CN203515462U - Composite bridge plug and central pipe thereof - Google Patents
Composite bridge plug and central pipe thereof Download PDFInfo
- Publication number
- CN203515462U CN203515462U CN201320645230.4U CN201320645230U CN203515462U CN 203515462 U CN203515462 U CN 203515462U CN 201320645230 U CN201320645230 U CN 201320645230U CN 203515462 U CN203515462 U CN 203515462U
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- central tube
- bridge plug
- composite bridge
- guide
- composite
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Abstract
The utility model relates to a composite bridge plug and a central pipe thereof. The composite bridge plug comprises the central pipe extending vertically along the axis and made of composite materials, wherein a setting pressing ring and a plugging assembly are sleeved on the central pipe from top to bottom, the setting pressing ring is connected with the central pipe through a setting dowel, an installation hole is formed in a pipe body of the central pipe and above the setting pressing ring radially, and a pin sleeve made of metal materials is fixedly arranged in the installation hole coaxially and provided with an inner hole allowing a shearing dowel enabling the composite bridge plug to release to penetrate through. The central pipe can ensure reliable connection of the shearing dowel and reliable cutting on the shearing dowel.
Description
Technical field
The utility model relates to a kind of oil field well capping tools, relates in particular to a kind of composite bridge plug and central tube thereof.
Background technology
In Oil/gas Well test process, for the correct understanding target zone of evaluating, when meeting multilayer stratum, the interlayer of each oil-gas-water layer exists difference need to carry out zonal testing, and well stimulation is carried out in layering, produces and carries out multiple zone completion, temporary transient sealings etc., all need to use bridge blinding layering instrument.Bridging plug is a kind of Oil/gas Well layer separating device extensively adopting both at home and abroad, existing composite bridge plug as disclosed in Chinese patent CN103046896A " a kind of composite bridge plug ", this bridging plug comprises the central tube that axis extends along the vertical direction, on central tube, from top to bottom order is set with and sets pressure ring, blocking component and locating snap ring, blocking component comprises upper slips, upper cone, packing element, lower cone and lower slips, wherein setting pressure ring is connected with central tube by setting pin, on central tube, in the top that sets pressure ring, be provided with restriction and set pressure ring mobile limited step upward, the two ends up and down of packing element are respectively arranged with, lower guard ring, for the smooth brill of rear bridging plug easy to use removes, existing this composite bridge plug is except upper, lower slips and other a few components are made by metal material, outside packing element is made by elastomeric material, central tube, set pressure ring, upper cone, other parts such as lower cone and locating snap ring all adopt composite material to make.With the bridging plug of the design of material processing of this uniqueness, easily bore milling, grind off to such an extent that chip is gently little, can be easier to go out, can prevent bit freezing, be specially adapted to the process operations such as separate stratum fracfturing acidifying, shutoff water of inclined shaft, horizontal well.In use, composite bridge plug and setting tool are delivered to behind relevant position, and the overcoat of setting tool is exerted pressure to setting pressure ring, sets pressure ring and cuts off and set pin and drive upper slips and upper cone moves down, upper cone extruding upper guard ring, packing element and lower guard ring, the stressed rear descending promotion lower cone of packing element and lower slips, reach after certain force value, and the snap ring of upper and lower slips breaks, snap ring slides until bite sleeve pipe along corresponding cone, packing element distortion simultaneously, guard ring opens, until seal up sleeve pipe.Setting tool continues to produce thrust subsequently, setting tool is given up composite bridge plug from shear pin, take out subsequently setting tool, from well head, throw pressure break ball, when pressure break ball enters horizontal segment, by small displacement pump, pressure break ball is delivered on the ball seat of central tube upper end, after playing pressure, the fracturing work of being correlated with.
