It has long been recognised that during and after drilling through certain formations, the rock
moves inward and begins to close off the well. Normally this phenomenon is considered …

The need to evaluate cement behind multiple casing strings has become critical in the
context of well plug and abandonment (P&A) or slot recovery. A particularly important case, …

Recently, new and advanced ideas have been presented on the value of polymer-based
syringes for improved safety, better strength, reduced aggregation, and the prevention of drug …

In this paper, we present new ultrasonic cement evaluation technology developed and
extensively field tested over the past years. The introduction of this technology increases …

Fiber Optic (FO) sensing capabilities for downhole monitoring include, among other techniques,
Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS). The …

At times during the lifetime of an oilfield well, there is a need to establish or rectify a barrier
by using the perforation-wash-cement (P/W/C) remedial procedure. Evaluation of the P/W/C …

As oil and gas fields mature, many wells are scheduled for permanent well abandonment or
permanent abandonment of a section for subsequent slot recovery. We present a novel data …

Ultrasonic and sonic logs are increasingly used to evaluate the quality of cement placement
in the annulus behind the pipe and its potential to perform as a barrier. Wireline logs are …

/_/_____ HO Page 1 ~ Benzyne addition to N-alkyl-4-hydroxy-1-methylisoquinolinium salts;
a new and convenient synthesis of (+)-5-methyl-l0,11-dihydro-5H-dibenzo[a,tfJcyclohepten-5,lO-imine …

A robust–accurate estimation of fluid flow is the main building block of a distributed virtual
flow meter. Unfortunately, a big leap in algorithm development would be required for this …