US2028817A - Hydraulic jack - Google Patents

Description

F. ANGUISH HYDRAULIC JACK Filed March 14, 1934 3 Sheets-Sheet 1 IN VENTOR.

FRANK ANGUI SH A TTORNEY.

F. ANGUISH Filed March 14, 1954 5 Sheets-Sheet 2 I N V EN TOR.

F NGU A TTORNEY.

F. ANGUISH HYDRAULIC JACK Jan, 28, 1935.

3 Sheets-Sheet 5 Filed March 14, 1954 INVENTOR. FRANK ANGU ISH A TTORNEY.

Patented Jan". 28, 1936 UNITED STATES 2,028,817 nrnnanmc men Frank Anguish, Wewoka, kla., assignor of onehalf to Phillips Petroleum Company, a corporation of Delaware Application March 14, 1934, Serial No. 715,567

Claims.

My invention relates to an apparatus for handling rods, tubing, casing and similar equipment in wells, and is particularly useful in the operation known as running rods. v

5 The usual way to run rods is to raise a joint or series of joints by a cable, the middle of which is coiled around the shaft of a bull wheel, leaving the free ends to hang suspended after passing through pulleys located near the top of the der- [0 rick. To each free-end of the cable is fastened a hook to engage the elevators which in turn are clamped about the ends of rods. As one joint or series of joints is lowered into the well, being suspended from one end of the cable, the next 5 joint or joints are raised to a position so that the lower end can be screwed into the upper end of the preceding joint after which an engine exerts the power to slightly raise the string of rods extending into the well in order to release 0 the elevator that rests on the casing head. An engine with proper connection to the bull wheel must be used torotate the shaft of the bull wheel for this lifting action. The turning action of the shaft is further controlled by a manually operated 5 brake band contacting one of the bull wheels. The elevator thus released from the casing head is then removed and hooked onto another joint or series of joints and receives the hook of the free. end of the cable before the string in the 0 well is lowered. This operation is repeated until the running of the rods is completed.

An object of my invention is to eliminate the use of-an engine as a source of power to raise the joint or string into position over the casing head.

i and also eliminate the necessity of slightly raising the string of rods in the well in order to free the elevator which rests on the casing head, preparatory to lowering the last screwed on joint into the well.

I Another object and advantage of my hydraulic jack enables the operator to run a string of rods,

in about one half the time ordinarily consumed in such work. By its use one joint or section of rods is lifted into place while the rod or string P of rods in the well is being lowered, thus reducing the number of interruptions in the operation of running rods or pipe.

Other. objects and advantages of my invention will be apparent from the following detailed description, taken in connection with the accompanying drawings forming a part of this specification, and in which drawings:

Figure 1 is a perspective view of the hydraulic jack in place on the casing head of a well showing its relation to the derrick and other attending equipment.

Figure 2 is a partial center sectional view of e device showing the raised position of the inner piston, when the raising foot pedal is depressed.

Figure 3 is a side view of the device showing various elements and their relation to the casing head and the elevators.

Figure 4 is a partial view of the lowering foot pedal and connection to valve stem taken at a right angle to the hydraulic jack shown in Figure 3.

In the drawings, wherein similar reference char acters designate corresponding parts throughout the several views, the device comprises two concentric annular chambers, I and 2, provided for by cylinder walls 25, 26 and 21, all being supported on a base element I, which terminates in an annular flange 8, having set screws 9 or other suitable means of attaching the apparatus firmly 1-5 to the casing head 24. Freely moving annular pistons 3 and 4 operate in the annular chambers I and 2 respectively. Secured to the lower edges of pistons 3 and 4 are packing washers 5 and 6 respectively which may be made of leather or some similar material that will form leak proof movable joints at the bottoms of pistons 3 and 4.

A passageway I0 containing a ball check valve II places annular chamber I in communication with annular chamber 2. A second passageway I 2 connects the annular chambers at another point in or on the opposite side of the device from the first passageway I0. I3 represents a stop valve in conjunction with passageway I2. In the lower portion of the annular chambers I and 2 a fluid 3 pressure medium is introduced for the transfer of pressure from one annular chamber to the other in the manner hereinafter described.

A- yoke I4 is connected by means of arms I5 fixedly attached to the outer piston 3 and yoke I 4 and by another arm I6 to a foot pedal I1, which is maintained in a raised position by a spring I8.

A second foot pedal l9, supported by a spring 20,

is connected to a crank shaped valve stem 2| of the release valve I3. by means of a rod 22. In Figure 3 the device is shown in place on the casing head 24 of the well, and Figure 4 shows a front view of the foot pedal I9 and its connection to the crank shaped valve stem 2| by the rod 22. Figure 4 15 drawn to show that a downward pressure on foot pedal I9 exerts a pull on the valve stem 2I which results in opening the stop valve I 3.

