CN103939049A - Shaft falling object preventing device - Google Patents
Shaft falling object preventing device Download PDFInfo
- Publication number
- CN103939049A CN103939049A CN201310025397.5A CN201310025397A CN103939049A CN 103939049 A CN103939049 A CN 103939049A CN 201310025397 A CN201310025397 A CN 201310025397A CN 103939049 A CN103939049 A CN 103939049A
- Authority
- CN
- China
- Prior art keywords
- pit shaft
- slips
- prevention device
- shaft
- group
- 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
Links
- 230000002265 prevention Effects 0.000 claims abstract description 24
- 210000002445 nipple Anatomy 0.000 claims description 29
- 230000003139 buffering effect Effects 0.000 claims description 15
- 238000012856 packing Methods 0.000 claims description 15
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 abstract 3
- 238000004873 anchoring Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010057071 Rectal tenesmus Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 208000012271 tenesmus Diseases 0.000 description 1
Landscapes
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a shaft falling object prevention device which is arranged in a casing in a shaft, and comprises: the releasing joint, the short pipe joint, the at least one group of sealing rubber cylinders and the slips are sequentially connected from top to bottom, during operation, the lowering tool is connected with the releasing joint, the lowering tool lowers the shaft anti-falling device to the underground, the at least one group of sealing rubber cylinders and the slips are all anchored with the casing pipe through pressing, and the releasing joint is separated from the short pipe joint. The invention provides a shaft falling object preventing device arranged in a shaft, which is firmly fixed with a sleeve by arranging a double structure of a slip and a sealing rubber cylinder and anchoring the slip and the sleeve, so that the shaft falling object preventing device can bear larger impact force, prevent an oil pipe and various downhole tools which fall off from the upper part from falling and smashing into a downhole horizontal section, avoid causing downhole accidents, and control the production operation cost.
Description
Technical field
The present invention relates to field of petroleum exploitation, particularly a kind of pit shaft Junk prevention device.
Background technology
Along with continually developing oil field; utilize horizontal well to come Efficient Development oil sheet to be widely used gradually; in the manufacturing process in oil field; often there will be oil pipe to break to fall and pit shaft in various downhole tools situation about coming off; the oil pipe coming off and various downhole tool fall to pounding in down-hole horizontal section; even can drop down onto artificial bottom of a well; certainly will cause down-hole accident; and the numerous and diverse difficulty of salvaging process to the oil pipe coming off and downhole tool; when delaying production process, increased again operating cost, the development effectiveness of horizontal well is greatly affected.
At present, the horizontal section length of horizontal well is generally 200 ~ 1000m, thereby prevents that part oil pipe and various downhole tool from falling into horizontal segment and causing the accident, and is the current major issue solving of needing.
Summary of the invention
In order to solve prior art oil pipe and various downhole tool, fall into the problem of horizontal segment, the embodiment of the present invention provides a kind of pit shaft Junk prevention device.Described technical scheme is as follows:
A kind of pit shaft Junk prevention device, be arranged in the sleeve pipe in described pit shaft, described pit shaft Junk prevention device comprises: back-off sub, source nipple, at least one group of cartridge and slips, described back-off sub, described source nipple, described at least one group of cartridge is connected from top to bottom in turn with described slips, during work, the instrument of transferring is connected with described back-off sub, the described instrument of transferring transfers described pit shaft Junk prevention device to down-hole, by suppressing, make described at least one group of cartridge, described slips all with described sleeve pipe grappling, and described back-off sub is separated with described source nipple.
Further, described slips is upper and lower bi-directional slip.
Particularly, as preferably, described pit shaft Junk prevention device also comprises buffering packing element, and described buffering packing element is arranged between described source nipple and described at least one group of cartridge, and described buffering packing element is for cushioning the active force from described source nipple.
Further, described buffering packing element at least arranges one group.
As preferably, described source nipple and described slips all adopt alloy steel material.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
The embodiment of the present invention provides a kind of pit shaft Junk prevention device to be arranged on pit shaft inside, by dual structure and the sleeve pipe grappling of slips and cartridge are set, the present invention and sleeve pipe are fixed together firmly, thereby make the present invention can bear larger impact force, and then stop oil pipe and the various downhole tool that top comes off to fall to pounding in down-hole horizontal section, avoid causing down-hole accident, the cost of production control operation, carries out the exploitation of horizontal well smoothly; In addition, the present invention is simple in structure, easy to operate, has good using value.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the pit shaft Junk prevention device that provides of the embodiment of the present invention.
