CN103806888B - Down-hole infinite series control fracturing sliding bush - Google Patents
Down-hole infinite series control fracturing sliding bush Download PDFInfo
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- CN103806888B CN103806888B CN201210448947.XA CN201210448947A CN103806888B CN 103806888 B CN103806888 B CN 103806888B CN 201210448947 A CN201210448947 A CN 201210448947A CN 103806888 B CN103806888 B CN 103806888B
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Abstract
The invention discloses a kind of down-hole infinite series control fracturing sliding bush, is not limit the numerical control separate stratum fracfturing transformation of progression to design for realizing Oil/gas Well straight well, is conciliate to stop up to form by numerical control fracturing sliding bush, numerical control blanking plug. Numerical control fracturing sliding bush is formed by connecting by top connection, adapter sleeve, body and lower contact, and the inner sliding sleeve that is provided with layer position ID card is located in adapter sleeve; Numerical control blanking plug is by gland, stifled being formed by connecting of main body cover and the end, and inside is provided with depression bar, reducing piston, sealing plate, conduit and the control panel etc. of the action that is fitted to each other, and the leverage on control panel connects the valve that the end blocks; Separate to stop up and mainly formed by end cap, V-seal and mandrel. The present invention can meet the requirement of the transformation of oil gas field multistage fracturing and selective exploitation, realize downhole pipeline full-bore, can directly carry out discharge opeing, available coiled tubing or banded cable switching tools are opened fracturing sliding bush, can reduce and use pressure break conduction pipeline, reduce labour intensity and construction risk.
Description
Technical field
The present invention relates to a kind of down-hole infinite series control fracturing sliding bush, belong to oil field oil, gas wellFracturing technique field.
Background technology
At present, carrying out the transformation of individual well multilayer is one of effective way realizing well yield, stateThe mode of interior sleeve in oil field well multistage fracturing reform mainly contains two large classes: the one, and utilize cable to penetrateHole, mechanical packer are carried out packing between interval, by once opening fracturing sliding bush, complete manyLevel fracturing reform; The 2nd, carry out hydraulic perforation by hydraulic jetting fracturing instrument, utilizeHydraulic jet effect realizes interlayer packing, sprays pressure break and completes multistage transformation. Above two kinds of worksWhen skill segmentation, the main ball sealer of throwing different size of adopting completes sand blower of sliding sleeves at different levelsOpen and the isolation of the section of transformation. Owing to being subject to well head, pit shaft, operating tool string and tool designThe restriction of the condition of size etc., only can complete the separate stratum fracfturing transformation of finite progression. Work as stratumWhile telling sand, ball is easily buried low-productivity layer, affect individual well fracturing reform effect, and ball is at ball seatOn be unfavorable for later stage workover treatment, if well workover bore mill can secondary injury stratum, affect individual well productAmount, increases construction risk and bore mill operating cost, and above-mentioned technique does not possess later stage controlThe function of system and selective exploitation.
At present, do not limit the fracturing sliding bush of progression need to adopt pressure guiding pipeline to carry out pressure biography abroadLead, form ball seat, lower brill workload is large, and there is leakage risk pipeline junction, and pressure break completesAfter need to bore mill could realize tubing string full-bore, construction risk is large, expense is high.
Summary of the invention
The object of the present invention is to provide a kind of down-hole infinite series control fracturing sliding bush, it can be realExisting Oil/gas Well straight well is not limit the numerical control separate stratum fracfturing transformation of progression, meets oil gas field multistage fracturingThe technological requirement of transformation and selective exploitation.
Concrete technical scheme of the present invention is as follows:
Down-hole infinite series control fracturing sliding bush is by numerical control fracturing sliding bush, numerical control blanking plug and de-pluggingPlug composition:
The adapter sleeve two ends of numerical control fracturing sliding bush connect respectively top connection and body. Body two endsBe provided with V-seal, be evenly provided with pressure break port radially on the barrel of middle part, lower end connects establishesThere is the lower contact of inwall step. Adapter sleeve connects inner sliding sleeve by shear pin, inner sliding sleeve topEnd is provided with a layer position ID card, and lower end is provided with switch groove, is evenly provided with radially logical on the barrel of middle partGroove.
