Dec 25

The general information

As we know presently drilling fluids solids control system  is rather important to well drillings. How to configure the equipments and the exact position of each device is the key. If the equipment hold very excellent capacity but without appropriate position will decrease its half effect, while some equipments will be useless.

Drilling fluids system configuration

Drilling fluids system configuration

If the solids control equipment doesn’t have good property or don’t have ideal configuration then the solids in drilling fluid will increase. At this occasion we must use quantities of chemicals to dilute drilling mud, then we have invested much unnecessary cost and it is easy to happen complicated situation in the well bore.

The recycling tank in fluids system

Solids control system should be the equipments combined with recycling tanks. So the recycling tanks is the key parts in solids control system

Drilling fluids tank is used to store, configure, recycle and process the drilling fluid. Its capacity should cater to the largest circulation capacity during the weell drilling as well as the sufficient storage capacity.

Usually we’ll make it as many separated mud containers. Nowadays most manufacturers make the tanks with compartments. If there is no compartment they will make circle pipe to balance  and transfer dirlling fluids between tanks this will leave the fluids at the same level when it is still

Commonly speaking, if we drill a well deep 3200m, the recycling tanks capacity should be not less than 165CBM, and the sotrage tank should be not less than 80CBM, every recycling tank should be 7×2.5x2m=35CBM.

If drill a well deep 4500m, then the recycling tank should be not less than 200CBM, and the sotrage tanks should be not less than 120CBM, and every recycling tank should be 8×2.7×2.1m=45CBM.

For 6000m~8000m well we need drilling fluids tank be not less than 270CBM, and storage tank should be not less than 160CBM. One point, the silting tank should be not too short, at least provide sufficient space for fixing three shale shakers

Drilling fluid solids control equipment

Drilling fluid solids control equipment

The normal incorrect configuration on solids control equipments in drilling fluids

Drilling fluids after processed will be expelled  into upper stream of the suction tank. If the overflow of desander and desilter flow into the tank above the pump sution then the desander and desilter can only process 50% drilling fluids come from the well head but the other half flow make the round of them.

There is also manufacturer make centrifugal pump suction and overflow position in the same tank. This will make the fluids as a small circulation and the fluids system will have nearly0% treating capacity.

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Aug 26

Different Shale Shakers Work in Various Systems

GN Shale Shaker Comments Off on Different Shale Shakers Work in Various Systems

Brief introduction

Shale shaker is first stage solids control equipments. In order to satisfy various system treating requirements there must be relative shale shaker to realize many customization design

Different industry and different drilling conditions require variable mud system configuration and customized design on certain items. Such as Shale shaker,in Oil well drilling mud system and HDD Mud recycling system can be said totally different. Please find following information for shale shakers work in different systems

GNZS63-3 Linear motion Shale Shaker

GNZS63-3 Shale Shaker

Different drilling rigs

Firstly, divided by usage, there will be Oil well drilling rigs, HDD rigs, Water well drilling rigs, Geothermal well drilling rigs, other civil construction rigs. Furthermore, oil drilling rigs including drilling rigs and work over rigs. And work over rigs will be divided in to 350HP, 450HP, 550HP rigs.

Then divided by mount ways, there will be mounted drilling rigs, Mobile drilling rigs or Truck mounted drilling rigs. If divide drilling rigs according to drilling depth, there will be ZJ20, ZJ30, ZJ40, ZJ50, ZJ70, even ZJ90. The ZJ”x”0 means “x” Kilometer it can drill.

Except aboving division methods, rigs also can be identified by Horse power of the rotary lift force. So there are 650HP, 750HP, 1000HP, 1500HP, 2000HP, 3000HP drilling rigs.

Drilling mud systems capacity for various rigs

ZJ20 or 650HP drilling rig matched 90-100M3/h mud systems. For ZJ30, ZJ40, until ZJ70 the mud system treating capacity will be 120-130M3/h, 180-200M3/h, 200-240M3/h, 270-300M3/h. Work over rigs mud system including 350HP, 450HP, 550HP. And treating capacity will be 90-100M3/h.

Infact, ZJ20 mud system contains similar configuration on solids control equipments. Such as GNZS83-2 Shale shaker, GNZJ83-2 Mud cleaner, Decanter centrifuge, Mud mixing pump, Mud agitator, and Mud tank lengs 10m. For ZJ30, the main parts are 2 sets GNZS63-3 Shale shakers, GNZJ63-3 Mud cleaner holds Desander cones 10″x2, while Dsilter cones 4″x10. Then also the LWF450x842N Decanter centrifuge, Mud mixing pump, mud agitators, and tanks.

