CN201581858U - Multi-stage cementing unit - Google Patents
Multi-stage cementing unit Download PDFInfo
- Publication number
- CN201581858U CN201581858U CN2009202489248U CN200920248924U CN201581858U CN 201581858 U CN201581858 U CN 201581858U CN 2009202489248 U CN2009202489248 U CN 2009202489248U CN 200920248924 U CN200920248924 U CN 200920248924U CN 201581858 U CN201581858 U CN 201581858U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- cover
- closable
- openable
- close
- 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.)
- Expired - Fee Related
Links
- 238000010008 shearing Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 238000007789 sealing Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 208000004141 microcephaly Diseases 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a multi-stage cementing unit, which consists of an upper coupling, a body, a closable plug seat, seal rings, a closable sleeve, a snap spring, shearing nails, an openable plug seat, a circulating hole, an openable sleeve, a snap spring groove, a relief ring and a lower coupling; the upper and the lower ends of the body are respectively connected with the upper and the lower couplings, the middle part of the body is provided with the circulating hole, the closable sleeve, the openable sleeve and the relief ring are arranged sequentially from the top down on the inner side, and are respectively fixed by the shearing nails; the closable plug seat is arranged in the closable sleeve, the openable plug seat is arranged in the openable sleeve, the seal rings are respectively arranged in the seal grooves of the outer sides of the closable sleeve and the openable sleeve, the outer side of the closable sleeve is provided with the snap spring, and the inner side of the lower part of the body is provided with the snap spring groove. The multi-stage cementing unit has the advantages of reasonable design, simple structure, convenient use and reliable operation; when being utilized to carry out multi-stage cementation, the multi-stage cementing unit can effectively solve the problem that the micro-cavity liquid is not compressed and that the closable sleeve is not fully closed, consequently, cementation can be successful in one step, and the cementing quality can be greatly increased.
Description
Technical field:
The utility model relates to a kind of ore deposit, ground, oil drilling well cementation instrument of being used for, and belongs to the petroleum drilling technology class.
Background technology:
In the completion process, the stage cementing well cementation device that adopts usually at present mainly contains two kinds.A kind of is that pressured difference is opened circulation port, and it is unusual very easily to occur annular pressure in complicated well, usually takes place to open in advance or do not open, thereby causes first order cementing failure; Another kind is to build the pressure by opening the choked flow of cover gravity plug, promotes sliding sleeve and opens circulation port, builds the pressure and closes cover, close circulation port, because the microcavity liquid compression amount of closing between cover and the gravity plug is minimum, close cover and be difficult to be pressed onto the position, cause blow-by or seal relatively poor, cause and close the circulation port failure, therefore, can only build the pressure usually to wait and coagulate, make between sleeve pipe and the cement sheath and form the microgap, cause outer blow-out of sleeve pipe and interlayer to be scurried mutually, have a strong impact on oil well sealing quality and sealing.
The utility model content: the purpose of this utility model be to provide a kind of simple in structure, easy to use, can effectively solve microcavity liquid compression amount minimum, close the stage cementing well cementation device that cover is closed difficult problem.
The utility model is to realize like this, this kind cementing well device by top connection, body, close obturating plug, joint ring, close cover, jump ring, shearing nail, open obturating plug, circulation port, open cover, jump ring groove, pressure-reducing ring, lower contact form, its structure, assembled relation is as follows: the body upper and lower end is connected with top connection, lower contact with screw thread respectively, the middle part is provided with circulation port, the inboard is provided with and closes cover, opens cover and pressure-reducing ring from top to bottom successively, and fixing with shearing nail respectively; Close to be provided with in the cover and close obturating plug, open to be provided with in the cover and open obturating plug, close cover, open in the seal groove of the cover outside and be respectively equipped with joint ring, close the cover outside and be provided with jump ring, the body lower inside is provided with the jump ring groove.During the cementing operation operation, after this device arrives the pre-location of well down with sleeve pipe, carry out circulation well cleanup, the one-level cementing promotes the bruising to the support seat of bunch tube bottom of flexible plug for mud, well head is put pressure, the choked flow sealing is effectively inserted the gravity plug, and the sliding opening cover that builds the pressure in the pipe after gravity plug whereabouts is sitting in and opens on the obturating plug is sheared nail, shearing slides after nail is sheared is sitting in the pressure-reducing ring upper end, circulation port exposes on opening obturating plug, and pipe is inside and outside to be communicated with, and can carry out the well-flushing second time, cementing, promote to close the plug seat in closing on the obturating plug for mud, shear nail and shear back sliding closing cover, be sitting in and open the set upper side, be pressurized to one regularly, shear nail and shear, pressure-reducing ring moves down and is sitting in the lower contact upper end, closes cover and closes circulation port, be arranged on the jump ring and the body jump ring groove engagement realization circulation port of closing on the cover outer and forever close sealing, stop annular space second level cement paste to return in the sleeve pipe, reach the cement paste normal pressure and wait with fixed attention, finish the cementing well construction operation.