The operation of my invention is described as follows:

By pressing down on foot pedal I1, a downward pull is transmitted to the piston 3, which forces the liquid from annular chamber I through the ball check valve II, thence through passageway III into annular chamber 2 which forces piston 4 to move upwardly.- When the piston 4 has reached the maximum point of its rise, the first elevator x, which grips the rod or pipe Y, is permitted to rest on the top edge of piston'l. Piston 4 serves to support theweightoftherodstring alreadyrun whilethenextrodormiuofrodsisbeingcon- 00 nected. Pressure is then applied to foot pedal l 9, which opens valve l3, permitting the pressure fluid to pass from annular chamber 2 through passageway I2, into annular chamber i. This permitspiston 4 to lower and causes piston 3 to rise until a balanced position is reached, during which time the weight of the rod string already run is supported by the bull wheel brake. The lowering of piston 4 results in freeing the first elevator X, which is then releamd from the rod or pipe and is swung over to grip onto another section of rods or pipe. When this is completed, the rods which have just been connected as above described, are thenlowered into the well by releasing the brake on the bull wheel, while at the same time pressure is again applied to foot pedal l1, and by the operation previously described, piston 4 is again raised to the high position, where it will support the second elevator, as the rods or pipe are lowered into the well. This operation is repeated until all of the rods or pipe have been run into the well. It will be noted from Figure 2 of the drawings that in the concentric annular chamber I which receives piston 3, the packing washer 5 has a larger area than the packing washer 6 in annular chamber 2, which permits the stroke of piston 3 to raise piston 4 a much greater distance than if they were the same size. For example, if the area of packing washer 5 is twice the area of packing washer 6, a one inch downward stroke of piston 3 would cause a two inch upward movement of piston 4. This variation, although not essential, is the preferred embodiment to insure the raising of piston 41 to the point of maximum rise by the limited movement of foot pedal l1.

I believe that my invention may be fully understood from the foregoing description, and it is evident that parts may be varied in many particulars without departing from the spirit of my invention, limited of course, to the following claims.

What I claim is:

1. In a hydraulic device comprising a base element supporting two concentric piston chambers about an open space extending throughout the length of the device and which contain a pressure transmitting fluid, a first conduit connecting the said chambers, a check valve in said conduit, a second conduit connecting the said chambers, a valve in said second conduit, two annular pistons provided with packing rings mounted in said piston chambers in contact with said fluid, manually operated means connected to the outer one of said pistons for forcing the piston to apply pressure to said fluid and manually operated means for operating the valve in second conduit adapted to release said fluid and permit the return of both pistons to a balanced position.

2. In a hydraulic device comprising a base element supporting two concentric annular chambers surrounding a chamber which extends throughout the length of the device, said annular chambers containing pressure transmitting fluid, annular pistons provided with packing rings within and projecting exteriorly of said annular chambers, a by-pass passageway forming communication between said annular chambers, a check valve in said by-pass pasageway, manually operable means connected to the outer one of said annular pistons for forcing the piston to press against the pressure transmitting fluid, a second by-pass passageway forming communication be- 'fluid for raising the other piston, and means for tween said annular chambers, a valve in said second by-pass passageway, manually operable means connected to said valve to permit return of pressure fluid to the outer one of said annular chambers.

3. in an apparatus of the class described, two concentric annular chambers containing a pressure transmitting fluid and mounted on a base element, annular pistons within and projecting exteriorly or said annular chambers, packing rings attached to said pistons at the ends extending interiorly of said annular chambers, .a passageway providing communication between the outer and inner annular chambers, a check valve in said passageway, a manually operable means connected to the outer one of said annnlar pistons adapted to force said annular piston to appiy pressure against the pressure transmitting fluid, a second passageway providing communication between the outer and inner annular chambers, a stop valve in said second passageway, a manually operable means of opening and closing said stop valve which, when in open position permits return of pressure transmitting fluid from the inner annular chamber ,to the outer annular chamber, and an open space extending throughout the length of the device.

4. A hydraulic device comprising in combination, a base element supporting two concentric cylinders about an open space extending through- 1 out the length of the device, two pistons mounted in the cylinders and projecting exteriorly of said cylinders, a pressure transmitting fluid within said cylinders, a first passageway providing communication between the outer cylinder and inner cylinder, a check valve in said first passageway, a manually operated means in connection with the outer one of said pistons for forcing the outer one of said pistons to apply pressure to the pressure transmitting fluid, a second passageway providing communication between the said cyiinders, a stop valve in second passageway, a manually operated means connected to said valve which in an open position permits pressure fluid to return from the inner cylinder to outer cylinder, all elements being so arranged as to permit rods or pipe to move=freely through the open space extending throughout the length of the device.

5. In a device of the character described, two concentric piston chambers about an open space extending throughout the length of the device adapted to be arranged at the top of a well, a pair of pistons cooperating with said chambers said chambers being adapted to contain a pressure transmitting fluid fcr actuating each piston by movement of the other piston, a first conduit placing said chambers in communication, a check valve in said conduit to prevent the fluid from flowing from one chamber to the other, but allowing movement of the fluid in the opposite direction, a second conduit placing the chambers in communication, a valve for controlling the flow of fluid through the second conduit, means for actuating the piston in the said one chamber to cause the said piston to apply pressure to said operating the valve in the second conduit to release said fluid and permit the return of both pistons to a balanced position.

FRANK ANGEISH.

Images