CN103806888A - Downhole infinite level digital control fracture sliding sleeve - Google Patents
Downhole infinite level digital control fracture sliding sleeve Download PDFInfo
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- CN103806888A CN103806888A CN201210448947.XA CN201210448947A CN103806888A CN 103806888 A CN103806888 A CN 103806888A CN 201210448947 A CN201210448947 A CN 201210448947A CN 103806888 A CN103806888 A CN 103806888A
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Abstract
The invention discloses a downhole infinite level digital control fracture sliding sleeve, which is designed for realizing the improvement of the digital control fracturing of separate layers of an oil-gas plumb shaft, and comprises a digital control fracture sliding sleeve, a digital control blocking device and an unblocking plug. The digital control fracture sliding sleeve comprises an upper connector, a connecting sleeve, a body and a lower connector, and an inner sliding sleeve provided with a position ID card is arranged in the connecting sleeve; the digital control blocking device comprises a gland, a main body sleeve and a bottom plug, and is internally provided with a pressure lever, a reducing piston, a sealing plate, a guide pipe and a control plate which are matched with one another for moving, and a lever mechanism on the control plate is connected with a valve on the bottom plug; the unblocking plug mainly comprises an end cover, a V-shaped seal and a mandril. By the downhole infinite level digital control fracture sliding sleeve, the requirements on the improvement of multi-layer fracture and selective exploration of an oil-gas field, the full bore of a downhole pipe string is realized, liquid discharge can be performed directly, the fracture sliding sleeve can be opened by continuous oil pipes or cables and other opening and closing tools, fracture transmitting pipelines can be reduced, and labor intensity and construction risk can be reduced.
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 well fracturing technical field.
Background technology
At present, carrying out the transformation of individual well multilayer is one of effective way realizing well yield, the mode of oil field at home cased well multistage fracturing reform mainly contains two large classes: the one, and utilize cable perforation, mechanical packer to carry out packing between interval, by once opening fracturing sliding bush, complete multistage fracturing transformation; The 2nd, carry out hydraulic perforation by hydraulic jetting fracturing instrument, utilize hydraulic jet effect to realize interlayer packing, spray pressure break and complete multistage transformation.When above two kinds of technique subsections, the main ball sealer of throwing different size that adopts completes the unlatching of sand blower of sliding sleeves at different levels and the isolation of the section of transformation.Owing to being subject to the restriction of condition of well head, pit shaft, operating tool string and tool design size etc., only can complete the separate stratum fracfturing transformation of finite progression.In the time that sand is told on stratum, ball is easily buried low-productivity layer, affect individual well fracturing reform effect, and ball is unfavorable for later stage workover treatment on ball seat, if mill meeting secondary injury stratum is bored in well workover, affect well yield, increase construction risk and bore mill operating cost, and above-mentioned technique does not possess the function that the later stage is controlled and selectively exploit.
At present, do not limit the fracturing sliding bush of progression need to adopt pressure guiding pipeline to carry out pressure conduction abroad, form ball seat, lower brill workload is large, and there is leakage risk pipeline junction, needs to bore mill and could realize tubing string full-bore after pressure break completes, and construction risk is large, and 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 realized Oil/gas Well straight well and not limit the numerical control separate stratum fracfturing of progression to transform, and meets the technological requirement of the transformation of oil gas field multistage fracturing and selective exploitation.
Concrete technical scheme of the present invention is as follows:
Infinite series control fracturing sliding bush in down-hole is conciliate to stop up by numerical control fracturing sliding bush, numerical control blanking plug and is formed:
The adapter sleeve two ends of numerical control fracturing sliding bush connect respectively top connection and body.Body two ends are provided with V-seal, are evenly provided with pressure break port radially on the barrel of middle part, and lower end is connected with the lower contact of inwall step.Adapter sleeve connects inner sliding sleeve by shear pin, and inner sliding sleeve top is provided with layer position ID card, and lower end is provided with switch groove, is evenly provided with groove radially on the barrel of middle part.