The utility model is reasonable in design, simple in structure, easy to use, reliable operation, utilize it to carry out multistage cementing, close cover and close very reliably, can effectively solve microcavity liquid and not compress and close the difficult problem that is not closed completely of cover, after finishing second level cementing and replacing, the moulding plug is closed cover, the back permanent seal that thes cement solidifies is fixed, and guarantees the cementing success, and can improve cementing quality greatly.
Description of drawings: accompanying drawing is a structural representation of the present utility model.
The specific embodiment: enforcement of the present utility model is illustrated below in conjunction with accompanying drawing.
As shown in drawings, the utility model by top connection 1, body 2, close obturating plug 3, joint ring 4, close cover 5, jump ring 6, shear nail 7, open obturating plug 8, circulation port 9, open cover 10, shear nail 11, joint ring 12, jump ring groove 13, shear nail 14, pressure-reducing ring 15, lower contact 16 and form.Wherein, inside, top connection 1 major part upper end is provided with negative thread and the upper sleeve polyphone connects, the outside, two ends is provided with pin thread and is connected with body 2 that inside, two ends is equipped with negative thread under the microcephaly, outside, lower contact 16 two ends is equipped with pin thread, one end is connected with the body 2 that inside, two ends is equipped with negative thread, and the other end is connected with bunch tube.Body 2 circumferentially is evenly equipped with the circulation port 9 of 2～10 diameter 10～50mm, lower inside is provided with jump ring groove 13, the inside of body 2 is provided with pressure-reducing ring 15, fixing with body 2 with shearing nail 14, certain distance is provided with the sliding opening cover 10 that band is opened obturating plug 8 at an upper portion thereof, and is fixing with body 2 by shearing nail, between by joint ring 12 hermetically closing circulation ports 9, the top is provided with the sliding closing cover 5 that band is closed obturating plug 3, and is fixing with body 2 with shearing nail 7, therebetween by joint ring 4 sealings.
Claims (1)
1. stage cementing well cementation device, by top connection (1), body (2), close obturating plug (3), joint ring (4), close cover (5), jump ring (6), shear nail (7), open obturating plug (8), circulation port (9), open cover (10), shear nail (11), joint ring (12), jump ring groove (13), shearing are followed closely (14), pressure-reducing ring (15), lower contact (16) is formed; It is characterized in that: body (2) upper and lower end is connected with top connection (1), lower contact (16) with screw thread respectively, the middle part is provided with circulation port (9), the inboard from top to bottom is provided with successively and closes cover (5), opens cover (10) and pressure-reducing ring (15), and fixing with shearing nail respectively; Close to be provided with in the cover (5) and close obturating plug (3), open to be provided with in the cover (10) and open obturating plug (8), close cover (5), open in the seal groove of cover (10) outside and be respectively equipped with joint ring (12), be provided with jump ring (6) outside closing cover (5), body (2) lower inside is provided with jump ring groove (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202489248U CN201581858U (en) | 2009-11-27 | 2009-11-27 | Multi-stage cementing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202489248U CN201581858U (en) | 2009-11-27 | 2009-11-27 | Multi-stage cementing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201581858U true CN201581858U (en) | 2010-09-15 |
Family
ID=42723856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202489248U Expired - Fee Related CN201581858U (en) | 2009-11-27 | 2009-11-27 | Multi-stage cementing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201581858U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2009
- 2009-11-27 CN CN2009202489248U patent/CN201581858U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112443289B (en) * | 2019-08-27 | 2023-01-20 | 中国石油化工股份有限公司 | Packing type stage cementing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20121127 |