CN103266875B - A kind of multi-stage water power sprays the fracture job method of fracturing strings - Google Patents
A kind of multi-stage water power sprays the fracture job method of fracturing strings Download PDFInfo
- Publication number
- CN103266875B CN103266875B CN201310063446.4A CN201310063446A CN103266875B CN 103266875 B CN103266875 B CN 103266875B CN 201310063446 A CN201310063446 A CN 201310063446A CN 103266875 B CN103266875 B CN 103266875B
- Authority
- CN
- China
- Prior art keywords
- sliding sleeve
- tool
- nozzle
- construction
- sprays
- 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.)
- Expired - Fee Related
Links
- 239000007921 spray Substances 0.000 title claims abstract description 160
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000010276 construction Methods 0.000 claims abstract description 89
- 238000005553 drilling Methods 0.000 claims abstract description 38
- 238000003825 pressing Methods 0.000 claims abstract description 24
- 238000011010 flushing procedure Methods 0.000 claims abstract description 12
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 238000012856 packing Methods 0.000 claims description 83
- 239000012530 fluid Substances 0.000 claims description 53
- 238000002347 injection Methods 0.000 claims description 39
- 239000007924 injection Substances 0.000 claims description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 239000004576 sand Substances 0.000 claims description 21
- 230000002159 abnormal effect Effects 0.000 claims description 18
- 239000003292 glue Substances 0.000 claims description 18
- 238000003672 processing method Methods 0.000 claims description 18
- 238000013461 design Methods 0.000 claims description 17
- 230000000704 physical effect Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- 230000003628 erosive effect Effects 0.000 claims description 9
- 230000003292 diminished effect Effects 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000011022 operating instruction Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 15
- 239000010410 layer Substances 0.000 description 15
- 230000008569 process Effects 0.000 description 13
- 239000000956 alloy Substances 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 238000005507 spraying Methods 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000008859 change Effects 0.000 description 6
- 238000007596 consolidation process Methods 0.000 description 6
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- JPNWDVUTVSTKMV-UHFFFAOYSA-N cobalt tungsten Chemical compound [Co].[W] JPNWDVUTVSTKMV-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 3
- 230000000638 stimulation Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 101100175010 Caenorhabditis elegans gbf-1 gene Proteins 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of multi-stage water power and spray the fracture job method of fracturing strings, comprise S1: multi-stage water power sprays fracturing strings advanced person before going into the well and to work well, well-flushing; S2: assembly multi-stage water power sprays fracturing strings; S3: lower brill, adjustment drilling tool is to construction location; S4: install well head and surface line, and pressure testing; This fracture job method is simple, the ground number of plies of acid fracturing as required can connect multi-stage jet isolating tool, pressing crack construction is carried out to Different Strata, therefore, can realize drilling through for one time the mode dragging tubing string at present to realize 6 sections or jetting more than 6 sections and pressure break connection and construct, the serial connection of multi-stage jet isolating tool can accelerate speed of application greatly, saves the engineering time.
Description
Technical field
The present invention relates to a kind of fracture job method that multi-stage water power sprays fracturing strings, for the completion well stimulation of oil and gas well drilling process, relate to acid fracturing construction tool design and manufacturing technology field.
Background technology
Jetting segmentation renovation technique be grow up the end of the nineties, foreign applications technology more widely, it is the product that jetting and fracturing technique combine, be beam hole, Hydro Fracturing Stimulation Treatment technique and one-trip string realize the technology of horizontal well multistage construction, this technology can carry out pressure break under the multiple completion mode such as bore hole, cement consolidation sleeve pipe, non-consolidation screen casing, compare with packer, bridging plug, back-up sand, plug technology mode, efficiency of construction can be greatly improved.Jetting staged fracturing know-why is that pressure energy is changed into kinetic energy, be greater than the high-speed jet of 126m/s through the jet velocity that nozzle is spouting after oil pipe pressurized with fluid, jet becomes seam in the earth formation, after hydraulic jet perforation, then discharge capacity is improved, in the well of penetrating perforate top and the bottom, produce negative pressure value form isolation, high-velocity fluid forms hole in formation rock, directly act on bottom hole, produce the pressure gesture higher than formation fracture pressure, produce a crack in the earth formation, then sand fracturing.
Realizing the technology of horizontal well multistage construction in order to implement one-trip string, just needing to adopt a kind of multi-stage water power to spray the fracture job method of fracturing strings.According to technical literature retrieval situation, the situation relevant to this technology is as follows:
1. adopt the fixed tubular column jetting staged fracturing technique of pitching sliding sleeve technology, method for fracturing composite pipe column through hydraulic jetting in segmented mode domestic literature that spray gun sliding sleeve is opened in ball-off, pitching has been reported.
2. adopt the fixed tubular column jetting segmented multi-level fracturing tool of shift sleeve structure, adopt the packer of sliding sleeve+backwash passage etc. optimize structure+the single multilayer pressure break QHY341 packer development of gradually deblocking and application domestic literature have been reported, but not mentioned alternative sets, the technology contents of the packer that has shift sleeve structure and fluid course to control.
3. what arrange anti-" sand plug " of backwash sliding sleeve in pump barrel bottom returns discharge fracturing fluid tubing string, fracturing string not easily sand card+sandblasting body inner sliding sleeve+can the pressure break of press seal+step by step the pilot sand-blast packer domestic literature of a fixed tubular column pressure break multilayer of multistage use+passage have been reported step by step fast.
4. the sand jet perforator backwash-proof erosion structure of water domestic literature that spray gun and nozzle surface carry out the jetting separate stratum fracfturing instrument of antirust treatment, nozzle installs external surface and sealing positioning sleeve front end face and nozzle install external surface coating thickness 1mm cemented carbide powder wear-resistant coating has been reported.
Publication number is CN202500541U, publication date is that the Chinese patent literature on October 24th, 2012 discloses a kind of gas well straight well multilevel hierarchy fracturing technology tubing string, integrated with combination producing and design for realizing the multistage several separate stratum fracfturing transformation of gas well straight well, namely tubing string connects safety joint, multi-level throttle sandblaster, packer and sleeve base with oil pipe; Wherein throttling sandblaster, packer and sleeve base are close to each other; Hydraulic anchor is connected to below throttling sandblaster; Throttling sandblaster at different levels and the oil pipe being connected different length between higher level's sleeve base according to interlamellar spacing.This process pipe string, by constantly repeating " pitching-skidding cover ", realizes multistage separate stratum fracfturing transformation, finally closes layer and asks product.Multilevel hierarchy fracturing reform is integrated with combination producing, can reduce conventional dividing potential drop flow chart, shortens construction period, reduces development operation cost, reduces the injury to reservoir, improves reservoir vertical producing degree.
The defect of the prior art being representative with above-mentioned patent document is:
1. conventional fixed tubular column multi-stage water power spray technology tubing string is opened waterpower spray gun step by step mainly through the mode of pitching open sliding sleeve and is carried out perforating and fracturing connection and do, carry out in jetting and pressing crack construction at multistage, because tubing string is long, also to prevent sand card, so should not packer be increased between spray gun, hydraulic jet self compartmentation can only be utilized to produce Inter-zonal packing, therefore, interlayer interference may be there is in construction between multilayer, at present this type tubing string can fixed tubular column hydraulic jetting fracturing more than 12 sections, but need the airbrush tool with progression, tool pipe string is long, oil well uses, construction cost is relatively high, and it is little to control dynamics to interlayer interference.
2. jetting and pressure break combination operation process have become long and have celebrated the Main Means transformed on block oil well horizontal well stratum, it is beam hole, Hydro Fracturing Stimulation Treatment technique, one-trip string realizes the construction of horizontal well multistage, pressure break can be carried out under the multiple completion mode such as bore hole, cement consolidation sleeve pipe, non-consolidation screen casing, compare with other technology mode (packer, bridging plug, back-up sand, plug), efficiency of construction is greatly improved.But be limited to nozzle material and packer performance, to construct more than 3 sections, need to change tubing string, increase operating cost and duty cycle, economic benefit and social benefit have disadvantageous one side.
3. adopt single-stage spray gun band packer to carry out hydraulic jetting fracturing connection to do, limit by nozzle material performance, monomer spray gun uses continuously and likely can lose efficacy because of the excessive spray gun that causes of wearing and tearing for more than 2 hours, packer also may cause seal failure because of repeatedly setting, can only construct at present 3 sections, if design and construct more than 6 sections, then need to pull out of hole and change drilling tool, add construction operation cycle and operating cost.
