As a part of rig package, mud system is a separate but an essential part, the handling of drilling fluids can save huge cost of drilling. In the early oil industry open earthen pits were used as settling area to separate solids and mud thereby acting as a solids control equipment.
mud system for a rig
Now, with the stringent environmental regulations and high mud costs, the economics of an effective mud system come into consideration. Different solids control companies introduce zero-discharge systems, closed-loop systems, “quick move” technology, screening technology, disposal options etc. No reserve-mud pit is used in a truly closed mud system. Mud is continually processed primarily by mechanical means, such as screening, hydrocyclone and centrifuging to remove solids initially. A second stage to remove colloidal solids is by wastewater cleanup techniques.
Major components of a mud system, including:
Mud gas separator, flare ignition device
Shale shaker, mud cleaner(or desander, desilter), vacuum degasser, decanter centrifuge , centrifugal pump, mud hopper, mud agitator, mud gun, mud tank and others, such as cutting dryer, screw auger, mud cooling unit,etc.
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Closed loop drilling fluids system (sometimes referred to as closed mud or pitless system)are system which do not need mud pits, which can greatly reduce or eliminate the discharge of toxic drilling wastes on site.
What mud systems need mud pits?
closed loop drilling fluids system
1 HDD mud system need mud pits, the drilling mud flow to mud pit, and the slurry pump installed into the mud pit transfer the mud to HDD mud cleaning system, and the processed mud is pumped to the rig again.
2 At a typical oil & gas drilling site, drilling fluids are circulated through the wellbore, then the fluids and drill cuttings are deposited in a reserve pit dug near well. This pit is used to hold used drilling fluids and wastes. There are many potential problems from pits — leaky liners and overflows can lead to soil and water contamination, pits can produce odors and toxic air contaminants, and pits can be a hazard for birds and wildlife.
What is closed loop drilling fluids system?
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GN solids control mud system can be used for both oil & gas drilling and water well drilling. Water wellis an excavation or structure created in the ground by drilling to access groundwater in underground aquifers. Most shallow well drilling machines are mounted on large trucks, trailers, or tracked vehicle carriages. Water wells typically range from 3 to 18 m deep, but in some areas can go deeper than 900 m.
GN200gpm trailer mounted mud system for water well drilling
Most of the water well drilling rig is trailer mounted or truck mounted, for convenient transportation from one place to another. Some contractors do not process the used mud from water well drilling, but recently there are more strict laws for environment protection, they have to search for small mud recycling system to complete the job. They prefer trailer mounted mud system, GN 200gpm trailer mounted mud recycling system is widely used for water well drilling. Total transportation dimension is 5500x2300x4000mm( including the trailer height), it meets the transportation limit in most of the countries in the world( you do not need to remove anything when transport in domestic). You only need to remove the mud cleaner and shale shaker from the tank, then I can fit for 40feet standard container.
GN200gpm trailer mounted mud system including:
GNZS752 shale shaker 1set
GNZJ752 mud cleaner 1 set
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GN designed centrifuge mud tank for oilfield and dredging project, with 1 unit of GNLW553VFD decanter centrifuge(or other model available) and Nemo pump to feed the centrifuge, the centrifuge tank is divided into 2 compartment, the mud after treated by shale shaker, desander/desilter flow or be pumped to compartment 1, then Nemo pumppumped it from the compartment 1 to the centrifuge for processing, the clean drilling mud dropped into compartment 2, which can be pumped to other application or flow to anywhere required.
centrifuge mud tank
In oilfield application, sometimes mud hopper unit also installed on centrifuge mud tank, the mud which will be feed to centrifuge is with solids smaller than 20 microns, it has been separated by desilter cone. After treated by decanter centrifuge, the max solids remained in the drilling fluids is smaller than 5 microns, it is called “clean mud”. The clean mud may be weighted in pill tank/compartment and mixed by mud mixing hopper & mixing pump.
