US2312126A - Shock absorber for use on walking beams of drill rigs - Google Patents

Description

SHOCK'ABS ORBER FOR USE ON WALKING BEAMS 0F DRILL RIGS Filed Sept. 14, 1942 2 Sheets-Sheet l A TTORNEYS.

Feb. 23, 1943. A. SHACKLVETTE SHOCK ABSORBER FOR USE ON WALKING BEAMS 0F DRILL RIGS Filed Sept-14, 1942 2 Sheets-Sheet 2 Awe/'2 Jzwcz'zezze INVENTOR.

ATTORNEYS.

Patented F eb. 23, 194-3 SHOCK ABSORBER FOR USE ON WALKING BEAMS OF DRILL RIGS Albert Shacklette, Jeffersontown, Ky.

Application September 14, 1942, Serial No. 458,286

2 Claims.

This invention relates to well drilling rigs, the primary object of the invention being to provide a rig having means to absorb the shocks and jars usually directed thereto, during the drilling operation of the rig.

Another important object of the invention is to provide a shock-absorbing device used on the walking beam of a drill rig, which will permit the use of a steel cable in connection with relatively small drill rigs, thereby appreciably increasing the efliciency of Well drilling rigs.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of con struction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein described, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings:

Figure l is a side elevational view of a, drill rig constructed in accordance with the invention.

Figure 2 is an enlarged plan view of the shockabsorbing device, forming the essence of the present invention.

Figure 3 is a longitudinal sectional view through the shock-absorbing device.

Figure 4 is a sectional view taken on line 4-4 of Figure 3.

Referring to the drawings in detail, the frame of the drill rig is indicated generally by the reference character 5, and comprises spaced parallel bars 6 and spaced upstanding bars I disposed at the rear end of the rig. Connecting the bars 1, is a shaft 8 on which one end of the Walking beam 9 is pivotally mounted, the forward end of the walking beam being disposed adjacent to the standards I that rise from the forward end of the rig frame and provide the support for the pulley I! mounted on the shaft l2, carried at the upper ends of the standards 10. Brace bars [3 extend from the side rails 6 and connect with the standards 16 at points adjacent to the upper ends thereof, bracing the standards NJ.

The reference character l4 designates the cable drum, on which the cable I is wound, the cable passing over the pulley I6, from where the cable operates over the pulley I! mounted in bearings carried by the walking beam 9. The cable also operates over the pulley l8 which is supported by the movable section is of the shockabsorber 20. From the pulley 18, the cable oper- II, from where it passes downwardly and connects with the drill tool 22.

The reference character 23 designates the power wheel, which is operated through any suitable means not shown, the wheel 23 being connected with the forward end of the walking beam 9, by means of the crank 25 and arm 25. Thus it will be seen that as the wheel 23 rotates, the walking beam will be moved vertically with the result that the cable will be also moved vertically operating the drill tool 22, to accomplish its purpose.

The shock-absorbing device comprises a cylindrical body portion 26 that has one of its ends closed, providing a housing for the fibre and rubber cushioning members 2? that are constructed to exactly fit within the closed end of the body portion 26.

The opposite end of the body portion is open, and allows the movable member [9 to move a short distance beyond the open end of the body portion. The movable member or section 19 embodies separable members, each of which is provided with a semi-circular end piece 28, the members I9 being cut-away providing a clearance for the pulley 18, which is mounted on the shaft 29. Thus it will be seen that when the semi-circular members 28 are placed together in a manner as shown by the drawings, circular heads are provided for movement within the cylindrical body portion.

Lugs 30 extend from the cylindrical body portion 26, and are formed with openings for the reception of the bolts 3|, which secure the cylindrical body portion to the walking beam 9.

From the foregoing it will be seen that due to the construction shown and described, the walking beam will operate to raise and lower the cable and drill tool, and that the sudden jar or shock usually transmitted to the drill rig, through the cable, will be absorbed by the shock-absorbing members 21, when the movable section is forced against the shock-absorbing members 21.

What is claimed is:

1. A drill rig including a walking beam and drill cable, a shock-absorber comprising a cylindrical body portion closed at one of its ends, mounted on the walking beam, a sectional member operating in the cylinder, a pulley held between the sections of the movable member and over which the cable operates, heads at the ends of the movable member, and yieldable members disposed between the head at one end of the movable member and closed end of the cylinder,

ates under the pulley 2| and then over the pulley and said yieldable members adapted to cushion the movements of the movable member and drill cable, during the drilling operation.

2. A drill rig including a walking beam and drill cable, a shock-absorber comprising a cylinder mounted on the walking beam, said cylinder having a slot in the side thereof, a movable member within the cylinder, a pulley mounted on the movable member and extending through the slot,

said drill cable adapted to operate over the pulley, yieldable members within the cylinder and against which one end of the movable member operates, cushioning the movements of the movable member and cable, during the drilling operation.

ALBERT SHACKLETTE.

Images