Structural Design for Oil Well Pump with Soft Sealing and Small Diameter Piston

2013 ◽  
Vol 655-657 ◽  
pp. 359-364
Author(s):  
Wen Hui Yan ◽  
Ping Gao ◽  
Yong Chen
Keyword(s):  
Small Diameter ◽  
Control Technique ◽  
Low Permeability ◽  
Oil Well ◽  
Working Process ◽  
Daily Production ◽  
Maintenance Cycle ◽  
Sealing Ring ◽  
Soft Seal ◽  
Selection Of

For the low pumping demand of daily production per well of low permeability oilfield, a diameter of 25mm soft sealing small diameter piston-type subsurface pump is designed, and an external traveling valve to ensure that the valve still application of standard parts is adopted, while reducing the pump barrel diameter. In order to solve the problems of pump leakage increasing with wear, automatically compensate for soft seal ring is adopted in piston design. The liquid pressure of the pump barrel is changed in the pump working process, so that the sealing ring is deformed outwardly. When the pump reaches the upper stroke, the gap between the pump barrel and the piston reduced, and further improve the sealing effect. The innovation of structure and the selection of new materials can reduce the difficulty of pump processing, as well as can extend the maintenance cycle. This paper introduces the overall structure and sealing characteristics of soft sealing small diameter piston-type subsurface pump. If the soft sealing small diameter piston-type subsurface pump and real-time variable frequence control technique of pumping unit combined, a more reasonable machine rod pump combination can be provided to achieve ultra-low permeability oilfield stripped well efficiently pumping.

ASSESSMENT OF OIL WELL PRODUCTIVITY IN LOW-PERMEABILITY RESERVOIRS IN THE FIELDS OF EASTERN SIBERIA

2017 ◽  
pp. 30-36
Author(s):  
R. V. Urvantsev ◽  
S. E. Cheban
Keyword(s):  
Oil Recovery ◽  
Large Scale ◽  
Oil And Gas ◽  
Oil Extraction ◽  
Low Permeability ◽  
Oil Well ◽  
Eastern Siberia ◽  
Development Costs ◽  
Traditional Fields ◽  
Low Permeability Reservoirs

The 21st century witnessed the development of the oil extraction industry in Russia due to the intensifica- tion of its production at the existing traditional fields of Western Siberia, the Volga region and other oil-extracting regions, and due discovering new oil and gas provinces. At that time the path to the development of fields in Eastern Siberia was already paved. The large-scale discoveries of a number of fields made here in the 70s-80s of the 20th century are only being developed now. The process of development itself is rather slow in view of a number of reasons. Create a problem of high cost value of oil extraction in the region. One of the major tasks is obtaining the maximum oil recovery factor while reducing the development costs. The carbonate layer lying within the Katangsky suite is low-permeability, and its inventories are categorised as hard to recover. Now, the object is at a stage of trial development,which foregrounds researches on selecting the effective methods of oil extraction.

Comparison of Controllers for a UAV with Integral Effect and Kalman Estimator: By Bessel Polynomials and LQR

2013 ◽  
Vol 436 ◽  
pp. 54-60 ◽  
Author(s):  
Wenceslao Eduardo Rodríguez ◽  
Ramiro Ibarra ◽  
Gerardo Romero ◽  
David Lara ◽  
Jaime Arredondo ◽  
...  
Keyword(s):  
Steady State ◽  
Pole Placement ◽  
Control Technique ◽  
State Estimator ◽  
Control Laws ◽  
State Response ◽  
Integral Effect ◽  
Aerial Vehicle ◽  
Pole Placement Controller ◽  
Selection Of

This paper presents the development of two different control techniques as an approach having to remove steady-state error present in the response of attitude of a mini unmanned aerial vehicle. A problem that arises when performing pole placement controller is the selection of the poles, the Bessel approximation allows the selection of the eigenvalues in function to a specified response time for a feedback pole placement controller and state estimator (observer). On the other hand presents an optimal control technique combined with Kalman filter to estimate the state affected by perturbations in the system, both cases using the integral effect to eliminate the steady state error.These two control laws has the property of responding to a desired response according to a time or state response desired.