In Dredging project, centrifuge mud tank is applied after dredging slurry separation system, after treated by the desander ( or sometimes desilter), the solids remained in the slurry may be too fine to be separated out by the centrifuge, so you need a flocculation tank before centrifuge mud tank. After flocculation, the mud is concentrate so It is easy for centrifuge to separate it, this is for better performance. So you have to use a positive displacement pump to pump the flocculated mud to centrifuge, otherwise the centrifugal pump will break it off. Sometimes filter press will replace the centrifuge, but efficiency of filter press is not so dissatisfied, so people use large treating capacity centrifuge instead.
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GN has 3 complete of mud systemfor sale now. They are in stock in our Beijing Warehouse. Originally there are 5 sets of complete rig package for drilling site in Iraq, and we already shipped the 2 of them to Iraq. Because of the bad situation in Iraq, the project is delayed, we will sell the left 3 sets of mud system with 30% discount.
mud system for sale
If you are interested, welcome to visit GN, we will show you the mud system in our yard.
Applications for the mud tanks:
1000HP/1500HP oil rig complete mud system with Derrick Solids Control or GN Solids Control Equipments.
Specifications of the Mud Tanks System
1 Mud tanks:
7x400BBL Mud Tank for one set
3 sets total capacity=8400BBL
Including Shaker Tank, suction tank, storage tanks, mixing tanks completed with agitators, mud guns, centrifugal pumps.
2 Solids control equipments for one set:
3x Linear Motion Shale Shaker Derrick FLC2000
1xVacuum Degasser Derrick 1200
1xMud Cleaner with 3x10inch desander and 16x4inch desilter, underflow linear motion shaker Derrick FLC2000
2xDecanter Centrifuge Derrick DE1000
3x Linear Motion Shale Shaker GNZS703
1xVacuum Degasser GNCQ270
1xMud Cleaner with 3x10inch desander and 16x4inch desilter, underflow linear motion shaker GNZJ703-3S16N
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GN designed and produce a complete set of 10000feet drilling mud system, it is around 3000m dept and horse power 750HP. It including 4 mud tanks,recycling tank, active tank, mixing tank, mixing skid. It is a customized system according to client’s isea.
Technical specification of 10000 feet drilling mud system:
10000ft drilling mud system
1) Recycling Tank (40feet Container Size) with 2 GNPS703 Shale Shaker,1GNZJ703 Mud Cleaner with 2x10inch Desander cones,12x4inch Desilter cones,and as well as desander desilter feeding centrifugal pump SB8x6-13(55Kw).And one trip pump for the trip compartment.
2) Active Tank(40Feet Container Size) with Mud Agitators and Mud Guns.
3) Mixing Skid(20feet container size) with 2 mud hopper, One SB8x6-13(55KW) Centrifugal Pump and one shear pump.
4) Mixing Tank(40feet container size) with one SB8x6-13(55Kw) mixing pump and one mud hopper, completed with mud agitators and mud guns.
Usually clients will buy 10000ft drilling rig from USA, so the electricity is 460V60HZ, 480V/60HZ, GN drilling mud system can meet their electricity rate. And our explosion proof mark of the electric control system is class1, div 1. As a part of the land rig of 10000ft, our drilling mud system including pipelines from shale shaker inlet to outlet of mud pump charging pump, including mixing pipeline, water pipeline, mud gun pipeline, overflow line, suction line,etc. Also we provide mud gas separator installed on the trip tank( if the mud system has a separate trip tank.) In this 10000 feet drilling mud system, their trip tank is in the 1st recycling tank, they have a trip compartment with trip pump.
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Geotechnical drilling is drilling which is often related to the construction of a structure such as a building or an oil rig. It can be part of the construction process as well as part of the investigation process conducted on site before the structure is built.
drilling fluids processing system
It includes drilling to remove rock and soil samples, along with drilling to evaluate soil stability and other topics of interest. As part of the construction process, geotechnical drilling includes drilling to prepare for foundations, caissons, and various supports. Drilling of this kind is overseen by an engineer who confirms the placement of the drill and makes sure that the drilling is conducted properly.
What is geotechnical investigation?
Before the construction starts it is good to know your conditions.Investigating the soil is a good way to map the challenges ahead.
Commonly used methods
Depending on ground conditions and required drilling depth, core drilling or RC drilling can be the methods of choice. SPT or Standard Penetration Tests are performed by recording the number of hammer blows needed to drive up a sample tube to certain depth in to the ground. This would indicate the relative density of the soil.
