CN209385106U - Pressure-guiding sand blower and double envelope single deck tape-recorder fracturing strings - Google Patents

Pressure-guiding sand blower and double envelope single deck tape-recorder fracturing strings Download PDF

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Publication number
CN209385106U
CN209385106U CN201821831891.5U CN201821831891U CN209385106U CN 209385106 U CN209385106 U CN 209385106U CN 201821831891 U CN201821831891 U CN 201821831891U CN 209385106 U CN209385106 U CN 209385106U
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China
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pressure
nozzle
main body
sand
runner
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CN201821831891.5U
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Chinese (zh)
Inventor
赵明琨
刘晓辉
王小军
任泽
张怀智
桑曙东
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HOLDING ENERGY PETROLEUM ENGINEERING (BEIJING) Co Ltd
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HOLDING ENERGY PETROLEUM ENGINEERING (BEIJING) Co Ltd
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Abstract

The utility model provides a kind of pressure-guiding sand blower and double envelope single deck tape-recorder fracturing strings, pressure-guiding sand blower includes main body and orifice union, wherein, main body is in the hollow columnar of both ends open, the side wall of main body be equipped with axially through pressure guide hole and the radial sand jet outlet that penetrates through, what the upper end of main body can be removably mounted is connected with top connection;Orifice union includes nozzle and setting ball, nozzle is set in top connection, top connection, nozzle and main body successively seal and are connected to form pressure break channel, honeycomb duct is formed between the outer peripheral surface of nozzle and the inner surface of top connection, the entrance of nozzle is stitched equipped with a plurality of filter sand, filter sand seam, honeycomb duct and pressure guide hole are sequentially communicated to form pilot channel, and setting ball has the first operating position of the lower part for blocking nozzle and abuts the second operating position of plug across nozzle.Double envelope single deck tape-recorder fracturing strings of the utility model have above-mentioned pressure-guiding sand blower.The pressure-guiding sand blower of the utility model, which can be avoided chock pressure difference, to be changed, so that packer is smoothly set.

Description

Pressure-guiding sand blower and double envelope single deck tape-recorder fracturing strings
Technical field
The utility model relates to underground fracture technical field of tools, in particular to a kind of pressure-guiding sand blower and have the pilot Double envelope single deck tape-recorder fracturing strings of sanding machine.
Background technique
Oil exploitation abnormal high temperature high pressure low porosity and low permeability reservoir, well type, for main producing well, are thrown with high angle hole, horizontal well Antenatal to carry out staged fracturing, casing cementing is generally mechanical staged fracturing, and this pressure break mode can be raising reservoir The injection rate of flow conductivity, increase exploitation well yield or injection well is made that contribution.
At the scene in construction, it often will appear due to that can not be set every device, lead to not continue to construct.It traces it to its cause main It is that sanding machine restriction is supported agent mill greatly, causes chock pressure difference to become smaller, set packer can not.
Utility model content
One purpose of the utility model is to provide a kind of pressure-guiding sand blower that can be avoided and chock pressure difference variation occur.
A kind of in order to achieve the above object, the utility model provides pressure-guiding sand blower comprising:
Main body, is in the hollow columnar of both ends open, the side wall of the main body be equipped with axially through pressure guide hole and diameter To the sand jet outlet of perforation, and the sand jet outlet is not connected to mutually with the pressure guide hole, and what the upper end of the main body can be removably mounted is connected with The lower end of top connection, the main body is connected with plug;
Orifice union comprising nozzle and setting ball, the nozzle are set in the top connection, the top connection, institute It states nozzle and is successively sealed with the main body and be connected to form pressure break channel, the inner surface of the outer peripheral surface of the nozzle and the top connection Between be formed with honeycomb duct, the entrance of the nozzle is stitched equipped with a plurality of filter sand, the filter sand seam, the honeycomb duct and the pilot Hole is sequentially communicated to form pilot channel, and the setting ball has the first operating position of the lower part for blocking the nozzle and passes through The nozzle abuts the second operating position of the plug.
Pressure-guiding sand blower as described above, wherein the nozzle includes the upper runner for from top to bottom setting gradually and being connected to And lower flow channel, the upper runner are in isometrical shape in necking down shape tapered from top to bottom, the lower flow channel, the filter sand, which seams, to be placed in On the side wall of the upper runner, the outer diameter of the setting ball is less than the upper-end inner diameter of the upper runner, and the setting ball is outer Diameter is greater than the internal diameter of the lower flow channel.
Pressure-guiding sand blower as described above, wherein the sandblasting hole radially penetrated through is additionally provided on the side wall of the main body.