The main body of numerical control blanking plug is arranged with undergauge hole, top post, and in main body sleeve body, establish at middle partHave the piston hole with piston packing, piston hole upper and lower is upper and lower chamber, main body coverOn the barrel of bottom, be evenly provided with lock dog groove radially. On the post of main body cover undergauge hole, be set with V-typeSealing ring, and pierce in gland. In gland centre bore, be provided with sealing ring, top connects drags for capDepression bar run through in gland centre bore and main body cover undergauge post hole, and consolidate by shear pin and glandFixed. Reducing piston is positioned at main body cover, by top-down central diameter piston, path piston,Large footpath piston and the composition of the hole enlargement piston with hole enlargement piston packing, its bottom surface is provided with center coneHole. Lock dog is fixed in the lock dog groove of main body cover by extension spring. Main body cover inwall bottom connectsThe end, is stifled, and the end blocks end face support and control plate. Connecting duct in control panel centre bore, conduit topHold connecting band conduit sealing ring and overlap the spacing sealing plate of inwall step, sealing plate by main bodyEnd face is provided with center cone Kong center, corresponding reducing piston bottom surface frustum. In sealing plate and controlBetween plate, be provided with control module. In control panel eccentric orfice, be provided with pull bar, pull bar top by pin withConnecting plate connects, and is set with sealing gasket, trim ring and back-moving spring on pull bar, and pull bar bottom connectsLever, the lever other end is provided with alignment pin and passes through lever pin connection bracket. Stifled outer wall connects at the endConnect a layer position identifier, the end is stifled, and to be provided with the bottom surface that two bottom surface eccentric orfices and correspondence drag for cap blindHole, is respectively equipped with master switch and ring seat in eccentric orfice, ring seat is provided with spring and valve.
Separate to stop up and mainly formed by end cap, V-seal and mandrel. Mandrel bottom surface is provided with corresponding numberThe de-plugging blind hole that control blanking plug drags for cap, side face is set with mandrel V-seal and end cap successively.
The beneficial effect of infinite series control fracturing sliding bush in down-hole of the present invention is as follows:
Though the present invention's borehole size size, all can realize do not limit progression, numerically controlledSeparate stratum fracfturing transformation, can meet oil gas field multilayer and count the needs of fracturing reform. After pressure break completes,Can realize downhole pipeline full-bore, without boring mill, reduce operating cost; Can directly arrangeLiquid, the time of reducing liquid holdup reservoir, reduces the secondary pollution to stratum. When certain progressionWhen control fracturing sliding bush is opened unsuccessfully, available coiled tubing or banded cable switching tools are opened pressure breakSliding sleeve, ensures the carrying out of follow-up construction. Later stage also can adopt any repeat switch of switching toolsCertain grade of fracturing sliding bush, selectively exploits. Can reduce the pressure break using in foreign technology passesPipe line, reduces labour intensity and construction risk, and when pressure break ground floor without perforation.
Brief description of the drawings
Fig. 1 is numerical control fracturing sliding bush structural representation.
Fig. 2 is numerical control plug structure schematic diagram.
Fig. 3 is for separating blockage structure schematic diagram.
Fig. 4 is not schematic diagram under open mode of down-hole infinite series control fracturing sliding bush.
Fig. 5 is schematic diagram under down-hole infinite series control fracturing sliding bush open mode.
Fig. 6 is schematic diagram under down-hole infinite series control fracturing sliding bush de-plugging state.
Detailed description of the invention
Further illustrate referring to figs. 1 through 6 pairs of embodiments of the invention:
Embodiment:
Down-hole infinite series control fracturing sliding bush comprises numerical control fracturing sliding bush, the reconciliation of numerical control blanking plugStop up three parts.
