CN102041974A - Bypass short-circuit structure of abandoned deep water well cutting device and cementing plug method thereof - Google Patents
Bypass short-circuit structure of abandoned deep water well cutting device and cementing plug method thereof Download PDFInfo
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- CN102041974A CN102041974A CN2011100009962A CN201110000996A CN102041974A CN 102041974 A CN102041974 A CN 102041974A CN 2011100009962 A CN2011100009962 A CN 2011100009962A CN 201110000996 A CN201110000996 A CN 201110000996A CN 102041974 A CN102041974 A CN 102041974A
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Abstract
The invention discloses a bypass short-circuit structure of an abandoned deep water well cutting device and a cementing plug method thereof. In the bypass short-circuit structure, a bypass short-circuit body is provided with a central water hole and a bypass hole which are connected, wherein a piston part is arranged at the joint of the central water hole and the bypass hole, an upper guide channel connected with the bypass hole is formed between an upper communicating pipe and a mandrel; the piston part is provided with a via hole which is communicated with the central water hole and the centre hole of the mandrel; and a plugging part is arranged on the via hole and used to block the communication of the central water hole and the centre hole of the mandrel, and the plugging part is moved under the pressure of drilling fluid so as to contact the central water hole and the bypass hole. As the plugging part with the via hole is used, the cutting operation is not be affected; and after the cutting operation, the plugging part placed in a drilling tool is used to ensure that the central water hole switches to the upper guide channel state that the central water hole is connected with the outside of the mandrel. Therefore, the same device can be used to realize the operations of cutting, salvaging and cementing, the working efficiency of deep water drilling can be increased and the cost of deep water drilling and production can be reduced.
Description
Technical field
The present invention relates to deep water drilling implement field, in particular, what improvement related to is a kind of bypass short circuit structure and cementing plug operational method thereof of deep water abandoned well cutter sweep.
Background technology
In the process of deep water drilling operations such as offshore oil probing, according to an international practice, before not obtaining the approval of national government department, all forbid more than the mud line at well head place, staying any structure.Therefore, remove the outer wellhead that keeps through application individually, most prospect pits all will be with the underwater well head head system from cutting off below the mud line and reclaiming after task is finished, to eliminate the legacy more than the well head place mud line, this just need use deep water abandoned well cutter sweep.
But, surpass 300 meters even 1000 meters or the sea oil drilling and production operation field when darker in the depth of water, present China also is in the starting stage, the domestic special equipment that does not still have independent intellectual property right, what rely on all is to rent external special equipment, has formed the monopolization situation domestic to China; Not only rent and high is used up a large amount of national foreign exchanges, nor is beneficial to the development need of Chinese domestic sea oil drilling and production industry.
Even for the external special equipment that China rents, its cutting and the operation of reclaiming the underwater well head structure are carried out the operation of cementing plug with following drilling rod, also are that subset carries out separate operaton, and cost is higher and efficient is also lower.
Therefore, prior art still haves much room for improvement and develops.
Summary of the invention
The objective of the invention is to, a kind of bypass short circuit structure and cementing plug operational method thereof of deep water abandoned well cutter sweep is provided, cutting, salvaging and cementing are finished by same device, improve deep water drilling operation efficient greatly, reduce deep water drilling cost.
Technical scheme of the present invention is as follows: a kind of bypass short circuit structure of deep water abandoned well cutter sweep comprises: bypass short circuit body, last communicating pipe, mandrel, piston piece and type of tamper evidence; Bypass short circuit body is provided with center hydrophthalmia and the by-pass prot that is connected; Piston piece is arranged on the junction of center hydrophthalmia and by-pass prot, is used to block being communicated with of center hydrophthalmia and by-pass prot; Formed the last flow-guiding channel that is connected with by-pass prot between the inwall of last communicating pipe and the outer wall of mandrel; Piston piece is provided with the via hole of connection center hydrophthalmia and mandrel centre bore; Type of tamper evidence is arranged on the via hole, is used to block being communicated with of center hydrophthalmia and mandrel centre bore, and under the pressure effect of drilling fluid mobile piston piece, conducting center hydrophthalmia and by-pass prot.
