CN112502656A - Screw type local reverse circulation milling fishing tool - Google Patents
Screw type local reverse circulation milling fishing tool Download PDFInfo
- Publication number
- CN112502656A CN112502656A CN202011071287.9A CN202011071287A CN112502656A CN 112502656 A CN112502656 A CN 112502656A CN 202011071287 A CN202011071287 A CN 202011071287A CN 112502656 A CN112502656 A CN 112502656A
- Authority
- CN
- China
- Prior art keywords
- screw
- annular boss
- wall
- cylinder
- screw pump
- 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.)
- Granted
Links
- 238000003801 milling Methods 0.000 title claims abstract description 59
- 230000005291 magnetic effect Effects 0.000 claims abstract description 33
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 19
- 210000004907 gland Anatomy 0.000 claims description 14
- 229910052779 Neodymium Inorganic materials 0.000 claims description 11
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 18
- 238000010276 construction Methods 0.000 description 14
- 239000012634 fragment Substances 0.000 description 10
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000005294 ferromagnetic effect Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/06—Fishing for or freeing objects in boreholes or wells using magnetic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Marine Sciences & Fisheries (AREA)
- Food Science & Technology (AREA)
- Earth Drilling (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a screw type local reverse circulation casing milling fishing tool, which comprises a screw drill assembly, a flow guide joint, an outer working barrel, a casing milling barrel, a screw pump assembly, a grinding machine, a magnetic central pipe and a female cone, wherein the screw drill assembly, the flow guide joint, the outer working barrel and the casing milling barrel are sequentially connected from top to bottom; the tool changes the positive circulation liquid flow into local reverse circulation through each internally-arranged pore structure, negative pressure suction can be generated in the barrel relative to bottom-hole liquid without extra power through the mutual matching of a screw drilling tool and a screw pump, small falling objects are selectively adsorbed or broken and returned, and threading and milling can be simultaneously carried out by utilizing a female cone for making, reversing and fishing.
Description
Technical Field
The invention relates to the technical field of underground operation of oil and gas wells, in particular to a screw type local reverse circulation casing milling fishing tool.
Background
After the major repair well is invalid through movable unfreezing, an annular space between a falling object and a casing needs to be cleaned by using a sleeve milling method and then fished; the bottom hole junk is not suitable for direct fishing due to the fish top, and fishing treatment is carried out after the fish top is milled and trimmed; or small falling objects, scrap iron and the like exist at the bottom of the well, a fishing tool is needed to carry out fishing treatment, and the process is called casing milling and fishing construction in the underground operation.
At present, in the field construction process of major workover, for conventional casing milling construction, a double-ram blowout preventer is usually installed at a well mouth, a guide pipe is installed above the blowout preventer, a drill pipe with the diameter of phi 73mm is adopted as a well pipe column, the well mouth is connected with a kelly bar and a water faucet, a positive circulation working mode is established by utilizing pump injection equipment, the kelly bar is rotated through a rotary table to drive a drilling tool and a bottom tool to rotate, and meanwhile, proper drilling pressure is applied to perform casing and milling construction. For fishing construction, a fishing tool is arranged at the bottom of the pipe column, and the fishing operation is carried out in a positive circulation working mode. The casing milling and fishing construction mode has the advantages that the construction is simpler in a more conventional shallow well and a more conventional vertical well, the success rate is higher, but when a deep well, an inclined well and a leakage well, particularly a water injection well corrodes an oil pipe, the drilling accidents are very easily caused in the construction process because metal fragments in the well are extremely numerous and the mass of the metal fragments is difficult to return upwards.
In order to avoid the drilling blocking accident caused by difficult upward return of metal debris, methods such as pump injection displacement improvement, an integral reverse circulation working mode, frequent movable pipe column inspection whether a pipe column has a blocking phenomenon or not, long-time well washing after a section of footage is milled in a casing mode and the like are mostly adopted on site.
Therefore, an economical and efficient milling fishing tool needs to be designed urgently, milling can be performed quickly under the working conditions of conventional discharge capacity and pumping pressure, ferromagnetic metal fragments milled by the milling tool are sucked into the tool barrel, drilling jamming is effectively prevented, milling and fishing of fallen objects are completed at one time, the construction period is effectively shortened, construction cost can be reduced, cost reduction and efficiency improvement are achieved, and speed increasing is achieved.
Disclosure of Invention
The invention aims to provide a screw type local reverse circulation casing milling fishing tool which can effectively prevent drill jamming and simultaneously realize casing milling and fishing of fallen objects at one time.