Numerical control fracturing sliding bush by top connection 1, layer position ID card 2, shear pin 3, adapter sleeve 4,Inner sliding sleeve 5, V-seal 7, body 9 and lower contact 11 form. Adapter sleeve 4 two ends respectivelyTop connection 1 and body 9 are threaded. Body 9 two ends are provided with V-seal 7, middle part barrelOn be evenly provided with four pressure break ports 8 radially, lower end be threaded be provided with inwall step underJoint 11. Adapter sleeve 4 connects inner sliding sleeve 5 by shear pin 3, and establish on inner sliding sleeve 5 topsHave layer position ID card 2, lower end is provided with switch groove 10, is evenly provided with four radially on the barrel of middle partGroove 6. (the present embodiment pressure break port 8 long 50mm, wide 30mm, the long 25mm of switch groove 10,Internal diameter ￠ 78mm, the long 45mm of groove 6, wide 25mm)
Numerical control blanking plug by drag for cap 1 ', depression bar 2 ', shear pin 3 ', sealing ring 4 ', pressLid 5 ', V-seal ring 6 ', main body cover 7 ', piston packing 8 ', extension spring 9 ',Lock dog 10 ', reducing piston 11 ', conduit 12, conduit sealing ring 13, hole enlargement sealing ring14, sealing plate 15, control module 16, pin 17, connecting plate 18, pull bar 19, control panel20, sealing gasket 21, trim ring 22, back-moving spring 23, lever 24, layer position identifier 25,Master switch 26, the end are stifled 27, support 28, alignment pin 29, lever pin 30, valve 31, bulletSpring 32 and ring seat 33 form:
Main body cover 7 ' be provided with undergauge hole, top post, in main body cover 7 ' cylindrical shell, middle part is provided with to be with and livesPlug sealing ring 8 ' piston hole, piston hole upper and lower is upper and lower chamber, main body cover 7 'On the barrel of bottom, be evenly provided with four radially, rectangular lock dog grooves. 7 ' the contracting of main body coverOn the post of hole, footpath, be set with V-seal ring 6 ', and pierce into gland 5 ' in. Gland 5 ' centre boreInside be provided with sealing ring 4 ', top connect drag for cap 1 ' depression bar 2 ' run through gland 5 ' centerIn hole and main body cover 7 ' undergauge post hole, and by shear pin 3 ' with gland 5 ' fix. ReducingPiston 11 ' be positioned at main body cover 7 ', by top-down central diameter piston, path piston,Large footpath piston and the composition of the hole enlargement piston with hole enlargement piston packing 14, during its bottom surface is provided withHeart taper hole. Lock dog 10 ' by extension spring 9 ' be fixed on main body cover 7 ' lock dog groove in. Main bodyThe end that is threaded, cover 7 ' inwall bottom, is stifled 27, and 27 upper surface support and control plates 20 are blocked up at the end.Connecting duct 12 in control panel 20 centre bores, conduit 12 top connecting band conduit sealing rings 13,And by the spacing sealing plate 15 of main body cover 7 ' inwall step, sealing plate 15 end faces are provided with correspondenceThe center frustum of reducing piston 11 ' bottom center taper hole. At sealing plate 15 and control panel 20Between be provided with control module 16. In control panel 20 eccentric orfices, be provided with pull bar 19, pull bar 19 pushes upEnd is connected with connecting plate 18 by pin 17, is set with sealing gasket 21, trim ring 22 and on pull bar 19Back-moving spring 23, pull bar 19 bottoms connect lever 24, and lever 24 other ends are provided with alignment pin29 and by lever pin 30 connection brackets 28. 27 outer wall articulamentum position identifiers 25 are blocked up at the end,The end stifled 27 be provided with two bottom surface eccentric orfices and correspondence drag for cap 1 ' bottom surface blind hole, biasIn hole, be respectively equipped with master switch 26 and ring seat 33, ring seat 33 is provided with spring 32 and valve31. (the long 40mm of the present embodiment main body cover 7 ' lock dog groove, wide 20mm; Reducing piston 11' be respectively ￠ 30mm central diameter piston, ￠ 28mm path piston, the large footpath of ￠ 36mm from top to bottomPiston and ￠ 56mm hole enlargement piston; Sealing plate 15 internal diameter ￠ 15mm, external diameter ￠ 58mm; ControlPlate 20 internal diameter ￠ 15mm, external diameter ￠ 58mm)
Separate to stop up and mainly formed by end cap 34, V-seal 35 and mandrel 36. 36 ends of mandrelFace be provided with corresponding numerical control blanking plug drag for cap 1 ' de-plugging blind hole, side face is set with mandrel V successivelyType sealing 35 and end cap 34.
