CN201206455Y - Semi-cementing tool - Google Patents
Semi-cementing tool Download PDFInfo
- Publication number
- CN201206455Y CN201206455Y CNU2008200087058U CN200820008705U CN201206455Y CN 201206455 Y CN201206455 Y CN 201206455Y CN U2008200087058 U CNU2008200087058 U CN U2008200087058U CN 200820008705 U CN200820008705 U CN 200820008705U CN 201206455 Y CN201206455 Y CN 201206455Y
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- China
- Prior art keywords
- packer
- ring
- hole
- plug
- perforate
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- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a semi-stroke well cementing tool for well cementing operation in an oil and gas well. The semi-stroke well cementing tool is composed of a hole opening plug, a hole closing plug and a graded cement injection device assembly. The upper main body of the graded cement injection device, the upper ring of a packer and the lower main body are connected in sequence; the lower ring of the packer is sleeved on the lower main body and is connected with the lower end of a rubber cylinder sleeved on the lower main body; a hole closing sleeve and a hole opening sleeve are respectively arranged inside the upper main body and the upper ring of the packer in sequence; a shear pin is used for fixing the hole closing sleeve and the hole opening sleeve in the upper main body; a radial through hole is formed on the upper main body in the position of the corresponding hole opening sleeve; the top end of the cavity of the hole closing plug is connected with an upper rubber plug base; the shear pin is used for fixing a lower upper rubber plug base in the cavity of the hole opening sleeve; a retaining ring is arranged at the inner bottom end of the hole opening sleeve; a filling duct and a filling valve system are arranged on the upper ring of the packer; the filling duct is communicated with the rubber cylinder of the lower main body; a filling hole on the hole opening sleeve is communicated with the filling duct; and the hole opening plug and the hole closing plug are respectively matched with the hole opening sleeve and the upper rubber plug base. The utility model is mainly applied to the semi-stroke well cementing operation required to block cement injection at the upper part of a sieve tube in a completion well.
Description
Technical field
The utility model relates to oil gas well completion well cementing operation instrument, particularly at the half way cementing technology operation that requires the cementing packing of screen casing top in horizontal well sieve tube completion or the straight well sieve tube completion, belongs to the cementing tool class.
Background technology
Constantly progressive along with the protection oil reservoir completion technique that reduces to pollute, adopt not cementing of screen casing under the oil reservoir well section, and it is increasing only to carry out the well of half way well cementation completion in oil reservoir top well section.Present domestic oil field half way well shaft fixing technology commonly used all is to adopt the method that connects blind plate joint, external casing packer and hydraulic pressure stage cementing device on screen casing respectively.The problem that this method exists is need connect three instruments respectively just can finish the half way cementing operation, the strict coupling of each tool pressure system requirements, because product comes from the installation test of having finished shear screw before different manufacturers, common product dispatch from the factory detects, open operating pressure and determined to be difficult to adjust according to the well site actual conditions.Simultaneously, three instruments are installed respectively, the connect hours is long, the tool expense height.
Summary of the invention
It is a kind of simple to operate that the purpose of this utility model is to provide, the half way cementing tool of dependable performance.
The utility model mainly is made up of perforate plug 18, the stage cementing device assembly that closes stopple 19 and have a packer.Encircle 12 on the upper body 1 of stage cementing device, the packer, body 15 connects successively down, packer ring 16 down is enclosed within down on the body 15, and is connected with the lower end of packing element 14 on being enclosed within down body 15.Ring 12 inside are followed successively by from top to bottom and close borehole jack 4, perforate cover 10 on upper body 1 and packer.Shear pin 3,6 will close borehole jack 4 respectively, perforate cover 10 is fixed in the upper body 1, and the position upper body 1 of corresponding perforate cover 10 has radial direction through hole 5; Close borehole jack 4 inner chamber tops and be connected with the gluing obturating plug; Shear pin 9 is fixed on perforate with bottom plug seat 7 and overlaps 10 inner chambers; It is baffle ring 11 that 10 inner chamber bottoms are overlapped in perforate.Encircle filling duct 13 and filling valve system on 12 on the packer; Filling duct 13 is communicated with packing element 14 on the following body 15, and the pack hole 8 on the perforate cover 10 is connected with filling duct 13; The perforate plug of making by easy brill material 18 and to close stopple 19 suitable with perforate cover 10, gluing obturating plug 2 respectively.
The beneficial effects of the utility model are: the former stage cementing device, the fill-type external casing packer that use of connecting respectively united two into one by the design of optimizing structure.Saved simultaneously and used special blind plate joint, made entire tool compact conformation, installation connect easy to use.When guarantee realizing the half way well shaft fixing technology, saved tool materials expense, processing charges and shipping expense, compare with the half way well cementation completion practice of carrying out equally in the past and can reduce Completion cost.
Description of drawings
Fig. 1 is the utility model schematic diagram
Fig. 2 is the utility model perforate plug schematic diagram
Fig. 3 closes the stopple schematic diagram for the utility model
The specific embodiment
The utility model is described in more detail below in conjunction with accompanying drawing.
