Monthly Archives: February 2013

slurry pump in oil field

YZ series submersible slurry pump is with structure of vertical single stage and single suction system overhung centrifugal pump , it is made of abrasion -resistant alloy , it can canconvey medium with high concentration particle .There is no bearing and Gland Seal between impeller with high concentration particle .There is no bearing and Gland Seal between impeller and pump body , so the slurry pump is maintenance free and high temperature resistance

high speed decanting centrifuge in oil field

In the early 1950 s , foreign began to applied high speed decanting centrifuge to oil drilling . It is installed in after hydrocyclone to separate the smaller particles .

Low speed decanting centrifuge in the solid control system main propose is to increase the drilling fluid system barite and solid particles throw mud and recycle them , in order to control drilling fluid density , and its economic benefits for dilution drilling fluid to control drilling fluid density method is very obvious .And high speed centrifuge treating capacity (1.5-6m/s) is little about 5 times than the low speed decanting centrifuge . And can deal with the solid particles is relatively thin , separation contain high solid concentration of drilling fluid can be a problem , so must match with low speed decanting centrifuge .

But high speed decanting centrifuge solid phase processing range is just affect drilling fluid viscosity solid phase range (1-10 um), so for the deep well to reduce the drilling fluid shear , improve the well quality and prevents the downhole accidents , high speed centrifuge effect is very good . Experimental results prove that  high and low speed decanting centrifuge use together not only can control drilling fluid density and solid content increase , and in need , also can reduce drilling fluid density and viscosity .

GLW series decanting centrifuge parameters

Model DCGLW250-980N DCGLW355-1257N DCGLW450X1258N DCGLW600X1200N
Bowl Diameter 250mm 355mm 450mm 600mm
Bowl Length 980mm 1257mm 1258mm 1200mm
Rotary Speed 3500r/min 3200r/min 3000r/min 2600r/min
Separation Factor 2607 2035 2260 2550
Separation point 2~5μm
Main Drive 11kw 37kw 37kw 45kw
Back Drive 7.5kw 11kw 11kw
Matching Pump Motor 2.2kw 5.5kw 7.5kw 11kw
Max capacity 20m3/h 35m3/h 45m3/h 90m3/h
Weight 1000kg 2950kg 3100kg 4300kg
Dimension 1900×1200 ×800mm 2900×1850×1400mm 2900×1900×1450mm 3200×1600×900mm

solids control system in oilfield

solid control equipment function is to control the drilling fluid solid content , the drilling fluid solid content increase will significantly reduce machinery drilling rate , and even cause drilling accident , make the drilling total cost substantially increased .Test shows that solid content every reduced 1% , rate of penetration at least can be increased by 10% , and the smaller particle the more influence to the drilling rate .

In the completion the drill with minimum volume of drilling fluid well eye needed , increase 50%safety volume to be drilling fluid solid control system in volume , a whole set solid control system is two times than in volume .

Choose good performance , reasonable structure design of the drilling fluid shale shaker , and according to the property of the drilling fluid choose the matched shale shaker number and shale shaker screen etc.

 

drilling fluid Jet mud mixer

Jet Mud Mixer is with solids control equipment supporting the use of the equipment , it can meet the needs of different depth of mud solid control system of drilling fluid weighted and compounding .It set up by a sand pump or many sets , a jet mixing hopper and sand pump can be combined and fission installation , aggravating hopper and sand pump is used between manifold valve connection .DC use venturi tube and the original jet nozzle combination and design of the new type of jet mud mixer , not only smple in structure , and its feasibility is strong , can meet the 1500 m to 9000 m drilling solid control system of the drilling fluid increase and preparation .At the same time also can according to the customer request to make double jet mud mixer.

when need configuration or increase the total amount of drilling fluid to change driling fluid density , viscosity ,water loss characteristics , all need drilling fluid materials ( benonite , barite powder , etc .) and corresponding chemical additives ( polymer , etc .) into circulation tank , if direct put into can cause drilling fluid materials and chemical additive a large number of precipitation or into together form , cannot obtain the scattered , evenly drilling fluid .Especially in the possible blowout emergency situation , need to be in a short time configuration a lot of weighting material , so must use auxiliary equipment to complete , namely drilling fluid jet mud mixer , Jet Mud Mixer is with the solid control system supporting the use of a kind equipment , and use it to satisfy drilling solid control system of the drilling fluid increase and configuration .

poor boy degasser used in drilling fluid

Drilling fluid liquid gas separator is gas immersion fluid degassing special equipment , the atmospheric gas category , based on the atmospheric gas principle , but it is processing gas immersion fluid primary degassing equipment , with vacuum degasser main difference is that it is mainly used to clean the annulus fluid spray out 3mm diameter was the big bubble . Big bubble is refers to the most full of hole annulus a fluid expansion gas , its diameter is about 3-25 mm . These big bubbles cause kick .Even extrusion rotary surface .In addition , the mud gas separator in mainly by gravity impact action to achieve liquid gas separation , and the vacuum degasser is to use a vacuum , turbulent , centrifugal principle , vacuum degasser treating capacity is much less than the mud gas separator , but clear gas more thoroughly . Usually after the treatment of mud gas separator the drilling fluid may also have little bubble , through the shale shaker , need to enter the vacuum degasser for the regular gas clear .

Mud gas separator can be directly from rotating blowout preventer place into liquid , also can from choke manifold outside into the liquid .Mud gas separator according to pressure points atmospheric type and pressure control type two kinds . In the past fifty years , they have been from simple open tank development to complex airtight and pressure type container . General mud gas separator with choke manifold and Flare Ignition Device supporting the use .Break away free gas from drilling fluid , can be applied to the underbalanced drilling fluid and hydrogen sulfide drilling fluid treatment .

the correct select of solid control system and equipment

Statistical analysis results show that the drilling fluid daily maintenance costs about 90% in solid control or to related issues .weighted drilling fluid . barite costs about the total material cost in drilling fluid 75%.Therefore , the right choice and use of solid control system and equipment can be a lot of clear cuttings , reduce drilling fluid and related materials and treatment of consumption , so as to obtain better economic benefit.