Summary of the invention
For solving the technical problem that above-mentioned prior art exists, the present invention proposes a kind of fracture job method that multi-stage water power sprays fracturing strings, this fracture job method is simple, the ground number of plies of acid fracturing as required can connect multi-stage jet isolating tool, pressing crack construction is carried out to Different Strata, therefore, can realize drilling through for one time the mode dragging tubing string at present to realize 6 sections or jetting more than 6 sections and pressure break connection and construct, the serial connection of multi-stage jet isolating tool can accelerate speed of application greatly, saves the engineering time.
The present invention realizes by adopting following technical proposals:
Multi-stage water power sprays a fracture job method for fracturing strings, it is characterized in that step is as follows:
S1: multi-stage water power sprays fracturing strings advanced person before going into the well and to work well, well-flushing;
S2: assembly multi-stage water power sprays fracturing strings;
S3: lower brill, adjustment drilling tool is to construction location;
S4: install well head and surface line, and pressure testing;
S5: according to the infusion program construction first paragraph of pressing crack construction design, complete the rear oil pipe open flow of construction, help row with 600L/min reacting cycle after spray gesture weakens;
S6: adjustment drilling tool position, makes ejector face toward the second segment specking of design, then according to infusion program construction second segment, adjusts drilling tool by after S5 step open flow after completing construction, repeats this step, until judge tool failures;
S7: drop into steel ball from well head, build the pressure in oil pipe 8 ~ 12MPa, cut off shear pin fixing between gun body and sliding sleeve, sliding sleeve comes downwards to sliding sleeve and is located joint, blocking lower passage, open the fluid hole of spray gun and the inlet opening of packer on Water jet packing tool simultaneously, packing element due to spray gun throttling action expansion packing element set, the oil jacket annular space of packing bottom; Water jet packing tool eyelet place forms jet, and Casing-Cutting wall and stratum pore-forming, then carry out pressing crack construction;
S8: after open flow has recoiled, adjustment drilling tool, to lower floor's construction location, drops into steel ball (preventing steel ball open flow process from discharging with returning discharge opeing, impact construction) from well head and carries out lower floor's construction, until tool failures, pull out of hole and change drilling tool;
S9: repeat above-mentioned S2-S8 step, until complete all construction intervals;
Spray fracturing strings opening multi-stage water power, when implementing the spray gun abrasive perforating in S5, S6, S7 and S8 step, oil pressure occur abnormal higher, oil pressure when first should check contrast interval physical property and abrasive perforating,
(1) if physical property is close between interval, and the expulsion pressure of each interval is all abnormal higher, and cover to release liquid normal, then predicate stratum reason, and non-tool reason, processing method now: continue construction when not superpressure;
(2) if physical property is close between interval, but it is large to spray oil pressure between interval, and otherness is abnormal higher, then judge that nozzle is by foreign matters from being blocked or sand plug, processing method now: should check and timely regulates liquid glue connection ratio, guarantee that glue connection is good, timely anti-flushing well de-plugging.
There is oil pressure when opening spray gun abrasive perforating abnormal on the low side, first contrasting with last layer section expulsion pressure, if expulsion pressure obviously reduces, be judged to be that nozzle erosion is serious, processing method now:
(1) according to operating instruction, the next one " injection unit " of opener string or the inspection replacing instrument that pulls out of hole;
(2) there is breaking point in multi-stage water power injection fracturing strings, and trip-out is checked.
In described S2 step, assembly multi-stage water power sprays the mode of fracturing strings: the hydraulic centralizing device that every one-level spraycan of multi-stage jet instrument includes a Water jet packing tool and is connected with Water jet packing tool, every one-level spraycan joins end to end, Water jet packing tool in first order spraycan is connected with righting ball-and-seat, righting ball-and-seat connects eye pipe and guiding plug successively, the afterbody spraycan of multi-stage jet instrument connects safety joint, connected pipes in safety joint, until well head.
Described Water jet packing tool comprises spray gun, packer and sliding sleeve and is located joint, one end of packer connects spray gun, the other end of packer connects sliding sleeve and is located joint, sliding sleeve is provided with in spray gun, the internal diameter of described sliding sleeve is reducing, be located joint direction from spray gun toward sliding sleeve, the inwall of described sliding sleeve is that the three-stage structure diminished successively by internal diameter is formed, and is provided with ball seat in sliding sleeve.
Described spray gun outer wall runs through and is provided with shear pin, and the outer wall of sliding sleeve is provided with the shear pin groove coordinated with described shear pin, and sliding sleeve is fixed through shear pin and described spray gun.
Described spray gun comprises gun body, nozzle cage and nozzle, gun body two ends are respectively top connection and lower contact, gun body is provided with injection hydrophthalmia, nozzle cage is arranged on and sprays in hydrophthalmia, nozzle is arranged in nozzle cage, nozzle outer surface and nozzle cage front end face are provided with topping, and the gun body outer wall of described injection hydrophthalmia surrounding is provided with topping; Sliding sleeve is arranged in the inner chamber of spray gun, and sliding sleeve and spray gun inner chamber are that interference fits is connected; Described sliding sleeve is located joint and comprises that sliding sleeve is located upper end of joint, sliding sleeve is located joint lower end and sliding sleeve is located joint baffle; Described packer comprises packing element and is arranged at the central tube in packing element, packing element upper end is connected with upper glue tube base, packing element lower end is connected with lower rubber cylinder seat, gun body upper end connected pipes, gun body lower end is connected with upper glue tube base respectively at described central tube upper end, lower rubber cylinder seat is connected with packer lower contact upper end with central tube lower end, and packer lower contact lower end is located upper end of joint with sliding sleeve and is connected, and sliding sleeve is located joint lower end and is located joint baffle with sliding sleeve and is connected.
Gun body inwall between sliding sleeve and gun body is disposed with the first fluid course and second fluid course of indent, the first fluid course communicates with nozzle.
Described second fluid course communicates with the 3rd fluid course, and the 3rd fluid course is axially disposed within gun body lower end along gun body, and the 3rd fluid course communicates with packing element upper end.
Described hydraulic centralizing device comprises centralizer body, centering edge and wiper block, centering edge has mounting groove, wiper block is arranged on mounting groove from centralizer body to outer embedding, described centralizer body inwall is arranged with elasticity sand-proof pipe, and the connectivity part of the closed front mounting groove of elasticity sand-proof pipe and centralizer body inner chamber.
The length of described elasticity sand-proof pipe is greater than the diameter at mounting groove and centralizer body inner space place, and the outer wall of elasticity sand-proof pipe is connected with centralizer body inner thread.
Described safety joint comprises top connection, lower contact, safety joint body, locking tile, locking sliding sleeve and hollow shear pin, described top connection, safety joint body are connected successively with lower contact, locking sliding sleeve is arranged among safety joint body, and locking sliding sleeve is fixed on safety joint body through hollow shear pin, described locking tile is the terraced structure being arranged on safety joint inner body wall, and locking tile coordinates with locking sliding sleeve.
Described multi-stage jet instrument comprises two-stage, and first order spraycan connects second level spraycan, and second level spraycan connects safety joint.
Described multi-stage jet instrument comprises three grades, and first order spraycan connects the second spraycan, and second level spraycan connects third level spraycan, and third level spraycan connects safety joint.
Described nozzle outer surface and the equal surfacing matcoveredn of nozzle cage front end face, and surfacing matcoveredn on the gun body outer wall of described injection hydrophthalmia surrounding.
The topping of described nozzle cage front end face extends on the gun body outer wall of injection hydrophthalmia surrounding, and the gun body outer wall spraying hydrophthalmia surrounding forms topping.
On described gun body 2 outer wall, the topping of surfacing covers whole gun body 2 outer wall.
Described topping is prefabricated component, is welded on nozzle outer surface, nozzle cage front end face respectively and sprays on the gun body outer wall of hydrophthalmia surrounding.
Whole gun body outer wall is covered after prefabricated component welding on described gun body outer wall.
Described nozzle is provided with 3-9, and diameter is 3.5mm-6.5mm.
Described nozzle and nozzle cage integrally welded, nozzle cage and gun body are threaded connection.
Described nozzle is the tungsten-cobalt hard alloy nozzle that hardness reaches HRA90.
Described nozzle is nickel base alloy nozzle or tungsten carbide nozzle.
Described topping can be tungsten carbide topping or carbide alloy topping.
Described wiper block and elasticity sand-proof pipe outer wall closely cooperate.
The external diameter of described centering edge is greater than the external diameter of centralizer body.
In a particular application, the specification of the three sections of internal diameters diminished successively is respectively: 28mm, 32mm and 35mm.