Co Flooding Lifting Technology in Oil Well with High Gas-Oil Ratio in Low Permeability Oilfield

2013 ◽  
Author(s):  
Feng Wang ◽  
Ruo Sheng Pan ◽  
Dongmei Ma ◽  
Yingan Zhang ◽  
Guojun Yin
Keyword(s):  
Low Permeability ◽  
Oil Well ◽  
Gas Oil

scholarly journals 3D-Dynamic Modelling and Performance Analysis of Service Behavior for Beam Pumping Unit

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Feng Zi-Ming ◽  
Tan Jing-Jing ◽  
Sun Yanan ◽  
Zhang De-Shi ◽  
Duan Wei-Bo
Keyword(s):  
Partial Differential Equations ◽  
Performance Analysis ◽  
Dynamic Model ◽  
Dynamic Modelling ◽  
Oil Well ◽  
Working Process ◽  
Pumping Wells ◽  
Torque Curve ◽  
Service Behavior ◽  
And Performance

In consideration of the rod, the tube, and the liquid column, a 3D dynamic model was established, which could be expressed as a set of partial differential equations. A measured torque curve and a calculated torque curve of Nan1-2-22 oil-well in Daqing oilfield were contrasted with each other which improved the rationality of this model. At last, we researched the influence of the stroke and the frequency of stroke on the displacement of rod, suspension velocity, suspension acceleration, polish rod load, and net torque of gearbox. This 3D dynamic model has a higher calculated accuracy and veracity and could be used to design and optimize the structure of rod pumping and the working process of pumping wells.

THE VALUE OF INTEGRATING BOREHOLE RESISTIVITY IMAGES WITH GEOLOGICAL DATA: RELEVANCE TO HYDROCARBON EXPLORATION

1997 ◽  
Vol 37 (1) ◽  
pp. 301 ◽  
Author(s):  
B. E. J. Messent ◽  
C.M. Yacopetti
Keyword(s):  
Poor Quality ◽  
Depositional Environments ◽  
Hydrocarbon Exploration ◽  
Qualitative Assessment ◽  
Low Permeability ◽  
Geological Data ◽  
Close Proximity ◽  
Potential Reservoir ◽  
Low Permeability Reservoirs ◽  
Selection Of

This paper outlines the contribution borehole resistivity images can make in a frontier exploration program when they are integrated with all available geological data. Specific examples are given from the Duntroon Basin.Dipmeter data and borehole resistivity images can be used to validate seismic structural interpretations. An example is given to show the comparison in interpretation of the different methods.Faults are identified on the borehole images and in addition, qualitative assessment of sealing potential can be made by determining the occurrence and extent of mineralisation. In Greenly-1 the hydrocarbon shows, which are interpreted as migrated hydrocarbons, are found In close proximity to faults identified on borehole images. It is postulated that the faults acted as a conduit for the migrating hydrocarbons. However, these fault planes are now mineralised and interpreted to be sealing. This interpretation is supported by the presence of isolated, over-pressured sandstones.Resistivity images readily identify the orientation of present day horizontal stresses with its implications for fault-trap integrity. However, this is not deemed to be an issue in the Duntroon Basin as there is evidence that at least some of the faults are sealing. Borehole images can also be used to assess caprock integrity by determining the presence or absence of fractures.Within potential reservoir units, borehole resistivity images assist in the interpretation of depositional environments, reservoir geometries and post-depositional changes which affect reservoir quality.Borehole resistivity images provide qualitative interpretations of permeability. It is therefore possible to use the images in the selection of pre-test seats and sampling points in poor quality boreholes or low permeability reservoirs.