Wherein: 1 back-off sub, 2 source nipples, 3 buffering packing elements, 4 cartridge, 5 slips.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
As shown in Figure 1, a kind of pit shaft Junk prevention device, be arranged in the sleeve pipe in described pit shaft, described pit shaft Junk prevention device comprises: back-off sub 1, source nipple 2, at least one group of cartridge 4 and slips 5, described back-off sub 1, described source nipple 2, described at least one group of cartridge 4 is connected from top to bottom in turn with described slips 5, during work, the instrument of transferring is connected with described back-off sub 1, the described instrument of transferring transfers described pit shaft Junk prevention device to down-hole, by suppressing, make described at least one group of cartridge 4, described slips 5 all with described sleeve pipe grappling, and described back-off sub 1 is separated with described source nipple 2.
Wherein, back-off sub 1 is prior art, is mainly used in and the instrument of transferring coordinates docking that the present invention is transferred smoothly to down-hole, and gives up smoothly and make the parts of back-off sub of the present invention below 1 be fixed on down-hole correct position, source nipple 2 is mainly used in bearing the huge impact of pit shaft junk, and docks with fishing tool the present invention is salvaged smoothly after having worked, during work, back-off sub 1 is docked with the instrument of transferring, the instrument of transferring is generally working tubing, the present invention is transferred and to down-hole, is applicable to position, by ground to pitching in the present invention and suppress, slips 5 is opened to be anchored on sleeve pipe, cartridge 4 pressurized distendings are anchored on sleeve pipe simultaneously, cartridge 4 also can be according to actual needs, arrange one group or many groups, supplemented the anchorage force between the present invention and sleeve pipe, grappling completes and locks, make the present invention firmly be fixed on inside pipe casing, continue to boost and make back-off sub 1 complete the action of giving up, be that back-off sub 1 is separated with source nipple 2, then back-off sub 1 trips out with working tubing, the parts of source nipple 2 and its underpart are stayed in well jointly, the junks such as the oil pipe in well fall to source nipple 2, by the present invention, tackled, , after having worked, transfer fishing tool and source nipple 2 docking, the present invention is salvaged.
The embodiment of the present invention provides a kind of pit shaft Junk prevention device to be arranged on pit shaft inside, by dual structure and the sleeve pipe grappling of slips 5 and cartridge 4 are set, the present invention and sleeve pipe are fixed together firmly, thereby make the present invention can bear larger impact force, cartridge 4 can avoid slips 5 to be buried by sand simultaneously, and then stop oil pipe and the various downhole tool that top comes off to fall to pounding in down-hole horizontal section, avoid causing down-hole accident, the cost of production control operation, carries out the exploitation of horizontal well smoothly; In addition, the present invention by the back-off sub of conveniently transferring 1, the convenient source nipple 2 of salvaging, facilitate the slips 5 of grappling and cartridge 4 to integrate, overall structure is simple, easy to operate, has good using value.
As shown in Figure 1, further, described slips 5 is upper and lower bi-directional slip 5.Bi-directional slip 5 can make more stable being anchored in sleeve pipe of the present invention, is conducive to the interception to junk.
As shown in Figure 1, particularly, as preferably, described pit shaft Junk prevention device also comprises buffering packing element 3, described buffering packing element 3 is arranged between described source nipple 2 and described at least one group of cartridge 4, and described buffering packing element 3 is for cushioning the active force from described source nipple 2.
Further, described buffering packing element 3 at least arranges one group.
As shown in Figure 1, as preferably, described source nipple 2 and described slips 5 all adopt alloy steel material.Source nipple 2 adopts superior alloy steel heat treatment, has improved collapse resistance, and slips 5 adopts alloy steel, and hardness is high, and resistance to resistance is good.
Wherein, during work, the present invention is anchored to the correct position in sleeve pipe, the junks such as the oil pipe in well fall on source nipple 2, the impact of junk makes source nipple 2 tenesmus the downward application of force, the effect of buffering packing element 3 is that source nipple 2 presses down and in process, plays the effect of shock absorbing power, thereby make the grappling between cartridge 4 and sleeve pipe, slips 5 and sleeve pipe be subject to the little impact of trying one's best, and then being anchored in sleeve pipe of making that the present invention can be more stable, be conducive to the interception to junk, buffering packing element 3 can according to actual needs, be set to one group or many groups.
