CN102979496B - Coiled tubing multilayer fracturing acidizing process tubular column and use method thereof - Google Patents
Coiled tubing multilayer fracturing acidizing process tubular column and use method thereof Download PDFInfo
- Publication number
- CN102979496B CN102979496B CN201210458280.1A CN201210458280A CN102979496B CN 102979496 B CN102979496 B CN 102979496B CN 201210458280 A CN201210458280 A CN 201210458280A CN 102979496 B CN102979496 B CN 102979496B
- Authority
- CN
- China
- Prior art keywords
- bridging plug
- slips
- central tube
- tubing string
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 66
- 230000008569 process Effects 0.000 title abstract description 12
- 239000003129 oil well Substances 0.000 claims abstract description 18
- 230000008878 coupling Effects 0.000 claims abstract description 15
- 238000010168 coupling process Methods 0.000 claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 claims abstract description 15
- 238000012856 packing Methods 0.000 claims description 46
- 230000020477 pH reduction Effects 0.000 claims description 36
- 230000000712 assembly Effects 0.000 claims description 18
- 238000000429 assembly Methods 0.000 claims description 18
- 238000012546 transfer Methods 0.000 claims description 17
- 210000000078 claw Anatomy 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 4
- 239000010985 leather Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 14
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 8
- 239000004576 sand Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004904 shortening Methods 0.000 description 4
- 230000000638 stimulation Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The invention discloses a coiled tubing multilayer fracturing acidizing process tubular column and a use method thereof, wherein the use method comprises the following steps: the bridge plug is set in the lower oil layer of the oil well; the bridge plug is positioned at a preset position through the coupling positioner; the upper part of the releasing hand and the bridge plug can be connected in a dismounting way; the packer comprises a central pipe, an upper joint is arranged at the upper end of the central pipe, a packer rubber cylinder is sleeved at the lower part of the central pipe, a slip assembly is arranged between the packer rubber cylinder and the upper joint, and a sliding groove group in sliding fit with the slip assembly is axially arranged on the outer wall of the central pipe; the central pipe is driven to lift and lower by external force, so that the rail pin of the slip assembly slides along the sliding groove group in sequence to limit the lifting and lowering stroke of the central pipe, and the coupling positioner is driven to position, the bridge plug is set, the release is separated from the bridge plug, and the packer is set. The invention can realize the layer-by-layer fracturing of the thin interbed oil well, has simple working procedure and accurate positioning, improves the fracturing construction efficiency, shortens the well completion period and saves the oil testing period and the cost.
Description
Technical field
The present invention relates in a kind of oil development and apply process pipe string and the method that coiled tubing implements stimulation work, particularly relate to a kind of continuous oil pipe multi-layer fracturing acidification technique tubing string and method.
Background technology
At present, in field of oil development, for the demand of low cost multiple fracturing acid stimulation operation, adopt coiled tubing to carry out stimulation work, there is potentiality and advantage.Domestic coiled tubing kit imperfection, multiple fracturing process matching tubing string is in blank, the application of these factors restriction coiled tubing in Oil Field stimulation work.
The people such as Yin Congbin write articles " straight well multi-section multi-layer coiled tubing successively back-up sand fracturing technology is explored " (" natural gas technology ", volume Two in 2008, the 6th phase) describe one successively back-up sand technique, this technology utilization coiled tubing carries a packer that can repeatedly enable (fluid pressure type or expansion type), carry successively with set, deblocking, back-up sand cyclic process in implement successively pressure break.Its typical process flow is: step one: enter to wait the bottom of pressing interval under coiled tubing band packer, utilize artificial bottom of a well to detect accurately to locate from tape counter with coiled tubing, it is fracturing fluid base fluid that well killing fluid in oil pipe is replaced in direct circulation, unpacking packer (packing all upper stratas perforated interval), coiled tubing pressure break first floor; Step 2: removing seal for packer, on carry coiled tubing to the second and treat pressure layer (accurately locate), open sleeve gate, direct circulation load fluid (containing calculating back-up sand amount), base fluid compacting back-up sand section capable of circulation after sand sedimentation; Step 3: close sleeve gate, direct circulation unpacking packer, the coiled tubing pressure break second layer; Circulation second and third step, until pressure break complete need to press interval.
But existing continuous oil pipe multi-layer fracturing acidification technique tubing string and fracturing process still have some shortcomings part:
1, the accurate orientation problem of unresolved downhole tool;
2, accurate for back-up sand sand amount calculation requirement, and this construction technology operation is loaded down with trivial details;
3, completion period is long, and the distinctive quick completion advantage of coiled tubing is embodied.
Summary of the invention
The object of this invention is to provide one and can realize thin interbed oil well successively pressure break, operation is simple, accurate positioning, the continuous oil pipe multi-layer fracturing acidification technique tubing string of shortening completion period.
Another object of the present invention is to provide one can realize thin interbed oil well successively pressure break, operation is simple, accurate positioning, the continuous oil pipe multi-layer fracturing of shortening completion period using method.
