{"id":22890,"date":"2017-09-07T15:50:31","date_gmt":"2017-09-07T21:50:31","guid":{"rendered":"https:\/\/www.boartlongyear.com\/?p=22890"},"modified":"2025-03-10T14:15:48","modified_gmt":"2025-03-10T20:15:48","slug":"right-on-cue","status":"publish","type":"post","link":"https:\/\/www.boartlongyear.com\/fr\/insite\/right-on-cue\/","title":{"rendered":"Juste au bon moment\u00a0: les tiges de forage XQ\u2122 apportent l'innovation \u00e0 la c\u00e9l\u00e8bre s\u00e9rie RQ\u2122"},"content":{"rendered":"
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Cet article a paru \u00e0 l'origine dans Foreur national<\/a>.<\/em><\/span><\/p>\n<\/div>

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XQ\u2122 Drill Rods Bring Innovation to Famed RQ\u2122 Series<\/span><\/span><\/h1>
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Les vitesses de rotation \u00e9lev\u00e9es des forages au diamant ajoutent des charges dynamiques aux joints des tiges de forage \u00e0 paroi mince, qui supportent d\u00e9j\u00e0 des charges de forage fortement sollicit\u00e9es.<\/p>\n<\/div><\/div><\/div><\/div>\n\t\t\n\t\t\n\t<\/section>

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Les joints de tiges de forage doivent conserver leur r\u00e9sistance en r\u00e9sistant \u00e0 l'usure contre le trou et \u00e0 l'usure des maquillages et des \u00e9vacuations dus aux changements de forets.<\/p>\n<\/div>

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Avec la sortie imminente de la tige de forage XQ \u2122 de troisi\u00e8me g\u00e9n\u00e9ration de Boart Longyear, cet article explique comment chaque g\u00e9n\u00e9ration a permis des avanc\u00e9es d\u00e9cisives en termes de capacit\u00e9 de charge et de dur\u00e9e de vie, am\u00e9liorant consid\u00e9rablement la fiabilit\u00e9 et la productivit\u00e9. Le joint de tige de forage Q \u2122 original est r\u00e9put\u00e9 pour avoir introduit des filetages coniques grossiers avec un \u00abajustement serr\u00e9\u00bb autobloquant, mais il pouvait encore \u00eatre am\u00e9lior\u00e9.<\/p>\n<\/div>

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Au fur et \u00e0 mesure que le flanc de charge du fil (face charg\u00e9e de chaque fil) s'usait, la capacit\u00e9 de charge de l'articulation diminuait, entra\u00eenant ainsi une d\u00e9faillance: les fils sautaient, les extr\u00e9mit\u00e9s du bo\u00eetier \u00e9taient d\u00e9velopp\u00e9es et gravissaient, ou les extr\u00e9mit\u00e9s des broches cass\u00e9es par fatigue. Pour rem\u00e9dier \u00e0 ces probl\u00e8mes, Boart Longyear a ajout\u00e9 un durcissement \u00e0 la duret\u00e9 maximale de la tige sup\u00e9rieure de la tige (60 HRC), cr\u00e9ant ainsi une diff\u00e9rence de duret\u00e9 importante entre la tige et la bo\u00eete. Cette diff\u00e9rence de duret\u00e9 minimisait l'usure par rapport \u00e0 l'usure adh\u00e9sive rapide sur des filets de duret\u00e9 similaire.<\/p>\n<\/div><\/div>

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Les d\u00e9bris d'usure adh\u00e8rent \u00e0 un joint d\u00e9fectueux apr\u00e8s 12 cycles. <\/span><\/p>\n<\/div><\/div><\/div><\/div>\n\t\t\n\t\t\n\t<\/section>

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La c\u00e9mentation est in\u00e9gal\u00e9e dans la protection du filetage contre l'usure, tout en conservant la t\u00e9nacit\u00e9 requise pour supporter des charges de forage. Les tiges de forage concurrentes sont g\u00e9n\u00e9ralement durcies \u00e0 travers la paroi \u00e0 32 HRC. Sans c\u00e9mentation (pas de \u00abdiff\u00e9rence de duret\u00e9\u00bb), la dur\u00e9e de vie en service est limit\u00e9e et la capacit\u00e9 de charge se d\u00e9grade avec chaque marque et chaque rupture.<\/p>\n<\/div>

