CN112145113B - Fishing device - Google Patents
Fishing device Download PDFInfo
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- CN112145113B CN112145113B CN201910578738.9A CN201910578738A CN112145113B CN 112145113 B CN112145113 B CN 112145113B CN 201910578738 A CN201910578738 A CN 201910578738A CN 112145113 B CN112145113 B CN 112145113B
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- 230000008093 supporting effect Effects 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 241000251468 Actinopterygii Species 0.000 description 37
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 9
- 235000017491 Bambusa tulda Nutrition 0.000 description 9
- 241001330002 Bambuseae Species 0.000 description 9
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 9
- 239000011425 bamboo Substances 0.000 description 9
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000003129 oil well Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Marine Sciences & Fisheries (AREA)
Abstract
The invention discloses a fishing device, and belongs to the field of underground fishing. The device comprises: the device comprises an upper joint, a slip cylinder, a limiting piece, an elastic component, a slip, a righting foundation and a supporting seat; one end of the upper joint is connected with one end of the slip cylinder, and the other end of the upper joint is used for being connected with a fishing instrument; the limiting piece and the slip are sequentially positioned in the slip cylinder from top to bottom, and the limiting piece is communicated with the upper joint and the slip cylinder; the supporting seat is positioned at the lower end in the slip cylinder, and the slip abuts against the supporting seat; the elastic component is sleeved on the limiting piece, and one end of the elastic component abuts against the bottom end of the upper joint; righting the basis includes: the first guide body and the centralizing body are sequentially connected from bottom to top, the centralizing body is connected with the slip cylinder, the first guide body and the centralizing body are provided with a first through hole along the central axial direction, and the first through hole is communicated with the slip cylinder; the outer wall of the upper joint is provided with a liquid discharge hole which is communicated with the slip cylinder. The invention improves the success rate and efficiency of salvaging.
Description
Technical Field
The invention relates to the field of underground fishing, in particular to a fishing device.
Background
In the process of oil exploitation, the tool often falls into an oil well or is damaged in the oil well. At this time, in order to ensure the normal production of the oil well, a fishing device is required to fish the tool dropped or damaged in the oil well.
The related art provides a fishing device including: the anchor rod comprises an upper connector, a slip cylinder, a pressure spring, a slip and a centralizing foundation, wherein one end of the upper connector is connected with the slip cylinder, the other end of the upper connector is used for being connected with a fishing instrument, the slip and the pressure spring are located in the slip cylinder, and the centralizing foundation is connected with the bottom end of the slip cylinder.
The inventors found that the related art has at least the following problems:
the upper part of the well falling instrument can store up dead oil or dirt, and in the fishing process, the dead oil or the dirt on the upper part of the well falling instrument can block the inner space of the slip cylinder, so that the fish top of the well falling instrument can not be contacted with the slip, and fishing can not be completed.
Disclosure of Invention
The embodiment of the invention provides a fishing device, which can solve the technical problem. The technical scheme is as follows:
a fishing device, the device comprising: the device comprises an upper joint, a slip cylinder, a limiting piece, an elastic component, a slip, a centralizing foundation and a supporting seat;
one end of the upper joint is connected with one end of the slip cylinder, and the other end of the upper joint is used for being connected with a fishing instrument; the limiting piece and the slips are sequentially positioned in the slip cylinder from top to bottom, and the limiting piece is communicated with the upper joint and the slip cylinder; the supporting seat is positioned at the lower end in the slip cylinder, and the slip abuts against the supporting seat;
the elastic component is sleeved on the limiting piece, and one end of the elastic component abuts against the bottom end of the upper joint;
the righting foundation comprises: the first guide body and the centralizing body are sequentially connected from bottom to top, the centralizing body is connected with the slip cylinder, the first guide body and the centralizing body are provided with a first through hole along the central axial direction, and the first through hole is communicated with the slip cylinder;
and a liquid discharge hole is formed in the outer wall of the upper joint and communicated with the slip cylinder.
