Drilling Mud Equipments Selection -- GN Solids Control

Nov. 8, 2009 - PRLog -- Well team used solid-phase control of the circulatory system devices the status quo, there is a brief analysis of the problem description, then presents Jianghan Oilfield drilling fluid purification equipment selection and configuration recommendations.

Company site: http://www.gnsolidscontrol.com
Drilling for oil drilling project in an indispensable and important component of the relationship between the one hand, the safe, fast, high-quality drilling, on the other hand the relationship between the oil and gas layer protection. According to the actual work needs, provides a series of drilling fluid performance parameters, as the adjustment and control of drilling fluid performance basis. Solid content drilling fluid is one of the performance parameters, drilling fluid, solid-phase typically include sand, poor soil, debris, bentonite, barite, etc., solid-phase control purposes is to remove hazardous solid phase ( debris, sand, poor soil), preservation useful in solid phase (barite, bentonite), and only a variety of solid-phase content in a reasonable range performance to stabilize the drilling fluid, drilling fluid in order to play its due function. More solid-phase control method, in which mechanical separation applications common, the law used in the process of applying the rational allocation of drilling fluid purification equipment will effectively improve the performance of drilling fluid and thus play a drilling fluid functions and improving the drilling Well-effectiveness. The following combination of areas 13 Jianghan Jianghan Oilfield drilling fluid, drilling crew purification equipment to conduct a brief analysis of the status quo and to make fluid purification equipment configuration recommendations.
1, drilling mud solids control equipment status
Jianghan Oilfield Jianghan region's existing 13 drilling crew (including the Songzi 32810 Team), teams and the use of drilling fluid purification device configuration is shown in table 1, the table is not listed devices except mud situation, because the region is only 50630 Jianghan team 50631 force two devices to configure except mud, the rest of the team is not equipped.
From Table 1 we can see that the drilling crew Jianghan region are used in drilling fluid purification equipment: vibration sieve There are three models, respectively ZS2 × 1.15 × 2/3P low-frequency, DHL-1 high frequency, QGZS-G4 Ⅱ type ; Desander There are three models namely NCS-300 × 2 type, ZQJ-250 × 2 type, ZCSQ-250 × 2 type; In addition there are two kinds of sand pump, model SB-200 model, respectively, SB-6 " × 8 "type; centrifuge There are four models, respectively LW450 × 1000-NJ-type, LW450 × 842-N-type, LW600-945N model, LW450 × 1000-N-type.

http://www.gnsolidscontrol.com/decanting-centrifuge/

2, drilling fluid purification equipment, analysis of the situation and existing problems
From those listed in Table 1 we can see that drilling crew fluid purification equipment Jianghan region compared to last year (see the 2001 Technical Series, "Drilling Fluid purification equipment use and management"), update faster. High-frequency vibrating screen, the new Desander, high-frequency large-capacity centrifuge and the general configuration used in the drilling operations in solid control of the circulatory system play an important role.
(A)Drilling mud Equipment Analysis
1, drilling mud shale shaker
We can see from Table 1: In the 13 wells teams have five wells teams ZS2 × 1.15 × 2/3P the use of low-frequency screen, two wells teams using QGZS-G4 Ⅱ high frequency screen, six wells teams using the DHL-1 type high-frequency screen. Accounted for using the number of high-frequency screen 61.5%, compared with last year have more greatly enhanced. One QGZS-G4 Ⅱ high-frequency screen for the newly introduced, are used in good condition.
2, drilling fluids Desander
We can see from Table 1: In the 13 wells teams have five wells teams using the NCS-300 × 2-type Desander, two wells teams using ZCSQ-250 × 2-type Desander, six wells teams using the ZQJ-250 × 2 type Desander; accounted for using the number of 38.46% and 15.39%, 46.15%. Compared to last year, not the magnitude of changes, only to add two new Desander use.
3, in addition to sand pump
We can see from Table 1: The team of 13 wells in a total of 12 teams use the SB-200 wells electric sand pump, a well teams using the SB-6 "× 8" electric sand pump. Compared with last year, out of the belt transmission-type sand pump at the same time, the introduction of a new type of mechanical seal type sand pump.
4, drilling mud decanter centrifuge
After many years of practical use and continuous upgrading of the centrifuge has been raised from a variety of models of multiple manufacturers into a relatively neat two manufacturers of the three models (which LW450 × 1000-NJ-type centrifuge at the end of March 2003 to replace eliminated); separation factor reached 800 or more, speed at 1800r/min above Sand more capable, Sand better, but also to facilitate equipment maintenance and management.
(B) Analysis of the Problems
Improve the performance of fluid purification equipment to improve the penetration rate and reduce drilling costs, thus contributing to improved drilling efficiency. However, existing purification equipment, there are still some problems affecting the use of equipment, specifically as follows:
http://www.gnsolidscontrol.com/shale-shaker/
1, vibration sieve
Jianghan areas now use DHL-1-type vibrating sieve are self-excitation type, QGZS-G4 Ⅱ type vibrating sieve belongs to strong vibration mode, both of which belong to high-frequency linear screen, Sand effect is better, but there are also some problems. DHL-1-type vibrating screen design flaws in the structure now used by six units vibrating sieve screen frame are different levels within a year, the emergence of cracks, since the electrical excitation has also broken five units, affecting the team's use of wells. Also, because there is easy to drain Jianghan region strata, drilling crew drilled encountered during the construction of this formation, the need to increase the drilling fluid plugging agent, this time, there are two kinds of high-frequency linear sieve paste screen phenomenon, well Team had to drilling directly into clean pot, so that not only affects the Sand effect, also increased after several stages of purification equipment burden.
2, Drilling fluids Desander
Jianghan area, now available in three models Desander Sand effect that far from all the main problems is that the nozzle is not easy adjustment, Sand effect by the proportion of drilling fluids, viscosity and other great influence; swirl scoop, swirl tube easy to wear, replace the inconvenience and increased use of cost.
3 Centrifuge
Centrifuge separation factor is now used by the higher speed faster, Sand works well, but the attendant wear and tear is also great, right screw conveyor coating demand is also high. The existing centrifuge screw conveyor of the spray technology is not yet cross the border, spraying inconsistent quality, affecting the use of centrifuges. In general, the centrifuge in use for more than half a year, Sand effect a downward trend, the use of one year after the majority of the need for repairs, can only continue to be used.
4, in addition to sand pump
In addition to sand pump in use there are two major problems: First, a serious leakage, sealing quality, not up, second is no pressure regulator body can not make Desander to play the best performance.
Third, fluid purification equipment configuration and selection of
With the drilling of new technology development, drilling fluids have become increasingly demanding purification equipment, purification equipment, configuration and selection is appropriate, as a new task.

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