When carrying out horizontal section pressing crack construction, because the PSK344-110 Water jet packing device upper end of spraying isolating tool at most upper level is connected with external upset tubing, the effect that can play is:
The waterpower spray gun arranged can carry out pressure break under the multiple completion mode such as bore hole, cement consolidation sleeve pipe, non-consolidation screen casing, load fluid in tubing string flows through the nozzle injection of waterpower spray gun, when the flow velocity of load fluid stream reaches Metal Cutting speed, casing wall is penetrated out by high speed load fluid stream, and penetrate layer of turning up the soil, efficiency of construction is greatly improved.
The wiper block that the centering edge of hydraulic centralizing device is arranged, starts grappling by fluid power effect, reaches the object of hydraulic seat card, can reduce string creep, improve the efficiency of packer life-span and abrasive perforating, and the inner sand control cover arranged, reduces sand card risk.After construction terminates pressure release, upper lifting pipe post, can make wiper block regain, and can play the effect tripping out smoothly and change drilling tool.
The lower contact of safety joint and body firm linking together under locking tile with the effect of locking sliding sleeve, whole safety joint is sealing, can ensure normally carrying out of construction.When needing safety joint to slip out of the hand after having constructed, can from pitching in oil pipe, small displacement builds the pressure, and force locking sliding sleeve to shift out locked position downwards, safety joint unlocks, and plays the object of the oil pipe tripping out more than drilling tool.
Spray gun can be made to bear five sections of hydraulic perforations and pressing crack construction at the carbide alloy of the external surface spraying plating in gun body top nozzle hole, significantly reduce injection sand and the backwash of nozzle bore is injured, effectively raise the safety that instrument uses.
Compared with prior art, the beneficial effect that reaches of the present invention is as follows:
1, in the present invention, S1-S9 is adopted to amount to the fracture job method of 9 steps, fracture job method is simple, the ground number of plies of acid fracturing as required can connect multi-stage jet isolating tool, pressing crack construction is carried out to Different Strata, realizes 6 sections or jetting more than 6 sections and pressure break connection construct therefore, it is possible to realize drilling through for one time the mode dragging tubing string, the serial connection of multi-stage jet isolating tool can accelerate speed of application greatly, saves the engineering time.
2, in the present invention, the S8 step of employing, after open flow has recoiled, adjustment drilling tool, to lower floor's construction location, having dropped into steel ball from well head, can having prevented steel ball in open flow process from discharging with returning discharge opeing, impact construction.
3, in the present invention, opening multi-stage water power injection fracturing strings, when implementing the spray gun abrasive perforating in S5, S6, S7 and S8 step, there is oil pressure abnormal higher, should first check contrast interval physical property and abrasive perforating time oil pressure, for the different processing method that different situations adopts, the working condition that multi-stage water power sprays fracturing strings can be understood at any time, grasp the using state of tubing string, thus implement to continue construction or reconcile liquid glue connection ratio, be conducive to ensureing effectively carrying out of whole fracture job.
4, in the present invention, employing " there is oil pressure when opening spray gun abrasive perforating abnormal on the low side; first contrast with last layer section expulsion pressure; if expulsion pressure obviously reduces; be judged to be that nozzle erosion is serious; processing method now: (1), according to operating instruction, the next one " injection unit " or the trip-out of opener string check replacing instrument; (2) multi-stage water power sprays fracturing strings and occurs breaking point, pulls out of hole and checks " such technical scheme, can real-time judgment nozzle erosion situation, check or the instrument of replacing to pull out of hole at any time.
5, in the present invention, adopt " the hydraulic centralizing device that every one-level spraycan of multi-stage jet instrument includes a Water jet packing tool and is connected with Water jet packing tool, every one-level spraycan joins end to end, Water jet packing tool in first order spraycan is connected with righting ball-and-seat, righting ball-and-seat connects eye pipe and guiding plug successively, the afterbody spraycan of multi-stage jet instrument connects safety joint " such frame mode, because tubular column structure connects form by overlapping pressure break tool string more, structure is simple, the ground number of plies of acid fracturing as required can connect multi-stage jet isolating tool, pressing crack construction is carried out to Different Strata, therefore, can realize drilling through for one time the mode dragging tubing string at present to realize 6 sections or jetting more than 6 sections and pressure break connection and construct, the serial connection of multi-stage jet isolating tool can accelerate speed of application greatly, save the engineering time.
6, in the present invention, adopt at " be provided with sliding sleeve in spray gun; the internal diameter of described sliding sleeve is reducing; be located joint direction from spray gun toward sliding sleeve, the inwall of described sliding sleeve is that the three-stage structure diminished successively by internal diameter is formed, and is provided with ball seat in sliding sleeve " such frame mode, therefore, the sliding sleeve of different interior latus rectum is fitted over corresponding position, during construction, throws the steel ball of different size as required, just can open corresponding multi-stage water power and spray fracturing tool.
7, in the present invention, adopt the frame mode that " run through at spray gun outer wall and be provided with shear pin; the outer wall of sliding sleeve is provided with the shear pin groove coordinated with described shear pin, and sliding sleeve is fixed through shear pin and described spray gun " is such, shear pin is stuck in the shear pin groove of sliding sleeve, therefore, sliding sleeve can be limited under without the effect of external force to move down, reach safety and complete the water conservancy that a layer is and spray pressure break, when needs to the second level carry out water conservancy spray pressure break time, as long as cast setting steel ball, under the promotion of pressure.Steel ball promotes sliding sleeve and moves down, and opens the spray gun sealed by sliding sleeve, and the water conservancy that just can realize the second level sprays pressure break, the like, just can complete the construction that multi-stage water power sprays pressure break.
8, in the present invention, packer is made up of packing rubber sleeve, because packing element is flexible, there is flexible packing element can expand under stress, tightly be attached on the borehole wall, play the packing effect with other layer of position, when the water conservancy in an enforcement layer position sprays pressure break, to ensure that other layer of position can not be ganged up.
9, in the present invention, three fluid courses of design, first fluid course can ensure after opening that highly pressurised liquid carries out jetting by the stratum of nozzle to setting, second fluid course and the 3rd fluid course can ensure that highly pressurised liquid leads to packing element upper end after opening, and promote packing element distortion by packing element upper end, realize the packing to layer position.
10, in the present invention, because sliding sleeve is arranged in the inner circle of spray gun, and fixed by shear pin, sliding sleeve energy shutoff nozzle and fluid course simultaneously after fixing, so a ball can be reached open spray gun and packer simultaneously, such shift sleeve structure and fluid course design, achieve abrasive perforating, mechanical packing integration, effectively can reduce the risk brought because instrument is complicated in construction.
11, in the present invention, described centralizer body inwall is arranged with elasticity sand-proof pipe, and the connectivity part of the closed front mounting groove of elasticity sand-proof pipe and centralizer body inner chamber, adopt this structure, under the pressure effect of intraluminal fluid power, promote elasticity sand-proof pipe, because elasticity sand-proof pipe has elasticity, therefore under stress, elasticity sand-proof pipe is expanded in mounting groove, outside promotion wiper block, reach the object of hydraulic seat card, and due to the closed front mounting groove of elasticity sand-proof pipe and the connectivity part of centralizer body inner chamber, grit in liquid can not be entered in mounting groove, wiper block can not be blocked by sand, effectively can reduce sand card risk.
12, in the present invention, the length of described elasticity sand-proof pipe is greater than the diameter at mounting groove and centralizer body inner space place, when this structure makes elasticity sand-proof pipe expand in mounting groove under the effect of intraluminal fluid pressure, elasticity sand-proof pipe two ends and centralizer body inwall also can be connected firmly, ensure that the reliability at elasticity sand-proof pipe closed communication place, and the outer wall of elasticity sand-proof pipe is connected with centralizer body inner thread, employing is threaded and is not only easy for installation and removal, but also is convenient to adjust the position of elasticity sand-proof pipe in centralizer body.
13, in the present invention, spray gun comprises gun body, nozzle cage and nozzle, gun body two ends are respectively top connection and lower contact, gun body is provided with injection hydrophthalmia, nozzle cage is arranged on and sprays in hydrophthalmia, nozzle outer surface and nozzle cage front end face are provided with topping, and the gun body outer wall of described injection hydrophthalmia surrounding is provided with topping, adopt this structure, because nozzle outer surface and nozzle cage front end face are provided with topping, can effectively prevent sand jet perforator in the backwash erosion of sandblasting procedures, therefore, it is possible to ensure that multi-stage hydraulic sprays the multi-stage hydraulic injection fracture acidizing technology that fracturing string implements design, and on the gun body outer wall of described injection hydrophthalmia surrounding, be provided with topping, can ensure that gun body has the backwash erosion better preventing sandblasting procedures, ensure that multi-stage hydraulic sprays completing smoothly of fracture acidizing technology.