The bypass short circuit structure of described deep water abandoned well cutter sweep, wherein: the center hydrophthalmia is positioned at the center of bypass short circuit body, along the axial setting of bypass short circuit body; By-pass prot is along the radially setting of bypass short circuit body, and an end of by-pass prot is connected with the center hydrophthalmia, and the other end is arranged on the outer wall of bypass short circuit body.
The bypass short circuit structure of described deep water abandoned well cutter sweep, wherein: the downward-sloping setting of by-pass prot.
The bypass short circuit structure of described deep water abandoned well cutter sweep, wherein: the inside of center hydrophthalmia is provided with step, and piston piece fits in the position of step top.
The bypass short circuit structure of described deep water abandoned well cutter sweep, wherein: on bypass short circuit body, be horizontally arranged with pin-and-hole; Piston piece is fixed on the inwall of center hydrophthalmia via the shear pin that fits in the pin-and-hole.
The bypass short circuit structure of described deep water abandoned well cutter sweep, wherein: type of tamper evidence is a spheroid; The external diameter of spheroid is greater than the via hole internal diameter of piston piece, less than the internal diameter of bypass short circuit body.
The bypass short circuit structure of described deep water abandoned well cutter sweep, wherein: on bypass short circuit body, be arranged with sealing cap; End in last communicating pipe is welded with upper flange plate; Upper flange plate is connected on the sealing cap via bolt.
The bypass short circuit structure of described deep water abandoned well cutter sweep, wherein: the inwall of going up sealing cap is provided with the inboard wall groove that is used to hold sealing ring more than the twice; The last sealing cap end face that is connected with upper flange plate is provided with the end face groove that is used to hold sealing ring.
The method that a kind of bypass short circuit structure of utilizing above-mentioned deep water abandoned well cutter sweep is carried out the cementing plug operation wherein, may further comprise the steps:
Drop into type of tamper evidence from the drilling tool top, type of tamper evidence is stuck on the via hole of piston piece, and the center hydrophthalmia of blocking-up bypass short circuit body is connected with the mandrel centre bore;
Strengthen the pressure of drilling fluid, piston piece is descending up to promoting, and the by-pass prot on the conducting bypass short circuit body is connected with the center hydrophthalmia;
Drilling fluid enters the formed flow-guiding channel of going up between the outer wall of the inwall of last communicating pipe and mandrel via by-pass prot;
After last flow-guiding channel is got through, cement injection.
The method that the described bypass short circuit structure of utilizing deep water abandoned well cutter sweep is carried out the cementing plug operation, wherein: type of tamper evidence dropped into before the pressure that strengthens drilling fluid.
The bypass short circuit structure of a kind of deep water abandoned well cutter sweep provided by the present invention and cementing plug operational method thereof, owing to adopted the piston piece of band via hole, cutting operation is not exerted an influence, and after cutting operation is finished, utilize the type of tamper evidence that drops in the drilling tool, increase the pressure of drilling fluid in the time of shutoff, to reach mobile piston spare and to open by-pass prot, the centre bore state that is communicated with mandrel inside when making the center hydrophthalmia from cutting operation, be converted to the last flow-guiding channel state that is communicated with the mandrel outside, and blocked cement and on drilling tool, enter screw motor; Thereby realized finishing cutting, salvaging and cemented operation, improved the industry efficient that the deep water probing is done greatly, also reduced the cost of deep water drilling by same device.Especially offshore oil probing field had important practical value.
Description of drawings
Fig. 1 is the sectional view of bypass short circuit structure before inserting steel ball of deep water abandoned well cutter sweep of the present invention.
Fig. 2 is the sectional view of bypass short circuit structure after inserting steel ball of deep water abandoned well cutter sweep of the present invention.
The specific embodiment
Below with reference to accompanying drawing, the specific embodiment of the present invention and embodiment are described in detail, described specific embodiment in order to explain the present invention, is not to be used to limit the specific embodiment of the present invention only.
