scholarly journals TECHNOLOGY SOLUTION FOR IMPROVEMENTOF THE PDC DRILL BITS PERFORMANCE

2016 ◽  
pp. 84-87
Author(s):  
L. B. Khuzina ◽  
A. F. Shaikhutdinova
Keyword(s):  
Oil And Gas ◽  
Gas Wells ◽  
Bottom Hole ◽  
Drill Bits ◽  
Bottom Hole Assembly ◽  
Economic Indexes ◽  
Drilling System ◽  
Drill Pipes ◽  
Technology Solution ◽  
Pilot Tests

The article is devoted to the problem of bringing the desired load to the drill bit and improving the technical and economic indexes of drilling at drilling the oil and gas wells. The authors propose a bottom-hole assembly (BHA) consisting of PDC bits, downhole oscillator, screw downhole motor, measuring-while drilling system and drill pipes. The results of the proposed assembly pilot tests are presented. The tests were conducted in well No. 6053 in Sheremetyev field, Tatarstan Republic.

The development of the modeling of the BHA for directional drilling

2020 ◽  
pp. 15-23
Author(s):  
I.D. Mukhametgaliev ◽  
◽  
А.K. Agliullin ◽  
R.A. Ismakov ◽  
M.E. Loginova ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Directional Drilling ◽  
Gas Wells ◽  
Natural Form ◽  
Lower Point ◽  
Bottom Hole ◽  
Simulation Based ◽  
Oil And Gas Wells ◽  
Bottom Hole Assembly ◽  
Typical Calculation

The article discusses the development of technology for directional drilling of oil and gas wells in the perspective of modeling downhole operations. The most significant mathematical models developed by Soviet and foreign scientists in the XX century are listed. An example of calculating the reaction on a bit based on the most widely used method of initial parameters is shown. In the process of a typical calculation of the deflecting force on the bit, it was possible to set the boundary conditions on the bottom hole assembly (BHA) supports in a natural form, using a well-known approach for calculating the deflection of the beam. The obtained results of calculations were applied in the construction of a simulation model for computer simulation based on a virtual program-simulator of the drilling directional wells. The simulating software allowed us to evaluate the effect of the Zenith angle of the well and the rigidity of the oriented layout on the deflecting force on the bit, the deflection of the turbo drill along the length from the bit to the nearest lower point of contact of the well wall.

HORIZONTAL DRILLING IN AUSTRALIA: THREE CASE HISTORIES

1991 ◽  
Vol 31 (1) ◽  
pp. 354
Author(s):  
Russell McNicoll
Keyword(s):  
Oil And Gas ◽  
Design Parameters ◽  
Horizontal Drilling ◽  
Assembly Design ◽  
Oil And Gas Fields ◽  
Bottom Hole ◽  
Directional Control ◽  
Bottom Hole Assembly ◽  
Gas Fields ◽  
Drilling Time

Three horizontal wells with horizontal sections of up to 331 m were drilled successfully during the development of the marginal North Herald and South Pepper oil and gas fields, which have relatively thin oil columns (6 to 12 m) at a depth of some 1200 m sub-sea. A steerable motor system was used to maintain directional control within the design parameters. This system proved to be successful from the start and no major changes to the bottom hole assembly design were required to drill all the wells. Average drilling time including running and setting the seven inch liner amounted to 12 days. The wells were tested with rates up to 7500 BOPD through a one inch choke.

scholarly journals Dynamic Reliability Analysis of Rotary Steering Drilling System

2019 ◽  
Vol 10 (1) ◽  
pp. 79-90
Author(s):  
Leilei Huang ◽  
Qilong Xue ◽  
Baolin Liu ◽  
Chunxu Yang ◽  
Ruihe Wang ◽  
...  
Keyword(s):  
Optimization Design ◽  
Drilling Fluid ◽  
Assessment Method ◽  
Calculation Model ◽  
Drilling Tool ◽  
Dynamic Reliability ◽  
Bottom Hole ◽  
Inherent Frequency ◽  
Bottom Hole Assembly ◽  
Drilling System

Abstract. Vibration and high shock are major factors in the failure of downhole tools. It is important to study the causes of vibration and shock formation to prevent failure of the drillstring and bottom hole assembly (BHA). At present, it is generally recognized that the vibration of drillstring is the main reason for the failure, especially the lateral vibration. In this paper, the bottom tool of Rotary Steering Drilling System (RSS) calculation model was established based on the secondary development of ABAQUS software. Starting from the initial configuration of drilling tool, considering the contact impact of drilling tool and borehole wall, the dynamic excitation of guide mechanism and the drilling pressure, torque, rotational speed, gravity, buoyancy, drilling fluid damping. The dynamic characteristics of the inherent frequency and dynamic stress of the bottom hole assembly (BHA) were calculated and analyzed, and risk assessment method based on the quantitative vibration intensity was established. The reliability of typical drilling tool is evaluated, which provides a reference for the optimization design of BHA of Rotary Steering Drilling System.

Finite Element for Simulating BHA-Casing-Rock Interactions

2015 ◽  
Vol 723 ◽  
pp. 246-251
Author(s):  
Yousif E.A. Bagadi ◽  
De Li Gao ◽  
Abdelwahab M. Fadol
Keyword(s):  
Finite Element ◽  
Oil And Gas ◽  
Numerical Solutions ◽  
Oil Industry ◽  
Element Model ◽  
Additional Increase ◽  
Gas Well ◽  
Bottom Hole ◽  
Bottom Hole Assembly ◽  
Drilling Cost

The Bottom Hole Assembly (BHA) design is consider a very important subject in the planning of any oil and gas well, and any mistake in BHA design will lead to additional increase in drilling cost, due to corrections needed in well trajectory.This study was intended to predict the trajectory path, by analyzing the tendency of the BHA to build, hold, or drop the angle of inclination. The other task of this work was to measure the effect of formation strength on wellbore trajectory. In this work finite element model (FEM) results are evaluated and verified using lab data supported with results obtained from some published analytical and numerical solutions and also verified with worldwide utilized software in Oil Industry (Landmark). The FE results significantly match with tubular mechanic lab data. The BHA model permits prediction of wellbore curvature based on both BHA mechanical behavior and geological influences.

scholarly journals An Experimental Study of Flow Behavior of Coiled Tubing Drilling System

2014 ◽  
Vol 6 ◽  
pp. 935159 ◽  
Author(s):  
Feng Guan ◽  
Weiguo Ma ◽  
Yiliu Tu ◽  
Chuanxi Zhou ◽  
Ding Feng ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Partial Pressure ◽  
Engineering Practice ◽  
Straight Tube ◽  
Curvature Ratio ◽  
Pressure Losses ◽  
Coiled Tubing ◽  
Bottom Hole ◽  
Bottom Hole Assembly ◽  
Drilling System

Coiled tubing drilling has become an important development direction of drilling. The method of combining theoretical calculation with the experimental verification is adopted to analyze the flow of the coiled tubing drilling system. A set of experimental bench is developed, three kinds of curvature ratio of coiled tubing are used, and the frictional pressure losses of coiled tubing and partial pressure drop of each downhole tool are tested. The results of experiments with water agree well with rough pipe calculation model. The pressure losses of coiled tube are obviously larger than that of straight tube, and the value of it is about 11–17%. The larger the curvature ratio is, the more the pressure losses of coiled tubing are. The fluid experiment with the polymer presents obviously the drag reduction effect. Experiment of simulated bottom hole assembly shows that partial pressure drop of bottom hole assembly is large. It has a little effect on the pressure losses of coiled tubing when whole bottom hole assemblies are connected. The research results can be used as the basis for formulating coiled tubing drilling process parameters, which will provide a guide for engineering practice.

EVALUATION OF OCCUPATIONAL RISKS IN ROUNT-TRIP OPERATIONS WHEN DRILLING OIL AND GAS WELLS

2017 ◽  
pp. 115-122
Author(s):  
R. R. Shangareyev
Keyword(s):  
Risk Factors ◽  
Injury Risk ◽  
Oil And Gas ◽  
Round Trip ◽  
Gas Wells ◽  
Occupational Risks ◽  
Production Factors ◽  
Oil And Gas Wells ◽  
Drill Pipes ◽  
Injury Risk Factors

The article presents the analysis of occupational risks when performing round-trip operations during drilling oil and gas wells and provides simple and easy-to-understand methods of occupational risk management. It considers the main negative production factors which harm the health of workers when performing operations on lifting and lowering the drill pipes with the description of mechanical injury-risk factors.

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