Hoisting apparatus and method for raising oil tubing

Claim 2

A hoisting apparatus, comprising: a support frame; a first telescoping boom assembly mounted on said support frame, including a first secured member and a first extending member oriented to extend in a first direction; a second telescoping boom assembly mounted on said first boom assembly and secured to said first extending member, for movement therewith, said second telescoping boom assembly having a lifting upper end and a lower end from which a second extending member is adapted to extend in a direction parallel to but opposite from said first direction; support legs secured to said lifting upper end and positionable to contact the ground surface; pulley means having cable receiving means for receiving a lifting cable for allowing a lifting cable to ride thereon and movably depend from said lifting upper end; and a lifting cable extending from the extended free end of said second extending member over said pulley means and depending therefrom, whereby said first extending member can be extended to position said lifting cable over the object to be lifted and said second extending member can be extended to pull on said lifting cable and raise the depending portion thereof.

Claim 3

An apparatus as defined in claim 1, wherein said pulley means is a first pulley means and said second telescoping boom assembly includes a second pulley means mounted for movement with said second boom assembly and having cable receiving means for receiving said lifting cable for allowing said lifting cable to ride thereon and for changing the direction of travel of said lifting cable at the extended free end of said second extending member, said lifting cable extending from a secured portion of said second telescoping boom assembly around said second pulley means and to said first pulley means, whereby the position of said second pulley means relative to said first pulley means is independent of the extension of said first telescoping boom assembly.

Claim 4

The apparatus as defined in claim 2, further comprising a working cable supply drum with a working cable thereon rotatably mounted on said support frame; a third pulley means having cable receiving means for receiving said working cable and for allowing said working cable to extend from said supply drum and to ride thereon and movably depend from said lifting upper end, said third pulley means and said first pulley means being mounted coaxially on said second telescoping boom assembly lifting upper end.

Claim 5

The apparatus as defined in claim 3, wherein said third pulley means includes a first working pulley and a second working pulley coaxially mounted on a shaft.

Claim 6

The apparatus as defined in claim 4, further comprising clamping means for clamping onto and securing the hoisted object to said lifting upper end other than by said lifting cable and for allowing said lifting cable to be disconnected from the hoisted object, said clamping means depending from said lifting upper end and positioned beneath said first pulley means.

Claim 7

The apparatus as defined in claim 5, wherein said clamping means includes a bowl element secured to said lifting upper end and a set of clamping inserts, said bowl element having an aperture extending vertically therethrough, at least the upper portion of said aperture being generally frusto-conical in configuration so as to have angled sides, said clamping inserts each having an overall arcuate configuration with a generally downwardly tapered thickness corresponding to said angled sides, whereby the lifted object may pass through said aperture and said inserts slid down into said aperture until said angled sides cause said tapered inserts to converge and securely clamp onto the lifted object.

Claim 8

The apparatus as defined in claim 6, wherein said support frame is mounted on a motor vehicle.

Claim 9

The apparatus as defined in claim 1, further comprising a working cable supply drum with a working cable thereon rotatably mounted on said support frame; working pulley means having means for receiving said working cable and for allowing said working cable to extend from said supply drum and to ride thereon and movably depend from said lifting end, said working pulley means and said first pulley means being mounted coaxially on said second telescoping boom assembly lifting upper end.

Claim 10

The apparatus as defined in claim 8, wherein said working pulley means includes a first working pulley and a second working pulley coaxially mounted on a shaft.

Claim 11

The apparatus as defined in claim 1, further comprising clamping means for clamping onto and securing the hoisted object to said lifting upper end other than by said lifting cable in order to allow said lifting cable to be disconnected from the hoisted object, said clamping means depending from said lifting upper end and positioned beneath said first pulley means.

Claim 12

The apparatus as defined in claim 10, wherein said clamping means includes a bowl element secured to said lifting upper end and a set of clamping inserts, said bowl element having an aperture extending vertically therethrough, at least the upper portion of said aperture being generally frusto-conical in configuration so as to have angled sides, said clamping inserts each having an overall arcuate configuration with a generally downwardly tapered thickness corresponding to said angled sides, whereby the lifted object may pass through said aperture and said inserts slid down into said aperture until said angled sides cause said tapered inserts to converge and securely clamp onto the lifted object.

Claim 13

A vehicle for raising an oil tubing string, comprising: a support frame mounted on the vehicle; a first telescoping boom assembly mounted on said support frame, including a first secured member and a first extending member oriented to extend in a first direction; a second telescoping boom assembly mounted on said first boom assembly and secured to said first extending member for movement therewith, said second telescoping boom assembly having a lifting upper end and a lower end from which a second extending member is adapted to extend in a direction parallel to but opposite from said first direction; first pulley means having means for receiving a lifting cable and for allowing a lifting cable to ride thereon and movably depend from said lifting upper end; a lifting cable extending from the extended free end of said second extending member to said first pulley means and depending therefrom to an oil tubing connector; second pulley means mounted on said second extending member and having means for receiving a lifting cable and for allowing said lifting cable to ride thereon and for changing the direction of travel of said lifting cable at the extended free end of said second extending member, said lifting cable extending from a secured portion of said second telescoping boom assembly around said second pulley means and to said first pulley means, whereby said first extending member can be extended to position said lifting cable over the tubing and said second extending member can be extended to raise said lifting cable and connected tubing and the position of said second pulley means relative to said first pulley means is independent of the extension of said first telescoping boom assembly.