In a possible implementation manner, the bottom end of the limiting part is provided with a limiting seat, the limiting seat abuts against the slip, and the other end of the elastic component abuts against the limiting seat.
In one possible implementation, the apparatus further includes: a second guide body; the second guide body is positioned at the lower end of the supporting seat, and the inner wall of the lower end of the slip cylinder is arranged along the circumferential direction.
In one possible implementation, the slip comprises: a first slip and a second slip; the first slip and the second slip are oppositely arranged, and the inner diameters of the first slip and the second slip are sequentially reduced from top to bottom; the first slip and the second slip are abutted against the limiting part at the upper end, and the lower end is abutted against the righting body.
In a possible implementation manner, a boss is arranged at the bottom end of the upper joint, the boss is located in the slip cylinder, and one end of the elastic component abuts against the boss.
In a possible implementation manner, the limiting member has a second through hole in the central axial direction, and the second through hole is communicated with both the liquid discharge hole and the slip cylinder.
In a possible implementation manner, the upper end of the limiting member is provided with a third through hole along the circumferential direction, and the third through hole is used for a lifting rod to pass through and lift the limiting member upwards.
In one possible implementation mode, the upper connector is detachably connected with the slip barrel.
In a possible implementation manner, the first guiding body is in a horn mouth shape, and the outer wall of the righting body is detachably connected with the inner wall of the slip cylinder.
In a possible realization, the opening angle of the bell mouth of the first guiding body is 55-65 °.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the fishing device provided by the embodiment of the invention has the following working principle:
the device comprises an upper connector, a slip barrel, a first guide body, a second guide body, a slip barrel, a slip sleeve and a slip sleeve, wherein one end of the upper connector is connected with a fishing instrument, the slip barrel is arranged in the well, the first guide body is used for primarily guiding underground falling objects, the underground falling objects are righted through the righting body, the slip barrel is convenient to enter the slip barrel, after the fish top of the falling instrument enters the slip barrel, the fish top of the falling instrument props against the slip to move upwards, the slip drives the limiting part and the elastic part on the limiting part to move upwards, the fish top of the falling instrument enters the slip, the limiting part moves downwards under the action of the elastic part when the falling instrument is lifted through a fishing instrument lifting device, the slip is sleeved on the fish top of the falling instrument and continues to lift the device, the falling instrument is lifted out of the well, and dead oil or dirty oil on the fish top of the falling instrument is discharged through a drain hole in the outer wall of the upper connector during lifting process.
By the aid of the device, fishing efficiency is improved, the condition that the fishing fails due to the fact that the slip cylinder is blocked by dead oil or dirt on the top of a fish of a well-falling instrument is avoided, and fishing success rate is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a fishing device provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a top terminal structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a centralizing infrastructure provided by an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a fishing device provided by an embodiment of the invention;
FIG. 5 is a schematic structural view of a fishing device provided by an embodiment of the invention;
FIG. 6 is a schematic view of a slip configuration provided by an embodiment of the present invention;
fig. 7 is a schematic view of a limiting member structure according to an embodiment of the invention.
The reference numerals denote:
1-upper joint, 101-drain hole, 102-second through hole, 103-third through hole, 2-slip cylinder, 3-limiting piece, 31-limiting seat, 4-elastic component, 5-slip, 51-first slip, 52-second slip, 53-slip tooth, 6-righting foundation, 61-first guide body, 62-righting body, 7-supporting seat and 8-second guide body.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
At present to the salvage of well instrument generally adopt be conventional overshot, through the field operation discovery many times, conventional overshot's simple structure, function singleness are suitable for and salvage the operation scope little, and it is low to salvage the success rate, generally has certain limitation, specifically has following not enoughly:
on the one hand, in the process of implementing fishing by the slip cylinder 2 provided by the related art, dead oil or other dirt on the upper part of the well-falling instrument blocks the inner space of the slip cylinder 2, so that the top of a fish of the well-falling instrument can not completely enter the slip cylinder 2 and is contacted with the slips 5, and the fishing operation is failed.
