US1799964A - Headache post - Google Patents

Description

April 7, 1931. WpEUSTlCE 1,799,964

HEADACHE POST Filed June 28, 1930 2 Sheets-Sheet 2 INVENTOR Patented Apr. 7, 1931 UNITED STATES 'WILLIAM EUSTICE, OF TULSA, OKLAHOMA COMPANY, OF PARKERSBURG,

ASSIGNOR TO PABKEBSBURG RIG & REEL WEST VIRGINIA, A CORPORATION HEADACHE POST Application. filed June 28,

This invention relates to headache or shock absorbing posts which are used in standard rigs or derricks for oil wells.

An object of this invention is to provide a headache post that is adjustable so that the height of the post may be altered to suit the particular stroke of the walking beam.

Another object of this invention is to provide a headache post having a resilient cap which will absorb shocks of the falling walking beam.

These and other objects which will be readily apparent to those skilled in this particular art I attain by means of the embodiment of this invention, which is described in the following specification and illustrated in the accompanying drawings, in which:

Fig. 1 is a partial view in perspective of a rig showing the improved headache post;

Fig. 2 is a view in perspective of the headache post;

Fig. 3 is a view in side elevation of the headache post;

Fig. 4 is a view in front elevation ofthe post;

Fig. 5 is a view in 5-5 of Fig. 2;

Fig. 6 is a top view of the headache post; and

Fig. 7 is an illustration of the U-bolt used to fasten the cap on the post.

A headache post 10 embodying this invention is shown in Fig. 1 in connection with a standard rig or derrick having a walking beam 11 carried in saddle 12 mounted on an upright or A-shaped post 13 called a Samson post. During the drilling operation, end 14. of the walking beam 11, to which the drilling tools (not shown) are attached, is oscillated by pitman 15'which connects end 16 of the section taken on line walking beam to crank 17 carried on the band wheel shaft 17*, which is driven directly by an engine or motor (not shown). Headache post 10 is located directly beneath the end 14: of the walking beam and limits its downward strokes. If the pitman 15 or crank 17 should break while drilling, post 10 catches the falling beam and prevents injury to the derrick, the cable supporting the tools in the well as well as the operators. Generally the head- 1930. semi No. 464,577.

ache post is of such a height that the walking beam barely misses its top at the end of its downward stroke. My improved headache post is made of steel and has a resilient cap for receiving the shock of the falling walking beam. The post 10 has a body section18 formed from an I-beam cut to the proper length. Riveted to the flanges of the body section 18 at the bottom of the post are angle members 19 having feet 20 extending laterally from the body section. The post is fastened to one of the sills of the rig or derrick by bolts extending through the openings 21 drilled in the feet 20 of the angle members 19 and is braced to the Samson post by a rigid strut 22. A cap 23, which is preferably made of wood, but which may be of any other suitable resllient material, is supported on the top of the body section by angle members 24: which are riveted on opposite sides of the web of the I-beam section between the flanges thereof. The angle members 24 lie on opposite sides of the body section and the tops of the upper flanges of the angle section 24 are flush with the top of the body section and extend in opposite directions from angle members 19 at the bottom of the body section or rather at right angles thereto. Cap 23 is secured in place on flanges 25 by a U-bolt 26 which extends downwardly through holes 27 drilled through the cap and holes 28 drilled in flanges 25 of angle members 24. The cross member 30 of the U-bolt lies within a groove formed in the top of cap 23.

It is obvious from the above description that the headache post is readily adjustable to suit the stroke of the walking beam. If the length of the walking beam stroke has been decreased, it is only necessary to loosen the nuts 29, raise the cap 23 and insert wood blocks 31 or other fillers between the cap and the top of the I-beam and the top faces of the angle members to bring the headache post to the proper height for that particular stroke of the beam. If the stroke of the walking beam has been increased, the reverse operation would take place and the fillers would be removed. The cap is of such thickness that with it in place on the body section, the post will be the proper height for the longest stroke of the walking beam. In using a Wooden cap or block on top of the post, the shock of the falling walking beam is absorbed much better than would be the case if a solid steel post were used. However, it is readily understood that a cap made of any resilient material may be used in place of wood.

Having disclosed my invention, what I claim as new and desire to secure by Letters Patent is:

A headache post for a drilling rig, having a vertical body section formed from an I- beam, angle members secured to the flanges of said body section for securing said body section rigidly to the rig base, angle members secured to the web of the body section on each side thereof and having the top surface thereof flush with the top of said I-beam, a resilient cap for said post, removable fillers between said cap and said angle members and a U-bolt countersunk in said cap having the legs thereof extending downwardly through openings in said cap, filler and angle members for securing said cap thereon.

In testimony whereof, I have hereunto subscribed my name this 13th day of June, 1930.

WVILLIAM EUSTIGE.

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