CN108952614A - A kind of ratchet type down-hole fishing device - Google Patents

A kind of ratchet type down-hole fishing device Download PDF

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Publication number
CN108952614A
CN108952614A CN201810866622.0A CN201810866622A CN108952614A CN 108952614 A CN108952614 A CN 108952614A CN 201810866622 A CN201810866622 A CN 201810866622A CN 108952614 A CN108952614 A CN 108952614A
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CN
China
Prior art keywords
slips
ratchet
fish
mandrel
fishing device
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Granted
Application number
CN201810866622.0A
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Chinese (zh)
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CN108952614B (en
Inventor
汤历平
王成涛
祝效华
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Southwest Petroleum University
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Southwest Petroleum University
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Priority to CN201810866622.0A priority Critical patent/CN108952614B/en
Publication of CN108952614A publication Critical patent/CN108952614A/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B31/00Fishing for or freeing objects in boreholes or wells
    • E21B31/12Grappling tools, e.g. tongs or grabs
    • E21B31/20Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears

Abstract

The invention discloses a kind of ratchet type down-hole fishing devices, mainly by ratchet mandrel, spring, baffle ring, slips, guide cone, pawl, torsional spring and pin shaft composition, it is characterized in that: ratchet mandrel is equipped with tapered shaft, ratchet and connection screw thread, ratchet is located on tapered shaft and has only circumferentially covered 180 ° along tapered shaft, spring pocket is outer mounted in ratchet mandrel and both ends are respectively acting on the bench floor of ratchet mandrel and the top surface of baffle ring, baffle ring is installed on ratchet mandrel for limited spring, slips is equipped with looping pit, back-off, cannelure, ratchet slot, conical cavity, pin hole and torsional spring hole, slips is divided into three parts by cannelure, slips is enabled to be compressed and strutted, slip sleeve is on ratchet mandrel and conical cavity and matching for ratchet mandrel are combined into clearance fit, guide cone is connected through a screw thread with ratchet mandrel, the upper end of guide cone is for limiting Determine the axial movement of slips, pawl is assemblied on slips by torsional spring and pin shaft.The present invention is a kind of reversible structure and avoidable fish is burst.

