US1811381A - Oil well pumping and flowing apparatus - Google Patents

Description

June 23, 1931.

R. E. BERWICK OIL WELL PUMPING AND FLOWING APPARATUS Filed Sept. 11. 1930 I gwoe'ntoz Rjifier Wial enema June as, rear teaser ROBERT E BERWIQK, F NEWKIRK, come.

on. WELL PUMPING- AND FLUWTNG: APPARATUg Application filed September 11, 1930. Serial No. 481,242.

It? to reduce to the minimum the overhead expense incident to'the elevation of oil from wells hich expense consists mainly of the pulling of tubing and rods from the well.

To attain the foregoing and other obj ects, the nature of which will appear as the description proceeds, the invention comprehends the provision of a valve which shall be adapted to permitpressure fluid in the casing to flow into the tubing when the pressure in the latter falls below that in the former and which shall be adapted to prevent-the fluid in the tubing from flowing into the casing and when the pressure of the former falls below that in the latter.

combination and arrangement of parts hereinafter fully described and claimed, and illustrated in the accompanying drawings, wherein Figure 1 is a vertical sectional view illustrating the application of the valve to the tubing of an oil well flowing or pumping apparatus; v

Figure 2 is a sectional view taken on the horizontal plane indicated by the line 2-2 of Figure 1, and I v Figure 3 is a view in side elevation of one of the stems of the valve.

Referring in detail to the drawings, 1 designates a fragmentary portion of the tubing of an oil well flowing or pumping apparatus,

and 2 designates the valve.

The valve 2 comprises a one piece body 3 which is of hollow cylindrical formation and is internally screw threaded to receive the adj acent ends ofadj acent sections 4 of the tubing v1. The body 2 is provided in its, inner side and centrally between its ends with an annular groove 5, the depth of which is less than the thickness of the wall of the body, and

The invention consists in the construction,

groove 5 to and through the lower end of the g body. The passages 6 communicate near their upper ends with the bottom of the groove 5 by way of radial ports 7 which are. smaller diametrically than the greatest width of the groove. Cylindrical stems 8 are arranged vertically in the passages 6 and'extend from the lower ends of the passages to a point short of the port 7. The stems 8 are carried by plugs 9 which are located at the lower ends of the stems and are screw threadedly engaged, as at 10, with the lateral walls of the passages 6. The plugs 9 are provided in their lower sides with notches 11 to permit the stems 8 to be applied to or removed from the passages 6by a screw driver. The stems 8 and their attaching plugs 9' are provided with passages 12 which extend longitudinally therethrough and have their upper ends enlarged to provide seats 13 for, ball valves 14:. Those portions of the passages 6 located above the stems 8 constitute chambers for the valves 14:, and these chambers are of sufficient height to permit the waives to'be moved up 05 their seats 13.

The stems 8 are located laterallybeyond the tubing 1, and in view thereof, the lower ends of their passages 12 are in communication with the casing of the well. When the pressure in the tubing 1 is greater than that in the casing ofthe well, the valves 14. are seated and prevent the fluid in the tubing from flowing into the casin When the pressure in the casing becomesgreater than the pressure in the tubing, the gas or air in the casing flows upwardly through the stems 8 past the valves 14: and into the groove 5 and enters the column of liquid in the tubing 1 with the result that the lifting impulse is imparted to the column of liquid. As the groove 5 is annular, the air or gas flowing thereinto from the casing'will be evenly distributed into the'column of fluid in the tubing. The valve may be provided with any number of ports 7 and the means for controlling the flow of gas or air in the casing thereinto.

From the foregoingdescription, taken in connection with the accompanying drawings, 5 it will be apparent that I have provided a flow Valve for the tubing of an oil Well flowing 01' oil well pumping apparatus which is adapted, when the pressure in the casing is greater than that in the tube, to permit gas or air in the casing to flow into the tubing and thus impart a lifting impulse to the column of liquid in the tubing.

While I have described the principle of the invention, together with the structure which I now consider the preierred embodiment thereof, it is to be understood that the structure shown is merely illustrative and that such changes may be made, when desired, as fall within the scope of the invention as claimed.-

I claim o A flow valve for the tubing ofan oil well flowing and pumping apparatus, comprising a one-piece hollow body adapted to be interposed in the tubing and provided in the inner side of its wall between the ends thereof with an inner annular groove of less' depth than the thickness of the Wall and increasing in width in the direction of the longitudinal axis of the body, the body being provided in its Wall radially beyond the bottom of said groove with a passage extending from the lower end of the wall to, a point above the bottom of the groove, the wall of the body being provided with a radial port smaller-diametrically than the greatest width of the groove and establishing communication between the upper end of the passage and the bottom of the groove, and a downwardly seat- 40 ing valve in the passage. i

In testimony whereof I hereunto afiix my signature. 1

' ROBERT E. BERWICK.

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