CN211370335U - Integrated tool for milling and fishing and pipe column system - Google Patents
Integrated tool for milling and fishing and pipe column system Download PDFInfo
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- CN211370335U CN211370335U CN201921809627.6U CN201921809627U CN211370335U CN 211370335 U CN211370335 U CN 211370335U CN 201921809627 U CN201921809627 U CN 201921809627U CN 211370335 U CN211370335 U CN 211370335U
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Abstract
The utility model relates to a milling and fishing integrated tool and a tubular column system, belonging to the technical field of underground fishing tools, wherein the milling and fishing integrated tool comprises a milling mechanism and a fishing mechanism; the sleeve milling mechanism comprises a sleeve milling barrel, a connector arranged at the upper end part of the sleeve milling barrel and a sleeve milling head arranged at the lower end part of the sleeve milling barrel; the salvaging mechanism is fixedly connected with the inner wall of the milling sleeve through a retaining structure, when the retaining structure fails, the milling sleeve can move relative to the salvaging mechanism, and a stopping structure for stopping the salvaging mechanism from separating from the milling sleeve is arranged on the inner wall of the milling sleeve. The utility model discloses a relative displacement can take place for milling mechanism and salvage mechanism under the cover mills integration instrument, meets with the fish contact in advance at salvage mechanism and hinders under the condition, and milling mechanism can continue to move and mill the annular space foreign matter around the fish until the cover mills and target in place, and the cover mills and target in place and just can successfully salvage out the fish under the less condition of resistance after for.
Description
Technical Field
The utility model belongs to the technical field of fishing tool in the pit, concretely relates to cover mills integration instrument of salvaging and tubular column system.
Background
In the process of oil exploitation, a well is drilled to a target layer, and then a casing pipe is put to form a shaft. When in production, after production pipe columns such as oil pipes are put into the shaft, an oil sleeve annulus is formed between the production pipe columns and the inner wall of the sleeve of the shaft. In the production process, sand particles discharged from the stratum, and impurities such as rust and scale skin generated by corrosion and scaling of oil/casing fall into the oil casing annulus and are gradually deposited, so that the pipe column is buried; when the squeeze plugging operation is carried out, redundant squeeze plugging cement is not returned in time to be deposited in the annular space, and the tubular column is buried.
The conventional method for treating the pipe column blockage accident caused by the deposition of the annular foreign matters comprises the following steps: the annular space is cleared up to the first casing milling tool, then the casing milling pipe column is taken out, then the fishing tool is put in to carry out unfreezing fishing, the operation method can achieve the effect of handling accidents, but the construction efficiency is not high, and after the annular space blockage is relieved by the casing milling, the fish can directly fall to the well bottom to deform, and the difficulty of secondary fishing is increased.
Some current shell mills salvage integrated tool, unites two into one these two kinds of functions, and common way is to mill a back end processing pin cone, female awl or mill a section of thick bamboo inside setting fishing spear etc. at the shell, and the shell mills and realizes salvaging behind the target position. However, the positions of the fishing mechanism and the sleeve milling head of the tool are relatively fixed, the situation that the sleeve milling barrel is not in place in a sleeve milling mode but the fishing mechanism is in contact with the falling fish in advance to be blocked can occur, the sleeve milling barrel cannot continue to conduct sleeve milling, annular foreign bodies around the falling fish cannot be cleaned due to the fact that the sleeve milling is not in place, the falling fish can be blocked by the annular foreign bodies when being fished, resistance of the fishing mechanism when fishing the falling fish is large, and finally fishing failure can be caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cover mills integration instrument of salvaging to solve the cover among the prior art and mill the salvaging instrument because of salvaging the mechanism in advance with the fish contact meet hinder lead to the cover mill the section of thick bamboo cover mill not in place the problem, still provide a cover mill integration tubular column system of salvaging, in order to solve the cover among the prior art and mill integration tubular column system because of salvaging the mechanism in advance with the fish contact meet hinder lead to the cover mill the section of thick bamboo cover mill not in place the problem.
