CN207229085U - Without throttling dual channel straddle test tubing string - Google Patents
Without throttling dual channel straddle test tubing string Download PDFInfo
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- CN207229085U CN207229085U CN201721267382.XU CN201721267382U CN207229085U CN 207229085 U CN207229085 U CN 207229085U CN 201721267382 U CN201721267382 U CN 201721267382U CN 207229085 U CN207229085 U CN 207229085U
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Abstract
The utility model is a kind of without throttling dual channel straddle test tubing string, including：Outer barrel, it includes pilot outer tube and pilot inner tube, forms pressure chamber therebetween, pilot inner tube is circumferentially arranged with multiple pressure guide holes connected with pressure chamber；Core pipe, its is mobile to be arranged in outer barrel, and the upper end is connected with oil pipe, its lower end, which is equipped with, can block the ball seat for setting ball, core pipe circumferentially arranged with multiple pressure transmission holes, pressure transmission hole with pressure guide hole diametrically when, core pipe is connected with pressure chamber；Upper packer below outer barrel and the lower packet below upper packer, sand blast sliding sleeve is equipped between upper packer and lower packet, sand blast sliding sleeve is radially equipped with sand jet outlet and is equipped with bridge passage vertically, annular space, lower packet and the lower annular space insulated between inner tube and bridge passage between upper packer and upper packing inner tube form setting chamber, and setting chamber is connected with pressure chamber.For the utility model without throttling, sand-passing amount is high, avoids the damage to casing, sets, unseals reliably, efficient.
Description
Technical field
Oil, natural gas extraction technical field are the utility model is related to, is a kind of zonal testing fracturing string, is specifically one
Kind be suitable for from straight well, high angle hole or horizontal well carry out pressure break with exploit oil gas without throttle dual channel straddle test pipe
Column.
Background technology
In oil exploitation, for abnormal high temperature high pressure low porosity and low permeability reservoir, its producing well is with high angle hole, horizontal well etc.
Based on well type, staged fracturing must be carried out before operation, mechanical staged fracturing is generally in casing cementing, wherein, at present
The domestic old well refracturing of horizontal well is mainly using pitching sliding sleeve in pipe and double envelope single deck tape-recorder fracturing techniques.
But pitching sliding sleeve fracturing technology is difficult there are lift pipe string in pipe, double envelope single deck tape-recorder fracturing techniques are shut off using nozzle
Or central tube shuts off, and shut off and easily lead to low sand-passing amount, easy sand card, reduce fluid efficiency, also casing and tool body are damaged
Than more serious, and construction operation once occur sand plug deblocking it is relatively difficult, the construction operation cycle length, operating efficiency is low, particularly,
In pressing crack construction, due to sand jet outlet throttling adding the sand stage can to casing produce inevitably damage, be mainly shown as with
Lower two aspects：(1) haydite in load fluid causes to rush casing wall since high speed is by sand jet outlet under the action of inertia
Hit, this is the primary failure mode of casing wall；(2) turbulent flow that is produced around sand jet outlet, turbulent flow, cause plough of the haydite to casing wall
Cut, make the peeling on microcosmic occurs around internal surface of sleeve pipe face sand jet outlet.
In view of the above-mentioned problems of the prior art, the present inventor combines the design and use of related manufacturing field for many years
Experience, there is provided it is a kind of without throttling dual channel straddle test tubing string, to overcome drawbacks described above.
Utility model content
The purpose of this utility model is to provide a kind of without throttling dual channel straddle test tubing string, it uses no saving design,
Sand-passing amount is improved, avoids the damage to casing, sets, unseal reliably, it is efficient.
The above-mentioned purpose of the utility model can be realized using following technical proposal：
The utility model provides one kind without throttling dual channel straddle test tubing string, it includes：Outer barrel, it includes pilot outer tube
With the pilot inner tube in the pilot outer tube, pressure chamber, the pilot are formed between the pilot outer tube and pilot inner tube
Inner tube is circumferentially arranged with multiple pressure guide holes connected with the pressure chamber；Core pipe, its is mobile to be arranged in the outer barrel, institute
The upper end for stating core pipe is connected with oil pipe, and the lower end of the core pipe, which is equipped with, can block the ball seat for setting ball, and the core pipe is circumferentially arranged with more
A pressure transmission hole, the pressure transmission hole and the pressure guide hole diametrically in the state of, the core pipe is connected with the pressure chamber；
Upper packer and lower packet, the upper packer is equipped with upper packing inner tube in the lower section of the outer barrel and its, under described
Packer be arranged on the lower section of the upper packer and its in be equipped with lower packing inner tube, the upper packer and the lower packet it
Between be equipped with sand blast sliding sleeve, the sand blast sliding sleeve is radially equipped with sand jet outlet, and the sand blast sliding sleeve is equipped with bridge passage vertically, described
Annular space, the lower packet and the lower annular space insulated between inner tube and institute between upper packer and the upper packing inner tube
State bridge passage and form setting chamber, the setting chamber is connected with the pressure chamber.