For achieving the above object, the present invention proposes a kind of continuous oil pipe multi-layer fracturing acidification technique tubing string, and for oil well multiple fracturing, described tubing string comprises: bridging plug, there is the bridging plug slips and bridging plug packing element that can radially stretch, make described bridging plug set bottom oil layer in oil well; Collar locator, be connected to the bottom of described bridging plug, this collar locator has support claw radially flexible under elastic force effect, described support claw can fasten in the draw-in groove that formed in down-hole casing and casing coupling junction, makes described bridging plug be positioned precalculated position, down-hole by described collar locator; Give up, this is given up can the connection of dismounting with the top of described bridging plug, after described bridging plug has set, described in give up and to be separated with described bridging plug; Packer, comprise central tube, top connection is provided with in the upper end of described central tube, for connecting coiled tubing, lower contact is provided with in the lower end of described central tube, for the upper end of giving up described in connecting, packing element is arranged with in the bottom of described central tube, slip assemblies is provided with between described packing element and described top connection, track pin is provided with inside described slip assemblies, this track pin and vertically the chute group be opened on described central tube outer wall are slidably matched, thus drive described slip assemblies to slide along described chute group track; Described central tube is driven to raise and decentralize by external force, the track pin of described slip assemblies to be reciprocatingly slided displacement along many parallel slideways in described chute group successively, to limit the stroke that described central tube raises and decentralizes, and then drive that described collar locator is located, described bridging plug sets successively, described in give up and to be separated with described bridging plug, and described packer setting.
Continuous oil pipe multi-layer fracturing acidification technique tubing string as above, wherein, the described chute group axis comprised along described central tube offers many parallel described slideways, described slideway comprises long slideway and short slideway, between adjacent two described long slideways, be provided with two described short slideways, the upper end of slideway described in each is concordant and be connected.
Continuous oil pipe multi-layer fracturing acidification technique tubing string as above, wherein, described bridging plug comprises: bridging plug central tube, the described bridging plug slips be made up of upper slips and lower slips, and is arranged at the bridging plug packing element between described upper slips and described lower slips, described upper slips is connected with described lower end of giving up by a cone, described in give up by exert pressure to described cone drive described upper slips radially expand, described bridging plug is located, described lower slips is slidable to be set on described bridging plug central tube, the inner side of described lower slips is provided with slide rail pin, described bridging plug central tube corresponds to described slide rail pin and offers sliding-rail groove group, the described sliding-rail groove group axis comprised along described bridging plug central tube offers many parallel described sliding-rail grooves, described sliding-rail groove comprises long rail groove and short rail groove, a described short rail groove is provided with between adjacent two described long rail grooves, the lower end of the described sliding-rail groove of adjacent two is concordant and be connected, described slide rail pin slides along described sliding-rail groove group, when described slide rail pin slides into the upper end of described long rail groove, described lower slips is exerted pressure to described bridging plug packing element, described bridging plug packing element is driven radially to expand, described bridging plug is set.
Continuous oil pipe multi-layer fracturing acidification technique tubing string as above, wherein, described collar locator comprises: box cupling central tube; Box cupling top connection and box cupling lower contact, be arranged at the two ends of described box cupling central tube respectively; Described box cupling central tube is arranged with described support claw from top to bottom successively, and spring and positioning sleeve.
Continuous oil pipe multi-layer fracturing acidification technique tubing string as above, wherein, described giving up comprises: top connection of giving up, connecting rod is plugged with bottom the inside wall of described top connection of giving up, sheath is plugged with bottom the lateral wall of described top connection of giving up, spring is provided with between described connecting rod and described sheath, one end of described spring and the sidewall phase contact of described top connection of giving up, its other end and lower contact phase contact of giving up, in described connecting rod and the described upper slips of the slidable insertion of described lower contact of giving up, the lower end of described connecting rod can abut described cone.
Continuous oil pipe multi-layer fracturing acidification technique tubing string as above, wherein, described slip assemblies comprises: slips body, arranges towards described packing element; Track pin, is located at inside described slips body; Wiper block, is fixedly arranged on described slips body outer wall.
Continuous oil pipe multi-layer fracturing acidification technique tubing string as above, wherein, described packer is tension type packer.
Continuous oil pipe multi-layer fracturing acidification technique tubing string as above, wherein, described bridging plug is that leather cup type can drag for bridging plug.
Present invention also offers a kind of using method of continuous oil pipe multi-layer fracturing acidification technique tubing string as above, wherein, the method comprises the following steps:
Transfer the precalculated position of below tubing string to the bottom fractured layer of multiple fracturing oil well for the first time;
First time upper lifting pipe post, collar locator is fastened by the support claw radially expanded in the draw-in groove that formed in down-hole casing and casing coupling junction, makes described bridging plug be positioned precalculated position, down-hole by described collar locator;
Second time transfers tubing string, and the upper slips of bridging plug and lower slips pushing tow bridging plug packing element, make the expanded radially of bridging plug packing element, and to make bridging plug set in precalculated position, down-hole, simultaneously to applying hydraulic coupling of giving up, making to give up is tending towards with bridging plug departing from gradually;
Second time upper lifting pipe post, giving up is separated with bridging plug, makes to give up and packer is placed in more than bottom fractured layer and position below adjacent last layer fractured layer;
Third time transfers tubing string;
Third time upper lifting pipe post, make the slip assemblies pushing tow packing element of packer, make packing element expanded radially, to make packer setting more than bottom fractured layer and position below adjacent last layer fractured layer;
By the stroke raised and decentralized of the cut to lengthen tubing string of the parallel slideway of chute group, drive collar locator location successively, bridging plug sets, giving up is separated with described bridging plug, and packer setting, and then packing bottom fractured layer;
After fracture acidizing operation completes, deblocking packer, transfers tubing string and makes to give up and to be connected with bridging plug, deblocking bridging plug; Upper lifting pipe post is to well head again, completes the operation of bottom fractured layer, repeats above-mentioned steps, carries out operation, until the superiors' fractured layer, complete whole operation to last layer fractured layer.
