CN111997555A - Fishing tool for objects falling from well bottom and fishing method thereof - Google Patents
Fishing tool for objects falling from well bottom and fishing method thereof Download PDFInfo
- Publication number
- CN111997555A CN111997555A CN202010969704.5A CN202010969704A CN111997555A CN 111997555 A CN111997555 A CN 111997555A CN 202010969704 A CN202010969704 A CN 202010969704A CN 111997555 A CN111997555 A CN 111997555A
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- Prior art keywords
- fishing
- falling
- steel bar
- fisher
- tool
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000005389 magnetism Effects 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 9
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses a fisher for objects falling from a well bottom, which comprises a fishing body, wherein strong magnets distributed in an array manner are arranged on the inner wall of the fishing body, a steel bar rod is arranged at the bottom of the fishing body and is arc-shaped, the fishing body is also provided with hard alloy drill teeth distributed in an axial array manner, and a sleeve joint is arranged on the fishing body; a fishing method for a fishing tool for fallen objects in a shaft bottom is characterized in that a fishing body is arranged below a hole bottom, the position of the fallen objects is confirmed, the fishing body is manually rotated after a pump is sent, so that the top end of the fallen objects can enter the fishing body without rotation, a drilling tool is vertically arranged below the fishing tool, secondary accidents are prevented, and after the fallen objects are integrally determined to enter a fishing barrel, the fallen objects are slowly lifted out of the shaft bottom, a drill is lifted to check whether falling logging instruments and tools are taken out of the fishing barrel, and the falling logging instruments and tools are not fished in the first step to the third step until the falling logging instruments and tools are fished. The invention salvages the dropped objects, so that the dropped objects enter the salvage barrel and are adsorbed on the pipe wall by strong magnetism and are taken out of a well hole, thereby avoiding the influence on the drilling period.
Description
Technical Field
The invention relates to the field of exploration drilling, in particular to a fisher for junk at the bottom of a well and a fishing method thereof.
Background
The bore diameter of a large-bore hole is large, the drilling safety risk is high, in the drilling process, more equipment, parts, auxiliary equipment and tools are needed, in addition, the tool use frequency is high in the scaling process, the sizes are different, drilling fluid is easy to adhere to a re-drilling platform, workers' clothes and gloves are easy to cause that orifice objects fall into the hole, and hole accidents are caused, in addition, in the drilling process, if severe weather is met, the risk of orifice falling objects is easy to cause, basically, all wells can determine a coal bed or mark layer positions only through logging in the drilling process, in the logging process, instruments fall off due to logging ropes or other reasons in the hole, some accidents are caused, care is taken, the accident occurrence rate can be reduced, and the accidents cannot be eradicated, and aiming at the situation, a fisher and a fishing method for the well bottom falling objects are provided, so that the accidents of the falling objects in the hole can be rapidly solved, to help the drilling process proceed smoothly.
Disclosure of Invention
The invention aims to provide a fisher for objects falling from a well bottom and a fishing method thereof.
The purpose of the invention can be realized by the following technical scheme:
a salvager for objects falling from a well bottom comprises a salvage body, wherein strong magnets distributed in an array mode are arranged on the inner wall of the salvage body, a steel bar rod is arranged at the bottom of the salvage body and is arc-shaped, hard alloy drill teeth distributed in an axial array mode are further arranged on the salvage body, and a sleeve joint is arranged on the salvage body;
furthermore, the strong magnetism at the uppermost end is not higher than the highest position of the edge of the fishing body, and the length of the reinforcing bar does not exceed one fourth of the perimeter of the fishing body.
Furthermore, the reinforcing steel bar is welded at the bottom of the fishing body, the welding length is longer than ten centimeters, the non-welded part of the reinforcing steel bar has the same radian with the fishing body, the diameter of the reinforcing steel bar is smaller than 1.5cm, and the vertical projection length of the non-welded part of the reinforcing steel bar is smaller than one fourth of the diameter of the sleeve.
Furthermore, the welding part of the reinforcing steel bar is perpendicular to the transverse diameter of the fishing body, and the welding part of the reinforcing steel bar starts to be 10-20 cm above the bottom of the fishing body.