In a preferred embodiment, the core pipe includes pull rod, central tube and the setting pipe being sequentially connected from top to bottom,
The upper end of the pull rod is connected with the oil pipe, and the pressure transmission hole is arranged on the central tube, and the lower end of the setting pipe is equipped with
The ball seat of energy radial dilatation.
In a preferred embodiment, the lower end of the pull rod is connected with the upper end of the central tube by contiguous block, institute
State outer barrel and further include cutting ferrule pipe, the cutting ferrule pipe is connected to the top of the pilot outer tube, and the upper end of the cutting ferrule pipe, which can block, to be set
In the contiguous block.
In a preferred embodiment, the first compound connecting pipe is equipped between the outer barrel and the upper packer, it is described
First compound connecting pipe includes the first compound pilot outer tube and the first compound pilot inner tube, the first compound pilot outer tube and institute
State and form the first pilot passage between the first compound pilot inner tube, the pressure chamber passes through the first pilot passage and the seat
Envelope chamber is connected.
In a preferred embodiment, the internal diameter of the described first compound pilot inner tube is more than the outside diameter of the setting pipe,
In the state of the core pipe moves down and the ball seat of the setting pipe is located in the described first compound pilot inner tube, the setting pipe
Ball seat energy radial dilatation.
In a preferred embodiment, the lower end of the pilot outer tube passes through outside pressure guiding joint and the described first compound pilot
Pipe is connected, and the lower end of the pilot inner tube is connected by Flush coupling with the described first compound pilot inner tube, the Flush coupling
The contact block that the multiple inner wall sealings with the pressure guiding joint of circumferentially spaced projection contact, is equipped with the contact block and runs through
The well washing hole of the Flush coupling and the pressure guiding joint, is equipped with and the pressure between the pressure guiding joint and the Flush coupling
The annular space of power chamber connection.
In a preferred embodiment, between the described first compound connecting pipe and the upper packer, the upper packer
Seal nipple is equipped between the sand blast sliding sleeve, seal cartridge, the seal nipple and institute are equipped with the seal nipple
The annular space stated between seal cartridge is connected with the setting chamber.
In a preferred embodiment, the second compound connecting pipe is equipped between the sand blast sliding sleeve and the lower packet,
The second compound connecting pipe includes the second compound pilot outer tube and the second compound pilot inner tube, the second compound pilot outer tube
The second pilot passage is formed between the described second compound pilot inner tube, the second pilot passage is connected with the setting chamber
It is logical.
In a preferred embodiment, seal nipple is equipped between the described second compound connecting pipe and the lower packet,
Seal cartridge is equipped with the seal nipple, the annular space between the seal nipple and the seal cartridge and the setting chamber phase
Connection.
In a preferred embodiment, cage is equipped with the sand blast sliding sleeve, the perisporium of the cage is equipped with multiple and institute
State the through hole that the sand jet outlet of sand blast sliding sleeve is connected.
The characteristics of the utility model is without throttling dual channel straddle test tubing string and advantage are：
The utility model is by transferring or above putting forward core pipe, in the pilot for realizing the pressure transmission hole and outer barrel on the central tube of core pipe
The corresponding connection or dislocation of pressure guide hole on pipe are closed, and then realize the connection or closing of core pipe and pressure chamber, that is, are thrown when setting
Ball builds the pressure, and highly pressurised liquid enters pressure chamber from core pipe through pressure transmission hole and pressure guide hole, and enters setting chamber from pressure chamber, is sealed in realization
Every setting for device and lower packet, core pipe is transferred after setting, realizes the closing of pressure chamber, ensures upper packer and lower packing
Device sets state, and above puies forward core pipe in deblocking, pressure chamber is connected pressure release with core pipe again, realizes upper packer and lower envelope
Every the deblocking of device, set, unseal reliably, avoid upper lifting pipe post deblocking difficulty, pressure break is efficient；Meanwhile because being built the pressure by pitching
Realize setting for upper packer and lower packet so that the sand jet outlet at sand blast sliding sleeve increased without saving design
Sand amount, by the damage washed away minimum, avoid to casing to casing, service life length；Moreover, connection pressure chamber with it is setting
Chamber is formed at the annular space of tubing string, and in fracturing process, pressure chamber is isolated with setting chamber with the construction runner of tubing string, ensures pressure chamber
Clean with setting intracavity liquid, guarantee sets, unseals the service life for reliably, ensureing each component.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the utility model
Example is applied, for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is structure diagram of the utility model without throttling dual channel straddle test tubing string；
Fig. 2 is the partial enlargement structural representation in the A portions in Fig. 1；
Fig. 3 is the partial enlargement structural representation in the B portions in Fig. 1；
Fig. 4 is the partial enlargement structural representation in the C portions in Fig. 1.