The function declaration of the each parts of the present invention is as follows:
V-seal ring 6 ' for preventing that liquid is between numerical control blanking plug and numerical control fracturing sliding bushIn annular clearance, reveal, play the shutoff interval of having constructed. When reducing piston 11 ' largeFootpath piston area ejects 10 ' time of lock dog, path piston be just in time positioned at main body cover 7 ' piston holePlace, now upper and lower chamber is communicated with, and makes reducing piston 11 ' moved down, and reclaims lock dog 10'. Conduit 12 is for conducting oil pipe liquid, and reducing piston 11 ' provide thrust is upwards provided.For generation of strong magnetic, obtaining layer position by the control module 16 of electromagnet and digital the electric circuit constituteWhen target zone information that identifier 25 sends, digital circuit start, converts electrical energy into kinetic energy,Starting device work. Layer position identifier 25 carries out nothing with the layer position ID card of numerical control fracturing sliding bushContact, short distance ground wireless communication, once identify as target zone, start control module16, pull connecting plate 18 and pull bar 19, compression reseting spring 23, produces lever 24 and turnsMoving, eject valve 31 downwards, Compress Spring 32, makes oil pipe liquid stifled through valve 31 and the end27 and control panel 20 between cavity inflow catheter 12, upwards promote reducing piston 11 ', willLock dog 10 ' head in the switch groove 10 of inner sliding sleeve 5, pins numerical control fracturing sliding bush.
The course of work of this down-hole infinite series control fracturing sliding bush is as follows:
As shown in Figure 4, numerical control fracturing sliding bush A is connected to the corresponding pressure of completion tubular columnParting position, opens master switch 26, drops into numerical control blanking plug B from well head. As numerical control blanking plug BThrough near the layer position ID card 2 of numerical control fracturing sliding bush A time, its layer of position identifier 25 and layerPosition ID card 2 carries out short-distance wireless communication, reading layer position information. If identify as target zone,Control module 16 startup work, if identify as non-target zone, continue descending.
As shown in Figure 5, control module 16 startup work, electromagnet produces strong magnetic, pullsThe pull bar 19 of numerical control blanking plug B, utilizes lever principle to push valve 31 open, and oil pipe liquid is enteredEnter the conduit 12 of blanking plug, promotion reducing piston 11 ' above move, the large footpath of lock dog 10 ' quilt pistonHead into the switch groove 10 of numerical control fracturing sliding bush A, pin numerical control fracturing sliding bush A. Well head pressurization,Numerical control blanking plug B is displaced downwardly to by the inner sliding sleeve 5 of lock dog 10 ' drive numerical control fracturing sliding bush AThe inwall step place of lower contact 11, now, the groove 6 of inner sliding sleeve 5 is right with pressure break port 8Together, link up tubing and casing shutoff lower floor, thereby realize separate stratum fracfturing. Drop into successively numerical control stifledPlug device B, can open each layer of other numerical control fracturing sliding bush A, the each interval of pressure break.
As shown in Figure 6, after pressure break completes, well head drops into separate and stops up C to one-level topmostNumerical control blanking plug B, make the docking of its de-plugging blind hole drag for cap 1 '. Well head pressurization, cuts off numerical control and blocks upThe shear pin 3 of plug device B ', depression bar 2 ' promotion reducing piston 11 ' move down lock dog 10 ' chancePath piston reset, makes numerical control blanking plug B depart from numerical control fracturing sliding bush A release. Numerical control is stifledPlug device B continues to move to next stage, drags for 1 ' time of cap, well at its bottom surface blind hole docking next stageMouth pressurization, realizes next stage numerical control blanking plug B release, repeats above-mentioned action, successively releaseAll numerical control blanking plug B, realize downhole pipeline full-bore, complete oil gas field cased hole completion modeUnder do not limit progression, numerically controlled fracturing reform step by step, finally close a layer discharge opeing, askProduce. If the later stage will selectively exploit, can adopt special opening-closing tool to open or closeNumerical control fracturing sliding bush A.