On the other hand, a retaining ring is arranged between the elastic component 4 and the slips 5 in the conventional fishing barrel, so that the acting force of the elastic component 4 can be uniformly applied to the upper planes of the two symmetrical slips 5, and the slip teeth 53 on the two slips 5 are kept at relatively fixed positions in the slip barrel 2, but in the actual fishing operation process, the well-dropping instrument is often in an inclined state in a shaft, when the well-dropping instrument is contacted with the slip barrel 2, the fish top of the well-dropping instrument can impact the bottom of the slip 5 on one side, the slip 5 on one side is forced to move upwards and push the upper retaining ring, so that the two slips 5 are dislocated, and the fishing failure is caused.
Finally, the bottom of a conventional slip cylinder 2 is provided with a guide shoe in a horn mouth shape, the function of the guide shoe is that when a falling object instrument is fished, the top of a fish dropped into the well instrument enters the slip cylinder 2 through the guide shoe, but the defects of two aspects exist, one is that the effect of the guide shoe is poor, the guide shoe is formed by scraping the inner side of the lower part of the slip cylinder 2 into the horn mouth shape with a certain angle, and the effect of the guide shoe is poor due to the restriction of the outer diameter of the slip cylinder 2. When the inclination angle of the well-falling instrument is too large in the underground, the guide shoe can not accurately guide the falling object into the slip cylinder 2, and meanwhile, 5 slips can be overturned in the process of guiding the falling object into the slip cylinder 2, so that the fishing operation is failed. Secondly, the function is single, application scope receives the limitation, general guide shoe and slips section of thick bamboo 2 formula structure as an organic whole, and the external diameter is the same with slips section of thick bamboo 2 external diameter, just need according to junk situation and characteristics when salvaging the downhole junk of different pipe diameters, tailor the slips section of thick bamboo 2 of the same external diameter, and the external diameter size of slips section of thick bamboo 2 that uses at present has realized standardizing, if only make external diameter assorted fishing device alone in order to salvage the instrument of falling well in the different pipe diameters, not only increased the expenditure of cost, also can influence the fishing operation progress. In view of this, the embodiment of the present invention provides a fishing device to overcome the defects of the prior art.
An embodiment of the present invention provides a fishing device, as shown in fig. 1, the fishing device includes: the device comprises an upper joint 1, a slip cylinder 2, a limiting piece 3, an elastic component 4, a slip 5, a righting foundation 6 and a supporting seat 7;
one end of the upper joint 1 is connected with one end of the slip cylinder 2, and the other end of the upper joint 1 is used for being connected with a fishing instrument; the limiting piece 3 and the slips 5 are sequentially positioned in the slip cylinder 2 from top to bottom, and the limiting piece 3 is communicated with the upper joint 1 and the slip cylinder 2; the supporting seat 7 is positioned at the lower end in the slip cylinder 2, and the slip 5 abuts against the supporting seat 7;
the elastic component 4 is sleeved on the limiting component 3, and one end of the elastic component 4 is abutted against the bottom end of the upper joint 1;
righting basis 6 includes: the first guide body 61 and the righting body 62 are sequentially connected from bottom to top, the righting body 62 is connected with the slip cylinder 2, the first guide body 61 and the righting body 62 are provided with a first through hole along the central axial direction, and the first through hole is communicated with the slip cylinder 2;
the outer wall of the upper joint 1 is provided with a liquid discharge hole 101, and the liquid discharge hole 101 is communicated with the slip cylinder 2.
