US1799171A - Operating mechanism for temper screws - Google Patents

Description

p l 7, 1931- F. v. KESSELMAN ET AL. 1,799,171

OPERATING MECHANISM FOR TEMPER SCREWS 'Filed May 7, 1930 2 Sheets-Sheet l April 7, 1931.

F. V. KESS ELMAN ET AL OPERATING MECHANISM FOR TEMPER SCREWS Filed May, 7, 1930 '2 Sheets-Sheet 2 aVENTORS w llt4Wllill\lmttllllllllllWW Patented Apr. 7, 1931 PATENT oFrlcs v FLOYD VeKESSELMAN'AND LOUIS r. KESSELMAN, or BUTLER, PENNSYLVANIA OPERATING MECHANISM non 'rnmrnza sonnws Application filed May 7, 1930. Serial 1%. 450,440..

Our invention relates to well drilling apparatus and more particularly to the operating mechanism for the temper or turn-down screws thereof.

In the drilling of wells with standard rigs, wherein the drill bit is supported from a drill line and reciprocated vertically by a walking beam, it is customary for the driller to let out or turn-down the drilling line periodically by a manually-operated screw as the drill bit penetrates the earthduring its up and down movement.

One object of our invention is to provide means whereby the drilling line is fed up or down automatically during oscillation of the walking beam to whichthe drilling line is secured.

Another object of our invention is to provide means whereby the drilling line is fed up or down through movement of and in direct relation to the oscillatory movements of the walking beam.

One form which our invention may take is shown in the accompanying drawing, wherein Figure 1 is a fragmentary view, in side elevation, of a standard drilling rig with our invention applied thereto; Fig. 2 is a view, on an enlarged scale, of a portion of the apparatus of Fig. 1; Fig. 3 is a cross-sectional view of a portion of the apparatus of Fig. 2, but on an enlarged scale; Fig. 4 is a view, on an enlarged scale, of still another portion of the apparatus of Fig. 1'; Fig. 5 is a sectional View taken at right angles to the view of Fig. 4, and Fig. 6 is a detailed plan view of a portion of the apparatus of Figs. 4 and 5.

In Fig. 1, a portion of a derrick is indi- 'rection, the pawl 26 will engage the teeth of cated by the numeral 8. A walking beam 9 is operated in the usualmanner from a band wheel 10 toef'fect reciprocation vertically of a drilling line 11, to the lower end of which a drill bit, not shown, is secured. The line 11 is connected to a temper screw 12 by means of a rope clamp 13, and the temper screw has threaded engagement with a screw frame 14, which is supported on the walking beam by a T-head or saddle member 15. These parts may be of any form well-known in the art.

During the drilling operation it is of course necessary to let out or feed down the drilling line. 11 periodically so that the bit will always effect slight penetration at the bottom of the hole during each down stroke thereof. Heretofore, this progressive feeding of the line has been efi'ected by means of a handle such as 16 that is connected to the screw 12 and which the driller turns from time to time as may be necessary, to rotate the screw in its frame lt, and thus .lower the line 11. As heretofore stated,our invention resides primarily in means for automatically eifecting lowering of the line, and to an extent in direct relation with'the degree of'oscillation of the beam, and hence renders unnecessary the manual loweringthereof by the driller.

To this end, we provide'means for rotating the screw 12 in its frame 14 slightly during the down stroke-of the bit.

On the beam 9, we mount arack bar 17 that is Slidably supported in'a slideway 18. The rear end of this rack bar is connected through a, link 19 toafixed supporting member20 that may be secured to apost 21 orotherwise suitably anchored to a point removed from the axis of oscillation of the beam 9. It will be seen that as the beam 9 is oscillated, the rack bar 17 willslide back and forth in its guideway 18.

A pinion 22 is mounted upon the walking beam and meshes with the rack bar 17 so that it will be oscillated during reciprocatory movement of the rack bar. The pinion 22 carries a" crank 23t0 which is connected a link 24 whose other end is connected to a crank 25 that carries a pawl 26.

Upon movement of the link 24 in one dia ratchet wheel '27 to effect ;rotative movement thereof, while during movement of the link 24 inthe opposite direction, the pawl will slideover the'teeth with an idling movement.

"The ratchet wheel 27 is secured to a share 28 position, movement of the ratchet wheel will effect rotationiof the gear wheel 29, and

a 29, the shaft 33 will be turned 'to rotate the screw 12 and lower the drilling line. In case it is desired to elevate the bit somewhat, the clutch will be shifted into engagement with the gear wheel 30 to eifect movement of the screw in the opposite direction.

The clutch 31 is shown as operated by a clutch yoke 35 which is in turn operated by a rocking lever 36, the lever 36 being provided with lines or pull rods 37 and 38 on its ends whereby it may be oscillated to slide the clutch from side to side. The clutch will ordinarily remain in operative relation with either of the gear wheels to which it has been moved and is shown as locked in neutral position by means of a latch 39 that is slidably mounted in a casingO. The latch is normally held in projected position to engage the clutch yoke by means of springs. A line or pullrod l1 is provided for withdrawing the latch 39 to permit movement of the yoke 35. A pair of latch bolts 42 are slidably mounted on the latch member 39 and are yieldably projected. The outer sides of these latch bolts are beveled so that when the yoke is being moved to neutral or intermediate positi'on, it will force one of the latch bolts backwardly and be stopped by the other one, it being necessary for the operator to pull the line 4 1 only when it is desired to move the yoke from its neutral position.

Vhile the invention has herein been described more particularly in connection with the feeding down of the drilling line, it is also quite useful in the pulling upof the drill line for distances that are permissible by the length of the screw. For instance, in case a bit becomes stuck in the hole, the screw can be letdown far enough to permit spread of the drilling jars whereupon it can be fed upward'ly to take up the slack in the jars and knock the bit loose. Furthermore, in the case of fishing? jobs, the screw can be automatically moved upwardly to jar the sticking toolsandgradually draw them from the well.

\Ve claim as our invention 4 -1. The combination witha walking beam and a drilling line, of vertically-adjustable meansfor supporting the line, a rack bar slidabl mounted on the beam and anchoredto a point removed from theaxis of o'scillationof the beam, a pinion meshing with the'rack, a 'crank-carriedby the pinion, and a link conn'ectionbetween the crank and said support- ;3 ing meansforeft'ectingverticalmovementof said means during oscillation of the walking beam.

2. The combination with a walking beam and a drilling line, of a rotatable screw for supporting the line, a ratchet Wheel operative to rotate said screw, a pawl cooperating with said ratchet wheel, a rack bar slidably mounted on the beam, a )inion meshing with the rack, a crank carrie by the pinion, and a link connection between the crank and said pawl for oscillating said pawl during oscillation of the walking beam.

3. The combination with a walking beam and a drilling line, of rotatable means for supporting the line, a rack bar member mounted for movement longitudinally of itself and of the beam, a pinion member meshing with the rack bar, one of said members being mounted on the walking beam, a link connecting the last-named member to a point removed from the axis of oscillation of the beam, and a link connection between the other member and the said supporting means for eifecting rotative movement thereof during oscillation of the beam, the link connection to the pinion member being eccentric thereof.

In testimony whereof we, the said F LOYI) V. KEssnLMAN and LOUIS P. KEssELMAN have hereunto set our hands.

FLOYD V. KESSELMAN. LOUIS P. KESSELMAN.

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