A connection and protective ring therefor
AssigneeNational Oilwell Varco UK Limited
InventorThomas Kilpatrick MCLAUGHLIN
Life of this patent
Estimating the term…
Abstract
Disclosed is a connection comprising first and second lined tubular members having a coincident bore and a protective ring. The first lined tubular member has a pin end and the second lined tubular member has a box end. Each lined tubular member includes a tubular body, an annular liner, and a mortar filled annulus therebetween. The mortar filled annulus has an annular recess therein at at least one of the pin end and box end for receiving a part of the protective ring. The part received may be a flange on the ring.
Claims18
A connection comprising:
- first and second lined tubular members having a coincident bore and a protective ring, the first lined tubular member having a pin end and the second lined tubular member having a box end, each lined tubular member comprising a tubular body having an internal surface of constant diameter, an annular liner and a mortar filled annulus therebetween;
- wherein said mortar filled annulus has an annular recess therein at at least one of the pin end and box end configured to receive a part of the protective ring upon connection of the first and second tubular members.
A connection comprising first and second lined tubular members having a coincident bore and a protective ring, the first lined tubular member having a pin end and the second lined tubular member having a box end each lined tubular member comprising a tubular body, an annular liner and a mortar filled annukus therebetween, said mortar filled annulus has an annular recess therein at at least one of the pin end and box end, said protective ring has a body having a side and a flange extending therefrom, the flange having a depth substantially equal to the thickness of said mortar filled annulus the flange received in said annular recess.
A lined tubular member comprising:
- an annular liner;
- a tubular body;
- annular liner arranged in a tubular body the tubular body of constant diameter along the length of the liner a box end;
- the annular liner arranged in the tubular body, the tubular body of constant diameter along the length of the liner,
- a mortar filled annulus between the annular liner and the tubular body;
- wherein said mortar filled annulus comprises an annular recess;
- and
- a protective ring comprising a body and a flange and a further flange, the further flange being disposed, in said annular recess.
A method for connecting lined first and second tubular members, the first lined tubular member having a pin end and the second lined tubular member having a box end, the first and second lined tubular members each further comprising a tubular body having an internal surface of constant diameter, an annular liner and a mortar filled annulus therebetween, wherein said mortar filled annulus at the pin end comprises an annular recess, and wherein the box end comprises a protective ring, the method comprising:
- stabbing the pin end into the box end;
- spinning at least one lined tubular member whereupon a part of the protective ring
- inserts into the annular recess and a connection is made between the first and second tubular members;
- and
- torqueing the connection.
Dependencies are inferred from the claim text.