The fishing device provided by the embodiment of the invention has the following working principle:
one end of the upper connector 1 is connected with a fishing instrument, the slip cylinder 2 is put into a well, the first guide body 61 is used for primarily guiding the falling objects in the well, the righting body 62 is used for righting the falling objects in the well, the falling objects are convenient to enter the slip cylinder 2, after the fish top of the falling instrument enters the slip cylinder 2, the fish top of the falling instrument props against the slip 5 to move upwards, the slip 5 drives the limiting part 3 and the elastic part 4 on the limiting part 3 to move upwards, so that the fish top of the falling instrument enters the slip 5, the fishing instrument lifting device is used for lifting the limiting part 3 downwards under the action of the elastic part 4, the slip 5 is sleeved on the fish top of the falling instrument and continues to lift the device, the falling instrument is lifted out of the well, and the dead oil or dirty oil on the fish top of the falling instrument in the lifting process is discharged through the liquid discharge hole 101 in the outer wall of the upper connector 1.
The device provided by the embodiment of the invention at least has the following technical effects:
by the aid of the device, fishing efficiency is improved, the condition that the slip cylinder 2 is blocked by dead oil or dirt on the top of a fish of a well-falling instrument to cause fishing failure is avoided, and fishing success rate is improved.
As an example, the elastic component 4 provided in the embodiment of the present invention may be a compression spring, when the compression spring is sleeved on the limiting member 3, one end of the compression spring abuts against the upper joint 1, and the limiting member 3 is compressed by its own elastic force to move toward the slip 5 and abut against the slip 5, so as to prevent the slip 5 from moving. When the slips 5 is withstood in the fish jack of the well-falling instrument, the slips 5 push the limiting part 3 to move upwards, the pressure spring is compressed under the movement of the limiting part 3, when the device is lifted upwards, the limiting part 3 moves downwards, the pressure spring extends, and then the limiting part 3 is pushed to move downwards, so that the slips 5 are tightly buckled on the fish jack of the well-falling instrument.
Because when lifting the device, slips 5 can be in the downward motion of the pressure of locating part 3, finally make the fish top of well instrument get into slips 5 in, because when lifting the device, slips 5 can be the downward motion, through setting up supporting seat 7, slips 5 and supporting seat 7 counterbalance, provide the holding power to slips 5 and reach the purpose of lifting well instrument.
As an example, the supporting seat 7 may be a supporting step arranged along the circumferential direction of the inner wall of the bottom of the slip cylinder 2, and the supporting step may be welded to the inner wall of the slip cylinder 2, or may be integrally formed by stamping, so as to improve the supporting effect of the supporting seat 7.
When the fishing device provided by the related art is lifted, the slips 5 are pulled out of the slip cylinder 2 due to the overlarge weight of a well-falling instrument, so that the fishing is failed, secondary falling objects in an oil well can be caused, and the fishing difficulty is increased. This embodiment is through setting up supporting seat 7, and with supporting seat 7 and the 2 inner walls welding of a slips section of thick bamboo or punching press integrated into one piece, avoids because the weight of well instrument is too big, outside pulling out a slips section of thick bamboo 2 with slips 5, and then avoids causing the secondary junk. Compared with the related technology, the efficiency of salvaging is improved, and the difficulty of salvaging is reduced.
It will be appreciated that since the well tool is to be passed through the first through hole into the slip cylinder 2, the diameter of the first through hole should be matched to the diameter of the well tool.
In one possible implementation, as shown in fig. 2, the drain hole 101 may be a cylindrical hole, or may be a rectangular, rectangular or trapezoidal hole, as long as the purpose of draining the dead oil or dirt on the top of the fish of the well-falling instrument is achieved. The fishing device that correlation technique provided can't improve the degree of difficulty of salvaging to the dead oil or dirty discharge on instrument fish top of falling into the well, sets up outage 101 through this embodiment on the top connection, can realize having improved the efficiency of salvaging to instrument fish top dead oil or dirty outer arranging of falling into the well, has reduced the degree of difficulty of salvaging.
Fig. 3 shows an example of the centralizing foundation 6, the first guiding body 61 may be a cone with a reference taper, and the centralizing body 62 may be a cylinder, and the cylinder and the cone are sequentially connected from top to bottom.
In a possible implementation manner, as shown in fig. 4, the bottom end of the limiting member 3 has a limiting seat 31, the limiting seat 31 abuts against the slip 5, and the other end of the elastic member 4 abuts against the limiting seat 31.