A fishing method of a fishing tool for downhole fallen objects comprises the following steps:
the method comprises the following steps: lowering the salvaging body to the bottom of the approaching hole, and confirming the position of the falling object;
step two: after the pump is sent, the fishing body is manually rotated to ensure that the top end of the falling object enters the interior of the fishing body;
step three: the drilling tool is vertical to the lower drilling tool without rotating, secondary accidents are prevented, and the whole falling object is slowly lifted away from the well bottom after entering the fishing barrel;
step four: and (4) carrying out a drill lifting check to check whether the falling logging instrument and tool are brought out of the fishing barrel, and not fishing and circulating the steps from the first step to the third step until the falling logging instrument and tool are fished.
The invention has the beneficial effects that:
1. according to the invention, the fishing barrel is driven by the drilling tool to fall to the vicinity of the falling object, the falling object is ensured to enter the fishing barrel after slowly rotating, the falling object is fished, the falling object enters the fishing barrel and is adsorbed on the pipe wall by strong magnetism, and the falling object is taken out of a well hole, so that the influence on the drilling period is avoided, and the working efficiency is improved;
2. the invention has simple structure, convenient operation of operators and high fishing efficiency.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a partial structural cross-sectional view of a downhole junk overshot of the present invention;
FIG. 2 is a schematic process diagram of the method of fishing the downhole junk fisher of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
A fisher for objects dropped from a well bottom comprises a fishing body 1, as shown in figure 1, the inner wall of the fishing body 1 is provided with strong magnets 2 distributed in an array manner, the bottom of the fishing body 1 is provided with a steel bar rod 3, the steel bar rod 3 is arc-shaped, the fishing body 1 is also provided with hard alloy drill teeth 4 distributed in an axial array manner, the fishing body 1 is provided with a casing joint 5, the strong magnet 3 at the uppermost end is not higher than the highest position of the edge of the fishing body 1, the length of the steel bar rod 3 is not more than one fourth of the circumference of the fishing body 1, the steel bar rod 3 is welded at the bottom of the fishing body 1, the welding length is more than ten centimeters, the steel bar rod 3 at the non-welded part has the same radian as, and the vertical projection length of the part of the reinforcing steel bar 3 which is not welded is less than one fourth of the diameter of the casing, the welding part of the reinforcing steel bar 3 is vertical to the transverse diameter of the fishing body 1, and the welding part of the reinforcing steel bar 3 starts from 10-20 cm above the bottom of the fishing body 1.
A method for fishing a downhole junk fisher, as shown in fig. 2, comprising the following steps:
the method comprises the following steps: lowering the salvaging body 1 to the bottom of the approaching hole, and confirming the position of the falling object;
step two: after the pump is sent, the fishing body 1 is manually rotated to ensure that the top end of the fallen object enters the interior of the fishing body 1;
step three: the drilling tool is vertical to the lower drilling tool without rotating, secondary accidents are prevented, and the whole falling object is slowly lifted away from the well bottom after entering the fishing barrel;
step four: and (4) carrying out a drill lifting check to check whether the falling logging instrument and tool are brought out of the fishing barrel, and not fishing and circulating the steps from the first step to the third step until the falling logging instrument and tool are fished.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (5)
1. The utility model provides a thing fisher that drops in shaft bottom, includes salvage body (1), its characterized in that, salvage body (1) inner wall and be equipped with strong magnetism (2) that the array distributes, salvage body (1) bottom is equipped with reinforcing bar rod (3), and reinforcing bar rod (3) are the arc, salvage body (1) and still be equipped with carbide drill tooth (4) that axial array distributes, salvage and be equipped with casing joint (5) on body (1).
2. A downhole junk fisher according to claim 1, wherein the uppermost strong magnet (3) is not higher than the highest edge of the fisher body (1), and the length of the steel bar (3) is not more than one quarter of the circumference of the fisher body (1).
3. A downhole junk fisher according to claim 1, wherein the steel bar (3) is welded at the bottom of the fisher body (1), the welding length is more than ten centimeters, the non-welded part of the steel bar (3) has the same arc as the fisher body (1), the diameter of the steel bar (3) is less than 1.5cm, and the vertical projection length of the non-welded part of the steel bar (3) is less than one fourth of the diameter of the casing.
