CN205370930U - Liquid extrusion pump - Google Patents

Abstract

The utility model relates to a liquid extrusion pump belongs to mechanical oil extraction equipment. Including inner tube assembly, sucker rod assembly, salvage section of thick bamboo assembly and check valve assembly, inner tube top connection, inner tube joint, inner tube and inner tube head be the series connection in order, locks with the jackscrew, several for the pull rod coupling establish ties into the pull rod assembly, short pump barrel direction head, short pump barrel and by the many salvage section of thick bamboo threaded connection that the coupling is established ties for the pump barrel, the built -in seal cover of short pump barrel, the check valve assembly comprises one -way valve bonnet, valve ball, disk seat and oil inlet, it is connected with one -way valve bonnet to salvage a section of thick bamboo, in the sucker rod is arranged the inner tube in and is salvaged a section of thick bamboo, with the pull rod articulate, inner tube top connection and defeated oil pipe line connection. The benefit can reduce the oil pipe length of the intraductal installation of cover, greatly reduced oil well exploitation cost, salvage section of thick bamboo bailing well liquid, do not receive whether to be full of in the oil pipe restriction of well liquid, can salvage at any time, carry at any time, the inner tube only contacts with short pump barrel, shortens the contact surface length of pump barrel and inner tube, reducing wear and so on.

Description

A kind of liquid extrusion pump

Technical field

This utility model belongs to a kind of mechanical oil recovery equipment, is specifically related to a kind of liquid extrusion pump.

Background technology

One of oil production equipment that oil field is conventional is oil well pump, and the element of oil well pump includes pump barrel, plunger, standing valve and travelling valve.Oil well pump drives the reciprocating motion in pump barrel of the plunger with upper valve body and lower valve body to carry out swabbing well liquid by sucker rod.In swabbing well liquid process, underground equipment parts are more many, and the probability broken down is more big, and the cost of pump is also high.

Summary of the invention

Goal of the invention of the present utility model is to provide a kind of liquid extrusion pump, extruding that liquid produces when entering the hollow inner core of minor diameter from major diameter fishing socket by liquid is utilized to form certain lift, by this combined effect lifting up and extruding, industrial pipeline is clamp-oned by carrying the liquid drawn, realize simplifying oil well pump structure, reduce oil well pump manufacturing cost, reduce equipment fault and abrasion etc..

A kind of liquid extrusion pump, including inner core assembly, sucker rod assembly, fishing socket assembly and check valve assembly；Inner core assembly is made up of inner core top connection, inner core joint, inner core and inner core head；Inner core top connection, inner core joint, inner core, inner core head are connected in series with screw thread " yi word pattern " successively, lock with jackscrew, and the lower end of inner core head is conical head；Sucker rod assembly is to be serially connected in long draw by many pull bar box cuplings；The structure of fishing socket assembly is: many pump barrel box cuplings " yi word pattern " are connected into fishing socket, the cylinder lower end of the upper end of fishing socket and short pump barrel is to threaded, the built-in sealing shroud of short pump barrel cylinder, locks with short pump barrel guide head, and the cavity upper end of short pump barrel guide head has interior wedge-shaped opening；Threaded with beyond the upper end of reducer union in the lower end of fishing socket；Fishing socket assembly is isometric with inner core assembly；Check valve assembly is made up of unidirectional valve bonnet, valve ball, valve seat and oil-in, the top of unidirectional valve bonnet is with the rod head of one, valve ball is positioned at unidirectional valve bonnet, it is placed on the valve seat at gear platform place, unidirectional valve bonnet lower end, threaded with beyond unidirectional valve bonnet lower end in the upper end of oil-in, and valve seat being held out against spacing in unidirectional valve bonnet, threaded with beyond the lower end of reducer union in the upper end of unidirectional valve bonnet；Sucker rod assembly is placed in the cylinder of inner core assembly and fishing socket assembly, and the end of long draw is with the rod head on unidirectional valve bonnet cover body to threaded, and the upper end of long draw is connected with surface drive.The upper end of inner core top connection with the lower end of petroleum pipeline to threaded.

Benefit of the present utility model is: can reduce the tubing length installed in sleeve pipe, it is possible to be greatly saved oil mining cost；Fishing socket bailing well liquid, not by the restriction whether being full of well liquid in oil pipe, it is possible to salvage at any time and be transported in petroleum pipeline；Inner core only contacts with short pump barrel, shortens the contact surface length of pump barrel and inner core, reduces abrasion；This utility model simple in construction, it is possible to reduce upper valve body assembly and down-hole standing valve assembly, it is to avoid valve body breaks down or damages and need the number of times of well workover, and underground work and gauze de-plugging operation, without installing gauze, are reduced in down-hole；Owing to the upper and lower operation of fishing socket is that portion carries out outer tube, it is absent from leakage and holddown phenomenon, carries out scraping Lasaxing Oilfield without oil pipe.