Therefore, the technical scheme of the invention is as follows:
a screw type local reverse circulation milling fishing tool comprises a screw drilling tool assembly, a flow guide joint, an outer working barrel, a milling barrel, a screw pump assembly, a grinding machine, a magnetic central pipe and a female cone, wherein the screw drilling tool assembly, the flow guide joint, the outer working barrel and the milling barrel are sequentially connected from top to bottom; wherein,
the screw drill assembly comprises an upper joint, a bypass valve and a connecting outer cylinder which are sequentially connected from top to bottom, and a screw drill stator and a driving head are arranged in the connecting outer cylinder from top to bottom; the top end of the screw drill stator is connected with the lower port of the bypass valve, a screw drill rotor is assembled in the inner cavity of the screw drill stator, and a driving head is fixed at the bottom end of the screw drill rotor;
the flow guide joint consists of a cylindrical body and a sealing gland; the top end of the cylindrical body is connected with the bottom end of the connecting outer cylinder, the bottom end of the cylindrical body is fixed on the inner wall of the top end of the outer working cylinder, a first annular boss is arranged on the inner wall of the top end of the outer working cylinder, and a second annular boss is formed on the inner wall of the upper part of the first annular boss; a plurality of flow guide holes penetrating to the lower end face of the first annular boss are axially formed in the upper end face of the first annular boss, two backflow holes penetrating to the outside of the flow guide joint are obliquely and upwardly formed in the inner wall of the first annular boss below the second annular boss, the sealing gland is covered and fixed on the upper end face of the second annular boss, and a central through hole with the same inner diameter as that of the second annular boss is axially formed in the center of the sealing gland;
the screw pump assembly comprises a sieve tube type transmission shaft, a first universal shaft, a screw pump rotor and a screw pump stator; the sieve tube type transmission shaft consists of an upper cylinder body with an opening at the top and a closed bottom and a lower transmission shaft fixed on the bottom surface of the upper cylinder body; the top end of the upper cylinder is connected to the driving head, and a plurality of first sieve pores are uniformly distributed on the side wall of the upper cylinder; the lower transmission shaft is inserted into the central through hole of the sealing gland and forms sealing; the top end of the first universal shaft is connected with the bottom end of the lower transmission shaft, and the bottom end of the first universal shaft is fixed at the top end of the screw pump rotor; the top end of the screw pump stator is connected to the inner wall of the bottom end of the flow guide joint, and the inner cavity of the screw pump stator is provided with a screw pump rotor;
the magnetic central pipe comprises an aluminum central pipe, a plurality of first neodymium magnetic strong magnetic salvage blocks and a centralizer; the top end of the central pipe is connected with the bottom end of the screw pump stator; a plurality of neodymium magnetic strong magnetic salvage blocks are uniformly distributed and fixed on the inner wall of the central pipe along the circumferential direction, and the centralizer is fixed on the outer wall of the bottom end of the central pipe and forms a seal with the outer working barrel; the grinder is arranged on the inner side of the top of the central pipe, is linked with the screw pump rotor and drives the inner blade thereof to rotate and cut; a plurality of inclined jet holes are uniformly distributed on the side wall of the outer working barrel above the centralizer along the circumferential direction.
Furthermore, the plurality of flow guide holes are divided into two flow guide hole groups and symmetrically distributed on two sides of the first annular boss; the guide holes in each guide hole group are arranged in an equidistant mode; meanwhile, the two backflow holes are symmetrically arranged on the cylindrical body, and the two backflow holes and the two flow guide hole groups are alternately arranged; the included angle formed by the axial direction of the backflow hole and the axial direction of the cylinder body is 45 degrees.
Further, the aperture of the first sieve pore is 10 mm; the aperture of the second sieve mesh is 3 mm.
Further, the grinder includes a second cardan shaft, a perforated screen deck, blades, and a mounting assembly; the top end of the second universal shaft is connected to the bottom end of the screw pump rotor; the porous sieve plate is fixed on the inner wall of the central tube, and a plurality of second sieve pores are uniformly distributed on the disc surface of the porous sieve plate; the mounting assembly consists of a bolt and a nut, the blade is sleeved and fixed on the outer side of the inverted bolt, and the top end of the bolt penetrates through a central hole of the porous sieve plate and is fixed at the bottom end of the second universal shaft; the nut is arranged on the bolt in a penetrating way and is arranged between the bolt cap and the blade.
Furthermore, a third annular boss is convexly formed on the inner wall of the middle part of the female cone, the upper end face and the lower end face of the third annular boss are respectively processed into an upper conical surface and a lower conical surface, and a thread buckle for making the buckle is processed on the lower conical surface; two water passing grooves which are communicated up and down are symmetrically arranged on the inner wall of the female cone.
Furthermore, the water passing groove is a through groove with a semicircular radial section, and the radius of the semicircular section is 7.5 mm.
