CN105863554A - Embedded sealing unit - Google Patents
Embedded sealing unit Download PDFInfo
- Publication number
- CN105863554A CN105863554A CN201610291944.8A CN201610291944A CN105863554A CN 105863554 A CN105863554 A CN 105863554A CN 201610291944 A CN201610291944 A CN 201610291944A CN 105863554 A CN105863554 A CN 105863554A
- Authority
- CN
- China
- Prior art keywords
- ring
- bolt
- slips
- embedded
- sealing
- 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.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
Abstract
The invention provides an embedded sealing unit, and belongs to the field of well fixing devices. The embedded sealing unit comprises a sealing assembly and an expansion sealing assembly. The sealing assembly is arranged in a sealing sleeve. The expansion sealing assembly comprises a central pipe. One end of the central pipe is connected with a sleeve accessory through an internal thread. The other end of the central pipe is provided with a positioning notch groove. The expansion sealing assembly is fixed to the horizontal plane and can drive the sealing assembly for sealing. The defects in the prior art are overcome; the high cost for machining a special threaded sleeve accessory when a well is fixed through a special threaded sleeve is reduced; meanwhile, for reliably fixing the sleeve accessory in the sleeve, the embedded sealing unit is used in cooperation with the sleeve accessory, the functions of a conventional sleeve accessory can be provided, and the embedded sleeve accessory can be installed on a construction site; the embedded sealing unit is reasonable in structure, low in price, convenient to operate, reliable in function and capable of being applied to various threaded sleeves.
Description
Technical field
The invention belongs to casing and cementing apparatus field, particularly relate to a kind of embedded sealed unit.
Background technology
Well cementation is last link of drilling engineering, and casing hardware (float collar, float shoe, ball seat etc.) is right
Drilling engineering quality and economic benefit have directly impact.Deep-well, ultradeep well, gas storage well, sea at present
The sleeve pipe that upper oil field etc. use contains increasing special thread, the connection sealing requirement between sleeve pipe
More and more higher, owing to matched casing hardware needs to process corresponding casing threads, because of processing producer
Less, difficulty of processing big, consequent costly and screw processing quality is not easy to ensure, increase
The mistake envelope risk of sleeve pipe pipe string.
In order to solve the problems referred to above, develop embedded casing hardware at present, by sealing unit and function
Unit forms, and sealing unit has slips and sealing ring, can directly set in sleeve pipe, and sealing unit can
To connect with different functional units, form embedded float collar, embedded float shoe, embedded ball seat etc..
The embedded sealed instrument (Baker Oil Tools part#H079721601) of Baker Hughes Inc,
(patent No.: US2008019142) and one with position float collar (publication number: CN201851075) are all
Rely on one group of slips of hydraulic drive to be fixed on internal surface of sleeve pipe by casing hardware, but need supporting hydraulic pressure
Pump.If rated pump pressure is higher, then the volume etc. of the hydraulic pump to be increased that is bound to, occur carrying, operating not
The problem such as just；If rated pump pressure is low, then there will be sealing unit and set the problems such as shakiness.
A kind of Oil/gas Well is with friction type built-in float collar (authorizing publication number: CN201738874), and this float collar depends on
Slips is strutted it is fixed on internal surface of sleeve pipe by screwing cage screw thread, but this float collar can only bear reversely pressure
Power, it is impossible to bear forward plug bruising pressure, therefore limit its range limited.Also have a kind of interior
Put formula casing float collar (authorize publication number: 202176310), there are four groups of slips, but slips periphery
The rectangular teeth of processing is unfavorable for setting of sealing unit.
Summary of the invention
In view of this, it is contemplated that propose a kind of to set more reliable and more stable embedded sealed unit.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that: a kind of embedded sealed list
Unit, including black box and swollen sealing assembly, described black box is located in sleeve pipe to be sealed, described swollen envelope
Assembly includes central tube, and one end of described central tube is connected with casing hardware by internal thread, and the other end sets
There is locating notch groove；
The outer ring of described central tube is provided with step surface, being coaxially disposed by paracentral part of described step surface
Back-up ring, slips, bullet, baffle ring, sealing ring and spacer ring, the both sides of described spacer ring symmetry successively is had to set
Putting described sealing ring, baffle ring, bullet, slips and back-up ring, described back-up ring is near the one of described internal thread
End contacts setting with the vertical joint face of described step surface, and described back-up ring is near the one of described locating notch groove
Side is provided with pressure ring, and described pressure ring is provided with lock sleeve away from the side of described back-up ring, and described lock sleeve is away from institute
The one end stating pressure ring is provided with rotation gap slot；
Described swollen sealing assembly one end is fixing in the horizontal plane, and described swollen sealing assembly includes locking hollow pin and center
Barrel bolt, described locking hollow pin drives described lock sleeve along the axial side of central tube by described rotation gap slot
To mobile and around described central tube central rotation, described center barrel bolt passes through locating notch groove to described
Central tube is fixed, and described locking hollow pin and described center barrel bolt are coaxially disposed and the two is connected by screw thread
Connecing, described center barrel bolt is located at the inside of described locking hollow pin.
