CN103114843A - Multi-layer section continuous oil testing system without tripping tubular column and operation method thereof - Google Patents
Multi-layer section continuous oil testing system without tripping tubular column and operation method thereof Download PDFInfo
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- CN103114843A CN103114843A CN2013100525880A CN201310052588A CN103114843A CN 103114843 A CN103114843 A CN 103114843A CN 2013100525880 A CN2013100525880 A CN 2013100525880A CN 201310052588 A CN201310052588 A CN 201310052588A CN 103114843 A CN103114843 A CN 103114843A
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Abstract
The invention relates to a multi-layer section continuous oil testing system without tripping a tubular column, which is connected in series with an underground test tubular column and comprises an upper subsystem, a plurality of layered test systems and a lower subsystem which are sequentially connected in series along the axial direction of the tubular column, wherein: the upper subsystem comprises a multi-circulating valve, a main test valve, a full-bore pressure gauge support cylinder, a safety joint and a top hydraulic packer which are sequentially connected in series along the axial direction of the pipe column; the layered testing systems are sequentially connected to the pipe column in series along the axial direction of the pipe column, each layered testing system corresponds to an oil layer, and each layered testing system comprises a hydraulic switch valve, a safety joint and a layered hydraulic packer which are sequentially connected in series; the lower subsystem comprises a hydraulic sliding sleeve, a pressure transmission joint and a monitoring pressure gauge which are sequentially connected in series along the axial direction of the tubular column. The system can complete a series of underground operation processes of multi-layer and multi-section continuous testing, yield increasing transformation and liquid drainage without pulling out the pipe column, and has the outstanding advantages of simple construction operation, convenient assembly, short construction period and the like.
Description
Technical field
The invention relates to a kind of Oil/gas Well multi-layer testing, injection and the tool of production, refer in particular to a kind of lower tubular column multi-section multi-layer continuous formation testing system and method for operating thereof of not rising.
Background technology
In formation testing (gas) well, there is the multi-openings interval need to obtain respectively oil test data, just need formation testing by layer.Traditional formation testing by layer mode adopts lower bridging plug or cementing plug will try layer and shuts, and then returns the top interval on successively and carries out formation testing, and formation testing is complete, also need bore cement plug when going into operation.Its shortcoming is repeatedly to rise lower tubular column, lower bridging plug (or cementing plug), and long construction period, speed is slow, expense is high, easily oil-gas Layer is polluted.
United States Patent (USP) NO.2006/0207764 discloses the example of a kind of multi-layer testing, injection, production system.This patent relates to a kind ofly can make a plurality of target zones by the assembly of follow-on test.Described assembly comprises a plurality of valves, and each valve can be cast in corresponding valve and activates by valve being activated object.Valve can be actuated into open mode in succession by predefined procedure, and after corresponding valve is actuated into open mode, well stimulation is tested or taked to different layers.But the related valve of this invention is upper and lower respectively one group of pressure tube line interface, need to come by the pressure transmission pipeline of parasitism during construction the operation of control valve, this structure make the tubing string assembling, rise, under become complex procedures, long construction period; The existence of pressure transmission pipeline makes tubing string that safety joint can't be installed, in case be difficult to when meeting card realize freeing safely.And the pressure transmission pipeline easily is damaged, unreliable, cause being constructed into power and reduce.So although this patent makes the down-hole multi-layer testing not need repeatedly to rise lower tubular column, it does not overcome the technical problems such as oil well test inefficiency, safety be low fully.
Chinese patent discloses a kind of underground ball throwing control switch valve No. 200920172899.X, its technology path is: when by pitching, the unlatching of oil pipe pressurized operation, guiding valve is descending under thrust, the guiding valve lower end promotes spring detent and drives motion arm, motion arm promotes the ball valve rotation by projection, ball valve is closed in realization, and guiding valve continues to come downwards to spring detent inside, until circulation port is opened.But there is following defective in this utility model on structure and principle: according to the explanation in this utility model specific embodiment, " ball valve close stroke be less than the stroke that circulation port is opened ", the ball valve that is to say the bottom are closed in before circulation port opens; And after in case ball valve closes, can prisoner be the incompressible formation " dead space " of liquid between the steel ball of two of up and down, namely guiding valve will be there will be no stroke, circulation port can not be opened, prisoner this, this utility model is impossible realization.In addition, even if this valve is through improving design, make " stroke that the ball valve stroke of closing is opened greater than circulation port ", in case at first circulation port is opened so, liquid stream will drain into the oil jacket annular space from circulation port, not only make hydraulic pressure die-off and can't continue to drive ball valve and close, also can make well liquid infiltrate the stratum, oil reservoir is polluted.
