US6725949B2 - Washpipe assembly - Google Patents US6725949B2 - Washpipe assembly - Google Patents Washpipe assembly Info Publication number US6725949B2 US6725949B2 US10229948 US22994802A US6725949B2 US 6725949 B2 US6725949 B2 US 6725949B2 US 10229948 US10229948 US 10229948 US 22994802 A US22994802 A US 22994802A US 6725949 B2 US6725949 B2 US 6725949B2 Authority US Grant status Grant Patent type Prior art keywords torque tubular connector washpipe assembly geared nut washpipe Prior art date 2001-08-27 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number US10229948 Other versions Inventor Padmasiri Daya Seneviratne Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Varco I/P Inc Original Assignee Varco I/P Inc Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 2001-08-27 Filing date 2002-08-27 Publication date 2004-04-27 Grant date 2004-04-27 Links • • • • • Images • • • • • • • • • • • • Classifications • • E— FIXED CONSTRUCTIONS • E21— EARTH DRILLING; MINING • E21B— EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS • E21B21/00— Methods or apparatus for flushing boreholes, e.g. By use of exhaust air from motor • E21B21/02— Swivel joints in hose-lines Abstract. A drilling system and a method of using a drilling system that has a first rotatable tubular connector, a second non-rotatable tubular connector and a washpipe assembly having at least one dynamic seal and defining a fluid conduit having at one end a first mating connector and at another end a second mating connector designed to interconnect with the first and second tubular connectors. A controllable torque driver is arranged to mechanically engage the washpipe assembly such that fluid connections are made between the first mating connector and the first tubular connector, and the second mating connector and the second tubular connector. CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims priority under 35 U. Vauxhall astra mk3 97 manual. S.C. §119(e) to U.S. Provisional Application Ser. Tds 11 For SaleTeradyne j750 programming manual. More Power: The TDS-11SH AC Top Drive is powered by two 550 HP air-cooled permanent magnet AC motors (1100 HP total) giving drillers the power and torque they need to find harder to reach pockets of oil and gas. The TDS-11SH offers 38% more torque with only a six inch increase in height. 60/315,072, filed Aug. FIELD OF THE INVENTION The invention relates generally to equipment useful in earth boring operations performed by a rotary drilling system and specifically to an improved portion of a rotary drilling system that allows for safe and convenient maintenance of the washpipe dynamic seals that are subject to heavy wear during drilling operations. More specifically, the present invention contemplates an improved washpipe assembly apparatus and a method for installing and removing the same. BACKGROUND OF THE INVENTION A top drive well drilling apparatus typically includes a top drive system (TDS) connectable to the upper end of a drill string to drive the drill string rotatively and which moves upwardly and downwardly with the string during the drilling operation. ![]() The TDS includes a tubular main shaft, the lower end of which is threadedly connectable to the upper end of the drill string and through which drilling mud is delivered downwardly to the string and drill bit from a gooseneck and swivel assembly at the upper end of the unit. The unit further includes a motor to drive the main shaft rotatively as the well is drilled. A washpipe assembly comprising at least one dynamic seal and a tubular element is threadedly connected between the top of the main shaft and the bottom of the gooseneck/swivel assembly. The washpipe assembly is located above the rotating TDS main shaft and below the stationary gooseneck.
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