CN209483320U - Self-flowing water injection pipe column of self-blowing well - Google Patents

Abstract

The utility model relates to a self-flowing water injection pipe column of a self-blowing well, which is sequentially connected with an oil pipe, a water injector, a packer and a tail pipe from top to bottom; a sealing ball connected with the bottom end of the sucker rod is arranged at the top of the water injector; the water injector comprises an outer pipe, an inner pipe, an upper joint and a lower joint, wherein the upper joint and the lower joint are provided with a central through hole; a plurality of supporting blocks are uniformly distributed on the side wall of the funnel in the circumferential direction, the supporting blocks form a ball seat capable of setting a sealing ball, and the surface of the ball seat, which is in contact with the sealing ball, is an arc surface; the upper joint is provided with a water injection pore channel, the lower end of the water injection pore channel is communicated with the annular channel downwards, the upper end of the water injection pore channel penetrates the supporting block upwards, and the upper end of the water injection pore channel is positioned in the arc surface. The self-flowing water injection pipe column of the self-blowing well adopts a mechanical forced opening and closing mode, so that the success rate of opening and closing a water injection pore channel is improved; the pipe column is provided with a through flow channel capable of settling sand, has sand blocking prevention and scale blocking prevention capabilities, and improves the stability of the pipe column.

Description

Flowing well flood suction tubing string

Technical field

The utility model is about a kind of oil-field flooding process unit more particularly to a kind of flowing well flood suction tubing string.

Background technique

Fracture-cavity type carbonate oil field part well constant volume feature is obvious, is suitble to water filling for oil exploitation, latter in oil well stop-spraying As from the well injection certain volume water supplement stratum energy, make oil well restore self-spray production.For desert, gobi oil field, because Oil well dispersion, no waterflood-transmission line is poor with tank car roping long-term injecting water development benefit, and some oil wells are in environmental sensitive area, no It is suitble to tank car roping, therefore scene carries out supplementing energy by the way of flood suction using fetching water from oil well upper formation itself.It is existing Have in technology, packer and multiple open sliding sleeve is installed generally on flow string, using packer packing oil removal water layer, by opening It opens and realizes flood suction with closedown sliding sleeve or stop infusing production.Due to sliding sleeve switch underground for a long time be resident be easy to appear fouling, Phenomena such as sand card, will lead to sliding sleeve switch and open or close failure, so that flowing well flood suction tubing string fails.

The present inventor based on years of experience and practice in relevant industries, proposes a kind of flowing well flood suction as a result, Tubing string, to overcome the deficiencies of existing technologies.

Utility model content

The purpose of this utility model is to provide a kind of flowing well flood suction tubing strings, to improve flowing well flood suction work The stability of skill tubing string.

The purpose of this utility model is achieved in that a kind of flowing well flood suction tubing string, including upper end are connected by oil pipe The injector connect, injector lower end are connected with packer, packer bottom end union tail by oil pipe；The packer setting in In pit shaft and insulate top aqueous layer and bottom oil layer；The top of injector is arranged in one ball sealer for being connected to sucker rod bottom end； The injector includes outer tube, inner tube and top connection and lower contact with central through hole, and outer wall connection in top connection lower part is outer Tube top portion, top connection lower inner wall connect at the top of inner tube；Lower contact external wall of upper portion connects outer pipe bottom, and lower contact upper inside wall connects Connect bottom of inner tube；Form circular passage between inner tube and outer tube, outer tube is equipped with the inlet openings of multiple perforation tube walls, in top connection Chamber is funnel-shaped；Multiple supporting blocks are circumferentially evenly equipped in hopper side walls, multiple supporting blocks constitute the ball seat that can set ball sealer, ball The surface that seat is contacted with ball sealer is in arc surface；Water filling duct is equipped in top connection, it is logical that water filling duct lower end is connected to downwards annular Road, water filling duct upper end upwardly penetrates through supporting block and water filling duct upper port is located in arc surface.

In a better embodiment of the utility model, the top connection, lower contact and outer tube and inner tube are made into integration.

In a better embodiment of the utility model, supporting block has certain thickness, the leakage between two supporting blocks The side wall that struggles against constitutes through-flow runner.

In a better embodiment of the utility model, the supporting block is arranged four.

