CN104747112A - Method for fishing fishes buried by silt and fishing spear of method - Google Patents
Method for fishing fishes buried by silt and fishing spear of method Download PDFInfo
- Publication number
- CN104747112A CN104747112A CN201310749066.6A CN201310749066A CN104747112A CN 104747112 A CN104747112 A CN 104747112A CN 201310749066 A CN201310749066 A CN 201310749066A CN 104747112 A CN104747112 A CN 104747112A
- Authority
- CN
- China
- Prior art keywords
- fish
- axle
- fishing
- slips
- leading cone
- 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
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
- E21B31/03—Freeing by flushing
-
- 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
- E21B31/002—Destroying the objects to be fished, e.g. by explosive means
-
- 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
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/16—Grappling tools, e.g. tongs or grabs combined with cutting or destroying means
-
- 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
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
Abstract
The invention discloses a method for fishing fishes buried by silt and a fishing spear of the method. High-pressure water is injected into a well by a drilling rod and is sprayed out by a nozzle of a guide cone to wash the silt on the fishes; the sprayed high-pressure water and the silt are sprayed out of the well from the gap between the drilling rod and a well wall; the silt is washed and the drilling rod drives a mandrel to slowly fall off and then is inserted into a fish inner hole remained in a well bottom; then the drilling rod drives the mandrel to rotate and be slowly lifted up; a slip on the mandrel is expanded outwards by a tapered surface saw tooth thread on the mandrel so as to clamp the fishes; then the drilling rod is ascended, the fishes are fished out from the well. According to the method, the damages that the fishes are buried by the silt and cannot be fished can be effectively solved, and the fishing success rate of the LM-T type slip fishing spear is greatly improved; in the fishing process, the well bottom can effectively keep clean, the rejection rate in exploiting and prospecting processes of an oil well and a gas well; the exploiting and prospecting cost is reduced.
Description
Technical field
the present invention relates to fish is buried in a kind of salvaging method and fishing spear thereof by silt, belong to probing fishing operation field.
Background technology
often there will be broken tool accident when oil gas field brill, well workover, often need, with Special fishing tool, the tubing string (being commonly called as fish) falling into shaft bottom is salvaged well head.LM-T type slips fishing spear is the one in fishing tool, and its operating principle utilizes the elasticity of slips (contractility) to stretch into fish endoporus stuck fast, then carry out lift fishing.Existing slips fishing spear can only complete clamping and on carry fishing, can not shaft bottom mud circulation be carried out.For the accident well that some stall for time longer, the precipitation of shaft bottom mud and rock sand can bury fish, greatly can increase lift load when salvaging, have a strong impact on fish fishing success ratio.
Summary of the invention
the object of the invention is to, a kind of salvaging is provided to be buried method and the fishing spear thereof of fish by silt, the present invention enables LM-T type slips fishing spear circulate to its inside and outside annular space mud when salvaging fish, rinsing and guaranteeing that fish is in best salvaging state by increasing sealing device, improve fishing success ratio, save and salvage cost, thus overcome the deficiencies in the prior art.
technical scheme of the present invention:
a kind of salvaging of the present invention by the method that silt buries fish is, the method in well, injects water under high pressure by drilling rod, the silt covered on fish, by the spout ejection on leading cone, washes out by water under high pressure, and the water under high pressure of ejection is discharged aboveground with silt from the gap between drilling rod and the borehole wall; While scouring sediment, drilling rod slowly falls with axle, and insertion is broken at the fish endoporus in shaft bottom; Then drilling rod drive axle to rotate, on carry, by axle forces the slips in axle to expand outwardly by conical surface buttless thread to block fish, then drilling rod rises, and is come by fish from underground fishing.
in preceding method, described leading cone upper end is connected with sealing joint body, and sealing joint body is provided with seal; Closing fish endoporus by seal forces water under high pressure along fish outer wall to moving uphole, can only reduce resistance when fish rises.