The problem that existing this composite bridge plug exists is: central tube is made by composite material, and setting tool is connected with central tube by shear pin, this also just means that one end of shear pin is inserted in this composite material of central tube, characteristic due to composite material, cause shear pin also unreliable with being connected of central tube, shear pin one end in central tube easily shakes, in the launch process of bridging plug, shear pin is deviate from easily by central tube and can not be realized the smooth delivery of bridging plug, in the process of giving up, shear pin also easily can not be realized giving up smoothly of bridging plug by deviating from central tube simultaneously, even if shear pin can't help to deviate from central tube, the central tube that composite material is made is also difficult for cutting off shear pin, often there will be the situation of not cut off the failure of giving up due to shear pin, in addition, owing to being provided with limited step on central tube, the setting pressure ring, upper slips, upper cone, packing element, lower cone, lower slips and locating snap ring and can only be set on central tube from the bottom to top of existing bridging plug, the assembling mode of each parts is single, assembling inconvenience, efficiency of assembling is low, the exterior contour of central tube is cylindrical, setting each assemblies such as pressure ring, upper slips, upper cone, packing element, lower cone, lower slips and locating snap ring is all set on the columniform outer peripheral face of central tube, while boring mill after bridging plug is used, each assembly can rotate and more difficult brill removes relative to central tube, especially for this flexible material of packing element, packing element rotates and causes very difficult the boring of packing element to be removed relative to central tube, pressure break ball just can be delivered on the ball seat of central tube upper end after the end of giving up, and has increased the engineering time.
Utility model content
The purpose of this utility model is to provide a kind of can guarantee that the reliable connection of shear pin can guarantee again the central tube that shear pin is reliably cut off; The purpose of this utility model is also to provide a kind of composite bridge plug that uses this central tube.
In order to address the above problem, in the utility model, the technical scheme of central tube is:
A kind of central tube of composite bridge plug, the one end that comprises the body body of being made by composite material radially offers installing hole, in described installing hole, coaxial line is installed with the guide of being made by metal material, and guide has the endoporus installing for realizing shear pin that composite bridge plug gives up.
Described guide is expansion guide.
In the utility model, the technical scheme of composite bridge plug is:
A kind of composite bridge plug, comprise central tube that axis extends along the vertical direction, that made by composite material, on central tube, be set with setting up and down pressure ring and the blocking component of setting, setting pressure ring is connected by setting pin with central tube, on the body of central tube, in the described top that sets pressure ring, radially offer installing hole, in installing hole, coaxial line is installed with the guide of being made by metal material, and guide has the endoporus installing for realizing shear pin that composite bridge plug gives up.
Described guide is expansion guide.
On central tube, be also set with the adapter sleeve of being made by metal material, adapter sleeve is limited on described central tube by described shear pin, the upper end of adapter sleeve extends to the top of central tube upper end, is provided with the bar jointing structure that the pull bar for dropping feeder is in transmission connection on the upper end of adapter sleeve.
Between described central tube and adapter sleeve, be folded with female connector, described upper female connector is limited on described central tube by described guide, and in described upper female connector, be provided with the described pressure ring block that sets and coordinate and limit and set the pressure ring mobile pressure ring Stop structure that sets upward,
Described upper female connector is made by composite material.
Below in blocking component on described central tube is set with locating snap ring, on locating snap ring around being circumferentially evenly arranged at least two flow channels that run through locating snap ring upper and lower end face.
The upper end of described central tube is provided with ball seat, is provided with pressure break ball on ball seat, and the upper end of adapter sleeve arranges up-small and down-big closing-in structure, and described closing-in structure is for stoping pressure break ball to be deviate from by ball seat with spacing cooperation of pressure break ball.
Described blocking component comprises upper slips, upper cone, upper guard ring, lower guard ring, lower cone and the lower slips that order arranges up and down, on the outer peripheral face of described central tube, be provided with the outer square structure of spline, described upper slips, upper cone, upper guard ring, lower guard ring, lower cone and lower slips spline are coincide and are set on the outer square structure of described spline.
The beneficial effects of the utility model are: shear pin is installed in the guide on central tube, although central tube is made by composite material, but guide is made by metal material, the shear pin of metal material connects and firmly can not rock in guide, guarantee the smooth delivery of composite bridge plug, when giving up, guide, shear pin are realized metal sheet slitting metal simultaneously, guarantee reliably cutting off of shear pin, thereby guarantee the reliability of loss.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment 1 of composite bridge plug in the utility model, is also the use state diagram of an embodiment of central tube in minute utility model simultaneously;
Fig. 2 is the structural representation of upper joint cover in Fig. 1;
Fig. 3 is the structural representation of lower joint cover in Fig. 1;
Fig. 4 is the structural representation of central tube in Fig. 1;
Fig. 5 is the structural representation of locating snap ring in Fig. 1;
Fig. 6 be upper female connector and adjacent composite bridge plug in Fig. 1 lower female connector coordinate schematic diagram;
Fig. 7 is the structural representation of central tube in the embodiment 2 of composite bridge plug in the utility model;
Fig. 8 is the stereogram of Fig. 7.
