US1451700A - Sucker-rod-elevating device - Google Patents

Description

Apr. 17, 1923.

P. G. KILDOW SUCKER ROD ELEVA'IING DEVICE- Filed Apr. 27, 1921 Patented Apr. 17, 1923.

PICKEIT G. KILDOV], OF IOWA PARK, TEXAS.

SUCKER-BOD-ELEVATiNG DEVICE.

Application filed April 27, 1921. Serial No. 465,013.

T 0 all whom it may concern:

Be it known that I, Prorrnr'r Gr; KILDow, citizen of the United States, residing at Iowa Park, in the county of Wichita and State of Texas, have invented certain new and useful Improvements in Sucker-Rod- Elevating Devices, of which the following is a specification.

This invention relates to a sucker rod elevating device for deep well pumps, being particularly designed for use in connection with oil well pumps, and has as one of its principal objects to provide a device of this character wherein a sucker rod may be locked against displacement from the device to fall back into the well.

The invention has as a further object to provide a device wherein the latch employed will, when upward pull is exerted upon the device, be positively moved to closed position blocking disengagement of the sucker rod from the device.

And the invention has as a still further object to provide a device wherein, when the latch. is shifted, said latch will be automatically locked in closed position so that even though upward pull upon the device 1s relieved, the latch will, nevertheless, be held to block disengagement of the sucker rod from the device.

Other and incidental objects will appear hereinafter.

In the drawing:

Figure l is a plan view showing the ball. of the device swung to one side.

Figure 2 is a sectional view illustrating the locking member of the device in active position, and a Figure 3 is a transverse section on the line 8-43 of Figure 2, looking in the direction of the arrows.

In carrying the invention into efiect, I employ a hook-shaped body member 10 having a slot 11 therein and formed on the end of the shank of said body member is a trunnion 12. Threaded into the body member opposite said trunnion is a cap bolt 13 providing a second trunnion and swingingly connected with the body member by said trunnions is a bail 14: having an eye 15 so that the usual swiveled hook of a cable may be readily connected with said bail. As particularly shown in Figure 1, the arm of the bail engaged with the cap bolt 13 is provided at its inner side with a beveled face 16.

Pivoted at a point between its ends upon the body member 10 at its upper side is a latch 17 and pivotally connected at one end to said latch is a pitman 18, the outer end portion of which is, as shown in Figure 3, enlarged. to ride against the upper face of the body member and is slidably connected with said member by a pin 19 extending through a suitable slot in the pitman. At its outer end, the pitman is provided with a beveled face to coact with the beveled face 16 of the bail. Secured at one end to the forward end portion of the pitman is a coil spring 20 the opposite end of which is en gaged with a hoolr 21 upon the body memher. 7 normally holding the latch 17 in open position, as shown in Figure 1, lying at one side of the slot 11 in the body member engaged at its outer end with a stop pin 22 upstanding from the bill of the body member. Formed in the bill of the body member at its upper side is a slot or recess 23 and secured at one end in said slot is a spring detent or locking member 2 projecting beyond the periphery of the body member so that said locking member may be readily grasped. As will be noted, the locking member 24 normally projects at its outer end portion above the upper face of the body member to coact with the latch 17 as shall be later explained, and is arranged to ex tend beneath the latch, when the latch is in open position. as shown in Figure 1, so that the latch may, without interference by the locking member, be swung across said member.

is well known. the sucker rods of deep well pumps are composed of a plurality oi. sections, such as suggested. in the drawing at 25, the sections being threaded together at their meeting ends. Near their ends, the sections are usually provided with squared portions and are further formed with terminal heads. The operation of disassembling a rod isaccomplished by elevating the rod say for the length of one of its sections, when the section exposed at the top of the rod is unthreaded from the next adjacent section, the rod being then again elevated to expose the next section, and so on until all of the sections have been detached. .Heretofore, considerable difficulty has been experienced with the ordinary elevating devices employed in. that no means is provided for 104 1::-

This spring acts upon the pitma-n for ing the sucker rod against accidental release. Consequently, it very often happens that in unthreading a section of the rod, the rod slips from the elevating device and falls back into the well. This, of course, not only occasions delay and danger but also involves considerable expense since is then necessary to fish the rod out or the well. The present invention, accordingly, seelrs to oven come these disadvantages. In o iieration, the bail 14 of thedevice is first swung to one side; is shown in Figure 1, when the body member is, as illustrated in Figure 3, engaged beneath the head oi the uppermost section of the rod. the squared portion of the rod being received in the slot ll. Upward pull upon the bail for elevating the rod will then serve to swing the bail to a vertical position with respect to the body member so that the beveled: face 16 of the bail will be caused to ride against.- the beveled outer end of the pitman 18 for shitting the pitman longitudinally and swinging; the latch 17 to closed position behind 0 rod.

As soon as the end the latch rides over the locking; member 94-, this member will, as shown in Figure 2, spring upwardly behind the latch for automatically locking:- the latch closed. Thus, as will be seen, pull upon the device will initially serve to positively move the latch to closed position when the latch will then be locl c l closed so that even though upward strain upon the device is relieved, manipulation oi the rod in the operation oidetaching one o? the sections cannot serve to cause disengage ment of the rod from the device. However. when it is desired to release the device, the locking member 4: may, after the bail. has been swung to one side, simply be depressed when the spring; 20 will operate to immediately shift the latch to open position. l accordingly provide a hipjhly ellicient con struction for the purpose set forth. and :1 device which, in actual practice. will. not only avoid the loss of a great deal of time of the bail will shift the latch to closed position, and means on the body member independent of the ail and shifting means to loch the latch in closed position.

2. A sucker rod elevating device including a body member, a latch pivotec. thereon and movable to closed position for locking; a rod engaged with the body member, a pitn'ian slidably mounted on the body member and connected to said latch, a bail pivotally connected with the body member and con structed to actuate said pitman whereby to shi'tt the latch to closed position.

A. sucker rod elevating: body member, a. latch pivoted thereon and movable to closed position for locking a rod on used with the body member, pitman slidably mounted on. the body member and connected to said latch, and a bail swing);- ing ly connected to the body member and provided with a beveled face bearingagainst the outer end of the pitman or shitting the latch to closed position.

4. A. sucker rod elevating device including: body member, latch pivoted thereon and movable to closed position for locking a rod engaged with the body member, a pitman connected to said latch, a bail swinginp ly connected to the body member and provided with a beveled face to coact with the pitman for shifting the latch to closed position. and spring locking member movable into the path oi the latch in the rear thereof for automatically lockin the latch closed.

In testimony whereof I' afilx my signature.

PIOKETT G. KILDOW. 1,. 5.

device including

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