CN206668234U - A kind of ball-throwing type selective sand control process pipe string - Google Patents

Abstract

The utility model provides a kind of ball-throwing type selective sand control process pipe string, including sand control outer tube and the sand control inner tube for being placed in sand control outer tube, the sand control outer tube include be sequentially connected from top to bottom top hanging setting mechanism, anti-flushing well device, outer device for filling, screen casing, plug, the sand control inner tube includes releasing gadget, interior device for filling, switching mechanism, the bottom positioner being sequentially connected from top to bottom, the quantity that the interior device for filling is set is consistent with the outer device for filling positioned at each oil reservoir, and diametrically mutually corresponding；The interior device for filling installs interior flushing valve between any two；The utility model can both realize that one-trip string completed the selective sand control construction of multiple zone well, it is ensured that the independence between each layer, give full play to each substratum production capacity, reach optimal sand control production effect.

Description

A kind of ball-throwing type selective sand control process pipe string

Technical field

Downhole petroleum mining operations tubing string is the utility model is related to, especially a kind of ball-throwing type selective sand control process pipe string.

Background technology

The more thin heavy oils of loose sand are with oil is thick, layer is more, interlayer span is big, anisotropism is strong, permeability is relatively low The features such as, sand-preventing process enforcement difficulty is big, and general sand control is difficult to the yield heterosis for giving full play to long well section exploitation, it is impossible to is directed to Property to whole stratum carry out segmentation difference transformation and sand control construct.Current selective sand control technique can be real compared with general sand control Existing one-trip string completes the segmentation sand control of multiple intervals, and between ensuring each section independently of each other, but it changes layer construction needs activity Tubing string, interior tubing string is slided into construction location, bring larger inconvenience and security risk；To ensure position after interior tubing string slip Accurately, need on inner and outer pipes post Design Orientation instruction device so as to well head judge, but multilayer construction in, due to the increasing of positioner More, often signal designation is chaotic, makes workmen be difficult to judge, therefore original separate-layer string has complex operation, construction risk Greatly, the problems such as low construction efficiency.

By retrieval, open (bulletin) number 104775802A is open to disclose thermal production well point (bulletin) day 2015-07-15 Sand control pipe and its anti-sand method are split in lamination, belong to the sand control technique field in oil field development.Tubing string includes sand control outer tube and technique Two layers of tubing string of inner tube, sand control outer tube include the outer instrument of top packer, back washing device, pressure break sealing tool, frac-pack, unidirectional Sealing tool, screen casing, external position device, Inter-zonal packing device and plug；Technique inner tube include releasing tool, frac packs, Sliding sleeve switch, positioning instrument and frac-pack conversion equipment.Its sand control step is：Set top packer；Give up；Setting interlayer Packer；Technique inner tube is transferred, carries out the fracturing sand control filling construction of bottom perforated interval；Circulation canal is opened, is circulated Filling；Anti-flushing well；Technique inner tube is above put forward, other perforated intervals are carried out with frac-pack construction and flow pack is constructed.Due to making With instruments such as back washing device, frac-pack conversion equipments, have fixed tubular column anti-flushing well, without casing pressure pressure break and it is anti-return tell etc. it is excellent Gesture.

The utility model patent application content and thermal production well separate-layer fracturing sand control string main region disclosed in 2015-07-15 It is not：Disclosed process pipe string mainly use inside and outside two layers tubular column structure composition, its mode implemented using dragging inner tube by Under the supreme sand control construction for successively carrying out each layer, belong to the sand control method of the movable internal pipe, " the utility model mentioned in the patent With fixed tubular column anti-flushing well " it is only a step reacting cycle well-flushing process in filling anti-sand technical process, conventional filling anti-sand Process mainly includes setting, give up, extruding, the process such as flow pack, anti-flushing well.Its specific implementation process is：Top is set to seal Every device；Give up；Above carry interior tubing string and set Inter-zonal packing device；Tubing string in technique is transferred, carries out the fracturing sand control of bottom perforated interval Filling construction；Circulation canal is opened, carries out flow pack；Anti-flushing well；Technique inner tube is above put forward, pressure break is carried out to other perforated intervals Filling construction and flow pack construction.Overall tubular column structure is complicated and implementing process is relatively complicated, and implement general plan is of a relatively high.