The limiting piece 3 provided by the embodiment of the invention is a cylindrical pipe body, and the limiting seat 31 is arranged at the bottom end of the pipe body, so that the limiting seat 31 is abutted against the slip 5, and the limiting of the slip 5 is realized. Illustratively, the stopper seat 31 may be a step provided in a circumferential direction of the pipe body. The elastic part 4 is sleeved on the pipe body and is propped against the step. It is understood that the diameter of the step is larger than the inner diameter of the elastic member 4 so that the elastic member 4 does not come off the step.
In one possible implementation, as shown in fig. 5, the apparatus further includes: a second guide body 8; the second guiding body 8 is positioned at the lower end of the supporting seat 7 and is arranged on the inner wall of the lower end of the slip cylinder 2 along the circumferential direction.
The second guiding body 8 provided by the embodiment can be a hollow cone arranged on the inner wall of the lower end of the slip cylinder 2 along the circumferential direction, and the direction angle of the hollow cone from the slip cylinder 2 to the righting body 62 is gradually increased, so that the second righting of the well-falling instrument is realized.
By way of example, the hollow cone may have a cone angle of 60 °.
For example, the second guiding body 8 and the inner wall of the slip cylinder 2 may be welded or may be formed by punching.
In one possible implementation, as shown in fig. 6, the slips 5 include: a first slip 51 and a second slip 52; the first slip 51 and the second slip 52 are arranged oppositely, and the inner diameter is reduced from top to bottom; the upper ends of the first slip 51 and the second slip 52 are respectively abutted against the limiting member 3, and the lower ends thereof are respectively abutted against the righting body 62.
Through setting up relative first slips 51 and the second slips 52 that set up, when the fish top of well instrument produced pressure to slips 5, first slips 51 and second slips 52 were squeezed open, and well instrument is wrapped up by slips 5, realizes salvaging to well instrument when lifting the device.
As an example, a plurality of slip elements 53 are provided between the first slip 51 and the second slip 52, and engagement with the fish head of the well-lowering tool is achieved by the slip elements 53.
The inner diameters of the first slip 51 and the second slip 52 are sequentially reduced from top to bottom, so that the engagement force of the well-falling instrument can be improved when the well-falling instrument is lifted, and the well-falling instrument is prevented from falling midway.
In a possible implementation mode, the lower end of the upper joint 1 is provided with a boss, the boss is positioned in the slip cylinder 2, and one end of the elastic component 4 is abutted against the boss.
The lower end of the upper connector 1 provided by the embodiment is provided with a shoulder, a boss of the shoulder is positioned in the slip cylinder 2, and the boss is propped against the top end of the slip cylinder 2. The connection between the slip cylinder 2 is realized. One end of the elastic component 4 is abutted against the boss, so that when the limiting part 3 moves upwards, the elastic component 4 cannot move out of the limiting part 3.
In one possible implementation, as shown in fig. 7, the limiting member 3 has a second through hole 102 in the central axial direction, and the second through hole 102 communicates with both the drain hole 101 and the slip cylinder 2.
The limiting part 3 that this embodiment provided is located slip section of thick bamboo 2, sets up second through-hole 102 through the central circumference at limiting part 3, can reach the purpose that holds the instrument of falling into the well, can also discharge the dead oil or dirty on the instrument fish top of falling into the well.
For example, the stopper 3 may be a hollow tube.
In a possible realization, as shown in fig. 7, the upper end of the retaining element 3 has a third through-hole 103 in the circumferential direction, the third through-hole 103 being used for a lifting rod to pass through and lift the retaining element 3 upwards.
By arranging the third through hole 103 at the upper end of the limiting member 3 along the circumferential direction, after the device is lifted, a pull rod, such as a screwdriver, can penetrate through the third through hole 103 to move the limiting member 3 upwards, so that the slip 5 is separated from the acting force of the elastic component 4, the well-falling instrument is taken out, and fishing is completed.