Drawing reference numeral explanation：
1st, outer barrel；11st, cutting ferrule pipe；12nd, pilot outer tube；13rd, pilot inner tube；131st, pressure guide hole；14th, pressure chamber；2nd, core pipe；
21st, pull rod；22nd, central tube；221st, pressure transmission hole；23rd, setting pipe；231st, ball seat；24th, contiguous block；3rd, the first compound connecting pipe；
31st, the first compound pilot outer tube；32nd, the first compound pilot inner tube；33rd, the first pilot passage；4th, upper packer；5th, in upper packing
Pipe；51st, liquid flow hole；6th, sand blast sliding sleeve；61st, sand jet outlet；62nd, cage；7th, the second compound connecting pipe；71st, outside the second compound pilot
Pipe；72nd, the second compound pilot inner tube；73rd, the second pilot passage；81st, Flush coupling；82nd, pressure guiding joint；83rd, well washing hole；84、
First seal nipple；85th, the first seal cartridge；86th, the second seal nipple；87th, the second seal cartridge；88th, the 3rd seal nipple.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
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 embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
As shown in Figures 1 to 4, the utility model provides a kind of without throttling dual channel straddle test tubing string, it includes：Outer barrel
1, it includes pilot outer tube 12 and the pilot inner tube 13 in the pilot outer tube 12, the pilot outer tube 12 and pilot inner tube
Pressure chamber 14 is formed between 13, the pilot inner tube 13 is circumferentially arranged with multiple pressure guide holes 131 connected with the pressure chamber 14；
Core pipe 2, its is mobile to be arranged in the outer barrel 1, and the upper end of the core pipe 2 is connected with oil pipe, and the lower end of the core pipe 2 is set
There is the ball seat 231 that can block and set ball, the core pipe 2 is led circumferentially arranged with multiple pressure transmission holes 221 in the pressure transmission hole 221 with described
In the state of pressing hole 131 diametrically, the core pipe 2 is connected with the pressure chamber 14；Upper packer 4 and lower packet (figure
Not shown in), the upper packer 4 is arranged on the lower section of the outer barrel 1 and it is interior equipped with upper packing inner tube 5, the lower packet
Lower packing inner tube is equipped with the lower section of the upper packer 4 and its, is set between the upper packer 4 and the lower packet
There is sand blast sliding sleeve 6, the sand blast sliding sleeve 6 is radially equipped with sand jet outlet 61, and the sand blast sliding sleeve 6 is equipped with bridge passage, institute vertically
State annular space, the lower packet and the lower annular space insulated between inner tube between upper packer 4 and the upper packing inner tube 5
Setting chamber is formed with the bridge passage, the setting chamber is connected with the pressure chamber 14.
Specifically, outer barrel 1 is substantially cylindrical, its pilot inner tube 13 is arranged in pilot outer tube 12, pilot inner tube 13
The outside projection boss of outer wall of upper end, pilot inner tube 13 are bonded by the boss with the inner wall sealing of pilot outer tube 12, such as should
Sealing ring can be set between boss and pilot outer tube 12, and pilot inner tube 13 circumferentially sets multiple at equal intervals in the lower section of its boss
Pressure guide hole 131, with into pressure chamber 14 influent realize packer set or liquid from pressure chamber is flowed back to core pipe 2 real
The deblocking of existing packer；Core pipe 2 is substantially cylindrical, and the upper end of core pipe 2 is connected by oil connection with oil pipe, to pass through oil pipe
Liquid is injected into core pipe 2 and carries out pressure break etc., the ball seat 231 of the lower end of core pipe 2 when not fettering can radial outward dilations, energy
Realize dropping for ball, core pipe 2 circumferentially sets multiple pressure transmission holes 221, quantity and the pressure guide hole 131 of pressure transmission hole 221 at equal intervals
Quantity is equal, and the pressure transmission hole 221 of core pipe 2 can be corresponded with the pressure guide hole 131 of outer barrel, realize the company of core pipe 2 and pressure chamber 14
It is logical, liquid is entered pressure chamber 14 through pressure transmission hole 221, pressure guide hole 131 successively from core pipe 2；Upper packer 4, sand blast sliding sleeve 6 and under
Packer be connected to from top to bottom outer barrel 1 and core pipe 2 lower section (wherein the structure of lower packet is similar with upper packer 4, thus
Not shown in figure), realize that the expansion of upper packer 4 and lower packet is set by pressure chamber 14 and setting chamber, slided by sandblasting
Set 6 injects liquid to target zone, carries out single-interval test, pressure break or acidifying etc., wherein, upper packer 4 and lower packet are to expand
Open formula packer.
