US1668649A - Tube or rod pulling mechanism - Google Patents

Description

May 8, 1928.

I R. c. MASON TUBE OR ROD PULLING MECHANISM I r I I Filed Nov. 20. 1925 2 Sheets-Sheet 1 INVENTOR ATTORNEY Patented May 8, 1928.

UNITED STATES PATENT OFFICE.

RICHARD C. MASON, F TULSA, OKLAHOMA SSIGNOR TO THE MASON CORPORATION,

OF TULSA, OKLAHOMA, A CORPORATION OF OKLAHOMA.

TUBE 0R ROD PULLING MECHANISM.

a lication filed November 20, 1925. Serial No. 70,330.

My invention relates to tube or rod pulling mechanism, and more particularly to mechanism adapted for pulling or letting in the tubing and sucker rods of an oil well when it is necessary to open the well for cleaning or repairs, the principal object of the invention being to effect a substantially continuous pulling or letting in operation, thereby avoiding the loss of time ordinarily caused by idle returns of the elevatoror rod hook, and wear on the engine incidentto speed changes.

It is also an object of the invention to provide a mechanism of this character which may be adjusted for higher power, but lower-speed to adapt it for pulling heavy casing.

In accomplishing these and other objects of the invention I have provided improved details of structure, the preferred forms of which are illustrated inthe accompanying drawings, wherein z 1 is a perspective view of an oil well derrick equipped with my improvements, illustrating the operation of pulling, or letting in tubing. i

Fig. 2 is a plan. view of my improved operating mechanism.

Fig. 3 is a detaihperspective View of the same.

Referring more in detail to the drawings: 1 designates a derrick of any ordinary type, comprising a platform 2, header 3, crown block 4, pulleys 5 and 6 mounted on the crown block, a tubing board 7 with its finger board 8, and a bull wheel 9 which may be operated from any suitable source (not shown).

Mounted on the derrick platform is a base 10 preferably consisting of a U-shaped frame 11 of I-beam construction, and an auxiliary rail 12 parallel with and spaced from the base of the frame 11 and connected therewith by bolts 13 and bars 14, the frame members being bolted to the derrick platform to anchor them firmly thereon.

Mounted on the base of the U-frame 11 and on the auxiliary beam 12 are bearing blocks 15 and 16, rotatably mounting a :31) shaft 17 which is extended beyond the base beam and there provided with a sprocket wheel 18. v

The sprocket wheel 18 is operatively connected with a sprocl'ret wheel 19 onthe bull whee shaft by a chain belt 20 which fee of power nishes power for driving my operating mechanism.

Mounted at each end of the frame 10 is a pair of bearing blocks 21-22, 21'22, andqournalled in said bearing blocks are shafts 2323'.

Fixed to the shafts 2323', are spooling drums 24 -2 1 and sprocket wheels 2525.

Running over the sprocket wheels 2525' and over mating sprocket Wheels 26-26' fixed on the shaft 17, are sprocket chains 27-27, the sprocket wheels 25 and 25, 26

and 26 being of the same diameter and tooth measure so that the spooling drums 24 and 24 are driven synchronously at the same rate of travel, and in the same direction, in fact, the spooling drum sets are duplicates of each other, the only difference belng in direction of travel of the ropes running thereover, as presently described.

Also fixed on the main shaft 17 is a brake drum 28 equipped with a brake band 29 operable by a lever 28 in the same manner as similar structures in general use.

Fixed to each of the spooling drums is a rope titl -30 which is run over a correspending pulley 5 or 6 at the top of the derrick from the outside so that the loose ends of the ropes hang substantially over the center of the well, each rope-being provided at its loose end witha book 31.

32 designates a casing head of the well in connection with which the mechanism is used, and 33, 34 and 35 are elevators of a typecommonly used in oil well operation, connecting the cable with the tubing 36 by engagement of the clamp member of the elevator beneath the tubing collars 37.

While I have described conventional ele ments of an oil well derrick and parts used in oil well operation, reference to specific elements is for purpose of illustration and explanation only, as other specific devices for performing the same or like functions may be substituted, as for instance a sucker rod hook may be used in place of the tubing elevators or spiders herein illustrated and specifically mentioned.

Assuming the parts to be constructed and assembled as described the operation in pulling tubing is as follows An elevator is applied to the upper joint of tubing so that its clamp part engages under the tubing collar and the tubin'" is supported by the clamp from the o the cas ing head. One of the lines 30 or 30, as for instance the line 30, is let down so that its hook 31 may be engaged in the elevator bail and power is applied to the mechanism to rotate the spooling drums and wind the rope 30 on the drum 2 f, winding of the rope on the drum 24 raising the tubing until one or more joints of tubing have been lifted out of the well, and the collar of a succeeding joint exposed above the casing head. Simultaneously withwinding of the rope 30 on the drum 24;, the rope 30 is let out from drum 24 so that the hook 31 on the rope 30 will reach the level of the. casins head as the top of the upper joint of pipe rises above the tubing board. lVhen the parts have reached these positions, operation of the mechanism is stopped, the elevated joints are unscrewed from the tubing remaining in the well, and another elevator applied beneath the exposed collar on the tubing in the well. An operator on the platform then swings the joints to a corner of the derrick, and slack is let into the rope 30 to rest the removed joints on the platform so that the operation on the tubing board may release the elevator from the upper joints. While the operator above is disposing of the disconnected tubing, an operator on the platform hooks the rope 30 to the elevator supporting the tubing in the well and then the operation just described is repeated, except that the spooling drums are reversed to wind the rope 30 and let out the rope 30, so that when the next joints of tubing have been raised to the proper elevation, the hook on th rope 30 will be back at the casing head ready for connection with an elevator which has been applied to the next joint of pipe, the operations described being repeated until all of the tubing has been removed from the well.

The same operation is employed for removing sucker rods, the only difference being in the detail construction of the elevator or clamping member.

Vhen the well has been cleaned, the tubing and sucker rod joints may be picked up and successively connected and lowered into the well.

disconnected.

It is apparent that with a mechanism en1- bodying my improvements a considerable saving of time may be effected, for the reason that there is no idle travel of the ropes to return the hooks to position for connection with the elevators, the hook on one rope returning up or down while that on the other is lifting or lowering.

It is also apparent that strain on the englue and working parts, due to increased speed during the returning travel, is obviated, and that consequently the tubing and rods may be pulled or let in much more quickly and with less strain on the working parts than with the mechanism heretofore ordinarily employed for such purposes.

\Vhile I have illustrated my improvements in connection 'ith a drilling derrick, a light pumping derrick, gin pole or other structure capable of su iporting weight of the tubing and rods may be substituted for the heavier structure after the well has come in.

Vhat I claim and desire to secure by Letters-Patent is In combination with an oil well derrick or the like, a base fixed to the platform c'omprising a U-shaped frame and a rail spaced from the base of the frame, bearing members mounted at opposite ends of the frame, shafts journalled in said bearings, drum and a sprocket wheel fixed to each of said shafts, intermediate bearing members mounted on the base of the frame and on said rail, a shaft journalled in said intermediate bearing members, sprocket wheels fixed on said intermediate shaft, chain belts run over mating sprocket Wheels on the siooling drum and intermediate shafts, a brake drum on said. intermediate shaft, a brake band for said brake drum, means for operating the brake band, means for rotating said intermediate shaft, pulleys on the top of the derrick, and a rope fixed to each of the spooling drums and run over a corresponding pulley whereby loose ends of the ropes are respectively raised and lowered upon rotation of the intermediate shaft.

In testimony whereof I affix my signature.

RICHARD G. MASON.

spooling t.

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