The using method of continuous oil pipe multi-layer fracturing acidification technique tubing string as above, wherein, the described chute group axis comprised along described central tube offers many parallel described slideways, described slideway comprises long slideway and short slideway, between adjacent two described long slideways, be provided with two described short slideways, the upper end of the described slideway of adjacent two is concordant and be connected, described bridging plug comprises: the described bridging plug slips be made up of upper slips and lower slips, and is arranged at the bridging plug packing element between described upper slips and described lower slips, described upper slips is connected with described lower end of giving up by a cone, described in give up by exert pressure to described cone drive described upper slips radially expand, described bridging plug is located, described bridging plug slip sleeve be fixed in be connected to described upper slips lower end bridging plug central tube on, described lower slips is slidable to be set on described bridging plug central tube, the inner side of described lower slips is provided with slide rail pin, described bridging plug central tube corresponds to described slide rail pin and offers sliding-rail groove group, the described sliding-rail groove group axis comprised along described bridging plug central tube offers many parallel described sliding-rail grooves, described sliding-rail groove comprises long rail groove and short rail groove, a described short rail groove is provided with between adjacent two described long rail grooves, the lower end of the described sliding-rail groove of adjacent two is concordant and be connected,
First time, when transferring tubing string, track pin was positioned at the initial position of chute group upper end; Meanwhile, slide rail pin is positioned at the upper end of a short rail groove of sliding-rail groove group;
During first time upper lifting pipe post, track pin slides into the bottom of short slideway described in Article 1; Meanwhile, slide rail pin slides into the bottom of this short rail groove;
When second time transfers tubing string, track pin slides into the upper end of short slideway described in Article 2; Meanwhile, slide rail pin slides into the upper end of adjacent long rail groove;
During second time upper lifting pipe post, track pin slides into the bottom of short slideway described in Article 2;
Third time, when transferring tubing string, track pin slid into the upper end of described long slideway;
During third time upper lifting pipe post, track pin slides into the bottom of adjacent described long slideway.
Compared with prior art, the present invention has following characteristics and advantage:
1, the present invention is directed to thin interbed formation fracturing acidizing treatment and develop, this process pipe string by tension type packer, to give up and the instrument such as bridging plug, collar locator forms complete set enters well tool, first the well that enters adopting collar locator to carry out downhole tool is accurately located, then bridging plug, packer is set, packing construction layer position, carries out fracture acidizing construction; After this layer of construction terminates, application is given up and to be picked up by bridging plug, repeats above-mentioned operation and carries out upper strata fracture acidizing construction.The present invention can realize thin interbed oil well successively pressure break, have that operation is simple, accurate positioning, the advantage of shortening completion period.
2, the using method of continuous oil pipe multi-layer fracturing of the present invention is different from conventional oil pipe fracturing work, can implement successively pressure break under no killing well condition, implements the successively pressure break of more than four layers; Can tension type packer, the leather cup type bridging plug of repeatedly Reusability, save the activity duration, improve fracture acidizing efficiency of construction, shorten completion period; Formation testing cycle and cost are greatly saved.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit scope disclosed by the invention by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping the understanding of the present invention, are not the shape and the proportional sizes that specifically limit each parts of the present invention.Those skilled in the art under the teachings of the present invention, can select various possible shape and proportional sizes to implement the present invention as the case may be.
Fig. 1 is the decomposition texture schematic diagram of the continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention each several part of first time when transferring;
Fig. 2 is the decomposition texture schematic diagram of each several part on continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention first time when carrying;
Fig. 3 is the packer construction schematic diagram of continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention second time when transferring;
Fig. 4 is packer in continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention second time when carrying, give up and the decomposition texture schematic diagram of bridging plug;
Fig. 5 is the continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention packer construction schematic diagram of third time when transferring;
Fig. 6 is the packer construction schematic diagram on continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention third time when carrying.
Fig. 7 is the structural representation of the chute group of packer of the present invention;
Fig. 8 is the structural representation of the sliding-rail groove group of bridging plug of the present invention;
Fig. 9 is the structural representation of continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention G.I.H in use;
Figure 10 be continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention in use bridging plug with give up the structural representation after being separated;
Figure 11 is continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention carries out operation in use structural representation to last layer fractured layer.
Description of reference numerals:
1-packer; 10-track pin; 11-wiper block; 12-slips body; 13-central tube; 14-cone; 15-packing element; 16-positioning sleeve; 17-lower contact; 18-top connection;
2-gives up; 20-gives up top connection; 21-sheath; 22-spring; 23-connecting rod; 24-gives up lower contact; 25-sheath; 26-slips housing; 27-cone; 28-overcurrent ring; 29-spheroid;
3-bridging plug; 30-upper slips; 31-connector; 32-adapter sleeve; 33-bridging plug packing element; 34-cone; 35-lower slips; 36-wiper block; 37-slide rail pin; 38-bridging plug central tube;
4-collar locator; The top connection of 41-box cupling; 42-body; 43-support claw; 44-spring leaf; 45-staple; 46-box cupling central tube; 47-spring; 48-positioning sleeve; The lower contact of 49-box cupling;
5-chute group; The long slideway of 51-; The short slideway of 52-; The short slideway of 521-Article 1; The short slideway of 522-Article 2;
6-sliding-rail groove group; The long rail groove of 61-; The short rail groove of 62-.