As an example, the size of the third through hole 103 is not too large, as long as the effect of the pull rod or the like passing through and lifting up the stopper 3 is satisfied. The number of the third through holes 103 may be two symmetrically arranged, or four symmetrically arranged.
By way of example, the third through hole 103 may be a circular, rectangular, square, or irregularly shaped through hole.
In one possible implementation, the upper joint 1 and the slip cylinder 2 are detachably connected.
The upper joint 1 and the slip cylinder 2 may be in threaded connection, and for example, an external thread may be provided on the outer wall of the upper joint 1, and an internal thread may be provided on the inner wall of the upper end of the slip cylinder 2. Or an internal thread is arranged on the outer wall of the upper joint 1, and an external thread is arranged on the inner wall of the upper end of the slip cylinder 2.
In a possible implementation manner, the first guiding body 61 is in a bell mouth shape, and the outer wall of the righting body 62 is detachably connected with the inner wall of the slip cylinder 2.
The outer wall of the centralizing body 62 and the inner wall of the slip bowl 2 may be threaded. Through setting up the detachable connection between slip section of thick bamboo 2 and the body 62 of righting, can be according to the size change of well instrument and right the basis, and need not change whole fishing device.
The fishing device that correlation technique provided need be changed whole fishing device and salvage again when the well instrument that falls of equidimension not, and the practicality is low, the operation is complicated. Compared with the device provided by the related technology, the device provided by the embodiment of the invention has the advantages that the practicability is high, the operation is simple, the fishing time is shortened, the manufacturing cost of the device is reduced, and the fishing efficiency is improved.
In one possible implementation, the opening angle of the bell mouth of the first guide body 61 is 55 ° to 65 °.
The angle of the bell mouth of the first guiding body 61 can be determined according to the size of the instrument to be fished in actual operation. For example, when the diameter of the instrument to be salvaged is larger, the angle of the bell mouth of the first guide body 61 can be larger, and when the diameter of the instrument to be salvaged is smaller, the angle of the bell mouth of the first guide body 61 can be smaller. As an example, the size of the flare of the first guide body 61 may be 60 °.
Adopt punching press integrated into one piece between first guide body 61 and the body 62 of rightting, can guarantee that first guide body 61 can not take place to remove under the head-on collision that receives the instrument fish top of falling into the well, improved the efficiency of direction.
Based on the structure of the fishing device, the embodiment of the invention provides an example, and the using process of the fishing device is further described.
And selecting the centralizing foundation 6 with corresponding specification according to the different sizes of the underground oil pipe of the well falling instrument and tools or casings in the well shaft. For example, to fish a well tool in an eccentric injection well, the maximum outer diameter of the first guide body 61 is selected to be 42-38mm. When fishing in a 21/2 inch tubing downhole, the maximum outer diameter of the first guide body 61 is selected to be 58-54mm. The maximum outer diameter of the first guide body 61 is selected to be 120-116mm when fishing in a 51/2 inch cased well.
The fishing device is connected with a fishing steel wire or a cable, the fishing steel wire or the cable is stably placed to the upper part of a well falling instrument in a shaft for 3-5m at the speed of not more than 1000m/h (unit: m/h), the fishing steel wire or the cable is repeatedly lifted for 2-3 times for 10m, and tension data before fishing is confirmed.
Then the fishing device is lowered at the same speed, and the fishing device is located on the top of the fish of the well-falling instrument under the action of the self weight of the fishing instrument. Because the first guide body 61 is the horn mouth that the angle is 60 degrees, the first guide body 61 is leading-in to the body 62 of righting with the fish top of well instrument that falls, and the fish top of well instrument that falls is when upwards passing through the body 62 of righting, and the body 62 of righting is right well instrument that falls for the first time, makes well instrument that falls keep relative perpendicular with slip section of thick bamboo 2. When the fish top of the well-falling instrument reaches the second guide body 8 at the upper end of the righting body 62, the second guide body 8 is a 60-degree hollow cone, so that the second guide body 8 is used for conducting secondary guide righting on the well-falling instrument, and the well-falling instrument is finally perpendicular to the slip cylinder 2.
