installed at end of the mixing tank. Before starting the drilling, the driller need have sufficient drilling mud to keep a continuous drilling. Thus at the first, the mud mixing unit is used to make the drilling mud by mixing clean water and mud materials. With the drilling going on, once the mud property is not proper for the drilling process, new mud materials like barite or other polymers need to be added into the drilling fluids. The mud mixing unit is sucking the drilling mud from the mixing tank, and then pump the mud together with materials back again into the mixing tank. Normally, the mud agitators would be equipped on the mixing tank for fully blending.

What Components are Included in the Mud Mixing Unit
1. Centrifugal Pump – the inlet of the pump is connected with the mixing tank for sucking the drilling mud from tank. And the outlet is connecting with pipe manifold that will transfer the mud to the hopper unit. As this pump is fixed with the mixing hopper, it is also called mixing pump. This pump is driven by an electric motor via direct shaft connection. By higher efficiency shearing purpose, GN will used belt driving for a shearing pump.

gn-mud-mixer-unit-2

Mixing Hopper Bag Breaker

2. Mud Hopper – GN’s mud hopper is Ventri type connected with the pipe manifold via a T pipe. The mud materials will be added into the hopper and then immediately sucked into the drilling fluids as there is a vacuum produced by the high speed flow. For the hopper, GN uses the material of stainless steel for better anti corrosion performance and long life time. Inside the hopper, there is a bad beaker for quickly adding of powders. On the pipe manifold, there is a pressure gauge for the operator to inspect the working pressure of the mixing pump.
3. Control Panel – GN’s mud mixing unit is equipped with explosion proof control panel for application in Zone 1. The operation of the control is easy for only three buttons on the panel. One on, one off and one for emergency stop, accordingly, the signal lights is installed to reflect the operation.

GN’s mud mixing unit could be installed both at the end of the mixing tank or separately mounted on a small skid. This mud mixing unit can also be designed as a dual hopper dual pump type for larger capacity or in case one of them is broken down.

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Jun 17

Mud Agitator is one of the solids control equipment that is mainly used to mix the drilling fluids in the mud tanks to keep the solids inside the drilling fluids suspending other than sedimentation down to the tank bottom.
GN’s sales team ever received many inquiries on the mud agitators; unfortunately, most of the clients have no idea on how to choose the right model for their project and even don’t know how to use the equipment properly to ensure a longer life time.

gn-mud-agitator

Drilling Mud Agitator

GN’s sales are good at understanding clients’ specific request by asking few simple questions. With the answer from the clients, GN always could give the best proposal for clients. Now let’s see what these questions are and what information GN need to give a proposal.
a. What is the inside dimension of the mud tank or pit. From this question, GN will know the inside length, width and depth of the mud tank, and then GN will know how long the agitator shaft should be suggested for clients and how big impeller should be used. For the deep mud tank or pit, the stabilizer will be provided to hold the agitator shaft for stable performance.
b. What is the shape of the mud tank, cylinder or rectangular? Then GN will know how to design the agitator.
c. What is the electric specification, mainly GN would like to know the jobsite electric voltage and frequency. Different countries may have different frequency, the 50 Hz motor cannot be used under 60 Hz, and safety is ever the first think we should keep in mind.
d. What is the S.G. of the liquid? For very thick liquid, GN will propose bigger horse power motor to drive the agitator.
Mud agitator is always installed in mixing tank with jet mixing unit, active mud reserve tank and trip tank. For some clients who get the mud agitators from GN and make the mud tank by themselves, GN always recommends them to make the mud tank with same dimension, thus they can get the agitator all same model, which would be much better for clients’ future maintenance. GN suggest the RPM setting of the mud agitator between 40-96, too high will disturb the solids suspending, while too low will lead to solids sedimentation.

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Jun 03

Centrifugal pump is widely used on oilfield for the drilling mud transferring in solids control system. Even in the same mud system, the centrifugal pump could be used for different application.