As shown in drawings, the utility model mainly is made up of perforate plug 18, the stage cementing device assembly that closes stopple 19 and have a packer.Encircle 12 on the upper body 1 of stage cementing device, the packer, body 15 connects successively down, packer ring 16 down is enclosed within down on the body 15, and is connected with the lower end of packing element 14 on being enclosed within down body 15.Ring 12 inside are followed successively by from top to bottom and close borehole jack 4, perforate cover 10 on upper body 1 and packer.Shear pin 3,6 will close borehole jack 4 respectively, perforate cover 10 is fixed in the upper body 1, and the position upper body 1 of corresponding perforate cover 10 has radial direction through hole 5; Close borehole jack 4 inner chamber tops and be connected with the gluing obturating plug; Shear pin 9 is fixed on perforate with bottom plug seat 7 and overlaps 10 inner chambers; It is baffle ring 11 that 10 inner chamber bottoms are overlapped in perforate.Encircle filling duct 13 and filling valve system on 12 on the packer; Filling duct 13 is communicated with packing element 14 on the following body 15, and the pack hole 8 on the perforate cover 10 is connected with filling duct 13; The perforate plug of making by easy brill material 18 and to close stopple 19 suitable with perforate cover 10, gluing obturating plug 2 respectively.In addition, encircling the stopping mechanism that cooperates with retaining ring 17 in addition on 16 under body 15, the packer down.Pass borehole jack 4, perforate cover 10 all have rotation-preventing mechanism.
Radial direction through hole 5 on the cementing device is overlapped 10 shutoff by perforate when going into well, only perforate plug 18 enter plug seat 7, and the intact packer of first filling after continue to sprain and just open after pressure is cut off shear pin 6.Closing of this radial direction through hole 5 is by closing after stopple 19 enters gluing obturating plug 2, pressures of spraining, cuts off shear pin 3, the descending realization of pass borehole jack (4).On perforate cover 10, use fixedly bottom plug seat 7 shutoff pack holes 8 of shear pin 9.After perforate plug 18 enters bottom plug seat 7, the turn on pump pressure of spraining, at first cut off shear pin 9 make bottom plug seat 7 with respect to perforate cover 10 move downward, pack hole 8 exposures.Fluid enters the 13 pairs of packers in filling duct by this hole and carries out filling expansion.The bottom plug seat 7 that moves downward stops when moving to baffle ring 11 places on the perforate cover 10, when packing element 14 by behind the abundant filling expansion, packer cuts out pack hole 13 automatically.Continuing to sprain this moment and pressing the downforce that forms to be delivered to perforate cover 10 and then be applied on the shear screw 6 by baffle ring 11, continue to sprain press when pressure reaches design load, this shear pin 6 cuts off, perforate is overlapped and 10 is moved down, radial direction through hole 5 exposures, can carry out cementing practice.Gluing obturating plug 2, bottom plug seat 7, back-up ring 11 and perforate plug 18 close stopple 20 to be made by easily boring material.Design has rotation-preventing mechanism on perforate cover 10, pass borehole jack 4.Under packer under body 15, the packer on the ring 16 design stopping mechanism is arranged, cooperates with retaining ring 17 make under the packer ring 16 can only be up can not be descending, the packing element 14 after the assurance expansion still can be brought into play the packing effect after pressure release.
Operating principle of the present utility model: this instrument is connected the topmost of horizontal well screen casing or straight well sieve tube completion pipe string, is the bunch tube that need carry out the cementing packing on instrument.When instrument down behind the design well depth, first turn on pump sets up circulation.The normal back of circulation, input perforate plug 18.When the perforate plug arrives instrument bottom plug seat 7, the turn on pump pressure of spraining, cut off shear pin 9.Perforate plug 18 is 7 descending with the bottom plug seat, be landed on the baffle ring 11 that links together with the perforate cover, packer top pack hole 8 exposes, fluid can enter packing element 14 by pack hole 8 and filling duct 13 it is carried out filling expansion.After packer fully expanded, design is pressure limiting valve system closing filling duct 13 protecting packers in the ring 12 on packer.Continue once more to sprain pressure, when pressure reaches shear pin 6 design loads, perforate plug 18,, radial direction through hole 5 exposures together descending with the perforate cover with bottom plug seat 7, circulation are set up once more.Just can carry out the cementing well construction by normal two stage cementing operation procedure this moment.The replacement of cement and bruising require to use special pass stopple 19.Raise, continue to sprain to press and cut off the shear pin 3 that closes on the borehole jack 4, close stopple 19 and close that borehole jack 4 is descending simultaneously, radial direction through hole 5 is closed, the half way well cementation is finished when closing stopple 19 when going downwards to gluing obturating plug 2, pressure.
