Combination motor casing and spear
View Patent ↗A wellhead removal tool features a rotary cutter run by a Moyno type progressive cavity pump that is powered by fluid pumped through it. The stator of the motor has a gripping device with a series of collets or slip inserts that have grip features that face outwardly. A support shoulder on the grip assembly cooperates with a j-slot connection to the stator to allow a cone to be moved under the collets to push them into a grip position below or in a selected portion of the wellhead where the grip will not damage the wellhead internal components. Fluid pumped through the downhole motor causes the casing cutter blades to extend and rotate to cut the casing.
1. A wellhead removal apparatus from a downhole tubular, comprising:
a tubular cutter;
a motor further comprising a rotor and a surrounding housing with said rotor supporting said cutter for selective cutting of the tubular without a centralizer on said rotor or said housing in the tubular to be cut by said cutter;
a selectively extendable grip attached to said motor housing for support of said motor within the wellhead or the downhole tubular adjacent said wellhead;
said cutter remaining at a fixed distance from said extended grip;
said cutter cutting the tubular at a distance where said cutter locates when said grip obtains support, said distance determined by the length said housing, rotor and cutter extend from said support of said grip.
2. The apparatus of claim 1 , wherein:
said grip supports said motor below the wellhead; and
said cutter comprises a casing or conductor cutter.
3. The apparatus of claim 1 , wherein:
said grip supports the motor within the wellhead.
4. The apparatus of claim 1 , wherein:
the mounting location of said grip is adjustable along the motor.
5. The apparatus of claim 4 , wherein:
said motor is a progressing cavity type motor and said grip is attached to a stator on said motor and said cutter is mounted to a rotor of said motor.
6. The apparatus of claim 5 , wherein:
said grip further comprises a landing hub to engage the wellhead to locate said grip within or below the wellhead.
7. The apparatus of claim 1 , wherein:
said grip further comprises a landing hub to engage the wellhead to locate said grip within or below the wellhead.
8. A wellhead removal apparatus from a downhole tubular, comprising:
a tubular cutter;
a motor supporting said cutter for selective cutting of the tubular;
a selectively extendable grip for support of said motor within the wellhead or the downhole tubular;
said grip further comprises a landing hub to engage the wellhead to locate said grip within or below the wellhead;
said grip comprises a plurality of fingers with grip heads and said motor comprises a cone selectively engageable with said heads to drive them radially outwardly for a grip.
9. The apparatus of claim 8 , wherein:
said cone is mounted to a stator portion of said motor;
said stator is mounted for selective relative movement with respect to said landing hub when said landing hub is supported on the wellhead to selective advance and retract said cone with respect to said heads.
10. A wellhead removal apparatus from a downhole tubular, comprising:
a tubular cutter;
a motor supporting said cutter for selective cutting of the tubular;
a selectively extendable grip for support of said motor within the wellhead or the downhole tubular;
a mounting location of said grip is adjustable along the motor;
said motor is a progressing cavity type motor and said grip is attached to a stator on said motor and said cutter is mounted to a rotor of said motor;
only a crossover is connected between said cutter and said rotor.
11. A wellhead removal apparatus from a downhole tubular, comprising:
a tubular cutter;
a motor supporting said cutter for selective cutting of the tubular;
a selectively extendable grip for support of said motor within the wellhead or the downhole tubular;
a mounting location of said grip is adjustable along the motor;
said motor is a progressing cavity type motor and said grip is attached to a stator on said motor and said cutter is mounted to a rotor of said motor;
said grip further comprises a landing hub to engage the wellhead to locate said grip within or below the wellhead;
said grip comprises a plurality of fingers with grip heads and said motor comprises a cone selectively engageable with said heads to drive them radially outwardly for a grip.
12. The apparatus of claim 11 , wherein:
said cone is mounted to a stator portion of said motor;
said stator is mounted for selective relative movement with respect to said landing hub when said landing hub is supported on the wellhead to selective advance and retract said cone with respect to said heads.