Further, the included angle formed by the axial direction of the jet hole formed in the side wall of the outer working barrel and the axial direction of the outer working barrel is 45 degrees.
Compared with the prior art, the screw type local reverse circulation casing milling fishing tool is suitable for the major repair operation of casing milling fishing of deep wells, inclined wells, leakage wells, corroded tubing fishing wells and the like, can be directly connected into a construction pipe column, enables the positive circulation liquid flow to be redirected into local reverse circulation through a flow passage conversion structure, can generate negative pressure suction effect on bottom liquid in a cylinder body through a screw drilling tool-screw pump rotating structure without additional power, adsorbs small ferromagnetic block falling objects through a magnetic central pipe, salvages tubing couplings or other falling objects at large-diameter parts through the female cone buckle, can also utilize the female cone to perform buckle, back buckle and fishing at the same time of casing milling, can reduce the probability of drilling blocking accidents caused by ferromagnetic fragments entering annular space under the conventional pump pressure and discharge capacity, completes casing milling once, shortens the construction period of casing milling fishing, and effectively saves the construction cost, the efficiency of the work of the cover milling salvage is greatly improved, the probability of the drill clamping accident caused by the metal fragments in the annular space is reduced, and the construction period of the cover milling salvage is shortened.
Drawings
FIG. 1 is a schematic structural view of a screw type local reverse circulation casing milling fishing tool of the present invention;
FIG. 2 is a schematic view of the fluid flow path principle of the screw type local reverse circulation casing milling fishing tool of the present invention;
FIG. 3 is a full cross-sectional view of the flow coupling of the screw local reverse circulation casing milling fishing tool of the present invention;
FIG. 4 is a cross-sectional view of a flow coupling of the screw local reverse circulation casing milling fishing tool of the present invention;
FIG. 5 is a schematic structural view of a screen-type transmission shaft of the screw-type local reverse circulation casing milling fishing tool of the present invention;
FIG. 6 is a schematic structural view of a screw-type local reverse circulation milling fishing tool according to the present invention, wherein a screen pipe transmission shaft is connected with a screw pump to realize rotation transmission;
FIG. 7(a) is a schematic diagram of the grinder of the screw type partial reverse circulation casing milling fishing tool of the present invention;
FIG. 7(b) is a cross-sectional view A-A of FIG. 7 (a);
FIG. 8(a) is a schematic of a magnetic center tube of the screw local reverse circulation casing milling fishing tool of the present invention;
FIG. 8(B) is a cross-sectional view B-B of FIG. 8 (a);
FIG. 9 is a schematic structural view of a centering seal portion of a magnetic center tube of the screw-type local reverse circulation casing milling fishing tool of the present invention;
FIG. 10 is a schematic structural view of the outer barrel of the screw type local reverse circulation casing milling fishing tool of the present invention;
FIG. 11(a) is a schematic structural view of the female cone of the screw-type local reverse circulation casing milling fishing tool of the present invention;
fig. 11(b) is a radial cross-sectional view of fig. 11 (a).
Detailed Description
The invention will be further described with reference to the following figures and specific examples, which are not intended to limit the invention in any way.
As shown in fig. 1 and 2, the screw type local reverse circulation casing milling fishing tool comprises a screw drilling assembly 1, a diversion connector 2, an outer working barrel 6 and a casing milling barrel 7 which are sequentially connected from top to bottom, a screw pump assembly 3 arranged in the diversion connector 2, a grinding machine 4 and a magnetic central pipe 5 arranged in the outer working barrel 6, and a female cone 8 arranged in the casing milling barrel 7; in particular, the amount of the solvent to be used,
the screw drill assembly 1 adopts a commercially available screw drill and comprises an upper joint 1-1, a bypass valve 1-2 and a connecting outer cylinder which are sequentially connected from top to bottom, a screw drill stator 1-3 and a driving head 1-5 are arranged in the connecting outer cylinder from top to bottom, a screw drill rotor 1-4 is assembled in an inner cavity of the screw drill stator 1-3, and the driving head 1-5 is connected to the bottom end of the screw drill rotor 1-4; a two-stage thread buckle used for being connected with the top end of the diversion connector 2 is processed on the inner wall of the bottom end of the connecting outer cylinder;
as shown in fig. 3 and 4, the flow guide joint 2 is composed of a cylindrical body and a sealing gland 2-5; the inner wall of the cylindrical body is provided with a first annular boss, and correspondingly, a second annular boss is formed on the inner wall of the upper part of the first annular boss;