Pressure-guiding sand blower as described above, wherein the nozzle is carboloy nozzle.
Pressure-guiding sand blower as described above, wherein the upper end outer peripheral surface of the main body is equipped with annular groove, the lower end of the nozzle Outer peripheral surface passes through the card of the annular ridge and the annular groove circumferentially arranged with the annular ridge that can be engaged by clamping with the annular groove Cooperation is connect, the nozzle connects with the main body.
Pressure-guiding sand blower as described above, wherein the inner surface of the top connection is radially equipped with baffle ring, the baffle ring Internal diameter is less than the inlet diameter of the nozzle, and the upper surface of the nozzle is abutted with the lower end surface of the baffle ring.
Another purpose of the utility model is to provide a kind of double envelope single deck tape-recorder fracturing strings with above-mentioned pressure-guiding sand blower.
A kind of double in order to achieve the above object, the utility model provides envelope single deck tape-recorder fracturing strings, include at least by up to Under sequentially connected upper packer, above-mentioned pressure-guiding sand blower, lower packet and starting taper.
Envelope single deck tape-recorder fracturing strings as described above double, wherein the lower packet includes:
Central tube is arranged with packing element thereon, and the both ends of the packing element are arranged with connecting cylinder and lower connecting cylinder respectively, described The lower part of lower connecting cylinder is connect with the basepipe seal, and the lower connecting cylinder can be mobile relative to the central tube, it is described on It is equipped with protection between connecting cylinder and the packing element and between the lower connecting cylinder and the packing element to rise ring, two protections are risen The end face of ring toward each other is respectively equipped with multiple grooves;
Set component comprising the connector being set on the central tube, the lower end of the connector and the upper company Connect cylinder is tightly connected, and the top of the connector connected by shear pin with the central tube, and the connector with it is described There is annular space between central tube, the central tube is equipped with the liquid injection port that is connected with the annular space, in the annular space by up to Under be successively arranged dummy piston and set connector, the dummy piston can be mobile relative to the central tube, the dummy piston Bottom surface, which is equipped with, is located in the connector and the retaining ring set between connector, and the top of the retaining ring is equipped with solution sealing of hole, institute State set connector be equipped with deblocking runner and axially through set runner, the bottom end for setting runner is equipped with ball-and-seat, institute It states liquid injection port, the annular space and the ball-and-seat and is sequentially communicated to be formed and set channel, the lower end of the deblocking runner and the ring The upper end of Kongxiang connection, the deblocking runner is abutted with the retaining ring, and the runner that unseals can be by the connector that sets It moves up and is connected to form deblocking channel with the solution sealing of hole.
Double envelope single deck tape-recorder fracturing strings as described above, wherein the protection rises by ring to protect the ring that rises made of spring steel.
Envelope single deck tape-recorder fracturing strings as described above double, wherein double envelope single deck tape-recorder fracturing strings further include be connected to it is described The hydraulic anchor of upper packer upper end and the safety joint for being connected to the hydraulic anchor upper end.
Compared with prior art, as follows the advantages of the utility model:
Pressure-guiding sand blower provided by the utility model blocks nozzle by investment setting ball, generates restriction effect to shape At pressure difference, be not in because restriction is supported the problem of agent mill causes chock pressure difference to become smaller greatly, also, after intensified pressure, Setting ball can pass through nozzle and enter main body, will not influence pressing crack construction, in addition, plug can play barrier effect to setting ball, It can be avoided the packer that setting ball enters pressure-guiding sand blower lower part, lead to can not sitting for the packer of pressure-guiding sand blower lower part Envelope, ensures that the packer for being connected to pressure-guiding sand blower upper and lower ends can smoothly be set after building the pressure.
Double envelope single deck tape-recorder fracturing strings provided by the utility model have the advantage that
(1), fractured layer number of segment is unrestricted, can complete the pressing crack construction of any multistage, improves construction efficiency, and reduction is applied Work cost;
(2), the optional any interval of pressure, controls each interval treatment scale, is transformed with strong points;
(3), have the function of backwash to squeeze, it can be achieved that owing to measure to replace, since the amount of owing replaces crowded construction can be in casing clamp away from interior remaining big The fracturing sand of amount, and double envelope single deck tape-recorder fracturing strings of the utility model have the function of backwash, can carry out after pressing crack construction anti- Sand washing is recycled, card is rinsed well away from interior sand setting, guarantees that lower step construction is gone on smoothly;
(4), the composed structure of double envelope single deck tape-recorder fracturing strings is simple, and tool external diameter is small, length is short, in inclination section handling capacity By force, and design has reliable anti-sticking, back off structure, highly-safe.
