Category Archives: Drilling mud Recycling System

1000GPM mud recycling system for Malaysia HDD project

Horizontal directional drilling (HDD) is being highlighted in the underground construction industry as a method that positively affects the way we impact our environment.

HDD mud recycling system is design for Horizontal Directional Drilling ( HDD ) rig. Depending on drilling mud requirement, a HDD mud recycling system can including shale shaker, desander cyclone, desilter cyclone, mud tank, mud agitator, transfer pump, etc.

shale shaker

DC Machinery manufactured a set of 1000GPM mud recycling system for a Malaysia HDD project. The configuration of the mud recycling system is the standard one which is more cost-effective. Mud recycling systems have added great value to the HDD industry. In many cases it is very difficult to be successful on a project without one.

SONY DSC

SONY DSC

Future environmental regulations will drive the need for implementation of them in smaller HDD system. As you look to implement a cleaning system in your program, do your homework and set realistic expectations that will help ensure your success.

Supply drilling fluid circulation system and centrifugal pumps

The drilling fluid circulating system is like a close loop electric circuit through which drilling fluid (i.e. mud) can travel from surface to all the way down hole and back to its initial point (i.e. mud pit).

solid control

The main components related to the circulating system are mud pumps, mud pits, mud mixing equipment and contaminant removal equipment . Solid control system mainly include, shale shaker, desander, desilter, decanter centrifuges and ect.

SONY DSC

SONY DSC

Besides above, DC Solid control also suppli all capacity feeding pump, include sand pump, slurry pump, water pump and ect.

We will always supply the drilling fluid system, the parts and the technology service to ensure the efficiency in the production of our customers. Our tenet is, making the advanced technology, ensuring the good quality, and offering the best service.

US Oil Drillers Add Rigs For 11th Week In 12

Sept 16 (Reuters) – U.S. drillers this week added oil rigs for an 11th week in the past 12, according to a closely followed report on Friday, although the rate of increases has slowed as crude prices remain below the key $50 a barrel level that spurs a return to the well pad.

That is, however, the longest streak of not cutting rigs since 2011 with the rig count increasing or holding steady every week so far this quarter.

oil-rig-1

Drillers added two oil rigs in the week to Sept. 16, bringing the total rig count up to 416, the most since February but still below the 644 rigs seen a year ago, energy services firm Baker Hughes Inc said.

The oil rig count plunged from a record high of 1,609 in October 2014 to a low of 316 in May after crude prices collapsed in the biggest price rout in a generation due to a global oil glut. That decline continued through the first half of this year when drillers cut 206 rigs.

U.S. crude futures were trading at around $43 a barrel on Friday after hitting a five-week low on renewed oversupply fears. They were on track to fall 6 percent for the week on Friday.

“With a large proportion of (rig) gains from smaller operators and oil now sub $45 we would not be surprised to see a flattening or even decline over the next few weeks,” analysts at U.S. financial services firm Cowen & Co said in a report this week.

Longer-term, however, analysts expect the rig count to rise slowly for the rest of 2016 before jumping higher over the next two years with a rebalancing of supply and demand. While U.S. oil futures for the balance of 2016 are only fetching around $44 per barrel, calendars 2017 and 2018 are trading near $48 and $50, respectively.

Analysts at Simmons & Co, energy specialists at U.S. investment bank Piper Jaffray, forecast total oil and natural gas rigs would average 498 in 2016, 704 in 2017 and 981 in 2018.

That, however, is not much higher than the average 479 oil and gas rigs that Baker Hughes said were active since the start of the year. In 2015, the total rig count averaged 978.

Since total rigs fell to 404 in May, the lowest since at least 1940, Baker Hughes said more than two-thirds of the additions have been in the Permian basin in west Texas and eastern New Mexico, the nation’s largest shale oil play.

Anadarko this week said it would boost capital spending and add four rigs by the end of the year, two in the Delaware basin in the Permian and two in the DJ Basin in Colorado.

DC Solid Control Provides Skid Mounted Mud Recycling Unit

The mud cleaning system has the function of mud recycling and mud mixing of drilling mud.

