CN104088587B - For reducing sleeve pipe anti-collapse in drilling process - Google Patents
For reducing sleeve pipe anti-collapse in drilling process Download PDFInfo
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- CN104088587B CN104088587B CN201310110149.0A CN201310110149A CN104088587B CN 104088587 B CN104088587 B CN 104088587B CN 201310110149 A CN201310110149 A CN 201310110149A CN 104088587 B CN104088587 B CN 104088587B
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- sleeve pipe
- drilling process
- reducing sleeve
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Abstract
The invention discloses a kind of for reducing sleeve pipe anti-collapse in drilling process, including the sleeve body (1) curved by a monoblock elastic plate, the two ends of sleeve body (1) are built up overlapping section (2), and described overlapping section (2) is provided with and makes the sleeve body (1) can only toward the interface arrangment (3) of enlarged-diameter Direction distortion。This reducing sleeve pipe is anti-collapse and easy construction for the borehole wall of drilling process, use this reducing sleeve pipe can prevent hole collapse or stop the borehole wall collapse further thus reduce in drilling well safety problem, reduce drilling cost, ensure the exploration and development progress of petroleum resources。
Description
Technical field
The invention belongs to oil and gas well drilling engineering field, be specifically related to a kind of for reducing sleeve pipe anti-collapse in drilling process。
Background technology
Along with the degree of depth of petroleum exploration and development improves constantly, the difficulty of exploration and development increases day by day, and the complex formation situation run in drilling process gets more and more。When carrying out gas drilling operation when drill bit by these stratum of easily collapsing such as mud stone, sandstone and mud stone contact surface, coal seams, collapsing easily occur in well head or the borehole wall。If well head or the borehole wall cave in there will be the complex situations such as slacking off, chance card, burying。Not only bring safety problem, add drilling cost, and have a strong impact on the exploration and development progress of petroleum resources。
Particularly in ultra-deep well drilling process, get into when easily collapsing stratum, if collapsing further of the borehole wall can not be stoped in time, wait until that passage is blocked, drilling cost will be increased significantly, extend the drillng operation cycle。Sometimes also need to gas drilling converts to foam drilling or converts the drilling fluid drilling well of routine to, the operating mode being suitable for due to gas drilling, foam drilling and drilling fluid drilling well is different, the operating mode of suitable gas drilling well is after changing foam drilling or drilling fluid drilling well into, it is easy to bring very big inconvenience to construction。
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of for anti-collapse in ultradeep well and easy construction reducing sleeve pipe, use this reducing sleeve pipe can prevent hole collapse or stop the borehole wall collapse further thus reduce in drilling well safety problem, reduce drilling cost, ensure the exploration and development progress of petroleum resources。
The technical solution of the present invention is, there is provided a kind of have following structure for reducing sleeve pipe anti-collapse in drilling process, including the sleeve body curved by a monoblock elastic plate, the two ends of sleeve body are built up overlapping section, and described overlapping section is provided with and makes the sleeve body can only toward the interface arrangment of enlarged-diameter Direction distortion。
Compared with prior art, the having the following advantages for anti-collapse reducing sleeve pipe in drilling process of the present invention。In the present invention, sleeve body can only to enlarged-diameter Direction distortion under the restriction of interface arrangment。Sleeve body can be provided with the restrained deformation structures such as clip before use。When drilling process runs into easily collapse stratum time, by putting into, under the reducing sleeve pipe that to be used in drilling process anti-collapse of the present invention, the layer that easily collapses, the restrained deformation structures such as clip are unclamped。Owing to sleeve body is curved by a monoblock elastic plate, sleeve body is toward the Direction distortion of enlarged-diameter in the presence of a tensile force。The outer wall of sleeve body is close to the borehole wall, thus reaching prevent hole collapse or stop the purpose collapsed further of the borehole wall in time。Due to easy construction of the present invention, energy is anti-collapse and stops collapsing further of the borehole wall, it is thus possible to the exploration and development progress reducing the safety problem brought because of hole collapse, reducing drilling cost, guarantee petroleum resources。