Detailed description of the invention
By reference to the accompanying drawings with the description of the specific embodiment of the invention, can clearly understand details of the present invention.But the specific embodiment of the present invention described here, only for explaining object of the present invention, and can not to be understood as by any way be limitation of the present invention.Under the teachings of the present invention, technician can conceive based on distortion possible arbitrarily of the present invention, and these all should be regarded as belonging to scope of the present invention.
Please refer to Fig. 1 to Fig. 6, be respectively continuous oil pipe multi-layer fracturing acidification technique tubing string of the present invention decomposition texture schematic diagram and repeatedly below and promote time decomposition texture schematic diagram.As shown in the figure, the continuous oil pipe multi-layer fracturing acidification technique tubing string that the present invention proposes, for oil well multi-layer fracturing operation, this tubing string comprises: the packer 1 be from top to bottom linked in sequence, give up 2, bridging plug 3 and collar locator 4.Bridging plug 3 has the bridging plug slips (upper slips 30 and lower slips 35) and bridging plug packing element 33 that can radially stretch, upper slips 30 and lower slips 35 radially expand stopper on sleeve under the driving of external force, bridging plug 3 is located, and clamp bridging plug packing element 33 by upper slips 30 and lower slips 35, bridging plug 3 is made to set bottom oil layer in oil well, the position namely below operation oil reservoir lower surface.Collar locator 4 is connected to the bottom of bridging plug 3, this collar locator 4 has support claw 43 radially flexible under elastic force effect, support claw 43 can fasten in the draw-in groove that formed in down-hole casing and casing coupling junction, thus collar locator 4 is located, and then making bridging plug 3 be positioned precalculated position, down-hole by collar locator 4, this precalculated position is collar locator 4 and sets setting position below operation oil reservoir lower surface.Giving up 2 can the connection of dismounting with the top of bridging plug 3, after bridging plug 3 has set, give up and 2 to be separated with bridging plug 3, make the packer 1 on tubing string top and give up 2 to be separated with the bridging plug 3 of tubing string bottom and collar locator 4, make packer 1 is carried to its predetermined setting position; After a fractured layer operation completes, give up and 2 transfer and can again connect with bridging plug 3, bridging plug 3 and collar locator 4 are salvaged.Packer 1 comprises central tube 13, top connection 18 is provided with in the upper end of central tube 13, for connecting coiled tubing, lower contact 17 is provided with in the lower end of central tube 13, for connect give up 2 upper end, be arranged with packing element 15 in the bottom of central tube 13, between packing element 15 and top connection 18, be provided with slip assemblies, slip assemblies comprises: slips body 12, arranges towards packing element 15; Track pin 10, is located at inside slips body 12; Wiper block 11, is fixedly arranged on slips body 12 outer wall.The track pin 10 of slip assemblies and the chute group 5 (as shown in Figure 8) be opened on central tube 13 outer wall are vertically slidably matched, thus drive slip assemblies to slide along chute group 5 track.Central tube 13 is driven to raise and decentralize by external force, the track pin 10 of slip assemblies to be reciprocatingly slided displacement along many parallel slideways in chute group 5 successively, to limit the stroke that central tube 10 raises and decentralizes, and then drive that collar locator 4 is located, bridging plug 3 sets, giving up 2 is separated with bridging plug 3 successively, and packer 1 sets, realize packing to assignment oil reservoir, realize thin interbed oil well successively pressure break, have that operation is simple, accurate positioning, the beneficial effect of shortening completion period.
As shown in Figure 7, be the structural representation of the chute group of packer of the present invention.In the present invention, the axis that chute group 5 comprises centrally pipe 13 offers many parallel slideways, slideway comprises long slideway 51 and short slideway 52, between adjacent two long slideways 51, be provided with two short slideways 52, the upper end of each slideway (comprising long slideway 51 and short slideway 52) is concordant and be connected.Like this, process pipe string is carried in the process with below, slided in short slideway 52 and long slideway 51 successively by track pin 10, the stroke that restriction central tube 10 raises and decentralizes, and then drive collar locator 4, bridging plug 3, give up 2, corresponding component action in packer 1, realize thin interbed oil well successively pressure break.
As shown in Figure 1, bridging plug 3 comprises: bridging plug central tube 38, the bridging plug slips be made up of upper slips 30 and lower slips 35, and is arranged at the bridging plug packing element 33 between upper slips 30 and lower slips 35.Upper slips 30 by a cone 27 with give up 2 lower end connect, in use, transfer tubing string, track pin 10 is descending along short slideway 52, to 2 applying hydraulic couplings of giving up, drives upper slips 30 radially to expand by cone 27, upper slips 30 is fastened on the sleeve of down-hole, realizes bridging plug 3 and locate, lower slips 35 is slidable to be set on bridging plug central tube 38, the inner side of lower slips 35 is provided with slide rail pin 37, bridging plug central tube 38 corresponds to slide rail pin 37 and offers sliding-rail groove group 6, as shown in Figure 8, sliding-rail groove group 6 axis comprised along bridging plug central tube 38 offers many parallel sliding-rail grooves, sliding-rail groove comprises long rail groove 61 and short rail groove 62, a short rail groove 62 is provided with between adjacent two long rail grooves 61, the lower end of the sliding-rail groove of adjacent two is concordant and be connected, slide rail pin 37 slides along sliding-rail groove group track, when slide rail pin 37 slides into the upper end of long rail groove 61, lower slips 35 is exerted pressure to bridging plug packing element 33, bridging plug packing element 33 is driven radially to expand, bridging plug 3 is set.Bridging plug 3 adopts leather cup sealing member, and fluid power sets, and avoids ballast to set, packing bottom oil layer.