A kind of ball-throwing type selective sand control process pipe string is overall lower going-into-well after inside and outside tubing string is worked good in advance at well head In cylinder, reach no longer movable tubing string after design attitude, the stratum extruding for realizing each oil reservoir simply by the mode of pitching is filled Sand control construction is filled out, embodiment is running string, once sets isolating tool and the (difference of Inter-zonal packing instrument at the top of completion In patent searching), continue boosting and open filling mouth in lower floor (filling mouth position at well head in advance to connecting with outer), carry out The construction of lower floor squeeze pack, construction terminate rear fixed tubular column anti-flushing well (should in patent searching function phase with but embodiment have Difference：This patent is by No.1 backwash passage 4, liquid stream ALT-CH alternate channel 44, backwash wellhole 18, the upper strata screen casing 27 and wash-in on top Liquid flow hole A56 on well valve 54, and liquid flow hole B59 enter inside oil pipe, and unnecessary sand is washed out)；Lower floor's construction terminates (this Utility model is transformed into row flow pack without tubing string in carrying out and reduces construction risk, reduces operational procedure, it is ensured that applies Work safety)；(this patent is to realize to change layer construction by way of pitching to input steel ball 49, and patent searching is secondary above to put forward inner tube The existing complex procedures of the inside and outside filling cause for gossip of docking, well control equivalent risk be present), open and sliding sleeve is filled in upper strata, with outer filling mouth 25 Through in connected state)；Upper strata squeeze pack construction, construction terminate rear fixed tubular column anti-flushing well；After well-flushing terminates, give up, rise Go out inner tube and complete two layers of sand control construction.

The content of the invention

The purpose of this utility model is to provide a kind of ball-throwing type selective sand control process pipe string, can both realize that one-trip string is complete Selective sand control into multiple zone well is constructed, it is ensured that the independence between each layer, is given full play to each substratum production capacity, is reached optimal sand control Production effect；Meanwhile the tubing string simplifies working procedure, substantially increases efficiency of construction and construction by optimizing structure design Success rate, operating cost is reduced, extend the sand proof well life-span.

The purpose of this utility model can be achieved by the following technical measures：

The ball-throwing type selective sand control process pipe string, including sand control outer tube and the sand control inner tube for being placed in sand control outer tube, institute State sand control outer tube include be sequentially connected from top to bottom top hanging setting mechanism, anti-flushing well device, outer device for filling, screen casing, Plug, the outer device for filling and screen casing will at least set two groups as one group of unit, and two groups of units are set between any two There is Inter-zonal packing device, first group of unit is located at the first oil reservoir from top to bottom, and second unit is located at the second oil reservoir, by that analogy； The sand control inner tube includes releasing gadget, interior device for filling, switching mechanism, the bottom positioner being sequentially connected from top to bottom, The quantity that the interior device for filling is set is consistent with the outer device for filling positioned at each oil reservoir, and diametrically mutually corresponding；The What device for filling opened up that the outer device for filling filled in upper strata in corresponding first oil reservoir of mouth opens up in the upper strata in one oil reservoir outer fills Fill out mouth, the outer device for filling that device for filling is also opened up in corresponding second oil reservoir of filling mouth in the lower floor in the second oil reservoir opens up outer Mouth is filled, device for filling installs interior flushing valve between any two in the lower floor；Set and set inside the interior device for filling lower end Sliding block opening device；The top hanging setting mechanism upper end is connected in the back-off sub of releasing gadget.

The purpose of this utility model can be also achieved by the following technical measures：

The top hanging setting mechanism includes hanging head, fixing device, support tube, sealing slips, top packing element, work Plug, the hanging head are provided with No.1 backwash passage, can seal slip sleeve outside support tube as the liquid stream through hole of backwash, Sealing slips upper and lower ends are connected device by connecting pin, and fixing device top and the hanging head of upper end pass through screw thread Connection, the fixing device bottom of lower end set baffle ring, and the top packing element, piston are also enclosed on the outside of support tube, the top glue Cylinder upper end is baffle ring, and lower end connects piston, and the support tube is provided with and sets passage.

The hanging head is provided with anti-rotation pin and is fixed in the back-off sub of releasing gadget, and hanging head is provided with and pulls off pin It is fixed on fishing socket.

The piston is provided with cutting pin and is fixed on anti-flushing well device.

The anti-flushing well device includes connector, pressure cap, spring, and connector is provided with backwash wellhole, connector outer sheath There is the pressure cap for blocking backwash wellhole, pressure cap bottom sets spring, and lower spring end is connected on baffle ring, and baffle ring is socketed in connection On part, connector upper end connects the support tube, and connector lower end is connected on the joint of outer device for filling upper end.

