US1689794A - Double-acting pump - Google Patents

Description

mmm: `ACTING PUMP Original Filed Aug. 1926 Patented Oct. 30, 1928.

UNITED STATES PATENT OFFICE.

ANDREW P. MORRIS, OFSNYDEB, TEXAS, ASSIGNOR OF ONE-TENTH TO C. FRANK SENTELL, OF SNYDER, TEXAS. A

novena-ACTING PUMP.

Continuation of application Serial No. 131,922, led August 24, 1926. This application filed November 8, 1927. Serial No. 231,859.

is to provide al1-improved construction which will enable the lunger rod and, all attachments thereto, to e pulled or withdrawn from the pump barrel and the well tubing without pullingor drawing the pump barrel or the tubing from the well.

. Anotherl object is to provide for a maximum v flow of liquid from the pump barrel.

Reference is made to the accompanying drawings which form a part of this application. f

Figure 1 is a vertical section of a well casing having pum ing means therein constructed in accor ance with the present 1nvention.

Figure 2 is a section on line 2-2 of Figure 1.

Figure 3 is a horizontal section taken on the line 3-3 of Figure 1, and

Figure 4 is a perspective view of the ring valve for the upper end of the pump barrel.

Similar characters of reference are used to indicate the same parts throughout the several views.

Within the well casingll 1s arranged a pump barrel 2 provided at t e up er end with a couplin sleeve and compose of two sections 3 and 4 aving threaded connection wlth each other. Discharge pipe orwell tubing 5 screws into the upper sleeve section 3, and provided within the latter is an upper check valve 6,v

which is adapted to engage seat 7 provided in said section 3. The check valve 6 has a central bore through which a hollow plunger or piston rod section 8 travels freely. Sleeve section 4 screws onto the u per end pf barrel 2 and is provided with axia IyeXteHdm ports 9 through 'which the barrel 1s charge with liquid as the piston 10 of rod section 8 underoes its down stroke, on which stroke the liquid in the barrel 2 below the piston is discharged through hollow piston rod section 8 into discharge pipe or tubing 5.

In the lower end of hollow piston 10 isa check valve 11 by which the liquid passes into rod section 8 when the down stroke is made. The piston 1() is provided with cup leathers turned up and down, as shown.

The upper end of hollow piston rod sectiony i 8 connects to the sucker rod 12 by means of a cage connection 13, allowing liquid passing through hollow piston rod section 8 to pass into discharge pipe or tubing 5 at this point.

On the up stroke of hollow piston 10, barrel 2 is charged with liquid below the piston through a check or standing valve 14 and the liquid already in the barrel, above the piston, is discharged around the upper check valve 6 into discharge pipe 5, said valve 6 traveling upwardly on hollow piston rod section 8 at the same time valve 11 and a ring-shaped check valve 15 are closed. The ring valve 15 has a seat 16 of annular concave form onu per end of the annularly and internally thick ened lower end portion of the sleeve section 4 through which the ports 9 extend.

The barrel 2 is an open'top barrel, and the diameter of all openings above check valve 6, l including the internal diameter of discharge pipe 5, are large enough to permit the piston 10 and check valve 6 to be withdrawn with the plunger and sucker rods from the well .having a removable tapered fit in the itting 17 threaded on the lower end of the barrel.

It will be noted that on the upstroke ofthe piston, the liquid is driven directly from the barrel into the tubing, thereby resulting in a maximum flow of liquid with a minimum resistance. It will also be seen that the con-. struction is extremely simple and durable so as to be readily manufactured and assembled with economy. Obviously, the lower end of sleevel section 3 limits the openin of ring valve 15 to the proper extent, and ne to the 'weight of the valves 6 and 15, they will seat by gravit lin an efficient manner and without the aid o seating springs. y

Minor changes may be made without departing from the spirit and scope of the invention as claimed i What I claim as new is In a double-acting pump for wells, a cylindrical barrel open at its upper end, well tubing of larger diameter than said barrel, a coupling sleeve embodying a lower section threaded onto the upper end of said barrel, said lower coupling sleeve section having a horizontal internal annular valve seat and being formed with axially extending intake ports in its lower end which open at their upper ends through said seat, said seat and said port directly surrounding the upper end of said barrel, a downwardly seating ring valve associated with said seat, said coupling sleeve further embodying an upper section threaded into the lower section and having a horizontal internal annular valve seat, said tubing being connected to said upper coupling sleeve section, a hollow piston rod having a valved piston on its lower end working in said barrel and provided with outlets at its upper end, a downwardly seating check valve slidably tted on the piston rod and cooperating with the last named valve seat, the last named valve seat having an internal diameter greater than the diameter of the piston, and said cheek valve having a diameter lesser than the internal diameter of the tubing, to permit free upward removal. of the piston and the check valve with the piston rod from the barrel and the tubing. v

In testimony whereof I ax my signature.

ANDREW' P. MORRIS..

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