Centrifugal pump used as transferring pump for the cyclone unit

De-sander and de-silter are very traditional solids control equipment. They are located after the shale shakers and fed by pump unit to remove the solid particles in the drilling fluids. Centrifugal pump is an ideal choice for transferring the drilling fluids to cyclone unit as the cast iron impeller could bear the abrasion of thick solid particles in drilling fluids. Normally, both de-sander and de-silter would be equipped with each centrifugal pump with same capacity.

gn centrifugal pump

Centrifugal Pump

Centrifugal pump used as trip pump for when rising up the drilling pipe

When replace the drilling bit or drill pipe, the rig winch will raise the drilling tools out of the well. At this time, extra drilling fluids need to be injected down to the well hole to keep the pressure balance in the well. The drilling fluid is pumped down to well by using the centrifugal pump. By checking the amount of returned the drilling fluids, the operator could know the earth layer pressure and if there is any leaking under the well hole.

Centrifugal pump used as mixing pump for mud mixing

All the mud recycling system need mud mixing system for pre-mix the drilling fluids and adding the additional chemicals in the fluids during drilling process. The chemicals are brought to the mud tank system by the drilling fluids running in the jet mixing system. The power of the flowing fluids is coming from the mixing pump. Centrifugal pump can also be used as the power source of the mud gun line in the mud recycling system. In the same one mud system, it is better to use same model centrifugal pump for feeding cyclone and mud mixing, as the future maintenance would be convenient.
GN’s centrifugal pump is coupling connected with electric motor. All the parts are interchangeable with the world famous brand pump. If any requirement, please feel free to let us know.

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Jan 26

Last week, GN’s manufacturing department finished the fabrication of a mud mixing tank with double hoppers. Mud mixing tank is widely used in the drilling mud recycling system for mixing and re-configuration the drilling fluids. Also sometimes it will be used for storage the active drilling fluids.

mud-mixing-tank-with-double-hopper

mud mixing tank system

A mud mixing system is always consisting of mixing tank, agitators, mud guns, mixing pump and mud hoppers. Generally, the mixing pump and the mud hopper will be located at one end of the mud tank to make the mixing tank system a compact and single unit, while in some projects, the mixing pump and hopper are installed on a separate skid so that the mixing tank and the jet mud mixer could be used much freely. The picture in this article shows that the jet mud mixer skid was located at one side of the mixing tank. There are one mixing pump and 2 mud
hoppers on the skid. The mixing pump is connected with both hoppers, one of the hoppers is used for mixing barite to make weighted drilling fluids, and the other one is used for adding bentonite into the drilling fluids.
There is a steel frame around second hopper with steel bars over the hopper. This horizontal steel bar is used to hang the bentonite bag which will be hooked at 4 corners of the steel frame to make it easier for adding the bentonite powder into the hopper. It is worthy to mention that the steel bar is with forklift lifting slot so that the bar with bentonite bags could be lift and put on the frame by a forklift to save human power.
This mud mixing system is with a control panel to control mixing pump which could transfer mud to both hoppers. On the mixing tank, there is another charge pump which is used to transfer the active mud back to the rig for reuse.

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Nov 27

GN Solids Control deliveried one set of mud mixing system which is work with a mud vegetable in Caribbean. GN Solids already have several clients intended for solids control equipment or maybe related equipment or mud tanks from Caribbean water and this client is already experience of GN Solids for more than four years before place order to get mud mixing system. Our factory test already passed just before delivery to sea dock and realeased delivery with last week.

Main EquipmentsOf the actual Mud Mixing System
20151016_Mud_Plant_1
You can find one set of two panel shale shaker for remove solids in the drilling mud to get first phase cleaning. The particular GN shale shaker almost all wedge type installation intended for fast replacement and plus 2 degree for minuscule shale shaker deck angel, -1 to +5 qualification deck angel for several panel shale shaker. Shale Shaker screen is stainless substance for screen mesh to help you screen working better.

A pair of sets of high speed decanter centrifuge to remove the very good solids after shaker patio separation above 2 instructions 5 micron at 3200 RPM speed. It is stainless steel material for centrifuge jar and rotating part and another set of submersible slurry pump used to feed drilling mud into centrifuge inlet. Often the bowl size 360 milimetre diameter and 1270 milimeter bowl length for fifty cubic meters per hour the treatment of capacity.