Back-off sub that the releasing gadget includes being sequentially connected from top to bottom, connecting tube, lane device is set, it is described to set Lane device is provided with the liquid stream ALT-CH alternate channel of axial direction and radial direction sets passage, it is described set lane device set passage and branch The passage that sets on stay tube communicates, described to set device for filling in the connection of lane device lower end；Back-off sub using left-hand thread form with The hanging head of hanging setting mechanism is connected, and realizes that rotating forward is given up function.

The outer device for filling includes outer device for filling body, shutoff device, and the outer device for filling body opens up radially Outer filling mouth, the outer device for filling body interior is set with a sliding sleeve, and the sliding sleeve is closes the shutoff device of outer filling mouth.

Device for filling includes interior device for filling body, delaminating units slide block device, institute in upper strata in first oil reservoir State interior device for filling body and interior filling is connected to by pin and filled provided with mouth, the delaminating units slide block device is filled in upper strata Put temporarily to block on body and mouth is filled in upper strata, the delaminating units slide block device center cavity upper port is opened up into for accepting The conical opening of steel ball, delaminating units slide block device is realized with steel ball mating reaction and under hydraulic action fills opening for mouth in upper strata Open.

Device for filling body lower end passes sequentially through interior device for filling joint in upper strata in first oil reservoir, conversion connects Head, washing pipe joint, washing pipe are connected with interior flushing valve upper end, in the interior device for filling upper end connection in the second oil reservoir under flushing valve End.

Sliding sleeve is set in the lower floor that interior device for filling in second oil reservoir opens up by shear pin installation at filling mouth to open Opening device, the sliding sleeve opening device that sets is a plug, is on the one hand blocked completely in the interior device for filling in the second oil reservoir Center cavity, on the other hand partly block and mouth is filled in the lower floor that the interior device for filling in the second oil reservoir of radial direction opens up.

Interior device for filling lower end connection bearing device in the oil reservoir that one layer of bottommost, the bearing device is also a plug, Center cavity in the interior device for filling in the oil reservoir of one layer of bottommost is blocked completely.

The interior flushing valve includes connection body, fixed component, sliding block, and the connection body, fixed component are tubulose Body, the connection body are enclosed on the outside of fixed component and form annular space between the two, and sliding block is set in the annular space, described to connect this Body and fixed component open up the liquid flow hole of radial direction, connect the liquid flow hole on body higher than the liquid flow hole in fixed component, described Well-flushing valve spring in slider bottom setting, interior well-flushing valve spring bottom is connected to spring catch and put.

The Inter-zonal packing device includes connector, seal support part, extrusion, bottom packing element, and the extrusion is set Outside seal support part, extrusion upper end is connected with connector, and bottom packing element upper surface, the Inter-zonal packing are withstood in lower end Device upper end is connected by connector with top tubing round thread, and its lower end is threadedly coupled by joint with device for filling outside lower floor.

The switching mechanism includes beam pawl, switching mechanism body, and the beam pawl upper end is connected to switching mechanism body outer wall On, the switching mechanism is connected by switching mechanism body with top tubing round thread, and bottom passes through switching mechanism body and positioning Device is threadedly coupled.

The bottom positioner is connected by screw thread with switching mechanism body.

The utility model has the advantages that：

Sand control outer tube is arranged on the oil reservoir well section in sleeve pipe, sand control inner tube is arranged in sand control outer tube, is insulated at top Device upper end links together sand control outer tube and inner tube by releasing tool, and inside and outside bottom of the tube is by positioner by high pressure packing Device and interior device for filling are combined together in advance, formed one sealing filling unit, according to the number of plies how much, install corresponding number Sealing unit, each layer opened during Specific construction by the way of pitching be step by step located to fill on interior device for filling and slide Set, the squeeze pack sand control construction on each substratum stratum is realized, after construction terminates, filling tubing string, high pressure packing is filled in upper proposition Put, screen casing etc. stays and sand-blocking function can be achieved in the wellbore.The tubing string can once complete more than 2 layers of layering squeeze pack sand control Construction, realizes each substratum and effectively transforms, it is ensured that the equilibrium producing of multiple zone well.

The utility model advantage：

1st, tripping in design attitude after the completion of inside and outside tubing string is docked in advance using well head, opens each layer by way of pitching Filling construction, it is simple to operate, securely and reliably.