The specific embodiment
A kind of embodiment 1 of composite bridge plug is as shown in Fig. 1 ~ 6: comprise the central tube 3 that axis extends along the vertical direction, on the body outer peripheral face of central tube, be provided with the outer square structure of spline, the outer square structure of spline be and length direction and the square consistent square protruding key 3-1 of central tube extension, outside this spline on square structure from top to bottom sequentially spline be set with and set pressure ring 6, blocking component and locating snap ring 19, blocking component comprises the upper slips 8 that order arranges up and down, upper cone 10, upper guard ring 11, packing element, lower guard ring, lower cone 17 and lower slips 18, set pressure ring, locating snap ring, upper slips, upper cone, upper guard ring, packing element, lower guard ring, lower cone and lower slips are set on the outer square structure of spline of central tube by the identical spline of square hole in spline separately respectively, and wherein packing element comprises upper packing element 12 and the lower rubber cylinder 13 that two-piece unit arranges, and lower guard ring comprises the soft bowl 14 that protects of split setting, firmly protect bowl 15 and retaining ring 16, the soft bowl that protects contact cooperations with lower rubber cylinder, and softly protects the periphery that bowl bag is located at lower rubber cylinder, firmly protects bowl bag and is located at the soft bowl periphery of protecting, and retaining ring bag is located at and is firmly protected a bowl periphery.On lower cone, be provided with four recesses spline groove upward, spline groove be shaped as wedge shape, on retaining ring, be provided with the mosaic structure being embedded in corresponding spline groove.Set pressure ring by setting pin 7 axial limitings on central tube, locating snap ring fixed cover is loaded on central tube, on locating snap ring, around being circumferentially evenly arranged six flow channels 19-1 that run through locating snap ring upper and lower end face, flow channels is the groove structure extending on locating snap ring outer peripheral face.Central tube be respectively arranged with up and down female connector 2 and lower female connector 22, in upper female connector, be provided with and set pressure ring block and coordinate and limit and set the pressure ring mobile pressure ring Stop structure that sets upward, in lower female connector, be provided with pumping bowl 21, the lower end of the upper end of upper female connector and lower female connector is all around being circumferentially arranged at intervals with four end face grooves 24, between adjacent two end face grooves, form a projection 25, the projection in upper female connector is for the end face groove spline plug-in mounting in the lower female connector with adjacent composite bridge plug.On the body of central tube, in the top that sets pressure ring, be provided with the installing hole radially extending, installing hole has six, six installing holes are around circumferentially uniform, in each installing hole, all coaxial line is installed with the expansion guide 4 of being made by metal material, upper female connector is overlapped and is axially limited on central tube by expansion pin, outer race in upper female connector is equipped with adapter sleeve 1, the upper end of adapter sleeve extends to the top of central tube upper end and upper female connector upper end, on the upper end of adapter sleeve, be provided with the bar jointing structure that the pull bar for dropping feeder is in transmission connection, bar jointing structure is the internal thread being arranged on adapter sleeve inner hole wall, adapter sleeve is by being threaded onto shear pin 5 axial limitings in corresponding expansion guide in upper female connector, shear pin is cut off required shearing force and is greater than and sets pin and cut off required shearing force.The upper end of central tube is provided with ball seat, on ball seat, be provided with pressure break ball 23, the upper end of adapter sleeve arranges up-small and down-big closing-in structure, bar jointing structure consists of the internal thread being arranged on the aperture section inner hole wall of closing-in structure, and closing-in structure is for stoping pressure break ball to be deviate from by ball seat with spacing cooperation of pressure break ball.In the present embodiment, adapter sleeve, expansion guide are made by metal material, packing element is made by elastomeric material, central tube, upper female connector, set the composite material that pressure ring, upper slips, upper cone, lower slips, lower cone and locating snap ring form by resin and fiber composite and make, in figure, part 9 represents the tile of upper slipses.