Accompanying drawing explanation
Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, wherein:
Fig. 1 is two-stage injection fracturing string structural representation;
Fig. 2 is three grades and sprays fracturing string structural representation;
Fig. 3 is safety joint detailed construction schematic diagram;
In Fig. 1-3: 31, lead plug, 32, eye pipe, 33, righting ball-and-seat, 34, packer, 35, spray gun, 36, hydraulic centralizing device, 37, Water jet packing tool, 39, safety joint, 391, safety joint top connection, 392, safety joint body, 393, locking tile, 394, locking sliding sleeve, 395, hollow shear pin, 396, safety joint lower contact;
Fig. 4 is the structural representation of Water jet packing tool;
Fig. 5 is A-B section enlarged diagram in Fig. 4;
Fig. 6 is B-C section enlarged diagram in Fig. 4;
Fig. 7 is C-D section enlarged diagram in Fig. 4;
In Fig. 4-7: 1, gun body upper end; 2, gun body; 3, shear pin; 4, the first fluid course; 5, nozzle; 6, steel ball; 7, O RunddichtringO; 8, sliding sleeve; 9, the second fluid course; 10, the 3rd fluid course; 11, gun body lower end; 12, II type O RunddichtringO; 13, central tube upper end; 14, upper glue tube base; 15, packing element upper end; 16, packing element; 17, central tube; 18, packing element lower end; 19, lower rubber cylinder seat; 20, central tube lower end; 21, III type O RunddichtringO; 22, packer lower contact upper end; 23, packer lower contact; 24, packer lower contact lower end; 25, sliding sleeve is located upper end of joint; 26, sliding sleeve is located joint; 27, sliding sleeve is located joint lower end; 28, sliding sleeve is located joint baffle;
Fig. 8 is spray gun structure schematic diagram;
Be labeled as in Fig. 8: 41, top connection, 2, gun body, 43, spray hydrophthalmia, 5, nozzle, 45, nozzle cage, 46, topping, 47, lower contact;
Fig. 9 is hydraulic centralizing device structural representation;
Be labeled as in Fig. 9: 51, centralizer body, 52, centering edge, 53, wiper block, 54, elasticity sand-proof pipe, 55, mounting groove.
Detailed description of the invention
Embodiment 1
The invention discloses a kind of fracture job method that multi-stage water power sprays fracturing strings, its step is as follows:
S1: multi-stage water power sprays fracturing strings advanced person before going into the well and to work well, well-flushing;
S2: assembly multi-stage water power sprays fracturing strings;
S3: lower brill, adjustment drilling tool is to construction location;
S4: install well head and surface line, and pressure testing;
S5: according to the infusion program construction first paragraph of pressing crack construction design, complete the rear oil pipe open flow of construction, help row with 600L/min reacting cycle after spray gesture weakens;
S6: adjustment drilling tool position, makes ejector face toward the second segment specking of design, then according to infusion program construction second segment, adjusts drilling tool by after S5 step open flow after completing construction, repeats this step, until judge tool failures;
S7: drop into steel ball from well head, build the pressure in oil pipe 8 ~ 12MPa, cut off shear pin fixing between gun body and sliding sleeve, sliding sleeve comes downwards to sliding sleeve and is located joint, blocking lower passage, open the fluid hole of spray gun and the inlet opening of packer on Water jet packing tool simultaneously, packing element due to spray gun throttling action expansion packing element set, the oil jacket annular space of packing bottom; Water jet packing tool eyelet place forms jet, and Casing-Cutting wall and stratum pore-forming, then carry out pressing crack construction;
S8: after open flow has recoiled, adjustment drilling tool, to lower floor's construction location, drops into steel ball (preventing steel ball open flow process from discharging with returning discharge opeing, impact construction) from well head and carries out lower floor's construction, until tool failures, pull out of hole and change drilling tool;
S9: repeat above-mentioned S2-S8 step until complete all construction intervals;
Spray fracturing strings opening multi-stage water power, when implementing the spray gun abrasive perforating in S5, S6, S7 and S8 step, oil pressure occur abnormal higher, oil pressure when first should check contrast interval physical property and abrasive perforating,
(1) if physical property is close between interval, and the expulsion pressure of each interval is all abnormal higher, and cover to release liquid normal, then predicate stratum reason, and non-tool reason, processing method now: continue construction when not superpressure;
(2) if physical property is close between interval, but it is large to spray oil pressure between interval, and otherness is abnormal higher, then judge that nozzle is by foreign matters from being blocked or sand plug, processing method now: should check and timely regulates liquid glue connection ratio, guarantee that glue connection is good, timely anti-flushing well de-plugging.
Spray gun abrasive perforating in described S5, S6, S7 and S8 step, specifically refer to: the infusion program construction first paragraph according to pressing crack construction design in S5 step, in S6 step according to infusion program construction second segment, Water jet packing tool eyelet place in S7 step forms jet, Casing-Cutting wall and stratum pore-forming, then carry out pressing crack construction, and in S8 step from well head drop into steel ball carry out lower floor's construction.Between described interval, physical property mainly refers to fracture pressure and the permeability of formation rock.
Embodiment 2
On the basis of embodiment 1, there is oil pressure when opening spray gun abrasive perforating abnormal on the low side, first contrasting with last layer section expulsion pressure, if expulsion pressure obviously reduces, be judged to be that nozzle erosion is serious, processing method now:
(1) according to operating instruction, the next one " injection unit " of opener string or the inspection replacing instrument that pulls out of hole;
(2) there is breaking point in multi-stage water power injection fracturing strings, and trip-out is checked.
Embodiment 3
As a better embodiment of the present invention, the invention discloses a kind of fracture job method that multi-stage water power sprays fracturing strings, in described S2 step, assembly multi-stage water power sprays the mode of fracturing strings: the hydraulic centralizing device that every one-level spraycan of multi-stage jet instrument includes a Water jet packing tool and is connected with Water jet packing tool, every one-level spraycan joins end to end, Water jet packing tool in first order spraycan is connected with righting ball-and-seat, righting ball-and-seat connects eye pipe and guiding plug successively, the afterbody spraycan of multi-stage jet instrument connects safety joint, connected pipes in safety joint, until well head.
Embodiment 4
On the basis of above-described embodiment, described Water jet packing tool comprises spray gun, packer and sliding sleeve and is located joint, one end of packer connects spray gun, the other end of packer connects sliding sleeve and is located joint, in spray gun, be provided with sliding sleeve, the internal diameter of described sliding sleeve is reducing, is located joint direction from spray gun toward sliding sleeve, the inwall of described sliding sleeve is that the three-stage structure diminished successively by internal diameter is formed, and is provided with ball seat in sliding sleeve.In a particular application, the specification of the three sections of internal diameters diminished successively is respectively: 28mm, 32mm and 35mm.Described spray gun outer wall runs through and is provided with shear pin, and the outer wall of sliding sleeve is provided with the shear pin groove coordinated with described shear pin, and sliding sleeve is fixed through shear pin and described spray gun.Described spray gun comprises gun body, nozzle cage and nozzle, gun body two ends are respectively top connection and lower contact, gun body is provided with injection hydrophthalmia, nozzle cage is arranged on and sprays in hydrophthalmia, nozzle is arranged in nozzle cage, nozzle outer surface and nozzle cage front end face are provided with topping, and the gun body outer wall of described injection hydrophthalmia surrounding is provided with topping; Sliding sleeve is arranged in the inner chamber of spray gun, and sliding sleeve and spray gun inner chamber are that interference fits is connected; Described sliding sleeve is located joint and comprises that sliding sleeve is located upper end of joint, sliding sleeve is located joint lower end and sliding sleeve is located joint baffle; Described packer comprises packing element and is arranged at the central tube in packing element, packing element upper end is connected with upper glue tube base, packing element lower end is connected with lower rubber cylinder seat, gun body upper end connected pipes, gun body lower end is connected with upper glue tube base respectively at described central tube upper end, lower rubber cylinder seat is connected with packer lower contact upper end with central tube lower end, and packer lower contact lower end is located upper end of joint with sliding sleeve and is connected, and sliding sleeve is located joint lower end and is located joint baffle with sliding sleeve and is connected.Gun body inwall between sliding sleeve and gun body is disposed with the first fluid course and second fluid course of indent, the first fluid course communicates with nozzle.Described second fluid course communicates with the 3rd fluid course, and the 3rd fluid course is axially disposed within gun body lower end along gun body, and the 3rd fluid course communicates with packing element upper end.Described nozzle outer surface and the equal surfacing matcoveredn of nozzle cage front end face, and surfacing matcoveredn on the gun body outer wall of described injection hydrophthalmia surrounding.The topping of described nozzle cage front end face extends on the gun body outer wall of injection hydrophthalmia surrounding, and the gun body outer wall spraying hydrophthalmia surrounding forms topping.On described gun body outer wall, the topping of surfacing covers whole gun body outer wall.Described topping is prefabricated component, is welded on nozzle outer surface, nozzle cage front end face respectively and sprays on the gun body outer wall of hydrophthalmia surrounding.Whole gun body outer wall is covered after prefabricated component welding on described gun body outer wall.Described nozzle is provided with 3-9, and diameter is 3.5mm-6.5mm.Described nozzle and nozzle cage integrally welded, nozzle cage and gun body are threaded connection.Described nozzle is the tungsten-cobalt hard alloy nozzle that hardness reaches HRA90.Described nozzle is nickel base alloy nozzle or tungsten carbide nozzle.Described topping can be tungsten carbide topping or carbide alloy topping.