Compared with patent searching, patent searching puts inner tube mode and docks inside and outside filling mouth using above putting, after docking is accurate Each layer squeeze pack construction is being carried out, tubing string and tool construction are complicated, cumbersome, and risk is higher, are also based on the reason It has developed this fixed tubular column stuff slicing and filling sand control technique.

2nd, the utility model need to only carry out squeeze pack sand control construction to each substratum, by the operation side for controlling work progress Method realizes that annular pack is closely knit, reduces working procedure, avoids because extruding construction is brought with flow pack transfer process Risk.

3rd, the utility model is in implementation process, without dismounting well head, lower oil tube, it is ensured that high pressure formation sand control was constructed Journey well control safety caused by stratum energy abundance, more meets the requirement of safety and environmental protection.

4th, the utility model possesses fixed tubular column anti-flushing well function, after the function ensure that in work progress or construction terminates Larger difference be present with retrieval design in the sand card tubing string caused by backwash not in time, embodiments thereof.

5th, the utility model is devised with repeatable switching mechanism with open and close function is repeated, and can be achieved secondary heavy Multiple filling construction, disclosure satisfy that the more round steam injection sand proof well stop-off demands of thick oil thermal extraction.

In a word, (1) one-trip string can complete the layering extruding or pressure crack filling anti-sand construction of 2 layers of huge discharge.(2) use Stuff, filling construction step by step being carried out, effective transformation of each substratum can be realized without movable tubing string, constructing operation is simple, Securely and reliably.(3) anti-flushing well device realizes the quick anti-flushing well function of fixed tubular column, it is ensured that implementation process is safe and reliable.(4) Switching mechanism, which has, repeats open and close function, and secondary repetition filling construction can be achieved, disclosure satisfy that the more rounds of thick oil thermal extraction Steam injection sand proof well stop-off demand.

Brief description of the drawings

Fig. 1 is that a kind of ball-throwing type selective sand control process pipe string of the utility model simplifies structural representation；

It is anti-that Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11 are followed successively by the layering of the utility model ball-throwing type Sand process pipe string is segmented enlarged drawing from top to bottom.

In figure：Hanging setting mechanism 1, it is anti-rotation pin 2, hanging head 3, No.1 backwash passage 4, pull off pin 5, fishing socket 6, Fixing device 7, support tube 8, connecting pin 9, sealing slips 10, baffle ring 11, top packing element 12, piston 13, cutting pin 14, one Number set passage 15, anti-flushing well device 16, connector 17, backwash wellhole 18, pressure cap 19, spring 20, interstage sleeve 21, fill outside upper strata Device for filling 23 outside device joint 22, upper strata, outer device for filling body 24, mouth 25, shutoff device 26, upper sieve are filled outside upper strata Pipe 27, oil pipe 28, Inter-zonal packing device 29, connector 30, seal support part 31, extrusion 32, bottom packing element 33, fill outside lower floor Action joint 34, device for filling 35 outside lower floor, No. two backwash passages 36, tubing coupling 37, lower floor's screen casing 38, plug 39, loses Mobile phone structure 40, back-off sub 41, connecting tube 42, set lane device 43, liquid stream ALT-CH alternate channel 44, two sets passage 45, upper strata Interior device for filling 46, interior device for filling body 47, delaminating units slide block device 48, steel ball 49, mouth 50, interior filling are filled in upper strata Device joint 51, crossover sub 52, washing pipe joint 53, interior flushing valve 54, connection body 55, liquid flow hole 56, fixed component 57, cunning Block 58, liquid flow hole 59, interior well-flushing valve spring 60, set sliding sleeve opening device 61, device for filling 62, bearing device 63 in lower floor, Switching mechanism 64, beam pawl 65, switching mechanism body 66, bottom positioner 67.

Embodiment

Relevant detailed description of the present utility model and technology contents, coordinate brief description of the drawings as follows, but accompanying drawing only provides ginseng Examine and purposes of discussion, be not used for being any limitation as the utility model.