In order to achieve the above object, the utility model discloses an integrated instrument is salvaged in shell milling adopts following technical scheme:
scheme 1: a milling and fishing integrated tool comprises a milling mechanism and a fishing mechanism; the sleeve milling mechanism comprises a sleeve milling barrel, a connector arranged at the upper end part of the sleeve milling barrel and a sleeve milling head arranged at the lower end part of the sleeve milling barrel; the salvaging mechanism is fixedly connected with the inner wall of the milling sleeve through a retaining structure, the retaining structure fails when the milling mechanism bears downward acting force relative to the salvaging mechanism and the acting force is greater than a set value, the milling mechanism moves relative to the salvaging mechanism, and a stopping structure for stopping the salvaging mechanism from being separated from the milling sleeve is arranged on the inner wall of the milling sleeve.
The utility model has the advantages that: when construction is carried out, the integrated milling and fishing tool connected to the tail end of the fishing pipe column is lowered into the top of a fish in a well, the downward movement is continued, the milling head can clean annular foreign matters around the fish in the process of the downward movement, when the fishing mechanism is blocked and catches the fish, the fishing pipe column is tried to be lifted, and if the fishing pipe column can be lifted and the resistance is smaller during the lifting, the fish can be directly fished out; if the fishing pipe column cannot be lifted, the fact that the milling mechanism possibly does not mill the fishing pipe column in place and annular foreign matters around the fish are not cleaned up is shown, pressure is applied to the fishing pipe column, when the pressure is larger than a set value of the retaining structure, the retaining structure fails, the milling mechanism moves relative to the fishing mechanism, the fixed connection relation between the milling mechanism and the fishing pipe column is released, the milling mechanism can continuously move downwards to mill the annular foreign matters around the fish, the fish can be successfully fished out under the condition of small resistance after the milling pipe column is in place, and the fishing mechanism can be prevented from being separated from the milling barrel due to the stopping structure. Because the utility model discloses the cover among the integrated instrument is salvaged in the cover mills mechanism and salvage mechanism and can take place relative movement after overcoming the holding power of retaining structure, consequently can not appear because of salvage mechanism is obstructed lead to the cover mill the unable continuation cover of mechanism and then lead to the problem that the cover mills not in place.
Scheme 2: on the basis of the scheme 1, the holding structure is a shear pin for connecting the fishing mechanism and the milling barrel.
The beneficial effects are that: the shear pin has simple structure and lower cost, and can fix the milling mechanism and the fishing mechanism together conveniently.
Scheme 3: on the basis of the scheme 1, the fishing mechanism comprises a righting body and a fishing head fixedly connected with the righting body, the outer peripheral surface of the righting body is matched with the inner wall of the milling sleeve, and the righting body can freely slide in the milling sleeve after the structure fails.
The beneficial effects are that: the outer peripheral surface of the centralizing body is matched with the inner cavity of the milling sleeve, so that the milling sleeve and the centralizing body can be constrained mutually, the milling mechanism and the fishing mechanism cannot swing at a large angle, and the operation can be carried out according to a preset direction.
Scheme 4: on the basis of the scheme 2, the fishing mechanism comprises a righting body and a fishing head fixedly connected with the righting body, the outer peripheral surface of the righting body is matched with the inner wall of the milling sleeve, a shear pin is connected with the inner wall of the milling sleeve and the righting body in a connecting mode, and the righting body can freely slide in the milling sleeve after the shear pin is sheared.
The beneficial effects are that: the position of the fishing mechanism connected with the shear pin is selected on the centralizing body because the centralizing body has a longer integral structure and enough regions on the peripheral surface of the centralizing body can be selected, so that the fishing mechanism is convenient to install.
Scheme 5: on the basis of scheme 4, the righting body is cylindrical, and a through-flow hole is formed in the righting body.
The beneficial effects are that: the columnar centralizing body is high in structural strength, the through-flow holes are formed to facilitate flowing of workover fluid, and meanwhile, the workover fluid can conveniently carry chips generated by sleeve milling out of the ground.