Summary of the invention
repeatedly play lower tubular column for what the traditional batch formation testing technology described in background technology existed, lower bridging plug (or cementing plug), long construction period, expense is high, easily cause the shortcoming of formation contaminant, and United States Patent (USP) arranges the problem that parasitic pressure transmission pipeline still affects downhole testing efficient, the object of the present invention is to provide a kind of lower tubular column multi-section multi-layer continuous formation testing system and method for operating thereof of not rising, this system and method for operating can not realize that lower tubular column just can complete multilayer multistage follow-on test, the volume increase transformation, the a series of underground work operations of discharge opeing, has constructing operation simple, easy to assembly, the outstanding advantages such as short construction period.
This purpose is to be realized by following technical scheme:
A kind of continuous formation testing of lower tubular column multi-section multi-layer system of not rising, be serially connected with on the downhole testing tubing string, the continuous formation testing of described multi-section multi-layer system comprises along upper subsystem, a plurality of zonal testing system and the lower subsystem of tubing string axial order serial connection, wherein: upper subsystem comprises along multiple-circulation valve, main testing valve, full-bore manometer, safety joint and the top hydraulic packer of tubing string axial order serial connection; A plurality of zonal testing system is serially connected with on tubing string along the tubing string axial order, each corresponding oil reservoir of zonal testing system, and each described zonal testing system comprises hydraulic switching valve, safety joint and the layering hydraulic packer of order serial connection, and hydraulic switching valve wherein is hydraulic switching valve as above; Lower subsystem comprises along hydraulic sliding sleeve, pressure-transmitting joint and the monitoring pressure meter of tubing string axial order serial connection.
The hydraulic switching valve of described zonal testing system, be connected on the downhole testing tubing string, described hydraulic switching valve is the hollow tubular body of a multilayer, radially has skin, intermediate layer and internal layer, and described skin is connected with top connection, transition joint, ball valve urceolus and lower contact vertically from top to bottom; Described intermediate layer has the hollow mandrel that is mounted slidably in described outer inboard, axle is fixed in transition joint by the axle shear pin, described intermediate layer also sequentially is provided with connection pawl, connecting short section, top race and bottom race in the axis extended line direction of axle lower end edge axle, offer two parallel grooves on the top race sidewall, the motion arm of two strips is embedded at respectively in described two parallel grooves, the bottom snapping of the top of motion arm and connecting short section; Described internal layer is provided with the ball seat body that the top can be sealed by the pitching card on axle inner chamber top, described internal layer is provided with the ball valve assembly in upper and lower seat ring, the ball valve assembly has upper ball base, lower ball base and is incorporated into ball valve in two ball seats, be provided with a spring between ball valve and upper ball base, and ball valve coordinates with the protruding operating side of motion arm; Wherein, described top connection is provided with the outer circulation hole, and described axle also is provided with interior circulation port and relief hole at the upside in described outer circulation hole, and the axial location of described relief hole is between described outer circulation hole and interior circulation port.
Whereby, by in axle, relief hole being set, make ball valve close liquid stream in rear spindle and can be slowly drain into the oil jacket annular space via relief hole and outer circulation hole, can not form background technology described " dead space ", thereby axle can further be pushed against downwards, until the inner-outer circulation hole is communicated with fully, overcome the existing underground ball throwing control switch valve described in background technology and can not realize closing the technical problem that is communicated with epimere after hypomere.
Preferably, the described outer circulation hole of above-mentioned hydraulic switching valve and the axial distance between interior circulation port are greater than the axial stroke of described ball valve; And the axial distance of described outer circulation hole and relief hole is less than or equal to the axial stroke of described ball valve.
Preferably, the described ball seat body of above-mentioned hydraulic switching valve is fixed in described axle inner chamber top by a ball seat body shear pin, and is used for cutting off the design shearing force of ball seat body shear pin greater than the design shearing force that is used for cutting off described axle shear pin.