Solid control equipment funciton is to control the drilling fluid solid content , the drilling fluid solid content increase will significantly reduce machinery drilling rate .Test shows that solid content every reduced 1%, rated of penetration at least can be increased by 10% ,and the smaller particle the more influence the drilling rate.

In the completion the drill with minimum volume of drilling fluid well eye needed , increase 50% safety volume to be drilling fluid solid control system in volume , a whole set solid control system is two times than in volume .

Choose good performance , reasonable structure design of the drilling fluid shale shaker, and according to the property of the drilling fluid choose the matched shale shaker number and shale shaker screen etc.

Choose performance good , matching parameters reasonable desander, desilter, using tandem process , enable good remove sand and mud effect .

Choose high speed decanting centrifuge and middle speed decanting centrifuge series , in order to approve the subsequent equipment ( drilling pump, drilling rig etc) the service life , saving the mud material consumption, improve the drill speed .

drilling fluid mud cleaner

DCQJ series desander and desilter is the second and third class solids control equipments . combined desander cones , desilter cones and a underset shale shaker together , its structure is compressed , small size , powerful function , is the ideal choice of second and third class solids control equipment .

The mud cleaner can integrated a group of desander and desilter on one shale shaker , the drilling fluid firstly pass the desander or desilter for separation , with overflow returning to the circulatory system and the bottom flow screen and treated by the shale shaker .

while the mud cleaner has the higher cleaning function compared with separated desander and desilter . In addition to the reasonable design process , it equals another shale shaker .

DC mud cleaner structure is compact , it occupys small space and function is powerful mud cleaner is the ideal device to treat the drilling mud .

Mud cleaner advantages :

1. Environmently efficient-the DC mud cleaner provides efficient removal of sand and silt particles larger than 20 microns , even 15 microns ,Removing and drying drilling solids helps meet environment regulations .

2. The hydrocyclone is made of wearing-resistant special polyurethane material , which has good performance in fluid erosion resistance .The feeding port tangent smooth transition , beneficial for improved separation efficiency .

3. The desilter is distributed in a round pattern, making the cones mixer bear uniformed pressure and flow .

DC machinery is professional manufacturer of mud cleaning equipment , including shale shaker , mud cleaner , jet mud mixer , centrifuge pump , decanting centrifuge , mud agitator , shear pump , flare ignition device , mud gas separator , shear pump …HDD solids control equipment also have specifica parameters .

YZ slurry pump

YZ Submersible slurry pump structure

It is made of abrasion -resistant alloy , it can convey medium with high concentration particles .There is no bearing and Gland Seal between impeller and pump body , so it is maintenance -free and high temperature resistance , it is the ideal equipment to provide impetus for desander , desilter and centrifuge .

YZ Slurry pump is the cantilever pump structure of single stage and single suction , with the bearing housing , supporting , intermediate pipe connecting the pump hydraulic components , the water is discharged out from the drain pipe parts , pump impeller is for semi-shrouded with the agitating vane extended , the main characteristic of this pump is the underwater pump shaft parts have enough rigidity , the impeller and pump shell have no bearings , no shaft seal , which can transport the greater medium of solid particles .The length of inserting water by slurry pump is between 800 and 2000 , the suction pipe can be matched in case of need .The shaft seal runs into the underwater pump without setting up the shaft seal, drive should be installed the vertical motor on the supporting seat connecting with coupling and pump.

 

mud cleaner function in mud cleaning system

mud cleaner is the second class and the third class solids control equipment which is the newest type to treat the drilling fluid .At the same time Mud cleaner has the higher cleaning function compared with separated desander and desilter .In addition to the reasonable design process , it equals another shale shaker .DC mud cleaner structure is compact , it occupys small space and the function is powerful .Mud cleaner is the ideal device of the second class and the third class solids control to treat the drilling mud .

Mud cleaner advantages :

1. environmentally efficient

the DC mud cleaner provides efficient removal of sand and silt particles larger than 20 microns , and some as small as 15 microns .Removing and drying drilled solids helps meet environmental regulations by minimizing waste generated and reducing disposal cost .
2. High performance

Processing capacity of 1,000 gpm with the 2-12 desander and 900 gpm with the desilter concentrates solids onto a classification shaker .
3. Versatile 

The mud cleaner can be operated with the 2-12 desander ,desilter or both to process weighted or unweighted fluid systems .
4. Extends equipment life 

The mud cleaner helps minimize maintenance , repair and replacement of downstream equipment .

mud agitator JBQ series

JBQ series mud agitator is used to agitate the mud consecutively and reliably.This agitator agitates the mud to make cuttings , silt and sand pass the solids control system without being precipitated onto the tank .

The main models of mud agitator designed , developed and produced by the company are JBQ5.5 , JBQ7.5, JBQ11,JBQ15 . To keep both the mud uniformaity and the suspension of solids , the mud agitator is used to agitate the mud reliably .This agitator agitates the mud to make cuttings , silt and sand pass the solid control system .

We designed it have bellow advantages :

The reducer adopts worm or worm wheel , with tight structure , good meshing performance and reliable work .

The explosion-proof electric machine and reducer input shaft are connected through elastic coupling instead of belt transmission , and therefore the rotation speed of the wave wheel is constant .

The mixing intensity is large and the range is wide to avoid the engines overload at startup , suitable for wild field operation under poor conditions , and it is convenient to be installed , regulated or replaced .