The main body of numerical control blanking plug is arranged with undergauge hole, top post, and in main body sleeve body, middle part is provided with the piston hole with piston packing, and piston hole upper and lower is upper and lower chamber, on the barrel of main body cover bottom, is evenly provided with lock dog groove radially.On the post of main body cover undergauge hole, be set with V-seal ring, and pierce in gland.In gland centre bore, be provided with sealing ring, the depression bar that cap is dragged in top connection runs through in gland centre bore and main body cover undergauge post hole, and fixes by shear pin and gland.Reducing piston is positioned at main body cover, and by top-down central diameter piston, path piston, large footpath piston with form with the hole enlargement piston of hole enlargement piston packing, its bottom surface is provided with center taper hole.Lock dog is fixed in the lock dog groove of main body cover by extension spring.Stifled at the bottom of the inwall bottom connection of main body cover, the end, blocks end face support and control plate.Connecting duct in control panel centre bore, catheter tip connecting band conduit sealing ring and by the spacing sealing plate of main body cover inwall step, sealing plate end face is provided with center cone Kong center, corresponding reducing piston bottom surface frustum.Between sealing plate and control panel, be provided with control module.In control panel eccentric orfice, be provided with pull bar, pull bar top is connected with junction plate by pin, is set with sealing mat, trim ring and back-moving spring on pull bar, and pull bar bottom connects lever, and the lever other end is provided with alignment pin and passes through lever pin connection bracket.Stifled outer wall articulamentum position, end identifier, block up and be provided with two bottom surface eccentric orfices and a bottom surface blind hole that correspondence is dragged for cap at the end, is respectively equipped with master switch and ring seat in eccentric orfice, and ring seat is provided with spring and valve.
Separate to stop up and mainly formed by end cap, V-seal and mandrel.The de-plugging blind hole that mandrel bottom surface is provided with corresponding numerical 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:
No matter the present invention's borehole size size, all can realize do not limit progression, numerically controlled separate 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 carry out discharge opeing, reduce the time of liquid holdup reservoir, reduce the secondary pollution to stratum.In the time that certain progression control fracturing sliding bush is opened unsuccessfully, available coiled tubing or banded cable switching tools are opened fracturing sliding bush, guarantee the carrying out of follow-up construction.Later stage also can adopt any repeat switch of switching tools grade fracturing sliding bush, selectively exploits.Can reduce the pressure break conduction pipeline using in foreign technology, reduce labour intensity and construction risk, and when pressure break first floor without perforation.
Accompanying drawing explanation
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.
The specific embodiment
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, numerical control blanking plug reconciliation obstruction three parts.
Numerical control fracturing sliding bush is made up of 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.Adapter sleeve 4 two ends be threaded respectively top connection 1 and body 9.Body 9 two ends are provided with V-seal 7, are evenly provided with four pressure break ports 8 radially on the barrel of middle part, and lower end is threaded and is provided with the lower contact 11 of inwall step.Adapter sleeve 4 connects inner sliding sleeve 5 by shear pin 3, and inner sliding sleeve 5 tops are provided with layer position ID card 2, and lower end is provided with switch groove 10, is evenly provided with four radially grooves 6 on the barrel of middle part.(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 ', gland 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 ring 14, sealing plate 15, control module 16, pin 17, junction plate 18, pull bar 19, control panel 20, sealing mat 21, trim ring 22, back-moving spring 23, lever 24, layer position identifier 25, master switch 26, the end stifled 27, support 28, alignment pin 29, lever pin 30, valve 31, spring 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 be provided with piston packing 8 ' piston hole, piston hole upper and lower is upper and lower chamber, on the barrel of main body cover 7 ' bottom, is evenly provided with four radially, rectangular lock dog grooves.On the post of main body cover 7 ' undergauge hole, be set with V-seal ring 6 ', and pierce into gland 5 ' in.In gland 5 ' centre bore, be provided with sealing ring 4 ', top connect drag for cap 1 ' depression bar 2 ' run through gland 5 ' centre bore and main body cover 7 ' undergauge post hole in, and by shear pin 3 ' with gland 5 ' fix.Reducing piston 11 ' be positioned at main body cover 7 ', by top-down central diameter piston, path piston, large footpath piston with form with the hole enlargement piston of hole enlargement piston packing 14, its bottom surface is provided with center taper hole.Lock dog 10 ' by extension spring 9 ' be fixed on main body cover 7 ' lock dog groove in.The end that is threaded, main body 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 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 orfices, be provided with pull bar 19, pull bar 19 tops are connected with junction plate 18 by pin 17, on pull bar 19, be set with sealing mat 21, trim ring 22 and back-moving spring 23, pull bar 19 bottoms connect lever 24, and lever 24 other ends are provided with alignment pin 29 and pass through 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, in eccentric orfice, be respectively equipped with master switch 26 and ring seat 33, ring seat 33 is provided with spring 32 and valve 31.(the long 40mm of the present embodiment main body cover 7 ' lock dog groove, wide 20mm; Reducing piston 11 ' be respectively from top to bottom ￠ 30mm central diameter piston, ￠ 28mm path piston, ￠ 36mm large footpath piston and ￠ 56mm hole enlargement piston; Sealing plate 15 internal diameter ￠ 15mm, external diameter ￠ 58mm; Control panel 20 internal diameter ￠ 15mm, external diameter ￠ 58mm)
Separate to stop up and mainly formed by end cap 34, V-seal 35 and mandrel 36.Mandrel 36 bottom surfaces be provided with corresponding numerical control blanking plug drag for cap 1 ' de-plugging blind hole, side face is set with mandrel V-seal 35 and end cap 34 successively.