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Lors de tests comparatifs r\u00e9p\u00e9t\u00e9s \u00abmake and break\u00bb simples, il a r\u00e9cemment \u00e9t\u00e9 montr\u00e9 que des tiges concurrentes non c\u00e9ment\u00e9es tombaient en panne entre 12 et 73 cycles, alors que les joints Q et RQ \u2122 r\u00e9sistaient \u00e0 plus de 150 et 300 cycles, respectivement. Le profil du filetage Q pouvait \u00e9galement \u00eatre am\u00e9lior\u00e9. Le flanc de charge \u00e0 angle positif (+15 degr\u00e9s) tente d\u2019ouvrir ou d\u2019agrandir le caisson sous tension, ce qui limite la capacit\u00e9 de profondeur et acc\u00e9l\u00e8re l\u2019usure contre le trou.<\/p>\n<\/div>

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XQ threads. <\/span><\/p>\n<\/div>

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 Une variante de conception de courte dur\u00e9e, le MQ \u2122, dont certains concurrents proposent encore des variantes, a permis de r\u00e9duire l'angle de flanc de la charge (+2 degr\u00e9s) pour r\u00e9soudre ce probl\u00e8me. La tige de foret RQ de deuxi\u00e8me g\u00e9n\u00e9ration a rapidement remplac\u00e9 la MQ en 1999. Le joint brevet\u00e9 RQ a am\u00e9lior\u00e9 la capacit\u00e9 de charge et r\u00e9duit la dilatation de la liaison avec un flanc de charge \u00e0 angle invers\u00e9 (-10 degr\u00e9s), qui tente de r\u00e9tr\u00e9cir ou de fermer la bo\u00eete. fin, imitant la r\u00e9ponse naturelle de la charge d\u2019un tube continu.<\/p>\n<\/div>

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La dur\u00e9e de vie en service a \u00e9t\u00e9 doubl\u00e9e par la r\u00e9duction du nombre de tours lors de la fabrication et de la pause. Beaucoup de gens du secteur ont qualifi\u00e9 le RQ de canne la plus fiable pour percer des trous exigeants, profonds ou d\u00e9vi\u00e9s, en surface ou sous terre. La prochaine avanc\u00e9e consistait \u00e0 surmonter deux limites inh\u00e9rentes \u00e0 tous les joints filet\u00e9s.<\/p>\n<\/div>

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Premi\u00e8rement, tous les joints filet\u00e9s subissent de mani\u00e8re inh\u00e9rente une r\u00e9partition in\u00e9gale de la charge, ce qui favorise le premier point de contact, car la partie m\u00e2le est sous tension et la partie femelle sous compression. La contrainte et la contrainte \u00e0 ce premier point de contact produisent une dilatation et une usure in\u00e9gales du joint, commun\u00e9ment pr\u00e9sent\u00e9es sous la forme de fuites ou d'une partie mince de l'\u00e9paulement ext\u00e9rieur.<\/p>\n<\/div><\/div><\/div><\/div>\n\t\t\n\t\t\n\t<\/section>

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Les articulations XQ brevet\u00e9es pr\u00e9sentent des filetages \u00e0 double d\u00e9but oppos\u00e9s qui fournissent une r\u00e9ponse de charge \u00e9quilibr\u00e9e et doublent la surface de contact, ce qui correspond \u00e0 la moiti\u00e9 de la pression de contact. Cette progression double les cycles d\u2019essai de d\u00e9part et d\u2019arriv\u00e9e sur le QR. De plus, XQ augmente consid\u00e9rablement la capacit\u00e9 de charge en utilisant un angle de flanc de charge de -20 degr\u00e9s, le double de celui du QR, permettant ainsi des profondeurs de profondeur sup\u00e9rieures \u00e0 4 000 m\u00e8tres, soit 30% de plus que le QR.<\/p>\n<\/div>

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Deuxi\u00e8mement, le d\u00e9but de chaque fil n\u00e9cessite g\u00e9n\u00e9ralement des transitions de filetage partielles graduelles qui entra\u00eenent une usure et un calage rapides, suivies par un coincement et un filetage crois\u00e9, ce qui poserait probl\u00e8me pour les filets \u00e0 double d\u00e9marrage simples.<\/p>\n<\/div><\/div>