4 sets involving 40 feet container sizing mud tank for mud storage with mud agitators, control panel, handrail along with walk way, etc . The particular mud tank can be personalized as per clients request, typically the 40 feet or twenty feet size just for move convenient in side from the country. Some client buy mud tank with skid mounted which can be pull regarding moving mud tank to put it briefly distance.

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Apr 05

As per the feedback from the customers who are engaging in the pilling business, GN designed and perfect the economic mud recycling system specially for the drilling mud cleaning application in piling project. On the consideration of limited location area of the piling project job site, GN’s piling mud recycling system is designed with a very compact structure but with full functions for drilling mud recycling.

GN economic desander unit (2)

De-sanding Unit

Below is the standard configuration of piling mud recycling system with treating capacity of 500GPM.
Model: GNMS500-D
Flow Rate: 500 gallons per minute
Cyclone Specs.: 1 pc 10” de-sanding cyclone made from 100% polyurethane
Screen Specs.: Shale shaker with up and down 2 layers screen with total screen area of 2.23m2
Feeding Pump: Mechanical seal type centrifuge pump of 50 HP used to feed mud to the de-sanding cyclone
Cut Point: Solids Removable down to 40 microns
Catching Tank: Under located catching tank for mud storage. The tank is equipped with lighting system and ladders for easy operation.
Electrical Control System: Explosion, water, and dusty proof electrical control panel with SIEMENS or Schneider components

GN also has the model of GNMS200-D and GNMS1000-D available and the treating capacity is separately 200GPM and 1000 GPM.
The advantage of this type mud recycling system is cost competitive. By connecting with storage tank and mud mixing hopper, this de-sanding unit could also be used in other kind of project like the small horizontal directional drilling, micro tunneling and water well drilling.

GN economic desander unit (1)

Economic Mud Recycling Unit Layout

GN recommends the layout of this economic mud recycling system:
1) Mud Pit
2) Submersible Slurry Pump
3) Mud Recycling System
4) Storage Tank
5) Outlet Pipe
6) Jet Mud Mixer.
GN Solids Control also offers submersible slurry pump, mud storage tank, as well as jet mud mixer per request.
GN is now on promoting this type economic mud recycling system, for more information, you may sent inquiry to sales@gnsolidscontrol.com

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Feb 08

In some mining projects, before the exploitation, the contractor would like to do some research on the geological condition. The most popular method is to use the core drilling machine to get some sample of the stratum. By analyzing the stratum sample, the mining operator would get some basic information like the mineral reserves and what kind of the mineral it is.

When getting the sample of the stratum, the contractors always apply to use the core drilling machine to get a series column shape stratum. The drilling bit is a type of pipe, not like the drilling project for oil and gas, the core drilling not need too much drilling fluids to cool down the drill pit and take the cuttings out from the drilling whole. However, in order to make sure the better performance of the drilling process, the drilling contractor always will get a solids removal unit to separate the drilling cuttings from the drilling fluids.

Now the solids removal package unit specially for core drilling designed and manufactured by GN Solids Control has already been applied on site and the performance was proved good.

GNLW223 Centrifuge

GN Centrifuge for Core Drilling

In GN’s solids removal package unit, the equipment involved is as below:

Shale shaker model of GNZS752 with 2 panel screens, which is used as the first stage solids removing unit to separate out the larger size solids in the drilling mud.

High speed decanter centrifuge GNLW223 which is also the key equipment in this solids removal unit. It could run at a typical speed of 3800 RMP that ensure a good performance for dewatering. The semi-dry solids discharged out from the centrifuge unit could be transported easily.

Considering the requirement of the small footprint, this solids removing unit is designed structure compact and the mud tank only has 2 compartments separately to be used for sand settling and mud mixing. The centrifuge pump used in this system could both transfer the mud to centrifuge and mud mixing. This dual function centrifugal pump saves great power cost and reduces the system size.

For the power supply, GN could also provide a diesel generator as an option.

GN Solids Control is welcoming the customer worldwide come to us for learn more about the core drilling solids removal unit.

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Nov 16

GN’s drilling mud recycling system is always equipped to the drilling rig and provided together to the end user. Just like the China domestic rig manufacturer of SJ from Sinopec and RG from CNPC who always get the drilling mud recycling system from GN solids control to equip with their drilling rig, the provide to their customer together. Not too long time before, GN finished on set solids control system for 750 HP drilling rig for Sinopec SJ’s Turkey project.

