[PDF] [PDF] MASTERS THESIS - CORE

[PDF] Drill String Design

Drill String Design The following Used to transmit rotation and weight to bit via drill pipe and drill collars Calculated based on drill string length and drill pipe

[PDF] The Drill-String 03 - King Petroleum Service ltd

When selecting the drill-pipe, the maximum tensile load that the string could be subjected to will have to be considered In addition to the design load calculated on 

[PDF] 2 This is an OPEN BOOK EXAM

Drill collars: 6 in by 2 in, 100 lb/ft, the length of the drill collar is 10 of the total Use safety factor 2 for your design calculations wherever it is applicable

[PDF] MASTERS THESIS - UiS Brage - Unit

to consider in more detail the calculation of loads on the drill string and take into issue namely design of light alloying drilling string for ultra deep drilling

[PDF] Drill String - Ocean Drilling Program

drill pipe to reduce bending stresses in the guide horn Design Features 1) Large Internal Diameter/ Compatibility All the elements in the drill string

[PDF] torque and drag applications for deviated - METU

1 déc 2014 · torque and drag calculations while drilling deviated wells Keywords: Torque 3 4 Torque and Drag Consideration in Drill String Design Torque types are studied well in the manual published by K&M Technology Group,

[PDF] MASTERS THESIS - CORE

Title of thesis: Heave effects on Drill String during connections UiS Numerical Model to calculate swab and surge pressures due to heave movement 28 Therefore, as a step forward designing control schemes to actively attenuate the http://www searchanddiscovery com/documents/2011/40796shaker/ ndx_shaker pdf

[PDF] DDCAP Technical Manual for Drilling Works for Technical Support

Table 29 Weight Calculation of Drill String Assembly for 12-1/4” x 30 m Source: Design Manual for Water Supply and Wastewater Disposal (MoWI, 2009)

[PDF] drill string design example

[PDF] drinking before accutane blood test

[PDF] drinks in 750 ml wine

[PDF] drip for high blood pressure

[PDF] drivers license with out of state address

[PDF] driving a passenger vehicle 2019 pdf

[PDF] driving directions to ace hardware near me

[PDF] driving hours for truck drivers

[PDF] driving in geneva

[PDF] droidcam

[PDF] droidcam wireless webcam

[PDF] droit de l'homme

[PDF] droit de la personne québec

[PDF] droit du travail pdf

[PDF] droit et liberté de la personne québec

Heave effects on Drill String during connections

Page i

Faculty of Science and Technology

Study program/ Specialization:

M.Sc. Petroleum Engineering

Drilling Engineering

Spring semester, 2012

Open access

Writer:

Marco Antonio Céspedes Guzmán

Faculty supervisor:

Prof. Erik Skaugen University of Stavanger

External supervisor(s): None

Title of thesis: Heave effects on Drill String during connections.

Credits (ECTS): 30 ECTS

Key words: Heave, drill string, friction,

connections, swab/surge, bit movement, wave period, well path, deviation, numerical method, compensated drill floor, kick-loss, and narrow drilling window.

Pages: 125

+ Appendices: 31

Stavanger, 15th June 2012

Heave effects on Drill String during connections

Page ii

Abstract

During the make-up and break-out of the connections, the drill string is wedged in the rotary table and the top of the drill string follows the platform heave movement as the bit is off bottom. This oscillation may be transmitted down the string and produce pressure fluctuations around the

string, especially at the bottom of the string due to the small clearance between BHA and

borehole. This can cause high surge and swab pressures that may lead to undesired loss of circulation or influx of formation fluid. This thesis presents a numerical method developed at the University of Stavanger (programmed

in MatLab), for calculating the behavior of elastic drill strings when exposed to the forced

movement at the top (platform heave movement). The method is restricted to treating only one- dimensional waves, travelling along the string axis. It considers all the elastic effects and some

of the effects of friction, such as contact friction and viscous friction inside the drill string. The

down hole oscillations of the drill string drill bit and the pressure fluctuations below the bit were

calculated, assuming that the pressure is generated by forcing the mud to flow up and down the annulus as the bit moves down and up, respectively. The basic G+ROGquotesdbs_dbs20.pdfusesText_26