The mud system is engineer designed to clean, recycle and mixing drilling mud in one mud tank package. The flow capacity is 500gpm + with shaker operating at 40 mesh screens and mud density 1.2g/cm³. It removes undesired drilled cuttings down to 12 microns with 4″ desilter cones. Compact design and small foot print allows it to be easily moved and transported . 500gpm mini mud system is widely used in the following drilling applications:

Horizontal Directional Drilling (Trenchless Construction)
Water Well Drilling
Tunnel Boring Machine (TBM)
Coal Bed Methane (CBM)

mud system

Mud Cleaning System Configuration

1 x high G force linear shaker
1 x mud cleaner (1 x 10″ desander, 8 x 4″ desilter, 1 x dewatering shaker screen)
2 x transfer pump,
1 x mixing pump, 1 x mixing mud hopper
1 x mud agitator
cat walk, handrails, valves etc.
electric control system

We design and manufacture compact drilling mud system from 200GPM upto 2000GPM for HDD, water well drilling etc. Customized ! Compact ! Module-Built!

Assortment of solids phase in oil drilling fluid

According to the different characteristics, there are different classification methods of the solid phase in drilling fluid.

  1. According to the role of solid phase in the drilling fluid, it is divided into useful solid and harmful solid phase.
  2. The solid phase is divided into high density solid phase and low density solid phase according to the density of the solid phase. High density phase is the weighted materials based on the drilling process requirements to increase the density of the drilling fluid, low density phase including the bentonite and treatment agent that required by configuration of the drilling fluid, and there are cuttings.drilling fluid7
  3. By whether solid phase and liquid phase is reacted, the solid phase in drilling fluid is divided into active solid phase and inert solid phase. The solid phase that can react with liquid is called active solid phase, and can not react with liquid is called inert solid phase. The former such as bentonite, clay and shale, etc, or such as limestone, granite, barite etc.

Drilling waste water treatment technology

For offshore drillings, one of the biggest drilling waste is sewage which grows out of drilling fluids, rain, water used to wash bits and cooling water. Usually, the under-treated sewage weighs 30 times the well-bore volume. Therefore, sewage minimization is a very vital part in the whole waste treatment.

However, as the easiest waste resource to be reduced, water can be reduced in such ways as below:

One-way cooling system can save water and seal it inside the system while eliminating cooling water, braking water and sealing water to achieve water recycling. It is proved that it is not pricey to recycle the water and is able to save a large amount of liquids.

The reason that rain can be recycled is the correlation between drilling fluids and water. Rain is applicable in washing drilling equipment. The water used to wash drilling equipment can flow into water tank just like rain and should be recycled till it cannot function any more. It will be surprising to see how many times they can be reused.

The dirtiest water ( such as, deserted drilling fluids ) can be applied to wash the panel. Desander and filter can produce massive deserted drilling fluids( usually there is one portion of solid phase in 2 or 3 portions of fluid phase ). They can be used to wash drilling mud tank. And shale shaker and decanter centrifuge also need washing water. Water used to clean panel do not need purifying since it is not necessary to wash away solid phase and liquid phase with clean water. It will be very difficult to separate them during treatment procedure.

It is necessary to produce sewage. It is quite expensive to treat sewage, so vacuum device is preferable to washing water here. A gun-shaped controller with tube is a good idea. The tube falls and automatically closes the connection to disconnect the controller. Drilling operators prefer high-pressure, small-volume washer due to the less labor intensity, better washing effects and reduced sewage volume. Generally speaking, both the vacuum device and washer are put into use when treatment is not costly. However, the gun-shaped controller will offset the cost.

Different approaches can be conducted to separate and treat waste, for instance, water-based waste and oil-based waste can not blend until being managed together. During the operation, fluid from drilling mud pits should be reinjected so as to flow into spare drilling mud pits.

The development trend of mud zero discharge managemet

Waste drilling fluid is one of the main pollutants in the oil industry. In recent years, with the increasing demand of energy in the world, the types of drilling fluids are increasing, and the harmful components and the additives are also increasing. According to the statistics, the waste drilling fluid produced annually in our country is about 2500-3200 million cubic meters, of which the 1/2 directly discharged into the surrounding environment, the ecological damage is increasingly serious, and the harmless treatment of waste drilling fluid is imminent.

dwse

With the increase of environmental protection requirements, the corresponding treatment has been carried out in various countries. According to the different treatments and discharges between domestic and foreign, waste mud management methods are also many and varied, and the effect of each are not identical, including curing treatment method, chemically enhanced solid-liquid separation technology, mechanical dehydration method, recovery circulation and usage method, safety landfill burial etc. Technology of harmless treatment by curing process is one of the methods to be used more, but it just do the conventional treatment of inhibition and conversion to the waste drilliing fluid, the pollution of the environment is still serious by this method. And then with it, the drilling fluid mud not landing treatment process opens up a new chapter of waste mud management.

Adverse effects of excessive solid content in slurry

The existence of excessive useless solid phase in mud is the biggest hidden trouble to destroy the performance of drilling fluid, reduce drilling speed and lead to complex situations in all kinds of wells. People in the long-term practice and continuous research, summed it up that the high content of useless solid phase in drilling fluid will bring the following several points of adverse effect for drilling works.

1.The influence of solid phase to drilling speed

When the mud solid content is high, the ability to carry the drilling cuttings is weakened, a large number of large particles can not be discharged out of the well hole, causing the bit to broken bits repeatly, and thus increasing the wear of drilling tool, thereby affecting the drilling speed.

  1. The influence of solid phase to mud cake quality

During the drilling process, the amount of water loss and solid particle content will directly affect the quality of mud cake formed in the hole wall. A small amount of fluid loss, mud cake is thin and tough and will do good protection for the well wall,  which is our goal. High solid content, water loss of slurry increases, resulting in shale formation water hydration swelling and hole wall instability, and induce the hole accident.

drilling fluid7

  1. The influence of solid phase to circulation system

The higher the solid phase content is, the more the mechanical wear of the circulatory system will be. Too much solid phase in the mud will accelerate the wear of mud pump cylinder and piston, thereby increasing the maintenance time and lead to the decrease of the drilling efficiency. Drilling efficiency will be significantly reduced due to the increase of the auxiliary operation.

  1. The increase of waste pulp displacement, causing environmental pollution

In the process of drilling, the performance of the drilling can be changed due to the cuttings entering into the drilling mud continuously. Most of the mud is belong to alkaline solution, random emissions will not only destroy the vegetation, but also cause the alkalization of soil, and influence the vegetation regeneration. In addition, There are some additives in the drilling mud so that the color of mud will change into black, a large number of emissions will cause visual pollution to environment.

Purification procedure of drilling fluid solid control system

The larger harmful solid particles in the drilling fluid will be sieved and discharged after the screening of shale shaker.

The drilling fluid that has been purified by shale shaker enter into the sand tank of mud purification tank. And then using the sand pump to join the drilling fluid to the second level purifying equipment—the desander of combined mud cleaner and the drilling fluid will be separated from solids again.

After  excepting sand, drilling fluid discharged into the third storehouse of drilling fluid purifying tank through overflow line of desilter and will be pressured into the third  grade purification equipment—desilter of the combined mud cleaner by desilter sand pump, and be separated again of cyclone principle.

Solid-control-system (2)

The drilling fluid still contains a lot of harmful solid phase after passing a three-stage purifying.  When the drilling fluid is a non weighted state, we use two centrifuge in parallel to remove the harmful solid phase that is larger than 5 μm. When the drilling fluid is weighted, the use of two sets of centrifuge is needed with series connection. After separation the drilling fluid contained barites return drilling fluid purifying tank, and the harmful solids discharged outside the system and achieve the purpose of purifying and maintaining the stability of the drilling fluid performance.

Platform equipped with five levels of drilling fluid purification system equipment to ensure that the platform can meet the requirements of drilling fluid treatment in a variety of circumstances.

Development trend of drilling mud waste management

Waste drilling fluid is one of the main pollutants in the oil industry. In recent years, with the increasing demand of energy in the world, the types of drilling fluids are increasing, and the harmful components and the additives are also increasing. According to the statistics, the waste drilling fluid produced annually in our country is about 2500-3200 million cubic meters, of which the 1/2 directly discharged into the surrounding environment, the ecological damage is increasingly serious, and the harmless treatment of waste drilling fluid is imminent.Mud-system (1)

With the increase of environmental protection requirements, the corresponding treatment has been carried out in various countries. According to the different treatments and discharges between domestic and foreign, waste mud management methods are also many and varied, and the effect of each are not identical, including curing treatment method, chemically enhanced solid-liquid separation technology, mechanical dehydration method, recovery circulation and usage method, safety landfill burial etc. Technology of harmless treatment by curing process is one of the methods to be used more, but it just do the conventional treatment of inhibition and conversion to the waste drilliing fluid, the pollution of the environment is still serious by this method. And then with it, the drilling fluid mud not landing treatment process opens up a new chapter of waste mud management.