10 flow guide holes 2-1 penetrating to the lower end face of the first annular boss are axially formed in the upper end face of the first annular boss, so that liquid entering a cavity above the second annular boss is guided to the cavity below the second annular boss; the 10 guide holes 2-1 are divided into two guide hole groups and symmetrically distributed on two sides of the first annular boss; the guide holes in each guide hole group are arranged in an equidistant mode, and the aperture is 9 mm; meanwhile, two backflow holes 2-2 penetrating to the outside of the flow guide joint 2 are also obliquely and upwards formed in the inner wall of the first annular boss positioned below the second annular boss, the two backflow holes 2-2 are symmetrically formed in the cylindrical body, and the two backflow holes 2-2 and the two flow guide hole groups are alternately arranged; the aperture of each backflow hole 2-2 is 25mm, and the included angle formed by the axial direction of the backflow hole and the axial direction of the cylinder is 45 degrees; the flow guide hole 2-1 can provide a channel for changing the flow direction for liquid flowing out of the interior of the screw drilling tool, and the backflow hole 2-2 can supply liquid flow to flow upwards in an inclined mode to return to an annular space of the oil sleeve;
the sealing gland 2-5 is covered on the upper end surface of the second annular boss and is fixed on the second annular boss through a plurality of screws arranged along the circumferential direction; a central through hole with the same inner diameter as the second annular boss is axially formed in the sealing gland 2-5, so that a transmission shaft mounting hole 2-3 for inserting a transmission shaft is formed in the middle of the sealing gland and the second annular boss; two first O-shaped sealing rings 2-4 are arranged on the wall of the central through hole of the sealing gland 2-5 at intervals;
a double-stage thread buckle used for being connected with a female buckle at the bottom end of the screw drill is processed on the outer wall of the top end of the flow guide joint 2, so that the top end of the flow guide joint is connected with the bottom end of an extension outer cylinder of the screw drill assembly; the outer wall of the bottom end of the flow guide joint 2 is provided with a two-stage thread buckle used for being connected with the female buckle of the outer working barrel 6, so that the bottom end of the flow guide joint is connected with the top end of the outer working barrel 6.
As shown in fig. 5 and 6, the screw pump assembly 3 includes a screen pipe type transmission shaft, a first universal shaft 3-6, a screw pump rotor 3-4 and a screw pump stator 3-5; in particular, the amount of the solvent to be used,
the sieve tube type transmission shaft consists of an upper cylinder body 3-1 and a lower transmission shaft 3-3; the top of the upper cylinder body 3-1 is provided with an opening, the bottom is closed, and a plurality of first sieve pores 3-2 with the aperture of 10mm are uniformly distributed on the side wall to provide a liquid flow channel; the lower transmission shaft 3-3 is a cylinder, the top end of the lower transmission shaft is fixed at the center of the bottom surface of the upper cylinder 3-1, the lower part of the lower transmission shaft is inserted into the transmission shaft mounting hole 2-3 and forms sealing with the hole wall of the central through hole of the sealing gland 2-5; a single-stage threaded buckle used for being connected with the female buckle of the driving head 1-5 is further arranged on the outer wall of the top end of the upper barrel 3-1;
the top end of the first universal shaft 3-6 is connected with the bottom end of the lower transmission shaft 3-3, and the bottom end is fixed at the top end of the screw pump rotor 3-3; the top end of the screw pump stator 3-5 is in threaded connection with the inner wall of the bottom end of the flow guide joint 2, and the screw pump rotor 3-4 is assembled in the screw pump stator 3-5, so that the universal shaft 3-2 can synchronously rotate along with the sieve tube type transmission shaft 3-1, and the screw pump rotor 3-4 is driven to rotate in the screw pump stator 3-5, and power is transmitted. The power of the screw pump assembly 3 is provided by a screw drill. The screen pipe type transmission shaft not only plays a transmission role, but also plays a key role in converting the flow direction of liquid flow.
As shown in fig. 8(a) and 8(b), the magnetic central pipe 5 comprises an aluminum central pipe 5-7, a first neodymium magnetic strong magnetic fishing block 5-1, a second neodymium magnetic strong magnetic fishing block 5-2, a third neodymium magnetic strong magnetic fishing block 5-3 and a centralizer 5-5; wherein, the top end of the central pipe 5-7 is connected with the outer wall of the bottom end of the screw pump stator 3-5 through threads; the first neodymium magnetic strong magnetic fishing block 5-1 and the third neodymium magnetic strong magnetic fishing block 5-3 are symmetrically arranged on the inner wall of the middle part of the central pipe 5-7, the second neodymium magnetic strong magnetic fishing block 5-2 is arranged on the inner wall of the lower part of the central pipe 5-7, and the neodymium magnetic strong magnetic fishing blocks are fixed on the central pipe 5-7 through countersunk head screws 5-4.
