CN105863542A - In-wellbore fishing tool for salt well blocking improvement - Google Patents
In-wellbore fishing tool for salt well blocking improvement Download PDFInfo
- Publication number
- CN105863542A CN105863542A CN201610293708.XA CN201610293708A CN105863542A CN 105863542 A CN105863542 A CN 105863542A CN 201610293708 A CN201610293708 A CN 201610293708A CN 105863542 A CN105863542 A CN 105863542A
- Authority
- CN
- China
- Prior art keywords
- well
- tool
- strong magnetic
- retaining wall
- fishing tool
- 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
- 150000003839 salts Chemical class 0.000 title claims abstract description 19
- 230000000903 blocking effect Effects 0.000 title abstract 4
- 230000009466 transformation Effects 0.000 claims description 15
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 7
- 230000001681 protective effect Effects 0.000 abstract 5
- 238000003801 milling Methods 0.000 description 10
- 238000005242 forging Methods 0.000 description 9
- 239000004568 cement Substances 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/06—Fishing for or freeing objects in boreholes or wells using magnetic means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
Abstract
The invention relates to the technical field of salt well blocking improvement, in particular to an in-wellbore fishing tool for salt well blocking improvement. The in-wellbore fishing tool comprises a cylindrical strong magnet and a hollow cylindrical protective wall which are matched with a wellbore, and the hollow cylindrical protective wall is connected to the lower end of the cylindrical strong magnet; a plurality of strong magnetic strips are fixed to the inner side of the hollow cylindrical protective wall, and the attraction force of the strong magnet is larger than that of the strong magnetic strips. By adopting the structure, the in-wellbore fishing tool for salt well blocking improvement attracts a tool falling into a well through the strong magnet and the strong magnetic strips arranged on the cylindrical protective wall to enable the tool to be capable of entering a strong magnetic cylinder in an upright state, and the protective wall can effectively prevent the condition that fishing fails because the tool falls into the well again in the lifting process due to the fact that the tool horizontally protrudes to be blocked by steps arranged at the wellhole enlargement position.
Description
Technical field
The present invention relates to salt well closure renovation technique field, salvage in particularly a kind of salt well closure transformation pit shaft
Instrument.
Background technology
The pit shaft having air-tightness to require carries out closure transformation, if select segmentation forging milling, only forging milling needs to forge milling
Part, remainder needs to protect its integrity and sealing as far as possible.During segmentation forging milling or reaming hole,
If forging milling cutter or reaming hole cutter fall well accidentally, shown in situation below figure 1a now and Fig. 1 b, cutter is long
Degree more than casing inner diameter, cutter can only oblique cutting in sleeve pipe.Owing to the well cutter that falls has alloy component, and and well
Connect without fixing between end cement surface, it is impossible to use the method commonly milled first to destroy and salvage again.If using general
Logical tubular claw fishing tool, needs during lower brill to pressurize shaft bottom so that lost tool can be grabbed, there is wind
If danger is to be not aligned with pressurization, can make well cutter the most stuck with casing wall, increase and salvage difficulty.
Chinese invention patent CN 105178902A discloses a kind of lifting type fishing tool, including outer cylinder body,
Inner barrel, lifting cylinder, lifting member, magnetic core and self-styled parts, content carries and being set in described outer cylinder body,
Annular channel is formed between outer cylinder body and inner barrel；Lifting cylinder is located in the inner chamber of inner barrel vertically, lifts
Having lifting chamber in rising cylinder, annular channel extends to lift bottom chamber and connects with lifting chamber, lifting member energy
Enough being arranged in axially slidably lifts in chamber；Can adsorb the magnetic core of trouble of lost tool in hole, magnetic core is connected with lifting member；
Self-styled parts are connected to below outer cylinder body, and can be drawn in by pressurized.Although, this invention is by arranging magnetic core
Adsorb the magnetic junk of down-hole, lift the down-hole of magnetic core and absorption by arranging lifting cylinder and lifting member
Junk, after magnetic core and trouble of lost tool in hole being lifted in the inner chamber in bucket, can press down fishing string to make self-styled parts
Draw in self-styled, fish for as adsorbed trouble of lost tool in hole, prevent the trouble of lost tool in hole secondary salvaged from dropping, when pressing down
Magnetic core will not be damaged；But, the structure of this invention is complex and high cost.
Summary of the invention
In the technical issues that need to address of the present invention provide a kind of efficient and easy salt well closure transformation pit shaft
Fishing tool.
