CN2293661Y

CN2293661Y - Three times stroke rod oil-well pump

Info

Publication number: CN2293661Y
Application number: CN 96238829
Authority: CN
Inventors: 刘佳秋
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-18
Filing date: 1996-10-18
Publication date: 1998-10-07
Anticipated expiration: 2006-10-18

Abstract

The utility model relates to an underground rod tubing oil well pump with three-time stroke for oil production. The utility model is characterized in that on the basis of an existing rod oil well pump, a pump barrel is lengthened, and three plunger draw rods are additionally arranged in an original hydraulic cylinder. When the utility model works, each plunger in the oil well pump can be contracted in the hydraulic cylinder simultaneously; when a pumping rod of a pumping unit on the ground is operated, the pumping rod can drive the plungers to move vertically, so that a piston can be extended out of or retracted into a stroke increasing liquid lever step by step, and the piston can play a role in increasing the stroke of a pump body; accordingly, the purpose of oil pumping with long stroke and large displacement under the condition of unchanging the stroke frequency of the pumping unit on the ground can be realized. The pump has the advantages of simple structure and low cost, so that the pump can be widely used for pumping wells in oil fields.

Description

Three times of strokes have rod tube formula oil well pump

The utility model belongs to the oil field extracting device of oil; Be particularly related to the three times of strokes in a kind of down-hole that is used to recover the oil rod tube formula oil well pump is arranged.Rod pumping pump has become in the existing technology than mature technique, generally is used for the oil field and recovers the oil, and has received better effects, and this pump its working efficiency in the running is lower.The oil pumping amount height of all pumping units, what of the working stroke of major decision ground pumping unit and jig frequency, therefore, domestic and international most of pumping unit all is to study on raising stroke and jig frequency, a kind ofly can improve the whole cartridge type that the pumping unit working efficiency do not transform pumping unit again and have rod tube formula oil well pump also can realize above-mentioned target, its only needs just improve a little and can realize the piston region in the pump housing on existing pumping technology pump foundation.

The purpose of this utility model is that a kind of " three times of strokes have rod tube formula oil well pump " this device that provides in order to overcome above-mentioned shortcoming is to be increased to three piston pulling rods by a piston rod in former oil well pump increases journey fluid cylinder cylinder body, piston can flexiblely automatically step by step increase in the journey liquid cylinder to oil well pump when fluid cylinder was worked in pump, thereby played the effect of suction crude oil.

Implementation of the present utility model is:

When this oil well pump uses, by oil pipe the pump housing is lowered in the oil well, when the sucker rod of ground pumping unit moves downwards, because pump inner carrier pull bar is under the sucker rod action of gravity, it is descending to promote the fluid cylinder post, hydraulic oil gives flexible piston to downward movement propagation of pressure by plunger again under pressure in the cylinder, finishes the journey that increases of down stroke and moves; When sucker rod is made upstroke under pumping unit drives, the fluid cylinder plunger pull bar that is bound up on the sucker rod lower end drives upwards operation of cylinder plunger again, hydraulic oil under pressure in the cylinder, make flexible piston do upstroke again owing to influenced by decompression, finished the journey that increases of upstroke so again and moved, the above-mentioned whole upper and lower stroke movement of sucker rod that increases journey action and ground pumping unit carries out synchronously.Make crude oil constantly be sucked into ground through the pump housing.

When the utility model advantage is to use, only needing increases certain-length with former pump barrel on former rod-type pumping unit basis, increase the journey cylinder body in corresponding piston and increase to three piston pulling rods, promptly in cylinder body, be increased to three piston pulling rods by a piston rod, just can be issued to the big discharge capacity oil pumping of long stroke purpose, thereby can save main large number of ground equipment in the jig frequency situation that does not change the ground pumping unit.

The utility model is provided by following examples:

Below in conjunction with accompanying drawing the utility model is described further.

Accompanying drawing: three times of strokes have bar tubing pump oil well pump structural representation.