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 is the structural schematic diagram of the pressure-guiding sand blower of the utility model;
Fig. 2 is the portion A enlarged structure schematic diagram in Fig. 1;
Fig. 3 is the structural schematic diagram of double envelope single deck tape-recorder fracturing strings of the utility model;
Fig. 4 is the structural schematic diagram of lower packet in double envelope single deck tape-recorder fracturing strings shown in Fig. 3;
Fig. 5 is the portion B enlarged structure schematic diagram in Fig. 4;
Fig. 6 is the portion C enlarged structure schematic diagram in Fig. 4.
Drawing reference numeral explanation:
10, oil pipe;
20, casing;
30, safety joint;
40, hydraulic anchor;
50, upper packer;
60, pressure-guiding sand blower;
61, main body;611, pressure guide hole;612, sand jet outlet;613, sandblasting hole;614, annular groove;62, top connection;621, it keeps off Ring;63, plug;64, nozzle;641, upper runner;6411, filter sand stitches;642, lower flow channel;643, annular ridge;65, lower contact;
70, lower packet;
71, central tube;711, liquid injection port;72, packing element;73, upper connecting cylinder;74, lower connecting cylinder;75, the ring that rises is protected;751, Groove;76, component is set;761, connector;762, shear pin;763, dummy piston;7631, retaining ring;76311, it unseals Hole;764, connector is set;7641, runner is unsealed;7642, runner is set;765, ball-and-seat;77, annular space;78, the first connector; 79, the second connector;
80, starting taper.
Specific embodiment
In order to have clearer understanding to the technical solution of the utility model, purpose and effect, now in conjunction with Detailed description of the invention sheet The specific embodiment of utility model.
As depicted in figs. 1 and 2, the utility model provides a kind of pressure-guiding sand blower 60 comprising main body 61 and throttling group Part, wherein main body 61 is in the hollow columnar of both ends open, the side wall of main body 61 be equipped with axially through pressure guide hole 611 and diameter To the sand jet outlet 612 of perforation, and sand jet outlet 612 is not connected to mutually with pressure guide hole 611, i.e. the inside stream of pressure guide hole 611 and main body 61 Road is arranged in parallel, and what the upper end of main body 61 can be removably mounted is connected with top connection 62, specifically, the upper end outer peripheral surface of main body 61 is equipped with outer The lower inner surface of screw thread, top connection 62 is equipped with internal screw thread, by internal screw thread and the externally threaded cooperation that is screwed on, top connection 62 and master Body 61 connects, and certainly, top connection 62 can also be connected by pin with main body 61, in addition, in order to improve sealing performance, in main body It is additionally provided with O-ring seal between 61 and top connection 62, avoids fracturing fluid by main body 61 and top connection 62 by O-ring seal Junction leakage, the lower end of main body 61 are connected with plug 63, specifically, plug 63 is connected by fastening screw with main body 61, The lower end that main body 61 is blocked by plug 63, makes fracturing fluid that can not continue to flow downward via the runner inside main body 61, can only Main body 61 is flowed out via sand jet outlet 612 or pressure guide hole 611;Orifice union includes nozzle 64 and setting ball (not shown), Nozzle 64 is set in top connection 62, and top connection 62, nozzle 64 and main body 61 successively seal to be connected to form pressure break channel, due to master The lower end of body 61 is blocked by plug 63, so that the entrance in pressure break channel is the entrance of top connection 62, is exported as sand jet outlet 612, is taken The fracturing fluid of sand can be entered in main body 61 by top connection 62 and nozzle 64, and be pressed via sand jet outlet 612 into target zone Construction is split, honeycomb duct (not shown) is formed between the outer peripheral surface of nozzle 64 and the inner surface of top connection 62, nozzle 64 Entrance is equipped with a plurality of filter sand seam 6411, and filter sand seam 6411 is laser slotted, and a plurality of filter sand seam 6411 is along the circumferentially-spaced of nozzle 64 Setting, filter sand seam 6411 can filter out the gravel in fracturing fluid, and filter sand seam 6411, honeycomb duct and pressure guide hole 611 are sequentially communicated Form pilot channel, the entrance in pilot channel is nozzle 64, and 61 lower end, is stitched via filter sand based on the outlet in pilot channel 6411 filtered pressure fluids can be entered by pilot channel to be connected in the packer of 60 lower part of pressure-guiding sand blower, so that should Packer setting, setting ball are made of engineering plastics, setting ball have block nozzle 64 lower part the first operating position with And the second operating position of plug 63 is abutted across nozzle 64, specifically, can be blocked when setting ball is located at the first operating position Pressure break channel can be connected to the packer setting on the top of pressure-guiding sand blower 60 to form pressure difference after building the pressure, same with this When, it can be entered by pilot channel after pilot channel, fracturing fluid will not being blocked to filter via filter sand seam 6411 due to setting ball It is connected to the packer of the lower part of pressure-guiding sand blower 60, makes the packer setting, i.e., energy when setting ball is located at the first operating position Enough so that pressure-guiding sand blower 60 forms chock pressure difference, so that being connected to the packer of 60 upper and lower ends of pressure-guiding sand blower simultaneously Set, also, setting ball and nozzle 64 cooperatively form chock pressure difference by way of, be not in because restriction is supported agent The problem of mill causes chock pressure difference to become smaller greatly improves pressure when carrying out pressing crack construction, so that setting ball enters across nozzle 64 It in main body 61, and is placed in main body 61 under the barrier effect of plug 63, so that pressure break channel is opened, i.e. setting ball is located at the Two operating positions, at this point, fracturing fluid can smoothly pass over pressure break channel and spray via sand jet outlet 612, so that pressing crack construction It can smoothly carry out.