Preferably, the described ball valve of above-mentioned hydraulic switching valve is provided with two potholes, and the protruding operating side with each motion arm fastens respectively; And described connecting short section lower end has a groove, and the upper end of described motion arm has projection, and the groove of this projection and connecting short section lower end fastens.
Preferably, the end face of the described ball seat body of above-mentioned hydraulic switching valve have one can with the sealing surface of pitching fitted seal tubing string inner chamber, and the bottom of ball seat body is equipped with a plurality of sealing rings; The outer wall of described axle within it between circulation port top, interior circulation port and this top connection outer circulation hole, this below, top connection outer circulation hole is equipped with the sealing ring that coordinates with the top connection inwall.
Preferably, the top of the described connection pawl of above-mentioned hydraulic switching valve utilizes elastic card in the lower end of described axle.
The continuous formation testing of multi-section multi-layer as above system, described layering hydraulic packer all is arranged between oil reservoir, and described hydraulic switching valve all is arranged at the oil reservoir place.
The continuous formation testing of multi-section multi-layer as above system is positioned at the diameter of ball seat body of hydraulic switching valve of described zonal testing system of below less than the diameter of the ball seat body of the hydraulic switching valve of the described zonal testing system that is positioned at the top.
The present invention also provides the above-mentioned method of operating that does not play the continuous formation testing of lower tubular column multi-section multi-layer system, comprises the steps:
Each layer of first step packing: with the continuous formation testing of described multi-section multi-layer system G.I.H, adjust tubing string, make this top hydraulic packer arrive projected depth, the dress well head is forced into the pressure that sets of setting in tubing string, set whole hydraulic packers, each layer of packing;
The formation testing of second step orlop: after setting, boost to the hydraulic sliding sleeve opening pressure of setting in tubing string, hydraulic sliding sleeve is opened, and links up the test layer of foot; Close main testing valve, adopt suction or coiled tubing lift mode to fall liquid level, until be down to the test pressure differential of setting; Operate main testing valve multiple switching by applied pressure by annulus, carry out the test of orlop oil reservoir;
The second layer formation testing of the 3rd step: the second layer is the oil reservoir that is adjacent to described orlop top; Lower floor's formation testing is closed main testing valve after finishing, and opens multiple-circulation valve, carries out replacing into fluid cushion in well-flushing, kill-job, oil pipe; After finishing for liquid, close multiple-circulation valve, open main testing valve, knock down in tubing string with corresponding to the corresponding ball of the hydraulic switching valve of described second layer oil reservoir, treat that ball enters the position, is forced into setting pressure, open this hydraulic switching valve, link up the top oil reservoir when closing the bottom oil reservoir; Close main testing valve, adopt suction or coiled tubing lift mode to fall liquid level, until be down to the test pressure differential of setting; Open main testing valve, operate main testing valve multiple switching by applied pressure by annulus, carry out second layer test;
The 4th step other layer formation testing: by the order that oil reservoir successively makes progress, repeated for the 3rd step and complete all formation testing by layers of each oil reservoir;
The 5th step kill-job, deblocking, lift pipe string: after completing whole layers of test, open multiple-circulation valve, carry out well-flushing, kill job; After kill-job finishes, tear well head open, direct upper lifting pipe post, classification, whole packers of deblocking successively will not play the continuous formation testing of lower tubular column multi-section multi-layer system and all trip out.
Method of operating as above, wherein said hydraulic sliding sleeve opening pressure is higher than the described pressure that sets.
Method of operating as above, wherein every one deck oil reservoir after test finishes, also can increase production transformation, discharge opeing, ask the product operation.
Method of operating as above, wherein from the described second layer, increase production as follows transformation, discharge opeing and ask the product operation: the ball seat body shear pin that pressurizes and cut off described hydraulic switching valve by oil pipe, open the injection channel and increase production transformation, discharge opeing, ask the product operation, until the current layer formation testing finishes.
