New 4 3/4" rotary steerable system is combined with a performance drilling motor to reduce risks associated with rotary drilling with small diameter pipe.

2005 ◽  
Author(s):  
Robert Alistair Kellas ◽  
Jonathan Paul Ruszka ◽  
Hartmut Gruenhagen
Keyword(s):  
Small Diameter ◽  
Rotary Drilling ◽  
Diameter Pipe ◽  
A Performance

scholarly journals Residual Stress Improvement on Inside Wall of Small-Diameter Pipe by Underwater Laser Ablation

2002 ◽  
Vol 122 (1) ◽  
pp. 156-162 ◽  
Author(s):  
Yuji Sano ◽  
Masaki Yoda ◽  
Naruhiko Mukai ◽  
Mitsuaki Shimamura ◽  
Yoshiaki Ono ◽  
...  
Keyword(s):  
Residual Stress ◽  
Laser Ablation ◽  
Small Diameter ◽  
Diameter Pipe ◽  
Underwater Laser ◽  
Inside Wall

CIVA Simulation and Experiment Verification for Thin-Walled Small-Diameter Pipes by Using Phased Array Ultrasonic Testing

2020 ◽  
Author(s):  
Jun Si ◽  
Daoxiang Wei ◽  
Yuqing Yang ◽  
Xiaoying Tang
Keyword(s):  
Phased Array ◽  
Small Diameter ◽  
Radiographic Testing ◽  
Diameter Pipe ◽  
Array Probe ◽  
Experiment Verification ◽  
Simulation And Experiment ◽  
Detection Capabilities ◽  
Thin Walled ◽  
Defect Detectability

Abstract Regular inspection is important to verify the integrity of in-service pipeline in the petrochemical industry. Early detection of flaws is therefore essential to ensure the continued safe operation of pipeline. In generally, Conventional ultrasonic for thin-walled small-diameter pipes has limitations due to regulation requirements, efficiencies, lack of permanent results and repeatability. In many cases, the preferred method of inspection is radiographic testing, however there are many obvious shortcomings for radiographic detection. The aim of this work was to propose appropriate phased array ultrasonic scan plans that were able to achieve the following: reduce the inspection times, improve defect detectability and sizing, and reduce human intervention, which will reduce workforce radiation uptake. Ultrasonic simulation using CIVA and experimental verification for thin-walled small-diameter pipe with flaws that were carried out to determine the most appropriate phased array probe and its detection capabilities in this paper.

Evaluation of Residual Stresses Induced by Repairs to Small Diameter Stainless Steel Pipe Welds

2015 ◽  
Author(s):  
Trevor G. Hicks ◽  
William R. Mabe ◽  
Jason R. Miller ◽  
John V. Mullen
Keyword(s):  
Stainless Steel ◽  
Residual Stresses ◽  
Large Diameter ◽  
Small Diameter ◽  
Steel Pipe ◽  
Limited Information ◽  
Diameter Pipe ◽  
Stainless Steel Pipe ◽  
Lower Magnitude ◽  
The Impact

Residual stresses within stainless steel pipe welds may cause or exacerbate in-service cracking. Significant investigative efforts have been devoted to the examination of piping residual stresses in large diameter piping using both finite element modeling and experimental techniques, but limited information is available for small diameter piping. Even less information is available for small diameter piping welds which have been repaired or re-worked during initial fabrication. This investigation used both experimental methods and analytical modeling to assess the impact of repair welding during initial fabrication on the residual stresses along the inner diameter (ID) of small diameter pipe specimens. The investigation showed that tensile axial residual stresses were located in the heat affected zone (HAZ) along the ID of the pipe specimens adjacent to regions which were excavated and re-welded. Such repair welds were also shown to markedly increase the magnitude of the tensile axial residual stresses for weld configurations which otherwise had lower magnitude residual stresses.

scholarly journals Particle Image Velocimetry of Oil–Water Two-Phase Flow with High Water Cut and Low Flow Velocity in a Horizontal Small-Diameter Pipe

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2702 ◽  
Author(s):  
Lianfu Han ◽  
Haixia Wang ◽  
Xingbin Liu ◽  
Ronghua Xie ◽  
Haiwei Mu ◽  
...  
Keyword(s):  
Flow Field ◽  
Particle Image ◽  
Small Diameter ◽  
High Water ◽  
Low Flow ◽  
Image Velocimetry ◽  
Diameter Pipe ◽  
High Water Cut ◽  
Water Cut ◽  
Improved Algorithm

Velocity and flow field are both parameters to measure flow characteristics, which can help determine the logging location and response time of logging instruments. Particle image velocimetry (PIV) is an intuitive velocity measurement method. However, due to the limitations of image acquisition equipment and the flow pipe environment, the velocity of a horizontal small-diameter pipe with high water cut and low flow velocity based on PIV has measurement errors in excess of 20%. To solve this problem, this paper expands one-dimensional displacement sub-pixel fitting to two dimensions and improves the PIV algorithm by Kriging interpolation. The improved algorithm is used to correct the blank and error vectors. The simulation shows that the number of blank and error vectors is reduced, and the flow field curves are smooth and closer to the actual flow field. The experiment shows that the improved algorithm has a maximum measurement error of 5.9%, which is much lower than that of PIV, and that it also has high stability and a repeatability of 3.14%. The improved algorithm can compensate for the local missing flow field and reduce the requirements related to the measurement equipment and environment. The findings of this study can be helpful for the interpretation of well logging data and the design of well logging instruments.

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