For solving above-mentioned technical problem, fishing tool in the salt well closure transformation pit shaft of the present invention, including with
Tubular kicker magnet that pit shaft adapts and hollow barrel-type retaining wall, described hollow barrel-type retaining wall is connected to the strong magnetic of tubular
Body lower end；Being fixed with some strong magnetic stripes inside described hollow barrel-type retaining wall, the absorption affinity of described kicker magnet is more than
The absorption affinity of strong magnetic stripe.
Further, described strong magnetic stripe is evenly distributed along hollow barrel-type retaining wall inner circumferential.
After using said structure, in the salt well closure transformation pit shaft of the present invention, fishing tool is by kicker magnet and cylinder
Strong magnetic stripe on shape retaining wall attracts the well cutter that falls so that it is can uprightly enter strong magnetic cylinder, retaining wall can effectively prevent work
Tool is stopped and the well that again falls by the step at well expansion owing to accumbency is prominent in lifting process, causes salvaging
Failure.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 a is salt well of the present invention closure transformation forging milling process schematic.
Fig. 1 b is salt well of the present invention closure transformation reaming hole process schematic.
When Fig. 1 c is salt well of the present invention closure transformation, in pit shaft, process schematic salvaged by instrument.
Fig. 2 is the structural representation of fishing tool in salt well of the present invention closure transformation pit shaft.
Fig. 3 a is that the present invention only has kicker magnet to adsorb to fall the structural representation of well cutter situation one.
Fig. 3 b is that the present invention only has kicker magnet to adsorb to fall the structural representation of well cutter situation two.
Fig. 3 c be salt well of the present invention closure transformation pit shaft in fishing tool absorption fall well cutter structural representation.
In figure: 1 is pit shaft, 2 is forging groove milling, and 3 is cutter, and 4 is cement plug, and 5 is reaming hole groove, and 6 is upper
At reaming hole, 7 is at lower contracting eye, and 8 is kicker magnet, and 9 is retaining wall, and 10 is strong magnetic stripe
Detailed description of the invention
As illustrated in figs. ia and ib, during salt well closure transformation, the cement plug in pit shaft 1 is needed
Carry out above in the of 4 forging milling and reaming hole, on cutter 3 arrives at reaming hole 6 time open, cutter 3 big across length
Diameter d in pit shaft 1.First in pit shaft 1, carry out forging milling form forging groove milling 2, expand the most further
Eye-shaped becomes reaming hole groove 5, under so being formed between reaming hole groove 5 and cement plug 4 at contracting eye 7.
As illustrated in figure 1 c, when salvaging well cutter 3, when fall well cutter 3 through at lower contracting eye 7 time, by
Big in the space of reaming hole groove 5, the well cutter 3 that falls will extend and come, the well cutter 3 that so falls across length
More than the diameter d of 6 at upper reaming hole, thus can cause falling well cutter 3 to be blocked and the well that again falls, cause beating
Drag for unsuccessfully.
As in figure 2 it is shown, fishing tool in the salt well closure transformation pit shaft of the present invention, adapt including with pit shaft
Tubular kicker magnet 8 and hollow barrel-type retaining wall 9, so can be by tubular kicker magnet 8 and hollow barrel-type retaining wall 9
Entirety transfer to the Jing Daojuchu that falls along pit shaft.Described hollow barrel-type retaining wall 9 is connected to tubular kicker magnet 8
Lower end；Some strong magnetic stripes 10, the absorption affinity of described kicker magnet 8 it is fixed with inside described hollow barrel-type retaining wall 9
Absorption affinity summation more than strong magnetic stripe 10.So hollow barrel-type retaining wall 9 arrives well cutter 3 when,
The absorption affinity of kicker magnet 8 is relatively big, and the well cutter 3 that falls can be adsorbed straight up；Falling, well cutter 3 is being inhaled
Attached move up during, kicker magnet 10 can the well cutter 3 that fall is adsorbed on the inwall of tubular retaining wall 9,
Effective anti-falling stop well cutter 3 is stopped and the well that again falls by the step at well expansion owing to accumbency is prominent.As
Shown in Fig. 3 a, without when arranging tubular retaining wall 9, the well cutter 3 that falls meeting only one of which point is by kicker magnet 8
Absorption, so during promoting well cutter by kicker magnet 8, the well cutter 3 that falls meeting double swerve,
Can again fall in well during rocking.As shown in Figure 3 b, without when arranging tubular retaining wall 9,
The well cutter 3 that falls also can laterally overall be adsorbed by kicker magnet 8, but during rising, fall well cutter 3
Across length still can more than the diameter d of 6 at upper reaming hole, thus can cause falling well cutter 3 to be blocked and again
Secondary fall well, cause salvaging unsuccessfully.
