CN1124824A

CN1124824A - Reciprocating piston reversible recovery delivery pump

Info

Publication number: CN1124824A
Application number: CN 94112683
Authority: CN
Inventors: 胡俊威; 许永斌
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-13
Filing date: 1994-12-13
Publication date: 1996-06-19

Abstract

The bidirectional reciprocating piston pump for underground oil sucking and delivery or liquid delivery through ground pipeline with the efficiency increased by one time features that oil inlet hole for upper pump cavity and oil outlet holes for upper and lower pump cavities are respectively made on piston moving in pump casing, the oil inlet hole is made on lower end cover of pump casing, said oil outlet holes communicating with inner cavity of piston rod have commutating seals between them, said oil inlet hole has movable seal, oil-delivering hole to oil pipe is made on piston rod, and oil pipe is fixed to pump casing.

Description

Reciprocating piston reversible recovery, defeated pump

The present invention relates to a kind of pump, particularly a kind of reciprocating piston reversible recovery, defeated pump are mainly used in that the down-hole, oil field is adopted, the conveying of output oil or other liquid.

At present widely used its structure of down-hole oil production pump of each elephant is: as shown in Figure 5: being provided with in the pump block 7 can axially movable piston 10 along pump block 7, be connected with pull bar 2 on the piston 10, cover at the upper and lower end of pump block 7 and to be respectively equipped with delivery outlet 6 and oil-sucking hole 12, piston 10 is provided with piston oilhole 9,

dynamic seal

5,8,11 is equipped with at delivery outlet 6, piston oilhole 9, oil-sucking hole 12 places respectively, the end of pump block 7, all be connected to filter 13, and the top of pull bar 2 is provided with the tooth bar that cooperates with oil pumping unit gear 1.During use pump block 7 is placed the down-hole, between the pump block 7 and the borehole wall 3 packet 4 is housed, when the motoring eccentric wheel made gear 1 reciprocally swinging, pull bar 2 is to-and-fro motion thereupon also, then piston 10 to-and-fro motion in pump block 7, when piston 10 moved upward, lower oil cavitie 15 volumes increased, and pressure reduces, dynamic seal 11 is opened, upper oil cavitie 14 volumes diminish, and pressure increases dynamic seal 8 closes, and 5 open, lower oil cavitie 15 sucks crude oil at this moment, crude oil in the upper oil cavitie 14 is discharged from, and when piston 10 moved downward, lower oil cavitie 15 volumes diminished, pressure increases, it is big that upper oil cavitie 14 volumes become, and pressure reduces, dynamic seal 5,11 close, 8 open, this moment, the crude oil of lower oil cavitie entered upper oil cavitie through piston oilhole 9, and down-hole crude oil is exported in circulation successively.There is following shortcoming in existing this recovery delivery pump: shot, and promptly when rising, piston recovers the oil, and piston does not recover the oil when descending, just the fluid in the lower oil cavitie is discharged to upper oil cavitie, prepare sufficient fluid during for piston stroking upward, so inefficiency, waste energy.

The purpose of this invention is to provide a kind of piston and in two-way travel, all can adopt the reciprocating piston reversible recovery of oil transportation liquid, defeated pump, with raise the efficiency, energy saving.

Technical solution of the present invention is: a kind of reciprocating piston reversible recovery, defeated pump, it comprises pump block 29, reciprocating piston 42 in pump block 29, the pull bar 16 that joins with piston 42, it is characterized in that: pump block 29 be respectively equipped with upper end cap 21 and lower end cap 47 up and down, be connected to the reciprocating piston rod 17 in the mesopore of upper end cap 21 of tubular between pull bar 16 and the piston 42, the opposite side of piston 42 be connected in the mesopore of lower end cap 47 reciprocating on pump chamber oil inlet pipe 28, piston 42 is provided with to be communicated with goes up pump chamber oil inlet pipe 28 and piston 42 and the upper end cap 21 formed last pump chamber oil inlet holes 41 of going up pump chamber 39, the last pump chamber output oil hole 23 of the endoporus 51 of pump chamber 39 and piston rod 17 in the connection, the following pump chamber output oil hole 26 of the endoporus 51 of pump chamber 27 and piston rod 17 under being communicated with, between last pump chamber output oil hole 23 and following pump chamber output oil hole 26, be provided with the Sealing 25 that in the hole, slidably commutates, lower end cap 47 is provided with down pump chamber oil inlet hole 46, last pump chamber oil inlet hole 41 and following pump chamber oil inlet hole 46 places are provided with

dynamic seal

22 and 30 respectively, and piston rod 17 is provided with oil transportation hole 52.