Further, as depicted in figs. 1 and 2, the core pipe 2 includes pull rod 21, the central tube 22 being sequentially connected from top to bottom
With setting pipe 23, the upper end of the pull rod 21 is connected with the oil pipe, and the pressure transmission hole 221 is arranged on the central tube 22, institute
The lower end for stating setting pipe 23 is equipped with the ball seat 231 of energy radial dilatation, specifically, pull rod 21 is substantially in a tubular form, pull rod 21
Upper end is connected by oil connection with oil pipe, and the lower end of pull rod 21 is connected with central tube 22, and the inner wall of the lower end of central tube 22 is set
There is internal thread, the outer wall of the upper end of setting pipe 23 is equipped with external screw thread, central tube 22 is threadedly coupled with setting pipe 23, central tube 22
The micro- internal diameter more than or equal to setting pipe 23 of internal diameter, multiple pressure transmission holes 221 on central tube 22 are uniformly arranged on central tube 22
Perisporium and its neighbouring internal thread are simultaneously located at the top of internal thread, and the lower end of setting pipe 23 circumferentially opens up multiple flutings, opens two-by-two
Ram's horn is formed between groove, the inside projection boss of inner wall of the lower end of each ram's horn, encloses multiple ram's horns and sets to form ball seat 231, its
In, ball is solvable ball.
Further, as shown in Figure 1, the lower end of the pull rod 21 and the upper end of the central tube 22 pass through 24 phase of contiguous block
Even, the outer barrel 1 further includes cutting ferrule pipe 11, and the cutting ferrule pipe 11 is connected to the top of the pilot outer tube 12, the cutting ferrule pipe
11 upper end can be arranged in the contiguous block 24, specifically, the lower end of pull rod 21 is connected with the upper end of central tube 22 by tubular
Block 24, which is arranged, to be spirally connected, and realizes the connection of the two, the outside diameter of pull rod 21 is equal with the outside diameter of central tube 22, the outside diameter of certain pull rod 21
Outside diameter with central tube 22 also can be unequal, the internal diameter on the top of contiguous block 24 is matched with pull rod 21, under contiguous block 24
The internal diameter in portion matches with central tube 22, realizes connection therebetween, certainly can also be between contiguous block 24 and pull rod 21, company
Connect and sealing ring is set between block 24 and central tube 22, be not limited herein, cutting ferrule pipe 11 is substantially cylindrical in shape, the lower end of cutting ferrule pipe 11
The outer wall of the upper end of pilot outer tube 12 is bolted in, the upper end of cutting ferrule pipe 11 extends radially inwardly to form necking, the contracting of cutting ferrule pipe 11
Mouthful it is arranged in the upper end of contiguous block 24 and is bonded with the outer wall of pull rod 21, avoids dropping for outer barrel 1 during original state.
Further, as shown in figures 1 and 3, the first compound connecting pipe is equipped between the outer barrel 1 and the upper packer 4
3, the first compound connecting pipe 3 includes the first compound 31 and first compound pilot inner tube 32 of pilot outer tube, and described first is compound
The first pilot passage 33 is formed between pilot outer tube 31 and the first compound pilot inner tube 32, the pressure chamber 14 is by described
First pilot passage 33 is connected with the setting chamber, to realize 4 He of upper packer by the pressure chamber 14 and setting chamber of connection
The expansion of lower packet is set, and the first compound connecting pipe 3 is reduced difficulty of processing, added overcurrent using double-deck tubular column structure
Area, further, the internal diameter of the first compound pilot inner tube 32 are more than the outside diameter of the setting pipe 23, in the core pipe 2
Move down and in the state of the ball seat of the setting pipe 23 231 is located in the described first compound pilot inner tube 32, the setting pipe 23
Ball seat 231 can radial dilatation (namely its ram's horn opens), namely be arranged with the ball seat 231 of ball can be in the liquid pressure in core pipe 2
The lower contact ball of power effect, and then active force is applied to ball seat 231 by ball, ball seat 231 is more than the first of its internal diameter in internal diameter
Radial dilatation in compound pilot inner tube 32, and the setting pipe 23 in core pipe 2 is not displaced downwardly in the first compound pilot inner tube 32
Under state, the setting pipe 23 of core pipe 2 suffers restraints will not radial dilatation.