Further, described swollen sealing assembly also includes that bolt, support and nut, described center barrel bolt pass through
Described bolt and the nut mated with described bolt are fixing on the bracket, and described support passes through top
The through hole arranged is fixing in the horizontal plane, and described center barrel bolt is arranged with described support vertical.
Further, the outer ring of the described locking hollow pin section near one end of described center barrel bolt is positive six
Limit shape.
Further, described sealing ring is " V " shape sealing ring.
Further, described back-up ring and the contact surface of described slips are α with the angle of vertical plane.
Further, the outer ring of described slips is provided with anti-slop serrations.
Further, the inner ring of described slips is taper seat, and the outer ring of described bullet is taper seat, institute
Setting is mated in the outer ring of the inner ring and described bullet of stating slips.
Further, described bolt is polygonized structure near one end of nut, near one end of nut is
External screw thread.
Further, the outer ring of described center barrel bolt is provided with spacing preiection away from one end of described bolt, institute
The inner ring of the outer ring and described locking hollow pin of stating spacing preiection overlaps setting.
Compared with prior art, the present invention has the advantage that with good effect and is: 1, the present invention is at spacer ring
Two ends be symmetrical arranged slips and sealing ring, by two groups of slips, casing hardware can be fixed on set to be sealed
Inside pipe wall, and can bear bidirectional load, can play sealing function by two groups of sealing rings, it is to avoid use
Casing hardware pipe nipple, reduces well cementation cost, and it is attached to realize installing embedded sleeve pipe at operation field
Part, rational in infrastructure, easy and simple to handle, function is reliable, sets firmly；2, the outer ring at locking hollow pin sets
Put hexagon shape, be beneficial to pipe wrench clamping；3, slips and back-up ring use contact of incline plane to arrange, and are conducive to
The slip of slips；4, bolt uses polygonized structure near one end of nut, is possible to prevent center barrel bolt
Rotate, promote the reliability of location；5, on the barrel bolt of center, spacing preiection is set, prevents lock sleeve lock
Tight excessive and connection slips.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, the present invention's
Schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.?
In accompanying drawing:
Fig. 1 is the structural representation of black box of the present invention.
Fig. 2 is the structural representation of the swollen sealing assembly of the present invention.
Fig. 3 is the partial schematic diagram of black box of the present invention.
Description of reference numerals:
1-central tube；2-back-up ring；3-slips；4-bullet；5-baffle ring；6-sealing ring；7-spacer ring；
8-pressure ring；9-lock sleeve；10-sleeve pipe to be sealed；11-locks hollow pin；12-center barrel bolt；121-limits
Position is protruding；13-bolt；14-support；15-nut；16-through hole.
Detailed description of the invention
It should be noted that in the case of not conflicting, in embodiment in the present invention and embodiment
Feature can be mutually combined.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ",
On " ", D score, "front", "rear", "left", "right", " vertically ", " level ",
" push up ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be for based on shown in accompanying drawing
Orientation or position relationship, be for only for ease of the description present invention and simplifying and describe rather than instruction or dark
Show that device or the element of indication must have specific orientation, with specific azimuth configuration and operation, therefore
It is not considered as limiting the invention.Additionally, term " first ", " second " etc. are only used for describing
Purpose, and it is not intended that instruction or hint relative importance or implicit indicate indicated technical characteristic
Quantity.Thus, the feature defining " first ", " second " etc. can be expressed or impliedly wrap
Include one or more this feature.In describing the invention, except as otherwise noted, " multiple "
It is meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term
" install ", " being connected ", " connection " should be interpreted broadly, and connect, also for example, it may be fixing
Can be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.
For the ordinary skill in the art, can understand that above-mentioned term is in the present invention by concrete condition
In concrete meaning.
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is elaborated.