As shown in Figure 1, collar locator 4 comprises: box cupling central tube 46; Box cupling top connection 41 and box cupling lower contact 49, be arranged at the two ends of box cupling central tube 46 respectively; Box cupling central tube 46 is arranged with support claw 43 from top to bottom successively, and spring 47 and positioning sleeve 48.The support claw 43 of collar locator 4 fastens in the draw-in groove that formed in down-hole casing and casing coupling junction, thus is located by collar locator 4, and collar locator 4 concrete structure and operating principle are prior art, are not described in detail at this.Collar locator 4 enters to make a reservation for below transformation oil reservoir under coordinating tubing string of the present invention by coiled tubing, upper lifting pipe post, the support claw 43 of bottom collar locator 4 enters in casing coupling space, oil pipe is made to produce the additional tension of about 3 tons, by contrasting with log data, with this box cupling degree of depth for benchmark, that accurately locates downhole tool enters well depth; Whether this instrument instruction is simultaneously given up throws off with tubing string.
As shown in Fig. 1,2,4, of the present invention giving up 2 comprises: top connection 20 of giving up, connecting rod 23 is plugged with bottom the inside wall of top connection 20 of giving up, sheath 21 is plugged with bottom the lateral wall of top connection 20 of giving up, spring 22 is provided with, one end of spring 22 and the sidewall phase contact of top connection 20 of giving up, its other end and lower contact 24 phase contact of giving up between connecting rod 23 and sheath 25, connecting rod 23 and giving up in the slidable insertion upper slips 30 of lower contact 24, the lower end of connecting rod 23 can abut cone 27.To give up 2 employing hydraulic releasing modes, bridging plug 3 can be inserted after putting aside and achieve a butt joint, bridging plug 3 is pulled out in well.
Please also refer to Fig. 9 to Figure 11, present invention also offers the using method of above-mentioned continuous oil pipe multi-layer fracturing acidification technique tubing string, this process pipe string by tension type packer 1, give up 2, bridging plug 3, collar locator 4 etc. form.Tubing string, with below coiled tubing G.I.H precalculated position, above carries coiled tubing, and collar locator 4 blocks casing coupling, and weight indicator produces 2-3 ton suspending weight to be increased, thus the well that enters carrying out downhole tool is accurately located; Then set bridging plug 3, destroy and give up 2; On carry packer 1 to precalculated position, set packer 1, packing construction layer position, carries out fracture acidizing construction; After this layer of construction terminates, application is given up and 2 to be picked up by bridging plug 3, repeats above-mentioned operation and carries out upper strata fracture acidizing construction.The concrete steps of the method are as follows:
Step 1: as shown in Figure 1, transfers the precalculated position of below tubing string to the bottom fractured layer of multiple fracturing oil well for the first time; Now, the track pin 10 of packer 1 is arranged in the initial position (i.e. Fig. 7 A place) of chute group 5 upper end; Meanwhile, the slide rail pin 37 of bridging plug 3 is arranged in the upper end (i.e. Fig. 8 a place) of a short rail groove of sliding-rail groove group 6;
Step 2: as shown in Figure 2, first time upper lifting pipe post, collar locator 4 is fastened by the support claw 43 radially expanded in the draw-in groove that formed in down-hole casing and casing coupling junction, makes bridging plug 3 be positioned precalculated position, down-hole by collar locator 4; Now, track pin 10 slides into the bottom (i.e. B place in Fig. 7) of the short slideway 521 of Article 1 along the short slideway of Article 1 521; Meanwhile, slide rail pin 37 slides into the bottom (i.e. b place in Fig. 8) of this short rail groove 62 along above-mentioned short rail groove 62;
Step 3: as shown in Figure 3, second time transfers tubing string, the upper slips 30 of bridging plug 3 and lower slips 35 pushing tow bridging plug packing element 33, make bridging plug packing element 33 expanded radially, to make bridging plug 3 set in precalculated position, down-hole, simultaneously to 2 applying hydraulic couplings of giving up, making to give up 2 is tending towards departing from bridging plug 3 gradually; Now, track pin 10 slides into the upper end (i.e. C place in Fig. 7) of the short slideway 522 of Article 2 along the short slideway of Article 1 521; Meanwhile, slide rail pin 37 slides into the upper end (i.e. c place in Fig. 8) of this long rail groove 61 along adjacent long rail groove 61;
Step 4: second time upper lifting pipe post, giving up 2 is separated with bridging plug 3, make to give up 2 and packer 1 be placed in more than bottom fractured layer and position below adjacent last layer fractured layer; Track pin 10 slides into the bottom (i.e. D place in Fig. 7) of the short slideway 522 of Article 2 along the short slideway of Article 2 522;
Step 5: third time transfers tubing string; Now, track pin 10 slides into the upper end (i.e. E place in Fig. 7) of long slideway 51 along the short slideway of Article 2 522;
Step 6: upper lifting pipe post for the third time, makes the slip assemblies pushing tow packing element 15 of packer 1, make packing element 15 expanded radially, with the position making packer 1 set below last layer fractured layer more than bottom fractured layer and adjacent; Track pin 10 slides into the bottom (i.e. F place in Fig. 7) of adjacent long slideway 51.