The function declaration of the each parts of the present invention is as follows:
V-seal ring 6 ' for preventing that liquid from revealing from the annular clearance between numerical control blanking plug and numerical control fracturing sliding bush, plays the shutoff interval of having constructed.When reducing piston 11 ' large footpath piston area eject 10 ' time of lock dog, path piston be just in time positioned at main body cover 7 ' piston hole place, now upper and lower chamber is communicated with, and makes reducing piston 11 ' moved down, reclaim lock dog 10 '.Conduit 12 is for conducting oil pipe liquid, and reducing piston 11 ' provide thrust is upwards provided.By the control module 16 of electromagnet and digital the electric circuit constitute, for generation of strong magnetic, in the time obtaining the target zone information that layer position identifier 25 sends, digital circuit start, converts electrical energy into kinetic energy, starting device work.Layer position identifier 25 carries out contactless, short distance ground wireless communication with the layer position ID card of numerical control fracturing sliding bush, once identify as target zone, start control module 16, pull junction plate 18 and pull bar 19, compression reseting spring 23, lever 24 is rotated, eject valve 31 downwards, Compress Spring 32, make the cavity inflow catheter 12 of oil pipe liquid through between valve 31 and the end stifled 27 and control panel 20, upwards promote reducing piston 11 ', by lock dog 10 ' head in the switch groove 10 of inner sliding sleeve 5, pin 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 fractured layer of completion tubular column position, opens master switch 26, drop into numerical control blanking plug B from well head.When numerical control blanking plug B through the layer position ID card 2 of numerical control fracturing sliding bush A near time, its layer of position identifier 25 carries out short-distance wireless communication, reading layer position information with a layer position ID card 2.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, pull the pull bar 19 of numerical control blanking plug B, utilize lever principle to push valve 31 open, make oil pipe liquid enter the conduit 12 of blanking plug, promote reducing piston 11 ' above move, the large footpath of lock dog 10 ' quilt piston heads into the switch groove 10 of numerical control fracturing sliding bush A, pins numerical control fracturing sliding bush A.Well head pressurization, numerical control blanking plug B is displaced downwardly to the inwall step place of lower contact 11 by the inner sliding sleeve 5 of lock dog 10 ' drive numerical control fracturing sliding bush A, and now, the groove 6 of inner sliding sleeve 5 aligns with pressure break port 8, links up tubing and casing shutoff lower floor, thereby realizes separate stratum fracfturing.Drop into successively numerical control blanking plug 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 the numerical control blanking plug B of one-level topmost, make its de-plugging blind hole docking drag for cap 1 '.Well head pressurization, cut off the shear pin 3 of numerical control blanking plug B ', depression bar 2 ' promotions reducing piston 11 ' move down, lock dog 10 ' chance path piston reset, makes numerical control blanking plug B disengaging numerical control fracturing sliding bush A release.Numerical control blanking plug B continues to move to next stage, drag for 1 ' time of cap at its bottom surface blind hole docking next stage, well head pressurization, realize next stage numerical control blanking plug B release, repeat above-mentioned action, successively all numerical control blanking plugs of release B, realize downhole pipeline full-bore, complete under oil gas field cased hole completion mode and do not limit progression, numerically controlled fracturing reform step by step, finally close a layer discharge opeing, ask product.If the later stage will selectively exploit, can adopt special opening-closing tool to open or close numerical 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 '), and by top-down central diameter piston, path piston, large footpath piston with form with the hole enlargement piston of hole enlargement piston packing 14, 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 junction plate (18) by pin (17), pull bar (19) upper suit sealing mat (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 ￠ 78mm, the long 45mm of groove (6), wide 25mm;
The long 40mm of numerical control blanking plug d main body cover (7 ') lock dog groove, wide 20mm; Reducing piston (11 ') is respectively ￠ 30mm central diameter piston, ￠ 28mm path piston, ￠ 36mm large footpath piston and ￠ 56mm hole enlargement piston from top to bottom; Sealing plate (15) internal diameter ￠ 15mm, external diameter ￠ 58mm; Control panel (20) internal diameter ￠ 15mm, external diameter ￠ 58mm.