After the fish top of the well-falling instrument enters the slip cylinder 2, the fish top of the well-falling instrument props against the first slip 51 and the second slip 52 to move upwards, the first slip 51 and the second slip 52 drive the limiting seat 31 at the lower part of the limiting part 3 to move upwards in parallel along the axis along the central through hole in the slip cylinder 2 when moving upwards, so that the first slip 51 and the second slip 52 are opened, and the fish top of the well-falling instrument enters the slip teeth 53 of the first slip 51 and the second slip 52 at the moment.
When the fishing device is lifted up, the limiting seat 31 moves downwards along the central through hole of the slip cylinder 2 under the action of the elastic component 4 sleeved on the limiting component 3, so that the slip teeth 53 on the first slip 51 and the second slip 52 clamp the top of a fish of a well-dropping instrument, when the pulling force of the lifting fishing device is large, the bottom ends of the first slip 51 and the second slip 52 are located on the supporting seat 7, the supporting force of the first slip 51 and the second slip 52 is increased through the supporting seat 7, and the first slip 51 and the second slip 52 are prevented from being pulled off.
In the salvaging process, the dirty oil, hard wax and the like on the upper part of the top of the fish of the well-falling instrument enter the slip cylinder 2 along with the well-falling instrument, the dirty oil or the dirty oil can upwards move into the liquid discharge hole 101 in the outer wall of the upper joint 1 through the second through hole 102 in the middle of the limiting part 3, and the dirty oil or the dirty oil is discharged to the outside of the slip cylinder 2 through the liquid discharge hole 101, so that the salvaging success rate is effectively improved.
The fishing device is lifted by fishing the steel wire or the cable, the tension change condition is observed, and if the tension data is increased compared with the tension data before fishing, the fishing device is proved to have fished the well-falling instrument, and the underground fishing action is completed. The fishing device is lifted stably at the speed not exceeding 1000m/h continuously, when the fishing device passes through the reducing pipe column in the lifting process, the first guide body 61 plays a primary guide role to prevent the fishing device from being blocked at the reducing position, the fishing device is lifted to the wellhead continuously after passing through the reducing pipe column, then the fishing device is placed on the ground, an operator inserts the screw driver into the third through hole 103 at the upper end of the limiting part 3 and moves the limiting part 3 upwards to enable the slip 5 to be separated from the acting force of the elastic part 4, and the well-falling instrument is taken out to finish the fishing.
The effect analysis of the salvage by the device provided by the embodiment of the invention and the salvage by the conventional salvage device is shown in table 1:
TABLE 1
As can be seen from Table 1, the fishing success rate of the device provided by the embodiment of the invention is far higher than that of the fishing device provided by the related art.
All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.
The above description is only an illustrative embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A fishing device, the device comprising: the device comprises an upper joint (1), a slip cylinder (2), a limiting piece (3), an elastic component (4), a slip (5), a centralizing foundation (6) and a supporting seat (7);
one end of the upper connector (1) is connected with one end of the slip cylinder (2), and the other end of the upper connector (1) is used for being connected with a fishing instrument; the limiting piece (3) and the slips (5) are sequentially positioned in the slip cylinder (2) from top to bottom, and the limiting piece (3) is communicated with the upper joint (1) and the slip cylinder (2); the supporting seat (7) is positioned at the lower end in the slip cylinder (2), and the slip (5) is abutted against the supporting seat (7);
the elastic component (4) is sleeved on the limiting piece (3), and one end of the elastic component (4) is abutted against the bottom end of the upper joint (1);
the righting foundation (6) comprises: the device comprises a first guide body (61) and a righting body (62) which are sequentially connected from bottom to top, wherein the righting body (62) is connected with a slip cylinder (2), the first guide body (61) and the righting body (62) are provided with a first through hole along the central axial direction, and the first through hole is communicated with the slip cylinder (2);
the outer wall of the upper joint (1) is provided with a liquid discharge hole (101), and the liquid discharge hole (101) is communicated with the slip cylinder (2);
the supporting seat (7) is a supporting step arranged along the circumferential direction of the inner wall at the bottom of the slip cylinder (2), and the supporting step is connected with the inner wall of the slip cylinder (2).
