Browse Prior Art Database

Wireline low tensions while RIH, deployment in cased or open hole – friction, rollers, centralizers

IP.com Disclosure Number: IPCOM000240586D
Publication Date: 2015-Feb-10
Document File: 2 page(s) / 15K

Publishing Venue

The IP.com Prior Art Database

Abstract

With new well designs, trajectory becomes more and more complicated which introducing problems to reach target depth on wireline. This results in loss of revenue because customer thinks that rather than lose the whole string downhole better try to acquire data using MWD/LWD means or completely reject an idea to acquire data due to risks. If decision made to acquire data on wireline then we face with issues of very low tension while RIH which introducing risks of damaging wire on this or subsequent runs which may cause premature failure of the conductors or even worse - breaks of the armors etc. or not reaching target depths. We are using different techniques to help deployment but at the same time we are using slipovers or inline centralizers to centralize the string to acquire good quality data. Dilemma is how to reduce friction to increase wireline tension while RIH. One of the options for cased hole is using vendor's tractors to descent most of the times just simulates safe deployment whereas in reality tractor force that was modeled to apply cannot be physically done due to tractor limitations and wellbore trajectory. We have no means to measure real tension downhole to analyze if cable was under compression, if drum crush occured etc. Tractor provider has tension measuring devices but introducing them means they are exposing themselves to reality that no tractor force applied and that cable is under compression. We need to introduce our own means of measurements of tensions above the tractor and below. We need to introduce low friction slipovers and inline centralizers for 16", 13-3/8", 9-5/8", 7-5/8", 7", 5-1/2" and 5" casings, liners and tubings. Design would be similar to flywheels mounted on large OD slipovers or centralizers. These will help deployment by reducing friction of the whole string the same way as flywheels do. We need to introduce hole finders with similar low friction flywheels at the bottom that can centralize and at the same time reduce friction of the bottom part of the string that has the most weight on it. By introducing tension measurement above and below the tractor customer will benefit by not paying tractor company huge amount of money if they know that force that is required to reach target depth cannot be applied and this is only heavy sinker bar. This will show correct values of minimum tension thus advising customer that cable was possibly damaged so that not used for the next well which can cause many hours of lost time. By introducing low friction slipovers and inline centralizers of various sizes we possibly can reach target depth without compromising cable specifications and this will save cost to customer by not using tractors. For open hole application we can reach target depths without PCL option (pipe conveyed option) which is very costly to customer due to the time it takes to deploy.

This text was extracted from a Microsoft Word document.
This is the abbreviated version, containing approximately 52% of the total text.

OPE4-56652-US

Title:

Wireline low tensions while RIH, deployment in cased or open hole – friction, rollers, centralizers

Abstract:

With new well designs, trajectory becomes more and more complicated which introducing problems to reach target depth on wireline. This results in loss of revenue because customer thinks that rather than lose the whole string downhole better try to acquire data using MWD/LWD means or completely reject an idea to acquire data due to risks. If decision made to acquire data on wireline then we face with issues of very low tension while RIH which introducing risks of damaging wire on this or subsequent runs which may cause premature failure of the conductors or even worse - breaks of the armors etc. or not reaching target depths. We are using different techniques to help deployment but at the same time we are using slipovers or inline centralizers to centralize the string to acquire good quality data. Dilemma is how to reduce friction to increase wireline tension while RIH. One of the options for cased hole is using vendor's tractors to descent most of the times just simulates safe deployment whereas in reality tractor force that was modeled to apply cannot be physically done due to tractor limitations and wellbore trajectory. We have no means to measure real tension downhole to analyze if cable was under compression, if drum crush occured etc. Tractor provider has tension measuring devices but introducing them means they are exposing themselves to reality that no tractor force applied and that cable is under compression. We need to introduce our own means of measurements of tensions above the...