US1757329A - Oil-well flow device - Google Patents

Description

May 6, 1930- K. P. NEILSEN 1,757,329

OIL -WELL FLOW DEVICE Filed Feb. 9, 1927 www?? H TRNEX BY. Y v /f/Wm/ -Patented May 6, 1939 UNiE fST TENT OFM KARL E. NEILSEN, OF LONGr BEACH, GJFOBNIA OILrWELL FLOW DEVICE In flow devices heretofore in'use the gas under pressure was forced down into the casing and consequently exerted a pressure against the oil formation at the bottom of the well which was extremely detrimental, in that the oil was forced away from the well and caused it to stop iowing..

An object of my invention 1s to provide a flow device in which there is no pressure exerted on the oil formation.

Another object is to provide a flow device in which liquid is drawn into a. chamber by the action of a piston and is again forced out of the chamber by the opposite movement of the piston, said piston being actuated by the gas pressure.

Still another object is to provide a flow device comprising a displacement pump and a gas injection means.

Other objects, advantages, and features of invention may appear from theaccompanying drawing, the subjoined detailed description, and the appended claims.

In the drawing:

Fig. 1 is a longitudinal section view of my flow device in pcsition in a well.

Fig. 2 is an enlarged sectional view `taken on line 2, 2, Fig. 1.

Referring more particularly to the drawme: l

2'zlhe usual well casing 1 is provided and a packer 2 is set in said casing above the usual perforations in said casing thus providing a gas pressure chamber 3 in the casing which chamber is not open to the liquid bearing sands. A standing valve 4 of well-known construction is positioned in the packer 2, or above said packer, as will be found suitable in any specific installation. Flow pipe 5 rises from the packer 2 to the top of the well and the packer is preferably secured to the lower end of said pipe. A liner 6 is provided in the pipe 5 and is immovably secured therein, said liner` being substantially the same length as the stroke of the flow device, as will be further described.

A tube 7 extends through the liner 6 and is slidable therein, said tube being provided with a piston 8 at its upper end, and a piston 50 9 at its lower end, and the tube extends through said pistons and is open to the space above and below the pistons. A check valve 10 is provided in the lower end of the tube 7 and a second check valve 11 is provided in the upper end of t-he tubing.

- Ports 12 are provided in the pipe 5 adjacent the lower end of the liner 6 and ports 13 are provided in the pipe adjacent the upper end of the liner. The purpose of these ports is to admit gas under pressure from the chamber 3 causing said gas to exert a pressure against the pistons 8, 9 and cause them to reciprocate. A sleeve 14 is fitted within the pipe 5 and is adapted and arranged to control the ports 12, and a second sleeve 15 is positioned within the pipe 5 to control the ports 13'. i The sleeves 14, 15 are connected by rods 16 which extend through the liner 6 and are slidable therein. l

1 The operation of my How device is as folows:

Gas under pressure is forced into the cham bei' 3 and in the position shown in Fig. 1 enters the ports 13 exerting an upward pressure against the bottom of the iston 8, causing the pistons 8, 9 and tube to move upwardly and draw in a charge of liquid past the standing valve 4. The upward movement of the pistons continues until the piston 9 engages the sleeve 14 moving said sleeve 80 upwardly and also moving the sleeve 15 upwardly because of the connecting rods 16. This upward movement of the sleeve opens the` ports 12 and closes the ports 13. At the S- extreme upward'position of the piston 9 the ports 17 in the tube 7 are above the liner 6. This permits the pressure below the piston 8 to be relieved through the tube and causes the gas to pass upwardly into the column in the pipe 5, thereby materially lightening the liquid in said column.

The ports 12 being now open and the ports 13 being closed, pressure 'is exerted on the top of the piston 9 causing said piston to move downwardly along with the piston 8 and tube 7 until the piston 8 engages the sleeve 15 to move said sleeve 15 and sleeve 14 downwardly into the piston shown in Fig. 1. The ports 17 extend below the liner 6 to relieve the pressure in the chamber above the piston 9 thus causing the cycle.

The check valve 10 and 11 prevent any gas pressure from being exerted on the standing valve 4 and also retain the liquid column in the tube 5 preventing it from passing downwardly during the up stroke of the pistons.

Having described my invention, I claim:

1. A well flow device including a casing, packer means in said casing, a ilow pipe in the casing, piston means reciprocally mounted in said flow pipe, said pipe having ports provided therein throu h which Huid under pressure is adapted to ow, and means operable by said reciprocally mounted means adapted to control said ports, and said reciprocally mounted piston means having ports therein through which the fluid under pressure is relieved into the liow pipe.

2. In a well including a casing, a flow de- Vice comprising a packer in said'casing, a standing valve, a flow pipe rising from the packer, a pair of pistons reciprocally mounted in said pipe, tubing connecting said pistons, said pipe having ports therein through which uid under pressure is adapted to flow to reciprocate said pistons, and means operable by said pistons adapted to control said ports, and said tubing having relief ports therein for the pressure fluid.

3. In a well including a casing, a flow device comprising a packer in said casing, a

standing valve, a How pipe rising from the' packer, a pair of pistons reciprocally mounted in said pipe tubing connecting said pistons, said pipe having ports therein through which fluid under pressure is adapted to flow toreciprocate said pistons, and means operable by said pistons adapted to control said engaged by the pistons to control said ports, valve means in the tube, said tube havin ports therein adapted to extend above an below the liner to relieve the pressure above and below said liner.

6. In a well including a casing, a flow device comprising a packer, pipe rising from the packer, a pair of pistons reciprocally mounted in the pipe, a tube connectin said pistons, a liner through which said tu e extends, said pipe having luid inlet ports therein above and below said liner` adapted to admit fluid under pressure whereby the pistons are reciprocated, sleeves above and below the liner, rods connecting said sleeves, said sleeves being adapted to'be engaged by the pistons to control said ports, a standing valve in said packer, and pressure relief means in said tube whereby the fluid under pressure is relieved. i

7. In a wellincluding a casing,l a flow device comprising a packer, pipe rising from the packer, a pair of pistons reciprocally mounted. in the pipe, a tube connecting said pistons, a liner through which said tube extends, said pipe having ports above and below said liner through which fluid under pressure is adapted to pass to reciprocate the pistons, sleeves above and below the liner adapted to control the ports, rods extending through the liner and secured to said sleeves, said tubephaving ports therein adapted to extend above or below the liner to relieve the pressure-above or below said liner, a check valve in said tube, and a standing valve in said liner.

In testimony whereof, I aiiix my signature.

YKARL P. NEILSEN.

ports, and a check valve in said tubing, and v said tubing having relief ports therein for the pressure fluid.

4. In a well including a casing, a flow device comprising a packer, pipe rising from u the packer, la pair of vpistons reciprocally mounted in the pipe, a ,tube connecting said pistons, a liner through which said tube eX- tends, said pipe having lluid inlet ports therein above and below said lin'er adapted to admit fluid under pressure whereby the pistons are reciprocated, sleeves above and below the liner, said sleeves being adapted to be engaged bythe pistons to control said ports, and pressure relief means in said tube whereby the fluid under pressure is relieved.

5. In a well including a casing, a flow device comprising a packer, pipe rising from the packer, a pair of pistons reciprocallyv mounted in the pipe, a tube connecting said pistons, a liner through which said tube extends, said pipe having fluid inlet ports there- 1n above and belowsaid liner adapted to' admit Huid under pressure whereby-the pistons are reciprocated, sleeves above and below the liner, said sleeves being adapted to be

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