As shown in fig. 9, the centralizer 5-5 is sleeved and fixed on the outer wall of the bottom end of the central tube 5-7, and the size of the centralizer 5-5 is adapted to the inner diameter of the outer working barrel 6, so as to centralize the central tube 5-7; the outer wall of the centralizer 5-5 is provided with a groove for arranging a second O-shaped sealing ring 5-6, so that the outer working barrel 6 and the central tube 5-7 are sealed.
As shown in fig. 10, 16 inclined jet holes 6-1-are uniformly distributed on the side wall of the outer working barrel 6 above the centralizer 5-5 along the circumferential direction; each inclined jet hole 6-1 is a through hole which is obliquely and upwards formed from the outer wall of the working cylinder 6 to be communicated with the inner cavity of the outer working cylinder 6, and the included angle formed by the axial direction of the jet hole and the axial direction of the outer working cylinder 6 is 45 degrees, which is favorable for liquid flow to be jetted and flow to the well bottom in a mode of piercing the well bottom; wherein the outer diameter of the outer working barrel 6 can be processed to be 114-116 mm according to the requirement, and the wall thickness is 6-8 mm.
As shown in fig. 7(a) and 7(b), the grinding mill 4 is disposed inside the top of the center pipe 5-7, which includes a second cardan shaft 4-1, a perforated screen deck 4-2, blades 4-3, and a mounting assembly 4-4; wherein, the top end of the second universal shaft 4-1 is connected with the bottom end of the screw pump rotor 3-4; the porous sieve plate 4-2 is disc-shaped and fixed on the inner wall of the top of the central tube 5-7, and a plurality of second sieve holes 4-3 with the aperture of 3mm are uniformly distributed on the whole disk surface; axial through holes are formed in the centers of the porous sieve plate 4-2 and the blades 4-3; the mounting component 4-4 is composed of a bolt and a nut, the blade 4-3 is sleeved and fixed on the outer side of the inverted bolt, and the top end of the bolt penetrates through an axial through hole of the porous sieve plate 4-2 and is fixed at the bottom end of the second universal shaft 4-1; the nut is arranged on the bolt in a penetrating way and is arranged between the bolt cap and the blade 4-3.
When the screw pump works, ferromagnetic fragments with larger particles are sucked to the bottom surface of the porous sieve plate, are cut and ground by the rotating blade to become fragments with smaller particles, and are sucked into the screw pump and then discharged into an annular space of the oil sleeve; the grinding machine is an important component of the invention, and the grinding machine can effectively reduce the abrasion and influence of large-particle chips on the screw pump.
The sleeve milling barrel 7 consists of a first sleeve milling barrel 7-1 and a second sleeve milling barrel 7-2; the external working barrel 6, the first milling sleeve 7-1, the female cone 8 and the second milling sleeve 7-2 are sequentially in threaded connection;
as shown in fig. 11(a) and 11(b), a third annular boss 8-1 is formed on the inner wall of the middle part of the female cone 8 in a protruding manner, the upper end face and the lower end face of the third annular boss are respectively processed into an upper conical surface and a lower conical surface, and a thread buckle for buckle making is processed on the lower conical surface; in the embodiment, the fishing range of the female cone making is set to be 84-95 mm, so that the space can accommodate an oil pipe body with the diameter of 73mm to pass through, and when an oil pipe coupling with the diameter of 89mm moves upwards to the lower conical surface of the third annular boss 8-1, the making, back-off and fishing work can be completed;
in addition, the inner wall of the female cone 8 is symmetrically provided with a first water passing groove 8-2 and a second water passing groove 8-3 which are communicated up and down, so that when a coupling contacts the inner wall of the female cone, liquid flow can be allowed to continue to pass through; specifically, the first water passing groove 8-2 and the second water passing groove 8-3 are through grooves with semicircular radial sections, and the semicircular radius of the cross sections is 7.5 mm.