GN 750HP Rig Mud System

GN ZJ30 Rig Mud System

750 HP rig in China would also be referred as ZJ30 which could drill to depth of 3000 meters. The drilling mud recycling for this rig is configured as below:
4 units’ mud tanks systems include 1 recycling tank, 2 active mud storage tanks and 1 mixing tank. On the first tank for sand trap, there is also a compartment used for trip tank. When the drilling pipe need to be pulled out and changed, the drilling mud in the trip tank compartment would be pump back to the drill hole for protecting the well wall and keep stable downhole pressure.
This mud recycling system is a 3 stages design with shale shaker, mud cleaner (de-sander & de-silter). 2 units of GNZS703E-HB shale shaker have the total capacity of 240 cubic meters. The customer could adjust the feeding rate to each of the shaker by getting a flow divider. 1 unit of mud cleaner is with 2 pcs 10” de-sander cyclones and 12 pcs 4” de-silter cyclones.
On the mud storage tank, the mud agitators and mud guns would be equipped to prevent the solid particles sedimentation down to the tank bottom. Each tank would be equipped 3 units agitator and mud gun.
This system adopts the 55kw centrifugal pump for transferring the mud to the hydrocyclones and the mixing pump is the same model as consideration of future easy maintenance and repaire. The trip tank also is equipped with trip pump for pumping the mud back to the downhole.
All the electric parts like the motor and control panel are explosion proof standard especially for application in oil drilling ndustry. GN could provide complete line for oil drilling rig mud recycling system ranging from 350HP to 2000HP, welcome for contact on the inquiry and solution.

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Aug 23

In last article, we gave a brief introduction on how GN layouts the mud suction and mixing pipeline in the mud circulation system. On the mud tank, there are also other functional pipelines that would be designed and laid properly for complete the mud circulation system utility and enhance the working efficiency. Today we would like to gave a explanation on how GN engineer team design the mud gun pipeline and cleaner water line.

GN Drilling Mud Gun

GN Mud Gun with 3 Nozzles

What are the Functions of the mud gun line and clean water line

It is well known that in the mud tank, the mud agitator would be installed to agitating the drilling mud to prevent the solids particle sedimentation down to bottom of the mud tank, thus the drilling mud would be transferred or flow to next stage process as the suspension form. That would be benefit for subsequent equipment to work on the drilling mud. Mud agitator is high efficiency device. However, the mud agitator still can not get to the dead corner of the tank inner. For the issue, the solids control engineer always use the mud gun to solve the problem, the mud gun would be injected with drilling mud, high pressure mud out from the mud gun nipple would be jetted to the mud tank corner, by adjusting the angle of the mud gun, almost all the corner would be reached. During the mud recycling operation, the spraying mud would defile the equipment and lead to low efficiency. Moreover, the drilling mud would loss when separating. The mud engineer would have to add water into the mud tank to mix new drilling mud. The laying of the clean water pipeline would be necessary for these purpose, it should be very easy for the engineer to get the water.

How GN design the mud gun line and clean water line

GN’s mud tank are always rectangular, the top of the tank structure is applying the 4” tube steel. GN’s engineer would used this tube steel as the channel of the drilling mud and clean water. Only the seamless steel tube would be chosen in case of leakage of the liquid under high pressure. The mud gun line would be laid on every mud tank in the mud system so that the mud could be transferred to every mud tank compartment. Always, the mud gun line would occupy 1 length and 1 width of the tank top structure steel tube, between different tanks, the mud gun line would be connected by hose. To avoid confusion, the mud gun line would be laid at same side of the mud tank, while the clean water line is chosen as the counter sides.
The mud gun is installed inside the mud tank, thus the opening of the mud gun line would be inner the tank for easy connecting with mud gun terminals. While, the clean water line has several opening on mud tank top surface, the mud engineer would connect the water line by using a tap and control by a valve.

Regarding the power, the mud gun line is connecting with the mixing pump or high pressure mud tank. The clean water would be pumped into the water line with sufficient power. GN’s design on the mud gun line and clean water save cost on additional pipeline and effectively use the mud tank existing structure.

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