Claims (2)
1. a down-hole infinite series control fracturing sliding bush, is characterized in that:
Down-hole infinite series control fracturing sliding bush comprises numerical control fracturing sliding bush, numerical control blanking plug reconciliation obstruction three parts:
Adapter sleeve (4) two ends of numerical control fracturing sliding bush connect respectively top connection (1) and body (9); Body (9) two ends are provided with V-seal (7), are evenly provided with pressure break port (8) radially on the barrel of middle part, and lower end is connected with the lower contact (11) of inwall step; Adapter sleeve (4) connects inner sliding sleeve (5) by shear pin (3), inner sliding sleeve (5) top is provided with layer position ID card (2), lower end is provided with switch groove (10), is evenly provided with groove (6) radially on the barrel of middle part;
The main body cover (7 ') of numerical control blanking plug is provided with undergauge hole, top post, in main body cover (7 ') cylindrical shell, middle part is provided with the piston hole of band piston packing (8 '), piston hole upper and lower is upper and lower chamber, on the barrel of main body cover (7 ') bottom, is evenly provided with lock dog groove radially; On the post of main body cover (7 ') undergauge hole, be set with V-seal ring (6 '), and pierce in gland (5 '); In gland (5 ') centre bore, be provided with sealing ring (4 '), the depression bar (2 ') that cap (1 ') is dragged in top connection runs through in gland (5 ') centre bore and main body cover (7 ') undergauge post hole, and fixing by shear pin (3 ') and gland (5 '); Reducing piston (11 ') is positioned at main body cover (7 '), is made up of the hole enlargement piston of top-down central diameter piston, path piston, large footpath piston and band hole enlargement piston packing (14), and its bottom surface is provided with center taper hole; Lock dog (10 ') is fixed on by extension spring (9 ') in the lock dog groove of main body cover (7 '); At the bottom of main body cover (7 ') inwall bottom connection stifled (27), (27) upper surface support and control plate (20) is blocked up at the end; Connecting duct (12) in control panel (20) centre bore, conduit (12) top connecting band conduit sealing ring (13) and by the spacing sealing plate (15) of main body cover (7 ') inwall step, sealing plate (15) end face is provided with the center frustum of corresponding reducing piston (11 ') bottom center taper hole; Between sealing plate (15) and control panel (20), be provided with control module (16); In control panel (20) eccentric orfice, be provided with pull bar (19), pull bar (19) top is connected with connecting plate (18) by pin (17), pull bar (19) upper suit sealing gasket (21), trim ring (22) and back-moving spring (23), pull bar (19) bottom connects lever (24), and lever (24) other end is provided with alignment pin (29) and passes through lever pin (30) connection bracket (28); (27) outer wall articulamentum position identifier (25) is blocked up at the end, stifled (27) bottom surface, the end is provided with the bottom surface blind hole that eccentric orfice and correspondence are dragged for cap (1 '), in eccentric orfice, be provided with master switch (26) and ring seat (33), ring seat (33) is provided with spring (32) and valve (31);
The de-plugging blind hole that mandrel (36) bottom surface of separating obstruction is provided with corresponding numerical control blanking plug drags for cap (1 '), side face is set with mandrel V-seal (35) and end cap (34) successively.
2. infinite series control fracturing sliding bush in down-hole as claimed in claim 1, is characterized in that:
The long 50mm of pressure break port (8) of numerical control fracturing sliding bush, wide 30mm, the long 25mm of switch groove (10), internal diameter φ 78mm, the long 45mm of groove (6), wide 25mm;
The long 40mm of main body cover (7 ') lock dog groove of numerical control blanking plug, wide 20mm; Reducing piston (11 ') is respectively φ 30mm central diameter piston, φ 28mm path piston, φ 36mm large footpath piston and φ 56mm hole enlargement piston from top to bottom; Sealing plate (15) internal diameter φ 15mm, external diameter φ 58mm; Control panel (20) internal diameter φ 15mm, external diameter φ 58mm.
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| CN201210448947.XA CN103806888B (en) | 2012-11-12 | 2012-11-12 | Down-hole infinite series control fracturing sliding bush |
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| CN103806888B true CN103806888B (en) | 2016-05-11 |
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| CN108952624A (en) * | 2017-05-19 | 2018-12-07 | 中国石油化工股份有限公司 | A kind of infinite stages full-bore fracturing sliding bush |
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