SPE SAMPLE Abstract NEW
[Pages:1]
SPE
SAMPLE
Abstract
Submission
TITLE:
Dynamic Model for Stiff String Torque and Drag
1. OBJECTIVES/SCOPE:
Please
list
the
objectives
and
scope
of
the
proposed
paper.
(25--75
words)
A stiff string torque and drag model is presented that uses steady state dynamic equilibrium of the drillstring as its basis for calculations. Results are compared to previously published T&D models that are based on static equilibrium.
2. METHODS
PROCEDURES,
PROCESS:
Briefly
explain
your
overall
approach,
including
your
methods,
procedures
and
process.
(75--100
words)
The new approach is based on a 3D transient dynamic model of drillstring and BHA in an elastic borehole. It considers bending stiffness, torsional stiffness, contact forces and friction with localization of contact points. A numerical method description is provided that has proven to have high stability. Complete governing equations are provided and the method is described in detail to permit readers to replicate all results.
3. RESULTS,
OBSERVATIONS,
CONCLUSIONS:
Please
describe
the
results,
observations
and
conclusions
of
the
proposed
paper.
(100--200
words)
The dynamics model is compared to three static stiff string models that are published or commercially available. Comparisons are also provided for three conventional soft string models including the LubinskiPaslay-Cernocky bending stress magnification factor. Four field case studies are presented for horizontal wells. Two wells are short radius with dogleg severity over 50 deg per 100 ft and two wells are shale gas wells with doglegs up to 15 deg per 100 ft. Contact forces and bending moments for the new dynamics model are compared to static stiff and soft string models. The most significant new finding is that local contact forces and bending moments can be two to three times higher than static models ? even stiff string. This is important because higher contact forces affect critical cross sections of the drillstring; prediction of casing wear; effective operation of downhole tools such as RSS or motors; and running drillstrings or completion strings in the hole. Higher bending moments are important because they cause increased fatigue damage in drillstrings.
4. Please
explain
how
this
paper
will
present
novel
(new)
or
additive
information
to
the
existing
body
of
literature
that
can
be
of
benefit
to
a
practicing
engineer.
(25--75
words)
The novelty of the new dynamics model is in the ability to solve T&D operations of the entire drillstring in reasonable time using standard engineering computers.
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- short story manuscript format pdf
- december 20 2018 manuscript types acs publishing center
- how to format your manuscript in microsoft word
- william shunn about 1 500 words 12 courier lane pica s
- manuscript guidelines for authors
- last updated december 15 2018 manuscript preparation
- from keyboard to printed page scbwi
- guidelines for book authors and editors elsevier
- spe sample abstract new
Related searches
- sample bio new employee introduction
- sample letter for new product
- sample new benefits announcement
- sample abstract for research paper
- sample letter introducing a new employee
- new employee sample assessment
- sample bio for new hire
- sample email announcing new products
- sample attorney verification new york
- sample letter introducing new product
- sample new employee announcement email
- abstract sample pdf