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US 5,209,521 AGranted
Expanding load shoulder
AssigneeCooper Industries, Inc.
InventorRoger S. Osborne
Life of this patent
Estimating the term…
Abstract
A self-actuating, releasable weight support system includes a structural support member with a central bore therethrough. The bore has a recessed load support surface therein and a no-go shoulder on the inner periphery of the load support surface. A weight support member is insertable within the bore, and includes an expandable load ring disposed thereon for landing on the no-go shoulder and expanding onto the load support surface as the weight support member is inserted further into the bore.
Claims11
A self-actuating, releasable weight support system, comprising:
- a generally circular cylindrical structural support member having a central bore therethrough, said bore having an annular groove with a recessed load support surface therein and a no-go shoulder adjacent thereto;
- a generally circular cylindrical weight support member insertable within said bore, said weight support member having an actuating portion with a tapered outer surface and an annular stop shoulder at the larger diameter end of said tapered outer surface;
- an annular retainer ring attached to the smaller diameter end of said tapered outer surface;
- an expandable split load ring slidably disposed on said weight support member between said retainer ring and said top shoulder and supported by said annular retainer ring when aid releasable weight support system is assembled, said load ring including landing means for landing on said no-go shoulder and tapered actuating surface means engageable with said tapered outer surface of aid actuating portion of said weight support member as said weight support member moves further into said bore, for camming and expanding said load ring onto said load support surface as said weight support member is inserted further into said bore;
- shearable connection means disposed between said split load ring and said retainer ring for releasably connecting said split load ring to said retainer ring and for preventing the premature expansion of said split load ring in said bore prior to said load ring landing on said no-go shoulder, said shearable connection means including actuation means responsive to the weight of said weight support member applied to said split load ring after landing on said no-go shoulder for causing said shearable means to shear for separating said split load ring from said retainer ring, and wherein further movement of said weight support member into said bore causes said tapered actuating surface means of said split load ring to further engage with and slide along said tapered surface of said weight support member until said split load ring abuttingly engages said annular stop shoulder, said annular stop shoulder including means engageable with said load ring for supporting said weight support member on said load ring and preventing further travel of said weight support member past said groove when said split road ring is fully cammed onto said groove.
2 more elements
A casing head and hanger apparatus for suspending multiple casing strings from the head in an oil or gas well, comprising:
- a head member having a generally circular cylindrical bore therethrough;
- a first recessed annular load support groove in the wall of said bore, said bore below said groove forming a first restricted inner diameter area comprising a first annular no-go stop shoulder;
- a first hanger for suspending casing therefrom, said hanger carrying a first expandable load ring including means engageable with said no-go stop shoulder for expanding said load ring into said first groove upon actuation of said expanding means by landing said first expandable load ring on said first no-go stop shoulder and continued downward movement of said first hanger;
- a second recessed annular load support groove in the wall of said bore disposed above said first recessed annular load support groove, said bore wall between said first and second grooves having a greater internal diameter than said first no-go stop shoulder and forming a second restricted inner diameter area comprising a second annular no-go stop shoulder for said second groove;
- a second hanger for suspending casing therefrom within the casing suspended from said first hanger, said second hanger carrying a second expandable load ring including means engageable with said second no-go stop shoulder for expanding said second load ring into said second groove upon actuation of said expanding means by landing aid second expandable load ring on said second no-go stop shoulder and continued downward movement of said second hanger;
- and
- the bore wall above said second groove having a greater internal diameter than said second no-go stop shoulder.
4 more elements
Dependencies are inferred from the claim text.