Water Shut-Off Using an Inflatable Composite Sleeve Polymerised In-Situ. A Case History on Forties Delta

1998 ◽  
Author(s):  
J. Leighton ◽  
J.L. Saltel ◽  
J. Morrison ◽  
R. Welch ◽  
J. Pilla
Keyword(s):  
Case History

In Situ Investigation of False-Positive Liquefaction Sites in Christchurch, New Zealand: Palinurus Road Case History

2019 ◽  
Author(s):  
Kaleigh M. Yost ◽  
Brady R. Cox ◽  
Liam Wotherspoon ◽  
Ross W. Boulanger ◽  
Sjoerd van Ballegooy ◽  
...  
Keyword(s):  
New Zealand ◽  
Case History ◽  
False Positive ◽  
In Situ Investigation

Stimulation of a Producing Horizontal Well Using Enzymes that Generate Acid In-Situ - Case History

2001 ◽  
Author(s):  
Ralph E. Harris ◽  
Ian D. McKay ◽  
Justin M. Mbala ◽  
Robert P. Schaaf
Keyword(s):  
Case History ◽  
Horizontal Well ◽  
Stimulation Of

Soil classification using the cone penetration test

1990 ◽  
Vol 27 (1) ◽  
pp. 151-158 ◽  
Author(s):  
P. K. Robertson
Keyword(s):  
Case History ◽  
Soil Classification ◽  
Cone Penetration Test ◽  
Deep Borehole ◽  
Penetration Test ◽  
Cone Penetration ◽  
Using Data ◽  
New System ◽  
Good Agreement

Several charts exist for evaluating soil type from electric cone penetration test (CPT) data. A new system is proposed based on normalized CPT data. The new charts are based on extensive data available from published and unpublished experience worldwide. The new charts are evaluated using data from a 300 m deep borehole with wire-line CPT. Good agreement was obtained between samples and the CPT data using the new normalized charts. Recommendations are provided concerning the location at which to measure pore pressures during cone penetration. Key words: soil classification, cone penetration test, in situ, case history.

Case History of South Belridge, California, In-Situ Combustion Oil Recovery

1992 ◽  
Author(s):  
H.J. Ramey ◽  
V.W. Stamp ◽  
F.N. Pebdani ◽  
J.E. Mallinson
Keyword(s):  
Oil Recovery ◽  
Case History ◽  
In Situ Combustion ◽  
History Of

Evaluation of soil state from SBP and CPT: A case history

2008 ◽  
Vol 45 (6) ◽  
pp. 824-844 ◽  
Author(s):  
Mohsen Ghafghazi ◽  
Dawn A. Shuttle
Keyword(s):  
Case History ◽  
Large Strain ◽  
State Parameter ◽  
Ground Truth ◽  
Cohesionless Soils ◽  
Pressuremeter Test ◽  
Hydraulic Fill ◽  
Strength Data ◽  
Accuracy Validation

The cone pressuremeter test (CPT) is widely used to determine the in situ “state” of cohesionless soils. However, although the CPT is simple, inexpensive, and accurate the subsequent interpretation contains substantial uncertainties even with modern approaches. Self-bored pressuremeters (SBP) have the opposite attributes. Obtaining good SBP data is difficult in sands, but the subsequent evaluation can be rather precise. This paper compares estimates of the in situ state parameter, ψ, from CPT and SBP tests carried out in a uniform hydraulic fill. This case history is unusual in that (i) the fill was well controlled and uniform, (ii) comprehensive laboratory strength data exists, (iii) the CPT was calibrated for the fill in a large chamber, and (iv) good SBP data exist. These SBP and CPT tests are independently analyzed using a calibrated critical state model implemented in a large strain finite element code. The effects of ageing and fabric are considered. The resulting most probable in situ state parameters for the fill from the CPT are close to those derived from the SBP. Although not proof of accuracy (validation) of either test, since ground truth is not known, the results lend support to the adequacy of the interpretation methodology used for both. Further improvements are discussed.

Case History Fitness-for-Service Assessment of Cyclic Catalytic Reformer Motor Operated Valves in the Petrochemical Industry

2011 ◽  
Author(s):  
Nick A. Carr ◽  
Kraig S. Shipley ◽  
David J. Dewees
Keyword(s):  
Ambient Temperature ◽  
Thermal Shock ◽  
Case History ◽  
Petrochemical Industry ◽  
Large Diameter ◽  
Catalyst Regeneration ◽  
Process Flow ◽  
Valve Body ◽  
Catalytic Reformer

Reactors of cyclic catalytic reformers require catalyst regeneration about every 7 days (∼50 cycles per year). To facilitate the in situ regeneration, large diameter motor operated valves (MOV) are used (typically Class 600 NPS 8 to NPS 16 API 600 gate block valves). Double block-n-bleed arrangements of the MOVs are used to assure isolation of the 350 psig 960°F process and regeneration media. The regeneration MOVs will be closed and in isolation for up to 4 days and can reach temperatures close to ambient depending on their distance from the process flow. Once the MOVs are swung open, the valve body quickly transitions from ambient temperature to 960°F over a matter of minutes. Such an extreme thermal shock has historically led to a number of cracks in the MOV valve bodies. With each unit having over 50 MOVs, it becomes expensive and time consuming to open every MOV at a scheduled turnaround, inspect, and repair any cracking noticed.

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