By above technical scheme, the invention has the advantages that:
1. the continuous formation testing system architecture of multi-section multi-layer of the present invention is reasonable and compact, play that the lower tubular column constructing operation is convenient, the cycle is short, the well control risk is little, running string just can not need parasitic pressure transmission pipeline with whole instrument G.I.Hs yet, continuously, successively to each test layer test, the construction operations such as injection, discharge opeing, can realize down-hole multiple switching well during test, during deblocking, realize classification, whole packers of deblocking successively, need not play lower tubular column and just can complete the multilayer multistage and work continuously;
2. hydraulic switching valve of the present invention is by arranging relief hole in axle, make ball valve close liquid stream in rear spindle and can be slowly drain into the oil jacket annular space via relief hole and outer circulation hole, can not form background technology described " dead space ", thereby make the axle energy by further pushing and pressing downwards, until inner-outer circulation hole connection;
3. hydraulic switching valve of the present invention is provided with two-stage shear pin (ball seat body shear pin and axle shear pin), and the design shearing force of cutting off ball seat body shear pin is larger, hydraulic switching valve of the present invention can be sheared in classification, only cut off the axle shear pin when test, in pressure process, axle top is not communicated with inside and outside circulation port, makes flushing fluid can not drain into the oil jacket annular space, has avoided polluted reservoir; And when needs injected operation, ball seat body shear pin was cut off in pressurization, convenient follow-up injection process.
Description of drawings
Fig. 1 is the schematic diagram that the present invention does not play the continuous formation testing of lower tubular column multi-section multi-layer system;
Fig. 2 is the half sectional view of hydraulic switching valve of the present invention;
Fig. 3 is the local half sectional view in ball seat body part of hydraulic switching valve of the present invention;
Fig. 4 is the local half sectional view at the ball valve assembly part of hydraulic switching valve of the present invention.
The specific embodiment
For making purpose of the present invention, technological means and technique effect have more complete and clearly disclose, below be elaborated, and see also accompanying drawing and parts label.
The invention provides a kind of hydraulic switching valve of reasonable and compact in structure, as shown in Figure 2, its axial dimension of prisoner is longer, is its each several part structure of clear embodiment, and the spy amplifies the part of the ball seat body in Fig. 2 and ball valve assembly part as shown in Figure 3 and Figure 4 respectively.The below sees also Fig. 2～Fig. 4, hydraulic switching valve 1 of the present invention is connected on the downhole testing tubing string, it is the hollow tubular body of a multilayer, radially have skin, intermediate layer and internal layer, described skin is connected with top connection 101, transition joint 102, ball valve urceolus 103 and lower contact 104 vertically from top to bottom; Described intermediate layer has the hollow mandrel 105 that is mounted slidably in described outer inboard, axle 105 is fixed in transition joint 102 by axle shear pin 106, described intermediate layer also sequentially is provided with connection pawl 107, connecting short section 108, top race 111 and bottom race 112 in the axis extended line direction of axle 105 lower end edge axles, offer two parallel groove (not shown)s on top race 111 sidewalls, the motion arm 109 of two strips is embedded at respectively in described two parallel grooves, the bottom snapping of the top of motion arm 109 and connecting short section 108; Described internal layer is provided with the top on axle 105 inner chamber tops can be by the ball seat body 110 of pitching 130 card envelopes, described internal layer is provided with ball valve assembly 12 in upper and lower seat ring 111,112, ball valve assembly 12 has upper ball base 121, lower ball base 123 and is incorporated into ball valve 122 in two ball seats, 111 of ball valve 122 and upper ball bases are provided with a spring 124, and ball valve 122 coordinates with the protruding operating side 109a of motion arm 109; Wherein, described top connection 101 is provided with outer circulation hole 101a, described axle 105 also is provided with interior circulation port 105a and relief hole 113 at the upside of described outer circulation hole 101a, and the axial location of described relief hole 113 is between described outer circulation hole 101a and interior circulation port 105a.
Further, see also Fig. 3, the axial distance between described outer circulation hole 101a and interior circulation port 105a is greater than the axial stroke of described ball valve 122; And the axial distance of described outer circulation hole 101a and relief hole 113 is less than or equal to the axial stroke of described ball valve 122.Whereby, when axle 105 is descending, can at first link up relief hole 113 and outer circulation hole 101a carries out pressure release, can continue descending at pressure release effect lower spindle 105, and close ball valve 122, in being communicated with simultaneously, circulation port 105a and outer circulation hole 101a open the top circulation canal.
Please consult Fig. 2 and Fig. 3, described ball seat body 110 is fixed in described axle 105 inner chamber tops by a ball seat body shear pin 114, and is used for cutting off the design shearing force of ball seat body shear pin 114 greater than the design shearing force that is used for cutting off described axle shear pin 106 again.Whereby, can realize the pressurization after first cut off the axle shear pin, after cut off ball seat body shear pin.