According to Fig. 1 and Fig. 2 to Figure 11, ball-throwing type selective sand control process pipe string, mainly there are sand control outer tube and sand control inner tube Two layers of tubing string, sand control outer tube is mainly by top hanging setting mechanism 1, anti-flushing well device 16, outer device for filling 23, upper strata screen casing 27th, Inter-zonal packing device 29 and plug 39 form；Interior tubing string mainly by releasing gadget 40, interior flushing valve 54, set sliding block open Device 56, switching mechanism 63, device for filling 46, delaminating units slide block device 47, steel ball 49 and bottom positioner 59 in upper strata Composition.In case of multiple layers of fillings can increase Inter-zonal packing device 29, outer device for filling 23, upper strata screen casing 27, interior flushing valve 54 Device for filling 46, delaminating units slide block device 48 (size changes) and (size of steel ball 49 in (starting differential pressure changes), upper strata Change).But the scale factors such as the operational discharge capacity to be reached in work progress are considered, so that it is determined that hierarchy number.

Top hanging setting mechanism 1 is by hanging head 3, fixing device 7, support tube 8, sealing slips 10, baffle ring 11, top glue Cylinder 12, piston 13 form.Wherein hanging head 3 is provided with No.1 backwash passage 4, can be set simultaneously as the liquid stream through hole of backwash Anti- rotation pin 2, pin 5 is pulled off, anti-rotation pin 2 is used to be connected with interior tubing string, pulls off pin 5 and is used to be connected with fishing socket 6.Even The top of adapter 42 is connected through a screw thread with hanging head 3, and its underpart is connected with sealing slips 10 by connecting pin 9.Support tube 8 Passage 15 is set provided with No.1.Piston 13, which is provided with, cuts pin 14.Top hanging setting mechanism 1 and Y445 sets suspension side Formula, to set principle consistent.

Anti-flushing well device 16 is made up of connector 17, pressure cap 19, spring 20 and baffle ring 21, which is provided with backwash wellhole 18. The upper end of anti-flushing well device 16 is threadedly coupled with top hanging setting mechanism 1 lower end, lower end and outer device for filling 23 by upper strata outside Device for filling joint 22 is threadedly coupled.

Device for filling 23 is made up of outer device for filling body 24 and shutoff device 26 outside upper strata, which is provided with outer filling mouth 25.The lower end of device for filling 23 is connected with oil pipe by joint screw thread outside upper strata.

Inter-zonal packing device 29 is made up of connector 30, seal support part 31, extrusion 32, bottom packing element 33.Interlayer seals It is threadedly coupled every the upper end of device 29 by connector 30 with top oil pipe 28, its lower end passes through device for filling 35 outside joint and lower floor Threaded connection.

Releasing gadget 40 is mainly made up of back-off sub 41, connecting tube 42 with setting lane device 43, will by connecting tube 42 Back-off sub 41 links together with setting lane device 43.Lane device 43 is set provided with liquid stream ALT-CH alternate channel 44 (4 uniform) And No. two set passage 45 (4 uniform), interior tubing string be in sealing state, oil pipe filling in the case where setting sliding block opening device 9 and acting on Setting passage 45 by No. two when liquid pressurizes can realize that top hanging setting mechanism 1 is set, and set principle and sat with Y445 packers It is similar to seal principle；The lower end of lane device 43 is set using tubing round thread connection with device for filling in upper strata 46 to be connected；Back-off sub 41 It is connected using left-hand thread form with the hanging head 3 of hanging setting mechanism 1, it is achievable to rotate forward function of giving up.

Device for filling 46 is made up of device for filling body 47 in upper strata and delaminating units slide block device 48 in upper strata.In upper strata Device for filling 46, which is provided with upper strata, fills mouth 50.Delaminating units slide block device 48 is connected to device for filling in upper strata by pin On body 47, delaminating units slide block device 48 can be achieved to fill mouth in upper strata with the mating reaction of steel ball 49 and under hydraulic action 50 unlatching.The lower end of device for filling 46 is connected by interior device for filling joint 51 with crossover sub 52 in upper strata.

Interior flushing valve 54 is made up of connection body 55, fixed component 57, sliding block 58.It which is provided with liquid flow hole 56 and liquid flow hole 59 and interior well-flushing valve spring 60.The interior upper and lower side of flushing valve 54 is threadedly coupled by joint with washing pipe.