in preceding method, described leading cone guides fishing tool to enter fish smoothly, leading cone is divided into standard leading cone and milling leading cone two kinds, standard leading cone is used for the fish of the smooth rule of oral area, milling leading cone is provided with grinding machine head, there is the fish of flange, overlap, distortion for oral area, fish oral area affected by grinding machine head flange that leading cone 7 enters, overlap, distortion clean out.
in preceding method, the conical surface buttless thread coordinated with the conical surface buttless thread in axle is provided with in described slips, conical surface buttless thread on slips is provided with group leader's groove, when axle rotate, on carry time, forced by the conical surface buttless thread in axle and produce elastic deformation bottom slips and expand outwardly, block fish; Be provided with release ring below slips, when needing to discharge fish after salvaging unsuccessful or success, promote downwards, reversely rotating axle, release ring forces slips reinstatement inwardly to shrink release fish.
a kind of fishing spear for said method of the present invention is that this fishing spear comprises the axle, sub type nut, sealing joint body and the leading cone that are threaded successively from top to bottom; Axle overcoat has slips and release ring; Sealing joint body is provided with seal.
in aforementioned fishing spear, described axle upper end is provided with the inside tapered thread be connected with drilling rod, is provided with conical surface buttless thread in the middle part of axle, and axle lower end is provided with the external screw thread be connected with seal assembly.
in aforementioned fishing spear, be provided with the conical surface sawtooth internal thread coordinated with the conical surface sawtooth external screw thread in axle 1 in described slips, conical surface sawtooth internal thread is provided with one group of notch.
in aforementioned fishing spear, described seal assembly comprises the sealing joint body and leading cone that are threaded successively from top to bottom, is provided with seal between sealing joint body and leading cone.
in aforementioned fishing spear, the guide surface of described leading cone is light face or cutting face, and cutting face is provided with skiving blade and carbide alloy milling rib.
compared with prior art, the present invention effectively can solve the harm that fish cannot be salvaged by mud landfill, greatly improves the fishing success ratio of LM-T type slips fishing spear; Salvage and effectively can maintain shaft bottom totally simultaneously, reduce scrappage when oil, gas well exploitation, exploration; Reduce exploitation, exploration cost.
Accompanying drawing explanation
fig. 1 is operating diagram of the present invention;
fig. 2 is structural representation of the present invention;
fig. 3 is the structural representation of axle;
fig. 4 is the structural representation of slips.
being labeled as in accompanying drawing: 1-axle, 2-slips, 3-discharges ring, 4-sub type nut, 5-sealing joint body, 6-seal, 7-leading cone, 8-inside tapered thread, 9-conical surface sawtooth external screw thread, 10-external screw thread, 11-conical surface sawtooth internal thread, 12-notch, 13-skiving blade, 14-carbide alloy milling rib, the 15-borehole wall, 16-fish.
Detailed description of the invention
below in conjunction with accompanying drawing, the present invention is described in further detail, but not as any limitation of the invention.
the method of fish is buried in a kind of salvaging by silt, as shown in Figure 1, the method in well, injects water under high pressure by drilling rod, and water under high pressure is by the spout ejection on leading cone, washed out by the silt covered on fish, the water under high pressure of ejection discharges well head with silt from the gap between drilling rod and the borehole wall; While scouring sediment, drilling rod slowly falls with axle, and insertion is broken at the fish endoporus in shaft bottom; Then drilling rod drive axle to rotate, on carry, by axle forces the slips in axle to expand outwardly by conical surface buttless thread to block fish, then drilling rod rises, and is come by fish from underground fishing.Leading cone upper end is connected with sealing joint body, and sealing joint body is provided with seal; Closing fish endoporus by seal forces water under high pressure along fish outer wall to moving uphole, can only reduce resistance when fish rises.Leading cone guides fishing tool to enter fish smoothly, leading cone is divided into standard leading cone and milling leading cone two kinds, standard leading cone is used for the fish of the smooth rule of oral area, milling leading cone is provided with grinding machine head, there is the fish of flange, overlap, distortion for oral area, fish oral area affected by grinding machine head flange that leading cone 7 enters, overlap, distortion clean out.The conical surface buttless thread coordinated with the conical surface buttless thread in axle is provided with in slips, conical surface buttless thread on slips is provided with group leader's groove, when axle rotates, forced by the conical surface buttless thread in axle and produce elastic deformation bottom slips and expand outwardly, block fish; Be provided with release ring below slips, when needing to discharge fish after salvaging unsuccessful or success, promote downwards, reversely rotating axle, release ring forces slips reinstatement inwardly to shrink release fish.