Accompanying drawing explanation

Accompanying drawing is the structure chart of a kind of liquid extrusion pump of this utility model；

Detailed description of the invention:

Referring to accompanying drawing, a kind of liquid extrusion pump, including inner core assembly, sucker rod assembly, fishing socket assembly and check valve assembly；Inner core assembly by inner core connects 1, inner core joint 2, inner core 3 and inner core head 5 form；Inner core top connection 1, inner core joint 2, inner core 3, inner core head 5 are connected in series with screw thread " yi word pattern " successively, lock with jackscrew 4, and the lower end of inner core head 5 is conical head；Sucker rod assembly is the long draw being serially connected in by many pull bars 7 box cupling 8；The structure of fishing socket assembly is: many pump barrel 12 box cuplings 13 " yi word pattern " are connected into fishing socket, the cylinder lower end of the upper end of fishing socket and short pump barrel 9 is to threaded, the built-in sealing shroud 10 of cylinder of short pump barrel 9, locking with short pump barrel guide head 11, the cavity upper end of short pump barrel guide head 11 has interior wedge-shaped opening；Fishing socket assembly is isometric with inner core assembly；Check valve assembly is made up of unidirectional valve bonnet 16, valve ball 17, valve seat 18 and oil-in 19, the rod head 15 of one is arranged at the top of unidirectional valve bonnet 16, valve ball 17 is positioned at the inner chamber of unidirectional valve bonnet 16, valve seat 18 is placed in the gear platform place of unidirectional valve bonnet 16 lower end, valve ball 17 is sitting on valve seat 18, threadeding with beyond the lower end of unidirectional valve bonnet 16 in the upper end of oil-in 19, and is held out against by valve seat 18 spacing in unidirectional valve bonnet 16；The upper end of the lower end of fishing socket, reducer union 14 and unidirectional valve bonnet 16 is connected in series with external screw thread；Sucker rod assembly is placed in the cylinder of inner core assembly and fishing socket assembly, the end of long draw with the rod head 15 on the cover body of unidirectional valve bonnet 16 to threaded；The upper end of long draw is connected with surface drive；The upper end of inner core top connection 1 with the lower end of petroleum pipeline to threaded.

Referring to accompanying drawing, when brake unit releases the braking to surface drive, fishing socket assembly is descending under the effect of deadweight, and immerses below down-hole liquid level, and valve ball 17 is by jack-up under fluid pressure effect, and liquid is entered in fishing socket by oil-in 19.Fishing socket is after down-hole stops certain time, and surface drive startup rotates backward, and long draw has been pulled upwardly, drive fishing socket assembly up together with check valve assembly, now, valve ball 17 sets on valve seat 18 under the fluid pressure effect in fishing socket, and the well liquid of fishing socket is lifted up to be picked up；When fishing socket by mention short pump barrel guide head 11 dock with inner core head 5 time, the conical head of inner core head 5 lower end inserts in the wedge-shaped opening that short pump barrel guide head 11 upper end is opened；Under the pulling up of pull bar 7, short pump barrel guide head 11 continues up along inner core head 5, inner core 3, inner core joint 2, with sealing shroud 10 slipper seal, owing to the internal diameter of fishing socket is more than the external diameter of inner core 3, the well liquid of fishing socket bailing is squeezed in inner core 3 in lifting up, and accelerates well liquid flow velocity in inner core 3 and petroleum pipeline, and fishing socket is lifted to peak, well liquid in fishing socket is lifted up, is squeezed into Industrial Transport oil pipeline, completes down-hole liquid bailing extruding course of conveying.

Claims (1)

1. a liquid extrusion pump, including sucker rod assembly, check valve assembly, inner core assembly and fishing socket assembly；Sucker rod assembly is the long draw being serially connected in box cupling 8 by many pull bars (7)；Check valve assembly is made up of unidirectional valve bonnet (16), valve ball (17), valve seat (18) and oil-in (19), valve ball (17) is positioned at the inner chamber of unidirectional valve bonnet (16), valve seat (18) is placed in the gear platform place of unidirectional valve bonnet (16) lower end, valve ball (17) is sitting on valve seat (18), threadeding with beyond the lower end of unidirectional valve bonnet (16) in the upper end of oil-in (19), and is held out against by valve seat (18) spacing in unidirectional valve bonnet (16)；It is characterized in that: the rod head (15) of one is arranged at the top of unidirectional valve bonnet (16)；Inner core assembly is made up of inner core top connection (1), inner core joint (2), inner core (3) and inner core head (5)；Inner core top connection (1), inner core joint (2), inner core (3), inner core head (5) are connected in series with screw thread " yi word pattern " successively, locking with jackscrew (4), the lower end of inner core head (5) is conical head；The structure of fishing socket assembly is: many pump barrels (12) are connected into fishing socket with box cupling (13) " yi word pattern ", the cylinder lower end of the upper end of fishing socket and short pump barrel (9) is to threaded, the built-in sealing shroud of the cylinder (10) of short pump barrel (9), locking with short pump barrel guide head (11), the cavity upper end of short pump barrel guide head (11) has interior wedge-shaped opening；The upper end of the lower end of fishing socket, reducer union (14) and unidirectional valve bonnet (16) is connected in series with external screw thread；Fishing socket assembly is isometric with inner core assembly；Sucker rod assembly is placed in the cylinder of inner core assembly and fishing socket assembly, the end of long draw with the rod head (15) on the cover body of unidirectional valve bonnet (16) to threaded；The upper end of long draw is connected with surface drive；The upper end of inner core top connection (1) with the lower end of petroleum pipeline to threaded.