The utility model by following operation sequence at the scene in use, carried out：

So that two layers of selective sand control is constructed as an example：A kind of ball-throwing type selective sand control process pipe string is connected by order illustrated, Design attitude is lowered into oil pipe, is pressurizeed from oil pipe liquid filling, disposably sets hanging setting mechanism 1 and Inter-zonal packing device 29, Continue to raise pressure, the pin set on sliding block opening device 56 is cut, device for filling in lower floor is filled mouth by slide block down Expose, inside and outside filling mouth is in opening, and will now take sand flow body and be pumped into by oil pipe can carry out lower floor's filling anti-sand and apply Work.Construction terminate after, be pumped into flushing fluid from sleeve pipe, by No.1 backwash passage 4, liquid stream ALT-CH alternate channel 44, backwash wellhole 18, on Liquid flow hole 51 and liquid flow hole 54 on the upper strata screen casing 27 and interior flushing valve 54 in portion enter inside oil pipe, and unnecessary sand is washed Go out, realize reacting cycle well-flushing function.After lower floor's anti-flushing well terminates, steel ball 49 is put into, delaminating units cunning is cut in the pressurization of oil pipe liquid filling The fixing pin of block assembly 48, sliding sleeve move down, and make to fill mouth 49 in upper strata and outer filling mouth 25 is in connected state, now Upper strata filling anti-sand construction is carried out, can be achieved anti-flushing well function after filling construction, well-flushing liquid is anti-by No.1 during anti-flushing well Wash passage 4, liquid stream ALT-CH alternate channel 44, filled in the outer filling mouth 25 of device for filling 23 and upper strata outside backwash wellhole 18 and upper strata Mouth 50 is filled in the upper strata of device 46 to enter inside oil pipe, establishes reacting cycle passage., will by rotating forward oil pipe after well-flushing terminates After anti-rotation pin 2 in back-off sub 41 is cut, oil pipe is above carried, sand control inner tube is risen, you can carries out next step construction.

This patent can also realize more than 2 layers slicing and filling sand control constructions, but the number of plies is more to slicing and filling operational discharge capacity etc. Scale has a certain impact, and such as needs multilayer to construct, repeat operation upper strata work progress, finally given up and rise central tube Construction.

Thermal production well separate-layer fracturing sand control string disclosed in the utility model patent application content and 2015-07-15 and its anti- The sand method main distinction is：Disclosed process pipe string mainly use inside and outside two layers tubular column structure composition, its mode implemented adopts The sand control for successively carrying out each layer from the bottom to top with dragging inner tube is constructed, and is belonged to the sand control method of movable internal pipe, is mentioned in the patent " the utility model has fixed tubular column anti-flushing well " be only a step reacting cycle well-flushing process in filling anti-sand technical process, often Advise the process of filling anti-sand and mainly include setting, give up, extruding, the process such as flow pack, anti-flushing well.Its specific implementation process For：Set top packer；Give up；Above carry interior tubing string and set Inter-zonal packing device；Tubing string in technique is transferred, carries out bottom perforated hole The fracturing sand control filling construction of section；Circulation canal is opened, carries out flow pack；Anti-flushing well；Technique inner tube is above put forward, to other perforations Well section carries out frac-pack construction and flow pack construction.Overall tubular column structure is complicated and implementing process is relatively complicated, implements wind Danger is of a relatively high.

A kind of ball-throwing type selective sand control process pipe string is overall lower going-into-well after inside and outside tubing string is worked good in advance at well head In cylinder, reach no longer movable tubing string after design attitude, the stratum extruding for realizing each oil reservoir simply by the mode of pitching is filled Sand control construction is filled out, embodiment is running string, once sets isolating tool and the (difference of Inter-zonal packing instrument at the top of completion In patent searching), continue boosting and open filling mouth in lower floor (filling mouth position at well head in advance to connecting with outer), carry out The construction of lower floor squeeze pack, construction terminate rear fixed tubular column anti-flushing well (should in patent searching function phase with but embodiment have Difference：This patent passes through No.1 backwash passage 4, liquid stream ALT-CH alternate channel 44, backwash wellhole 18, upper strata screen casing 27 and interior flushing valve 54 On liquid flow hole 56, and liquid flow hole 58 enters inside oil pipe, and unnecessary sand is washed out)；Lower floor's construction terminates (the utility model Being transformed into row flow pack without tubing string in carrying out reduces construction risk, reduces operational procedure, it is ensured that construction safety)； (this patent is to realize to change layer construction by way of pitching to input steel ball 49, and patent searching is above to carry inside and outside the secondary docking of inner tube Fill the existing complex procedures of cause for gossip, well control equivalent risk be present), open and sliding sleeve is filled in upper strata, the company of being in of mouth 25 is filled with outer Logical state)；Upper strata squeeze pack construction, construction terminate rear fixed tubular column anti-flushing well；After well-flushing terminates, give up, it is complete to act inner tube Constructed into two layers of sand control.