How to process the mud produced by Geotechnical drilling?
The mud produced by Geotechnical drilling is very less, it depends on the length and the core diameter. Usually its treating capacity is only 5m3/h or less, but it can not be discharge away directly to the environment because of strict environment protection regulation. If you have such problem, pls contact with GN solids control.
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The majority of Mud Motor use is in the drilling of Directional Holes. Many of our HDD contractor clients asked if we have mud motor for sale, they prefer a complete solution for triplex mud pump, mud motor, recycler, mixing unit, GN can provide mud recycler and mixing unit as a package.
HDD mud motor recycler
Mud motor also called Drilling Motor refers to a Progressive Cavity Positive Displacement Pump placed in the Drill string to provide additional power to the bit while drilling. The PCPD Pump uses Drilling Fluid to create eccentric motion in the power section of the motor which is transferred as concentric power to the drill bit. The Mud Motor uses different rotor and stator configurations to provide optimum performance for the desired drilling operation, typically increasing the number of lobes and length of power assembly for greater horsepower. In certain applications, compressed air, or other gas, can be used for Mud Motor input power. Normal rotation of the bit while using a Mud Motor can be from 60 rpm, to over 100 rpm.
GN mud recycler and mixing unit can match with Ditch Witch HDD rig and Vermeer rig according to their required mud flow capacity. The recycled drilling fluids by GN mud recycler and mixing unit are provided to mud motor for charging.
Mud motors are powered by drilling fluid ,the fluid consists of water mixed with bentonite or polymer additives designed to match various soil conditions. The fluid is pumped down through the drill string to the downhole motor, which converts the flow to rotary speed and torque.
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Directional drilling (DD) is seen as a marriage of conventional road boring and the directional drilling of oil wells.
It is also known as directional boring, horizontal drilling, slant drilling, or deviated drilling, is a method of trenchless technology that involves drilling a non-vertical well or borehole. It can be broken down into three main groups: Oilfield Directional Drilling, Utility Installation Directional Drilling (or H.D.D. or Horizontal Directional Drilling) Directional boring, and in-seam directional drilling to extract coal bed methane.
directional drilling machine
Many directional boring machines also use a drilling fluid or slurry called mud. Other machines use foam or air, or both. The drilling fluid or mud is composed of bentonite clay and water with additives for enhancing performance. The higher-pressure jet of fluid is used in soft ground to cut through the soil. The cuttings then get suspended in the fluid. As more fluid is pumped down into the hole, the cuttings are brought back up to surface where they settle in a pit or are removed mechanically.
GN solids control equipments are used to handle the drilling mud with cuttings, to separate the big cutting out of the drilling fluids, so that the mud can be used for drilling again.
For oilfield directional drilling, we provide a complete solids control system, including 4-class cleaning of mud, shale shaker – desander – desilter – centrifuge, sometimes vacuum degasser is applied.
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If you have over 30 years experience for drilling, you will know, what is real required and what is not for close loop mud system. Sometimes people just seek for unrealistic specifications, which did not mean good for the operation. GN solids control would like to share your new idea about the drilling solids control, and put your idea into realization. We have the ability to design as your layout, no matter you choose us as the complete system manufacturer or not.
close loop mud system
Recently drilling has been changed a lot, the old experience did not work, people has their own new design. “Zero discharge mud systems” are urgently required because of the environment protection. Auger box, screw conveyor can be used to collect the drilling cuttings from shale shaker, desander, desilter, mud cleaner, dewatering unit and centrifuge, then transfer them to a catch pit for later processing. In some development company where the government did not have strict regulation on environment protection, they even do not use any mud system, and let the drilling fluids discharged directly. They may face big problem in the future.
Dewatering unit is required to work together with the system, it can make further process of the fluids after processed by centrifuge after the well is finished.
The mud tank is designed similar to 40 feet standard container, it is more convenient to transport in any countries in the world. All the lifting device, dimension, skid is same with container, and we put GN solids control equipments on top of it.
If you required Close Loop mud System for oil & gas drilling, pls contact GN solids control, our service including design, consultant, manufacture and shipment.