Rotating drill pipe protector attachment and fastener assembly

Details Rotating drill pipe protector attachment and fastener assembly Rotating drill pipe protector attachment and fastener assembly

2011-05-10

2011-05-10

Neuder, William P (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

C166S241600

Reexamination Certificate

active

07938202

ABSTRACT:
An attachment and fastener system rigidly secures a rotatable drill pipe protector (RDPP) to a drill pipe. The RDPP comprises a sleeve which is split axially along at least one side. Parallel hinge bars are contained in first and second hinge sections which wrap around the hinge bars along opposite sides of the opening in the RDPP. One hinge bar is rotatable in the first hinge section. A series of axially spaced apart bolts are held in corresponding threaded openings in the rotatable hinge bar which rotates about its axis to swing the bolts in unison between open and closed positions. The other hinge bar has a series of threaded receptor openings facing outwardly from slotted openings in the second hinge section and aligned with the bolts on the other hinge bar. The rotating hinge bar swings the bolts into alignment with the slotted openings in the other hinge, after which the bolts are tightened in the threaded receptor openings for applying a holding force around the drill pipe. The hinges which wrap around each hinge bar are formed on the ends of a reinforcing cage structure molded into the wall of the RDPP.

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Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration; for International Application No. PCT/US2009/041707; International Filing Date Apr. 24, 2009; Mailing Date Aug. 10, 2009.

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