Description

A kind of ratchet type down-hole fishing device
Technical field
The present invention relates to a kind of fishing device, especially a kind of ratchet type down-hole fishing device belongs to petroleum works or machine Tool field of engineering technology.
Background technique
It is with the continuous development of China's economy, also increasing for petroleum resources usage amount, therefore petroleum resources are opened It is also increasing to adopt dynamics.And with the continuous development of petroleum drilling technology, the depth of drilling well also increasingly increases, the environment of underground Also more complicated, such as rock strength and hardness increases with the increase of well depth.In the case, drilling period lengthens, and bores The drill string weight that column is subjected to increases, and the torque acted on drill string also increases, and is easy to appear phenomena such as drill string is broken and sends out Raw downhole tool falls accident.Once downhole tool, which occurs, falls accident, must just carry out carrying out fishing to down-hole equipment. Because trouble of lost tool in hole is very big to the exploitation work harm in oil field, it is easy blocking oil reservoir, oil/gas well is also will cause when serious and scraps, Cause huge time and economic loss.
And carrying out tool used in fishing is fishing spear, the fishing spear of domestic mainstream at present is a kind of reversible slips Fishing spear cannot take out fish, then can exit fishing spear, prevent secondary down-hole accident if meeting card during salvaging Occur.But the fishing slip of many fishing spears and fish inner wall contact area are small, and radial tension force is concentrated, and are easy spalling fish, Salvaging effect is lost, and fishing slip is easy to fall off and falls into well, causes new accident.Therefore design it is a kind of it is easy to operate, Simple, the safe and reliable fishing tool of structure is significant.
Summary of the invention
It is an object of the invention in order to overcome above-mentioned difficult point, spy proposes a kind of ratchet type down-hole fishing device, for mentioning The drilling efficiency of high deep-well.
In order to achieve the above objectives, the present invention solve this technical problem the technical solution adopted is that:
A kind of ratchet type down-hole fishing device, mainly by ratchet mandrel, spring, baffle ring, slips, guide cone, pawl, torsional spring It is formed with pin shaft, it is characterised in that: the ratchet mandrel is multi-diameter shaft, is equipped with tapered shaft, ratchet and connection screw thread;The ratchet It is located on tapered shaft and has only circumferentially covered 180 ° along tapered shaft;Outside ratchet mandrel, the upper end acts on the spring pocket The bench floor of ratchet mandrel, lower end act on the top surface of baffle ring;The baffle ring is installed on ratchet mandrel for limited spring; The slips is equipped with looping pit, back-off, cannelure, ratchet slot, conical cavity, pin hole and torsional spring hole;The number of the looping pit and cannelure Amount is three, and being arranged circumferentially along slips;The quantity of the ratchet slot and pin hole is two, and circumferentially-spaced along slips 120 ° of arrangements;Slips is divided into three parts by the cannelure, and slips is enabled to be compressed and strutted;The slip sleeve is mounted in spine On tooth core axis, and conical cavity and matching for ratchet mandrel are combined into clearance fit;The guide cone and ratchet mandrel are connected by screw thread It connects, the upper end of guide cone is used to limit the axial movement of slips;The pawl is assemblied on slips by torsional spring and pin shaft;Into When row fishing, according to the specification of fishing device described in fish hydrophthalmia size selection, and the outer diameter of slips should be than fish hydrophthalmia Big 1~the 3mm of size;When operation, fishing device is slowly transferred, when fishing device enters fish hydrophthalmia, since slips size is big In fish hydrophthalmia size, slips is radially compressed, when the frictional force between slips and fish inner wall is greater than the elastic force of spring, slips Stopping moves down, and continues pressurization decentralization fishing device, ratchet mandrel is moved downward relative to slips at this time, and tapered shaft is by slips It struts, so that slips bites fish by back-off;When stopping transferring fishing device, pawl is caught in ratchet under the action of torsional spring It is interior, so that slips remains that softened state bites fish;It is upper mention fishing device after, fish is taken out;Card is met if salvaged, Fish can not be normally taken out, then ratchet mandrel is rotated 180 °, so that pawl is separated with ratchet, then above mentions fishing device, ratchet Mandrel is moved upwards relative to slips, and slips retraction decontrols fish, fishing device can be exited fish.
Compared with prior art, the present invention have the advantage, that (1) present invention uses ratch mechanism, when salvaging chance card, Only need 180 ° of rotary drill column can Safe withdrawing fishing spear, it is easy to operate, securely and reliably;(2) fishing slip of the present invention and fish Inner wall contact area is big, and the swelling mode matched using tapered shaft with conical cavity, effectively prevents the concentration of tension force, from And avoid fish by spalling.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of ratchet type down-hole fishing device of the present invention;