Embodiment 5
Further, the preferred embodiment of the present invention is, described hydraulic centralizing device comprises centralizer body, centering edge and wiper block, centering edge has mounting groove, wiper block is arranged on mounting groove from centralizer body to outer embedding, described centralizer body inwall is arranged with elasticity sand-proof pipe, and the connectivity part of the closed front mounting groove of elasticity sand-proof pipe and centralizer body inner chamber.The length of elasticity sand-proof pipe is greater than the diameter at mounting groove and centralizer body inner space place, and the outer wall of elasticity sand-proof pipe is connected with centralizer body inner thread.Described wiper block and elasticity sand-proof pipe outer wall closely cooperate.The external diameter of described centering edge is greater than the external diameter of centralizer body.All the other are with embodiment 2.
Embodiment 6
As another preferred embodiment of the present invention, on the basis of above-described embodiment, the hydraulic centralizing device that every one-level spraycan of described multi-stage jet instrument includes a Water jet packing tool and is connected with Water jet packing tool, every one-level spraycan joins end to end, Water jet packing tool in first order spraycan is connected with righting ball-and-seat, righting ball-and-seat connects eye pipe and guiding plug successively, and the afterbody spraycan of multi-stage jet instrument connects safety joint.Described Water jet packing tool comprises spray gun, packer and sliding sleeve and is located joint, one end of packer connects spray gun, the other end of packer connects sliding sleeve and is located joint, sliding sleeve is provided with in spray gun, the internal diameter of described sliding sleeve is reducing, be located joint direction from spray gun toward sliding sleeve, the inwall of described sliding sleeve is that the three-stage structure diminished successively by internal diameter is formed, and is provided with ball seat in sliding sleeve.Described spray gun outer wall runs through and is provided with shear pin, and the outer wall of sliding sleeve is provided with the shear pin groove coordinated with described shear pin, and sliding sleeve is fixed through shear pin and described spray gun.Described spray gun comprises gun body, nozzle cage and nozzle, gun body two ends are respectively top connection and lower contact, gun body is provided with injection hydrophthalmia, nozzle cage is arranged on and sprays in hydrophthalmia, nozzle is arranged in nozzle cage, nozzle outer surface and nozzle cage front end face are provided with topping, and the gun body outer wall of described injection hydrophthalmia surrounding is provided with topping; Sliding sleeve is arranged in the inner chamber of spray gun, and sliding sleeve and spray gun inner chamber are that interference fits is connected; Described sliding sleeve is located joint and comprises that sliding sleeve is located upper end of joint, sliding sleeve is located joint lower end and sliding sleeve is located joint baffle; Described packer comprises packing element and is arranged at the central tube in packing element, packing element upper end is connected with upper glue tube base, packing element lower end is connected with lower rubber cylinder seat, gun body upper end connected pipes, gun body lower end is connected with upper glue tube base respectively at described central tube upper end, lower rubber cylinder seat is connected with packer lower contact upper end with central tube lower end, and packer lower contact lower end is located upper end of joint with sliding sleeve and is connected, and sliding sleeve is located joint lower end and is located joint baffle with sliding sleeve and is connected.Gun body inwall between sliding sleeve and gun body is disposed with the first fluid course and second fluid course of indent, the first fluid course communicates with nozzle.Described second fluid course communicates with the 3rd fluid course, and the 3rd fluid course is axially disposed within gun body lower end along gun body, and the 3rd fluid course communicates with packing element upper end.Described hydraulic centralizing device comprises centralizer body, centering edge and wiper block, centering edge has mounting groove, wiper block is arranged on mounting groove from centralizer body to outer embedding, described centralizer body inwall is arranged with elasticity sand-proof pipe, and the connectivity part of the closed front mounting groove of elasticity sand-proof pipe and centralizer body inner chamber.The length of described elasticity sand-proof pipe is greater than the diameter at mounting groove and centralizer body inner space place, and the outer wall of elasticity sand-proof pipe is connected with centralizer body inner thread.Described safety joint comprises top connection, lower contact, safety joint body, locking tile, locking sliding sleeve and hollow shear pin, described top connection, safety joint body are connected successively with lower contact, locking sliding sleeve is arranged among safety joint body, and locking sliding sleeve is fixed on safety joint body through hollow shear pin, described locking tile is the terraced structure being arranged on safety joint inner body wall, and locking tile coordinates with locking sliding sleeve.Described multi-stage jet instrument comprises three grades, and first order spraycan connects the second spraycan, and second level spraycan connects third level spraycan, and third level spraycan connects safety joint.Described nozzle outer surface and the equal surfacing matcoveredn of nozzle cage front end face, and surfacing matcoveredn on the gun body outer wall of described injection hydrophthalmia surrounding.The topping of described nozzle cage front end face extends on the gun body outer wall of injection hydrophthalmia surrounding, and the gun body outer wall spraying hydrophthalmia surrounding forms topping.On described gun body 2 outer wall, the topping of surfacing covers whole gun body 2 outer wall.Described topping is prefabricated component, is welded on nozzle outer surface, nozzle cage front end face respectively and sprays on the gun body outer wall of hydrophthalmia surrounding.Whole gun body outer wall is covered after prefabricated component welding on described gun body outer wall.Described nozzle is provided with 3-9, and diameter is 3.5mm-6.5mm.Described nozzle and nozzle cage integrally welded, nozzle cage and gun body are threaded connection.Described nozzle is the tungsten-cobalt hard alloy nozzle that hardness reaches HRA90.Described nozzle is nickel base alloy nozzle or tungsten carbide nozzle.Described topping can be tungsten carbide topping or carbide alloy topping.Described wiper block and elasticity sand-proof pipe outer wall closely cooperate.The external diameter of described centering edge is greater than the external diameter of centralizer body.In a particular application, the specification of the three sections of internal diameters diminished successively is respectively: 28mm, 32mm and 35mm.
Embodiment 7
This multi-stage water power sprays the structure of fracturing strings:
This multi-stage water power sprays fracturing strings and is made up of multi-stage jet instrument, every one-level spraycan all comprises a separator, a spray gun and a centralizer, guiding plug is connected with from bottom to top in turn, eye pipe and righting ball-and-seat in the front end of bottom one-level spraycan; The afterbody of guiding plug is rounded shape, and inner circle has spiral screw thread, there is fusiform structure in the outer garden of round end afterbody lower end, fusiform structure can be have multiple plane rib, and also can be the spill fusiform structure caving in, external diameter be not more than; Eye pipe is cylinder barrel-like structure, and before and after it, section is respectively arranged with thread, and the body of eye pipe is provided with aperture; Ball-and-seat is circular structure, and there is thread at ball-and-seat Wai Yuan two ends, and be axial thickening righting rib in the middle of outer garden, in ball-and-seat, have steel ball and baffle plate, centre is through through hole; K344-108 packer is made up of top connection, cylinder sleeve, packing element, central tube and lower contact, and be cylinder sleeve between top connection and lower contact, interlude is provided with packing element, and central tube has hydrophthalmia; Waterpower spray gun comprises upper and lower joint, sprays hydrophthalmia, nozzle, the stage casing of waterpower spray gun is provided with injection hydrophthalmia, gun body is provided with 3-9 nozzle, and according to a large amount of construction embodiment, the quantity the best selecting nozzle is 3,4,6,8 or 9; Nozzle diameter is 3.5-6.5mm, and nozzle diameter is chosen as 3.5mm, 4.5mm, 5.5mm, 6.3mm for best; The two ends of hydraulic centralizing device are thread, cylindrical interlude is provided with centering edge, centering edge is provided with wiper block, hydraulic centralizing device inside is provided with sand-proof pipe.Safety joint is made up of lower contact, body, locking tile, locking sliding sleeve and hollow shear pin.The upper-lower section of spray gun is provided with thread, and the body of spray gun is provided with nozzle bore, has carbide alloy in the external surface spraying plating in gun body top nozzle hole.