Further, as shown in figures 1 and 3, the lower end of the pilot outer tube 12 is multiple with described first by pressure guiding joint 82
Close pilot outer tube 31 to be connected, the lower end of the pilot inner tube 13 passes through Flush coupling 81 and the described first compound 32 phase of pilot inner tube
Even, the contact block that the multiple inner wall sealings with the pressure guiding joint 82 of the circumferentially spaced projection of the Flush coupling 81 contact,
The well washing hole 83 through the Flush coupling 81 and the pressure guiding joint 82,82 He of pressure guiding joint are equipped with the contact block
The annular space connected with the pressure chamber 14, i.e., shape between Flush coupling 81 and pressure guiding joint 82 are equipped between the Flush coupling 81
Into passageway bridge, specifically, pressure guiding joint 82 is substantially cylindrical in shape, under the inner wall and pilot outer tube 12 of the upper end of pressure guiding joint 82
The outer wall at end is spirally connected, and the inner wall of the lower end of pressure guiding joint 82 and the outer wall of the upper end of the first compound pilot outer tube 31 are spirally connected, well-flushing
Connector 81 is substantially cylindrical in shape, and Flush coupling 81 is arranged in the inside of pressure guiding joint 82, and the middle part spaced radial of Flush coupling 81 is convex
If multiple contact blocks, the well washing hole 83 at contact block is easy to implement well-flushing, and the outside diameter of the upper and lower part of Flush coupling 81 is less than
The internal diameter of pressure guiding joint 82, the outside diameter of the contact block at the middle part of Flush coupling 81 are equal to the internal diameter of pressure guiding joint 82, Flush coupling 81
Upper end outer wall and the inner wall of the lower end of pilot inner tube 13 be spirally connected, the outer wall of the lower end of Flush coupling 81 and the first compound pilot
The inner wall of the upper end of inner tube 32 is spirally connected, make pressure chamber 14 between pilot outer tube 12 and pilot inner tube 13 by Flush coupling 81 with
Annular space between pressure guiding joint 82 is flowed into the first pilot passage 33 of lower section, to realize 4 He of upper packer into setting chamber
Lower packet is set.
Further, as shown in Figure 1, being equipped with the second compound connecting pipe 7 between the sand blast sliding sleeve 6 and the lower packet,
The second compound connecting pipe 7 includes the second compound 71 and second compound pilot inner tube 72 of pilot outer tube, second composite guide
The second pilot passage 73, the second pilot passage 73 and institute are formed between pressure outer tube 71 and the second compound pilot inner tube 72
State setting chamber to be connected, i.e., bridge passage and lower packet and lower packing in sand blast sliding sleeve 6 are realized by the second pilot passage 73
The connection of annular space between inner tube, realizes the annular space that liquid enters between lower packet and lower packing inner tube, realizes lower packet
Expansion set, and the second compound connecting pipe 7 is reduced difficulty of processing, is added area of passage using double-deck tubular column structure.
Further, as shown in Figure 1, between the first compound connecting pipe 3 and the upper packer 4, the upper packing
Seal nipple is equipped between device 4 and the sand blast sliding sleeve 6, seal cartridge, the seal nipple are equipped with the seal nipple
Annular space between the seal cartridge is connected with the setting chamber, and to ensure that tubing string smoothly connects, pressure is smoothly conducted.Tool
Body, as shown in figure 4, between the first compound connecting pipe 3 and upper packer 4 for the first seal nipple 84 and the first seal cartridge
85, between upper packer 4 and sand blast sliding sleeve 6 for the second seal nipple 86 and the second seal cartridge 87, wherein, the first sealing connects
The inner wall of first 84 upper end and the outer wall of the lower end of the first compound pilot outer tube 31 are spirally connected, outside the upper end of the first seal cartridge 85
Wall connects with the inner wall sealing of the first compound pilot inner tube 32, enables the first pilot passage 33 and the first seal nipple 84 and first
Annular space connection between seal cartridge 85, the lower end of the first seal nipple 84 pass through the upper end of branch sleeve and upper packer 4
Outer wall connects, and the first seal cartridge 85 is inserted in the inside of the upper end of packing inner tube 5, the inner wall of the upper end of upper packing inner tube 5
Annular groove is respectively equipped with the inner wall of lower end, and radial symmetric is equipped with two liquid flow holes 51, liquid flow hole 51 and upper envelope on each annular groove
Annular space between device 4 and upper packing inner tube 5 connects, the inner wall of the upper end of the second seal nipple 86 and the lower end of upper packing inner tube
Outer wall be spirally connected, and its outer wall is tightly connected by branch sleeve and upper packer 4, the inner wall of the lower end of the second seal nipple 86
Sealing is inserted in inside the upper end of sand blast sliding sleeve 6, and what the both ends of the second seal cartridge 87 sealed respectively is inserted in packing
With the inner wall of the cage 62 of sand blast sliding sleeve 6 in the lower end of pipe 5, the annular groove for making to insulate the lower end of inner tube 5 is through the second seal nipple
86 and the second annular space between seal cartridge 87 enter the bridge passage of sand blast sliding sleeve 6, to enter the lower packet of lower section and lower envelope
Every the annular space of inner tube, namely liquid can be by the annular space between the first seal nipple 84 and the first seal cartridge 85, upper packing
The annular groove of pipe 5, the liquid flow hole 51 of upper packing inner tube 5 enter the annular space between upper packer 4 and upper packing inner tube 5, are sealed in realization
Set every the expansion of device 4, and then pass through the liquid flow hole 51 of upper packing inner tube 5 lower end, the annular groove of 5 lower end of upper packing inner tube, the
The bridge passage of annular space, sand blast sliding sleeve 6 between two seal nipples 86 and the second seal cartridge 87 enters lower packet and lower packing
Annular space between inner tube, realizes that the expansion of lower packet is set.