Pressure-guiding sand blower 60 provided by the utility model, by investment setting ball block nozzle 64, generate restriction effect from And pressure difference is formed, it is not in because restriction is supported the problem of agent mill causes chock pressure difference to become smaller greatly, also, in intensified pressure Afterwards, setting ball can pass through nozzle 64 into main body 61, will not influence pressing crack construction, in addition, plug 63 can play setting ball Barrier effect can be avoided the packer that setting ball enters 60 lower part of pressure-guiding sand blower, lead to the envelope of 60 lower part of pressure-guiding sand blower Every can not setting for device, ensure that the packer for being connected to 60 upper and lower ends of pressure-guiding sand blower can smoothly be sat after building the pressure Envelope.
Further, as shown in Fig. 2, nozzle 64 includes the upper runner 641 for from top to bottom setting gradually and being connected to and lower flow channel 642, for upper runner 641 in necking down shape tapered from top to bottom, lower flow channel 642 is in isometrical shape, and filter sand seam 6411 is set to upper runner On 641 side wall, it is preferred that filter sand seam 6411 is less than upstream along the equally circumferentially spaced of upper runner 641, the outer diameter of setting ball The upper-end inner diameter in road 641, and the outer diameter of setting ball is greater than the internal diameter of lower flow channel 642, specifically, the outer diameter of setting ball is 35mm, The internal diameter of lower flow channel 642 is 32mm, i.e. the internal diameter of lower flow channel 642 is more smaller than the outer diameter of setting ball, so that setting ball can either Lower flow channel 642 is blocked, and can enter in main body 61 after improving pressure across lower flow channel 642 and be abutted with plug 63, to make The operating position by changing setting ball is obtained, the throttling of pressure-guiding sand blower 60 can be realized and form pressure difference set packer or progress Pressing crack construction operation.
Certainly, the inner flow passage of nozzle 64 can also only need the lower end of nozzle 64 in necking down shape tapered from top to bottom Internal diameter is less than the outer diameter of setting ball.
Further, in order to avoid the fracturing fluid flow velocity for taking sand is too fast, lead to side wall erosive wear of the gravel to main body 61, As shown in Figure 1, being additionally provided with the sandblasting hole 613 radially penetrated through on the side wall of main body 61, the fracturing fluid for taking sand flows through sandblasting hole 613 When position, cross-sectional area increases, and in the case where pressure is constant, flow velocity can be reduced, to reduce gravel to the side of main body 61 The erosive wear of wall, and then extend the service life of main body 61.
Further, nozzle 64 is carboloy nozzle 64, and cemented carbide material has good wearability, can be for a long time The erosion for resisting fracturing sand, to ensure that the service life of nozzle 64, it is preferred that nozzle 64 uses YG8 or YT15 material.
Further, as shown in Fig. 2, the upper end outer peripheral surface of main body 61 is equipped with annular groove 614, the lower end periphery face of nozzle 64 is along week To the annular ridge 643 that can be engaged by clamping with annular groove 614 is equipped with, pass through the clamping engagement of annular ridge 643 and annular groove 614, spray Mouth 64 connects with main body 61, it should be noted that between the end face of annular ridge 643 and the bottom surface of annular groove 614 should there are even The gap of logical pressure guide hole 611, so that honeycomb duct is connected by gap with pressure guide hole 611, the mode of clamping engagement is simple and convenient, In addition, O-ring seal is arranged between annular ridge 643 and annular groove 614, passes through O-ring seal in order to improve sealing performance The junction of fracturing fluid autonomous agent 61 and nozzle 64 is avoided to leak.