The utility model advantage：

1st, tripping in design attitude after the completion of inside and outside tubing string is docked in advance using well head, opens each layer by way of pitching Filling construction, it is simple to operate, securely and reliably.

Compared with patent searching, patent searching puts inner tube mode and docks inside and outside filling mouth using above putting, after docking is accurate Each layer squeeze pack construction is being carried out, tubing string and tool construction are complicated, cumbersome, and risk is higher, are also based on the reason It has developed this fixed tubular column stuff slicing and filling sand control technique.

2nd, the utility model need to only carry out squeeze pack sand control construction to each substratum, by the operation side for controlling work progress Method realizes that annular pack is closely knit, reduces working procedure, avoids because extruding construction is brought with flow pack transfer process Risk.

3rd, the utility model is in implementation process, without dismounting well head, lower oil tube, it is ensured that high pressure formation sand control was constructed Journey well control safety caused by stratum energy abundance, more meets the requirement of safety and environmental protection.

4th, the utility model possesses fixed tubular column anti-flushing well function, after the function ensure that in work progress or construction terminates Larger difference be present with retrieval design in the sand card tubing string caused by backwash not in time, embodiments thereof.

5th, the utility model is devised with repeatable switching mechanism with open and close function is repeated, and can be achieved secondary heavy Multiple filling construction, disclosure satisfy that the more round steam injection sand proof well stop-off demands of thick oil thermal extraction.

Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the scope of the claims of the present utility model, its He uses the equivalence changes of patent spirit of the present utility model, all should all belong to the scope of the claims of the present utility model.

Claims (15)

1. a kind of ball-throwing type selective sand control process pipe string, including sand control outer tube and the sand control inner tube for being placed in sand control outer tube, its Be characterised by, the sand control outer tube include be sequentially connected from top to bottom top hanging setting mechanism, anti-flushing well device, outer filling Device, screen casing, plug, the outer device for filling and screen casing will at least set two groups, and two groups of units two as one group of unit Inter-zonal packing device is provided between two, first group of unit is located at the first oil reservoir from top to bottom, and second unit is located at the second oil reservoir, By that analogy；The sand control inner tube include be sequentially connected from top to bottom releasing gadget, interior device for filling, switching mechanism, bottom Positioner, the quantity that the interior device for filling is set is consistent with the outer device for filling positioned at each oil reservoir, and diametrically phase It is mutually corresponding；Device for filling opens up the outer device for filling filled in upper strata in corresponding first oil reservoir of mouth and opened in upper strata in first oil reservoir If outer filling mouth, device for filling is also opened up outside the lower floor in corresponding second oil reservoir of lower floor's filling mouth in the lower floor in the second oil reservoir Mouth is filled outside the lower floor that device for filling opens up, the interior device for filling installs interior flushing valve between any two；The interior device for filling Set inside lower end and set sliding block opening device；The top hanging setting mechanism upper end is connected to the back-off sub of releasing gadget On.

2. a kind of ball-throwing type selective sand control process pipe string according to claim 1, it is characterised in that the top suspension is sat Sealing mechanism includes hanging head, fixing device, support tube, sealing slips, top packing element, piston, and the hanging head is provided with No.1 Backwash passage, slip sleeve can be sealed outside support tube as the liquid stream through hole of backwash, sealing slips upper and lower ends pass through company Pin follows closely the device that is connected, and fixing device top and the hanging head of upper end are connected through a screw thread, the fixing device bottom of lower end Baffle ring is set, and the top packing element, piston are also enclosed on the outside of support tube, and the top packing element upper end is baffle ring, and lower end connection is lived Plug, the support tube are provided with and set passage.

3. a kind of ball-throwing type selective sand control process pipe string according to claim 2, it is characterised in that the hanging head is set Anti- rotation pin is fixed in the back-off sub of releasing gadget, and hanging head, which is provided with, to be pulled off pin and be fixed on fishing socket.

4. a kind of ball-throwing type selective sand control process pipe string according to claim 2, it is characterised in that the piston is provided with Pin is cut to be fixed on anti-flushing well device.

A kind of 5. ball-throwing type selective sand control process pipe string according to claim 2, it is characterised in that the anti-flushing well device Including connector, pressure cap, spring, connector is provided with backwash wellhole, and connector outer sheath has the pressure for blocking backwash wellhole Cap, pressure cap bottom set spring, and lower spring end is connected on baffle ring, and baffle ring is socketed on connector, connector upper end connection institute Support tube is stated, connector lower end is connected on the joint of outer device for filling upper end.