Similarly, it is described as shown in Figure 1, being equipped with seal nipple between the second compound connecting pipe 7 and the lower packet
Seal cartridge is equipped with seal nipple, the annular space between the seal nipple and the seal cartridge is connected with the setting chamber
Logical, to ensure that tubing string smoothly connects, pressure is smoothly conducted, and the lower end of lower packet can set plug, specifically, the second composite guide
(scheme for the 3rd seal nipple 88 and the 3rd seal cartridge between pressure pipe 7 and lower packet (because of length reason, not shown in figure)
Not shown in), the 3rd seal nipple 88 and the connection relation of the 3rd seal cartridge and the second compound connecting pipe 7 and lower packet with
Second seal nipple 86 and the second seal cartridge 87 are identical, and details are not described herein.
Further, cage 62 is equipped with the sand blast sliding sleeve 6, the perisporium of the cage 62 is equipped with the multiple and sandblasting and slides
The through hole that the sand jet outlet 61 of set 6 is connected, specifically, sand blast sliding sleeve 6 is substantially cylindrical in shape, the cage worn inside it is two about 62
The contact block that the circumferentially spaced multiple inner wall sealings with sand blast sliding sleeve 6 of projection in end contact, make sand blast sliding sleeve 6 and cage 62 it
Between radially in forming through hole that is corresponding with sand jet outlet 61 and connecting on contact block, and formed vertically between contact block two-by-two
Bridge passage, and bridge passage is independent without connecting mutually with sand jet outlet 61, the diameter of ball is smaller than the diameter of cage 62, makes ball direct
Fallen by cage, the diameter of ball is equal to the diameter of cage 62, after a part for liquid corrosion dissolving ball in well, ball
Fall, be not limited herein again.Setting for the packer of the utility model does not lean on the throttling of traditional sense to set, and by by ball
Cage and sand blast sliding sleeve Integral design, the flow section design of sand jet outlet 61 is bigger than pipe aperture, and flow velocity is low during mistake load fluid,
Wear small, while sand blast sliding sleeve 6 can use special cemented carbide material, further increase wearability, reach by throttling
Set 5-6 times of double envelope single deck tape-recorder instrument sand-passing amounts.
Specific work process of the utility model without throttling dual channel straddle test tubing string is described in detail below：
In original state, it will be transferred in well head by oil pipe without throttling dual channel straddle test tubing string and treat fractured layer,
At this time, diametrically, core pipe 2 is connected by pressure transmission hole 221 and pressure guide hole 131 with pressure chamber 14 for pressure transmission hole 221 and pressure guide hole 131
Logical, setting pipe 23 is located in pilot inner tube 13 and Flush coupling 81, and positioned at the top of the first compound connecting pipe 3, setting pipe 23
The outside diameter of the ball seat 231 of lower end is substantially equal to the internal diameter of Flush coupling 81, set before first carry out direct flushing, i.e., from oil pipe to
Injection flushing fluid in core pipe 2, detergent remover enters the annular space of oil pipe and casing and return to ground from well washing hole completes well-flushing, backwash
Thoroughly；
When setting, solvable ball is first put into core pipe 2, solvable ball sealing is seated on ball seat 231, then into core pipe 2
Suppress, that is, inject pressure fluid, pressure fluid is blocked by the ball, and enters pressure chamber 14 and seat from pressure transmission hole 221 and pressure guide hole 131
Intracavitary is sealed, the pressure of pressure chamber 14 and setting intracavitary is increased, under the action of setting cavity pressure liquid, 4 He of upper packer
The cartridge of lower packet expands completion and sets, i.e., to passing through respectively above and below the casing of fractured layer perforated interval
Upper packer 4 and lower packet realize sealing, after the completion of setting, transfer core pipe 2 by oil pipe in well head, make 221 He of pressure transmission hole
Pressure guide hole 131 is axially offset, and with confining pressure chamber 14 and setting chamber, ensures pressure chamber 14 and setting chamber during follow-up fracture job
Sealing (before above putting forward core pipe 2, pressure chamber 14 and setting chamber are always maintained at pressure setting state), at this time, ball is still arranged in ball seat
At 231, the lower end of the setting pipe 23 of core pipe 2 is located in the first compound pilot inner tube 32 of the first compound connecting pipe 3；
During pressure break, fracturing fluid is injected into core pipe 2, fracturing fluid acts on ball and ball seat 231, the ram's horn of ball seat 231 is existed
Radial dilatation under the action of ball, ball successively through the first compound connecting pipe 3, the first seal cartridge 85, it is upper packing inner tube 5 and fall into ball
Cage 62, after ball by liquid corrosion in well until after diameter is less than cage 62, ball is successively through in the second compound connecting pipe 7 and lower packing
Manage and fall, the sand jet outlet that fracturing fluid passes through sand blast sliding sleeve 6 radially sprays into fractured layer, carries out pressure break, test or acidifying；
During deblocking, core pipe 2 is above put forward by oil pipe in well head, because of upper packer 4 and lower packet seals and casing, beyond institute
Cylinder 1 will not be moved up with core pipe 2, when its pressure transmission hole 221 is moved in core pipe 2 with the radially corresponding connection of pressure guide hole 131 of outer barrel, pressure
Power chamber 14 is connected with core pipe 2, and the pressure fluid in pressure chamber 14 can enter core pipe from pressure chamber 14, is returned to ground, is so realized
The pressure release of pressure chamber 14 and setting chamber, upper packer 4 and lower packet realize decompression, upper lifting pipe post and another pressure break purpose of tripping in
Layer, which repeats above-mentioned action, can complete all fracturing works.