It is of course also possible to which external screw thread is arranged in the upper end of main body 61, internal screw thread is set in the lower end of nozzle 64, passes through interior spiral shell Line and the externally threaded cooperation that is screwed on, main body 61 connect with nozzle 64, it should be noted that the such connection type of use, it need to be Through-hole for being connected to pressure guide hole 611 Yu honeycomb duct is set on the side wall of main body 61.Further, as shown in Fig. 2, top connection 62 Inner surface is radially equipped with baffle ring 621, and the internal diameter of baffle ring 621 is less than the inlet diameter of nozzle 64, the upper surface of nozzle 64 and gear The lower end surface of ring 621 abuts, i.e. the upper surface of nozzle 64 and the lower end surface of baffle ring 621 fits closely, so that in top connection 62 Fracturing fluid can fully enter nozzle 64, may not flow between the outer peripheral surface of nozzle 64 and the inner surface of top connection 62 and form water conservancy diversion In road, so that being to stitch 6411 filtered liquid via filter sand into the liquid in honeycomb duct, ensure that gravel will not Into in pilot runner, it ensure that the packer for being connected to 60 lower part of pressure-guiding sand blower can smoothly be set.
It is of course also possible to make to form up-narrow and down-wide structure inside top connection 62, abuts the upper surface of nozzle 64 and connect On step surface inside first 62.
The use process of the pressure-guiding sand blower 60 of the utility model is illustrated with reference to the accompanying drawing:
As shown in Figure 1, Figure 2 and Figure 3, in use, by the upper end of pressure-guiding sand blower 60 by being insulated in the connection of top connection 62 Device 50, the lower end of pressure-guiding sand blower 60 connect lower packet 70 by lower contact 65, and by 10 G.I.H of oil pipe need into At the stratum of row pressure construction, setting ball is put into, setting ball can be clamped with lower flow channel 642, i.e. setting ball is located at the first working position It sets, to block pressure break channel, at this point, building the pressure 5~10 minutes, upper packer 50 can be under the action of the pressure difference that throttling is formed It sets, fracturing fluid sets lower packing via that can enter lower packet 70 by pilot channel after 6411 filtering of filter sand seam;On After lower two packer settings, pressure is improved, so that setting ball passes through lower flow channel 642 and enters in main body 61, and in the resistance of plug 63 It is placed in main body 61 under gear effect, so that pressure break channel is opened, i.e. setting ball is located at the second operating position, at this point, fracturing fluid energy It enough smoothly passes over pressure break channel and is sprayed via sand jet outlet 612, pressing crack construction is smoothly carried out.
As shown in figure 3, the utility model additionally provides a kind of double envelope single deck tape-recorder fracturing strings, include at least from top to bottom according to The upper packer 50 of secondary connection, above-mentioned pressure-guiding sand blower 60, lower packet 70 and starting taper 80, wherein pressure-guiding sand blower 60 is logical It crosses top connection 62 to connect with upper packer 50, pressure-guiding sand blower 60 is connected by lower contact 65 with lower packet 70, and starting taper 80 has There is centralizer body.
In view of by the mandatory section construction of fracturing packer, after pressure break completes an interval, pitching, which is skidded, to be covered, carry out next The pressing crack construction of interval, if construction interval is more, tripping in packer is just more, and degree of extension is more repeatedly for upper packer;Packer Performance and sealing effect are just affected, and easily pressure break are caused to fail;Closing well open flow, formation sand production, upper lifting pipe post after pressure break is complete When easily there is sand card, cause overhaul accident;Processing difficulty is big, and the period is long, and personnel labor intensity is big, and safety is poor.
To solve the above-mentioned problems, it is preferred that upper packer 50 uses K344 packer, and lower packet 70 uses K341 Packer.
When carrying out multiple fracturing construction, since pressure-guiding sand blower 60 is the operating position by changing setting ball, realize The throttling of pressure-guiding sand blower 60 forms pressure difference set packer or carries out pressing crack construction operation, therefore, completes the first interval pressure After splitting construction, it is only necessary to which above mentioning double envelope single deck tape-recorder fracturing strings unseals upper packer 50 and lower packet 70, then makes pilot sandblasting Device 60 is moved to the second interval, then puts into a setting ball, sets upper packer 50 and lower packet 70, upper and lower two packer After setting, pressure is improved, so that setting ball passes through lower flow channel 642 and enters in main body 61, and underlying in the barrier effect of plug 63 In in main body 61, so that pressure break channel is opened, the pressing crack construction of the second interval can be carried out, completes the second interval pressing crack construction Afterwards, it is only necessary to which being again stepped up double envelope single deck tape-recorder fracturing strings unseals upper packer 50 and lower packet 70, then according to the second layer The mode of section pressing crack construction carries out next interval pressing crack construction.