As a kind of specific embodiment of the present invention, described interface arrangment includes being located at the buckle of sheet material one end and being located at the draw-in groove of the sheet material other end。Draw-in groove and buckle structure are simple, it is easy to realize making the sleeve body can only toward the purpose of enlarged-diameter Direction distortion by the cooperation of buckle and draw-in groove。
As a modification of the present invention, described draw-in groove includes the locking surface moved for the inclined plane that buckle moves with restriction buckle。The direction that locking surface restriction buckle reduces toward sleeve body diameter is moved, thus limiting the Direction distortion that sleeve body reduces toward diameter。Buckle can only move along inclined plane, and now sleeve body is toward the Direction distortion of enlarged-diameter。
As the another kind of improvement of the present invention, the inclined angle alpha of described inclined plane is 10 °～45 °。Inclined angle alpha is too little, not only adds man-hour less convenient, and in order to excessively mild, inclined plane length to extend, and further resulting in overlapping segment length increases。Inclination angle is too big, easily occurs producing because of excessively not mild the phenomenon of vibration during sleeve body enlarged-diameter。
The one that also has as the present invention is improved, and is provided with several described draw-in grooves, and wherein the inclination angle of the inclined plane of each described draw-in groove reduces along the enlarged-diameter direction of sleeve body。When sleeve body is toward enlarged-diameter Direction distortion, inclination angle is more and more less, and the resistance being subject to is more and more less and excessively milder。Contrary, it is increasing that sleeve body reduces, toward diameter, the resistance that direction is subject to。The Direction distortion that sleeve body reduces is made toward diameter only by instrument。
Another kind as the present invention is preferred, and described card is buckled with two, and two cards be located in same one end of sheet material and lay respectively at the initial of described overlapping section and end。Two buckles can realize multiple diameter with multiple card slot fit, is conveniently used for the borehole wall of different-diameter。
As the another kind of specific embodiment of the present invention, described interface arrangment includes setting up separately the first sawtooth in sheet material one end and the second sawtooth with the first jigsaw fit。First sawtooth and the second jigsaw fit easily realize sleeve body can only toward the purpose of enlarged-diameter Direction distortion。And the first sawtooth and the second sawtooth are easily worked and realize。
A kind of preferred as also having of the present invention, described first sawtooth and the second sawtooth are asymmetric sawtooth。Can realize sleeve body by asymmetric sawtooth can only toward enlarged-diameter Direction distortion, and asymmetric sawtooth reduces locking when direction is moved in sleeve body toward diameter。
A kind of preferred as also having of the present invention, the length of described overlapping section accounts for the 5%～15% of strip width。The length of overlapping section is too short, it is easy to occur that during toward enlarged-diameter Direction distortion, caliber expands little, does not reach the strong support of the borehole wall。The length of overlapping section is oversize, adds cost。And the too long of sleeve body of the length of the section of overlapping for the borehole wall of major diameter time, expand toward enlarged-diameter Direction distortion slow, do not reach the purpose quickly supporting the borehole wall toward enlarged-diameter Direction distortion。
Except advantages described above, the present invention also has the advantage that for anti-collapse reducing sleeve pipe in drilling process
1. the reducing sleeve pipe of the present invention toward the bore after enlarged-diameter Direction distortion and former borehole size very close to, there is reducing of borehole diameter hardly, will not hinder drill bit normal through。
2. the reducing sleeve pipe of the present invention is after enlarged-diameter Direction distortion, and sleeve body is close to the borehole wall, reaches closure and prevents the purpose of cave-in。Thering is provided suitable borehole wall condition for gas drilling, thus being effectively improved bit speed, shortening drilling well and well construction period。