Please consult Fig. 4, described ball valve 122 is provided with two pothole 122a again, and the protruding operating side 109a with each motion arm 109 fastens respectively, moves axially the motion conversion of rotating to ball valve 122 to realize axle 105; And described connecting short section 108 lower ends have groove 108a, the upper end of described motion arm 109 has protruding 109b, the groove 108a of this projection 109b and connecting short section 108 lower ends fastens, and can make the transmission of axial sinking campaign of axle more reliable and stable by the inlay card design.
Please consult again Fig. 3, the end face of described ball seat body 110 have one can with the sealing surface 110a of pitching 130 fitted seal tubing string inner chambers, and the bottom of ball seat body 110 is equipped with a plurality of sealing rings 115; The outer wall of described axle 105 within it between circulation port 105a top, interior circulation port 105a and this top connection 101 outer circulation hole 101a, three places, this top connection outer circulation hole 101a below are equipped with the sealing ring 116 that coordinates with top connection 101 inwalls, passes through from the gap so as to preventing that liquid from flowing.
Preferably, the top of described connection pawl 107 utilizes elastic card in the lower end of described axle 105.
The hydraulic switching valve of the invention described above, its operating principle is as follows:
Hydraulic switching valve and tubing string link together, and G.I.H when completing lower floor's test, when needing the test upper strata, drops into the ball of corresponding size from ground.After ball falls into corresponding ball seat body and seals its hypomere tubing string, the pressurization of epimere tubing string, pressure converts the downward thrust of center roller to and cuts off the axle shear pin; Under thrust, axle is descending, is positioned at the sealing ring 116 of top connection outer circulation hole upside by the outer circulation hole, then is communicated with relief hole and outer circulation hole, opens emptying passage; Axle continues descending, promotes to connect pawl, connecting short section drive motion arm, promotes the ball valve rotation by protruding operating side and realizes closing ball valve; It is descending that axle continues, and during to the terminal point of this stroke, be the range of the descending process of axle this moment, and the outer circulation hole of the interior circulation port of axle and top connection just is in aligned position, and the downside Channel Perfect is opened.When needs inject operation, rail is forced into over the design of ball seat body shear pin and cuts off pressure, when the pressure that the ball seat body is subject to is changed the position longitudinal thrust, cut off ball seat body shear pin, the ball seat body comes downwards to an interior step place of axle, all open the injection channel, can increase production transformation, discharge opeing operation.
The present invention also provides a kind of continuous formation testing of lower tubular column multi-section multi-layer system of not rising, as shown in Figure 1, be serially connected with on downhole testing tubing string 21, the continuous formation testing of described multi-section multi-layer system comprises along upper subsystem 200, a plurality of zonal testing system 300 and the lower subsystem 400 of tubing string 21 axial order serial connections, wherein: upper subsystem 200 comprises along multiple-circulation valve 22, main testing valve 23, full-bore manometer 24, safety joint 25 and the top hydraulic packer 26 of tubing string 21 axial order serial connections; A plurality of zonal testing system 300 is serially connected with on tubing string 21 along tubing string 21 axial order, each zonal testing system 300 corresponding oil reservoirs, and comprise hydraulic switching valve described above 1, safety joint 28 and the layering hydraulic packer 29 of order serial connection; Lower subsystem 400 comprises along hydraulic sliding sleeve 36, pressure-transmitting joint 37 and the monitoring pressure meter 38 of tubing string 21 axial order serial connections.
Preferably, described layering hydraulic packer 29 all is arranged between oil reservoir in order to each layer of packing, and described hydraulic switching valve 1 all is arranged at the oil reservoir place in order to be communicated with or to close current oil reservoir, as shown in Figure 1.
For realizing that each zonal testing system 300 successively closes by the pitching that drops into different-diameter from bottom to up, be positioned at the diameter of ball seat body 110 of hydraulic switching valve 1 of described zonal testing system 300 of below less than the diameter of the ball seat body 110 of the hydraulic switching valve 1 of the described zonal testing system 300 that is positioned at the top.