The working principle of the screw type local reverse circulation milling fishing tool is as follows:
connecting the screw type local reverse circulation milling fishing tool to the lower end of a drilling tool, starting a pump to circulate after the drilling tool is lowered to a position close to the top of a fish, enabling liquid to flow through an upper joint and enter a bypass valve, and closing the bypass valve when the pressure difference of the bypass valve reaches 0.3MPa and is kept stable so that the liquid flow continuously descends; in the downlink process:
the positive circulating liquid in the oil pipe flows into the screw drilling tool and flows out of a sieve pipe hole of the sieve pipe type transmission shaft, and is guided to flow to the lower part through a guide hole of the guide joint and enter an annular space formed between the outer working barrel and the screw pump stator and between the outer working barrel and the central pipe, so that the positive circulating liquid is obliquely downwards sprayed into an annular space of the oil casing pipe from a spray hole formed in the outer working barrel;
meanwhile, the liquid flow downwards drives the screw drilling tool to rotate, the power is transmitted to a screw pump below through the driving head, the power coefficient of the screw drilling tool is set to be 3 times of that of the screw pump, so that a negative pressure suction effect can be formed inside the tool barrel when the screw pump works, the liquid flow and the fragments which are milled in the sleeve are sucked into the barrel, and the ferromagnetic fragments are sucked and stored in the magnetic center tube; the screw pump works and drives the blades of the grinder to rotate at the same time, so that the non-ferromagnetic large-particle debris is cut and ground by the grinder to become micro debris, and the micro debris is pumped by the screw pump to be discharged to the annular space of the oil sleeve from 2 obliquely upward return liquid controls on the side surface of the flow guide joint and finally returns to the ground;
the effect that female awl and cover mill a section of thick bamboo lies in can overlap earlier and mills the outside space of intraductal junk, overlaps to like the position of coupling, make the knot to it through female awl, through the effect of moment of torsion with the junk back-off, and then realize the cover and mill, salvage once and accomplish, can effectively avoid metal fragment to get into the annular space simultaneously and cause the risk of sticking a drill.
The contents of the present invention are not limited to the above-mentioned embodiments, and those skilled in the art can easily suggest other embodiments according to the technical teaching of the present invention, but such embodiments are included in the scope of the present invention.
Claims (7)
1. A screw type local reverse circulation milling fishing tool is characterized by comprising a screw drilling tool assembly (1), a flow guide joint (2), an outer working cylinder (6), a milling cylinder (7), a screw pump assembly (3) arranged in the flow guide joint (2), a grinding machine (4) and a magnetic central pipe (5) arranged in the outer working cylinder (6), and a female cone (8) arranged in the milling cylinder (7), wherein the screw drilling tool assembly (1), the flow guide joint (2), the outer working cylinder (6) and the milling cylinder (7) are sequentially connected from top to bottom; wherein,
the screw drill assembly (1) comprises an upper joint (1-1), a bypass valve (1-2) and a connecting outer cylinder which are sequentially connected from top to bottom, and a screw drill stator (1-3) and a driving head (1-5) are arranged in the connecting outer cylinder from top to bottom; the top end of a stator (1-3) of the screw drill is connected with the lower port of the bypass valve (1-2), a rotor (1-4) of the screw drill is assembled in the inner cavity of the stator (1-3) of the screw drill, and a driving head (1-5) is fixed at the bottom end of the rotor (1-4) of the screw drill;
the flow guide joint (2) is composed of a cylindrical body and a sealing gland (2-5); the top end of the cylindrical body is connected with the bottom end of the connecting outer cylinder, the bottom end of the cylindrical body is fixed on the inner wall of the top end of the outer working cylinder (6), a first annular boss is arranged on the inner wall of the top end of the outer working cylinder, and a second annular boss is formed on the inner wall of the upper part of the first annular boss; a plurality of flow guide holes (2-1) penetrating through the lower end face of the first annular boss are axially formed in the upper end face of the first annular boss, two backflow holes (2-2) penetrating through the outer part of the flow guide joint (2) are obliquely and upwardly formed in the inner wall of the first annular boss positioned below the second annular boss, a sealing gland (2-5) is covered and fixed on the upper end face of the second annular boss, and a central through hole with the same inner diameter as that of the second annular boss is axially formed in the center of the sealing gland;
the screw pump assembly (3) comprises a sieve tube type transmission shaft, a first universal shaft (3-6), a screw pump rotor (3-4) and a screw pump stator (3-5); the sieve tube type transmission shaft consists of an upper cylinder body (3-1) with an opening at the top and a closed bottom and a lower transmission shaft (3-3) fixed on the bottom surface of the upper cylinder body; the top end of the upper cylinder (3-1) is connected to the driving head (1-5), and a plurality of first sieve pores (3-2) are uniformly distributed on the side wall of the upper cylinder; the lower transmission shaft (3-3) is inserted into the central through hole of the sealing gland (2-5) to form sealing; the top end of the first universal shaft (3-6) is connected with the bottom end of the lower transmission shaft (3-3), and the bottom end of the first universal shaft is fixed at the top end of the screw pump rotor (3-4); the top end of the screw pump stator (3-5) is connected to the inner wall of the bottom end of the flow guide joint (2), and the inner cavity of the screw pump stator is provided with a screw pump rotor (3-4);
the magnetic central pipe (5) comprises an aluminum central pipe (5-7), a plurality of first neodymium magnetic strong magnetic fishing blocks and a centralizer (5-5); the top end of the central pipe (5-7) is connected with the bottom end of the screw pump stator (3-5); a plurality of neodymium magnetic strong magnetic fishing blocks are uniformly distributed and fixed on the inner wall of the central pipe (5-7) along the circumferential direction, and the centralizer (5-5) is fixed on the outer wall of the bottom end of the central pipe (5-7) and forms a seal with the outer working barrel (6); the grinder (4) is arranged on the inner side of the top of the central pipe (5-7), is linked with the screw pump rotor (3-4) and drives the inner blade thereof to rotate and cut; a plurality of inclined jet holes are arranged on the side wall of the outer working barrel (6) above the centralizer (5-5) along the circumferential direction.