By the stroke raised and decentralized of the cut to lengthen tubing string of the parallel slideway of chute group, drive that collar locator 4 is located, bridging plug 3 sets, giving up 2 is separated with bridging plug 3 successively, and packer 1 sets, and then packing bottom fractured layer; After fracture acidizing operation completes, deblocking packer, transfers tubing string and makes to give up and 2 to be connected with bridging plug 3, deblocking bridging plug 3; Upper lifting pipe post is to well head again, completes the operation of bottom fractured layer, repeats above-mentioned steps, carries out operation, until the superiors' fractured layer, complete whole operation to last layer fractured layer.
The present invention utilizes coiled tubing belt tension formula packer, can drag for bridging plug implements successively pressure break, by packer, bridging plug to the layer of card up and down of fractured interval, coiled tubing fluid transfer and proppant is utilized to carry out pressure break, repeat deblocking and set packer, bridging plug and successively on carry coiled tubing, recycling positioner is accurately located and is treated pressure break reservoir, thus realize thin interbed oil well successively pressure break, give full play to the advantage of continuous oil pipe operation equipment.Application coiled tubing coordinates this process pipe string, can carry out multiple fracturing acidizing treatment to oil well random layer position is unrestricted.
For the detailed explanation of the respective embodiments described above, its object is only to make an explanation to the present invention, so that the present invention can be understood better, but, it is limitation of the present invention that these descriptions can not become with any explanation, particularly, each feature described in various embodiments also can be combined mutually, thus form other embodiments, except there being clearly contrary description, these features should be understood to can be applied in any one embodiment, and are also not only confined to described embodiment.
Claims (10)
1. a continuous oil pipe multi-layer fracturing acidification technique tubing string, for oil well multiple fracturing, is characterized in that, described tubing string comprises:
Bridging plug, has the bridging plug slips and bridging plug packing element that can radially stretch, and makes described bridging plug set bottom oil layer in oil well;
Collar locator, be connected to the bottom of described bridging plug, this collar locator has support claw radially flexible under elastic force effect, described support claw can fasten in the draw-in groove that formed in down-hole casing and casing coupling junction, makes described bridging plug be positioned precalculated position, down-hole by described collar locator;
Give up, this is given up can the connection of dismounting with the top of described bridging plug, after described bridging plug has set, described in give up and to be separated with described bridging plug;
Packer, comprise central tube, top connection is provided with in the upper end of described central tube, for connecting coiled tubing, lower contact is provided with in the lower end of described central tube, for the upper end of giving up described in connecting, packing element is arranged with in the bottom of described central tube, slip assemblies is provided with between described packing element and described top connection, track pin is provided with inside described slip assemblies, this track pin and vertically the chute group be opened on described central tube outer wall are slidably matched, thus drive described slip assemblies to slide along described chute group track;
Described central tube is driven to raise and decentralize by external force, the track pin of described slip assemblies to be reciprocatingly slided displacement along many parallel slideways in described chute group successively, to limit the stroke that described central tube raises and decentralizes, and then drive that described collar locator is located, described bridging plug sets successively, described in give up and to be separated with described bridging plug, and described packer setting.
2. continuous oil pipe multi-layer fracturing acidification technique tubing string as claimed in claim 1, it is characterized in that, the described chute group axis comprised along described central tube offers many parallel described slideways, described slideway comprises long slideway and short slideway, between adjacent two described long slideways, be provided with two described short slideways, the upper end of slideway described in each is concordant and be connected.
3. continuous oil pipe multi-layer fracturing acidification technique tubing string as claimed in claim 2, it is characterized in that, described bridging plug comprises: bridging plug central tube, the described bridging plug slips be made up of upper slips and lower slips, and is arranged at the bridging plug packing element between described upper slips and described lower slips, described upper slips is connected with described lower end of giving up by a cone, described in give up by exert pressure to described cone drive described upper slips radially expand, described bridging plug is located, described lower slips is slidable to be set on described bridging plug central tube, the inner side of described lower slips is provided with slide rail pin, described bridging plug central tube corresponds to described slide rail pin and offers sliding-rail groove group, the described sliding-rail groove group axis comprised along described bridging plug central tube offers many parallel described sliding-rail grooves, described sliding-rail groove comprises long rail groove and short rail groove, a described short rail groove is provided with between adjacent two described long rail grooves, the lower end of the described sliding-rail groove of adjacent two is concordant and be connected, described slide rail pin slides along described sliding-rail groove group, when described slide rail pin slides into the upper end of described long rail groove, described lower slips is exerted pressure to described bridging plug packing element, described bridging plug packing element is driven radially to expand, described bridging plug is set.
4. continuous oil pipe multi-layer fracturing acidification technique tubing string as claimed in claim 3, it is characterized in that, described collar locator comprises:
Box cupling central tube;
Box cupling top connection and box cupling lower contact, be arranged at the two ends of described box cupling central tube respectively;
Described box cupling central tube is arranged with described support claw from top to bottom successively, and spring and positioning sleeve.
