Monthly Archives: November 2014

What is the effect solids control equipment exerts on drilling project 1?

One of the most critical roles of this mud is as a lubricant. Drilling causes tremendous friction, which can damage the drills or the formation being drilled. Drilling mud cuts down on the friction, lowering the heat of drilling and reducing the risk of friction-related complications.

solids control system

The mud also acts as a carrier for the materials being drilled, with material becoming suspended in the mud and then being carried up the drill to the surface.

 

Brightway solids control equipment is the precondition to maintain the excellent drilling mud property which is the premise to prevention of underground accident, protection of oil layer, improvement of drilling rate and reduction of drilling cost.

decanter centrifuge

shale shaker

Therefore,all the drilling rigs needs the assistance of solids control equipment for safe and effective operation.However,the performance of solids control equipment will directly affect drilling rig operation quality.Installed at the top of closed mud tanks,the drilling fluids solids control system is an combination of drilling purifaction equipment where drilling shale shaker,vacuum degasser, desander, desilter, mud cleaner, and decanter centrifuge are involved, and auxilairy solids control equipment including mud agitator, centrifugal pumps, jet mud mixer and etc.

Drilling fluids solids control in drilling mud system 2

Solids control is an indispensable technique used in oil field to separate the solids in the drilling mud that are crushed by the drill ing bits and carried out of the well surface.Solids control system is the first stage of the drilling mud recirculation process, which includes a lot of equipment, shale shaker, degasser, mud cleaner( consists of desander anddesilter), decanting centrifuge, and other components, such as, jet mud mixer, mud agitator, mud gun, and mud tanks.
solids control system
Some environmental problems have been associated with drilling mud. Historically, contaminated and dirty mud was dumped in open pits, allowing the natural environment to become polluted. Additionally, very aggressive chemicals are sometimes used to clean materials brought up when filtration was not sufficient. These chemicals can pollute the environment as well, generating a variety of environmental problems.
shaler shaker

 

shale shaker

For this reason, drilling waste management is needed here to treat the waste drilling mud and prevent pollution, now, drilling waste management becomes more and more important. Brightway integrated Waste Management Solutions System reduce the waste from the source, maximize recycle and reuse to achieve a minimum waste discharge that complies with the governmental regulations.

Drilling fluids solids control in drilling mud system 1

Drilling mud system, also called as drilling fluids, is a mix liquids used in the process of drilling deep oil or gas wells. The drilling mud is an integral part of the drilling process, serving a number of functions.

solids control system

One of the most critical roles of this drilling mud is as a lubricant. Drilling causes tremendous friction, which can damage the drills or the formation being drilled. Drilling mud cuts down on the friction, lowering the heat of drilling and reducing the risk of friction-related complications.

solids control system

The mud also acts as a carrier for the materials being drilled, with material becoming suspended in the mud tank and then being carried up the drill to the surface. Different muds can all be used for different circumstances. There are water, oil, and gas-based muds which made from true mud mixed with materials like bentonite clays to synthetic drilling fluid.
shale shaker
Due to its high cost, drilling mud system is recirculated throughout the drilling process. As it rises to the surface, it passes through shale shaker that screens the materials from the borehole, before being cycled back into the drilling mud system that delivers mud to the head of the drill bit. This recirculation process, called as drilling fluids solids control, is designed to cut down on waste by reusing as much mud as possible.

The five stages of solids control equipments 2

Second stage solids control equipment: vacuum degasser

Vacuum degasser separate H2S and other gases. It is helpful for reducing cone part abrasion on desander and desilter during further handling.It also can beused as mud agitator with big power.

Third stage solids control equipment:Desander

Desander is used for separating 45-74μm particle from drilling mud. It is adopted with flexible and replaceable cones for option ( 1pc to 3pc,dia 10″ or 12″).Good wear resistance for cone material with PU and high-chromium iron for option.Smaller size motor and lower position deck,making sure lighter participating vibration weight,getting bigger treatment capacity.

Fourth stage solids control equipment: Desilter
Brightway desilter is used as 4th stage equipment for drilling fluid solids control system.It separates 15-44μm particle.Clamp and replaceable cone design,the desilter coupled with flexible cone number for option(8pc,10pc,12pc,16pc,20pc,dia 4″ or 5″).Smaller size motor and lower position deck,making sure lighter participating vibration weight,getting bigger treatment capacity.

 

Fifth stage solids control equipment: Decanter Centrifuge

Brightway solids control series Decanter Dentrifuge is used for separating tiny particle(dia above 2μm).The decanter centrifuge is versatile for different drilling mud with various proportion and viscosity.Brightway solids control is the most advanced decanter centrifuge supplier in China,and has won high recognition and praise from domestic and abroad with science core technique and a lot of innovative patents.

The five stages of solids control equipments

Solids control is an indispensable technique used in oil field to separate the solids in the drilling mud that are crushed by the drill ing bits and carried out of the well surface. Normally solid control system is consist of five stages, including shale shaker, vacuum degasser, desander, desilter and centrifuge, and other components including mud tanks, jet mud mixer, centrifuge pump, mud agitator,vertical centrifuge and mud gun.
solids control system
Brightway as an advanced and professional solids control equipment supplier, some customizes specific solids control equipment depending on different capacity and environment and provides its clients with best solutions to reduce drilling cost and ensure drilling benefits.Brightway solids control was to be the environemt protector to rescue drilling site from being polluted.The folowing is the main five solids control equipment.
solids control system
The first stage solids control equipment: Shale Shaker
shale shaker
Shale shaker is used as the first stage solids control equipment for drilling fluid circulation system. It removes 74μm or above size particle from drilling mud.Equipped with High G-force linear motion up to 7.4 G, the shale shaker will ensure the minimum waste of mud and maximum recycling efficiency. Deck adjustment while drilling patented technique AWD (adjust 0.5°/time,from -1°~5°)mechanical mode,to ensure safe operation.Smaller size motor and lower position deck,making sure lighter participating vibration weight,getting bigger treatment capacity.