Claim 14

A vehicle for raising an oil tubing string, comprising: a support frame mounted on the vehicle; a first telescoping boom assembly mounted on said support frame, including a first secured member and a first extending member oriented to extend in a first direction; a second telescoping boom assembly mounted on said first boom assembly and secured to said first extending member for movement therewith, said second telescoping boom assembly having a lifting upper end and a lower end from which a second extending member is adapted to extend in a direction parallel to but opposite from said first direction; first pulley means having means for receiving a lifting cable and for allowing a lifting cable to ride thereon and movably depend from said lifting upper end; a lifting cable extending from the extended free end of said second extending member to said first pulley means and depending therefrom to an oil tubing connector; second pulley means mounted on said second extending member and having means for receiving a lifting cable and for allowing said lifting cable to ride thereon and for changing the direction of travel of said lifting cable at the extended free end of said second extending member, said lifting cable extending from a secured portion of said second telescoping boom assembly around said second pulley means and to said first pulley means, whereby said first extending member can be extended to position said lifting cable over the tubing and said second extending member can be extended to raise said lifting cable and connected tubing and the position of said second pulley means relative to said first pulley means is independent of the extension of said first telescoping boom assembly.

Claim 15

A vehicle as defined in claim 12, further comprising a working cable supply drum with a working cable thereon rotatably mounted on said support frame; a working pulley means having a means for receiving a working cable and for allowing said working cable to extend from said supply drum and to ride thereon and movably depend from said lifting end, said working pulley means and said first pulley means being mounted coaxially on said second telescoping boom assembly lifting upper end.

Claim 16

A vehicle as defined in claim 13, further comprising clamping means for clamping onto and securing the hoisted object to said lifting upper end other than by said lifting cable and for allowing said lifting cable to be disconnected from the hoisted object, said clamping means depending from said lifting upper end and positioned beneath said first pulley means.

Claim 17

A vehicle as defined in claim 12, further comprising support legs secured to said lifting upper end and positionable to contact the ground surface.

Claim 18

A vehicle as defined in claim 15, further comprising clamping means for clamping onto and securing the hoisted object to said lifting end other than by said lifting cable and allowing said lifting cable to be disconnected from the hoisted object.

Claim 19

A vehicle as defined in claim 12, further comprising a working cable supply drum with a working cable thereon rotatably mounted on said support frame; working pulley means having means for receiving said working cable and for allowing said working cable to extend from said supply drum and to ride thereon and movably depend from said lifting end, said working pulley means and said first pulley means being mounted coaxially on said second telescoping boom assembly lifting upper end.

Claim 20

A vehicle as defined in claim 12, further comprising clamping means for clamping onto and securing the hoisted object to said lifting upper end other than by said lifting cable in order to allow said lifting cable to be disconnected from the hoisted object, said clamping means depending from said lifting upper end and positioned beneath said first pulley means.

Claim 21

A vehicle as defined in claim 18, wherein said clamping means includes a bowl element secured to said lifting upper end and a set of clamping inserts, said bowl element having an aperture extending vertically therethrough, at least the upper portion of said aperture being generally frusto-conical in configuration so as to have angled sides, said clamping inserts each having an overall arcuate configuration with a generally downwardly tapered thickness corresponding to said angled sides, whereby the lifted object may pass through said aperture and said inserts slid down into said aperture until said angled sides cause said tapered inserts to converge and securely clamp onto the lifted object.

Claim 24

The method of claim 20, further comprising, providing a clamping means that depends from the lifting upper end and is positioned beneath the first pulley means for clamping onto and securing the hoisted object in a raised position independent of the lifting cable, raising the lifting cable through the clamping means and clamping the tubing in the clamping means to support the tubing independent of the lifting cable.

Claim 25

The method of claim 21, wherein said clamping step includes providing a slip holding device comprising a bowl element and a set of clamping inserts, the bowl element having an aperture extending vertically therethrough, at least the upper portion of the aperture being generally frusto-conical in configuration so as to have angled sides; raising the tubing through the aperture; and sliding the inserts down into the aperture until the angled sides cause the tapered inserts to converge and securely clamp onto the tubing.

Claim 26

The method of claim 22, further comprising providing a supply drum of working cable; feeding the working cable from the supply drum over the first pulley means and down into the oil well casing.