CN206144518U - Bridging plug - Google Patents
Bridging plug Download PDFInfo
- Publication number
- CN206144518U CN206144518U CN201621140255.9U CN201621140255U CN206144518U CN 206144518 U CN206144518 U CN 206144518U CN 201621140255 U CN201621140255 U CN 201621140255U CN 206144518 U CN206144518 U CN 206144518U
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- CN
- China
- Prior art keywords
- slips
- slipses
- keyway
- bridging plug
- upper slipses
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Abstract
The utility model relates to a bridging plug belongs to oil and gas field development downhole tool technical field, and by central pull rod, center tube and install that locking mechanism, slips device, sealing device constitute on the center tube, the slips device includes slips mechanism and time slips mechanism, and the suit is at the sealing device's of center tube upper and lower both ends, going up the slips and being hollow cylinder, the vertical slot of a plurality of ways is evenly processed along outer periphery to lower tip, and the upper end evenly processes the several keyway along the axial, and the vertical slot on the outer periphery of keyway and last slips is in on the same axis, going up the slip spider and being hollow sleeve ring, lower extreme processing has the corresponding spline of going up slips upper end keyway. The beneficial effects are that: the utility model discloses can guarantee even split under in a particular case such as casing deformation can bore bridging plug's the effect of whole slips at axial load to guarantee that each slips piece and sleeve pipe contact stress equal that furthest has improved can bore bridging plug's the bearing capacity and the facility of follow -up construction.
Description
Technical field
The utility model is related to a kind of bridging plug, belongs to oil-gas field development downhole tool technical field.
Background technology
During oil and gas development, Jing carries out construction operation frequently with drilling bridging plug at oil and gas development scene in oil field.Extensively
In general pressure break, water blockoff, tune layer, formation testing, the inspection technique such as pump leakproof and cementing for oil well, bidirectional pressure difference can be born, can be temporary
When or the layer position such as permanent closure bottom hydraulic oil, gas and spray, leakage, easy to operate, safe and reliable, bearing capacity height.
At present, the drilling bridging plug that scene often uses is mainly by top connection (center pull rod), retaining mechanism, central tube, card
Watt device, sealing device and lower contact composition, retaining mechanism is made up of lock ring and lock tube；Slip system is by slips and cone group
Into；Sealing device is made up of packing element and packing element wrister.Slips in drilling bridging plug slip system adopts monolithic construction mostly,
Midway can be avoided to set, while double card tile structure, teeth directional is conversely, realize bridging plug Bidirectional locking.Can bore bridging plug be using cable or
Tubing string is transported to pit shaft precalculated position, the pressure effect produced by gunpowder explosion, hydraulic setting or mechanical setting tool
On slip system, the upper lower slipses in slip system impose upper pressure to the packing element in sealing device and draw two by upper lower cone
Individual power, when pulling force reaches certain value, center pull rod fracture, setting tool departs from bridging plug, now, the lock on bridging plug central tube
Tight mechanism has an effect, and the slips in slip system ruptures and is embedded on internal surface of sleeve pipe, and packing element expands and seals, and completes to sit
Envelope.
ZL201220731283.3 is disclosed can bore bridging plug, and overall slips is hollow cylinder, and inner chamber top is taper knot
Structure, outer wall is dentation, and upper end uniformly processes several longitudinal groove along outer circumference surface, and the design one of this monoblock type slips is card
Conical design taper in watt is identical with the taper of cone matched on bridging plug, is easy to centering；Two is circumferentially uniformly to add
Number road groove is to reduce the intensity at groove, is easy to stress concentration, and during bridging plug sets, upper lower slipses can be equal along groove
Even rupture.But in constructing at the scene, because the problems such as slips material inequality or casing deformation, it may appear that slips is in axle when bridging plug sets
Rupture that rear panel number is uncertain, size is differed under active force and cause central tube and casing eccentricity, packing element are placed in the middle etc. asks
Topic, so as to cause packing element and the uneven and each slips piece of casing-contact stress distribution and the frictional force of sleeve pipe, greatly reduces
The overall bearing capacity of bridging plug.
Utility model content
The purpose of this utility model is to overcome the existing monoblock type slips for boring bridging plug to be caused by slips point lobe inequality
A kind of defect that the overall bearing capacity of bridging plug declines, there is provided bridging plug.
What the purpose of this utility model was realized in：
The utility model bridging plug retaining mechanism, slip system, sealing by center pull rod, central tube and on central tube
Device is constituted, and slip system includes structure identical upper slipses mechanism and lower slipses mechanism, is sleeved on the sealing device of central tube
Upper and lower ends, wherein, upper slipses mechanism is included under upper slipses seat, upper slipses, upper cone, upper cone top taper and upper slipses
The taper of portion's inner conical surface is identical；Upper slipses are hollow cylinder, and inner chamber bottom is pyramidal structure, and outer wall is dentation, bottom edge
If outer circumference surface uniformly processes arterial highway longitudinal groove, upper end uniformly processes vertically several keyways, and keyway is cylindrical with upper slipses
On same axis, keyway is in vertically 0-10 ° of taper to longitudinal groove on side face；Upper slipses seat is cannulated sleeve ring, under
End is machined with the spline of correspondence upper slipses upper end keyway.
Uniform keyway is identical with the quantity and taper of the spline on upper slipses seat on described upper slipses.
The beneficial effects of the utility model are：The utility model can guarantee that particularly in particular cases may be used in casing deformation etc.
The overall slips for boring bridging plug uniformly divides lobe in the presence of axial load, so as to ensure each slips piece with casing-contact stress phase
Deng, improve can bore the facility of the bearing capacity of bridging plug and subsequent construction to greatest extent, reduce work operations amount.
Description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is upper slipses mechanism structure schematic diagram of the present utility model；
Fig. 3 is lower slipses mechanism structure schematic diagram of the present utility model.
Specific embodiment
The utility model is further described below in conjunction with the accompanying drawings：
From Fig. 1, Fig. 2, Fig. 3, the utility model bridging plug is by center pull rod 1, central tube 5 and on central tube 5
Retaining mechanism 2, slip system, sealing device 4 are constituted, and slip system includes structure identical upper slipses mechanism 3 and lower slipses machine
Structure 6, is sleeved on the upper and lower ends of the sealing device 4 of central tube 5, wherein, upper slipses mechanism 3 includes upper slipses seat 301, upper slipses
302nd, upper cone 303, the top taper of upper cone 303 is identical with the taper of the bottom inner conical surface of upper slipses 302；Upper slipses 302 are sky
Heart cylinder, inner chamber bottom is pyramidal structure, and outer wall is dentation, if bottom uniformly processes arterial highway longitudinal groove along outer circumference surface
302a, upper end uniformly processes vertically several keyway 302b, the longitudinal groove on keyway 302b and the outer circumference surface of upper slipses 302
On same axis, keyway 302b is in vertically 0-10 ° of taper to 302a；Upper slipses seat 301 is cannulated sleeve ring, and lower end processes
There is the spline 301a of the upper end keyway 302b of corresponding upper slipses 302.
The quantity and taper of the spline 301a on described upper slipses 302 on uniform keyway 302b and upper slipses seat 301
It is identical.
The utility model is transported to into pit shaft precalculated position using cable or tubing string, by gunpowder explosion, hydraulic setting or
The pressure that mechanical setting tool is produced acts on slip system, when pulling force reaches certain value, the necking down fracture of center pull rod 1,
Setting tool departs from bridging plug, and now, bridging plug retaining mechanism 2 is moved downward along the upper external screw thread of central tube 5, and slip system starts
Motion, the spline 301a on the upper slipses seat 301 of upper slipses mechanism 3 is embedded in the keyway 302b of upper slipses 302, in axial load
Lotus effect is lower to promote upper slipses 302 to move downward along upper cone 303；Meanwhile, the lower shoulder of central tube 5 is in lower slipses mechanism 6
The thrust upwards of lower slipses seat 601, the spline 601a on the lower slipses seat 601 of lower slipses mechanism 6 is embedded in the key of lower slipses 602
In groove 602b, lower slipses 602 are moved upwards along lower cone 603, and upper slipses 302, lower slipses 602 rupture and be embedded in internal surface of sleeve pipe
On, the packing element in sealing device 4 is set and Seal Oil set annular space by the extrusion expansion at two ends, is completed bridging plug and is set.Because of spline
The reason for 301a, keyway 302b tapers, it is ensured that stress concentration is keyway 302b's and longitudinal groove 302a during 302 stress of upper slipses
On axis, the intensity at keyway 302b is minimum on upper slipses 302, under the continuous action of axial load, the meeting of upper slipses 302
Preferentially split from keyway 302b, reach uniformly point lobe, in the same manner, stress concentration is in keyway during 602 stress of lower slipses for lower slipses 602
On the axis of 602b and longitudinal groove 602a, under the continuous action of axial load, lower slipses 602 can preferentially from keyway 602b
Split, reach uniform point of lobe so as to solve overall slips by the bearing capacity that axial load point lobe inequality is caused substantially reduce with
It is follow-up to take out the technical barrier that difficulty is increased.
Claims (2)
1. a kind of bridging plug, retaining mechanism (2), slips dress by center pull rod (1), central tube (5) and on central tube (5)
Put, sealing device (4) is constituted, it is characterized in that：Slip system includes structure identical upper slipses mechanism (3) and lower slipses mechanism
(6) upper and lower ends of the sealing device (4) of central tube (5), are sleeved on, wherein, upper slipses mechanism (3) is including upper slipses seat
(301) cone of, upper slipses (302), upper cone (303), upper cone (303) top taper and upper slipses (302) bottom inner conical surface
Degree is identical；Upper slipses (302) are hollow cylinder, and inner chamber bottom is pyramidal structure, and outer wall is dentation, and bottom is along outer circumference surface
If uniformly processing arterial highway longitudinal groove (302a), upper end uniformly processes vertically several keyways (302b), keyway (302b) with
On same axis, keyway (302b) is vertically in 0-10 ° of cone for longitudinal groove (302a) on upper slipses (302) outer circumference surface
Degree；Upper slipses seat (301) is cannulated sleeve ring, and lower end is machined with the spline of correspondence upper slipses (302) upper end keyway (302b)
(301a)。
2. a kind of bridging plug according to claim 1, is characterized in that：Uniform keyway on described upper slipses (302)
(302b) it is identical with the quantity and taper of the spline (301a) on upper slipses seat (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621140255.9U CN206144518U (en) | 2016-10-19 | 2016-10-19 | Bridging plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621140255.9U CN206144518U (en) | 2016-10-19 | 2016-10-19 | Bridging plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206144518U true CN206144518U (en) | 2017-05-03 |
Family
ID=58622004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621140255.9U Active CN206144518U (en) | 2016-10-19 | 2016-10-19 | Bridging plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206144518U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138910A (en) * | 2018-08-24 | 2019-01-04 | 中国石油天然气股份有限公司 | A kind of low pump note frictional resistance bridge plug and its application method for horizontal well |
-
2016
- 2016-10-19 CN CN201621140255.9U patent/CN206144518U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138910A (en) * | 2018-08-24 | 2019-01-04 | 中国石油天然气股份有限公司 | A kind of low pump note frictional resistance bridge plug and its application method for horizontal well |
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| GR01 | Patent grant |