US2271086A

US2271086A - Pumping jack

Info

Publication number: US2271086A
Application number: US286900A
Authority: US
Inventors: August R Maier
Original assignee: Oil Well Supply Co
Current assignee: Oil Well Supply Co
Priority date: 1939-07-27
Filing date: 1939-07-27
Publication date: 1942-01-27
Anticipated expiration: 1959-01-27

Description

1942- A. R. MAIER 2,271,086

PUMPING JACK Filed July 27, 1939 INVENTOR:

flaw/5T E. MAI/EB,

Hi5 ORNEY.

Patented Jan. 27, 1942 7 PUMPING JACK August R. Maier, Dallas, Tern, assignor to Oil Well Supply Company, a corporation of New Jersey Application July 27, 1939, Serial No. 286,900 I 8 Claims.

This invention relates to improvements in pumping jacks such as used in connection with oil Well pumping apparatus.

One object of the invention is to provide a pumping jack of simple and rugged construction. Another object is to provide a rigid supporting base with a unitary walking beam and -V-a'ssembly adjustably secured thereto. Another object is to provid novel means of adjustably securing a walking beam, V-assembly and trunnion to an integral supporting base. A further object is to provide a unitary walking beam assembly which can be inexpensively and conveniently mounted on a solid base and readily supportable without likelihood of misalignmentor loss of parts. A

further object is to provide a rugged pumping jack assembly devoid of bolted joints constructed and arranged to prevent weaving.

The foregoing and further featuresof the invention will be fully apparent from the following detail disclosure, when read in connection with the accompanying drawing, in which:

Figure 1 is a side elevation of an oil well pumping jack embodying the invention;

Figure 2 is a section on line IIII of Figure 1;

Figure 3 is a plan of the base member; and

Figure 4 is a side view of the walking beam assembly.

In the pumping jack of the present invention, the unitary walking beam l and V-assembly include an arm l2 perpendicular to the beam It and a strut l4 disposed obliquely thereto, the parts being integrated by welded joints, as indicated at l6, l8 and 20. Similarly, the mulehead or link hanger 22 can be welded to the outer end of the walking beam, and the trunnion 24 is Welded to an intermediate part thereof, Thus it is clear that all of the component elements of the walking beam and V-assembly are integrated one with the other, these parts being shop fabricated and being well adapted for nesting during shipment.

The pumping jack base, indicated generally at 26, comprises

oblique legs

28, 30, 32 and 34 which at their lower ends are welded at the corner intersections of a rectangular frame,

sides of the slot 48, there are

bearings

50 and 52 which are attached'by bolts 54 passing through slots 56 so as to permit of a sliding adjustment which is accomplished by suitably adjusting the composed of

parallel side members

36 and 38 therethrough. On the top plate 44, at opposite screws 58 threaded through lugs 59, as shown.

The perpendicular arm I2 of the V-assembly is drilled at a plurality of points for the reception of suitable bolts by means of which a bearing 60 can be secured in various positions of radial adjustment for the reception ofa pin 62 for connecting a pull rod 64 with the arm.

'In the construction described, the main units of the jack are only two in number; namely the base or Samson post and the walkingbeam with its integrated V-assembly; This facilitates erection in the field and avoids erecting troubles usually associated with oil field apparatus due to loss or misplacement of parts. The only bolts used in the assemblage are those for the attachment of the bearings'50, 52 and 60, and theadjusting bolts 58. These are all wiredin place during shipment. The integrated construction ofthe parts is made practical bythe provision of the base with the slotted or U-shaped top plate which permits easy assemblage of the parts and provides ample room for'the rocking motion of the Walking beam arm. 7 The" main component parts'arethus so constructed and arranged that they can be nested in a small bulk unit for shipment and easily and quickly erected upon arrival at their destination.