for of the present invention a kind of fishing spear of said method structural representation as shown in Figure 2 to 4, this fishing spear comprises the axle 1, sub type nut 4, sealing joint body 5 and the leading cone 7 that are threaded successively from top to bottom; Axle 1 overcoat has slips 2 and release ring 3; Sealing joint body 5 is provided with seal 6.As shown in Figure 3, axle 1 upper end is provided with the inside tapered thread 8 be connected with drilling rod, is provided with conical surface buttless thread 9 in the middle part of axle 1, and axle 1 lower end is provided with the external screw thread 10 be connected with seal assembly.As shown in Figure 4, be provided with the conical surface sawtooth internal thread 11 coordinated with the conical surface sawtooth external screw thread 9 in axle 1 in slips 2, conical surface sawtooth internal thread 11 is provided with one group of notch 12.Seal assembly comprises the sealing joint body 5 and leading cone 7 that are threaded successively from top to bottom, is provided with seal 6 between sealing joint body 5 and leading cone 7.The guide surface of leading cone 7 is light face or cutting face, and cutting face is provided with skiving blade 13 and carbide alloy milling rib 14.
in the present invention, the usage and function of each main parts size is as follows: axle 1 is connected with top drilling tool by joint screw thread, and conical surface sawtooth internal thread 11 coordinates with slips 2 fish 16 of holding.Slips 2 is salvaged by coordinating with the conical surface sawtooth internal thread 11 of axle 1 and stings tight or fish 16 of holding.The effect of release ring 3 release fish after salvaging unsuccessful or success.Sub type nut 4: for connecting lower seal assembly and lance assembly is dragged on top.Seal assembly comprises axle 1, slips and release ring 3; Drag for lance assembly and comprise sealing joint body 5, seal 6 and leading cone 7.Sealing joint body 5 plays the effect of connection and fitting tight body 6.Seal 6 is rubber parts, and with shaft bottom fish 16 inwall interference fit, Main Function seals in circulation, flushing process.Leading cone 7 guides this fishing spear of the present invention can enter fish 16 endoporus smoothly.Leading cone 7 is divided into according to fish situation difference: standard leading cone and milling leading cone two kinds, and standard leading cone, for salvaging smooth, the regular fish of oral area, guides fishing tool can enter fish smoothly.Milling leading cone is for salvaging the fish of the situations such as oral area flange, overlap, distortion.Fishing tool is guided to enter fish smoothly after first carrying out milling with this leading cone.Its milling position is divided into skiving blade 13 and carbide alloy milling rib 14.
the course of work of the present invention and principle
as shown in Figure 1, the present invention is mainly used for improvement or the upgrading of LM-T type slips fishing spear) its structure is as shown in Figure 2.The axle 1 on slips fishing spear top is connected with drilling tool or drilling rod, and leading cone 7 guiding tool of slips fishing spear bottom enters fish 16 endoporus.
working method: the fit clearance of the conical surface sawtooth external screw thread 9 in the conical surface sawtooth internal thread 11 of slips 2 inside of fishing spear and axle 1 is comparatively large, and slips so just can be made to have certain stroke to swell and to reduce in axle.After slips is inserted into fish endoporus, as long as apply an axial compression, slips is up along axle.Enter fish because axial tension makes slips shrink, now slips is up and reduce.When on carry drilling rod, slips relatively moves downward in axle.Because the externally threaded longitudinal section of conical surface sawtooth is tapered slope, slips is inevitable with the conelet end motion of heavy fish to cone, and now fish weight kilocalorie of healing obtains also tighter.Whole weight passes to axle by slips.As required, if after fish is stuck, require first turn on pump cyclic flusher fish, just must install in advance seal assembly go into the well circulation, rinse, to be recycled, rinsed rear on carry fish up.