Claims (3)
1. half way cementing tool, mainly form by perforate plug (18), the stage cementing device assembly that closes stopple (19) and have a packer, it is characterized in that: ring (12), following body (15) connect successively on the upper body of stage cementing device (1), the packer, packer down ring (16) is enclosed within down on the body (15), and is connected with the lower end of packing element (14) on being enclosed within down body (15); Ring (12) inside is followed successively by from top to bottom and closes borehole jack (4), perforate cover (10) on upper body (1) and packer; Shear pin (3,6) will close borehole jack (4) respectively, perforate cover (10) is fixed in the upper body (1), and the position upper body (1) of corresponding perforate cover (10) has radial direction through hole (5); Close borehole jack (4) inner chamber top and be connected with the gluing obturating plug; Shear pin (9) is fixed on perforate cover (10) inner chamber with bottom plug seat (7); Perforate cover (10) inner chamber bottom is baffle ring (11); Filling duct (13) and filling valve system are arranged on the ring (12) on the packer; Filling duct (13) is communicated with packing element (14) on the following body (15), and the pack hole (8) on the perforate cover (10) is connected with filling duct (13); The perforate plug of making by easy brill material (18) and to close stopple (19) suitable with perforate cover (10), gluing obturating plug (2) respectively.
2. half way cementing tool according to claim 1 is characterized in that: on the ring (16) stopping mechanism that cooperates with retaining ring (17) is being arranged under following body (15), the packer.
3. half way cementing tool according to claim 1 and 2 is characterized in that: pass borehole jack (4), perforate cover (10) all have rotation-preventing mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200087058U CN201206455Y (en) | 2008-03-20 | 2008-03-20 | Semi-cementing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200087058U CN201206455Y (en) | 2008-03-20 | 2008-03-20 | Semi-cementing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201206455Y true CN201206455Y (en) | 2009-03-11 |
Family
ID=40465522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200087058U Expired - Lifetime CN201206455Y (en) | 2008-03-20 | 2008-03-20 | Semi-cementing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201206455Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787824A (en) * | 2011-05-18 | 2012-11-21 | 中国石油化工集团公司 | Tool and method for injecting cement into top of horizontal well screen pipe without drilling and plugging |
| CN105507847A (en) * | 2014-09-25 | 2016-04-20 | 中国石油化工股份有限公司 | Apparatus and method for drill pipe plug field testing |
| CN107208470A (en) * | 2015-02-17 | 2017-09-26 | 哈利伯顿能源服务公司 | Grid seal pack device assembly and other downhole tools |
| CN112343540A (en) * | 2019-08-08 | 2021-02-09 | 中国石油化工股份有限公司 | Packing type staged cementing device, well cementation pipe column and well cementation method |
| CN112443289A (en) * | 2019-08-27 | 2021-03-05 | 中国石油化工股份有限公司 | Packing type stage cementing device |
| CN112443290A (en) * | 2019-08-28 | 2021-03-05 | 中国石油化工股份有限公司 | Anchoring packing cement surface control device and well cementation tubular column comprising same |
| CN117468888A (en) * | 2023-12-27 | 2024-01-30 | 中国石油集团川庆钻探工程有限公司 | Underground airtight plugging tool and plugging method |
-
2008
- 2008-03-20 CN CNU2008200087058U patent/CN201206455Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787824A (en) * | 2011-05-18 | 2012-11-21 | 中国石油化工集团公司 | Tool and method for injecting cement into top of horizontal well screen pipe without drilling and plugging |
| CN105507847A (en) * | 2014-09-25 | 2016-04-20 | 中国石油化工股份有限公司 | Apparatus and method for drill pipe plug field testing |
| CN105507847B (en) * | 2014-09-25 | 2018-05-08 | 中国石油化工股份有限公司 | A kind of apparatus and method for drilling rod rubber plug field test |
| CN107208470A (en) * | 2015-02-17 | 2017-09-26 | 哈利伯顿能源服务公司 | Grid seal pack device assembly and other downhole tools |
| CN107208470B (en) * | 2015-02-17 | 2020-11-13 | 哈利伯顿能源服务公司 | Lattice seal packer assembly and other downhole tools |
| CN112343540A (en) * | 2019-08-08 | 2021-02-09 | 中国石油化工股份有限公司 | Packing type staged cementing device, well cementation pipe column and well cementation method |
| CN112443289A (en) * | 2019-08-27 | 2021-03-05 | 中国石油化工股份有限公司 | Packing type stage cementing device |
| CN112443290A (en) * | 2019-08-28 | 2021-03-05 | 中国石油化工股份有限公司 | Anchoring packing cement surface control device and well cementation tubular column comprising same |
| CN117468888A (en) * | 2023-12-27 | 2024-01-30 | 中国石油集团川庆钻探工程有限公司 | Underground airtight plugging tool and plugging method |
| CN117468888B (en) * | 2023-12-27 | 2024-03-19 | 中国石油集团川庆钻探工程有限公司 | Underground airtight plugging tool and plugging method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090311 |
|
| CX01 | Expiry of patent term |