In a better embodiment of the utility model, the inlet opening is arranged four.

In a better embodiment of the utility model, top connection external wall of upper portion connects the oil pipe of injector upper end, under The oil pipe of connector lower part outer wall connection injector lower end.

From the above mentioned, the beneficial effect of the utility model flowing well flood suction tubing string is: (1) being opened and closed using mechanical forced Mode improves water filling duct and unlatches and closes success rate；(2) design of string pipe, which has, to have sands-proof check with the through-flow runner of sand setting And antiscale card ability, to improve the stability of tubing string.

Detailed description of the invention

Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model It encloses.Wherein:

Fig. 1: for the structural schematic diagram of the utility model flowing well flood suction tubing string.

Fig. 2: for the schematic perspective view of injector in the utility model.

Fig. 3: for the schematic cross-sectional view of injector in the utility model.

Drawing reference numeral:

100, flowing well flood suction tubing string；

1, injector；

11, outer tube；

111, inlet opening；

12, inner tube；

13, top connection；

131, hopper side walls；

132, duct is filled the water；

14, lower contact；

15, circular passage；

16, supporting block；

161, arc surface；

2, packer；

3, ball sealer；

4, sucker rod；

7, tail pipe；

8, oil pipe；

9, pit shaft；

91, water layer；

92, oil reservoir.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In addition to non-individual defines the direction pointed out, the upper and lower equal directions being referred to herein are with the utility model Shown in subject to upper and lower equal directions in Fig. 1, illustrate in this together.

As shown in Figure 1, Figure 2 and Figure 3, the utility model proposes a kind of flowing well flood suction tubing string 100, including upper end by The injector 1 that oil pipe 8 connects, 1 lower end of injector are connected with packer 2,2 bottom end union tail 7 of packer by oil pipe 8；Institute Packer 2 is stated to set in pit shaft 9 and insulate top aqueous layer 91 and bottom oil layer 92；One is connected to sucker rod by being screwed The inside top of injector 1 is arranged in the ball sealer 3 of 4 bottom ends；During the injector 1 includes outer tube 11, inner tube 12 and has The top connection 13 and lower contact 14 of heart through-hole, 13 external wall of upper portion of top connection connects the oil pipe 8 of 1 upper end of injector, under top connection 13 Portion's outer wall connects 11 top of outer tube, and 13 lower inner wall of top connection connects 12 top of inner tube；The connection water filling of 14 lower part outer wall of lower contact The oil pipe 8 of 1 lower end of device, 14 external wall of upper portion of lower contact connect 11 bottom of outer tube, and 14 upper inside wall of lower contact connects 12 bottom of inner tube； Circular passage 15 is formed between inner tube 12 and outer tube 11, outer tube 11 is equipped with the inlet opening 111 of multiple perforation tube walls, in this implementation In mode, there are four the settings of inlet opening 111；13 inner cavity of top connection is funnel-shaped；It is circumferentially evenly equipped in hopper side walls 131 more A supporting block 16, in the present embodiment, there are four the settings of supporting block 16, and supporting block 16 has certain thickness, two branch Hopper side walls 131 between bracer 16 constitute through-flow runner, and through-flow runner is connected to the centre bore of inner tube 12；Four supporting blocks 16 The ball seat that can set ball sealer 3 is constituted, the surface that ball seat is contacted with ball sealer is in arc surface 161；Water filling is equipped in top connection 13 Duct 132, the quantity that water filling duct 132 is arranged in top connection 13 are identical as the quantity of supporting block 16；Fill the water 132 lower end of duct to Lower connection circular passage 15, water filling 132 upper end of duct upwardly penetrates through supporting block 16 and water filling 132 upper port of duct is located at arc surface In 161.In the present embodiment, injector 1 is connect with the oil pipe 8 of its upper and lower end using being screwed, packer 2 and oil pipe 8 It is also using the connection that is screwed with tail pipe 7；The top connection, lower contact and inner and outer tubes are also using the company of being screwed It connects.