Specifically, as shown in Figure 4, Figure 5 and Figure 6, lower packet 70 includes central tube 71 and sets component 76, wherein in The upper and lower ends of heart pipe 71 are connected separately with the first connector 78 and the second connector 79, are arranged with packing element 72, packing element on central tube 71 72 both ends are arranged with connecting cylinder 73 and lower connecting cylinder 74 respectively, wherein packing element 72 and upper connecting cylinder 73 and lower connecting cylinder 74 Between specific connection type be the prior art, details are not described herein, and the lower part of lower connecting cylinder 74 and central tube 71 are tightly connected, It descends and is equipped with O type sealing ring between the lower part of connecting cylinder 74 and central tube 71, and lower connecting cylinder 74 can the opposite shifting of central tube 71 Dynamic, the second connector 79 can play position-limiting action to the movement of lower connecting cylinder 74, i.e. the second connector 79 can stop lower connecting cylinder 74 Continue to move down, protection is equipped between upper connecting cylinder 73 and packing element 72 and between lower connecting cylinder 74 and packing element 72 and is risen ring 75, it is contemplated that set, unseal due to multiple, packer shoulder well damage can be made, resistance to pressure difference ability dies down, causes to insulate Device sets not tight problem, protects the end face of ring 75 toward each other of rising to be respectively equipped with multiple grooves 751 two, it is preferred that setting The multiple grooves 751 on 75 end face of ring that rise are protected to be arranged at equal intervals in each, and the depth of each groove 751 is identical, passes through setting Multiple grooves 751, so that protection is risen, ring 75 can expand, with packing element 72 with good elasticity with the expansion of packing element 72 It shrinks and restores as former state, the problem of so as to effective solution packer shoulder, lower packet 70 is enable to be repeated as many times, can That leans on setting and unsealing, to realize the pressure break of multistage;
Setting component 76 includes the connector 761 being set on central tube 71, the lower end of connector 761 and upper connecting cylinder 73 It is tightly connected, specifically, the lower end of connector 761 is equipped with internal screw thread, the upper end of upper connecting cylinder 73 is equipped with external screw thread, passes through interior spiral shell Line is threadedly engaged with externally threaded, and connector 761 connects with upper connecting cylinder 73, and upper connecting cylinder 73 and connector 761 it Between be equipped with O-ring seal;The top of connector 761 passes through 78 phase of the first connector of shear pin 762 and 71 upper end of central tube It connects, and there is annular space 77 between connector 761 and central tube 71, central tube 71 is equipped with the liquid injection port being connected with annular space 77 711, it is from top to bottom successively arranged dummy piston 763 in annular space 77 and sets connector 764, dummy piston 763 can opposite central tube 71 is mobile, and the bottom surface of dummy piston 763, which is equipped with, to be located in connector 761 and set the retaining ring 7631 between connector 764, retaining ring 7631 top be equipped with solution sealing of hole 76311, set connector 764 be equipped with deblocking runner 7641 and axially through set runner 7642, set runner 7642 bottom end be equipped with ball-and-seat 765, between dummy piston 763 and central tube 71, dummy piston 763 with O-shaped sealing is equipped between connector 761, between ball-and-seat 765 and central tube 71, between ball-and-seat 765 and connector 761 Circle, ball-and-seat 765 make liquid that cannot flow to dummy piston 763, liquid injection port 711, annular space 77 and list only towards the flowing of packing element 72 Stream valve 765, which is sequentially communicated to be formed, sets channel, and liquid can be flowed between packing element 72 and central tube 71 by setting channel, makes glue 72 expansion of cylinder is set, and the lower end of deblocking runner 7641 is connected with annular space 77, and the upper end of deblocking runner 7641 is supported with retaining ring 7631 It connects, and unseal runner 7641 to be connected to form deblocking channel with solution sealing of hole 76311 by setting moving up for connector 764, specifically , when above proposing deblocking, central tube 71 cuts shear pin 762 and relative to the movement of connector 761, and the drive of central tube 71, which is set, to be connect First 764 synchronize and move up, so that the upper end of deblocking runner 7641 is connected with solution sealing of hole 76311, deblocking channel conductive, so that Liquid between packing element 72 and central tube 71 can realize deblocking by the outflow of deblocking channel, when needing to set again, due to Pressure is larger in central tube 71, so that central tube 71 can be mobile relative to connector 761, it is same that the drive of central tube 71 sets connector 764 Step moves down, so that the upper end of deblocking runner 7641 is blocked by retaining ring 7631, unseals channel enclosed, sets channel connection, Ji Keshi Now set again.