Be provided with non-return Sealing 38 in the endoporus 51 of described piston rod 17.

Described pump block 29 bottoms are provided with filtrating equipment.

The present invention compared with prior art, owing between pull bar 16 and piston 42, be connected to the piston rod 17 of tubular, the opposite side of piston 42 is connected to pump chamber oil inlet pipe 28, piston is provided with pump chamber oil inlet hole 41 and is communicated with to guarantee pump chamber 39 and last pump chamber oil inlet pipe 28, also be provided with make that pump chamber 39 and following pump chamber 27 be communicated with piston rod cavity respectively on, following pump chamber

output oil hole

23,26, and be provided with the Sealing 25 that movably commutates in the hole, on lower end cap 47, be provided with pump chamber oil inlet hole 46 down, on, following pump chamber oil inlet hole 41,46 places are equipped with

dynamic seal

22,30, piston rod 17 is provided with the oil transportation hole 52 that is communicated with piston rod endoporus 51 and transport pipe inner chamber 36, therefore this device has when reciprocating motion of the pistons, on both direction, all can adopt, the advantage of oil transportation liquid, be double-stroke work, overcome the deficiency of existing unidirectional acting pump, raised the efficiency one times.

Below in conjunction with the drawings and the specific embodiments the present invention is further described:

Fig. 1 is master's sectional view when piston is in the lower end in the specific embodiment of the invention;

Fig. 2 is master's sectional view when piston is in the upper end in the specific embodiment of the invention;

Fig. 3 is the assembly structure schematic representation of piston 42;

Fig. 4 is an A-A sectional view shown in Figure 3;

Fig. 5 is the structural representation of recovery delivery pump in the prior art.

Shown in Fig. 1 or 2: 29 is pump block, tie at the upper end snail of pump block 29 and to connect pressing plate 19, be fixed with Sealing 20 and upper end cap 21 between top board 19 and the pump block 29, top board 19 upper end snails tie and connect transport pipe 18, with bolt 37 top board 19 and upper end cap 21 are fixed together.Lower end at pump block 29 is fixed with press table 48 with bolt 32, be fixed with Sealing 31 and lower end cap 47 between press table 48 and the pump block 29, be processed with six equally distributed pump chamber oil inlet holes 46 down on the lower end cap 47, on the boss of lower end cap 47, be with dynamic seal 30 in axial sliding, just will descend pump chamber oil inlet hole 40 to block when being close to lower end cap 47 when dynamic seal 30 slides to.Being provided with in pump block 29 can axially movable piston 42, the be threaded piston rod 17 of tubular of the upside of piston 42, piston rod 17 in the mesopore of top board 19 and upper end cap 21 slidably, be provided with seal ring between upper end cap 21 and the piston rod 17, the downside of piston 42 has been threaded and has gone up pump chamber oil inlet pipe 28, last pump chamber oil inlet pipe 28 slidably, is provided with seal ring between lower end cap 47 and the last pump chamber oil inlet pipe 28 in the mesopore of press table 48 and lower end cap 47.

Shown in Fig. 3,4: be evenly distributed with four upper oil cavitie oil inlet holes 41 that are communicated with last pump chamber oil inlet pipe 28 on the piston 42, also be evenly distributed with four and go up pump chamber output oil hole 23, the downside of last pump chamber output oil hole 23 is following pump chamber output oil hole 26, and it is concentric with oilhole 23, commutation Sealing 25 is housed between two holes, when commutation Sealing 25 moves to lower dead centre, last pump chamber output oil hole 23 is communicated with oilhole 40, when commutation Sealing 25 moved to upper dead center, following pump chamber output oil hole 26 was communicated with oil outlet 40.Pump chamber output oil hole 23 places offer groove 53 (referring to Fig. 3,4) to the side on piston 42.As shown in Figure 4: 24,43 be respectively the auxiliary hole plug.

As shown in Figure 1: be provided with two seal rings 44 between piston 42 and the pump block 29.Be with slidably dynamic seal 22 on the piston rod 17; Be with back-up ring 45 on the last pump chamber oil inlet pipe 28.Inner chamber at piston rod 17 is equipped with non-return Sealing 38, and the upper end screw thread of piston rod 17 is connected with pull bar 16, and is processed with equally distributed oil transportation hole 52.

