Apparatus for handling tubulars
A method and apparatus for facilitating running or pulling tubulars from a well bore whereby the manual operations or functions normally performed by a human are undertaken by the THD and may including remote control or manipulation. The THD comprises an elevator assembly (THD) with a main body consisting of upper and lower plates, a scissor assembly and multiple sized die blocks to conform to the tubular diameter. The THD can be used as a transfer elevator to position the tubular for engagement by the make-up assembly, can be outfitted to perform as a safety clamp or restraining device and also configured as a tubular stabbing arm as required by the operation.
1. A tubular handling device comprising:
a body having a mostly “U” shaped profile which is shaped to accept an oilfield tubular into a throat area;
two or more scissor plates with overlapping tips, each tip configured for disallowing the scissor plates to open once encompassing a tubular, configured between an upper and lower body plate, whereby each scissor plate rotates about a fixed axis and where each scissor plate is supported by bushings and each said scissor plate is hydraulically or pneumatically actuated to open and close around a tubular;
a die retainer secured to each scissor plate;
a die block secured to each die retainer, wherein each die block is configured to be readily replaced to accommodate a range of tubular outside diameters or profiles;
a die retainer clip inserted through a transverse slot of the die retainer to secure the die block to the die retainer; and
a control console for remote operation of all functions of the tubular handling device.
2. The tubular handling device of claim 1 wherein the bushings are made of: carbon steel, stainless steel, aluminum, bronze, brass, aluminum-bronze, fiber reinforced composite material, or a combination thereof.
3. The tubular handling device of claim 1 wherein the tubular handling device is configured to be used as a transfer elevator and link arms are attached to the tubular handling device.
4. The tubular handling device of claim 3 , wherein one or more shock dampening cylinders are connected between the tubular handling device and the link arms and configured to maintain a mostly perpendicular orientation between the tubular handling device and the link arms while allowing a given degree of freedom to rotate.
5. The tubular handling device of claim 1 wherein the tubular handling device is configured to be used as a safety clamp.
6. The tubular handling device of claim 1 wherein the tubular handling device is configured to be used as a tubular stabbing mechanism.
7. The tubular handling device of claim 6 wherein hydraulic or pneumatic cylinders are utilized, thereby providing the operator precise control of the orientation of the tubular handling device in relation to the link arms.
8. The tubular handling device of claim 1 whereby the function between the tubular handling device and a spider or flush mounted spider, an elevator or casing make-up tool attached to the top drive, Kelly hook or a power swivel, link arms are controlled by a safety interlock system.
9. The tubular handling device of claim 1 wherein the body utilizes a bolted or welded construction.
10. The tubular handling device of claim 1 , wherein the body is manufactured utilizing standard machining practices and plate cutting techniques comprising torch cutting, plasma cutting, laser cutting, and water-jet cutting thereby eliminating the need for castings.
11. The tubular handling device of claim 1 wherein a hole protrudes through the upper and lower plates or body of the tubular handling device and aligns with a hole in the tips of the scissor plates thereby causing the holes to coincide, allowing for placement of a mechanical pin disallowing the scissor plates to open once encompassing a tubular.
12. The tubular handling device of claim 1 wherein the die blocks have a profile or load bearing shoulder matching that of the tubular to be hoisted or constrained.
13. The tubular handling device of claim 1 , further comprising a latch mechanism located proximate to and between rotating axes of each of the scissor plates, wherein the latch mechanism is configured to disallow the scissor plates from opening once encompassing the tubular.
14. The tubular handling device of claim 13 , further comprising a visual latch indicator configured to provide an indication as to a position of the latch mechanism.
15. The tubular handling device of claim 1 , each tip further comprising a hole coinciding with a hole in the other tip for optional placement of a mechanical pin for disallowing the scissor plates to open once encompassing a tubular.
16. A drilling or workover rig comprising:
a tubular handling device comprising:
a body having a profile configured to accept an oilfield tubular into a throat area;
two opposed scissor plates each configured to rotate about a fixed axis, wherein each scissor plate is supported by bushings and each said scissor plate is hydraulically or pneumatically actuated to open and close around the oilfield tubular;
a die retainer secured to each scissor plate
a die block secured to each die retainer, wherein each die block is configured to be readily replaced to accommodate a range of tubular outside diameters or profiles; and
one or more link arms attached to the tubular handling device and configured to be manipulated to pivot via cylinders;
one or more shock dampening cylinders connected between the tubular handling device and the one or more link arms, wherein the shock dampening cylinders are configured to maintain the tubular handling device in a substantially perpendicular position relative to the link arms,
wherein the tubular handling device is operable from a control console for remote operation of all functions wirelessly or via touch screen to latch onto a tubular and raise the tubular to a substantially vertical position.
17. A method of handling a tubular using a tubular handling device in an automated manner, the device comprising a body having a profile configured to accept the tubular into a throat area, two opposed scissor plates configured to rotate about a fixed axis, a die retainer secured to each scissor plate, and a die block secured to each die retainer, the method comprising:
attaching the tubular handling device to one or more link arms;
attaching shock dampening cylinders between the tubular handling device and the link arms;
selecting die blocks configured or sized to accommodate the tubular diameter or profile;
operating the tubular handling device from a control console, and latching onto a tubular with scissor arms of the tubular handling device, and raising the tubular to a substantially vertical position; and
maintaining a substantially perpendicular orientation between the tubular handling device and the link arms while allowing a given degree of freedom to rotate.