Further, described strong magnetic stripe 10 is evenly distributed along hollow barrel-type retaining wall 9 inner circumferential, such as Fig. 3 c institute
Show, so can preferably the well cutter 3 that falls be adsorbed in tubular retaining wall 9.
The operation principle of the present invention is as follows: as shown in Figure 3 c, falls after well when there being cutter, it is necessary first to common
Claw instrument enter well, behind in-position, turning tool stuck with casing wall enters well cutter to stir so that it is
Can be successfully by strong magnetic attraction.Enter down kicker magnet 8 and the entirety of hollow barrel-type retaining wall 9, kicker magnet 8
The well cutter 3 that falls is attracted so that it is can uprightly enter strong magnetic cylinder, tubular retaining wall 9 with the strong magnetic stripe on tubular retaining wall 9
Can effectively prevent instrument in lifting process due to accumbency prominent the stop by the step at well expansion and again fall
Well, causes salvaging unsuccessfully.
Although the foregoing describing the detailed description of the invention of the present invention, but those skilled in the art should managing
Solving, these are merely illustrative of, and present embodiment can be made various changes or modifications, without departing from sending out
Bright principle and essence, protection scope of the present invention is only limited by the claims that follow.
Claims (2)
1. fishing tool in a salt well closure transformation pit shaft, it is characterised in that: include the cylinder adapted with pit shaft
Shape kicker magnet and hollow barrel-type retaining wall, described hollow barrel-type retaining wall is connected to tubular kicker magnet lower end；In described
Being fixed with some strong magnetic stripes inside empty tubular retaining wall, the absorption affinity of described kicker magnet is more than the absorption affinity of strong magnetic stripe.
2. according to fishing tool in the salt well closure transformation pit shaft described in claim 1, it is characterised in that: described
Strong magnetic stripe is evenly distributed along hollow barrel-type retaining wall inner circumferential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293708.XA CN105863542A (en) | 2016-05-05 | 2016-05-05 | In-wellbore fishing tool for salt well blocking improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293708.XA CN105863542A (en) | 2016-05-05 | 2016-05-05 | In-wellbore fishing tool for salt well blocking improvement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105863542A true CN105863542A (en) | 2016-08-17 |
Family
ID=56630306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610293708.XA Pending CN105863542A (en) | 2016-05-05 | 2016-05-05 | In-wellbore fishing tool for salt well blocking improvement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105863542A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459017A (en) * | 2018-05-21 | 2018-08-28 | 张军芬 | Test strip |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070102161A1 (en) * | 2005-09-09 | 2007-05-10 | Gazewood Michael J | Magnetic fishing tool and method |
| CN203822228U (en) * | 2014-03-07 | 2014-09-10 | 中国石油化工股份有限公司 | Strong magnetic composite bailer |
| CN204371183U (en) * | 2015-01-08 | 2015-06-03 | 安学龙 | A kind of down-hole load-engaging device |
| CN105178902A (en) * | 2015-08-05 | 2015-12-23 | 中国石油天然气股份有限公司 | Lifting type fishing tool |
| CN205714062U (en) * | 2016-05-05 | 2016-11-23 | 中盐金坛盐化有限责任公司 | Fishing tool in salt well closure transformation pit shaft |
-
2016
- 2016-05-05 CN CN201610293708.XA patent/CN105863542A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070102161A1 (en) * | 2005-09-09 | 2007-05-10 | Gazewood Michael J | Magnetic fishing tool and method |
| CN203822228U (en) * | 2014-03-07 | 2014-09-10 | 中国石油化工股份有限公司 | Strong magnetic composite bailer |
| CN204371183U (en) * | 2015-01-08 | 2015-06-03 | 安学龙 | A kind of down-hole load-engaging device |
| CN105178902A (en) * | 2015-08-05 | 2015-12-23 | 中国石油天然气股份有限公司 | Lifting type fishing tool |
| CN205714062U (en) * | 2016-05-05 | 2016-11-23 | 中盐金坛盐化有限责任公司 | Fishing tool in salt well closure transformation pit shaft |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459017A (en) * | 2018-05-21 | 2018-08-28 | 张军芬 | Test strip |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160817 |