The bypass short circuit structure of a kind of deep water abandoned well cutter sweep of the present invention, one of its specific embodiment as shown in Figure 1, comprises bypass short circuit body 200, last communicating pipe 300, mandrel 100, piston piece 400 and type of tamper evidence 450; Bypass short circuit body 200 is provided with and connects center hydrophthalmia up and down 210 and be communicated with inside and outside by-pass prot 220; Center hydrophthalmia 210 setting that is connected with by-pass prot 220; Piston piece 400 is arranged on the inside of bypass short circuit body 200, is positioned at the junction of center hydrophthalmia 210 and by-pass prot 220, and the drilling fluid that is used for blocking-up center hydrophthalmia 210 when cutting operation flows out from by-pass prot 220; Last communicating pipe 300 is arranged on the outside of bypass short circuit body 200, the outer wall of the inwall of last communicating pipe 300 and the by-pass prot bypass short circuit body 200 below 220, and and the outer wall of mandrel 100 between, common last flow-guiding channel 320 when forming for cementing job; The lower end of bypass short circuit body 200 is connected on the mandrel 100 topmost, and center hydrophthalmia 210 is communicated with the centre bore 110 of mandrel 100 inside; Piston piece 400 is provided with the via hole 410 of connection center hydrophthalmia 210 and mandrel 100 centre bores 110, is used for when cutting operation drilling fluid being imported from the center hydrophthalmia 210 of bypass short circuit body 200 centre bore 110 of mandrels 100.
And before cementing job, as shown in Figure 2, type of tamper evidence 450 is arranged on via hole 410 upper ends of piston piece 400, enters mandrel 100 centre bores 110 with the blocking-up drilling fluid, and under the effect that increases drilling liquid pressure gradually, remove the restriction of certain connector such as pin, bolt or spring or local solder joint to piston piece 400, for example, the shear pin that is used for fixing piston piece 400 is cut off, and causes piston piece 400 descending, with conducting center hydrophthalmia 210 and by-pass prot 220, can carry out cementing job; At this moment, type of tamper evidence 450 still is positioned at the upper end of piston piece 400, enters the centre bore 110 of mandrel 100 from via hole 410 with shutoff cement; Cement enters the last flow-guiding channel 320 of mandrel 100 outsides and passes to the drilling tool of bottom from by-pass prot 220, to finish the task of cementing plug; Thereby prevented in the cementing job process that cement enters the motor of below from the drilling tool upper end, has avoided cement that motor is caused damage.
Compare with existing external deep water abandoned well cutter sweep, the bypass short circuit structure of deep water abandoned well cutter sweep provided by the present invention owing to adopted the piston piece 400 of band via hole 410, does not exert an influence to cutting operation; And after cutting operation is finished, utilize the type of tamper evidence 450 that drops in the drilling tool, increase the pressure of drilling fluid in the time of shutoff, to reach mobile piston spare 400 and to open by-pass prot 220, centre bore 110 states that are communicated with mandrel 100 inside when making center hydrophthalmia 210 from cutting operation, be converted to last flow-guiding channel 320 states that are communicated with mandrel 100 outsides, and blocked cement and on drilling tool, enter screw motor; Thereby realized finishing cutting, salvaging and cemented operation, improved the operating efficiency of deep water probing greatly, also reduced the cost of deep water drilling by same device.Especially offshore oil probing field had important practical value.
Bypass short circuit structure based on above-mentioned deep water abandoned well cutter sweep, the invention allows for the method that a kind of bypass short circuit structure of utilizing this deep water abandoned well cutter sweep is carried out the cementing plug operation, one of its specific embodiment, may further comprise the steps: drop into type of tamper evidence from the drilling tool top, type of tamper evidence 450 falls from the center hydrophthalmia 210 of bypass short circuit body 200, be stuck on the via hole 410 of piston piece 400, the center hydrophthalmia 210 of blocking-up bypass short circuit body 200 is connected with mandrel 100 centre bores 110; And the pressure of increasing drilling fluid, piston piece 400 is descending up to promoting, and the by-pass prot 220 on the conducting bypass short circuit body 200 is connected with center hydrophthalmia 210; As shown in Figure 2, drilling fluid enters the formed flow-guiding channel 320 of going up between the outer wall of the inwall of last communicating pipe 300 and mandrel 100 via by-pass prot 220; After last flow-guiding channel is got through, cement injection.Type of tamper evidence 450 dropped into drilling tool centre bore 110 to cementing job after cutting operation is finished; And, specifically can before injecting drilling fluid, drop into, also can before the pressure that strengthens drilling fluid, drop into.
