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1. (WO2015126670) VARIABLE SPEED PIPELINE PIG WITH INTERNAL FLOW CAVITY
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2015/126670 International Application No.: PCT/US2015/015193
Publication Date: 27.08.2015 International Filing Date: 10.02.2015
IPC:
B08B 9/055 (2006.01) ,F16L 55/38 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
08
CLEANING
B
CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
9
Cleaning hollow articles by methods or apparatus specially adapted thereto
02
Cleaning pipes or tubes or systems of pipes or tubes
027
Cleaning the internal surfaces; Removal of blockages
04
using cleaning devices introduced into and moved along the pipes
053
moved along the pipes by a fluid, e.g. by fluid pressure or by suction
055
the cleaning devices conforming to, or being conformable to, substantially the cross-section of the pipes, e.g. pigs or moles
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
L
PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
55
Devices or appurtenances for use in, or in connection with, pipes or pipe systems
26
Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
28
Constructional aspects
30
of the propulsion means, e.g. towed by cables
38
driven by fluid pressure
Applicants:
SAUDI ARABIAN OIL COMPANY [SA/SA]; 1 Eastern Avenue Dhahran, 31311, SA
ARAMCO SERVICES COMPANY [US/US]; 9009 West Loop South Houston, TX 77096, US (AG)
Inventors:
SOLIMAN, Mohamed Ahmed A.; SA
Agent:
RHEBERGEN, Constance Gall; US
Priority Data:
14/187,46724.02.2014US
Title (EN) VARIABLE SPEED PIPELINE PIG WITH INTERNAL FLOW CAVITY
(FR) RACLEUR DE CANALISATION À VITESSE VARIABLE À CAVITÉ D'ÉCOULEMENT INTERNE
Abstract:
(EN) A pipeline pig (10) includes a plurality of relief channels (34) and a bypass channel (32) extending therethrough. To regulate a speed of the pipeline pig, relief valves within the relief channels open when a differential pressure between upstream and downstream ends of the pipeline pig reaches a pre-selected minimum relief pressure, If the differential pressure reaches a pre-selected maximum relief pressure, such as when the pipeline pig encounters an obstruction, the relief valves close to allow the differential pressure to further increase to clear the obstruction, If the further increase in differential pressure is insufficient to clear the obstruction and the differential pressure reaches a pre-selected minimum bypass pressure, a bypass valve opens to permit fluid flow through the bypass channel while the relief valves are closed. Flow through the bypass channel operates to reduce turbulence and permit production through the pipeline if the pipeline pig becomes stuck and obstructs the pipeline.
(FR) La présente invention concerne un racleur de canalisation (10) comprenant une pluralité de canaux de décharge (34) et un canal de dérivation (32) s'étendant dans celui-ci. Afin de réguler une vitesse du racleur de canalisation, des soupapes de décharge situées dans les canaux de décharge s'ouvrent quand une différence de pression entre les extrémités amont et aval du racleur de canalisation atteint une pression de décharge minimale pré-sélectionnée. Si la différence de pression atteint une pression de décharge maximale pré-sélectionnée, comme lorsque le racleur de canalisation rencontre un obstacle, les soupapes de décharge se ferment pour permettre à la différence de pression d'augmenter encore afin de dégager l'obstacle. Si l'augmentation supplémentaire de la différence de pression ne suffit pas pour dégager l'obstacle et que la différence de pression atteint une pression de dérivation minimale pré-sélectionnée, une soupape de dérivation s'ouvre pour permettre l'écoulement du fluide dans le canal de dérivation tandis que les soupapes de décharge sont fermées. L'écoulement dans le canal de dérivation sert à réduire la turbulence et à permettre la production dans la canalisation si le racleur de canalisation se coince et obstrue la canalisation.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)