As shown in Figure 1: be fixed with filter stand 33 in the bottom of pump block 29, the outside of filter stand 33 is fixed with filter screen 34.

In use, this pump is placed the down-hole, between the transport pipe 18 and the borehole wall 49 packet 50 is housed, the upper end of pull bar 16 is processed with tooth bar and stretches out outside the well and is meshed with the gear of oil pumping unit, when 16 to-and-fro motion of oil pumping unit gear drive pull bar, piston 42 to-and-fro motion in pump block 29.Its working procedure is: as shown in Figure 1: when piston 42 moves downward, lower oil cavitie 27 volumes of piston bottom diminish, pressure increases, and upper oil cavitie 39 volumes become big pressure reduction, sealing this moment is gone up pump chamber oil inlet hole 41 dynamic seal 22 and is opened, the sealing dynamic seal 30 of pump chamber oil inlet hole 46 is down closed, commutation Sealing 25 is in upper dead center, filtered crude oil inherent filtration device inner chamber 35, through last pump chamber oil inlet pipe 28, last pump chamber oil inlet hole 41 enters in the pump chamber 39, and pump chamber output oil hole 26 under the crude oil warp in the following pump chamber 27, oil outlet 40 enters the endoporus 51 of piston rod 17, enters the inner chamber 36 of transport pipe 18 through oil transportation hole 52 again and transfers out.As shown in Figure 2: when piston 42 moves upward, top upper oil cavitie 39 volumes of piston 42 diminish, pressure increases, it is big that the volume of lower oil cavitie 27 becomes, pressure reduces, sealing this moment is gone up the dynamic seal 22 of pump chamber oil inlet hole 41 and is closed, the sealing dynamic seal 30 of pump chamber oil inlet hole 46 is down opened, commutation Sealing 25 is in lower dead centre, meanwhile, and filtered crude oil inherent filtration device inner chamber 35, following pump chamber oil inlet hole 46 enters down in the pump chamber 27, and the crude oil of going up pump chamber 39 is through groove 53, last pump chamber output oil hole 23, oil outlet 40 enters the inner chamber 51 of piston rod 17, enters the inner chamber 36 of transport pipe 18 through oil transportation hole 52 again and transfers out.Reach piston two-way and all can adopt the purpose of oil transportation liquid, raise the efficiency one times.

This device also can be applicable to surface duct liquid and carries, and to play pressurization, makes the interior liquid of pipeline unimpeded.

Claims

1, a kind of reciprocating piston reversible recovery, defeated pump, it comprises pump block [29], reciprocating piston [42] in pump block [29], the pull bar [16] that joins with piston [42], it is characterized in that: pump block [29] be respectively equipped with upper end cap [21] and lower end cap [47] up and down, be connected to the reciprocating piston rod in the mesopore of upper end cap [21] [17] of tubular between pull bar [16] and the piston [42], the opposite side of piston [42] is connected to the reciprocating pump chamber oil inlet pipe [28] of going up in the mesopore of lower end cap [47], piston [42] is provided with to be communicated with goes up pump chamber oil inlet pipe [28] and piston [42] and the formed last pump chamber oil inlet hole [41] of going up pump chamber [39] of upper end cap [21], the last pump chamber output oil hole [23] of the endoporus [51] of pump chamber in the connection [39] and piston rod [17], the following pump chamber output oil hole [26] of the endoporus [51] of pump chamber [27] and piston rod [17] under being communicated with, between last pump chamber output oil hole [23] and following pump chamber output oil hole [26], be provided with the Sealing [25] that in the hole, slidably commutates, lower end cap [47] is provided with down pump chamber oil inlet hole [46], last pump chamber oil inlet hole [41] and following pump chamber oil inlet hole [46] locate to be provided with respectively dynamic seal [22] and [30], and piston rod [17] is provided with oil transportation hole [52].

2, reciprocating piston reversible recovery according to claim 1, defeated pump, it is characterized in that: be provided with non-return Sealing [38] in the endoporus [51] of described piston rod [17].

3, reciprocating piston reversible recovery according to claim 1 and 2, defeated pump, it is characterized in that: described pump block [29] bottom is provided with filtrating equipment.