5. continuous oil pipe multi-layer fracturing acidification technique tubing string as claimed in claim 3, it is characterized in that, described giving up comprises: top connection of giving up, connecting rod is plugged with bottom the inside wall of described top connection of giving up, sheath is plugged with bottom the lateral wall of described top connection of giving up, spring is provided with between described connecting rod and described sheath, one end of described spring and the sidewall phase contact of described top connection of giving up, its other end and lower contact phase contact of giving up, in described connecting rod and the described upper slips of the slidable insertion of described lower contact of giving up, the lower end of described connecting rod can abut described cone.
6. continuous oil pipe multi-layer fracturing acidification technique tubing string as claimed in claim 1, it is characterized in that, described slip assemblies comprises:
Slips body, is arranged towards described packing element;
Track pin, is located at inside described slips body;
Wiper block, is fixedly arranged on described slips body outer wall.
7. continuous oil pipe multi-layer fracturing acidification technique tubing string as claimed in claim 1, it is characterized in that, described packer is tension type packer.
8. continuous oil pipe multi-layer fracturing acidification technique tubing string as claimed in claim 1, it is characterized in that, described bridging plug is that leather cup type can drag for bridging plug.
9. a using method for the continuous oil pipe multi-layer fracturing acidification technique tubing string according to any one of claim 1 to 8, it is characterized in that, the method comprises the following steps:
Transfer the precalculated position of below tubing string to the bottom fractured layer of multiple fracturing oil well for the first time;
First time upper lifting pipe post, collar locator is fastened by the support claw radially expanded in the draw-in groove that formed in down-hole casing and casing coupling junction, makes described bridging plug be positioned precalculated position, down-hole by described collar locator;
Second time transfers tubing string, and the upper slips of bridging plug and lower slips pushing tow bridging plug packing element, make the expanded radially of bridging plug packing element, and to make bridging plug set in precalculated position, down-hole, simultaneously to applying hydraulic coupling of giving up, making to give up is tending towards with bridging plug departing from gradually;
Second time upper lifting pipe post, giving up is separated with bridging plug, makes to give up and packer is placed in more than bottom fractured layer and position below adjacent last layer fractured layer;
Third time transfers tubing string;
Third time upper lifting pipe post, make the slip assemblies pushing tow packing element of packer, make packing element expanded radially, to make packer setting more than bottom fractured layer and position below adjacent last layer fractured layer;
By the stroke raised and decentralized of the cut to lengthen tubing string of the parallel slideway of chute group, drive collar locator location successively, bridging plug sets, giving up is separated with described bridging plug, and packer setting, and then packing bottom fractured layer;
After fracture acidizing operation completes, deblocking packer, transfers tubing string and makes to give up and to be connected with bridging plug, deblocking bridging plug; Upper lifting pipe post is to well head again, completes the operation of bottom fractured layer, repeats above-mentioned steps, carries out operation, until the superiors' fractured layer, complete whole operation to last layer fractured layer.
10. the using method of continuous oil pipe multi-layer fracturing acidification technique tubing string as claimed in claim 9, it is characterized in that, the described chute group axis comprised along described central tube offers many parallel described slideways, described slideway comprises long slideway and short slideway, between adjacent two described long slideways, be provided with two described short slideways, the upper end of the described slideway of adjacent two is concordant and be connected, described bridging plug comprises: the described bridging plug slips be made up of upper slips and lower slips, and is arranged at the bridging plug packing element between described upper slips and described lower slips, described upper slips is connected with described lower end of giving up by a cone, described in give up by exert pressure to described cone drive described upper slips radially expand, described bridging plug is located, described bridging plug slip sleeve be fixed in be connected to described upper slips lower end bridging plug central tube on, described lower slips is slidable to be set on described bridging plug central tube, the inner side of described lower slips is provided with slide rail pin, described bridging plug central tube corresponds to described slide rail pin and offers sliding-rail groove group, the described sliding-rail groove group axis comprised along described bridging plug central tube offers many parallel described sliding-rail grooves, described sliding-rail groove comprises long rail groove and short rail groove, a described short rail groove is provided with between adjacent two described long rail grooves, the lower end of the described sliding-rail groove of adjacent two is concordant and be connected,
First time, when transferring tubing string, track pin was positioned at the initial position of chute group upper end; Meanwhile, slide rail pin is positioned at the upper end of a short rail groove of sliding-rail groove group;
During first time upper lifting pipe post, track pin slides into the bottom of short slideway described in Article 1; Meanwhile, slide rail pin slides into the bottom of this short rail groove;