Further, protecting the ring 75 that rises is that the ring 75 that rises is protected made of spring steel, spring steel tensile strength with higher, Elastic limit and high fatigue strength, so that lower packet 70 can be repeated as many times, reliably set and unseal.
Further, as shown in Figure 1, double envelope single deck tape-recorder fracturing strings further include the hydraulic anchor 40 for being connected to 50 upper end of upper packer With the safety joint 30 for being connected to 40 upper end of hydraulic anchor.
The double envelope single deck tape-recorder fracturing strings for illustrating the utility model with reference to the accompanying drawing carry out the worked of staged fracturing Journey:
As shown in Figure 1, the upper end connected pipes 10 of double envelope single deck tape-recorder fracturing strings are formed tool string, wherein double envelope single deck tape-recorders Fracturing string include sequentially connected safety joint 30 from top to bottom, hydraulic anchor 40, upper packer 50, pressure-guiding sand blower 60, under Packer 70 and starting taper 80;
Specific construction step are as follows:
1, it will be arrived under tool string in casing 20 and be located at the first interval with pressure break;
2, setting ball is put into, setting ball is placed at the lower flow channel 642 of the nozzle 64 of pressure-guiding sand blower 60, builds the pressure 5~10 Minute, set upper packer 50 and lower packet 70 respectively;
3, pressure is improved, setting ball passes through 642 downlink of lower flow channel, pressure break channel is opened, at this point, due to the knot of nozzle 64 The effect for the chock pressure difference that structure generates, upper packer 50 are still within the state of setting, work of the lower packet 70 due to ball-and-seat 765 With making it be still in the state of setting, reach condition necessary to pressing crack construction, carry out pressing crack construction;
4, construction finishes, and carries out open flow, open flow operation is the prior art, and details are not described herein;
5, anti-flushing well cleans 77 sand setting of annular space, and anti-flushing well operation is the prior art, and details are not described herein;6, double envelopes are above proposed Single deck tape-recorder fracturing string unseals lower packet 70, and tool string is promoted to the second interval;
7, step 2~6 are repeated, the second interval pressing crack construction, backwash, deblocking are completed;
8, step 2~6 are repeated again, complete third interval pressing crack construction, and act tool string.
It should be noted that carrying out anti-flushing well immediately when there is sand plug phenomenon in construction, it is heavy on the one hand to clean annular space 77 Sand, another aspect deblocking packer carry out the pressing crack construction of next interval convenient for above mentioning double envelope single deck tape-recorder fracturing strings.
Then by the continuous repetition to the above process, in layer up propose circulation pressure break, reach to multiple intervals The gradually purpose of pressure break, so that the realization for making the construction of one-time process tubing string carry out pressure break step by step to multiple intervals provides possibility.
In conclusion double envelope single deck tape-recorder fracturing strings provided by the utility model have the advantage that
(1), fractured layer number of segment is unrestricted, can complete the pressing crack construction of any multistage, improves construction efficiency, and reduction is applied Work cost;
(2), the optional any interval of pressure, controls each interval treatment scale, is transformed with strong points;
(3), have the function of backwash to squeeze, it can be achieved that owing to measure to replace, since the amount of owing replaces crowded construction can be in casing clamp away from interior remaining big The fracturing sand of amount, and double envelope single deck tape-recorder fracturing strings of the utility model have the function of backwash, can carry out after pressing crack construction anti- Sand washing is recycled, card is rinsed well away from interior sand setting, guarantees that lower step construction is gone on smoothly;
(4), the composed structure of double envelope single deck tape-recorder fracturing strings is simple, and tool external diameter is small, length is short, in inclination section handling capacity By force, and design has reliable anti-sticking, back off structure, highly-safe.
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.And it should be noted that the utility model each component part It is not limited in above-mentioned overall applicability, each technical characteristic described in the specification of the utility model can select according to actual needs It selects one and individually uses or select the multinomial use that combines, therefore, the utility model covers and this crime in the nature of things The related other combinations of bright point and concrete application.

Claims (10)

1. a kind of pressure-guiding sand blower, which is characterized in that the pressure-guiding sand blower includes:
Main body, is in the hollow columnar of both ends open, the side wall of the main body be equipped with axially through pressure guide hole and radial pass through Logical sand jet outlet, and the sand jet outlet is not connected to mutually with the pressure guide hole, what the upper end of the main body can be removably mounted, which be connected with, connects The lower end of head, the main body is connected with plug;
Orifice union comprising nozzle and setting ball, the nozzle are set in the top connection, the top connection, the spray Mouth successively seals with the main body and is connected to form pressure break channel, between the outer peripheral surface of the nozzle and the inner surface of the top connection Be formed with honeycomb duct, the entrance of the nozzle is stitched equipped with a plurality of filter sand, the filter sand seam, the honeycomb duct and the pressure guide hole according to Secondary connection forms pilot channel, and the setting ball has the first operating position of the lower part for blocking the nozzle and passes through described Nozzle abuts the second operating position of the plug.