A kind of three times of strokes that are used to recover the oil have rod tube formula oil well pump; By sucker rod 1, oil pipe 2, plunger pull bar 3, pump barrel box cupling 4, increase the flexible piston rod 8 of journey liquid thick stick 5 jump rings 6, carrying cylinder 7, one-level, the outer box cupling 9 oil well pump linings 10 pump barrel outer tubes 11 of pump barrel, the flexible piston rod 12 of secondary, pump barrel box cupling 13, three grades of flexible piston rods 14, oil well pump piston 15, tubing nipple 16, auxiliary valve ball 17, fixed valve ball 18, standing valve ball seat 19, fixed valve base joint 20, tail pipe 21, sleeve pipes 22 are formed.It is characterized in that this pump is on existing bar oil well pump basis, flexible piston rod 8 the insides of one-level in the pump housing supercharging fluid cylinder 5 are penetrated the flexible piston rod of a secondary, in second piston rod 12, penetrate three grades of flexible piston rods 14 again, round platform rank are arranged respectively at the bottom of second piston rod and three grades of piston rods, the stepped diameters of three grades of piston rods is identical with the internal diameter of the flexible piston rod 12 of secondary, the stepped diameters of the flexible piston rod of the stepped diameters of second piston rod and one-level and stroke cylinders internal diameter are together, three grades of flexible piston rods and piston thereof can be contracted in the stroke fluid cylinder 5 simultaneously, piston during work below the piston rod can extend under the hydraulic pressure in cylinder body and withdrawal step by step, between every grade of piston rod be sealed sliding movingly, the one circular groove step at position, piston rod top can play barrier effect, when bar stretches out, can be stopped by step in the piston rod of top, prevent the piston rod extraction; And then pump is contained in oil pipe the inside, be equipped with in pump barrel outer tube 11 and the ground carrying cylinder 7 and increase journey fluid cylinder 5, increasing journey fluid cylinder top by screw thread box cupling and plunger pull bar 3 and sucker rod 1 connection, when the ground pumping unit is worked, sucker rod drives the plunger pull bar and moves up and down, because every grade of flexible rod is a hollow stem, thereby can make and increase one in the journey fluid cylinder 5, two, three grades of flexible piston rod elongations and withdrawal step by step under the hydraulic pressure in cylinder body, liquid flows to ground from increasing journey fluid cylinder 5 with the gap of the carrying cylinder 7 that increases journey fluid cylinder outside and the annular space of oil pipe and sucker rod in the well under the oil well pump effect; Inside move up and down along its inwall at its oil well pump piston outside oil well pump lining 10, a piston in addition, the lower end of oil well pump lining 10 is fixed with the outer box cupling 9 of pump barrel, and fixed valve base 19 is equipped with in the bottom of this box cupling, there is a valve ball 18 the valve seat the inside.

The piston material of this pump is that the fine oil resistant rubber of fourth is made, between piston and the oil well pump lining for being slidingly matched.

Claims

1. the three times of strokes in a down-hole that is used to recover the oil have rod tube formula oil well pump: by the sucker rod in the pump housing (1), oil pipe (2), plunger pull bar (3), increase journey fluid cylinder (5), jump ring (6) and pump barrel outer tube (11) and increase the carrying cylinder (7) that holds fluid cylinder outside and oil well pump piston (15), tubing nipple (16), auxiliary valve ball (17), fixed valve ball (18) and tail pipe (21) form; It is characterized in that this pump is on existing technology sucker rod pumping pump foundation the flexible piston rod (8) of the one-level the inside that increases in the journey fluid cylinder (5) in the pump housing to be penetrated the flexible piston rod of a secondary, in second piston rod (12), penetrate one three grades flexible piston rods (14) again, one, round platform rank are arranged respectively at the bottom of second piston rod and three grades of piston rods, the stepped diameters of three grades of piston rods is identical with the internal diameter of the flexible piston rod (12) of secondary, the stepped diameters of the flexible piston rod of the stepped diameters of second piston rod and one-level with increase journey oil hydraulic cylinder internal diameter with, above-mentioned three grades of flexible piston rods can be contracted in the stroke fluid cylinder (5) simultaneously, piston during work below the piston rod can extend under the hydraulic pressure in cylinder body and withdrawal step by step, between every grade of piston rod be sealed sliding movingly, there is a circular groove step at position, piston rod top, increasing journey fluid cylinder upper part by screw thread box cupling and plunger pull bar (3) and sucker rod (1) connection, be with an oil well pump lining (10) in oil well pump piston outside, the lower end of oil well pump lining (10) is fixing with the outer box cupling (9) of a pump barrel, fixed valve base (19) is equipped with in the bottom of this box cupling, and there is a valve ball (18) the valve seat the inside.

2. three times of strokes according to claim 1 have rod tube formula oil well pump, and the material that it is characterized in that pump piston is that the fine oil resistant rubber of fourth is made, between piston and the oil well pump lining for being slidingly matched.