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Le nouveau XQ \u2122 tient bon lors des tests de comparaison \u00abmake and break\u00bb: 168 cycles, \u00e0 droite, par rapport au nouveau, \u00e0 gauche. <\/span><\/p>\n<\/div><\/div><\/div><\/div>\n\t\t\n\t\t\n\t<\/section>

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XQ pr\u00e9sente une g\u00e9om\u00e9trie innovante de d\u00e9but de filetage \u00e0 alignement automatique, garantissant un engagement sans faille des filetages correspondants, sans coincement ni blocage. Un d\u00e9marrage en douceur, associ\u00e9 \u00e0 la c\u00e9mentation, am\u00e9liore consid\u00e9rablement la productivit\u00e9 et la dur\u00e9e de vie.<\/p>\n<\/div>

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Enfin, consid\u00e9rez l'option de tube \u00e0 paroi en V de Boart Longyear, qui permet d'all\u00e9ger les cha\u00eenes de foreuse de 30%, gr\u00e2ce \u00e0 une paroi plus fine au centre du corps. Les op\u00e9rateurs ont bien accueilli cette fonctionnalit\u00e9, car des tiges plus lourdes peuvent r\u00e9duire la productivit\u00e9, en particulier dans les applications de trous profonds ou d\u00e9vi\u00e9s.<\/p>\n<\/div>

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Joint XQ \u2122. <\/span><\/p>\n<\/div>

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Une colonne de forage plus l\u00e9g\u00e8re r\u00e9duit la fatigue du foreur due \u00e0 la manipulation manuelle et augmente la capacit\u00e9 de profondeur de la foreuse. Le corps central \u00e9largi r\u00e9duit consid\u00e9rablement le temps de d\u00e9clenchement de la chambre \u00e0 air, ce qui am\u00e9liore la s\u00e9curit\u00e9 et la productivit\u00e9.<\/p>\n<\/div>

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Cependant, la section m\u00e9diane plus mince est sujette \u00e0 une r\u00e9partition in\u00e9gale de l'usure, concentr\u00e9e \u00e0 mi-parcours. Les nouvelles tiges de forage NXQ et HXQ sont exclusivement dot\u00e9es d'un tube W-Wall \u00e0 double paroi en attente de brevet, avec une r\u00e9duction globale du poids et une capacit\u00e9 de d\u00e9clenchement de tube \u00e9quivalentes \u00e0 celles du V-Wall.<\/p>\n<\/div>

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Une section interm\u00e9diaire d'\u00e9paisseur standard am\u00e9liore la dur\u00e9e de vie et la rigidit\u00e9 du corps, se rapprochant des tubes muraux standard. Semblable au RQ, le tube W-Wall est \u00e9tir\u00e9 \u00e0 froid \u00e0 partir d'acier alli\u00e9 nord-am\u00e9ricain de haute qualit\u00e9, trait\u00e9 selon les sp\u00e9cifications de Boart Longyear.<\/p>\n<\/div>

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\u00c0 mesure que les essais mondiaux sur le terrain progressent, notre confiance et notre enthousiasme grandissent quant aux avantages que la nouvelle tige XQ apportera. Sa solidit\u00e9, sa dur\u00e9e de vie et sa facilit\u00e9 de fabrication permettent de r\u00e9duire les temps d'arr\u00eat, les co\u00fbts d'exploitation, d'accro\u00eetre la productivit\u00e9 et d'accro\u00eetre les capacit\u00e9s de forage, tout en pr\u00e9servant la r\u00e9putation de l'op\u00e9rateur aupr\u00e8s des clients.<\/p>\n<\/div><\/div><\/div><\/div>\n\t\t\n\t\t\n\t<\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":66,"featured_media":23135,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[137],"tags":[184,253,267,268,269],"class_list":["post-22890","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exploration","tag-drill-rod","tag-rods","tag-products","tag-engineering","tag-xq","insitetype-drilling-innovation"],"acf":[],"yoast_head":"\nRight on Cue: XQ\u2122 Drill Rods Bring Innovation to Famed RQ\u2122 Series - Boart Longyear<\/title>\n<meta name=\"description\" content=\"As global field trials progress, so does our confidence and excitement 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