ONE-DRIVEN-TWO PUMPING UNIT

UNE POMPE ENTRAINEE ET DEUX UNITES DE POMPAGE

English Abstract

The invention provides a One-driven-two Pumping Unit for cluster wells in
which
double-well pump is driven by a prime mover. The pumping unit comprises a
prime
mover and double-well mechanical linkage arms. The core structure of the
invention is a
pantograph mechanism consisting of four proportional pivoted rods.

Claims

The Embodiments Of The Invention In Which An Exclusive Property Or Privilege
Is Claimed Are Defined As Follows:
1. A One-driven-two Pumping Unit, comprising:
a pump jack base;
double-well mechanical linkage arms;
a prime mover,
a pivot connector interconnecting said prime mover and said double-well
mechanical
linkage arms.
2. A One-driven-two Pumping Unit of claim 1, wherein said double-well
mechanical
linkage arms assembly comprising:
a pair of equal length upper rods pivoted together on one of their ends, the
other ends
of these two upper rods being two loading point for two wells;
a pair of equal length lower rods pivoted together on one of their ends, the
joint
pivoted to said pump jack base, two lower rods coming out from the pivot point
at a V,
the other end of each lower rod pivoted to the middle of each upper rod
respectively;
3. A One-driven-two Pumping Unit of claim 2, wherein said upper rods are twice
as
long as said lower rod.
4. A One-driven-two Pumping Unit of claim 1, wherein said prime mover
comprising:
a frame;
a pantograph mechanism consisting of four proportional pivoted rods;
a power unit;
a vertical chute mounted on said frame:
a slider in said vertical chute;
a crank connected to said power unit at one end and connected to said slider
at the
other end;
a horizontally movable pivot support mounted on said frame.
5. A One-driven-two Pumping Unit of claim 4, wherein said pantograph mechanism
assembly comprising:
a pair of equal length upper rods pivoted together on one of their ends;
a longer lower rod and a shorter lower rod pivoted together at one of their
ends, these
two lower rods coming out from their joint at a V, the other end of each lower
rod
pivoted to the mid of each upper rod respectively to make each lower rod
parallel to
one of the upper rods respectively, the pivot point of two lower rods being in
conjunction with the ray created by the two bottom ends of each upper rod.
6. A One-driven-two Pumping Unit of claim 5, wherein said upper rod is
proportional to
said shorter lower rod at variable length ratio.
7. A One-driven-two Pumping Unit of claim 5, wherein the bottom end of one
upper rod
is a loading point and the bottom end of the other upper rod is a fixed point
which is
connected to said horizontally movable pivot support whereby the joint is able
to be
4

horizontally adjusted.
8. A One-driven-two Pumping Unit of claim 5, wherein said pivot point of two
lower
rods is a drive point which is connected to said slider in said chute.
9. A One-driven-two Pumping Unit of claim 5, wherein said pivot point of two
lower
rods can be pivoted to a support and becomes a fixed point while making the
bottom
end of one upper rod a loading point and the bottom end of the other upper rod
a drive
point.
10. A One-driven-two Pumping Unit of claim 1, wherein said pivot connector
connects
said loading point of prime mover and one of said loading points of double-
well
mechanical linkage arms therefore said double-well mechanical linkage arms can
be
driven by said prime mover.
11. The combination defined in claim 1, wherein said prime mover can be a
signal pump
jack by adding a counterweight.

Description

CA 02700620 2010-04-20
One-driven-two Pumping Unit
This invention provides a One-driven-two Pumping Unit which relates generally
to
improvements in oil well pumping units by reducing energy consumption
dramatically.
Background Of The Invention
It is well known that there are a few defects of the conventional walking beam
pumpjack,
such as changing joint load, uneven driving energy and huge energy
consumption. By
applying a pantograph mechanism of four proportional pivoted rods, this
invention is
designed against the defects of the most commonly used beam pump, including
confined
stroke displacement by its structure, poor balance performance and restricted
stroke
lifetime by its flexible connection. The designed pumping unit has the
advantages of
large stroke displacement, light-bar structure and rigid joint to sucker rod
which removes
the limitation of stroke lifetime. In addition, it is a balanced system with
less energy loss.
Another advantage of the unit is that its hanging position and stroke
displacement are
adjustable.
Summary Of The Invention
The invention provides a One-driven-two Pumping Unit which comprises a prime
mover
and double-well mechanical linkage arms. A pantograph mechanism of four
proportional
pivoted rods is applied in both of these two sections. The prime mover is a
Pivoted Rod
Pump without counter weight and can be used as a single pumpjack by adding a
counter
weight. The double-well mechanical linkage arms consists of four proportional
pivoted
rods.
In the drawings, which form a part of this specification,
Fig. I is a schematic view of a prime mover.
Fig. 2 is a schematic view of double-well mechanical linkage arms pivoted to a
pump
jack base.
Fig. 3 is a schematic view of a prime mover with a counterweight added.
I

