US2157628A

US2157628A - Pumping rig

Info

Publication number: US2157628A
Application number: US120049A
Authority: US
Inventors: Albert N Porter
Original assignee: J F DARBY
Current assignee: J F DARBY
Priority date: 1937-01-11
Filing date: 1937-01-11
Publication date: 1939-05-09
Anticipated expiration: 1956-05-09

Description

May 9, 193g. A, N PORTER 2,157,628

PUMPING RIG i @Ej INVENTOR ATTORNEY May 9, 1939- I A. N. PORTER 2,157,628

PUMPING RIG Filed Jan. ll, 1957 2 Sheets-Sheet 2 ATTORN EY Patented May 9, 1939 UNETED STATES PATENT OFFIQE PUMIPING RIG Application January 11, 1937, Serial No. 120,049

2 Claims.

This invention relates to pumping rigs, particularly those used in pumping voil wells, and has for its principal object to provide an apparatus ,of this character which is constructed to withstand the heavy duty required in .operating extremely deep wells.

Other important objects of the invention are to provide for straight lift of the rods with a minimum of moving parts necessary t0 compensate for arcuate movement of the pump beam; and to provide for maximum rigidity and bracing of the fixed parts of the rig.

In accomplishing Athese and other objects of the invention, as hereinafter pointed out, I have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawings, wherein:

Fig. l is a perspective View of a pumping rig constructed in accordance with the present invention.

Fig. 2 is a horizontal section through the rig on the line 2 2 of Fig. 1.

Fig. 3 is a side elevational View of the pumping rig.

Fig. 4 is a vertical cross-section through the rig on the line 4 4 of Fig. 3.

Fig. 5 is a similar section on the line 5 5 of Fig. 3.

Referring more in detail to the drawings:

I designates a pumping rig constructed in accordance with the present invention and which includes a base frame 2, an upright guide support 3, and a Samson post structure 4. The base frame 2 includes spaced parallel sills `5 and 5 having I-beam section and arranged with the lower flanges 1 forming skids 8 upon which the rig is supported. The upper flanges 9 provide attaching support for the guide frame 3, Samsonpost 4 and a transmission Ill. The sills are spaced apart by cross members II, I2, I3 and I4 and which have their ends welded or otherwise attached to the webs of the sills. The lower flanges of the sills are cut back of the ends of the upper flanges, as at I5, and welded thereto are angle shaped nose plates I5 terminating in vertical plate portions II that are welded to the upper anges of the sills.

Mounted on the cross beams I3 and I4 at the rear end of the base frame is the Samson post 50 structure 4 which includes spaced pairs of uprights iB IQ and 20 2I of channel shaped section. The lower ends of the uprights are inset relatively to the sills but are secured thereto by gusset members 22 and have offset portions 23 whereby the upper ends thereof are located sub- (Cl. 'Z4-103) stantially over .the sills of the base frame. The inner pair of uprights is slightly longer than the outer pair to connect with

inclined braces

24 and 25 respectively connecting the uprights with sides of the guide support 3. The lower portions of the uprights are connected by channels 26 and 2l', and the rear uprights are connected by a cross member 23 at a point above the offsets.

The guide support 3 includes spaced

uprights

29 and 30 having their lower ends supported on the forward ends of the sills and secured thereto by suitable'gusset plates 3l. The top ends of the uprights are welded to the

braces

24 and 25 and are connected by cross channels 32 as best shown in Fig. 1. The uprights are also spaced apart at a point above the transmission by a cross member 33 which cooperates with an I-section 34 to attach the ends of

horizontal braces

35 and 35 that have their opposite ends connected with the pairs of uprights forming the Samson post structure previously described, the flanges of the braces being preferably notched and welded .to the uprights as best shown in Fig. 1.

Interconnecting the uprights I8 I 9 and 2li-2l 25 are channels 38 and 39 carrying lower tracks 40 and 4I, on their upper anges. Cooperating with the lower Vtracks 40 and 4I are upper bars or tracks `42 and l43 to form ways 44 and 45 for flanged rollers 45 and 4T on a walking beam saddle 4B. The saddle 43 has a plate to which a walkingbeam 43 is secured. The walking beam is also shown of I-section and has its forward end projecting between the uprights of the guide support and its rear end extending beyond the 35 rear terminals of the tracks to carry a plurality of counterweights 5I! that are threaded on the end of the beam as in standard practice.

