Notice bibliographique
Résumé
Multilateral Work-Overs: A New Possibility with Coiled Tubing John Ravensbergen John Ravensbergen BJ Services Company Search for other works by this author on: This Site Google Scholar Paper presented at the SPE/IADC Middle East Drilling Technology Conference, Bahrain, October 2001. Paper Number: SPE-72285-MS https://doi.org/10.2118/72285-MS Published: October 22 2001 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Ravensbergen, John. "Multilateral Work-Overs: A New Possibility with Coiled Tubing." Paper presented at the SPE/IADC Middle East Drilling Technology Conference, Bahrain, October 2001. doi: https://doi.org/10.2118/72285-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE/IADC Middle East Drilling Technology Conference and Exhibition Search Advanced Search AbstractThe number of fields that are being developed, or re-developed, using multi-lateral wells to enhance the effective drainage from minimal surface facilities is increasing. Some of these types of wells have complex Level 3, or higher, junctions but the vast majority are still Level 1 junctions.Often drilling and other damage can be imposed on the various exposed leg well bores, as in the case of a Level 1 junction, while the other branches of the well are being drilled. This formation near well bore damage can, in the extreme, lead to a re-evaluation of the field development strategy as there has been no intervention method available to enter the various branches and perform effective stimulation or clean-up and, therefore, achieve the full production potential from the well.This paper describes a new Bottom Hole Assembly (BHA), enabling a new method to workover multilateral wells using coiled tubing. The BHA and its method of navigating through multi-lateral wells makes the assumption a smart and/or selective entry completion is not installed in the well. Therefore, the onus is on the BHA to intelligently navigate through a junction(s) whether it is an open hole or cased hole. The BHA's operational success however, is dependent on the geometry of the junctions.Examples from case studies performed in Canada Venezuela will be used to explain how the geometry is critical for successful operation of the tool. In addition, these case studies will explain what type of workovers have been tested and proven and what further possibilities exist.IntroductionThis paper describes a new bottom hole assembly (BHA), and a lateral entry guidance system (LEGS), herein referred to as the LEGS BHA. The LEGS BHA is a through tubing device and in its current form it is small enough to pass through the completion tubing and function in diameters of typical casings or liners.The BHA can cope with many completion types, however, operational considerations must be made for success. As a result it is now possible to perform workover treatments in well bores that were previously impossible to treat or in a manner which is more cost effective.This paper begins with a brief description of how the tool functions1. Next the completion type, geometry of the junction, and treatment fluid parameters will be reviewed to determine the iMPact these parameters have on the success of the job. Lastly, case histories of completed jobs will be cited to add practical, on the job realism to the discussion.LEGS BHA FunctionThe LEGS BHA is an intelligent robotic device. The BHA controls its own actions depending on the environment in which it finds itself. When the BHA is at the entrance to a lateral, and activated, it will adjust its shape to point directly into the lateral. The BHA will perform the necessary movements without any assistance from the operator, other than its reliance on the supply of hydraulic power. In addition, if the BHA is pointing into the lateral it will communicate this information to the operator at surface. Keywords: oil 25 90 0, kick-off assembly, upstream oil & gas, procedure, iadc spe 72285, sweep assembly, operator, bha, assembly, valve Subjects: Drilling Operations, Directional drilling, Completion Installation and Operations, Coiled tubing operations This content is only available via PDF. 2001. SPE/IADC Drilling Conference You can access this article if you purchase or spend a download.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,003 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,001 |
| Méta-épidémiologie (sens large) | 0,001 | 0,001 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,002 | 0,003 |
| Communication savante | 0,004 | 0,009 |
| Science ouverte | 0,002 | 0,005 |
| Intégrité de la recherche | 0,002 | 0,002 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,026 | 0,005 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».