2. The screw type local reverse circulation casing milling fishing tool according to claim 1, wherein the plurality of guide holes (2-1) are divided into two guide hole groups and symmetrically arranged on two sides of the first annular boss; the guide holes in each guide hole group are arranged in an equidistant mode; meanwhile, the two return flow holes (2-2) are symmetrically arranged on the cylindrical body, and the two return flow holes (2-2) and the two flow guide hole groups are alternately arranged; the included angle formed by the axial direction of the backflow hole (2-2) and the axial direction of the cylinder body is 45 degrees.
3. The screw type local reverse circulation casing milling fishing tool according to claim 1, characterized in that the aperture of the first screen hole (3-2) is 10 mm; the aperture of the second sieve hole (4-3) is 3 mm.
4. The screw type partial reverse circulation casing milling fishing tool according to claim 1, characterized in that the grinding mill (4) comprises a second cardan shaft 4-1, a perforated screen plate (4-2), blades (4-3) and a mounting assembly (4-4); the top end of the second universal shaft (4-1) is connected with the bottom end of the screw pump rotor (3-4); the porous sieve plate (4-2) is fixed on the inner wall of the central pipe (5-7), and a plurality of second sieve holes (4-3) are uniformly distributed on the disc surface of the sieve plate; the mounting assembly (4-4) is composed of a bolt and a nut, the blade (4-3) is sleeved and fixed on the outer side of the inverted bolt, and the top end of the bolt penetrates through a central hole of the porous sieve plate (4-2) and is fixed at the bottom end of the second universal shaft (4-1); the nut is arranged on the bolt in a penetrating way and is arranged between the bolt cap and the blade (4-3).
5. The screw type local reverse circulation milling fishing tool according to claim 1, wherein a third annular boss (8-1) is convexly formed on the inner wall of the middle part of the female cone (8), the upper end surface and the lower end surface of the third annular boss are respectively processed into an upper conical surface and a lower conical surface, and a thread buckle for making a buckle is processed on the lower conical surface; two water passing grooves which are communicated up and down are symmetrically arranged on the inner wall of the female cone (8).
6. The screw type local reverse circulation casing milling fishing tool of claim 1, wherein the water passing groove is a through groove with a radial section in a semicircular shape, and the radius of the semicircular section is 7.5 mm.
7. The screw type local reverse circulation casing milling fishing tool according to claim 1, characterized in that the axial direction of the injection holes formed in the side wall of the outer working barrel (6) forms an angle of 45 ° with the axial direction of the outer working barrel (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011071287.9A CN112502656B (en) | 2020-10-09 | 2020-10-09 | Screw type local reverse circulation milling fishing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011071287.9A CN112502656B (en) | 2020-10-09 | 2020-10-09 | Screw type local reverse circulation milling fishing tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112502656A true CN112502656A (en) | 2021-03-16 |
| CN112502656B CN112502656B (en) | 2022-03-11 |
Family
ID=74954077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011071287.9A Active CN112502656B (en) | 2020-10-09 | 2020-10-09 | Screw type local reverse circulation milling fishing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112502656B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB753458A (en) * | 1952-12-19 | 1956-07-25 | David John Frederick Burns | Improvements in magnetic fishing tools for bore holes |
| CN1704558A (en) * | 2004-06-01 | 2005-12-07 | 周德育 | Down-hole drill string speed-changing transmission joint |
| CN103967439A (en) * | 2014-04-28 | 2014-08-06 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Continuous milling and salvage integrated tool and milling and salvage method thereof |
| CN203978355U (en) * | 2014-08-13 | 2014-12-03 | 中国石油集团渤海钻探工程有限公司 | Multi-functional local reverse-circulation seating nipple |
| CN206071508U (en) * | 2016-08-25 | 2017-04-05 | 宋明远 | A kind of waterpower screw rod self-loopa sand-bailing equipment |