While constructing at the scene, by this composite bridge plug assemble after and dropping feeder by oil pipe, be serially connected in successively in tubing string and be shipped in oil well, adapter sleeve is connected with the pull rod screw of dropping feeder, setting pressure ring coordinates with the pushing cylinder of dropping feeder, pushing cylinder is set in adapter sleeve periphery, after putting in place, tubing string delivery beats hydraulic setting, dropping feeder is beaten to interior pressure, under the thrust of dropping feeder fluid cylinder, the pushing cylinder of dropping feeder is descending, when dropping feeder is suppressed after certain pressure, setting pin is set pressure ring and is cut off, on, lower slips relative motion, on, the upper packing element of lower cone extruding, force packing element external diameter to become large, shutoff oil jacket annular space.Upper and lower slips is risen and is broken into six by liquid at the volley, and the internal surface of sleeve pipe of nipping prevents that the rear upper packing element of compression lost efficacy, now going up packing element is fully compressed, while again dropping feeder being sounded the night watches to large pressure, the pull bar of dropping feeder is broken shear pin by adapter sleeve, thereby has realized giving up between composite bridge plug and dropping feeder.After the end of giving up, adapter sleeve is taken away by dropping feeder, these most of parts that also just mean the composite bridge plug of staying down-hole are made by composite material, thereby being easy to while guaranteeing construction in later period bored and removed, expansion guide is made by metal material, so can retain, shear pin is fixed in expansion guide also can guarantee that shear pin is reliably cut off, the effect of upper female connector is to provide block for setting pressure ring, and locating snap ring provides block for expansion assembly lower end, this also just means and sets pressure ring, each parts in locating snap ring and expansion assembly can be sleeved on central tube by central tube two ends respectively, central tube is a plain shaft structure, both reduced the manufacture difficulty of central tube, also facilitated the assembling of each parts, and because upper female connector and central tube are made by composite material, between two composite material elements, by gluing form, be fixedly connected with, but gluing easily de-while being connected to high temperature, therefore expand guide except can guaranteeing the fixed of shear pin and reliably cutting off, can also guarantee that female connector can be by deviating from central tube, also reduced to the full extent the consumption of metal, assurance can be bored, the setting of closing-in structure on adapter sleeve, assurance pressure break ball can be sent into down-hole with composite bridge plug, does not need other construction, has saved operating efficiency.Projection 25 is arranged at respectively in the upper female connector and lower female connector of composite bridge plug, act as, when down-hole has a plurality of composite bridge plugs to work simultaneously, while boring plug, when the lower slips of higher level's composite bridge plug 26 is drilled fall after, remainder becomes movable part, cannot fix easily and rotate with drill bit, be difficult to bore and remove.Now subordinate's composite bridge plug should be and gives up, and the female connector that is connected 1 has tripped out, has exposed projection and the groove of upper female connector 2 upper ends.While the lower female connector of higher level's composite bridge plug being pushed in upper female connector 2 with drilling tool, projection, the groove of two composite bridge plugs are engaged, composite bridge plug in subordinate just can provide anchorage force for the remainder of higher level's composite bridge plug, prevents that it from rotating with drill bit, has improved it and has bored mill speed.
In other embodiment of the present utility model: the outer cross-sectional shape of central tube can also be that triangle, four distortion, pentagon or other can play the shape of spline effect; Lower guard ring can also be an integrally-built guard ring; Mosaic structure on spline groove on lower cone and lower guard ring can not established yet; Flow channels can also be through-hole structure; Expansion guide also can be replaced by common guide; Upper and lower packing element can be also the overall structure being wholely set; Upper female connector can also not established, and now need on central tube, be provided for stoping setting pressure ring mobile limited step or other position limiting structure upward; Shear pin, adapter sleeve and pressure break ball can also be not as the part of this composite bridge plug, such as external member, only, when delivering toward down-hole, just shear pin, adapter sleeve and pressure break ball are assemblied on composite bridge plug; The number of upper and lower female connector upper surface groove can also be two, three or other number.
A kind of embodiment 2 of composite bridge plug is as shown in Fig. 7 ~ 8: as different from Example 1, the outer square structure of spline on central tube 3 is the protruding key 3-1 of arc to embodiment 2.
The embodiment of central tube is as shown in Fig. 1 ~ 8: the structure of central tube is identical with the central tube described in above-mentioned each composite bridge plug embodiment, is not described in detail in this.
Claims (10)
1. the central tube of a composite bridge plug, comprise the body of being made by composite material, it is characterized in that: one end of body radially offers installing hole, in described installing hole, coaxial line is installed with the guide of being made by metal material, and guide has the endoporus installing for realizing shear pin that composite bridge plug gives up.
2. central tube according to claim 1, is characterized in that: described guide is expansion guide.