Compare with the method for existing external cementing plug operation, the method that the bypass short circuit structure of utilizing deep water abandoned well cutter sweep that the present invention proposes is carried out the cementing plug operation, because the equipment when having adopted cutting operation carries out cementing job, not only need not change implement, saved material cost, and the dismounting and the replacing time of equipment, the time of having saved Global Operation have greatly been avoided.Especially offshore oil probing field had important practical value.
In the preferred implementation of the bypass short circuit structure of deep water abandoned well cutter sweep of the present invention and cementing plug operational method thereof, as shown in Figure 1, center hydrophthalmia 210 is positioned at the center of bypass short circuit body 200, along the axial setting of bypass short circuit body 200; By-pass prot 220 is along the radially setting of bypass short circuit body 200, and an end of by-pass prot 220 is connected with center hydrophthalmia 210, and the other end is arranged on the outer wall of bypass short circuit body 200.
Preferably, by-pass prot 220 downward-sloping settings.In addition, by-pass prot 220 also can be horizontally disposed with.But the cementing effect of downward-sloping setting is effective more a lot of than horizontally disposed cementing.
Further, the inside of center hydrophthalmia 210 is provided with step, and piston piece 400 fits in the position of step top.In other words, center hydrophthalmia 210 is a stepped hole, and the aperture of upper end is greater than the aperture of lower end, the external diameter of the big or small adaptive piston piece 400 in aperture, upper end, the length in aperture, upper end, or by-pass prot 220 is positioned at the position of upper end hole wall, the height when surpassing piston piece 400 and falling.
Concrete, on bypass short circuit body 200, be horizontally arranged with pin-and-hole 230; Piston piece 400 is fixed on the inwall of center hydrophthalmia 210 via the shear pin 231 that fits in the pin-and-hole 230.In addition, this shear pin 231 also can adopt soket head cap screw or cut off key and replace.Thus, type of tamper evidence 450 is blocked in via hole 410 upper ends of piston piece 400, under the pressure effect of the drilling fluid that increases gradually, shear pin 231 fractures, piston piece 400 and type of tamper evidence 450 are displaced downwardly to the bottom of stepped hole, expose by-pass prot 220, have been communicated with center hydrophthalmia 210 and last flow-guiding channel 320.
Preferably, type of tamper evidence 450 is a spheroid, for example: Metal Ball such as steel ball, perhaps nonmetal ball such as stone ball; The external diameter of spheroid is greater than the internal diameter of piston piece 400 via holes 410, less than the internal diameter of bypass short circuit body 200.
Be preferably, the via hole of piston piece 400 is provided with chamfering for 410 mouthfuls, and the shape of chamfering can be the inclined-plane, also can be the cambered surface of adaptive radius of sphericity.
Further, on bypass short circuit body 200, be arranged with sealing cap 340; Be welded with upper flange plate 330 in the end of last communicating pipe 300; Upper flange plate 330 is connected on the sealing cap 340 via bolt.Be preferably, upper flange plate and the junction of last communicating pipe 300 are provided with reinforcing rib.
Concrete, as shown in Figure 1, on the outer wall of bypass short circuit body 200, back-up ring 350 can be set, back-up ring 350 is fixed on the bypass short circuit body 200 via pin, and an end of last sealing cap 340 is stuck on the back-up ring 350, and the other end is connected with upper flange plate 330.
Be preferably, the inwall of last sealing cap 340 is provided with the inboard wall groove that is used to hold sealing ring more than the twice; Last sealing cap 340 end faces that are connected with upper flange plate 330 are provided with the end face groove that is used to hold sealing ring.