This multi-stage water power sprays the connected mode of fracturing strings:
The first order: be that the first order sprays isolating tool in the upper end of described righting ball-and-seat, the first order is sprayed isolating tool and connected a K344-108 packer and an one-level waterpower spray gun successively from bottom to top.
The second level: isolating tool is sprayed in the connection second level, upper end of spraying the one-level waterpower spray gun of isolating tool in the first order, the second level is sprayed isolating tool and is comprised PSK344-110 packer, a spray gun and a hydraulic centralizing device;
Often repeat connection PSK344-110 separator, a spray gun and a hydraulic centralizing device in the upper end of second level injection isolating tool and can increase one-level injection isolating tool.
Safety joint is connected in the upper end of the afterbody hydraulic centralizing device reaching design progression;
All be connected with between every grade of waterpower spray gun and upper level PSK344-110 separator and be located joint;
The upper end of spraying isolating tool at most upper level is safety joint, connects external upset tubing, until well head in the upper end of safety joint.
The implication of K344-108 is: K-inflatable packer; 3-suspension strut mode; The hydraulic base sealed mode of 4-; 4-hydraulic pressure deblocking mode; 108-instrument maximum outside diameter 108mm.
The implication of PSK344-110 is: PS-spraycan; 3-suspension strut mode; The hydraulic base sealed mode of 4-; 4-hydraulic pressure deblocking mode; 110-instrument maximum outside diameter 110mm.
Embodiment 8
Live embodiment:
(1) consider that the conventional jetting tubing string used can not meet the jetting of current oil well and the requirement of pressure break combination operation process, predetermined depth location is entered under the Water jet packing tool of different progression is connected into tubing string according to the above-mentioned order of connection, well head continues pumping liquid, first by first order hydrajet tool, perforation and pressing crack construction are carried out to first floor, to construct rear termination of pumping, the mode upwards being dragged tubing string by well head mentions predeterminated position by hydrajet tool, upper two layers is constructed, now PSK hydrajet tool is closed condition, spray gun does not start, packer does not set, after first order hydrajet tool completes multilayer construction, hydrajet tool in tubing string is opened by pitching, and spray gun starts, packer setting.Carry out above-mentioned construction by same step and can complete multi-stage water power sprayed construction.
(2) tubular column structure: " external upset tubing is to well head for external upset tubing (horizontal segment)+27/8 for guiding plug+eye pipe+27/8 " box cupling+ball-and-seat (dribbling and baffle plate)+K344-108 packer+one-level spray gun+be located joint+PSK344-110 Water jet packing tool+27/8 ".
(3) implementation procedure:
1. PSK hydraulic jetting fracturing instrument must carry out drifting, well-flushing before going into the well;
2. assembly tubing string, " external upset tubing is to well head for external upset tubing (horizontal segment)+27/8 for guiding plug+eye pipe+27/8 " box cupling+ball-and-seat (dribbling and baffle plate)+K344-108 packer+one-level spray gun+be located joint+PSK344-110 Water jet packing tool+27/8 " for structure
3. lower brill, adjustment drilling tool is to construction location.
4. well head and surface line are installed, and pressure testing.
5. according to the infusion program construction first paragraph of pressing crack construction design.Complete the rear oil pipe open flow of construction, after spray gesture weakens, help row with 600L/min reacting cycle, until
6. adjust drilling tool position, make ejector face toward the second segment specking of design, then according to infusion program construction second segment, adjust drilling tool by after upper one step process open flow after completing construction, repeat this step, until judge tool failures.
7. φ 34 steel ball is dropped into from well head, build the pressure in oil pipe 8 ~ 12MPa, cut off pin, sliding sleeve comes downwards to and is located in joint, blocking lower passage, open the inlet opening of II grade of PSK344-110 Water jet packing tool spray gun fluid hole and packer simultaneously, packing element due to waterpower spray gun throttling action expansion packing element set, the oil jacket annular space of packing bottom.Water jet packing tool eyelet place, II grade of PSK344-110 forms jet, and Casing-Cutting wall and stratum pore-forming, then carry out pressing crack construction;
8., after open flow has recoiled, adjustment drilling tool, to lower floor's construction location, drops into φ 34 steel ball (preventing steel ball open flow process from discharging with returning discharge opeing, impact construction) from well head and carries out lower floor's construction.Until tool failures, pull out of hole and change drilling tool.
9. above-mentioned steps is repeated until complete all construction intervals.
Embodiment 9
Before going into the well, fracturing tool pipe string sprayed to multi-stage hydraulic and implement the preparation of well.
1, must conscientiously check the quality certification and description before using drilling tool, the instrument exceeding at 1 year date of manufacture is forbidden into use; Premature deterioration when using the tools production exceeded the time limit that packer may be caused to construct.
2, enter before well must thorough through wash well for drilling tool, ensure pit shaft and operating tool string unimpeded, bulky grain (diameter is greater than 3mm) solids can not be left in pit shaft and operating tool string;
3, enter well drilling tool must guarantee correctly to be linked in sequence;
4, pierce and at the uniform velocity enter well, forbid drilling string not well braked upsetting to be bored;
5, when drilling tool is used for horizontal well construction, when entering well tool and being connected in series nearly kickoff point (KOP) position, running speed (lowering velocity is less than 5m/min) must be slowed down, make tool string slow transit through horizontal well kickoff point (KOP); Too fastly tool focus pipe may be caused by bending by kickoff point (KOP).
6, construct in strict accordance with working design, forbid increasing substantially or reduce operational discharge capacity and sand concentration;
7, after every interval has been constructed, open flow must have been controlled in time, forbid entirely to open wide open flow in violation of rules and regulations; Complete spacious blowout prevention may cause casing pressure moment much larger than oil pressure, causes injector nozzle to drop, also likely causes the pressure reduction of casing pressure and oil pressure to be greater than oil pipe collapse resistance instantaneously and cause Tubing failure.
8, often interval open flow terminates, necessary thoroughly anti-flushing well, rinses well in pit shaft after residual proppant, can adjust construction location, to prevent drilling tool sand card by upper lifting pipe post;
9, before three grades of PSK instruments enter well use, must check with the steel ball latus rectum of diameter 34mm, steel ball passes through smoothly as qualified;
10, open PSK instrument and correctly must select steel ball, the steel ball using diameter 34mm opened by secondary PSK instrument, three grades of PSK use the steel ball selecting diameter 38mm, and PSK instrument is once open use, every interval has been constructed after the operation of open flow anti-flushing well, again must deliver the steel ball with the same size used when opening, next section of construction can be carried out;
11, each " injection unit " on tool string adds up sand-passing amount when constructing and is less than 80 cubic metres;
12, this process pipe string is not suitable for that vertical depth is greater than 3500 meters, stratum breaks pressure higher than the Oil/gas Well construction operation of 60MPa.
Embodiment 10
Live embodiment: water horizontal well, the long 6-3 in construction layer position, finishing drilling well depth 2965.0m, implement jetting sand fracturing to horizontal segment 9 speckings, operating tool string adopts horizontal well high-efficiency pipe column combination: 27/8 〞 external upset tubing+three PSK344-110 injection packer+three grades of sliding sleeves are located joint+secondary PSK344-110 injection packer+secondary sliding sleeve and are located joint+one-level waterpower spray gun+K344-108 packer+ball-and-seat+eye pipe+plug.
First drag tubing string with one-level spray gun and carry out jetting and pressing crack construction to first, second, third section, each section of perforation staged pressure is steady, and pressing crack construction process display is normal.
In order to avoid one-level spray gun lost efficacy at the 4th section of perforation, throw Φ 34mm steel ball and open secondary PSK344-110 injection packer tool, sliding sleeve is opened normal, spray packer tool with secondary PSK344-110 and continue the 4th, the 5th, the 6th section of jetting and pressing crack construction, each period of perforation stage is steady, and pressing crack construction is normal.
Do not lose efficacy at the 7th section of perforation in order to secondary PSK344-110 sprays packer, throw Φ 38mm steel ball and open three grades of PSK344-110 injection packer tools, sliding sleeve is opened normal, spray packer tool with three grades of PSK344-110 and continue the 7th, the 8th, the 9th section of jetting and pressing crack construction, each period of perforation stage is steady, and pressing crack construction is normal.
This is implemented, and do not have instrument to use effectively normal, compared with secondary PSK hydraulic jetting fracturing tool tubular column, three grades of PSK hydraulic jetting fracturing instruments can construct two to three sections more, further increase operating efficiency, reduce labour intensity and operating cost.This time last 7 days before and after construction, instrument soak time in well is longer, but packing element seal did not lose efficacy, and ensure that normally carrying out of construction.