The present invention also provides the above-mentioned method of operating that does not play the continuous formation testing of lower tubular column multi-section multi-layer system, comprises the steps:
Each layer of first step packing: with the continuous formation testing of described multi-section multi-layer system G.I.H, adjust tubing string 21, make this top hydraulic packer 26 arrive projected depth, the dress well head, be forced into the pressure that sets of setting in tubing string, set whole hydraulic packers (comprising top hydraulic packer 26 and whole layering hydraulic packer 29), each layer of packing;
The formation testing of second step orlop: after setting, boost to the hydraulic sliding sleeve opening pressure of setting in tubing string, hydraulic sliding sleeve 36 is opened, and links up the test layer of foot; Close main testing valve 23, adopt suction or coiled tubing lift mode to fall liquid level, until be down to the test pressure differential of setting; Operate main testing valve 23 multiple switchings by applied pressure by annulus, carry out the test of orlop oil reservoir;
The second layer formation testing of the 3rd step: the second layer is the oil reservoir that is adjacent to described orlop top; Lower floor's formation testing is closed main testing valve 23 after finishing, and opens multiple-circulation valve 22, carries out replacing into fluid cushion in well-flushing, kill-job, oil pipe; After finishing for liquid, close multiple-circulation valve 22, open main testing valve 23, knock down in tubing string 21 with corresponding to the corresponding ball of the hydraulic switching valve 1 of described second layer oil reservoir, treat that ball enters the position, is forced into setting pressure, open this hydraulic switching valve 1, link up the top oil reservoir when closing the bottom oil reservoir; Close main testing valve 23, adopt suction or coiled tubing lift mode to fall liquid level, until be down to the test pressure differential of setting; Open main testing valve 23, operate main testing valve 23 multiple switchings by applied pressure by annulus, carry out second layer test;
The 4th step other layer formation testing: by the order that oil reservoir successively makes progress, repeated for the 3rd step and complete all formation testing by layers of each oil reservoir;
The 5th step kill-job, deblocking, lift pipe string: after completing whole layers of test, open multiple-circulation valve 22, carry out well-flushing, kill job; After kill-job finishes, tear well head open, direct upper lifting pipe post, classification, whole packers of deblocking successively will not play the continuous formation testing of lower tubular column multi-section multi-layer system and all trip out.
In the aforesaid operations method, described hydraulic sliding sleeve opening pressure is higher than the described pressure that sets.
In the aforesaid operations method, every one deck oil reservoir if necessary, can also increase production transformation, discharge opeing, ask the product operation after test finishes.
In the aforesaid operations method, from the described second layer, increase production as follows transformation, discharge opeing and ask the product operation: the ball seat body shear pin 114 that pressurizes and cut off described hydraulic switching valve 1 by oil pipe, be communicated with outer circulation hole 101a and interior circulation port 105a, open the injection channel and increase production transformation, discharge opeing, ask the product operation, until the current layer formation testing finishes.
The invention described above do not play lower tubular column multi-section multi-layer continuous formation testing system and method for operating thereof, can realize that fixed tubular column carries out successively formation testing, complete before the pressure of every one deck test, volume increase transformation and press after discharge opeing, ask the product operation.
Above for only being the schematic part embodiment of the present invention; be not to limit the scope of the invention; any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification are within all should being included in this patent protection domain.
Claims (7)
1. one kind is not played the continuous formation testing of lower tubular column multi-section multi-layer system, is serially connected with on the downhole testing tubing string, it is characterized in that, the continuous formation testing of described multi-section multi-layer system comprises along upper subsystem, a plurality of zonal testing system and the lower subsystem of tubing string axial order serial connection, wherein:
Upper subsystem comprises along multiple-circulation valve, main testing valve, full-bore manometer, safety joint and the top hydraulic packer of tubing string axial order serial connection;
A plurality of zonal testing system is serially connected with on tubing string along the tubing string axial order, each corresponding oil reservoir of zonal testing system, and each described zonal testing system comprises hydraulic switching valve, safety joint and the layering hydraulic packer of order serial connection;
Lower subsystem comprises along hydraulic sliding sleeve, pressure-transmitting joint and the monitoring pressure meter of tubing string axial order serial connection;
Wherein, the hydraulic switching valve of described zonal testing system is connected on the downhole testing tubing string, and be the hollow tubular body of a multilayer, this hydraulic switching valve radially has skin, intermediate layer and internal layer, and described skin is connected with top connection, transition joint, ball valve urceolus and lower contact vertically from top to bottom; Described intermediate layer has the hollow mandrel that is mounted slidably in described outer inboard, axle is fixed in transition joint by the axle shear pin, described intermediate layer also sequentially is provided with connection pawl, connecting short section, top race and bottom race in the axis extended line direction of axle lower end edge axle, offer two parallel grooves on the top race sidewall, the motion arm of two strips is embedded at respectively in described two parallel grooves, the bottom snapping of the top of motion arm and connecting short section; Described internal layer is provided with the ball seat body that the top can be sealed by the pitching card on axle inner chamber top, described internal layer is provided with the ball valve assembly in upper and lower seat ring, the ball valve assembly has upper ball base, lower ball base and is incorporated into ball valve in two ball seats, be provided with a spring between ball valve and upper ball base, and ball valve coordinates with the protruding operating side of motion arm; Described top connection is provided with the outer circulation hole, and described axle also is provided with interior circulation port and relief hole at the upside in described outer circulation hole, and the axial location of described relief hole is between described outer circulation hole and interior circulation port.