Claims (9)
1. salvage the method for being buried fish by silt for one kind, it is characterized in that: the method in well, injects water under high pressure by drilling rod, water under high pressure is by the spout ejection on leading cone, washed out by the silt covered on fish, the water under high pressure of ejection discharges well head with silt from the gap between drilling rod and the borehole wall; While scouring sediment, drilling rod slowly falls with axle, and insertion is broken at the fish endoporus in shaft bottom; Then drilling rod drive axle rotate, on carry, force the slips in axle to expand outwardly by the conical surface buttless thread in axle and block fish, then drilling rod rise, by fish from underground fishing come.
2. method according to claim 1, is characterized in that: described leading cone upper end is connected with sealing joint body, and sealing joint body is provided with seal; Closing fish endoporus by seal forces water under high pressure along fish outer wall to moving uphole, can only reduce resistance when fish rises.
3. method according to claim 2, it is characterized in that: described leading cone guides fishing tool to enter fish smoothly, leading cone is divided into standard leading cone and milling leading cone two kinds, standard leading cone is used for the fish of the smooth rule of oral area, milling leading cone is provided with grinding machine head, there is the fish of flange, overlap, distortion for oral area, fish oral area affected by grinding machine head flange that leading cone 7 enters, overlap, distortion clean out.
4. method according to claim 3, it is characterized in that: in described slips, be provided with the conical surface buttless thread coordinated with the conical surface buttless thread in axle, conical surface buttless thread on slips is provided with group leader's groove, when axle rotate, slowly on carry time, forced by the conical surface buttless thread in axle and produce elastic deformation bottom slips and expand outwardly, block fish; Be provided with release ring below slips, when needing release fish after salvaging unsuccessful or success, to pressing down, reversely rotating promotion axle, release ring forces slips reinstatement inwardly to shrink release fish.
5. for a fishing spear for the arbitrary described method of claim 1-4, it is characterized in that: comprise the axle (1), sub type nut (4), sealing joint body (5) and the leading cone (7) that are threaded successively from top to bottom; Axle (1) overcoat has slips (2) and release ring (3); Sealing joint body (5) is provided with seal (6).
6. fishing spear according to claim 5, it is characterized in that: described axle (1) upper end is provided with the inside tapered thread (8) be connected with drilling rod, axle (1) middle part is provided with conical surface sawtooth external screw thread (9), and axle (1) lower end is provided with the external screw thread (10) be connected with seal assembly.
7. fishing spear according to claim 5, is characterized in that: be provided with the conical surface sawtooth internal thread (11) coordinated with the conical surface sawtooth external screw thread (9) in axle 1 in described slips (2), conical surface sawtooth internal thread (11) is provided with one group of notch (12).
8. fishing spear according to claim 6, is characterized in that: described seal assembly comprises the sealing joint body (5) and leading cone (7) that are threaded successively from top to bottom, is provided with seal (6) between sealing joint body (5) and leading cone (7).