Through overtesting, pit shaft without liquid level situation under, the present invention can sustain the impact force of the oil pipe distance of fall 500m generation of maximum 1000m length, through theory calculate oil pipe to moment of the present invention impact maximum reach 102t, the present invention is setting intact, there is no change in displacement, play good Junk prevention effect, thereby can effectively prevent that horizontal segment that the larger junk of pit shaft enters horizontal well from causing salvages difficulty, for the normal production of horizontal well provides technique guarantee, when increasing safety factor, control cost of production, there are good market prospects.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a pit shaft Junk prevention device, be arranged in the sleeve pipe in pit shaft, it is characterized in that, described pit shaft Junk prevention device comprises: back-off sub, source nipple, at least one group of cartridge and slips, described back-off sub, described source nipple, described at least one group of cartridge is connected from top to bottom in turn with described slips, during work, the instrument of transferring is connected with described back-off sub, the described instrument of transferring transfers described pit shaft Junk prevention device to down-hole, by suppressing, make described at least one group of cartridge, described slips all with described sleeve pipe grappling, and described back-off sub is separated with described source nipple.
2. pit shaft Junk prevention device according to claim 1, is characterized in that, described slips is upper and lower bi-directional slip.
3. pit shaft Junk prevention device according to claim 1 and 2, it is characterized in that, described pit shaft Junk prevention device also comprises buffering packing element, described buffering packing element is arranged between described source nipple and described at least one group of cartridge, and described buffering packing element is for cushioning the active force from described source nipple.
4. pit shaft Junk prevention device according to claim 3, is characterized in that, described buffering packing element at least arranges one group.
5. pit shaft Junk prevention device according to claim 4, is characterized in that, described source nipple and described slips all adopt alloy steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310025397.5A CN103939049A (en) | 2013-01-22 | 2013-01-22 | Shaft falling object preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310025397.5A CN103939049A (en) | 2013-01-22 | 2013-01-22 | Shaft falling object preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103939049A true CN103939049A (en) | 2014-07-23 |
Family
ID=51186895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310025397.5A Pending CN103939049A (en) | 2013-01-22 | 2013-01-22 | Shaft falling object preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103939049A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343556A (en) * | 2020-12-02 | 2021-02-09 | 中国海洋石油集团有限公司 | Offshore gas well coiled tubing flowing back tubular column |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU874968A1 (en) * | 1977-11-09 | 1981-10-23 | за вигепи )874968 {51 )М. Кл. Е 21 В 23/ОО | Device for preventing a fall of deep-well equipment onto hole bottom |
| CN2534360Y (en) * | 2002-03-02 | 2003-02-05 | 中国石化胜利油田有限公司东辛采油厂 | Downhole mechanical fishing spear |
| CN2809269Y (en) * | 2005-07-14 | 2006-08-23 | 郑文照 | Junk prevention device for oil well pump |
| CN201021606Y (en) * | 2007-02-07 | 2008-02-13 | 辽宁跨克石油装备有限公司 | A device for preventing from oil well drop and suspender impact |
| CN201460802U (en) * | 2009-08-11 | 2010-05-12 | 濮阳市东昊机械电子有限公司 | Insertion pipe packer |
| CN202325384U (en) * | 2011-12-01 | 2012-07-11 | 阜新市石油工具厂 | Horizontal well falling object protecting tool |
-
2013
- 2013-01-22 CN CN201310025397.5A patent/CN103939049A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU874968A1 (en) * | 1977-11-09 | 1981-10-23 | за вигепи )874968 {51 )М. Кл. Е 21 В 23/ОО | Device for preventing a fall of deep-well equipment onto hole bottom |
| CN2534360Y (en) * | 2002-03-02 | 2003-02-05 | 中国石化胜利油田有限公司东辛采油厂 | Downhole mechanical fishing spear |
| CN2809269Y (en) * | 2005-07-14 | 2006-08-23 | 郑文照 | Junk prevention device for oil well pump |
| CN201021606Y (en) * | 2007-02-07 | 2008-02-13 | 辽宁跨克石油装备有限公司 | A device for preventing from oil well drop and suspender impact |
| CN201460802U (en) * | 2009-08-11 | 2010-05-12 | 濮阳市东昊机械电子有限公司 | Insertion pipe packer |
| CN202325384U (en) * | 2011-12-01 | 2012-07-11 | 阜新市石油工具厂 | Horizontal well falling object protecting tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343556A (en) * | 2020-12-02 | 2021-02-09 | 中国海洋石油集团有限公司 | Offshore gas well coiled tubing flowing back tubular column |
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|---|---|---|---|
| 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 |
Application publication date: 20140723 |
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| RJ01 | Rejection of invention patent application after publication |