2. The device according to claim 1, characterized in that the bottom end of the limiting member (3) is provided with a limiting seat (31), the limiting seat (31) is abutted against the slip (5), and the other end of the elastic member (4) is abutted against the limiting seat (31).
3. The apparatus of claim 1, further comprising: a second guide body (8); the second guide body (8) is located at the lower end of the supporting seat (7), and the inner wall of the lower end of the slip cylinder (2) is arranged along the circumferential direction.
4. The apparatus according to claim 1, characterized in that said slips (5) comprise: a first slip (51) and a second slip (52); the first slip (51) and the second slip (52) are arranged oppositely, and the inner diameter of the first slip and the inner diameter of the second slip are sequentially reduced from top to bottom; the upper ends of the first slip (51) and the second slip (52) are respectively abutted against the limiting piece (3), and the lower ends of the first slip and the second slip are respectively abutted against the righting body (62).
5. The device according to claim 1, characterized in that the bottom end of the upper joint (1) has a boss, which is located inside the slip cylinder (2), against which one end of the elastic member (4) abuts.
6. The device according to claim 1, characterized in that the retaining member (3) has a second through hole (102) in the central axial direction, and the second through hole (102) is communicated with the drain hole (101) and the slip cylinder (2).
7. Device according to any one of claims 1-6, characterized in that the upper end of the retaining element (3) is provided with a third through hole (103) in the circumferential direction, which third through hole (103) is intended for a lifting rod to pass through and lift the retaining element (3) upwards.
8. The device according to any one of claims 1 to 6, characterized in that the upper joint (1) and the slip cylinder (2) are detachably connected.
9. The device according to any one of claims 1 to 6, characterized in that the first guide body (61) is flared, and the outer wall of the righting body (62) is detachably connected with the inner wall of the slip cylinder (2).
10. Device according to claim 9, characterized in that the opening angle of the bell mouth of the first guide body (61) is 55 ° -65 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578738.9A CN112145113B (en) | 2019-06-28 | 2019-06-28 | Fishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578738.9A CN112145113B (en) | 2019-06-28 | 2019-06-28 | Fishing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112145113A CN112145113A (en) | 2020-12-29 |
| CN112145113B true CN112145113B (en) | 2022-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910578738.9A Active CN112145113B (en) | 2019-06-28 | 2019-06-28 | Fishing device |
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| Country | Link |
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| CN (1) | CN112145113B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2931764Y (en) * | 2007-01-16 | 2007-08-08 | 毛帮来 | Pumping rod fishing device |
| CN201428408Y (en) * | 2009-05-31 | 2010-03-24 | 辽河石油勘探局 | General overshot for oil well workover operation |
| US8607881B2 (en) * | 2010-12-08 | 2013-12-17 | National Oilwell Varco, L.P. | Heavy duty rope sockets and related methods |
| CN202108452U (en) * | 2011-06-10 | 2012-01-11 | 中国石油天然气股份有限公司 | Horizontal well lifting fishing barrel |
| CN202266223U (en) * | 2011-08-29 | 2012-06-06 | 中国石油化工股份有限公司 | Reversible downhole fallen article fishing barrel |
| CN202431243U (en) * | 2012-01-16 | 2012-09-12 | 刘江波 | Fishing socket for borehole operation |
| CN203066921U (en) * | 2013-02-19 | 2013-07-17 | 郭亮 | Fisher for fishing eccentric wear fish top |
| CN203948062U (en) * | 2013-12-06 | 2014-11-19 | 中国石油天然气股份有限公司 | Returnable core-through slip socket |
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2019
- 2019-06-28 CN CN201910578738.9A patent/CN112145113B/en active Active
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| CN112145113A (en) | 2020-12-29 |
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