The utility model is transferred by oil pipe in well head or above puies forward core pipe 2, realizes the pressure transmission hole on the central tube 22 of core pipe 2
221 corresponding with the pressure guide hole 131 in the pilot inner tube 13 of outer barrel 1 connections or dislocation are closed, and then realize core pipe 2 and pressure chamber
14 connection or closing, that is, when setting pitching build the pressure, highly pressurised liquid enters pressure from core pipe 2 through pressure transmission hole 221 and pressure guide hole 131
Chamber 14, and enter setting chamber from pressure chamber 14, realize setting for upper packer 4 and lower packet, core pipe is transferred after setting
2, realize the closing of pressure chamber 14, ensure upper packer 4 and lower packet sets state, and above puies forward core pipe 2 in deblocking, makes
Pressure chamber 14 is connected with pressure release with core pipe 2 again, realizes the deblocking of upper packer 4 and lower packet, that is, passes through dual channel (pressure
Chamber and setting chamber are as a runner, and construction runner is as a runner) realize respectively and set/unseal and pressure break, set, unseal
Reliably, upper lifting pipe post deblocking difficulty is avoided, easy to operate, pressure break is efficient, and construction efficiency is high.
The utility model realizes setting for upper packer 4 and lower packet because building the pressure by pitching so that at sand blast sliding sleeve 6
Sand jet outlet 61 without saving design, high flow rate operation can be met under the conditions of equal tubing, sand speed is crossed and reaches 6m3/
Min, increases sand-passing amount, and sand-passing amount will wash away minimum up to 1000 tons to casing, avoid damage (its to casing
Middle oil pipe and the utility model are respectively positioned in casing), service life length.
Pressure chamber 14 and the setting chamber of the utility model connection are formed at the annular space of tubing string, and by pressure chamber 14 with it is setting
Chamber cross-layer connects and the smooth connection of each instrument is passed to, and upper packer 4 and lower packet is set (i.e. using a hydraulic system
Realized and set using pressure chamber 14 and setting chamber at the same time), in fracturing process, construction stream of the pressure chamber 14 with setting chamber with tubing string
Road is completely isolated, ensures that pressure chamber 14 and setting intracavity liquid are clean, avoids the accidents such as the sand plug, the sand fallout that occur in work progress
Influence caused by being unsealed on instrument, guarantee set, unseal the service life for reliably, ensureing each component, it is ensured that construction safety.This reality
With the new construction efficiency for being used cooperatively with snubbing serving device, being greatly improved old well refracturing, meet complex hole condition
Old well refracturing down, has a extensive future.
The above descriptions are merely exemplary embodiments of the present utility model, and is not used to the model of limitation the utility model
Enclose.Any those skilled in the art, the equivalent variations made on the premise of the principle of the utility model and design is not departed from
With modification, all should belong to the protection range of the utility model.
Claims (10)
- It is 1. a kind of without throttling dual channel straddle test tubing string, it is characterised in that described without throttling dual channel straddle test tubing string bag Include：Outer barrel, it includes pilot outer tube and the pilot inner tube in the pilot outer tube, the pilot outer tube and pilot inner tube Between form pressure chamber, the pilot inner tube is circumferentially arranged with multiple pressure guide holes connected with the pressure chamber；Core pipe, its is mobile to be arranged in the outer barrel, and the upper end of the core pipe is connected with oil pipe, and the lower end of the core pipe is set The ball seat for setting ball can be blocked by having, and the core pipe is circumferentially arranged with multiple pressure transmission holes, in the pressure transmission hole and the pressure guide hole radial direction phase To in the state of, the core pipe is connected with the pressure chamber；Upper packer and lower packet, the upper packer are equipped with upper packing inner tube, institute in the lower section of the outer barrel and its State lower packet and lower packing inner tube, the upper packer and the lower packing are equipped with the lower section of the upper packer and its Sand blast sliding sleeve is equipped between device, the sand blast sliding sleeve is radially equipped with sand jet outlet, and the sand blast sliding sleeve is equipped with bridge passage vertically, The annular space between annular space, the lower packet and the lower packing inner tube between the upper packer and the upper packing inner tube Setting chamber is formed with the bridge passage, the setting chamber is connected with the pressure chamber.