The working principle of the utility model flowing well flood suction tubing string is: after in tubing string tripping in pit shaft 9, set packer 2, top aqueous layer 91 and bottom oil layer 92 are insulated, ball sealer 3 is located to the ball seat on 1 inside top of injector by sucker rod 4 Go up and seal water filling duct 132, at this time the production fluid of bottom oil layer 92 from bottom to top successively by 12 centre bore of injector inner tube, Through-flow runner enters the oil pipe 8 of injector upper end, and then flows to surface line, and the water of water layer 91 is due to filling the water duct 132 It is sealed by ball sealer 3 and cannot be introduced into bottom oil layer 92.When oil well stop-spraying needs to fill the water, by above mentioning sucker rod 4 in well head So that ball sealer 3 is separated from 1 top ball seat of injector, the water filling duct 132 of injector 1 is opened at this time, and upper water successively passes through Inlet opening 111, circular passage 15 and the water filling duct 132 of injector 1, and injector is come downwards to by 12 centre bore of injector inner tube 1 lower end oil pipe 8, and then enter oil reservoir 92 and realize water filling.After stopping water filling and stewing well replacement completion, sucker rod 4 and sealing are transferred Normal self-spray production can be realized in the water filling duct 132 that ball 3 blocks the top ball seat of injector 1 again.

In water filling stage or production phase, sand and mechanical admixture in tubing string in liquid can be along under through-flow runners when settling Row, ball sealer, ball seat are in vacant state for through-flow runner and the conical surface of injector top connection 13, therefore can have Effect avoids ball sealer and ball seat from being buried by sand and lead to mechanical breakdown；Unlatching and closing for injector water filling duct is taken out by lifting The mechanical forced opening/shutting mode of beam hanger is realized, the success rate unlatched and closed greatly improved.

The beneficial effect of the utility model flowing well flood suction tubing string is: (1) using mechanical forced opening/shutting mode, improve Water filling duct unlatches and closes success rate；(2) design of string pipe, which has, to have sands-proof check and antiscale card energy with the through-flow runner of sand setting Power, to improve the stability of tubing string.

Further, in the present embodiment, the top connection 13, lower contact 14 and outer tube 11 and inner tube 12 can be integrally formed It is made.Supporting block 16 in hopper side walls (that is: the conical surface) 131 integrated with top connection can be processed into.

The above descriptions are merely exemplary embodiments of the present utility model, the model being not intended to limit the utility model It encloses.Any those skilled in the art, made equivalent change under the premise of not departing from the conceptions and principles of the utility model Change and modify, should belong to the range of the utility model protection.

Claims (6)

1. a kind of flowing well flood suction tubing string, which is characterized in that including the injector that upper end is connected by oil pipe, injector lower end Packer, packer bottom end union tail are connected with by oil pipe；The packer setting is in pit shaft and insulates top aqueous layer And bottom oil layer；The top of injector is arranged in one ball sealer for being connected to sucker rod bottom end；The injector include outer tube, Inner tube and top connection and lower contact with central through hole, top connection lower part outer wall connect at the top of outer tube, top connection lower inner wall It connects at the top of inner tube；Lower contact external wall of upper portion connects outer pipe bottom, and lower contact upper inside wall connects bottom of inner tube；Inner tube and outer tube Between form circular passage, outer tube is equipped with the inlet openings of multiple perforation tube walls, and top connection inner cavity is funnel-shaped；In hopper side walls Multiple supporting blocks are circumferentially evenly equipped with, multiple supporting blocks constitute the ball seat that can set ball sealer, the surface that ball seat is contacted with ball sealer In arc surface；Water filling duct is equipped in top connection, water filling duct lower end is connected to downwards circular passage, and water filling duct upper end is worn upwards Overdraw bracer and water filling duct upper port be located in arc surface.

2. flowing well flood suction tubing string as described in claim 1, which is characterized in that the top connection, lower contact and outer tube It is made into integration with inner tube.

3. flowing well flood suction tubing string as described in claim 1, which is characterized in that supporting block have certain thickness, two Hopper side walls between supporting block constitute through-flow runner.

4. flowing well flood suction tubing string as described in claim 1, which is characterized in that the supporting block is arranged four.

5. flowing well flood suction tubing string as described in claim 1, which is characterized in that the inlet opening is arranged four.

6. flowing well flood suction tubing string as described in claim 1, which is characterized in that top connection external wall of upper portion connects injector The oil pipe of upper end, lower contact lower part outer wall connect the oil pipe of injector lower end.