Mud Tank System

High quality oilfield mud tank system must be fabricated under professional configuration. The optimal proposal with high efficiency and low cost. Cater to clients’ specific demand and actual drilling conditions.

solids control system

All the equipments and tanks should be made of high quality raw material and produced according to executive standard. Inspect all equipment and oilfield drilling mud tank completely and strictly. Ensure all pipes are connected with each other. All welding line should be sealed and plain.
solids control systemshale shaker
Actually, we need almost fluid system include shale shaker tank, active, storage tank or mixing tank. Sometimes, there will be also the trip tank, pill tank, and swab or test tank. The mud tanks are different size or dimension. It depends on whole mud tanks system capacity or flow mud pump flow rate. Whole mud system including different phases and process steps. We need to calculate all information in detail.

The Structure of Shale Shaker 3

Different brands of shale shaker have different methods of fulfilling these demands by using specialized screen tensioning apparatus, rubber seals around the screens, basket reinforcement to limit flex, rubber Float Mounts rather than springs, rubber Deck seals and selective vibrator placement.

shale shaker
Basket Angling Mechanism- The shaker basket must be capable of changing its angle to accommodate various flow rates of drilling fluids and to maximize the use of the shaker screen bed, this is where the angling mechanism plays an important part.

shaker screen
Vibrator- This is the device which applies the vibratory force and motion type to the shaker bed.

1

A vibrator is a specialized motor built for the purpose of vibrating, While containing an electric motor to provide the rotary motion it uses a set of eccentric weights to provide an omnidirectional force. To produce the proper Linear motion a second, counter rotating, vibrator is added in parallel to the first. This is what gives us the linear motion, “high G” shaking of the basket.

The Structure of Shale Shaker 2

Feeder- The Feeder is essentially a collection pan for the drilling fluid before it is processed by the shaler shaker, it can come in many different shapes and sizes to accommodate the needs of the mud system. The most commonly used feeder is known as the weir feeder, the drilling fluid enters the feeder usually through a pipe welded to the outside wall near the bottom of the feeder tank, it fills the feeder to a predetermined point and like water flowing over a dam the mud (drilling fluid) spills over the weir and onto the screening area of the shaker.

shale shaker

This method of feeding the shaker is most widely used due to its ability to evenly distribute the mud along the entire width of the shaker allowing for maximum use of the shaker screen deck area.

 

Some feeders can be equipped with a bypass valve at the bottom of the feeder which allows the drilling fluid to bypass the shaker basket and go directly into the hopper and back into the mud system without being processed by the shaker screens.

Jet mud mixer
Screen Basket- Also known as the screen “bed” it is the most important part of the machine, it is responsible for transferring the shaking intensity of the machine, measured in “G’s”, while keeping the “shaking” motion even throughout the entire basket. It must do all that while holding the screens securely in place, eliminating drilled solids bypass to the mud hopper and allowing for easy operation and maintenance of the machine.

The Structure of Shale Shaker

Solids control is a technique used in drilling rig to separate the solids in the drilling fluids that are crushed by the drill bits and carried out of the well surface. Normally solid control system is consist of five stages, including mud tank, shale shaker, vacuum degasser, desander, desilter, centrifuge. Shale shaker is used to separate the big solids with diameter above 75μm, and 45~74μm for desander, and 15~44μm for desilter. Sometimes desander & desilter are combined as high efficient mud cleaner.

solids control system

When air enters into the drilling fluids, vacuum degasser is used to separate the air. If no air in the mud, the degasser would work as a big mud agitator. All these equipments are mounted on the top of the mud tank. After separating the solids, the clean mud would be pumped into the borehole again.

 

The shale shaker is the first stage of solids control equipment in drilling purification system. It can remove cuttings above 75μm brought from the drilling well to leave the liquid with smaller particles into the tanks below, which will flow into next grade solids control equipment to be treated.

shale shaker
Shale shakers consist of the following parts:
Hopper – The Hopper, commonly called the “base” serves as both a platform for the shaker and collection pan for the fluid processed by the shaker screens, also known as “underflow”. The hopper can be ordered according to the needs of the drilling fluid, aka “mud” system. It can come in different depths to accommodate larger quantities of drilling fluid as well as have different ports for returning the underflow to the mud system.

Mud Cleaning System for Diamond Drilling

Diamond drilling is becoming more and more popular now as following the diamond stone get cheapper and cheapper .

 

Diamond core drilling uses a diamond bit, which rotates at the end of drill rod (or pipe).  The opening at the end of the diamond bit allows a solid column of rock to move up into the drill pipe and be recovered at the surface.  Standard core sizes are 7/8 inch (EX), 1 3/16 inch (AX), 1 5/8 inch (BX) and 2 1/8 inch (NX).

shale shaker

Most drill rods are 10 feet long. After the first 10 feet is drilled, a new section of pipe is screwed into the top end, so the combination of pipes can be driven another 10 feet into the ground.  The diamond bit is rotated slowly with gentle pressure while being lubricated with water to prevent overheating.  The drill depth is estimated by keeping count of the number of drill rods.

mud agitator

 

For diamond drilling , its required treating capacity is allways small . One diamond drilling company ordered us a 500liters/minute mud cleaning system without tank for diamond drilling mud cleaing . One mud cleaner with desander and desilter cyclone and feeding pumps for desander & desilter . This mud cleaner and feeding pumps is one the first parts we calling processing part . One jet mud mixer with  pump and a mud agitator on the mixing part .