| CN206280027U (en) * | 2016-12-08 | 2017-06-27 | 新疆华油油气工程有限公司 | Reacting cycle is forced to drag for sand instrument |
| CN109653697A (en) * | 2017-10-11 | 2019-04-19 | 中国石油化工股份有限公司 | Oil pipe hydraulic cuts fishing tool |
| CN209212193U (en) * | 2018-11-18 | 2019-08-06 | 牡丹江市林海石油打捞工具有限公司 | A kind of strong magnetic and reacting cycle combined type mince fisher |
| CN110685628A (en) * | 2019-10-10 | 2020-01-14 | 大庆石油管理局有限公司 | Local reverse circulation fishing basket with milling function |
| CN210918953U (en) * | 2019-11-08 | 2020-07-03 | 中国石油集团渤海钻探工程有限公司 | Composite local reverse circulation sleeve milling barrel |
-
2020
- 2020-10-09 CN CN202011071287.9A patent/CN112502656B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB753458A (en) * | 1952-12-19 | 1956-07-25 | David John Frederick Burns | Improvements in magnetic fishing tools for bore holes |
| CN1704558A (en) * | 2004-06-01 | 2005-12-07 | 周德育 | Down-hole drill string speed-changing transmission joint |
| CN103967439A (en) * | 2014-04-28 | 2014-08-06 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Continuous milling and salvage integrated tool and milling and salvage method thereof |
| CN203978355U (en) * | 2014-08-13 | 2014-12-03 | 中国石油集团渤海钻探工程有限公司 | Multi-functional local reverse-circulation seating nipple |
| CN206071508U (en) * | 2016-08-25 | 2017-04-05 | 宋明远 | A kind of waterpower screw rod self-loopa sand-bailing equipment |
| CN206280027U (en) * | 2016-12-08 | 2017-06-27 | 新疆华油油气工程有限公司 | Reacting cycle is forced to drag for sand instrument |
| CN109653697A (en) * | 2017-10-11 | 2019-04-19 | 中国石油化工股份有限公司 | Oil pipe hydraulic cuts fishing tool |
| CN209212193U (en) * | 2018-11-18 | 2019-08-06 | 牡丹江市林海石油打捞工具有限公司 | A kind of strong magnetic and reacting cycle combined type mince fisher |
| CN110685628A (en) * | 2019-10-10 | 2020-01-14 | 大庆石油管理局有限公司 | Local reverse circulation fishing basket with milling function |
| CN210918953U (en) * | 2019-11-08 | 2020-07-03 | 中国石油集团渤海钻探工程有限公司 | Composite local reverse circulation sleeve milling barrel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112502656B (en) | 2022-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111577163B (en) | Double-reverse-circulation continuous deslagging drilling tool | |
| WO2003058023A1 (en) | A power transmission unit of an impactor, a hydraulic jet impactor and the application thereof | |
| CN106930710A (en) | Counterflush drilling method | |
| CN204691658U (en) | rotary drilling rig down-hole hammer construction special working device | |
| WO2008138226A1 (en) | Screw energy converter | |
| CN112502656B (en) | Screw type local reverse circulation milling fishing tool | |
| CN211974915U (en) | Circulating rotational flow washing tool in large-inclination oil well | |
| CN112065313B (en) | Turbine negative pressure type local reverse circulation grinding and milling fishing tool | |
| CN104727744A (en) | Working device special for construction of dive-hole hammer of rotary drilling jig | |
| CN210105816U (en) | Reverse circulation drilling downhole plugging diverter | |
| CN215520825U (en) | Hydraulic turbine driven milling casing tool | |
| CN110206482A (en) | A kind of coal-bed gas exploitation drilling equipment | |
| CN212774193U (en) | Slag discharge device for reverse circulation drilling | |
| CN108266140A (en) | Suction type vortex well flushing device | |
| CN104019030A (en) | Discharging device of reverse-circulating liquid-driving oil extraction screw pump | |
| CN211500538U (en) | Hole reaming tool along with position | |
| CN111691840A (en) | Side deslagging device for large-diameter reverse circulation drilling | |
| CN106368630A (en) | Method and special tool for sand flushing | |
| CN207453909U (en) | Pipe cleaning well-flushing short-circuit cycle valve | |
| CN101975037A (en) | Method and device for conversing direct and reverse circulations of workover fluid in oil well | |
| CN202560181U (en) | Pipe-column sand setting device | |
| CN217582060U (en) | Metal debris cleaning device for blowout preventer | |
| CN113790025B (en) | Double-runner particle jet flow auxiliary drill bit rotary drilling and milling tool | |
| CN218177161U (en) | Reverse circulation mud joint for drilling facility | |
| CN221032461U (en) | Positive circulation rotary joint for reverse circulation drilling machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |