Monthly Archives: December 2021

How to Choose a Suitable Mud Tank System

Unless the old type of crude oil explorations as shown in the movie <There Will Be Blood>, in modern times, the drillings are much gentler and it takes care of environment very well. And this can attribute to the employment of solids control system. The solids control system can help to remove the solids particles generated from drilling and also return the expensive drilling fluids back to the drilling procedure

For confirming the specifications of a mud tank system, here are several steps:

1 2021.11.24 Mud Tank System

1st, to confirm the volume of mud tanks, there are several points to be taken into consideration:
1.1 the drilling structure, the drilling mud replenishment when tool is lifted or the overflow when the tool is lowered during drilling
1.2 the mud pump’s rated displacement volume.
1.3 the drilling speed of the project, especially the drilling speed of large-diameter topsoil;
1.4 the well bore’s complexity should be taken into consideration, for example, whether there is lost circulation and blowout risk, or whether it is necessary to reserve a variety of mud;
1.5 the type of drilling mud used and speed of drilling mud preparation.

2nd, How to define the minimum drilling mud volume used for oil and gas drilling.

2.1 international API method 1: well bore volume with 100 barrels added. One barrel in the US system is about 158.97 liters in the metric system, and 100 barrels is about 16 cubic meters.
2.2 international API method 2: Daily footage (well barrel volume) ‘s five or 6 times. The coefficient is usually 5.5.
2.3 international API method 3: maximum circulating capacity of mud pump multiplied by 0.618. The unit of maximum circulating capacity of mud pump is m3 / min. this calculation method mainly considers that bubbles in drilling fluid can fully overflow the liquid level, and the calculated result is the liquid level area (unit: m2).
2.4 domestic method 1 in China : well barrel volume * 1.5 ~ 2.0. with common coefficient as 1.75.
2.5 domestic method 2 in China: nominal drilling depth of drilling rig ÷ (20 ~ 22) * 130%. The common coefficient is 21.

Hope the knowledge we shared is useful for your work.

Three Oil Rig Drilling Waste Management Equipment for Nigeria Drilling Company

Just recently, GN has delivered three complete sets of oil rig drilling waste management equipment for a drilling company in Nigeria. In Nigeria and other African countries, there are strict laws to regulate the drilling activities especially when taking environment protection in consideration. In Nigeria, along with each drilling rig, there should be a complete set system for waste management, including drilling cuttings waste management and drilling fluids separation.

Drilling cuttings are mainly from the shale shaker. Shale shakers take the heaviest burden in a solids control system, removing most and largest solids particles. But there is one problem that the cuttings discharged from the shale shaker are always quite wet. The cuttings must be well treated before discharge. For one thing, if the wet cuttings are discharged directly, the chemicals on cuttings will damage the environment badly. For the other, the liquid phase on cuttings is drilling fluids, which are quite expensive. Disposal of them means disposal money.

2021.12.11 Vertical Cuttings Dryer

GN has an efficient solution to help solve those problems:

1. GNCD930 Vertical cuttings dryer. This is used for reducing the oil on cuttings, which means, to dry the cuttings before disposal. In this way, the OOC could reduce to below 0.5%. It is quite popular for oil based mud cuttings’ treatment。

2. GNLW363 Decanter centrifuge. After the vertical cuttings dryer, the liquid phase still contains lots of fine particles, and not clean enough to be return to the drilling system. In this case the high speed decanter centrifuge is used to remove the fine particles from the liquid phase discharged from vertical cuttings dryer.

3. Telescopic skids for both decanter centrifuges and vertical cuttings dryer to allow the liquid phase to fall directly to their containers

4. Feeding and conveying equipment for the GNCD930 vertical cuttings dryers and GNLW363 decanter centrifuges. In a complete waste management system, there are screw conveyors for feeding the vertical cuttings dryer and screw pumps for feeding decanter centrifuge.

In this single PO, there are 6 sets of high speed centrifuges, 3 sets vertical cuttings dryers, 15 screw conveyors and 6 screw pumps included.


35000bbl Liquid Mud Plant for International Drilling fluids Service Company

There was a big day in last week for both GN and GN’s client who purchased such a big liquid mud plant, cause all those 70 units of mud tanks were transported to the loading port from GN factory located near Beijing City. It was the repeated order from the client since he issued a trial purchase of 15 sets of tanks in last year. He was happy to see the high quality from a responsible manufacturer.

This client’s business is in field of drilling fluids service, by collecting the used drilling fluids, recycling the useful portions and getting the fluids to be well prepared for new projects. He has a huge space for storage and in need of huge mud tanks and necessary equipment for separation. GN Solids Control provides him a turn-key solution with following equipment:

6 2021.11.27 Liquid Mud Plant

1. For drilling fluids separation: client chose 3 main equipment from GN product gallery for his drilling fluids separation: GNZS594 shale shaker, GNLW452D middle speed centrifuge and GNLW363C high speed centrifuge. GNZS594 is a linear motional shale shaker with 4 pieces of shaker screens. GNLW452 is a big bowl centrifuge with middle speed, that is used for barite recovery or to choose out the particles between 5 to seven microns. And the high speed centrifuge with a rotation speed upto 3900RPM, it is for fine and extra fine particles from 2 to 5 microns.

2. If the separation equipment are used for moving out, the mixing units could be regarded the facilities for adding in. This system contains 4 sets of mud mixing hoppers with jet mud mixing centrifugal pumps for adding in the useful chemicals when preparing the drilling fluids.

3. Mud tanks for storage with a total volume 35000 bbl.

Welcome to contact directly for more information.