3. a composite bridge plug, comprise central tube that axis extends along the vertical direction, that made by composite material, on central tube, be set with setting up and down pressure ring and the blocking component of setting, setting pressure ring is connected by setting pin with central tube, it is characterized in that: on the body of central tube, in the described top that sets pressure ring, radially offer installing hole, in installing hole, coaxial line is installed with the guide of being made by metal material, and guide has the endoporus installing for realizing shear pin that composite bridge plug gives up.
4. composite bridge plug according to claim 3, is characterized in that: described guide is expansion guide.
5. composite bridge plug according to claim 3, it is characterized in that: on central tube, be also set with the adapter sleeve of being made by metal material, adapter sleeve is limited on described central tube by described shear pin, the upper end of adapter sleeve extends to the top of central tube upper end, is provided with the bar jointing structure that the pull bar for dropping feeder is in transmission connection on the upper end of adapter sleeve.
6. composite bridge plug according to claim 5, it is characterized in that: between described central tube and adapter sleeve, be folded with female connector, described upper female connector is limited on described central tube by described guide, is provided with the described pressure ring block that sets and coordinates and limit and set the pressure ring mobile pressure ring Stop structure that sets upward in described upper female connector.
7. composite bridge plug according to claim 6, is characterized in that: described upper female connector is made by composite material.
8. composite bridge plug according to claim 6, is characterized in that: on described central tube, in the below of blocking component fixed cover, locating snap ring is housed, on locating snap ring around being circumferentially evenly arranged at least two flow channels that run through locating snap ring upper and lower end face.
9. composite bridge plug according to claim 5, it is characterized in that: the upper end of described central tube is provided with ball seat, on ball seat, be provided with pressure break ball, the upper end of adapter sleeve arranges up-small and down-big closing-in structure, and described closing-in structure is for stoping pressure break ball to be deviate from by ball seat with spacing cooperation of pressure break ball.
10. according to the composite bridge plug described in claim 3 ~ 9 any one, it is characterized in that: described blocking component comprises upper slips, upper cone, upper guard ring, lower guard ring, lower cone and the lower slips that order arranges up and down, on the outer peripheral face of described central tube, be provided with the outer square structure of spline, described upper slips, upper cone, upper guard ring, lower guard ring, lower cone and lower slips spline are coincide and are set on the outer square structure of described spline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320645230.4U CN203515462U (en) | 2013-10-18 | 2013-10-18 | Composite bridge plug and central pipe thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320645230.4U CN203515462U (en) | 2013-10-18 | 2013-10-18 | Composite bridge plug and central pipe thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203515462U true CN203515462U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320645230.4U Withdrawn - After Issue CN203515462U (en) | 2013-10-18 | 2013-10-18 | Composite bridge plug and central pipe thereof |
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|---|---|
| CN (1) | CN203515462U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573211A (en) * | 2013-10-18 | 2014-02-12 | 中国石油化工股份有限公司 | Composite bridge plug and central tube thereof |
| CN104612626A (en) * | 2015-02-11 | 2015-05-13 | 四机赛瓦石油钻采设备有限公司 | Bridge plug with large drift diameter |
| CN108343395A (en) * | 2018-02-02 | 2018-07-31 | 西南石油大学 | A kind of single deck tape-recorder watt big orifice exempts to bore mill composite bridge plug and its sets method |
| CN108819212A (en) * | 2018-06-04 | 2018-11-16 | 吉林市旭峰激光科技有限责任公司 | A kind of composite bridge plug carbon fiber center pipe manufacturing method |
-
2013
- 2013-10-18 CN CN201320645230.4U patent/CN203515462U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573211A (en) * | 2013-10-18 | 2014-02-12 | 中国石油化工股份有限公司 | Composite bridge plug and central tube thereof |
| CN104612626A (en) * | 2015-02-11 | 2015-05-13 | 四机赛瓦石油钻采设备有限公司 | Bridge plug with large drift diameter |
| CN108343395A (en) * | 2018-02-02 | 2018-07-31 | 西南石油大学 | A kind of single deck tape-recorder watt big orifice exempts to bore mill composite bridge plug and its sets method |
| CN108819212A (en) * | 2018-06-04 | 2018-11-16 | 吉林市旭峰激光科技有限责任公司 | A kind of composite bridge plug carbon fiber center pipe manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140402 Effective date of abandoning: 20170104 |
|
| AV01 | Patent right actively abandoned |