- It is 2. according to claim 1 without throttling dual channel straddle test tubing string, it is characterised in that the core pipe is included from upper Pull rod, central tube and the setting pipe being sequentially connected under and, the upper end of the pull rod are connected with the oil pipe, and the pressure transmission hole is arranged on On the central tube, the lower end of the setting pipe is equipped with the ball seat of energy radial dilatation.
- 3. it is according to claim 2 without throttling dual channel straddle test tubing string, it is characterised in that the lower end of the pull rod with The upper end of the central tube is connected by contiguous block, and the outer barrel further includes cutting ferrule pipe, and the cutting ferrule pipe is connected to the pilot The top of outer tube, the upper end of the cutting ferrule pipe can be arranged in the contiguous block.
- 4. it is according to claim 2 without throttling dual channel straddle test tubing string, it is characterised in that the outer barrel with it is described on The first compound connecting pipe is equipped between packer, the first compound connecting pipe is compound including the first compound pilot outer tube and first Pilot inner tube, the first pilot passage is formed between the first compound pilot outer tube and the first compound pilot inner tube, described Pressure chamber is connected by the first pilot passage with the setting chamber.
- It is 5. according to claim 4 without throttling dual channel straddle test tubing string, it is characterised in that the first compound pilot The internal diameter of inner tube is more than the outside diameter of the setting pipe, is moved down in the core pipe and the ball seat of the setting pipe is multiple positioned at described first In the state of closing in pilot inner tube, the ball seat energy radial dilatation of the setting pipe.
- It is 6. according to claim 4 without throttling dual channel straddle test tubing string, it is characterised in that under the pilot outer tube End is connected by pressure guiding joint with the described first compound pilot outer tube, the lower end of the pilot inner tube by Flush coupling with it is described First compound pilot inner tube is connected, and the circumferentially spaced projection of the Flush coupling is multiple with the inner wall sealing of the pressure guiding joint The contact block of contact, the well washing hole through the Flush coupling and the pressure guiding joint, the pilot are equipped with the contact block The annular space connected with the pressure chamber is equipped between connector and the Flush coupling.
- It is 7. according to claim 4 without throttling dual channel straddle test tubing string, it is characterised in that the first compound pilot Seal nipple is equipped between pipe and the upper packer, between the upper packer and the sand blast sliding sleeve, the sealing connects Seal cartridge is equipped with head, the annular space between the seal nipple and the seal cartridge is connected with the setting chamber.
- It is 8. according to any one of claim 2 to 4 without throttling dual channel straddle test tubing string, it is characterised in that described The second compound connecting pipe is equipped between sand blast sliding sleeve and the lower packet, the second compound connecting pipe includes the second composite guide Outer tube and the second compound pilot inner tube are pressed, the is formed between the second compound pilot outer tube and the second compound pilot inner tube Two pilot passages, the second pilot passage are connected with the setting chamber.
- It is 9. according to claim 8 without throttling dual channel straddle test tubing string, it is characterised in that the second compound pilot Seal nipple is equipped between pipe and the lower packet, seal cartridge, the seal nipple and institute are equipped with the seal nipple The annular space stated between seal cartridge is connected with the setting chamber.
- It is 10. according to claim 1 without throttling dual channel straddle test tubing string, it is characterised in that in the sand blast sliding sleeve Equipped with cage, the perisporium of the cage is equipped with the through hole that multiple sand jet outlets with the sand blast sliding sleeve are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721267382.XU CN207229085U (en) | 2017-09-29 | 2017-09-29 | Without throttling dual channel straddle test tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721267382.XU CN207229085U (en) | 2017-09-29 | 2017-09-29 | Without throttling dual channel straddle test tubing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207229085U true CN207229085U (en) | 2018-04-13 |
Family
ID=61849992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721267382.XU Expired - Fee Related CN207229085U (en) | 2017-09-29 | 2017-09-29 | Without throttling dual channel straddle test tubing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207229085U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814639A (en) * | 2021-02-04 | 2021-05-18 | 广州海洋地质调查局 | Expansion type staged fracturing process pipe column and fracturing method |
-
2017
- 2017-09-29 CN CN201721267382.XU patent/CN207229085U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814639A (en) * | 2021-02-04 | 2021-05-18 | 广州海洋地质调查局 | Expansion type staged fracturing process pipe column and fracturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Yang Inventor after: Liao Rugang Inventor after: Ren Yong Inventor after: Wang Xiaojun Inventor after: Zhang Huaizhi Inventor after: Ren Ze Inventor before: Liu Yang Inventor before: Liao Rugang Inventor before: Ren Yong Inventor before: Wang Xiaojun Inventor before: Zhang Huaizhi Inventor before: Ren Ze |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180413 |