When second time transfers tubing string, track pin slides into the upper end of short slideway described in Article 2; Meanwhile, slide rail pin slides into the upper end of adjacent long rail groove;
During second time upper lifting pipe post, track pin slides into the bottom of short slideway described in Article 2;
Third time, when transferring tubing string, track pin slid into the upper end of described long slideway;
During third time upper lifting pipe post, track pin slides into the bottom of adjacent described long slideway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210458280.1A CN102979496B (en) | 2012-11-14 | 2012-11-14 | Coiled tubing multilayer fracturing acidizing process tubular column and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210458280.1A CN102979496B (en) | 2012-11-14 | 2012-11-14 | Coiled tubing multilayer fracturing acidizing process tubular column and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102979496A CN102979496A (en) | 2013-03-20 |
| CN102979496B true CN102979496B (en) | 2015-06-03 |
Family
ID=47853815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210458280.1A Active CN102979496B (en) | 2012-11-14 | 2012-11-14 | Coiled tubing multilayer fracturing acidizing process tubular column and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102979496B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626022B (en) * | 2014-11-05 | 2018-09-25 | 中国石油化工股份有限公司 | Oil/gas well tubular column unit and the method for asking production for carrying out oil/gas well |
| CN104533329B (en) * | 2015-01-15 | 2016-12-28 | 新疆罡拓能源科技有限公司 | One can proceed to well tie-back sleeve device |
| CN106285610B (en) * | 2015-05-11 | 2018-08-17 | 中国石油化工股份有限公司 | Fracturing string |
| CN105545255B (en) * | 2015-12-31 | 2018-05-04 | 中国石油天然气股份有限公司 | Novel long-acting oil-separating production pipe column for oil field |
| CN105507845B (en) * | 2015-12-31 | 2018-05-04 | 中国石油天然气股份有限公司 | Long-acting oil-separating packer for oil field |
| CN108729906A (en) * | 2018-06-07 | 2018-11-02 | 西南石油大学 | A kind of hypotonic tight gas reservoir improvement backward modified isochronal test method |
| CN109736734B (en) * | 2019-01-10 | 2020-12-29 | 中国海洋石油集团有限公司 | Selective pass type press-down positioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0021589A1 (en) * | 1979-06-11 | 1981-01-07 | The Dow Chemical Company | Retrievable bridge plug tool and method for plugging off a well casing therewith |
| CN101560875A (en) * | 2009-05-18 | 2009-10-21 | 中国石油辽河油田钻采工艺研究院 | Multifunctional horizontal well completion tubular pile device |
| CN102562019A (en) * | 2011-12-13 | 2012-07-11 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Sand jet perforation annular mechanical packing multilayer fracturing tool pipe column and modification process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7350582B2 (en) * | 2004-12-21 | 2008-04-01 | Weatherford/Lamb, Inc. | Wellbore tool with disintegratable components and method of controlling flow |
-
2012
- 2012-11-14 CN CN201210458280.1A patent/CN102979496B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0021589A1 (en) * | 1979-06-11 | 1981-01-07 | The Dow Chemical Company | Retrievable bridge plug tool and method for plugging off a well casing therewith |
| CN101560875A (en) * | 2009-05-18 | 2009-10-21 | 中国石油辽河油田钻采工艺研究院 | Multifunctional horizontal well completion tubular pile device |
| CN102562019A (en) * | 2011-12-13 | 2012-07-11 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Sand jet perforation annular mechanical packing multilayer fracturing tool pipe column and modification process |
Non-Patent Citations (2)
| Title |
|---|
| 连续油管喷砂射孔套管分段压裂新技术的现场应用;钱斌等;《开发工程》;20110520;第31卷(第5期);第68页第1栏第3段，图1 * |
| 连续管喷砂射孔分段压裂工具的研究与应用;宁袆等;《石油机械》;20121110;第40卷(第11期);第95页第1栏第3段至第97页第1栏第1段，图1-7 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102979496A (en) | 2013-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102979496B (en) | Coiled tubing multilayer fracturing acidizing process tubular column and use method thereof | |
| CN104929603B (en) | Infinite stage sectional fracturing method for casing | |
| CN102691493B (en) | Continuous oil pipe sectional sand-blasting perforation casing fracturing pipe column and casing fracturing method | |
| US10920531B2 (en) | Wellbore isolation while placing valves on production | |
| WO2014088701A3 (en) | Stabilized fluids in well treatment | |
| AU2013314271B2 (en) | Drop device | |
| CN107489405A (en) | Coiled tubing drags abrasive perforating and the method for annular space back-up sand staged fracturing | |
| CN105443101A (en) | Compression type double-sealing and single-clamping subsection fracturing process pipe column and fracturing method thereof | |
| CN103061733A (en) | Sleeve valve type fracturing production-increasing tool | |
| CN206319872U (en) | Completion multistage fracturing counts sliding sleeve | |
| CN102733776A (en) | Fishable tubing plug | |
| CN202531159U (en) | On-site pressure testing device for hydraulic blowout preventer | |
| CN103696718A (en) | Double-clamp sleeve layered packing repair device and method for long-section casing damage well expansion pipe | |
| CN202202829U (en) | Continuous oil well tubing device | |
| CN203008874U (en) | Lining used for gravel filling tool | |
| CN110359896B (en) | Double-branch well fracturing process method | |
| CN204457594U (en) | Bridge plug | |
| CN210714647U (en) | Well cementation well completion tubular column toe end sliding sleeve | |
| CN102943655A (en) | Rotary location tool | |
| CN2929164Y (en) | Fishable cement transfer device for branch well and horizontal well | |
| CN206681700U (en) | Gradually deblocking packer | |
| CN203081322U (en) | Oil field underground torque transmission telescopic pipe | |
| CN102966337B (en) | A kind of lining on gravel pack tools | |
| CN205477572U (en) | Coiled tubing underseal drags multilayer annular space fracturing instrument cluster | |
| CN206071502U (en) | Running and fishing tool and oil field running and fishing pipe column thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |