US1423937A - Tubing bleeder - Google Patents

Description

- .G. 0 moms AND A. LARSON.

TUBINGBL EEDER.

APPLICATION FILED AUG-8, 1921- Patented July 25, 1922.

INVENTORS. 6. 6 1/? 0M: A 4 az-wr A Aws o/v A TTORNEYJ- enonen o. IRONS, or McKrTrnIoK,

Ann ALBERT LARSON, or BAKERSFIELD, CALI- 'FOBN'IA.

TUBING BLEEDER.

To all whom it may concern Be it known that we, GEORGE C. Irons and ALBERT LARSON, citizens of the United States, and residents, respectively, of Me-- Kittriclr, county of Kern, State of California, and Bakersfield, county of Kern, Stateof California, have invented a new and useful Improvement in Tubing Bleeders, of which the following isa specification.

The present invention relatesto improvements in tubing bleeders and is particularly designed to be used in connection'with deep well pumps, as for instance, oil pumps. Its object is to provide a mechanism whereby the oil or fluid collected in the pump tubing above the liquid lifting means can be drained.

' with the device, Figure 1 a transverse section through the casing and tubing along line 44 of Figure 1, parts being broken away, Figure 5 a side elevation ofa valve controlling device used in the tubing bleeder.

Referring to the drawings in detail, the tube (1), of which only a short portion is shown in the drawing, is part of the tubing of a deep well pump from which it is desired to drain the oil or liquid contained win the same. A corresponding portion of the well casing (2) is shown in the drawing of Figure 1. The tubing (1) has attached thereto a longitudinal housing (3), shown in cross-section in Figure 4, in which the bleeding device is enclosed. This housing accompanies the tubing for some distance and is water tightly secured to the same so that no oil or liquid entering the housing from the tubing can escape from the same except through the valve (6) provided near its bottom. This valve controls an outlet (7) for the tubing and when the valve is Application filed August 8, 1921. Serial 31%.; 490,760.

leading into the tubing*(1).

Specification of Letters Patent. katentedJuly 25, 1922.

open the oil can drain through theoutlet into the space around the tubing;

It appears from the drawing that the housing (3) is separatedinto two'chambers (8) and (9) by atransverse wall (11). The lower oneof the chambers, 8,is rovided with two vertical slots (12) and (14),.

arranged vertically above each other and chamber ('9) has two similar vertical slots (10) and (15) leading into the opposite direction,th at is, out of'the housing into the space between the latter and the pump caslng.

The valve (6) is operated 'bymeans of a vertical rod (16) guided in the bearings The upper' (11)-and (17), a stufling-box (18) securing a tight connection around'the rod (16) be tween the two chambers. Lifting the rod removes the valveffrom its seat and opens the outlet, while lowering the rod'reseats the valve and closes the outlet. Several ways are provided for opening this valve, which will be described successively.

The first valve controlling'means is a perforated disc (21) secured on the sucker rod (22) and working in conjunction with two pawls and (24). One endofeach pawl is pivotally supported on a pin (26) secured to the rod (16) in some convenient pea-Inner, as for instanceby the set screw 2 (23), extends upwardly into the upper recess (1 1), While the other pawl extends downwardly into the lowerrecess (12),, both pawls being pressed into their respective recesses by the spring (28), a central loop of which fits on the pin (26) and the two arms of which engage the two pawls. The shape and size of the pawls is such that the nose of at least one of them extends always into the tube (1) under the influence of its spring.

This control works as follows: In the drawing the, valve is shown as being open. Thedisc is in a position where'it has just From this pivot one of the pawls,

opened the valve by carrying upward the I lower pawl (23) and with it the rod (16). Pawl (24;) has been forced into the tube (1) by its spring and theupward motion of its pivot (26). A further upward pull on the sucker rod (22) brings the disc (21) in contact with the upper pawl,but striking an inclined plane it only forces the pawl out of the tube against the tension of the spring without afiecting the rod (16). As soon as it passes the pawl, the latter is forced back into the tube by its spring until its inclined portion comes in contact with the lower edge (31) of the recess (14), which acts as a stop.

If now the disc (21) is lowered again, the pawl (24) presents to it a flat surface and is forced downwardly with the disc, thereby forcing down the pin (26) and closing the valve. But in moving downwardly the inclined lower surface of the pawl rides on the edge (81) of the recess and is forced out of the tube by the downward stroke. Simultaneously the upper inclined surface of the lower pawl is kept in contact with the upper edge (32) of the lower recess by its spring and, being actuated downwardly by the pin (26), isforced into the tube (1);. Thus we now find the valve closed, the upper pawl outside of-the tube and the lower pawl ext-ending into the tube. On continuing its downward motion'the disc (21) comes in contact with the inclined upper surface of the pawl (23) and forces the same to momentarily 'withdraw from the tube until the disc has passed, but the passing of the disc does not change the situation otherwise. The disc is now in. its lowerinost operative position. If it is raised again, by raising the sucker rod (22), it bears against the lower flat surface of the lower pawl, carries the same upward until the same leaves the tube under the influence of its inclined upper surface sliding against the upper edge of the lower recess and thereby opens the valve. This is the position from where we started, having thus shown that the valve is under complete control at any time by means of the disc and the two pawls.

To absorb the shock of the rod (16) when coming down, a spring 83) is provided be tween the valve (6) and a pin (84) penetratin g the rod; the valve (6) makes a sliding fit with the rod as indicated in the drawing and the slot (36) engaging the pin insures sufficient play between valve and rod to grant operativeness to the spring. Another spring (88) serves to hold the valve in its open position so that the valve can be closed only by the positive action of the controlling pawl.

A second valve control is provided in the pawls-(4l) and (42) secured to the rod (16) above the pawls (23) and (24) in the upper chamber of the housing, and extending through the two recesses (10) and (15) The operation of these two pawls is exactly the same as that, of thelower ones and they are actuated by a sleeve (43) which its casing.

loosely over the tubing and the housing and may be lowered and raised so as to slide along the pawls (41) and (42) by means of vertical rods (44) extending upwardly from the same and ending into a semi-circular yoke (45) joining the two rods at right angles. The yoke carries a ring (46) to which the sand line held by the operator may be attached. It will be seen that when this device is used the sleeve must first be lowered below pawl (41) and in being raised again it will strike the pawl and thereby open the valve.

A third control is the stationary sleeve (47) which works on the same principle with reference to the pawls (41) and (42), with the only difference that the tube moves and the sleeve is stationary. The sleeve is held in its place by two or more springs (48) interposed between the sleeve and the well This stationary sleeve can be connected with the tubing, if it is desired to change its location or to withdraw it, by means of a stud (49') engaging avertical slot (51) running into a lateral passage (52). It will be easily understood that by turning the tube the stud can be made to register with the slot (51) let down into the same and then looked in the lateral passage by a slight turn.

WVhile the bleeder is thus particularly described with reference to deep well oil pumps, it should be understood that the scope of the present invention is not thereby limited and that the device can be advantageously used in rotary drills and similar appliances.

We claim:

1. Valve actuating means, comprising a stationary element, a valve stem and sliding means mounted in opposite sides of the stationary element and means associated with the valve-stem adapted to be engaged by thesliding means for actuating the valve andto be disengaged from the sliding means by the stationary element.

2. Valve actuating means, comprising a stationary element, a pawl operatively associated with the valve so as to actuate the same presenting an inclined. surface held in yielding contact with the stationary element, the nose of the pawl extending beyond the stationary element, and v sliding means engaging the nose for advancing the same while the latter is freed from the engage ment by its inclined surface engaging the stationary element. V

3. In means for draining a tubing of the character described, a lateral housing secured to the tubing having a drain hole therein, a valve for said hole having a vertical stem thereon, a slot in the housing, a pawl having one end pivotally secured to the valve stem, means for pi votally forcing its-other end into the slot and sliding means slots in the housing, tvvo pavvls having one v end pivotally secured to the valve stem, means for yiledingly forcing their other 10 ends into theslots and reciprocating means adapted to selectively engage one of the pavvls to open the valve andth'e other pawl to close it. 7

GEORGE C. IRONS. ALBERT LARSON.

Images