A kind of 6. ball-throwing type selective sand control process pipe string according to claim 2, it is characterised in that the releasing gadget bag Include the back-off sub being sequentially connected from top to bottom, connecting tube, set lane device, the liquid stream for setting lane device and being provided with axial direction ALT-CH alternate channel and radial direction set passage, and the passage that sets for setting lane device communicates with the passage that sets on support tube, It is described to set device for filling in the connection of lane device lower end；Back-off sub uses the hanging head phase of left-hand thread form and hanging setting mechanism Even, realize that rotating forward is given up function.

A kind of 7. ball-throwing type selective sand control process pipe string according to claim 1, it is characterised in that the outer device for filling Including outer device for filling body, shutoff device, the outer device for filling body opens up the outer filling mouth of radial direction, the outer filling dress Put body interior and be set with a sliding sleeve, the sliding sleeve is the outer shutoff device for filling mouth of closing.

8. a kind of ball-throwing type selective sand control process pipe string according to claim 7, it is characterised in that in first oil reservoir Upper strata in device for filling include interior device for filling body, delaminating units slide block device, in the upper strata on device for filling body Provided with mouth is filled in upper strata, the delaminating units slide block device is connected on interior device for filling body by pin and temporarily blocked Mouth is filled in upper strata, the delaminating units slide block device center cavity upper port is opened up into for accepting the conical opening of steel ball, is layered Unit slide block device and steel ball mating reaction simultaneously realize the unlatching that mouth is filled in upper strata under hydraulic action.

9. a kind of ball-throwing type selective sand control process pipe string according to claim 8, it is characterised in that in first oil reservoir Interior device for filling body lower end pass sequentially through interior device for filling joint, crossover sub, washing pipe joint, on washing pipe and interior flushing valve End connects, flushing valve lower end in the connection of device for filling upper end in the lower floor in the second oil reservoir.

A kind of 10. ball-throwing type selective sand control process pipe string according to claim 7, it is characterised in that second oil reservoir In lower floor in fill in the lower floor that opens up of device for filling sliding sleeve opening device set by shear pin installation at mouth, it is described to set cunning Set opening device is a plug, on the one hand blocks in lower floor in the second oil reservoir center cavity, the opposing party in device for filling completely Face, which partly blocks, fills mouth in the lower floor that device for filling opens up in lower floor in the second oil reservoir of radial direction.

11. a kind of ball-throwing type selective sand control process pipe string according to claim 10, it is characterised in that one layer of bottommost Device for filling lower end connects bearing device in lower floor in oil reservoir, and the bearing device is also a plug, blocks bottommost completely Center cavity in device for filling in lower floor in one layer of oil reservoir.

A kind of 12. ball-throwing type selective sand control process pipe string according to claim 1, it is characterised in that the interior flushing valve Including connection body, fixed component, sliding block, the connection body, fixed component are tubular body, and the connection body is enclosed on solid Determine member outside and form annular space between the two, sliding block is set in the annular space, the connection body and fixed component open up footpath To liquid flow hole, connect the liquid flow hole on body higher than the liquid flow hole in fixed component, the slider bottom set in flushing valve Spring, interior well-flushing valve spring bottom are connected to spring catch and put.

A kind of 13. ball-throwing type selective sand control process pipe string according to claim 1, it is characterised in that the Inter-zonal packing Device includes connector, seal support part, extrusion, bottom packing element, and the extrusion is arranged on outside seal support part, extrudes Part upper end is connected with connector, and bottom packing element upper surface is withstood in lower end, the Inter-zonal packing device upper end by connector with Top tubing round thread connection, lower end is threadedly coupled by joint with device for filling outside lower floor.

A kind of 14. ball-throwing type selective sand control process pipe string according to claim 1, it is characterised in that the switching mechanism Including beam pawl, switching mechanism body, the beam pawl upper end is connected on switching mechanism body outer wall, and the switching mechanism is by opening Shutting mechanism body is connected with top tubing round thread, and bottom is threadedly coupled by switching mechanism body with positioner.

A kind of 15. ball-throwing type selective sand control process pipe string according to claim 1, it is characterised in that the bottom positioning Device is connected by screw thread with switching mechanism body.