Method of Testing the Mechanical Properties of Vulcanizates Prepared from Latex as a Starting Material

1948 ◽  
Vol 21 (1) ◽  
pp. 168-179
Author(s):  
Marcel Pirot
Keyword(s):  
Mechanical Properties ◽  
Starting Material ◽  
Daily Production ◽  
Selection Of

Abstract With the method which has been described, it is possible to obtain reproducible results easily. It is hoped that the method will make it easier to study the properties of rubber mixtures prepared from latex. Furthermore the quantity of a latex mixture needed for such a test is small, i.e., of the order of 400 cc., so the method is particularly well adapted to the selection of Hevea trees on a basis of the quality of their latex. As a matter of fact, it will be easy in many cases to follow the collection of latex from a limited number of trees. It should even be possible, by using a single dipping form and reducing the size of the dipping tank, to follow the quality of the latex from the daily production of one tree, a procedure which is impossible with coagulated rubber.

scholarly journals Influence of Migration and Plugging of Nanoparticles on Coal Permeability in Coal Reservoirs

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Xiaopeng Zhai ◽  
Weihong Chen ◽  
Yun Xu ◽  
Yishan Lou ◽  
Shuhong Xu ◽  
...  
Keyword(s):  
Pressure Difference ◽  
Coalbed Methane ◽  
Pressure Oscillation ◽  
Working Fluid ◽  
Low Permeability ◽  
Coal Permeability ◽  
The North ◽  
Theoretical Support ◽  
Coal Reservoir ◽  
Selection Of

The plugging of nanopores in low-permeability coal reservoirs is an important factor that affects productivity reduction. However, the mechanism of plugging of the nanopores in coal reservoirs remains unclear. In this study, the coal samples from the Anze coalbed methane block of the North China Oilfield are used as the research object. Experiments are conducted on the mechanism of nanopore plugging by the variation of nanopore permeability based on the pressure oscillation method and the nanopore (scanning electron microscope) method. The research shows that the foreign working fluid invades a coal sample; the sample changes from being hydrophobic to being water absorbent within a certain period. The instability caused by the expansion of coal clay mineral particles promotes the dispersion and shedding of particles, and the migration of particles is accelerated under the shear stress of the working fluid. In addition, the viscosity and pressure difference of the working fluid are important factors that affect particle plugging. The viscosity of the fluid increased by two times, and permeability decreased by 1.21 times. As the pressure difference increases by two times, permeability can be reduced by up to two orders of magnitude. The findings of this study can help for better understanding of the mechanism of plugging of the nanopores in coal reservoirs and the reasons of production reduction in low-permeability coal reservoirs. Such findings provide theoretical support for the selection of the working fluid, and reasonable production pressure difference can effectively reduce the damage on coal permeability in a low-permeability coal reservoir.

scholarly journals Agro Expert Using Google API

2021 ◽  
Vol 10 (5) ◽  
pp. 1-4
Author(s):  
Kale Adika Hiralal ◽  
Pansare Sayali Ashok ◽  
Wagh Monika Sunil ◽  
Said Shubhangi K.
Keyword(s):  
Climate Change ◽  
Soil Moisture ◽  
Collaborative Filtering ◽  
Pest Control ◽  
Early Stage ◽  
Control Technique ◽  
Filtering Algorithm ◽  
Prediction Technique ◽  
Collaborative Filtering Algorithm ◽  
Selection Of

Agriculture is the backbone of Indian economy. Mostly crops are loss due to the erroneous selection of the crop, climate change. The farmers are generally not aware of the requirements of the crops. i.e. The minerals, soil moisture & other soil requirements one more problem that a farmer generally encounters is the pest & diseases that can affect the crops they grow which they are generally unaware of in an early stage. This are the problems of farmer is addressed in our paper and we have tried to solve it with the help of Agro Expert using Google API system by the help of our model. We predict the suitable crop to the farmers and also detect the pest and may affect as suggest the pest control technique. In this paper we have applied collaborative filtering algorithm, aprori algorithm, linear regration prediction technique.

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