The Application of New Wireline Well TractorR Technology to Horizontal Well Logging and Intervention: A review of Field Experience in the North Sea

McInally, Gerald; Hallundbæk, Jørgen

doi:10.2523/38757-ms

Cited by 3 publications

(2 citation statements)

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“…Based on the actual construction condition, the principle hypothesizes as follows: [7][8][9][10][11] 1. The falling velocity of the crawler is constant.…”

Section: Mechanical Analysismentioning

confidence: 99%

A mathematical model for safety assessment of crawler logging

et al. 2017

Advances in Mechanical Engineering

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Horizontal well production technology is an increasingly important method to improve oil recovery. However, with the intensification of oil production, the problem of high water content in horizontal wells becomes more serious and causes oil recovery to rapidly reduce. The technique of water searching with a crawler can ensure that water searching and well production works are conducted simultaneously. The application of this technique achieves good economic and environmental outcomes. But in order to ensure the water searching system within the crawler is safe and reliable, mathematical models of the ground cable tension and the head tension of the crawler need to be established. These models are calculated and appraised on the basis of the engineering case, and it is gained that theoretical calculation results are in agreement with test results. Furthermore, the free fall limit depth of the crawler obtained by our theoretical calculation is in agreement with the test result. The study results show that the mathematical models can accurately predict ground cable tension and head tension of the crawler and are important to reduce the risks of the well logging as well as improve the success rate of water locating.

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“…Based on the actual construction condition, the principle hypothesizes as follows: [7][8][9][10][11] 1. The falling velocity of the crawler is constant.…”

Section: Mechanical Analysismentioning

confidence: 99%

A mathematical model for safety assessment of crawler logging

et al. 2017

Advances in Mechanical Engineering

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“…Although, the E-line coiled tubing (CT) and wireline tractor tools are the most commonly used methods to deploy the logging tools in horizontal wells, there are still challenges for both oil companies and service providers, especially with extended reach horizontal wells and/or wells with open hole completion. Accordingly, an extensive joint endevor between both parties has resulted in introducing a new technique for utilizing wireline tractor technology that has a better ability to meet the logging requirements and objectives [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] . This paper reviews the successful introduction of an electro-hydraulic tractor with Logging while Tractoring (LwT) technology using the industry standard mono-conductor logging cable technology in Saudi Arabia for extended reach horizontal open hole wells.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of PLT Tool Reach in Horizontal Wells Using Advanced Wireline Tractor

et al. 2010

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The horizontal wells drilled during the last few years are coming to a mature state in different fields and locations. Even the existing vertical wells are being converted to horizontal for better oil sweep and productivity. This has created the requirement to evaluate the production performance of horizontal wells to determine water source for proper monitoring and/or a remedial action.The conventional conveyance methods for the horizontal production logging tool (PLT) are either coiled tubing (CT) or E-line using a tractor. These methods satisfactorily perform in conventional horizontal wells, however, operational limitations and challenges could be encountered when the horizontal section is more complicated due to extended reach, big and inconsistent washouts and high dogleg severity. These types of challenges can prevent the passage of the logging tools to the desired depth. This has an adverse effect on both data quality and accessibility to the well's total depth (TD). Accordingly, a lot of effort is being exerted by oil companies, service providers and vendors to improve the conveying performance of logging tools using wireline tractors.An electro-hydraulic tractor with wheels was introduced and deployed for the first time in the world using mono-cable logging tractor technology into several horizontal open hole wells in a Saudi Arabian field. The wells were drilled in a carbonate formation with long horizontal sections and were producing at high rates. This tool was run as an integral part with the logging tool to help cover the entire horizontal section and reach TD while logging.The logging jobs using this new technique were completed safely and successfully at flowing and shut-in conditions. At flowing condition, the logging tool was successfully conveyed to TD and measurements were made over the entire horizontal section with the help of the tractor. The well was logged at different choke settings while measurements were taken at down passes (while tractoring) and up passes. The tractor was running at a constant speed and was able to pass a long washout of around 9" in diameter. The data analysis showed very acceptable measurements. This paper will describe the case histories, challenges, planning, deployment and advantages/disadvantages of this type of tractor.

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Unique Electric Line Deployed Mechanical Cutting, Milling and Pulling Solution Successfully Applied in a Complex Fishing Operation, Regaining Access to a Critical Well

Murchie,

Magnussen,

Finnesand

et al. 2024

Day 2 Wed, March 20, 2024

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An offshore injection well in an operating field situated in the Norwegian Continental Shelf was being used for secure dumping of old drill water and well debris, this being a critical resource in support of field operations. During a routine check of the functionality of the well's downhole safety valve (DHSV) it failed its seal test. A flow tube exercise tool was run to try and resolve the situation, however it proceeded to get stuck within the DHSV, preventing the valve functionality, blocking access to the well and hence rendering the well unusable until a solution was found. The customer utilised all usual means to fish the exercise tool, with numerous slickline and e-line runs to jar and pull the fish proving unsuccessful. An assortment of high strength fishing tools were also used, including a high strength stroker providing as high as 100 Klbs force. This too was unsuccessful, proving brute force was not the solution. A detailed analysis of the situation was carried out to determine the probable cause, the extent of the challenges faced, and the appropriate solution options available. A thorough recovery plan was then devised based on a number of key steps and processes to be executed, with a decision tree created to aid operational progress. Steps included a means of determining the exact position of the core of the exercise tool. Bespoke tooling was also designed and tested to provide the securing, cutting and milling of several internal components of the exercise tool to enable it to be pulled free from the valve. These e-line deployed solutions were highly innovative, providing extremely effective, precise, and controlled capabilities resulting in the flow tube exercise tool retrieval, in turn enabling further intervention operations and a subsequent re-completion to be carried out. As a result of the processes and solutions devised to recover the stuck exercise tool from this well, a new method for securely exercising DHSV flow tubes using strokers has been devised and applied as an alternate method by the operator.

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The Application of New Wireline Well TractorR Technology to Horizontal Well Logging and Intervention: A review of Field Experience in the North Sea

Cited by 3 publications

References 0 publications

A mathematical model for safety assessment of crawler logging

A mathematical model for safety assessment of crawler logging

Enhancement of PLT Tool Reach in Horizontal Wells Using Advanced Wireline Tractor

Unique Electric Line Deployed Mechanical Cutting, Milling and Pulling Solution Successfully Applied in a Complex Fishing Operation, Regaining Access to a Critical Well

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