4. A downhole junk fisher according to claim 1, wherein the welded part of the steel bar (3) is perpendicular to the transverse diameter of the fishing body (1), and the welded part of the steel bar (3) starts 10-20 cm above the bottom of the fishing body (1).
5. A fishing method of a fishing tool for dropped objects at the bottom of a well is characterized by comprising the following steps:
the method comprises the following steps: the fishing body (1) is lowered to be close to the bottom of the hole, and the position of a falling object is confirmed;
step two: after the pump is sent, the fishing body (1) is manually rotated to ensure that the top end of the falling object enters the fishing body (1);
step three: the drilling tool is vertical to the lower drilling tool without rotating, secondary accidents are prevented, and the whole falling object is slowly lifted away from the well bottom after entering the fishing barrel;
step four: and (4) carrying out a drill lifting check to check whether the falling logging instrument and tool are brought out of the fishing barrel, and not fishing and circulating the steps from the first step to the third step until the falling logging instrument and tool are fished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010969704.5A CN111997555A (en) | 2020-09-15 | 2020-09-15 | Fishing tool for objects falling from well bottom and fishing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010969704.5A CN111997555A (en) | 2020-09-15 | 2020-09-15 | Fishing tool for objects falling from well bottom and fishing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111997555A true CN111997555A (en) | 2020-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010969704.5A Pending CN111997555A (en) | 2020-09-15 | 2020-09-15 | Fishing tool for objects falling from well bottom and fishing method thereof |
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| CN (1) | CN111997555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846985A (en) * | 2021-11-01 | 2021-12-28 | 中勘资源勘探科技股份有限公司 | Fishing barrel for objects falling from well bottom |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4944543A (en) * | 1988-03-25 | 1990-07-31 | The United States Of America As Represented By The Secretary Of The Army | Ice auger extractor for retrieving augers or similar devices from a bore hole |
| CN201297149Y (en) * | 2008-07-18 | 2009-08-26 | 中铁大桥局集团第四工程有限公司 | Bit extractor of drilled pile with gib head plate |
| CN201460785U (en) * | 2009-08-19 | 2010-05-12 | 天津立林钻头有限公司 | Bottom-hole fallen object fisher |
| CN107152255A (en) * | 2017-06-30 | 2017-09-12 | 四川达灿石油设备有限公司 | The pneumatic oil well of drawing and pulling type salvages structure |
| CN110219613A (en) * | 2019-05-05 | 2019-09-10 | 中铁第四勘察设计院集团有限公司 | Drilling tool fishing device and drilling tool Refloatation method |
| CN210509097U (en) * | 2019-09-02 | 2020-05-12 | 中国石油集团西部钻探工程有限公司 | Split type inner hook tooth overshot |
-
2020
- 2020-09-15 CN CN202010969704.5A patent/CN111997555A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4944543A (en) * | 1988-03-25 | 1990-07-31 | The United States Of America As Represented By The Secretary Of The Army | Ice auger extractor for retrieving augers or similar devices from a bore hole |
| CN201297149Y (en) * | 2008-07-18 | 2009-08-26 | 中铁大桥局集团第四工程有限公司 | Bit extractor of drilled pile with gib head plate |
| CN201460785U (en) * | 2009-08-19 | 2010-05-12 | 天津立林钻头有限公司 | Bottom-hole fallen object fisher |
| CN107152255A (en) * | 2017-06-30 | 2017-09-12 | 四川达灿石油设备有限公司 | The pneumatic oil well of drawing and pulling type salvages structure |
| CN110219613A (en) * | 2019-05-05 | 2019-09-10 | 中铁第四勘察设计院集团有限公司 | Drilling tool fishing device and drilling tool Refloatation method |
| CN210509097U (en) * | 2019-09-02 | 2020-05-12 | 中国石油集团西部钻探工程有限公司 | Split type inner hook tooth overshot |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846985A (en) * | 2021-11-01 | 2021-12-28 | 中勘资源勘探科技股份有限公司 | Fishing barrel for objects falling from well bottom |
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