9. fishing spear according to claim 6, it is characterized in that: the guide surface of described leading cone (7) is light face or cutting face, cutting face is provided with skiving blade (13) and carbide alloy milling rib (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749066.6A CN104747112A (en) | 2013-12-31 | 2013-12-31 | Method for fishing fishes buried by silt and fishing spear of method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749066.6A CN104747112A (en) | 2013-12-31 | 2013-12-31 | Method for fishing fishes buried by silt and fishing spear of method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104747112A true CN104747112A (en) | 2015-07-01 |
Family
ID=53587291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310749066.6A Pending CN104747112A (en) | 2013-12-31 | 2013-12-31 | Method for fishing fishes buried by silt and fishing spear of method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747112A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368640A (en) * | 2016-10-28 | 2017-02-01 | 中国石油集团渤海钻探工程有限公司 | Process method for salvaging irregular falling object in oil pipe and solving tubular column sand jam by adopting coiled tubing |
| CN106703725A (en) * | 2015-11-17 | 2017-05-24 | 贵州高峰石油机械股份有限公司 | Rotary sandblasting head |
| CN107435526A (en) * | 2017-08-07 | 2017-12-05 | 贵州高峰石油机械股份有限公司 | A kind of a wide range of fishing spear and its Refloatation method |
| CN108019176A (en) * | 2016-11-02 | 2018-05-11 | 德州隆科石油装备有限公司 | A kind of cementing device fisher |
| CN109798082A (en) * | 2018-10-16 | 2019-05-24 | 中国石油天然气股份有限公司 | Fishing tool |
| CN108019176B (en) * | 2016-11-02 | 2024-04-26 | 德州隆科石油装备有限公司 | Cement injection device fisher |
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|---|---|---|---|---|
| RU2266387C1 (en) * | 2004-06-15 | 2005-12-20 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Borehole casing spear |
| CN201908601U (en) * | 2010-12-17 | 2011-07-27 | 中国石油天然气股份有限公司 | Sealing left hand fishing spear |
| CN202284458U (en) * | 2011-11-11 | 2012-06-27 | 通化市远通石油机械有限责任公司 | Sealed backoff fishing spear |
| CN202937216U (en) * | 2012-12-07 | 2013-05-15 | 中国石油集团渤海钻探工程有限公司 | Outer hook type spear capable of fishing in receding mode |
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2013
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Patent Citations (4)
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| RU2266387C1 (en) * | 2004-06-15 | 2005-12-20 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Borehole casing spear |
| CN201908601U (en) * | 2010-12-17 | 2011-07-27 | 中国石油天然气股份有限公司 | Sealing left hand fishing spear |
| CN202284458U (en) * | 2011-11-11 | 2012-06-27 | 通化市远通石油机械有限责任公司 | Sealed backoff fishing spear |
| CN202937216U (en) * | 2012-12-07 | 2013-05-15 | 中国石油集团渤海钻探工程有限公司 | Outer hook type spear capable of fishing in receding mode |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703725A (en) * | 2015-11-17 | 2017-05-24 | 贵州高峰石油机械股份有限公司 | Rotary sandblasting head |
| CN106368640A (en) * | 2016-10-28 | 2017-02-01 | 中国石油集团渤海钻探工程有限公司 | Process method for salvaging irregular falling object in oil pipe and solving tubular column sand jam by adopting coiled tubing |
| CN106368640B (en) * | 2016-10-28 | 2018-11-20 | 中国石油集团渤海钻探工程有限公司 | Using the process of junk and solution tubing string sand card special-shaped in coiled tubing fishing oil pipe |
| CN108019176A (en) * | 2016-11-02 | 2018-05-11 | 德州隆科石油装备有限公司 | A kind of cementing device fisher |
| CN108019176B (en) * | 2016-11-02 | 2024-04-26 | 德州隆科石油装备有限公司 | Cement injection device fisher |
| CN107435526A (en) * | 2017-08-07 | 2017-12-05 | 贵州高峰石油机械股份有限公司 | A kind of a wide range of fishing spear and its Refloatation method |
| CN109798082A (en) * | 2018-10-16 | 2019-05-24 | 中国石油天然气股份有限公司 | Fishing tool |
| CN109798082B (en) * | 2018-10-16 | 2023-10-27 | 中国石油天然气股份有限公司 | Fishing tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150701 |
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| RJ01 | Rejection of invention patent application after publication |