Scheme 6: on the basis of any one of the technical schemes 3 to 5, a stop table is arranged between the righting body and the fishing head and is used for contacting with the top of the falling fish to limit the position of the fishing mechanism.
The beneficial effects are that: in the process of transferring fishing tools, when only the position platform contacts with the top of a fish and can't further transfer, the insertion of a fishing head is limited, simultaneously when the sleeve milling mechanism is moved relative to the fishing mechanism for further sleeve milling as required, through exerting pressure on a fishing pipe column, the position platform is stopped by the top of the fish, the top of the fish can provide the action force of the retaining force for overcoming the retaining structure for the sleeve milling fishing tool through the position platform, meanwhile, the borehole operator can judge the depth of the fishing head entering the fish according to the tail end of the fishing head and the distance between the position platforms, and the borehole operator can be controlled to better perform sleeve milling operation conveniently.
Scheme 7: on the basis of the scheme 6, the stop table is of a convex ring structure, an overflowing hole is formed in the stop table, and the peripheral surface of the stop table is in contact with the inner wall of the sleeve milling barrel.
The beneficial effects are that: the structural strength of the convex ring structure is higher, the convex ring structure is not easy to damage due to stress, the overflowing holes are formed so as to facilitate the flowing of the workover fluid, and meanwhile, the workover fluid can conveniently carry the chips generated by the sleeve milling out of the ground.
Scheme 8: on the basis of any one of the technical schemes 1 to 5, the stopping structure is a step structure.
The beneficial effects are that: the step structure is simple in structure, convenient to machine and reliable in stopping.
Scheme 9: on the basis of the scheme 6, the stop table and part of the fishing head are positioned in the milling sleeve.
The beneficial effects are that: the stop table and part of the fishing heads are positioned in the milling sleeve, and when the milling sleeve fishing tool is put from top to bottom on the ground and enters the underground, the milling sleeve can protect the stop table and the fishing heads to a certain degree, so that the damage to the stop table and the fishing heads caused by factors such as collision is reduced.
Scheme 10: on the basis of the scheme 3, the fishing head comprises:
the cone column body comprises one or more than two cone sections which are thin at the top and thick at the bottom and can be detachably connected with the lower end of the righting body;
the spiral slips are provided with split grooves extending from bottom to top and can be radially expanded and contracted, the spiral slips are sleeved on the conical cylinder body from top to bottom, the inner surface of the spiral slips is matched with the outer surface of each stage of conical section, and the spiral slips can be driven by each stage of conical section to radially contract or expand when the conical cylinder body moves up and down relative to the spiral slips;
the outer surface of the spiral slip is provided with a left-handed spiral, the spiral slip is in circumferential upper rotation fit with the conical cylinder body, and the spiral slip can exit from the inner cavity of the fish when the fishing pipe column rotates rightwards.
The beneficial effects are that: when the fishing structure is lowered into the inner cavity of the fish, the spiral slips can be in contact with the inner wall of the fish, friction is generated between the spiral slips and the inner wall of the fish, when the fishing pipe column is lifted, the righting body can drive the conical cylinder to move upwards, the spiral slips have friction due to contact with the inner wall of the fish, the spiral slips are not moved, and the conical cylinder is provided with a conical section which is thin at the top and thick at the bottom, the inner wall of the spiral slips can be subjected to axial component force of the conical cylinder, so that the spiral slips can expand outwards, the spiral slips are closer to the inner cavity of the fish, the friction force between the spiral slips and the inner cavity of the fish is larger, the fishing mechanism can capture the fish, and finally the fishing pipe column is continuously lifted; if the fish can not be fished out, the spiral slips can retreat from the inner cavity of the fish through the left-hand spiral on the outer surface of the spiral slips through the right-hand fishing pipe column. The setting mode can reliably capture the fish and salvage the fish, and the milling and salvage integrated tool can conveniently withdraw from the inner cavity of the fish when the salvage fails, so that the milling and salvage integrated tool cannot fall into the well due to the fact that the milling and salvage integrated tool cannot withdraw.