Industrial applicibility
In deep water probing and drilling field, the bypass short circuit structure of deep water abandoned well cutter sweep of the present invention and cementing plug operational method thereof are independent research fully, can be described as to have filled up a Chinese domestic blank; And the China sea water front is longer, and the marine site of bordering on the sea is vast, for the development of the domestic sea oil drilling and production industry of China, and the monopoly position of breaking external colleague, all have important intellectual property strategy and be worth.
Should be understood that; the above only is preferred embodiment of the present invention; be not sufficient to limit technical scheme of the present invention; for those of ordinary skills; within the spirit and principles in the present invention; can be increased and decreased according to the above description, replacement, conversion or improvement; for example; replace steel ball with the upper end that is blocked in piston piece 400 via holes 410 etc. with cone; and all these increases and decreases, replacement, conversion or improve after technical scheme, all should belong to the protection domain of claims of the present invention.
Claims (10)
1. the bypass short circuit structure of a deep water abandoned well cutter sweep is characterized in that, comprising: bypass short circuit body, last communicating pipe, mandrel, piston piece and type of tamper evidence; Bypass short circuit body is provided with center hydrophthalmia and the by-pass prot that is connected; Piston piece is arranged on the junction of center hydrophthalmia and by-pass prot, is used to block being communicated with of center hydrophthalmia and by-pass prot; Formed the last flow-guiding channel that is connected with by-pass prot between the inwall of last communicating pipe and the outer wall of mandrel; Piston piece is provided with the via hole of connection center hydrophthalmia and mandrel centre bore; Type of tamper evidence is arranged on the via hole, is used to block being communicated with of center hydrophthalmia and mandrel centre bore, and under the pressure effect of drilling fluid mobile piston piece, conducting center hydrophthalmia and by-pass prot.
2. the bypass short circuit structure of deep water abandoned well cutter sweep according to claim 1, it is characterized in that: the center hydrophthalmia is positioned at the center of bypass short circuit body, along the axial setting of bypass short circuit body; By-pass prot is along the radially setting of bypass short circuit body, and an end of by-pass prot is connected with the center hydrophthalmia, and the other end is arranged on the outer wall of bypass short circuit body.
3. the bypass short circuit structure of deep water abandoned well cutter sweep according to claim 2 is characterized in that: the downward-sloping setting of by-pass prot.
4. the bypass short circuit structure of deep water abandoned well cutter sweep according to claim 1, it is characterized in that: the inside of center hydrophthalmia is provided with step, and piston piece fits in the position of step top.
5. the bypass short circuit structure of deep water abandoned well cutter sweep according to claim 1 is characterized in that: be horizontally arranged with pin-and-hole on bypass short circuit body; Piston piece is fixed on the inwall of center hydrophthalmia via the shear pin that fits in the pin-and-hole.
6. the bypass short circuit structure of deep water abandoned well cutter sweep according to claim 1 is characterized in that: type of tamper evidence is a spheroid; The external diameter of spheroid is greater than the internal diameter of piston piece via hole, less than the internal diameter of bypass short circuit body.
7. the bypass short circuit structure of deep water abandoned well cutter sweep according to claim 1 is characterized in that: be arranged with sealing cap on bypass short circuit body; End in last communicating pipe is welded with upper flange plate; Upper flange plate is connected on the sealing cap via bolt.
8. the bypass short circuit structure of deep water abandoned well cutter sweep according to claim 7 is characterized in that: the inwall of going up sealing cap is provided with the inboard wall groove that is used to hold sealing ring more than the twice; The last sealing cap end face that is connected with upper flange plate is provided with the end face groove that is used to hold sealing ring.
9. the method that the bypass short circuit structure of utilizing arbitrary described deep water abandoned well cutter sweep in the claim 1 to 8 is carried out the cementing plug operation is characterized in that, may further comprise the steps:
Drop into type of tamper evidence from the drilling tool top, type of tamper evidence is stuck on the via hole of piston piece, and the center hydrophthalmia of blocking-up bypass short circuit body is connected with the mandrel centre bore;
Strengthen the pressure of drilling fluid, piston piece is descending up to promoting, and the by-pass prot on the conducting bypass short circuit body is connected with the center hydrophthalmia;
Drilling fluid enters the formed flow-guiding channel of going up between the outer wall of the inwall of last communicating pipe and mandrel via by-pass prot;
After last flow-guiding channel is got through, cement injection.