CA 02700620 2010-04-20
Detailed Description Of The Invention
This invention is a compound drive pumping units for cluster wells that double-
well
pumps are powered by a prime mover. Reference is made to the accompanying
drawings
in which is shown an illustrative embodiment of the invention from which its
features and
advantages will be apparent.
This pumping unit consists of a prime mover, a pump jack base and double-well
mechanical linkage arms.
As shown in Fig. 1, a prime mover comprises a frame 10, a power unit 13, a
vertical
chute 14 mounted on the frame 10, a slider 16 in the vertical chute 14, a
crank 12, a
horizontally movable pivot support 11 and a pantograph mechanism consisting of
four
proportional pivoted rods. Its core structure is a pantograph mechanism
consisting of four
proportional pivoted rods. Two equal length upper rods 3 and 4 are pivoted
together on
one of their ends. A longer lower rod 5 and a shorter lower rod 6 are pivoted
together at
one of their ends. These two lower rods 5 and 6 come out from their joint 7 at
a V. The
other end of each lower rod is pivoted to the mid of each upper rod
respectively to make
each lower rod parallel to one of the upper rods. The pivot point 7 of two
lower rods is in
conjunction with the ray created by the two bottom ends 8 and 9 of each upper
rod. The
upper rod 3 (or 4) is proportional to the shorter lower rod at variable length
ratio (which
is 4 in the Fig.). The bottom end 9 of upper rod 4 is pivoted to a
horizontally movable
pivot support 11 which is mounted on a frame support 10 and the pivot point
can be
horizontally adjusted as request. Joint 7 of the two lower rods is pivoted to
a slider 16 in a
vertical chute 14. The crank 12 is connected to the power unit 13 at one end
and is
connected to the slider 16 at the other end. Driven by the power unit, the
slider 16 (joint 7)
will be doing vertical reciprocating motion. Meanwhile, the loading joint 8 of
the upper
rod 3 will be doing vertical reciprocating motion correspondingly. The
displacement of
joint 8 will be amplified in proportion to the displacement of joint 7. The
loading point 8
can be adjusted horizontally by horizontally moving joint 9.
As shown in Fig. 2, the double-well mechanical linkage arms is a pantograph
mechanism
described previously with two equal length upper rods being twice as long as
two equal
length lower rods. The connection point of two lower rods is pivoted to a pump
jack base
15. The bottom ends I and 2 of each upper rod are the two loading rigid
suspension joints
to which the sucker rods of #1 and 92 well are going to be connected. By
vertically
displacing joint 2, joint I will be moving vertically to an opposite
direction. One of those
two suspension joints I or 2 (which is joint 2 in the figure) is pivoted to
the loading joint
8 of the prime mover.
The double-well pumping unit is powered by the power unit 13 of the prime
mover. By
vertically displacing joint 7, vertical displacement of joint 8 will be
amplified in
proportion to the displacement of joint 7 through the pantograph mechanism of
four
proportional pivoted rods. So are joints I and 2. The motion direction of
joint I and 2 is
opposite. That makes the pumping process of two wells has 180 phase
difference.
Driven by the prime mover, the suspended joint 2 of #2 well moves up and pumps
oil
2

CA 02700620 2010-04-20
while joint I of #1 well moves down and releases it potential energy which
assists #2
well pumping, and vice versa. Since this compound drive pumping units is a
balanced
mechanical system, it does not need counter weight for the prime mover. It
takes full
advantage of driving power. So energy consumption would be lower dramatically
by
using this compound drive pumping units.
Referring now to Fig. 3, a prime mover will become a single pump jack by
adding a
counterweight 17.
There has been disclosed heretofore the best embodiment of the invention
presently
contemplated. However, it will be apparent that the principles and features of
this
invention may be employed in various and numerous embodiments without
departing
from the scope of the invention.
3