3. the reducing sleeve pipe lower going-into-well of the present invention is at the moment without being hanging to upper strata sleeve pipe, it is possible to directly carry out toward the enlarged-diameter Direction distortion rear support borehole wall near the layer that collapses of barefoot interval。Reduce construction risk and difficulty of construction, reduce construction cost。
4. the reducing sleeve pipe of the present invention rely on self elastic force and intensity automatically with the layer that collapses near the borehole wall be in close contact, and make the gas landwaste originally acting on the borehole wall act on the inwall of reducing sleeve pipe of the present invention。Reducing sleeve pipe without the casting cement present invention just can reach to protect the purpose of the borehole wall and well cementation。
5. the reducing sleeve pipe of the present invention does not need additionaling power in expanding process, has simple in construction, easy construction, expanding success rate is high, energy consumption is low advantage。
Accompanying drawing explanation
It it is the present invention a kind of specific embodiment for reducing sleeve pipe anti-collapse in drilling process shown in Fig. 1。
It it is the present invention another kind of specific embodiment for reducing sleeve pipe anti-collapse in drilling process shown in Fig. 2。
Shown in figure: 1, sleeve body, 2, overlapping section, 3, interface arrangment, 3.1, buckle, 3.2, draw-in groove, 3.2.1, inclined plane, 3.2.2, locking surface, the 3.3, first sawtooth, the 3.4, second sawtooth。
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described。
The present invention is used for reducing sleeve pipe anti-collapse in drilling process, including the sleeve body 1 curved by a monoblock elastic plate, the two ends of sleeve body 1 are built up overlapping section 2, and described overlapping section 2 is provided with and makes the sleeve body 1 can only toward the interface arrangment 3 of enlarged-diameter Direction distortion。
Fig. 1 show a kind of specific embodiment of the present invention。In this embodiment, described interface arrangment 3 includes the buckle 3.1 being located at sheet material one end and the draw-in groove 3.2 being located at the sheet material other end。
Described draw-in groove 3.2 includes for the inclined plane 3.2.1 that buckle 3.1 the moves locking surface 3.2.2 moved with restriction buckle 3.1。Described inclined plane 3.2.1 and locking surface 3.2.2 connects through plane。Described inclined plane 3.2.1, locking surface 3.2.2 and plane constitute the draw-in groove 3.2 of depression。Described draw-in groove 3.2 can be one or more。
The inclined angle alpha of described inclined plane 3.2.1 is 10 °～45 °。
In a unshowned embodiment, being provided with several described draw-in grooves 3.2, wherein the inclination angle of the inclined plane 3.2.1 of each described draw-in groove 3.2 reduces along the enlarged-diameter direction of sleeve body 1。When sleeve body 1 is toward enlarged-diameter Direction distortion, owing to the inclination angle of the inclined plane 3.2.1 of each draw-in groove 3.2 is more and more less, the resistance that therefore sleeve body 1 is subject to diminishes, and causes that deformation is rapider。
In the embodiment shown in fig. 1, described buckle 3.1 has two, and two buckles 3.1 are located at same one end of sheet material and lay respectively at the initial of described overlapping section 2 and end。
Fig. 2 show the another kind of specific embodiment of the present invention。In this embodiment, described interface arrangment 3 includes the first sawtooth 3.3 set up separately in sheet material one end and the second sawtooth 3.4 coordinated with the first sawtooth 3.3。
Described first sawtooth 3.3 and the second sawtooth 3.4 are asymmetric sawtooth。Asymmetric sawtooth refers to saw-tooth apex both sides about asymmetric by the axis on summit。By arranging this asymmetric sawtooth so that sleeve body 1 is only along the deformation making its enlarged-diameter direction。
In fig. 1 and 2, the length of described overlapping section 2 accounts for the 5%～15% of strip width。It is preferably 8%～10%。
In the embodiment above, described elastic plate refers to the elastic alloy sheet material with some strength。Such as 2Cr19Ni9Mo3J9,1Cr17Ni7 etc.。
Although by reference to some embodiments, invention has been described, it being understood, however, that without departing from the scope of the invention, it is possible to it is carried out various improvement or replacement。Especially, as long as the conflict being absent from structure, the feature in each embodiment all can be combined with each other, and the combination type feature formed still falls within the scope of the present invention。The invention is not limited in the specific embodiment disclosed in literary composition, but include all technical schemes falling in scope of the claims。