As shown in Figure 1, Figure 2 and Figure 3, the present invention is a kind of embedded sealed unit, including sealing group
Part and swollen sealing assembly, black box is located in sleeve pipe 10 to be sealed, and swollen sealing assembly includes central tube 1, in
One end of heart pipe 1 is connected with casing hardware by internal thread, and the other end is provided with locating notch groove；
The outer ring of central tube 1 is provided with step surface, step surface be coaxially arranged with back-up ring by paracentral part
2, slips 3, bullet 4, baffle ring 5, sealing ring 6 and spacer ring 7, the both sides of spacer ring 7 are the most symmetrical
Arranging sealing ring 6, baffle ring 5, bullet 4, slips 3 and back-up ring 2, back-up ring 2 is near the one of internal thread
End contacts setting with the vertical joint face of step surface, and back-up ring 2 is provided with pressure ring near the side of locating notch groove
8, pressure ring 8 is provided with lock sleeve 9 away from the side of back-up ring 2, and lock sleeve 9 is provided with away from one end of pressure ring 8
Rotate gap slot；
Swollen sealing assembly one end is fixed on horizontal plane, and swollen sealing assembly includes locking hollow pin 11 and center barrel bolt 12,
Locking hollow pin 11 drives lock sleeve 9 move along the axial direction of central tube 1 and enclose by rotating gap slot
Around the central rotation of central tube 1, central tube 1 is fixed by center barrel bolt 12 by locating notch groove,
Locking hollow pin 11 is coaxially disposed with center barrel bolt 12 and the two is threaded connection, and center barrel bolt 12 sets
Inside at locking hollow pin 11.
Preferably, swollen sealing assembly also includes that bolt 13, support 14 and nut 15, center barrel bolt 12 lead to
Cross bolt 13 and the nut 15 mated with bolt 13 is fixing on the support 14, by upper on support 14
The through hole 16 that side is arranged is fixing in the horizontal plane, and center barrel bolt 12 is vertically arranged with support 14.
Preferably, the outer ring of locking hollow pin 11 section near one end of center barrel bolt 12 is regular hexagon.
Preferably, sealing ring 6 is " V " shape sealing ring 6.
Preferably, back-up ring 2 and the contact surface of slips 3 are α with the angle of vertical plane.
Preferably, the outer ring of slips 3 is provided with anti-slop serrations.
Preferably, the inner ring of slips 3 is taper seat, and the outer ring of bullet 4 is taper seat, slips 3
Inner ring mates setting with the outer ring of bullet 4.
Preferably, bolt 13 is polygonized structure near one end of nut, near one end of nut 15 is
External screw thread, it is highly preferred that polygon uses square.
Preferably, the outer ring of center barrel bolt 12 is provided with spacing preiection 121 away from one end of bolt 13, limit
The outer ring of position protruding 121 overlaps with the inner ring locking hollow pin 11 setting.
During actual use, center barrel bolt 12 is fixed on support by bolt 13 and nut 15
On 14, support 14 is fixing in the horizontal plane, and center barrel bolt 12 passes through locating notch groove by central tube 1
Fixing, then locking hollow pin 11 coordinates with lock sleeve 9, uses pipe wrench clamping lock sleeve pin 11 and makes it
Produce with center barrel bolt 12 and rotate against, and then realize the lock sleeve 9 central rotation along central tube 1
And move axially, thus producing axially loaded, it is achieved the slip of slips 3, there is phase in bullet 4
Increase slips 3 external diameter can be made during displacement；The movement progress baffle ring 5 of bullet 4 and the fortune of sealing ring 6
Dynamic, make sealing ring 6 enlarged outside diameter, it is achieved that the sealing of pipe fitting 10 to be sealed, total overcomes existing
There is the deficiency of technology, when reducing specially-threaded casing well cementation, produce because of the casing hardware of processing special thread
Raw great number cost, reliably can fix at inside pipe casing for casing hardware, this embedded sealed simultaneously
Unit and casing hardware with the use of, the function that conventional cannula annex is had can not only be provided, and
Can realize at operation field embedded casing hardware being installed, rational in infrastructure, low price, easy to operate,
Function is reliable, it is possible to be applied to the sleeve pipe of various screw thread.
Above one embodiment of the present of invention is described in detail, but described content has been only the present invention's
Preferred embodiment, it is impossible to be considered the practical range for limiting the present invention.All according to the present patent application scope
Impartial change and the improvement etc. made, within all should still belonging to the patent covering scope of the present invention.
Claims (9)
1. an embedded sealed unit, it is characterised in that: include black box and swollen sealing assembly, institute
Stating black box to be located in sleeve pipe to be sealed (10), described swollen sealing assembly includes central tube (1), institute
The one end stating central tube (1) is connected with casing hardware by internal thread, and the other end is provided with locating notch groove；
The outer ring of described central tube (1) is provided with step surface, described step surface by paracentral part with
Axle is provided with back-up ring (2), slips (3), bullet (4), baffle ring (5), sealing ring (6)
With spacer ring (7), the both sides of described spacer ring (7) are symmetrical arranged described sealing ring (6), baffle ring successively
(5), bullet (4), slips (3) and back-up ring (2), described back-up ring (2) is in described
One end of screw thread contacts setting with the vertical joint face of described step surface, and described back-up ring (2) is near described
The side of locating notch groove is provided with pressure ring (8), and described pressure ring (8) is away from the one of described back-up ring (2)
Side is provided with lock sleeve (9), and described lock sleeve (9) is provided with rotation away from one end of described pressure ring (8)
Gap slot；
Described swollen sealing assembly one end is fixed on horizontal plane, described swollen sealing assembly include lock hollow pin (11) and
Center barrel bolt (12), described locking hollow pin (11) drives described lock sleeve by described rotation gap slot
(9) axial direction along central tube (1) moves and around the central rotation of described central tube (1),
Described central tube (1) is fixed by described center barrel bolt (12) by locating notch groove, described lock
Tight hollow pin (11) is coaxially disposed with described center barrel bolt (12) and the two is threaded connection, described in
Heart barrel bolt (12) is located at the inside of described locking hollow pin (11).