2. the continuous formation testing of multi-section multi-layer according to claim 1 system, is characterized in that, described layering hydraulic packer all is arranged between oil reservoir, and described hydraulic switching valve all is arranged at the oil reservoir place.
3. the continuous formation testing of multi-section multi-layer according to claim 1 system, it is characterized in that, be positioned at the diameter of ball seat body of hydraulic switching valve of described zonal testing system of below less than the diameter of the ball seat body of the hydraulic switching valve of the described zonal testing system that is positioned at the top.
4. a method of operating that does not play the continuous formation testing of lower tubular column multi-section multi-layer system as claimed in claim 1, comprise the steps:
Each layer of first step packing: with the continuous formation testing of described multi-section multi-layer system G.I.H, adjust tubing string, make this top hydraulic packer arrive projected depth, the dress well head is forced into the pressure that sets of setting in tubing string, set whole hydraulic packers, each layer of packing;
The formation testing of second step orlop: after setting, boost to the hydraulic sliding sleeve opening pressure of setting in tubing string, hydraulic sliding sleeve is opened, and links up the test layer of foot; Close main testing valve, adopt suction or coiled tubing lift mode to fall liquid level, until be down to the test pressure differential of setting; Operate main testing valve multiple switching by applied pressure by annulus, carry out the test of orlop oil reservoir;
The second layer formation testing of the 3rd step: the second layer is the oil reservoir that is adjacent to described orlop top; Lower floor's formation testing is closed main testing valve after finishing, and opens multiple-circulation valve, carries out replacing into fluid cushion in well-flushing, kill-job, oil pipe; After finishing for liquid, close multiple-circulation valve, open main testing valve, knock down in tubing string with corresponding to the corresponding ball of the hydraulic switching valve of described second layer oil reservoir, treat that ball enters the position, is forced into setting pressure, open this hydraulic switching valve, link up the top oil reservoir when closing the bottom oil reservoir; Close main testing valve, adopt suction or coiled tubing lift mode to fall liquid level, until be down to the test pressure differential of setting; Open main testing valve, operate main testing valve multiple switching by applied pressure by annulus, carry out second layer test;
The 4th step other layer formation testing: by the order that oil reservoir successively makes progress, repeated for the 3rd step and complete all formation testing by layers of each oil reservoir;
The 5th step kill-job, deblocking, lift pipe string: after completing whole layers of test, open multiple-circulation valve, carry out well-flushing, kill job; After kill-job finishes, tear well head open, direct upper lifting pipe post, classification, whole packers of deblocking successively will not play the continuous formation testing of lower tubular column multi-section multi-layer system and all trip out.
5. method of operating according to claim 4, wherein, described hydraulic sliding sleeve opening pressure is higher than the described pressure that sets.
6. method of operating according to claim 4, wherein, every one deck oil reservoir also increases production transformation, discharge opeing, asks the product operation after test finishes.
7. method of operating according to claim 6, wherein, from the described second layer, increase production as follows transformation, discharge opeing and ask the product operation:
By the ball seat body shear pin that oil pipe pressurizes and cuts off described hydraulic switching valve, open the injection channel and increase production transformation, discharge opeing, ask the product operation, until the current layer formation testing finishes.
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