Embodiment 11
The present invention runs into judgement and the process of abnormal conditions in implementation process:
During abrasive perforating, the abnormal higher situation of oil pressure judges:
Situation: oil pressure when first checking contrast interval physical property and abrasive perforating, if between interval, physical property is close, expulsion pressure is all abnormal higher, and cover to release liquid normal, then can predicate stratum reason, and non-tool reason.
Processing method: construction can be continued when not superpressure.
Situation: if physical property is close between interval, but it is higher to spray oil pressure big-difference sexual abnormality between interval.
Judge: nozzle is by foreign matters from being blocked or sand plug.
Processing method: check and timely regulates liquid glue connection ratio, guarantee that glue connection is good, timely anti-flushing well de-plugging
2, during abrasive perforating, the abnormal situation on the low side of oil pressure judges:
(1) situation: contrast, if expulsion pressure obviously reduces with last layer section expulsion pressure.
Judge: nozzle erosion is serious.
Processing method: according to next " injection unit " on operating instruction opener string or the inspection replacing instrument that pulls out of hole
(2) there is breaking point in operating tool string: pull out of hole and check.
3, pressure is broken when closedown cover puts prepad fluid Squeezing Ground not obvious:
(1) situation: by casing pressure during squeezing compared with casing pressure during last layer termination of pumping, if squeezing casing pressure is starkly lower than upper strata termination of pumping casing pressure,
Judge: packer badly broken, can not reliably set.
Processing method: open and use next " injection packing units " or trip-out replacing instrument
(2) situation: if squeezing casing pressure is apparently higher than last layer termination of pumping casing pressure, but without obvious pressure drop,
Judge: caused by nearly well band microcrack growth is abundant.
Processing method: after pressure release, improves squeezing discharge capacity and again squeeze, or low concentration adds powder pottery in squeezing prepad fluid.
Be hampered when carrying operating tool string adjustment construction location 4, phenomenon:
(1) situation: under larger upper lifting force effect, tubing string can slowly on carry, also can transfer tubing string,
Judge: sand setting bit freezing.
Processing method: force the unfreezing of upper lifting pipe post when upper lift power allows, or the thorough anti-flushing well unfreezing of huge discharge.
(2) situation: can tubing string be transferred, but can not upper lifting pipe post;
Judge: junk bit freezing.
Processing method: conveniently junk lock of tool drilling disposal methods.
Claims (10)
1. multi-stage water power sprays a fracture job method for fracturing strings, it is characterized in that step is as follows:
S1: multi-stage water power sprays fracturing strings advanced person before going into the well and to work well, well-flushing;
S2: assembly multi-stage water power sprays fracturing strings;
S3: lower brill, adjustment drilling tool is to construction location;
S4: install well head and surface line, and pressure testing;
S5: according to the infusion program construction first paragraph of pressing crack construction design, complete the rear oil pipe open flow of construction, help row with 600L/min reacting cycle after spray gesture weakens;
S6: adjustment drilling tool position, makes ejector face toward the second segment specking of design, then according to infusion program construction second segment, adjusts drilling tool by after S5 step open flow after completing construction, repeats this step, until judge tool failures;
S7: drop into steel ball from well head, build the pressure in oil pipe 8 ~ 12MPa, cut off shear pin fixing between gun body and sliding sleeve, sliding sleeve comes downwards to sliding sleeve and is located joint, blocking lower passage, open the fluid hole of spray gun and the inlet opening of packer on Water jet packing tool simultaneously, packing element due to spray gun throttling action expansion packing element set, the oil jacket annular space of packing bottom; Water jet packing tool eyelet place forms jet, and Casing-Cutting wall and stratum pore-forming, then carry out pressing crack construction;
S8: after open flow has recoiled, adjustment drilling tool, to lower floor's construction location, drops into steel ball from well head and carries out lower floor's construction, until tool failures, pulls out of hole and changes drilling tool;
S9: repeat above-mentioned S2-S8 step until complete all construction intervals;
Spray fracturing strings opening multi-stage water power, when implementing the spray gun abrasive perforating in S5, S6, S7 and S8 step, oil pressure occur abnormal higher, oil pressure when first should check contrast interval physical property and abrasive perforating,
(1) if physical property is close between interval, and the expulsion pressure of each interval is all abnormal higher, and cover to release liquid normal, then predicate stratum reason, and non-tool reason, processing method now: continue construction when not superpressure;
(2) if physical property is close between interval, but it is large to spray oil pressure between interval, and otherness is abnormal higher, then judge that nozzle is by foreign matters from being blocked or sand plug, processing method now: should check and timely regulates liquid glue connection ratio, guarantee that glue connection is good, timely anti-flushing well de-plugging.
2. a kind of multi-stage water power according to claim 1 sprays the fracture job method of fracturing strings, it is characterized in that: oil pressure occurs abnormal on the low side when opening spray gun abrasive perforating, first contrast with last layer section expulsion pressure, if expulsion pressure obviously reduces, be judged to be that nozzle erosion is serious, processing method now:
(1) according to operating instruction, the next one " injection unit " of opener string or the inspection replacing instrument that pulls out of hole;
(2) there is breaking point in multi-stage water power injection fracturing strings, and trip-out is checked.
3. a kind of multi-stage water power according to claim 1 sprays the fracture job method of fracturing strings, it is characterized in that: in described S2 step, assembly multi-stage water power sprays the mode of fracturing strings: the hydraulic centralizing device that every one-level spraycan of multi-stage jet instrument includes a Water jet packing tool and is connected with Water jet packing tool, every one-level spraycan joins end to end, Water jet packing tool in first order spraycan is connected with righting ball-and-seat, righting ball-and-seat connects eye pipe and guiding plug successively, the afterbody spraycan of multi-stage jet instrument connects safety joint, connected pipes in safety joint, until well head.
4. a kind of multi-stage water power according to claim 3 sprays the fracture job method of fracturing strings, it is characterized in that: described Water jet packing tool comprises spray gun, packer and sliding sleeve and is located joint, one end of packer connects spray gun, the other end of packer connects sliding sleeve and is located joint, sliding sleeve is provided with in spray gun, the internal diameter of described sliding sleeve is reducing, joint direction is located from spray gun toward sliding sleeve, the inwall of described sliding sleeve is that the three-stage structure diminished successively by internal diameter is formed, and is provided with ball seat in sliding sleeve.
5. a kind of multi-stage water power according to claim 4 sprays the fracture job method of fracturing strings, it is characterized in that: described spray gun outer wall runs through and is provided with shear pin, the outer wall of sliding sleeve is provided with the shear pin groove coordinated with described shear pin, and sliding sleeve is fixed through shear pin and described spray gun.
6. a kind of multi-stage water power according to claim 4 sprays the fracture job method of fracturing strings, it is characterized in that: described spray gun comprises gun body, nozzle cage and nozzle, gun body two ends are respectively top connection and lower contact, gun body is provided with injection hydrophthalmia, nozzle cage is arranged on and sprays in hydrophthalmia, nozzle is arranged in nozzle cage, and nozzle outer surface and nozzle cage front end face are provided with topping, and the gun body outer wall of described injection hydrophthalmia surrounding is provided with topping; Sliding sleeve is arranged in the inner chamber of spray gun, and sliding sleeve and spray gun inner chamber are that interference fits is connected; Described sliding sleeve is located joint and comprises that sliding sleeve is located upper end of joint, sliding sleeve is located joint lower end and sliding sleeve is located joint baffle; Described packer comprises packing element and is arranged at the central tube in packing element, packing element upper end is connected with upper glue tube base, packing element lower end is connected with lower rubber cylinder seat, gun body upper end connected pipes, gun body lower end is connected with upper glue tube base respectively at described central tube upper end, lower rubber cylinder seat is connected with packer lower contact upper end with central tube lower end, and packer lower contact lower end is located upper end of joint with sliding sleeve and is connected, and sliding sleeve is located joint lower end and is located joint baffle with sliding sleeve and is connected.
7. a kind of multi-stage water power according to claim 6 sprays the fracture job method of fracturing strings, it is characterized in that: the first fluid course and the second fluid course that the gun body inwall between sliding sleeve and gun body are disposed with indent, the first fluid course communicates with nozzle.
8. a kind of multi-stage water power according to claim 7 sprays the fracture job method of fracturing strings, it is characterized in that: described second fluid course communicates with the 3rd fluid course, 3rd fluid course is axially disposed within gun body lower end along gun body, and the 3rd fluid course communicates with packing element upper end.