A kind of embedded sealed unit the most according to claim 1, it is characterised in that: described swollen
Sealing assembly also includes bolt (13), support (14) and nut (15), described center barrel bolt (12)
It is fixed on described support by described bolt (13) and the nut (15) mated with described bolt (13)
(14), on, on described support (14), the through hole (16) by being provided above is fixing in the horizontal plane,
Described center barrel bolt (12) is vertically arranged with described support (14).
3., according to a kind of embedded sealed unit described in any one of claim 1 or 2, its feature exists
In: the outer ring of described locking hollow pin (11) section near the one end at described center barrel bolt (12) is just
Hexagon.
4., according to a kind of embedded sealed unit described in any one of claim 1 or 2, its feature exists
In: described sealing ring (6) is " V " shape sealing ring (6).
5., according to a kind of embedded sealed unit described in any one of claim 1 or 2, its feature exists
In: described back-up ring (2) and the contact surface of described slips (3) they are α with the angle of vertical plane.
6., according to a kind of embedded sealed unit described in any one of claim 1 or 2, its feature exists
In: the outer ring of described slips (3) is provided with anti-slop serrations.
7., according to a kind of embedded sealed unit described in any one of claim 1 or 2, its feature exists
In: the inner ring of described slips (3) is taper seat, and the outer ring of described bullet (4) is taper seat, institute
Setting is mated in the outer ring of the inner ring and described bullet (4) of stating slips (3).
A kind of embedded sealed unit the most according to claim 2, it is characterised in that: described spiral shell
Bolt (13) is polygonized structure near one end of nut, is external screw thread near one end of nut (15).
A kind of embedded sealed unit the most according to claim 2, it is characterised in that: in described
The outer ring of heart barrel bolt (12) is provided with spacing preiection (121), institute away from one end of described bolt (13)
The inner ring of the outer ring and described locking hollow pin (11) of stating spacing preiection (121) overlaps setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291944.8A CN105863554A (en) | 2016-05-05 | 2016-05-05 | Embedded sealing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291944.8A CN105863554A (en) | 2016-05-05 | 2016-05-05 | Embedded sealing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105863554A true CN105863554A (en) | 2016-08-17 |
Family
ID=56631269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610291944.8A Pending CN105863554A (en) | 2016-05-05 | 2016-05-05 | Embedded sealing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105863554A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202176310U (en) * | 2011-08-17 | 2012-03-28 | 周战云 | Built-in sleeve floating hoop |
| CN202250018U (en) * | 2011-10-18 | 2012-05-30 | 中国石油化工股份有限公司 | Underground separate-layer fracturing technical tubular column and drillable packer thereof |
| US20130186616A1 (en) * | 2012-01-25 | 2013-07-25 | Baker Hughes Incorporated | Tubular anchoring system and a seat for use in the same |
| CN203214002U (en) * | 2013-04-22 | 2013-09-25 | 中国海洋石油总公司 | Sump packer |
| CN105332673A (en) * | 2015-11-30 | 2016-02-17 | 天津汇铸石油设备科技有限公司 | Mechanical bridge plug of packer |
| CN205714084U (en) * | 2016-05-05 | 2016-11-23 | 中国石油集团渤海钻探工程有限公司 | A kind of embedded sealed unit |
-
2016
- 2016-05-05 CN CN201610291944.8A patent/CN105863554A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202176310U (en) * | 2011-08-17 | 2012-03-28 | 周战云 | Built-in sleeve floating hoop |
| CN202250018U (en) * | 2011-10-18 | 2012-05-30 | 中国石油化工股份有限公司 | Underground separate-layer fracturing technical tubular column and drillable packer thereof |
| US20130186616A1 (en) * | 2012-01-25 | 2013-07-25 | Baker Hughes Incorporated | Tubular anchoring system and a seat for use in the same |
| CN203214002U (en) * | 2013-04-22 | 2013-09-25 | 中国海洋石油总公司 | Sump packer |
| CN105332673A (en) * | 2015-11-30 | 2016-02-17 | 天津汇铸石油设备科技有限公司 | Mechanical bridge plug of packer |
| CN205714084U (en) * | 2016-05-05 | 2016-11-23 | 中国石油集团渤海钻探工程有限公司 | A kind of embedded sealed unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160817 |