Supported on the forward end of the beam is a nose member 5I carrying a rod hanger 52 to which the polish rod 53 is connected as in conventional manner. The nose member 5I is hingedly connected with an ear 54 attached to the upper iiange of the walking beam by a pin 55 extending through cooperating ears 55 on the 45 nose member. The nose member is latchingly retained in operative position at the end of the beam by a pin 53 passing through a sleeve carried on the lower ange of the beam and through the nose member. It is thus obvious that when the pin is inserted as shown in Figl, the nose member of the walking beam is rigidly secured from hinging movement, however, when the pin 58 is removed and the polish rod disconnected from the hanger, the nose member may be swung back from over the center of the well to permit pulling of the rods, tubing, or performing of other well operations.

Fixed to the lower ange of the walking beam, at a point ahead of the Samson post structure, is a plate S9 of a cross head 6i). The cross head carries a transverse shaft $2 having its ends pivotally connected with pitmans 63 and 64 which have their lower ends connected with

crank arms

65 and 65 on the crank shaft $1 of the transmission. The actuating shaft 68 of the transmission is provided with a pulley 69 that is driven by a belt 'it operating over a pulley 'll on the operating shaft of a prime mover such as a motor l2.

With the structure thus far described it is obvious that rotation of the cranks cause oscillatory movement of the beam so that the forward end thereof would normally move in an arc about the a-xis of therollers 46 and 4l, however, in order to provide for straight lift of the rods the forward end of the beam is retained for vertical movement while the wheels are caused to roll on the tracks to slide the beam relatively to the Samson post. This is accomplished by providing the inner faces of the uprights forming the guide support with guide blocks i3 and M having arcuate shaped guide grooves 15 and 'i6 positioned reversely to the normal arcuate movement of the beam. The lower flange of the beam carries a cross head Vl having rollers E8 and i9 operable in the respective guide grooves.

A pumping rig constructed as described is mounted on a suitable foundation with the rod hanger 52 located directly over the axis of the well when the beam is in horizontal position. The polish rod is then connected with the hanger and the transmission is operably connected with the prime mover such as the motor illustrated. Upon energization of the motor the pulley 'H drives the transmission pulley 69 through the belt 'l0 to cause rotation of the cranks 65 and 6b and rocking of the beam through the pitmans 63 and 64. As the beam moves above horizontal position the rollers 18 and T9 operating in the respective guide grooves move toward the upper ends of the slots causing the entire beam to be moved forwardly with'the wheels 45 and 4l operating on tracks 4U and M. Forward movement of the beam is in exact synchronism with the upward movement of the beam so that the rod hanger is retained in direct alignment with the axis of the well. As the cranks pass top dead center the movement of the beam is reversed so that the rollers move downwardly in the guide grooves to shift the entire beam in a rearward direction, again maintaining the hanger in axial alignment with the well hole. As the beam moves below horizontal position it is again projected in a forward direction by reason of the rollers i8 and 19 entering the lower portions of the guide grooves, again causing the beam to shift in a forward direction to maintain the alignment of the rod hanger. It is thus obvious that during oscillation of the beam a straight lift is exerted during the `entire stroke of the rods, thereby eliminating any tendency for the rods to buckle or bend under thrusts imparted by the beam.

With the construction thus described the Samson post and guide support are rigidly supported relatively to each other and while a straight lift is provided on the beam, the only moving parts art the wheels on which the beam fulcrums and the guide rollers that are carried in the forward end of the beam to control relative sliding movement of the beam on the Samson post.

What I claim and desire to secure by Letters Patent is:

1. A well pumping apparatus including a support, a Samson post structure carried on the support, a track carried by the Samson post structure, a walking beam, a shifting support on said track, means pivotally mounting the walking beam on the shifting support, a guide support, cam means carried by the guide support adjacent one end of the beam, means on the beam engaging the cam means for shifting the beam relatively to the track incidental to I rocking movement of the beam, means for rocking the beam on said pivotal mounting, and brace means connecting the Samson post structure with the guide support.

2. A well pumping apparatus of the character .c

of the beam, means on the base frame for rock- ,l

ing the beam, a counterbalance fixed to the opposite end of the beam, and brace means connecting the Samson post structure with the guide support to resist thrusts imparted incidental to pivotal shifting of the beam.

ALBERT N. PORTER.