Fig. 2 is A in Fig. 1 to schematic diagram;
Fig. 3 is the partial enlargement diagram of the part I in Fig. 2;
Fig. 4 is the structural schematic diagram of ratchet mandrel in the invention patent;
Fig. 5 is the structural schematic diagram of slips in the invention patent;
Fig. 6 is the structural schematic diagram of pawl in the invention patent;
Fig. 7 is the structural schematic diagram of torsional spring in the invention patent;
Fig. 8 is another structural schematic diagram of torsional spring in the invention patent.
In figure: 1. ratchet mandrels, 1a. tapered shaft, 1b. ratchet, 1c. connection screw thread, 2. springs, 3. baffle rings, 4. slips, 4a. looping pit, 4b. back-off, 4c. cannelure, 4d. ratchet slot, 4e. conical cavity, 4f. pin hole, 4g. torsional spring hole, 5. guide cones, 6. spine Pawl, 7. torsional springs, 8. pin shafts.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
As shown in figs 1 to 6, a kind of ratchet type down-hole fishing device, mainly by ratchet mandrel 1, spring 2, baffle ring 3, slips 4, guide cone 5, pawl 6, torsional spring 7 and pin shaft 8 form, it is characterised in that: the ratchet mandrel 1 is multi-diameter shaft, is equipped with tapered shaft 1a, ratchet 1b and connection screw thread 1c;The ratchet 1b is located on tapered shaft 1a and only along tapered shaft 1a and has circumferentially covered 180 °;Institute It states spring 2 to be sleeved on outside ratchet mandrel 1, the upper end acts on the bench floor of ratchet mandrel 1, and lower end acts on the top of baffle ring 3 Face;The baffle ring 3 is installed on ratchet mandrel 1 for limited spring 2;The slips 4 is equipped with looping pit 4a, back-off 4b, cannelure 4c, ratchet slot 4d, conical cavity 4e, pin hole 4f and torsional spring hole 4g;The quantity of the looping pit 4a and cannelure 4c is three, and along card Watt 4 be arranged circumferentially;The quantity of the ratchet slot 4d and pin hole 4f is two, and arranges along 4 circumferentially-spaced 120 ° of slips; Slips 4 is divided into three parts by the cannelure 4c, and slips 4 is enabled to be compressed and strutted;The slips 4 is sleeved on ratchet barrel On axis 1, and conical cavity 4e and matching for ratchet mandrel 1 are combined into clearance fit;The guide cone 5 passes through screw thread with ratchet mandrel 1 Connection, the upper end of guide cone 5 are used to limit the axial movement of slips 4;The pawl 6 is assemblied in slips by torsional spring 7 and pin shaft 8 On 4;When carrying out fishing, according to the specification of fishing device described in fish hydrophthalmia size selection, and the outer diameter of slips 4 should compare Big 1~the 3mm of fish hydrophthalmia size;When operation, fishing device is slowly transferred, when fishing device enters fish hydrophthalmia, due to card Watt 4 sizes are greater than fish hydrophthalmia size, and slips 4 is radially compressed, when the frictional force between slips 4 and fish inner wall is greater than spring When elastic force, the stopping of slips 4 is moved down, and continues pressurization decentralization fishing device, ratchet mandrel 1 is transported downwards relative to slips 4 at this time Dynamic, tapered shaft 1a struts slips 4, so that slips 4 bites fish by being buckled to 4b;When stopping transferring fishing device, pawl 6 It is caught in ratchet 1b under the action of torsional spring 7, so that slips 4 remains that softened state bites fish;Fishing device is mentioned upper Afterwards, fish is taken out;If salvage meet card, can not normally take out fish, then by ratchet mandrel 1 rotate 180 ° so that pawl 6 with Ratchet 1b separation, then fishing device is above mentioned, ratchet mandrel 1 is moved upwards relative to slips 4, and slips 4 bounces back, and decontrols fish, i.e., Fishing device can be exited fish.
A kind of ratchet type down-hole fishing device as described in Fig. 1-Fig. 3, it is characterised in that since the outer diameter of slips 4 compares fish Hydrophthalmia size is bigger, and slips 4 radially can be opened or be shunk a little, therefore when by the fishing device lower going-into-well bottom, slips 4 Fish can be bitten;Axial pressure on this basis, slips 4 is static with respect to fish and ratchet mandrel 1 is moved downward with respect to fish, right Spring 2 is answered to be compressed;Since ratchet mandrel 1 is equipped with tapered shaft 1a, tapered shaft 1a makes slips 4 to extending out in pressure process , so that slips 4 is stung tighter to fish;In the process, the tight degree of stinging of slips 4 and fish can be by pawl 6 and ratchet Cooperation between 1b guarantees;Due to the effect of torsional spring 7, ratchet mandrel 1 can move down easily relative to pawl 6 and can not be inverse To movement, thus pawl 6 act on ratchet 1b different location also represent slips 4 it is different from fish sting tight degree.When need by When the fishing device exits fish, then the cooperation between pawl 6 and ratchet 1b must be removed, since slips 4 and fish are stung tightly, this When then can be rotated the fishing device pawl 6 is acted on the tapered shaft 1a of no ratchet 1b, at this time since pawl 6 can not limit Ratchet mandrel 1 processed makes top drilling tool radial contraction a little of slips 4 in upper propose, so that the fishing device is proposed shaft bottom.
Specific embodiment described above is used for the range illustrated the present invention without limiting the present invention, the skill of any this field Art personnel equivalent changes and modifications made under the premise of not departing from conceptions and principles of the invention, belong to present system Protection scope.

