Elevator and spider converter
AssigneeFrank's Casing Crew and Rental Tools, Inc.
InventorsDonald E. Mosing, David L. Sipos
Life of this patent
Estimating the term…
Abstract
Shaped plates are provided, one above each side of a spider, to replace the bails and links used to suspend the spider and its pipe payloads. The load applied to the housing suspension hard points, whether ears or lugs, to suspend the spider is transferred to the rig floor by the plates. The plates are preferably shaped to balance about a cross pin situated in a cross bore in the plates. The plates are not inclined to tilt whether being hoisted or loaded by the spider. The spider is submerged into the rotary opening and results in reduced height of pipe string connections to be worked.
Claims19
A converter apparatus for resting on a rig floor, with arrangements to suspend a spider, having lifting attachment means, in the opening of a rotary table, the apparatus comprising:
- a) a load distribution structure with means to bear on said rig floor, with means to accept pipe loads from the lifting attachment means of said spider and suspend said spider below said structure in the opening of said rotary table;
- and
- b) connection means adapted to connect said lifting attachment means on said spider and said means to accept pipe string loads on said load distribution structure.
A converter apparatus for resting on a rig floor and suspending a pipe string handling spider in the opening of the rotary table of a drilling rig, the spider housing having upwardly extending lugs for securing the traveling block lifting links, the apparatus comprising:
- a) said pipe string handling spider with a plurality of said upwardly extending lugs;
- b) a horizontally distributed suspension platform comprising two partial plates, each plate having openings to accept said upwardly extending lugs on said spider housing and a cross channel arranged to accept at least one laterally movable pin aligned to pass through the eyes of said lugs;
- and
- c) said movable pin, at least one in each said partial plate, sized to rest in said cross channel and penetrate said eyes.
A converter apparatus for resting on a rig floor and suspending a pipe string handling spider in the opening of the rotary table, the spider having ears for engagement with bails for lifting, the apparatus comprising:
- a) said pipe string handling spider with one said ear on each side;
- b) a clevis shaped shackle, with aligned holes on the adjacent ends for a closing pin;
- c) a horizontally distributed suspension platform comprising two partial plates, each plate having openings to accept said shackle and a cross channel arranged to accept a laterally extending pin aligned to penetrate said aligned holes;
- and
- d) said movable pin, at least one in each partial plate, sized to rest in said cross channel and extend through said aligned holes when said shackle is situated to suspend said spider by said ears.
A spider converter apparatus for resting on a rig floor and providing means to suspend either of two types of spiders, one type with load-bearing ears on the sides, each ear engaged by a shackle having adjacent ends with aligned holes extending, as load bearing elements, upwardly therefrom, and another type with lugs with aligned holes on each side of the spider, as load bearing elements, extending upwardly from the spider housing, the apparatus comprising:
- a) a horizontally distributed base comprising two generally similar partial plates, each plate having openings to accept the load bearing elements extending from the spider being suspended, and a cross channel situated to carry a pin for alignment with said aligned holes in said lugs, said partial plates shaped such that when attached to said assembly they, collectively, provide an open center area for the passage of a vertically situated pipe string;
- and
- b) at least one cross pin situated in said cross channel in each said partial plate to engage said holes in said load bearing elements when they are in said openings.
A converter apparatus for resting on a rig floor, with arrangements to suspend a spider, having lifting attachment means, in the opening of a rotary table, the apparatus comprising:
- a) a load distribution structure with means to bear on said rig floor, with means to accept pipe loads from the lifting attachment means of said spider and suspend said spider below said structure in the opening of said rotary table;
- and
- b) connection means adapted to connect said lifting attachment means on said spider and said means to accept pipe string loads on said load distribution structure;
- c) said load distribution structure comprising two generally similar partial structures, each attached to at least two said lifting attachment means on said spider.
A converter apparatus for resting on a rig floor, with arrangements to suspend a spider, having lifting attachment means, in the opening of a rotary table, the apparatus comprising:
- a) a load distribution structure with means to bear on said rig floor, with means to accept pipe loads from the lifting attachment means of said spider and suspend said spider below said structure in the opening of said rotary table;
- and
- b) connection means adapted to connect said lifting attachment means on said spider and said means to accept pipe string loads on said load distribution structure;
- c) said lifting attachment means including ears on said spider and a shackle to engage said means to accept pipe string loads.
Dependencies are inferred from the claim text.