Claims (9)
1. one kind is used for reducing sleeve pipe anti-collapse in drilling process, it is characterized in that, including the sleeve body (1) curved by a monoblock elastic plate, the two ends of sleeve body (1) are built up overlapping section (2), and described overlapping section (2) is provided with and makes the sleeve body (1) can only toward the interface arrangment (3) of enlarged-diameter Direction distortion。
2. according to claim 1 for reducing sleeve pipe anti-collapse in drilling process, it is characterised in that described interface arrangment (3) includes the buckle (3.1) being located at sheet material one end and the draw-in groove (3.2) being located at the sheet material other end。
3. according to claim 2 for reducing sleeve pipe anti-collapse in drilling process, it is characterized in that, described draw-in groove (3.2) includes the inclined plane (3.2.1) for buckle (3.1) movement and the locking surface (3.2.2) of restriction buckle (3.1) movement。
4. according to claim 3 for reducing sleeve pipe anti-collapse in drilling process, it is characterised in that the inclined angle alpha of described inclined plane (3.2.1) is 10 °～45 °。
5. according to claim 4 for reducing sleeve pipe anti-collapse in drilling process, it is characterized in that, being provided with several described draw-in grooves (3.2), wherein the inclination angle of the inclined plane (3.2.1) of each described draw-in groove (3.2) reduces along the enlarged-diameter direction of sleeve body (1)。
6. according to claim 5 for reducing sleeve pipe anti-collapse in drilling process, it is characterized in that, described buckle (3.1) has two, and two buckles (3.1) are located at same one end of sheet material and lay respectively at the initial of described overlapping section (2) and end。
7. according to claim 1 for reducing sleeve pipe anti-collapse in drilling process, it is characterized in that, described interface arrangment (3) includes the first sawtooth (3.3) being arranged on sheet material one end and the second sawtooth (3.4) coordinated with the first sawtooth (3.3) being arranged on the sheet material other end。
8. according to claim 7 for reducing sleeve pipe anti-collapse in drilling process, it is characterised in that described first sawtooth (3.3) and the second sawtooth (3.4) are asymmetric sawtooth。
9. in any of the one of claim 1～8 for reducing sleeve pipe anti-collapse in drilling process, it is characterised in that the length of described overlapping section (2) accounts for the 5%～15% of strip width。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110149.0A CN104088587B (en) | 2013-04-01 | 2013-04-01 | For reducing sleeve pipe anti-collapse in drilling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110149.0A CN104088587B (en) | 2013-04-01 | 2013-04-01 | For reducing sleeve pipe anti-collapse in drilling process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104088587A CN104088587A (en) | 2014-10-08 |
| CN104088587B true CN104088587B (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310110149.0A Active CN104088587B (en) | 2013-04-01 | 2013-04-01 | For reducing sleeve pipe anti-collapse in drilling process |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112832708B (en) * | 2020-12-31 | 2023-08-29 | 湘潭大学 | Hook type packer for annular pipeline |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5586601A (en) * | 1995-04-28 | 1996-12-24 | Camco International Inc. | Mechanism for anchoring well tool |
| CN101194083A (en) * | 2005-05-02 | 2008-06-04 | 哈利伯顿能源服务公司 | Annular packer device |
| CN101709632A (en) * | 2009-11-17 | 2010-05-19 | 中国石油集团长城钻探工程有限公司 | Rotary reducing expansion device |
| CN101910555A (en) * | 2007-12-10 | 2010-12-08 | 艾尼股份公司 | Casing expanding tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7469750B2 (en) * | 2004-09-20 | 2008-12-30 | Owen Oil Tools Lp | Expandable seal |
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2013
- 2013-04-01 CN CN201310110149.0A patent/CN104088587B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5586601A (en) * | 1995-04-28 | 1996-12-24 | Camco International Inc. | Mechanism for anchoring well tool |
| CN101194083A (en) * | 2005-05-02 | 2008-06-04 | 哈利伯顿能源服务公司 | Annular packer device |
| CN101910555A (en) * | 2007-12-10 | 2010-12-08 | 艾尼股份公司 | Casing expanding tool |
| CN101709632A (en) * | 2009-11-17 | 2010-05-19 | 中国石油集团长城钻探工程有限公司 | Rotary reducing expansion device |
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| CN104088587A (en) | 2014-10-08 |
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