Claims (1)

1. a kind of ratchet type down-hole fishing device, mainly by ratchet mandrel (1), spring (2), baffle ring (3), slips (4), guide cone (5), pawl (6), torsional spring (7) and pin shaft (8) composition, it is characterised in that: the ratchet mandrel (1) is multi-diameter shaft, is equipped with taper Axis (1a), ratchet (1b) and connection screw thread (1c);The ratchet (1b) is located on tapered shaft (1a) and only along tapered shaft (1a) circle Cover 180 ° week;The spring (2) is sleeved on ratchet mandrel (1) outside, and the upper end acts on the step bottom of ratchet mandrel (1) Face, lower end act on the top surface of baffle ring (3);The baffle ring (3) is installed on ratchet mandrel (1) for limited spring (2);It is described Slips (4) is equipped with looping pit (4a), back-off (4b), cannelure (4c), ratchet slot (4d), conical cavity (4e), pin hole (4f) and torsional spring Hole (4g);The quantity of the looping pit (4a) and cannelure (4c) is three, and being arranged circumferentially along slips (4);The spine The quantity of tooth socket (4d) and pin hole (4f) is two, and along the circumferentially-spaced 120 ° of arrangements of slips (4);The cannelure (4c) is by slips (4) three parts are divided into, so that slips (4) can be compressed and be strutted;The slips (4) is sleeved on ratchet mandrel (1), and And conical cavity (4e) and matching for ratchet mandrel (1) are combined into clearance fit;The guide cone (5) and ratchet mandrel (1) pass through screw thread Connection, the upper end of guide cone (5) are used to limit the axial movement of slips (4);The pawl (6) passes through torsional spring (7) and pin shaft (8) It is assemblied on slips (4);When carrying out fishing, according to the specification of fishing device described in fish hydrophthalmia size selection, and block The outer diameter of watt (4) should be 1~3mm bigger than fish hydrophthalmia size;When operation, fishing device is slowly transferred, is fallen when fishing device enters At the moment, since slips (4) size is greater than fish hydrophthalmia size, slips (4) is radially compressed fish and water, when in slips (4) and fish When frictional force between wall is greater than the elastic force of spring, slips (4) stopping is moved down, and continues pressurization decentralization fishing device, at this time spine Tooth core axis (1) is moved downward relative to slips (4), and tapered shaft (1a) struts slips (4), so that slips (4) passes through back-off (4b) bites fish;When stopping transferring fishing device, pawl (6) is caught in ratchet (1b) under the action of torsional spring (7), so that Slips (4) remains that softened state bites fish;It is upper mention fishing device after, fish is taken out;Card is met if salvaged, it can not It is normal to take out fish, then ratchet mandrel (1) is rotated 180 °, so that pawl (6) is separated with ratchet (1b), then above mentions salvaging dress It sets, ratchet mandrel (1) is moved upwards relative to slips (4), and slips (4) retraction decontrols fish, can exit fishing device and fall Fish.
CN201810866622.0A 2018-08-01 2018-08-01 Ratchet type is fishing device in pit Active CN108952614B (en)

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Application Number Priority Date Filing Date Title
CN201810866622.0A CN108952614B (en) 2018-08-01 2018-08-01 Ratchet type is fishing device in pit

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CN108952614B CN108952614B (en) 2020-08-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110984897A (en) * 2019-11-27 2020-04-10 淮安市井神钻采机具有限公司 Fishing spear with co-operation of inner slip and outer slip

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570598A (en) * 1969-05-05 1971-03-16 Glenn D Johnson Constant strain jar
US5024272A (en) * 1990-05-07 1991-06-18 Halliburton Logging Services, Inc. Drill pipe downhole unthreading apparatus
CN201695980U (en) * 2009-08-14 2011-01-05 重庆望江工业有限公司 Slider overshot
CN203081382U (en) * 2012-11-27 2013-07-24 贵州高峰石油机械股份有限公司 Releasable fishing socket
CN104265235A (en) * 2014-09-15 2015-01-07 四机赛瓦石油钻采设备有限公司 Hydraulic-setting large-size detachable insertion tube packer
CN104358538A (en) * 2014-11-06 2015-02-18 长江大学 Special fishing spear for fishing of fishes of continuous oil pipe
CN205370491U (en) * 2015-12-31 2016-07-06 中国石油天然气股份有限公司 Fishing tool
CN206668200U (en) * 2017-05-02 2017-11-24 韩晓晖 A kind of fish fishing spear
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
CN206830123U (en) * 2017-05-17 2018-01-02 四机赛瓦石油钻采设备有限公司 A kind of HTHP packer of band elasticity deblocking ratchet and balance bypass

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570598A (en) * 1969-05-05 1971-03-16 Glenn D Johnson Constant strain jar
US5024272A (en) * 1990-05-07 1991-06-18 Halliburton Logging Services, Inc. Drill pipe downhole unthreading apparatus
CN201695980U (en) * 2009-08-14 2011-01-05 重庆望江工业有限公司 Slider overshot
CN203081382U (en) * 2012-11-27 2013-07-24 贵州高峰石油机械股份有限公司 Releasable fishing socket
CN104265235A (en) * 2014-09-15 2015-01-07 四机赛瓦石油钻采设备有限公司 Hydraulic-setting large-size detachable insertion tube packer
CN104358538A (en) * 2014-11-06 2015-02-18 长江大学 Special fishing spear for fishing of fishes of continuous oil pipe
CN205370491U (en) * 2015-12-31 2016-07-06 中国石油天然气股份有限公司 Fishing tool
CN206668200U (en) * 2017-05-02 2017-11-24 韩晓晖 A kind of fish fishing spear
CN206830123U (en) * 2017-05-17 2018-01-02 四机赛瓦石油钻采设备有限公司 A kind of HTHP packer of band elasticity deblocking ratchet and balance bypass
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

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黄河: "露天穿孔钻具打捞器研制", 《矿山机械》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110984897A (en) * 2019-11-27 2020-04-10 淮安市井神钻采机具有限公司 Fishing spear with co-operation of inner slip and outer slip

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