Method and apparatus for locking a tubular quick coupling
First Claim
Patent Images
1. A locking quick coupling for heavy tubular connections comprising:
- a) an elongated tubular insertion member having external curved tapered dogs and a sealing means at a leading end;
b) an elongated tubular receiving member for mating with said insertion member having external threads and internal notches and locking grooves therein adjacent one end for receiving said dogs;
c) a locking washer having wedge-shaped tangs perpendicular to said washer slidable upon said insertion member; and
d) a locking nut having internal threads cooperative with said external threads located upon said receiving member slidable upon said insertion member.
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Abstract
A heavy duty, locked, tubular quick coupling used for coupling oil and gas well tubing or pipe joints, thus allowing long strings of pipe and tube joints subsequently connected to at least one such quick coupled joint to be lifted as a string, thereby applying tensile loading to the quick coupled joints. Both interior and exterior locking arrangements for the locked quick coupling are disclosed which utilize twist-locking elements secured in position by a locking washer and cap nut. Arrangements are also disclosed illustrating how the locking couplings are used for fast setup of wire-line riser strings utilizing multiple specialty subs and valve assemblies.
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Citations
17 Claims
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1. A locking quick coupling for heavy tubular connections comprising:
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a) an elongated tubular insertion member having external curved tapered dogs and a sealing means at a leading end;
b) an elongated tubular receiving member for mating with said insertion member having external threads and internal notches and locking grooves therein adjacent one end for receiving said dogs;
c) a locking washer having wedge-shaped tangs perpendicular to said washer slidable upon said insertion member; and
d) a locking nut having internal threads cooperative with said external threads located upon said receiving member slidable upon said insertion member. - View Dependent Claims (2, 3, 4, 5, 6, 16)
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7. A locking quick coupling for heavy tubular connections comprising:
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a) an elongated tubular insertion member having an external sealing means located adjacent a leading end, external curved tapered dogs and external threads located adjacent said dogs opposite said leading end;
b) an elongated tubular receiving member for mating with said insertion member having receiving notches and external locking grooves therein adjacent one end for receiving said dogs;
c) a locking washer having wedge-shaped tangs perpendicular to said washer slidable upon said insertion member; and
d) a locking nut having internal threads cooperative with said external threads located upon said insertion member slidable upon said insertion member. - View Dependent Claims (8, 9, 10, 11, 12, 17)
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13. A method for quick coupling a tubular wire-line riser assembly including tubular joints, special sub joints and valves potentially connectable to a plurality of down-hole tubular joints in a manner whereby said riser assembly and down hole tubular joints may be lifted as a combined unit whenever necessary comprising the steps of:
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a) incorporating at least one tubular locking quick coupling comprising an elongated tubular insertion member having external curved tapered dogs and a sealing means at a leading end, an elongated tubular receiving member for mating with said insertion member having external threads and internal notches and grooves therein adjacent one end for receiving said dogs, a locking washer having wedge-shaped tangs perpendicular to said washer slidable upon said insertion member, and a locking nut having internal threads cooperative with said external threads located upon said receiving member slidable upon said insertion member, into at least one of said tubular joints by adapting each free end of said coupling to one end of an adjoining tubular joint;
b) passing a wire-line through said riser assembly including said locking quick coupling and down hole tubular string; and
b) lifting said riser assembly containing at least one said locking quick coupling while connected to said down hole tubular string. - View Dependent Claims (14, 15)
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Specification