2. pressure-guiding sand blower according to claim 1, which is characterized in that
The nozzle includes the upper runner for from top to bottom setting gradually and being connected to and lower flow channel, and the upper runner is in from top to bottom gradually The necking down shape of contracting, the lower flow channel are in isometrical shape, and the filter sand, which seams, to be placed on the side wall of the upper runner, the setting ball Outer diameter is less than the upper-end inner diameter of the upper runner, and the outer diameter of the setting ball is greater than the internal diameter of the lower flow channel.
3. pressure-guiding sand blower according to claim 1, which is characterized in that
The sandblasting hole radially penetrated through is additionally provided on the side wall of the main body.
4. pressure-guiding sand blower according to claim 1, which is characterized in that
The nozzle is carboloy nozzle.
5. pressure-guiding sand blower according to claim 1, which is characterized in that
The upper end outer peripheral surface of the main body is equipped with annular groove, and the lower end periphery face of the nozzle is circumferentially arranged with can be with the annular groove card The annular ridge for connecing cooperation, by the clamping engagement of the annular ridge and the annular groove, the nozzle connects with the main body.
6. pressure-guiding sand blower according to any one of claim 1 to 5, which is characterized in that
The inner surface of the top connection is radially equipped with baffle ring, and the internal diameter of the baffle ring is less than the inlet diameter of the nozzle, institute The upper surface for stating nozzle is abutted with the lower end surface of the baffle ring.
7. a kind of double envelope single deck tape-recorder fracturing strings, which is characterized in that double envelope single deck tape-recorder fracturing strings include at least from top to bottom according to The upper packer of secondary connection, pressure-guiding sand blower, lower packet and starting taper such as described in any one of claims 1 to 6.
8. double envelope single deck tape-recorder fracturing string according to claim 7, which is characterized in that the lower packet includes:
Central tube, is arranged with packing element thereon, and the both ends of the packing element are arranged with connecting cylinder and lower connecting cylinder, the lower company respectively The lower part of connect cylinder is connect with the basepipe seal, and the lower connecting cylinder can be mobile relative to the central tube, the upper connection It between cylinder and the packing element and is equipped with protection between the lower connecting cylinder and the packing element to rise ring, two protections are risen ring court End face to each other is respectively equipped with multiple grooves;
Set component comprising the connector being set on the central tube, the lower end of the connector and the upper connecting cylinder It is tightly connected, the top of the connector is connected by shear pin with the central tube, and the connector and the center There is annular space between pipe, the central tube is equipped with the liquid injection port that is connected with the annular space, in the annular space from top to bottom according to Secondary to be equipped with dummy piston and set connector, the dummy piston can be mobile relative to the central tube, the bottom surface of the dummy piston Equipped with the connector and the retaining ring set between connector is located in, the top of the retaining ring is equipped with solution sealing of hole, the seat Sealing joint be equipped with deblocking runner and axially through set runner, the bottom end for setting runner is equipped with ball-and-seat, the note Liquid mouth, the annular space and the ball-and-seat, which are sequentially communicated to be formed, sets channel, the lower end of the deblocking runner and the annular space phase The upper end of connection, the deblocking runner is abutted with the retaining ring, and the deblocking runner can set moving up for connector by described It is connected to form deblocking channel with the solution sealing of hole.
9. double envelope single deck tape-recorder fracturing strings according to claim 8, which is characterized in that
The protection rises by ring to protect the ring that rises made of spring steel.
10. double envelope single deck tape-recorder fracturing strings according to any one of claims 7 to 9, which is characterized in that
Double envelope single deck tape-recorder fracturing strings further include being connected to the hydraulic anchor of the upper packer upper end and being connected to the waterpower The safety joint of anchor upper end.
CN201821831891.5U 2018-11-08 2018-11-08 Pressure-guiding sand blower and double envelope single deck tape-recorder fracturing strings Active CN209385106U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113047795B (en) * 2019-12-27 2022-07-05 中国石油天然气股份有限公司 Method for pressing reducing oil pipe string

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113047795B (en) * 2019-12-27 2022-07-05 中国石油天然气股份有限公司 Method for pressing reducing oil pipe string

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