US2445249A - Well tubing - Google Patents

Description

y c. w. SPROULL 2,445,249

WELL TUBING Filed March 11, 1946 2 Sheets- Sheet 1 'lllalillllnpllllllllllrlrm '11,!!!Illllqlitllrllrll/I/ {ff/Mm 4 y 948. c. w. SPROULL 2,445,249v

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D d I I 00 I o DWW I O 'lrlllllLy Patented July 13, 1948 Charles'W. Sproull, Houston, Tex.; Edith M.

Sproull executrix of said Charles W. Sprouli,

deceased Application March 11, 1946, Serial No. 653,595

6 Claims. (CL ass-'22) This invention relates to a well tubing and has more particular relation to a novel type of pump tubing.

An object of the invention is to provide a tubing of the character described having a by-pass conduit through which the gas in the well may escape to the ground surface independent of the tubing itself.

It is another object of the invention to provide a novel type of coupling for the tubing sections; said coupling having a by-pass therethrough.

A primary object of the present invention is to provide, in a well pump, a by-pass conduit leading from beneath the seal between the pump and the casing and having a discharge at the ground surface whereby gas collecting above the well fluid-may be relieved from the well so that it will not collect and interfere with the operation of the pump.

Other objects and advantages of the invention will be apparent from the following specification which are illustrated by the accompanying drawings, wherein- Figure 1 is a sectional view of a Joint connecting the sections of a well tubing including the novel type of coupling.

Figure 2 is a side view thereof partly in section 2 In the present illustration a fluid lift type of pump is shown and beneath the casing Hi there is a packing assembly ll forming a seal between the upper end of the pump cylinder and the casing i.

The lower end of the pump cylinder is submerged in the liquid, in the casing I, to be pumped and in oil wells gas accumulates between the taken at right angles to the view shown in Figure 1.

Figure 3 is a cross-sectional view taken on the line 33 of Figure 1.

nate the same parts in each of the figures, the

numeral l designates a well casing to the upper end of which the casing head 2 is connected which is provided with an outlet line 3. Within the casing there is shown, in the present illustration, a pump tubing 4 which is sealed'with the casing head by means of a cap 5. v

The numeral 6 designates a pump cylinder whose lower end is equipped with the upwardly opening inlet valve mechanism 1. In the cylinder 8 there is a reciprocable plunger 8 which is reciprocated by the plunger rod 9. This rod in turn is reciprocated by a, suitable pump operating mechanism which is enclosedin the casing Ill which is connected to the lower end of the pump tubing 4.

packing assembly I I and the surface of the liquid and if allowed to continue to accumulate 'it will eventually enter the pump cylinder and interfere with the operation of the pump.

As hereinabove indicated it is one of the chief objects of the invention to provide means for relieving the gas which accumulates in the well. In order to do this the gas must be by-passed from the casing beneath the packing assembly and discharged at the ground surface.

A special type of pump tubing has, accordingly, been designed which will now be described.

This pump tubing is composed of substantially similar tubular sections l2 whose adjacent ends are united by a special type of coupling l3. This coup7ing is-internally threaded at each end and also has the internal annular channels ll, it which are connected by a vertical channel IS in the coupling. This channel I5 is preferably formed by externally grooving the coupling i3 longitudinally from one channel It to the other and then welding a plate, as l6, over the groove.

There are the inside tubular upper and lower elbows i1, i8 associated with each coupling. One

end of each elbow is fitted through an opening tions l2 so that the ends of the coupling i3 can be threaded onto the adjacent ends of the sections l2.

The inner end of the elbow I1 is turned upwardly and the inner end of the elbow I8 is turned downwardly so that said elbows will receive the adjacent ends of a pipe i9.

From the foregoing it will be apparent that each section of the pump tubing with the corresponding by-pass pipe l9 and elbows IT, l8 constitute a unit to the end that the pump tubing maybe made up of these pre-assembled units. The pump tubing may therefore be conveniently made up while installing the pump in the well and broken up when it is desired to pull. the pump. It is to be noted, however, that the-lower coupling It has its lower elbow I'ia on the outside rather than on the inside with the upper end of the pipe l9a connected into said elbow Ha. This pipe l9a leads down through the packer assembly ii and terminates in the gas collecting chamber beneath.

The upper end of the by-pass pipe, which is made up of the pipe sections it, and itia, is turned laterally through the pump tubing, above the casing head and is equipped with a control valve 21).

From the foregoing it is apparent that the gas collected above the oil, and beneath the pump packing in an oil well may be released, at the will of the operator, so as not to interfere with the operation of the pump.

The drawings and description are illustrative merely while the broad principle of the invention will be defined by the appended claims.

What I claim is:

1; In a tubing having tubular sections, a one piece tubular coupling connecting said sections and, having a single channel within the wall thereof whose ends terminate within the tubing and tubular fittings in the tubing connected into the channel ends.

2. In a tubing having tubular sections, a tubular coupling connecting said sections and having a channel within the wall thereof whose ends terminate within the tubing, independent pipes in the respective sections and tubular fittings which connect the adjacent ends of said pipes into the corresponding ends of the channel.

3. In a well tubing composed of tubular sections and tubular couplings into which the adjacent ends of the sections are threaded, an independent pipe within each section and adjacent the inside wall thereof, a tubular elbow at each end of each section and anchored thereto and into which the corresponding ends oithe pipe in 4 said section are connected, each coupling having a. single, longitudinal channel within the wall thereof whose ends are in communication with the passageways through the corresponding 5 elbows.

4. In a well tubing, a tubular tubing section whose ends are externally threaded, an independent pipe in said section whose ends terminate in tubular elbows which extend outwardly through, and are anchored to, said threaded ends.

5. In a well tubing, tubular tubing sections whose ends are externally threaded, a tubular coupling threaded onto, and connecting, adjacent ends of said sections and having a, single channel in the wall thereof extending longitudinally of the coupling, an independent pipe in each tubing section, each pipe terminating in a tubular elbow which extends through and is anchored to, the

- corresponding threaded end of the section and 29 communicates with said channel, whereby a continuous conduit is formed through said pipes and channel.

6. The combination with a well casing and a tubing therein leading to the ground surface of annular packing between the tubing and casing and an independent conduit whose lower end is extended through said seal and whose upper end extends to the ground surface, said conduit including by-pass channels through the tubing con- 30 plings.

CHARLES W. SPROULL.

REFERENCES CIITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,178,999 Fleming Apr. 11, 1916 1,736,923 Lalonde Nov. 26, 1929

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