US1895181A

US1895181A - Pumping unit

Info

Publication number: US1895181A
Application number: US502407A
Authority: US
Inventors: Walter C Trout
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-12-15
Filing date: 1930-12-15
Publication date: 1933-01-24
Anticipated expiration: 1950-01-24

Description

Jan. 24, 1933. w. c. TROUT 1,895,181

PUMPING UNIT Filed Dec. 15. 1930 2 Sheets-Sheet 1 N 9 to i Q l m \l a Y I n o 8' I 8 2 coco N E5 Q R52 is 5 a l 2i I Jvwmtoc If] WALTER G. TROUT.

5 map.

- 24', 1933. w, c, TROUT 1,895,181

PUMPING UNIT Filed Dec. 15, 1930 2 Sheets-Sheet 2 WALTER 'G. TROUT m W I 60M Map.

UNITED STATES PATENT OFFICE WALTER O. TROUT, OI LUI'KIDT, rms

PUMPING Um Application fled December 15, 1980. Serial Io. 508,407.

The invention relates to an improvement in pumping units of the type generally used in connect1on with recovering oil or water from wells.

5 Various types of pumping units have been placed in commercial use heretofore and have embodied a power unit and crank assembly. This unit would be mounted on a permanent foundation such as concrete and used in connection with the Samson post and walking beam which were mounted on the derrick foundation. Such devices, however, have been found in many instances to be unsuitable as the Samson post and the walking beam are mounted on one foundation and the pumping unit on a separate foundation and unless the expense and forethought were resorted to in order to provide a suitable foundation for both portions of the pumping apparatus at the time the derrick was built,

considerable additional expense and inconvenience were generally encountered. Great difiiculty was also encountered in properly aligning the foundations where they were embodied separately and various other difliculties directly traceable to this setup of conditions were encountered.

The present unit has been devised with the idea in mind of providing a mechanism as a o unitary structure mounted on a frame work or skids so that it might be readily transported from place to place and disposed on the derrick foundation or drilling platform and still have the assurance that all of the parts would be in proper alignment and 1n position to accomplish their function.

It is one of the objects of the invention to provide a simple and economical pumping unit which embodies a source of power, crank, pitman, walking beam, Samson post and supporting structure, all assembled and capable of transportation as a unit.

Another one of the objects is to devise a composite portable pumping or drilling unit Hhich may be disposed on the well derrick oor.

Another object of the invention is to provide a pumping unit including a driving mechanism, crank, pitman, walking beam and Samson post so arranged with respect to each other that the ma be mounted u on skids and located 0% th derrick floor 0% a well drilling rig.

Another object of the invention is to provide a pumping unit havin a counterbalance mechanism disposed on eac end of the crank shaft.

It is also an object of the invention to rovide a pltman for pumping unit whic is adapted for connection to crank arms disposed in opposite ends of the crank shaft.

St ll another object of the invention is to provide a pitman having a yoke formation so that it may be connected to two wrist-pins.

It is also an object of the invention to prov1de a walking beam having a saddle extend- 1ng beyond and connected to the underside of the beam.

A still further object of the invention is to provide a counter balance mechanism for 0 both ends of the crank shaft in connection with an oil well pumping unit.

It is also intended to provide a novel bearmg structure for connecting a yoke shaft pitman to the walking beam.

Other and further objects of the invention will be readily apparent to those skilled in the art to which the invention appertains when the following description is considered with the accompanying drawings wherein:

Fig. 1 is a side elevation of a complete assembly of the improved pumping unit.

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 3 and showing the internal construction of the pitman connection with 35 the walking beam.

Fig. 3 is an end elevation of the pumping unit looking from the left hand side of Fig. 1 with the Samson post omitted.

Fig. 4 is an end elevation of the structure looking from the right hand side of Fig. 1. The present pumping unit is particularly adapted for congested drilling conditions where the derrick or other structures do not permit of distribution of the parts over a considerable area and also adapts itself forconditions where the derrick is disposed over bodies of water or marshy land. Where the derrick must be erected upon piling, and a pumping unit of the type now in general use is to be employed, it is necessary to erect an additional foundation forthe pumping unit but with the unit disclosed in this agiphcation it is intended that no additional oundation need be erected as the unit may be disposed upon the derrick floor and is so balanced due to the provision of the double counter wei ht structure that vibration 'is practically e iminated.

' tional cross bracing? may be provided on the upper flanges of t e members so that they will form a frame work to sup ort the Samson post 7, the power un t 8, t e gear unit 9 and counterbalances 10. The Samson post 7 is shown as connected to the supporting structure by means of plates 12 which may be bolted or otherwise fastened to the support.

The Sampson post includes a triangular frame member having the

braces

13 and 14 on one side andthe central brace member 15 on the opposite side. These braces converge believe and are received by the saddle 16 which supports the center iron 17. On the center iron 17 is mounted the walking beam 18 which is adapted for reciprocation by means of the pitman 19. The end of the walking beam opposite from the pitman recelves a temper screw or bridle 20 which is adapted for connection to a cable for the standard method of drilling or to a string of sucker rods for pump- F'he gear unit 9 may be of any desired construction and embodies speed reducing gears or the herring bone gears which are now in general use. Thesegears reduce the s the operating motor 8 which'drives t e belt 21 connected to the drive wheel 22'. This drive wheel is mounted on a shaft 23 which drives the gears inside of the unit. The last gear of th1s train is connected to the crank shaft 24 which carries the cranks 25. As seen in Figures 3 and 4, there are two cranks 25, one mounted on each end of the crank shaft which rejects from the gear unit 9. It is d that this is a novel construction in a pumping unit of the resent type and is of particular advantage m a small unit because it eliminates whipping of the crank sha and'vibration of the entire unit.