10. the method that the bypass short circuit structure of utilizing deep water abandoned well cutter sweep according to claim 9 is carried out the cementing plug operation is characterized in that: type of tamper evidence dropped into before the pressure that strengthens drilling fluid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110000996 CN102041974B (en) | 2011-01-05 | 2011-01-05 | Bypass short-circuit structure of abandoned deep water well cutting device and cementing plug method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110000996 CN102041974B (en) | 2011-01-05 | 2011-01-05 | Bypass short-circuit structure of abandoned deep water well cutting device and cementing plug method thereof |
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| CN102041974A true CN102041974A (en) | 2011-05-04 |
| CN102041974B CN102041974B (en) | 2013-07-31 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603628A (en) * | 2013-12-11 | 2014-02-26 | 中国石油集团川庆钻探工程有限公司 | Injecting-plugging method during under-well work |
| CN109505557A (en) * | 2018-12-19 | 2019-03-22 | 贵州高峰石油机械股份有限公司 | A kind of device for being completed at the same time sub-sea drilled wells and salvaging with capping operation |
| CN110359873A (en) * | 2019-07-05 | 2019-10-22 | 中国石油天然气集团有限公司 | A kind of underground stub cable cutter and its application method |
| CN114876392A (en) * | 2022-05-06 | 2022-08-09 | 中国石油大学(北京) | Annular pressure loss control device for well drilling |
| CN115110912A (en) * | 2022-08-01 | 2022-09-27 | 中国海洋大学 | Construction device for offshore oil well sealing and working method thereof |
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| CN2199307Y (en) * | 1994-03-17 | 1995-05-31 | 李学军 | Device for overcoming U-tube effect in pouring cement |
| CN2284296Y (en) * | 1997-01-30 | 1998-06-17 | 胜利石油管理局胜利采油厂 | Oil discharger of electrical submersible pump |
| CN201386539Y (en) * | 2008-11-20 | 2010-01-20 | 吐哈石油勘探开发指挥部工程技术研究院 | Fracture used high-pressure sand blast sliding sleeve |
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| US4709760A (en) * | 1981-10-23 | 1987-12-01 | Crist Wilmer W | Cementing tool |
| CN2199307Y (en) * | 1994-03-17 | 1995-05-31 | 李学军 | Device for overcoming U-tube effect in pouring cement |
| CN2284296Y (en) * | 1997-01-30 | 1998-06-17 | 胜利石油管理局胜利采油厂 | Oil discharger of electrical submersible pump |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603628A (en) * | 2013-12-11 | 2014-02-26 | 中国石油集团川庆钻探工程有限公司 | Injecting-plugging method during under-well work |
| CN103603628B (en) * | 2013-12-11 | 2017-01-18 | 中国石油集团川庆钻探工程有限公司 | Injecting-plugging method during under-well work |
| CN109505557A (en) * | 2018-12-19 | 2019-03-22 | 贵州高峰石油机械股份有限公司 | A kind of device for being completed at the same time sub-sea drilled wells and salvaging with capping operation |
| CN109505557B (en) * | 2018-12-19 | 2023-10-31 | 贵州高峰石油机械股份有限公司 | Device for simultaneously completing fishing and well sealing operation of submarine oil well |
| CN110359873A (en) * | 2019-07-05 | 2019-10-22 | 中国石油天然气集团有限公司 | A kind of underground stub cable cutter and its application method |
| CN114876392A (en) * | 2022-05-06 | 2022-08-09 | 中国石油大学(北京) | Annular pressure loss control device for well drilling |
| CN114876392B (en) * | 2022-05-06 | 2022-12-30 | 中国石油大学(北京) | Annular pressure loss control device for well drilling |
| CN115110912A (en) * | 2022-08-01 | 2022-09-27 | 中国海洋大学 | Construction device for offshore oil well sealing and working method thereof |
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