9. a kind of multi-stage water power according to claim 3 sprays the fracture job method of fracturing strings, it is characterized in that: described hydraulic centralizing device comprises centralizer body, centering edge and wiper block, centering edge has mounting groove, wiper block is arranged on mounting groove from centralizer body to outer embedding, described centralizer body inwall is arranged with elasticity sand-proof pipe, and the connectivity part of the closed front mounting groove of elasticity sand-proof pipe and centralizer body inner chamber.
10. a kind of multi-stage water power according to claim 9 sprays the fracture job method of fracturing strings, it is characterized in that: the length of described elasticity sand-proof pipe is greater than the diameter at mounting groove and centralizer body inner space place, and the outer wall of elasticity sand-proof pipe is connected with centralizer body inner thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310063446.4A CN103266875B (en) | 2013-02-28 | 2013-02-28 | A kind of multi-stage water power sprays the fracture job method of fracturing strings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310063446.4A CN103266875B (en) | 2013-02-28 | 2013-02-28 | A kind of multi-stage water power sprays the fracture job method of fracturing strings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103266875A CN103266875A (en) | 2013-08-28 |
| CN103266875B true CN103266875B (en) | 2015-12-02 |
Family
ID=49010529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310063446.4A Expired - Fee Related CN103266875B (en) | 2013-02-28 | 2013-02-28 | A kind of multi-stage water power sprays the fracture job method of fracturing strings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103266875B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470242B (en) * | 2013-09-14 | 2015-08-19 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of oilfield horizontal well volume fracturing method |
| CN104727787B (en) * | 2015-02-09 | 2018-01-09 | 德惠同利（北京）石油技术服务有限公司 | Pressure wears screen casing filling anti-sand method |
| CN105672957B (en) * | 2016-01-20 | 2018-02-09 | 中国石油化工股份有限公司 | The instrument of envelope pressure is sprayed for multidirectional pressure control type and includes its tubing string |
| CN105672935B (en) * | 2016-01-20 | 2018-03-02 | 中国石油化工股份有限公司 | The device and include its tubing string that multidirectional pressure control type spray envelope is pressed |
| CN106869893B (en) * | 2017-03-16 | 2018-12-25 | 中国石油集团渤海钻探工程有限公司 | Perforation/pressure break/packing integrated apparatus and its multistage fracturing process pipe string |
| CN109826597B (en) * | 2017-11-22 | 2021-08-13 | 中国石油化工股份有限公司 | Vertical well fixed face hydraulic perforation fracturing device and method |
| CN109958422A (en) * | 2019-04-19 | 2019-07-02 | 中国石油天然气股份有限公司 | One kind being suitable for huge discharge pressure and drives anti-spray anti-clip technique |
| CN110578507B (en) * | 2019-09-18 | 2021-06-04 | 大庆市宏博晟达石油机械设备有限公司 | Reusable sand blower for fracturing stratum of oil field |
| CN111594123A (en) * | 2020-05-09 | 2020-08-28 | 大庆辰平钻井技术服务有限公司 | Jet staged fracturing method for bare hole immovable pipe column of ultra-short radius horizontal well |
| CN114837629B (en) * | 2022-03-29 | 2023-08-01 | 郝爱国 | Acidification switch type sand filtering pipe |
| CN114876370B (en) * | 2022-06-01 | 2023-03-28 | 中国石油大学(北京) | Multi-point directional jet drilling tool and method of use thereof |
| CN115126464B (en) * | 2022-08-04 | 2023-08-11 | 中国石油大学(北京) | Multistage positioning flexible fracturing tool and ultra-short radius radial horizontal well fracturing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2420421Y (en) * | 2000-04-07 | 2001-02-21 | 朱福金 | Composite fracturing slot tool |
| CN201786344U (en) * | 2010-09-29 | 2011-04-06 | 中国石油集团西部钻探工程有限公司 | Multistage fracturing tool |
| CN202181857U (en) * | 2011-07-18 | 2012-04-04 | 海城市石油机械制造有限公司 | Multifunctional safe joint |
| CN102536185A (en) * | 2011-12-08 | 2012-07-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Multi-stage draggable water-jet packer tubular column and technology |
| CN202381064U (en) * | 2011-11-25 | 2012-08-15 | 中国石油天然气股份有限公司 | Dedicated tool integrated with laminating and fracturing |
| CN202500541U (en) * | 2011-12-15 | 2012-10-24 | 中国石油天然气股份有限公司 | Tubular column of gas well plumb shaft multi-level layering fracturing technology |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9920600B2 (en) * | 2011-06-10 | 2018-03-20 | Schlumberger Technology Corporation | Multi-stage downhole hydraulic stimulation assembly |
-
2013
- 2013-02-28 CN CN201310063446.4A patent/CN103266875B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2420421Y (en) * | 2000-04-07 | 2001-02-21 | 朱福金 | Composite fracturing slot tool |
| CN201786344U (en) * | 2010-09-29 | 2011-04-06 | 中国石油集团西部钻探工程有限公司 | Multistage fracturing tool |
| CN202181857U (en) * | 2011-07-18 | 2012-04-04 | 海城市石油机械制造有限公司 | Multifunctional safe joint |
| CN202381064U (en) * | 2011-11-25 | 2012-08-15 | 中国石油天然气股份有限公司 | Dedicated tool integrated with laminating and fracturing |
| CN102536185A (en) * | 2011-12-08 | 2012-07-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Multi-stage draggable water-jet packer tubular column and technology |
| CN202500541U (en) * | 2011-12-15 | 2012-10-24 | 中国石油天然气股份有限公司 | Tubular column of gas well plumb shaft multi-level layering fracturing technology |
Non-Patent Citations (1)
| Title |
|---|
| 水平井多级水力喷射压裂封隔工具;张波等;《石油机械》;20121231;第40卷(第12期);第110页第1栏第2段，第110页第2栏第2段，第111页第1栏第1段-第2栏第6段，图1、4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103266875A (en) | 2013-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103266875B (en) | A kind of multi-stage water power sprays the fracture job method of fracturing strings | |
| CN103266876B (en) | Multi-stage water power sprays the fracture job method of fracturing strings | |
| CN103266873A (en) | Connecting structure of multilevel hydraulic spraying segmentation fracturing tubular column | |
| CN101539007B (en) | Abrasive jetting device and method for abrasive jetting flow and jetting perforation and multiple fracturing | |
| CN100562645C (en) | High pressure water jet-flow deep penetrating perforating and auxiliary crushing method and device thereof | |
| CN101457640B (en) | Abradant jet downhole perforation, and kerf multiple fracturing method | |
| CN103184856A (en) | Hydraulic jet packer applicable to multilevel hydraulic jet fracturing | |
| CN108952580B (en) | Drilling pipe recoverable abrasive jet flow fishbone spur well drilling and completion device | |
| CN105484719A (en) | Method for improving multi-cluster crack initiation effectiveness by blocking seams through multi-scale soluble balls | |
| CN103452542B (en) | Can switch fracturing sliding bush | |
| CN102493791A (en) | Abrasive material jet injection device | |
| CN105888638A (en) | Timing sliding sleeve fracturing pipe column | |
| CN104564003A (en) | Drilling-plug-free pumping-in hydraulic bridge plug staged fracturing method | |
| CN103075139A (en) | Immovable string hydraulic jetting technology for fracture acidizing and string for immovable string hydraulic jetting technology for fracture acidizing | |
| CN102425371A (en) | Compound cave making method of open hole of coalbed gas well | |
| CN112814640A (en) | Multi-layer under-pressure fracturing operation device for medium-low pressure well and application method | |
| CN103184867A (en) | Jet packer ground simulation method applicable to multilevel hydraulic jet fracturing | |
| CN110410053A (en) | Coal mine roof plate pressure relief method based on eyelet supporting | |
| CN111779466B (en) | Method for solving problem of shaft blockage of failed prefabricated restrictor through hydraulic sand blasting perforation process | |
| CN206071557U (en) | A kind of anti-sticking ball sliding sleeve hydraulic ejector and fracturing string | |
| CN105298443B (en) | Oil pipe blowout, gaslift and pressure break connection make method under oil pipe float valve and insufficient balance well completion | |
| CN104453798A (en) | PVC sleeve pipe waterpower sand blasting perforation device and using method thereof | |
| CN203188992U (en) | Multistage hydraulic jetting staged fracturing pipe column structure | |
| CN115822530A (en) | Long horizontal section under-pressure drill rod transmission well-flushing and perforation integrated tool and method | |
| CN109723377B (en) | Open hole well completion reservoir integrated transformation method for window-opening side drilling |
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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211020 Address after: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING Co. Address before: 710018 room 1207, Changqing building, Changqing Xing Long Yuan District, Xi'an, Shaanxi Patentee before: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING COMPANY LIMITED CHANGQING DOWNHOLE TECHNOLOGY Co. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |