Results 31 to 40 of about 9,449 (231)
Drilling String Vibration: Modelling and Simulation
The offshore industry has a significant impact on the global economy and it is expected to grow over the next 4 years. A crucial part of an offshore structure is the drill string. Drill strings can be seriously damaged by vibration during drilling operations. The control of vibrations in drill strings is essential.
Amat, Sergio +2 more
openaire +2 more sources
Vibration Characteristics Study of Drill String Based on Rotary-impact Drilling Tool in Horizontal Well [PDF]
To address the problems of large drilling friction and low rate of penetration (ROP) in the drilling process of horizontal well, the vibration characteristics research of drill string is conducted on the basis of rotary-impact.
Jialin Tian +3 more
doaj +1 more source
Analysis on Drill String Vibration Signal of Stick Slip and Bit Bouncing [PDF]
In drilling engineering, drill string premature damage are frequently observed, resulting in drilling cost and cycle prolonged. Researches show that, the common phenomenon of drill string vibration is the main cause of premature damage, thus more and ...
Huaigang, FU, Peili, LI, Weiqing, QIU
core +2 more sources
In deepwater riserless drilling system,drill string in seawater is affected by external ocean load,torque of top rotary table and bottom bit-formation force,so it is prone to vibrate in the three directions of longitudinal,transverse,and torsional,making
Liu Jun +3 more
doaj
Analysis of Drill String Coupled Vibration and Drilling Fluid Pressure in Downhole Section
To address the problem of nonlinear coupled vibration of the drill string in the axial, lateral and torsional direction in the downhole section of deepwater drilling, a mathematical model of nonlinear coupled vibration of the drill string in the downhole
Liu Jing +5 more
doaj
MINIMIZING DRILL STRING TORSIONAL VIBRATION USING SURFACE ACTIVE CONTROL [PDF]
LEONARDO DIAS PEREIRA
openaire +2 more sources
The impact of vibration mechanism’ installation place on the process of retrieving stuck drill pipe [PDF]
Purpose. The present paper studies the dependence of the dynamic oscillatory movements in the area of drill string sticking on the parameters of vibrating mechanism and place of its installation in the heavy weight drill pipe.
Levchuk, K, Moisyshyn, V
core +2 more sources
Vibration and Control Characteristics of Downhole Drill String System
Stick slip vibration seriously affects the life of drill string system,prolongs the drilling cycle,and endangers the safety of staff.In order to solve the problem of stick slip vibration caused by linear torque load and friction load in drilling ...
Ma Sunan +6 more
doaj
Modelling of deep wells thermal modes [PDF]
Purpose. Investigation of various heat-exchange conditions influence of the tower liquid on the deep wells thermal conditions. Methods. Methods of heat-exchange processes mathematical modeling are used.
Blyuss, B +4 more
core +1 more source
A parametric study for the design of an optimized ultrasonic-percussive planetary drill tool [PDF]
Traditional rotary drilling for planetary rock sampling, in situ analysis, and sample return are challenging because the axial force and holding torque requirements are not necessarily compatible with lightweight spacecraft architectures in low-gravity ...
Harkness, Patrick +4 more
core +1 more source