Heretofore the base for an oil well pumping jack has usually been split longitudinally and the walking beam arm and strut corresponding to the V-assembly herein described were separate parts. In the conventional prior art units the trunnion is also a separate part. According to the present invention the trunnion forms an integral part of the walking beam and V-assembly. Thus the invention provides a simplified assemblage whose main elements are devoid of bolted joints and can be more easily and quickly erected on location with less likelihood of error and misplacement orloss of parts than is the case in prior constructions.

While I have described quite precisely the particular embodiment of the invention illustrated, it is to be understood that variations thereof may be made by those skilled in the art without departure from the invention as defined in the appended claims.

I claim:

1. A pumping jack of the character described comprising a unitary base having a U-shaped top plate secured thereto, a walking beam having integrated therewith a V-assembly consisting of an arm perpendicular therewith and a strut inclined thereto, bearings supported on the plate, and a trunnion formed as an integral part of the walking beam mounted in said bearing.

2. A pumping jack comprising a base supporting a U-shaped slotted plate, a walking beam having an arm perpendicular thereto extending through the slot of the plate, a strut uniting respectively the outer portions of the walking beam and arm, the walking beam, arm and strut all being secured to one another by welded joints, bearings mounted on said top plate, and a trunnion pin welded to the walking beam and mounted by said bearings.

3. A pumping jack comprising a base including a top plate with an open ended slot formed therein, a walking beam having an integral trunnion pivotally mounted by bearings secured to said plate, said walking beam having an integral arm perpendicular thereto arranged to rock freely through the slot in the plate, and a strut integrally connected with the outer portions, re spectively, of the walking beam and said arm.

4. A pumping jack-of the character described comprising a rectangular frame, a top plate with an open ended slot therein, legs joining said frame to the top plate, bearings adjustably secured to the top plate, a walking'beam having a trunnion pin and mounted by said bearings, an arm extending through the slot in the top plate and integrally secured to the walking beam,

and a diagonal strut integrally united to the outer portions of the walking beam and arm.

5. A pumping jack including a unitary walking beam having a beam and a depending arm forming a reentrant angle therebetween in the plane of movement of the walking beam, a transverse trunnion secured to the walking beam in said angle, a unitary base having a top plate extending transversely of the said plane of the walking beam and having a slot in one end thereof for receiving the beam arm, and trunnion bearings removably secured to the plate on opposite sides of the slot for assembling the jack, said slot extending inwardly of said plate a sufficient distance to permit of free rocking movement of the beam arm upon the trunnion.

6. A pumping jack including a unitary walking beam having a beam and 2. depending arm forming a reentrant angle therebetween in the plane of movement of the walking beam, a transverse trunnion secured to the walking beam in the apex of said angle, a unitary base having a top plate extending transversely of the said plane of the walking beam and having a slot in one end thereof for receiving the beam arm, and trunnion bearings removably secured to the plate on opposite sides of the slot for assembling the jack, said slot extending inwardly of said plate a suificient distance to permit of free rocking movement of the beam arm upon the trunnion.

7. A pumping jack including a unitary walking beam having a beam, an intermediately depending arm and a strut inclined between and connecting one end of the beam and the arm, a trunnion secured to the walking beam on the opposite side thereof from said strut in the angle formed by said arm and the other end of the beam, said trunnion being transverse to the plane of movement of the walking beam, a unitary base having a top plate extending transversely of the said plane of the walking beam and having an open-ended slot in one end thereof for receiving the beam arm, and trunnion bearings removably secured to the plate on opposite sides of the slot for assembling the jack, said slot extending inwardly of said plate a sufficient distance to permit of free rocking movement of the beam arm upon the trunnion.

8. A pumping jack including a unitary walking beam having a beam and a depending arm forming a reentrant angle therebetween in the plane of movement of the walking beam, transversely disposed means secured to the walking beam in said angle for pivotally mounting said walking beam, a base having a top plate extending transversely of the said plane of the walking beam and having a slot in one end thereof for receiving the beam arm, and means supporting the walking beam by the pivotal mounting thereof, said supporting means being removably secured to the plate on opposite sides of the slot for assembling the jack.

AUGUST R. MAIER.