XJ550HP Mud System

XJ550 Mud System

For other drilling mud systems treating capacity you can refer to GN Solids Control website. You can get sufficient information on quantities system and equipments. Including work over rigs mud system, HDD mud system, Oil drilling mud system, etc.

Shale sahkers performance on variable mud system

GNZS83-2 shale shaker is linear motion shale shaker holds about 80M3/h treating capacity, that means about 352GPM. It holds 2 shaker screens. The screen area come to 1.8M2 or 9.5ft2. GNZS83-2 can be used in work over drilling rigs mud system, shallow oil well drilling, such as ZJ20 rigs, as well as 100t HDD mud system.

GNZS63-3 Shale shaker is another linear motion shaker designed by GN. It holds about 120M3/h treating capacity. It holds 2 shaker screens. The screen area comes to 2.4M2.

The shaker screen is 630x1250mm. It is same with NOV Brandt shaker screen so it can be replaced by NOV Brandt shaker screen. Also it is the quick replacement type for saving much time. GNZS63-3 Shale shaker usually used in ZJ30 mud system, also 200t, 300t, 450t HDD mud systems.

GNZS83-3 Shale shaker is rather popular shale shaker either as separated equipment or a part of mud system. 83-3 holds about 140M3/h treating capacity.

And it has 3 shaker screens as 830x1080mmx3 the shaker screen area will be 2.7M2. The shaker screens are same with 83-2 Shale sahker all of them can be replaced by each other. And the types can be soft hook strap, PWP, and PMD type. Continue reading »

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Jul 03
Brandt King Cobra, Swaco Mongoose and GN shale shaker

Brandt King Cobra, Swaco Mongoose and GN Shale shaker

Nowadays, Brandt King Cobra , Swaco Mongoose Shale Shake are widely known as top solids control equipments all over the world. GNZS Shale shaker also have been accepted by more and more oil&gas, HDD, etc well drilling related industry. Following are some info on Brand King cobra, Swaco Mongoose, and GN shale shaker.

GN Solids control updates many items model number and a few parameters, make the whole system more easy understanding and compact. GNZS Shale shaker is new model of former ZS Shale shaker from GN solids control, mainly including 4 common models. However, the shale shakers can be customized according to clients’ requirement

Swaco and Brandt are both well known all over the world. They are specialist on solids control in many industry such as oil and gas well drilling, HDD, civil industry, mining industry, etc. Swaco Mongoose and Brandt Cobra Shale Shakers have much difference specifications, such as shaker screen, dimension, treating capacity. And these features results their different strength on various aspect.

GNPS Elliptical balanced shale shaker

GNPS Elliptical balanced shale shaker

GN Shale shakers

Presently, GN produces both linear motion shaker and balanced elliptical shale shaker. Following one is fourth generation of shale shaker—Balanced elliptical motion shale shaker from GN. Furthermore, for the balanced elliptical shale shaker from GN also maybe designed according to customers’ specific requirements if necessary

GNPS Shale Shaker Technical Parameters

Model GNZS83-3 GNZS63-3 GNZS70-3 GNZS83-2
Vibrating Mode Linear motion Linear motion Linear motion Linear motion
Motor Power 2×1.8/1.72KW 2×1.5KW 2×1.5KW 2×1.3KW
Vibrating Strength ≤7.0G(Adjustable) ≤7.0G(Adjustable) ≤7.0G(Adjustable) ≤6.5G
Double Amplitude 5.5~6.0mm 5.5~6.0mm 5.5~6.0mm 5.5~6.0mm
Treating Capacity 140m3/h

615GPM

120m3/h

528GPM

120m3/h

528GPM

80m3/h

352GPM

Deck Adjustment -1°~5° -1°~5° -1°~5° 0°~3°
Power 380V/50HZ,460V/60HZ
Screen area 2.7m2 2.4m2 2.2m2 1.8m2
Shaker Screen 830×1080mm×3

(40~250meshes)

630×1250mm×3

(40~250meshes)

700×1050mm×3

(40~250meshes)

830×1080mm×2

(40~250meshes)

Weight 1880kg 1680kg 1580kg 1300kg
Remarks Treating capacity test from mud:1.2g/cm3density & viscosity 45s & 40 mesh screen

For treating the oilfield drilling fluids, the balanced elliptical motion shaker is 20%-30% bigger than linear motion shaker, discharging speed is 10%-20% faster;For resisting the “screen stuck”, “screen paste” “horseshoe effect” ,the balanced elliptical motion shale shaker is much more effective.

King Cobra and Mongoos Shale Shaker Continue reading »

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