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| CN105041283A (en) * | 2014-11-10 | 2015-11-11 | 中国石油化工股份有限公司 | Pull-sleeve type full bore fracturing tool and control method |
| CN106593352A (en) * | 2016-12-27 | 2017-04-26 | 中国石油天然气股份有限公司 | Electrically-controlled sliding sleeve and fracturing string |
| CN106593343A (en) * | 2016-12-15 | 2017-04-26 | 中国石油天然气股份有限公司 | Preset soluble casing plugging device and application method thereof |
| CN106640014A (en) * | 2015-10-30 | 2017-05-10 | 中石化石油工程技术服务有限公司 | Counting type infinite class multi cluster full path sectional fracturing slip sleeve |
| CN107178352A (en) * | 2017-06-23 | 2017-09-19 | 东北石油大学 | Underground full-bore infinite stages fracturing sliding bush |
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| CN105041283B (en) * | 2014-11-10 | 2017-09-15 | 中国石油化工股份有限公司 | Formula of helping pull a cart full-bore fracturing tool and control method |
| CN105041283A (en) * | 2014-11-10 | 2015-11-11 | 中国石油化工股份有限公司 | Pull-sleeve type full bore fracturing tool and control method |
| CN106640014A (en) * | 2015-10-30 | 2017-05-10 | 中石化石油工程技术服务有限公司 | Counting type infinite class multi cluster full path sectional fracturing slip sleeve |
| CN106593343B (en) * | 2016-12-15 | 2023-02-24 | 中国石油天然气股份有限公司 | Preset soluble sleeve blanking plug and using method thereof |
| CN106593343A (en) * | 2016-12-15 | 2017-04-26 | 中国石油天然气股份有限公司 | Preset soluble casing plugging device and application method thereof |
| CN106593352A (en) * | 2016-12-27 | 2017-04-26 | 中国石油天然气股份有限公司 | Electrically-controlled sliding sleeve and fracturing string |
| CN106593352B (en) * | 2016-12-27 | 2019-07-09 | 中国石油天然气股份有限公司 | Automatically controlled sliding sleeve and fracturing string |
| CN107178352A (en) * | 2017-06-23 | 2017-09-19 | 东北石油大学 | Underground full-bore infinite stages fracturing sliding bush |
| CN109882101A (en) * | 2019-04-15 | 2019-06-14 | 湖南科技大学 | A kind of upper end opening-closing control mechanism of small-bore pressure maintaining cord coring drill |
| CN113123757A (en) * | 2020-01-16 | 2021-07-16 | 成都维锐泰达能源技术有限公司 | Intelligent delivery device |
| CN113137206A (en) * | 2020-01-16 | 2021-07-20 | 成都维锐泰达能源技术有限公司 | Multistage fracturing intelligent control system and control method |
| CN111764868B (en) * | 2020-07-14 | 2022-09-23 | 中国石油集团渤海钻探工程有限公司 | Underground seat block extending device |
| CN111764868A (en) * | 2020-07-14 | 2020-10-13 | 中国石油集团渤海钻探工程有限公司 | Downhole seat block extension device |
| CN113266308A (en) * | 2021-06-21 | 2021-08-17 | 西南石油大学 | Well cementation sliding sleeve and method for infinite-stage alternate fracturing full-path switch of horizontal well |
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