The particular structure of the cranks 25 I is not important to the practicing of the present invention but they may be of the type dofconfined in the slots 28 so that the wei ht may be moved longitudinally of the era 25 to dust its eounterbalanc' or balancing efiect upon the weight of the and fluid column in the well.

The cranks 25 are provided with a plurality of openings 28 each of which is ada ted to receive the crank or wrist pin 29, to w ich the itman 19 is to be connected. The ar-' ticu ar opening 28 in which the pin 29 is to be disposed is governed by the length of the stroke which is to be made in the pum ing or drilling operation. The pitman 19 is connected to the crank pin 29 by means of a releasable vbearin 30.

The pitman 19 is of a special construction in order t at it may straddle the gear unit and cranks and be connected on opposite sides and in this manner balance the entire unit. As seen in Fi res 3 and 4, the pitman includes an invert U-shaped rod ortion provided with a cross brace 36 an having one of the bearingvor rod clamps 30 connected at each end. ith this arrangement it will be readily apparent that the entire unit may be symmetrically disposed with respect to the walking beam 18 which will thus oscillate in the plane along-the center line of the pumping unit. This is of material advantage as the unit may be located directly beneath the walking beam instead of to one side as is now the general practice. With the stresses occurring symmetrically with respect to the pumping unit, the load may be readily balanced and enormous economies efiected in reduction of the unit due to the fact that t e various partsthereof may be constructed of much lesser weight and strength as the are not subjected to vibration and strains w ich have heretofore been encountered.

The pitman 19 is connected to the walking beam as best seen in Fi land 3 by means' of a bracket 40 which 1s suitably connected to the walking beam 18 and is here illustrated as including the flanges 41 and 42 which embrace the end of the walking beam in order to insure a rigid connection. Angle plates 43 are fastened to the web 44 of the walking beam in order to receive the flange 42. This bracket 40 has an outward and downwardly extending arm 45 which is formed with a socket 46 in order to receive the ball member 47 which is carried by the pitman rod 35. This ball'member is shown in section in Fig. 2 and includes the ball 48, stem 49 and the yoke 50. The ball 48 is received in the socket 46 of the arm 45 and is retained in position by a pair of clamping plates 51 which are con-g nected to the arm by means of the bolts 52. These clamping plates are adapted to straddle the stem 49 so that the ball 48 will be securely held in socket 46 but will be free for limited oscillation in the socket. The yoke 50 embraces the rod 35 and is welded or otherwise attached thereto so that the rod will be firmly connected to the ball member so that the forces may be transmitted from the walking beam 18 to the crank 25.

Obviously the connection between the ball 48 and the socket 46 will require considerable lubrication and for this purpose a valve has been provided on the rod or pipe 35 and may be of any standard type in order that lubricant may be injected. A small conduit 56 has been provided across the inside of the pipe 35 so that the lubricant will be discharged at the point 57 inside of the hollow stem 49. The hollow ball 48 forms a chamber 58 which may act as a reservoir for lubricant so that it may pass through theopening 49 to lubricate the surfaces between the ball 48 and the socket 46.

Figure 3 shows the yoke 50 as being elonr gated so that it will embrace a considerable portion of the rod or pipe 35 and insure a steady construction.

The temper screw or bridle 20 is shown as attached to the walking beam 18 by an apron 61 which is similar to the construction shown in my co-pending application, Serial No. 492,736, filed November 1, 1930.

It is intended in the further development of the invention that various changes and alterations may be resorted to in order to adapt the pumping unit to peculiar conditions arising in actual practice. Broadly the invention contemplates the assembly of all of the structure necessary'to perform the pumping or drilling operation upon a unitary frame work, which may be disposed on the derrick floor, and which may be moved from place to place without dismantling the arts.

Having described the invention, w at I claim is:

1. A pumping unit for use with a well rig pumping equipment, said unit including a housing, a crank shaft extending from opposite sides thereof, a counter-balanced crank arm on each end of said shaft, and a pitman straddling said pumping unit with opposite sides of its lower end attached to each of said arms, and having its upper end adapted for connection to the wellrig pumping equipment.

2. A. 'umping unit including'a housing walking beam connected to the top of said pltman, and a crank shaft connected to each of the ends of said pitman.

4. In a pumping unit a yoke-shaped pitman,- a walking beam, and a bearing connects ing said pitman and beam including a ball, a stem thereon, said stem being afiixed to said pitman yoke.

5. In a pumping unit a yoke-shaped pitman, a walkingbeam, and a hearing connecting said pitman and beam including'a ball, a stem thereon, said stem being afiixed to said pitman yoke, and means on said pitman to lubricate said bearing.

6. In combination with a double crank arm, pumping unit a walking beam, an arm connected therewith, a pitman rod straddling said arm andconnected to thecrank arms, and bearing means between said arm and rod.

7. A pumping unit balanced to eliminate vibration and including a driving unit, a crank arm on each side thereof, a walkin beam centrally disposed with respect to said unit, a single pitman connecting both crank arms to said walking beam, and a swivel bearing forming such connection whereby inequalities of adjustment may be absorbed.

In testimony whereof I hereunto afiix my signature this 10th day of December, A. D.

WALTER C. TROUT.

a crank s aft extending from opposite sides thereof, a counter-balanced crank arm on each end of said shaft, and a unitary yoke-shaped pitman having its ends connected to said crank arms.

3. An assembly of the character described 1 including an inverted U-shaped pitman, a