Scheme 11: on the basis of the scheme 10, the spiral slips are matched with the conical cylinder body through key grooves to achieve rotation stopping matching.
The beneficial effects are that: the key slot is simple in matching, and convenient to design and process.
Scheme 12: on the basis of scheme 11, be equipped with the key piece on the awl cylinder, be equipped with the keyway with key piece adaptation on the spiral slips, and the keyway is linked together with the split groove to make when the spiral slips from the top down overlaps on the awl cylinder, the key piece can get into in the keyway.
The beneficial effects are that: the key block is arranged on the key block to be more conveniently processed, and the key groove is communicated with the splitting groove, so that the key groove can be expanded outwards from the splitting groove, and the key block can easily enter the key groove when the spiral slip is sleeved on the conical cylinder from top to bottom.
Scheme 13: on the basis of any one of the technical schemes 10 to 12, the lower end of the conical cylinder is connected with a guide head, the guide head is provided with an inner cavity, an annular space is formed between the outer wall of the conical cylinder and the inner cavity of the guide head, and the lower end of the spiral slip penetrates into the annular space.
The beneficial effects are that: in the deep annular space of spiral slips, can make the below entrance of the cavity of spiral slips seal, can enough avoid in the foreign matter and then the clearance between spiral slips and the awl cylinder, can avoid spiral slips bottom to be collided with, damaged again.
In order to achieve the purpose, the utility model discloses a casing mills integration tubular column system of salvaging adopts following technical scheme:
scheme 1: a sleeve milling and salvaging integrated pipe column system comprises a salvaging pipe column and a sleeve milling and salvaging integrated tool fixed at the bottom of the salvaging pipe column, wherein the sleeve milling and salvaging integrated tool can sleeve a milling mechanism and a salvaging mechanism; the sleeve milling mechanism comprises a sleeve milling barrel, a connector arranged at the upper end part of the sleeve milling barrel and a sleeve milling head arranged at the lower end part of the sleeve milling barrel; the salvaging mechanism is fixedly connected with the inner wall of the milling sleeve through a retaining structure, the retaining structure fails when the milling mechanism bears downward acting force relative to the salvaging mechanism and the acting force is greater than a set value, the milling mechanism moves relative to the salvaging mechanism, and a stopping structure for stopping the salvaging mechanism from being separated from the milling sleeve is arranged on the inner wall of the milling sleeve.
The utility model has the advantages that: when construction is carried out, the integrated pipe column system for milling and fishing is put into a well, the fishing mechanism is lowered to the top of a fish and goes down continuously, annular foreign matters around the fish can be cleaned by the milling head in the process, when the fishing mechanism is blocked and catches the fish, the fishing pipe column is tried to be lifted, and if the fishing pipe column can be lifted and the resistance is smaller during lifting, the fish can be directly fished out; if the fishing pipe column cannot be lifted, the fact that the milling mechanism possibly does not mill the fishing pipe column in place and annular foreign matters around the fish are not cleaned up is shown, pressure is applied to the fishing pipe column, when the pressure is larger than a set value of the retaining structure, the retaining structure fails, the milling mechanism moves relative to the fishing mechanism, the fixed connection relation between the milling mechanism and the fishing pipe column is released, the milling mechanism can continuously move downwards to mill the annular foreign matters around the fish, the fish can be successfully fished out under the condition of small resistance after the milling pipe column is in place, and the fishing mechanism can be prevented from being separated from the milling barrel due to the stopping structure. Because the utility model discloses the casing mills mechanism and salvage mechanism among the integrated tubular column system of salvaging the casing and mills and can take place relative movement after overcoming retaining structure's holding power, consequently can not appear because of salvaging the mechanism and be obstructed and lead to the unable continuation casing of casing milling mechanism to mill and then lead to the not problem in place of casing milling.
Scheme 2: on the basis of the scheme 1, the holding structure is a shear pin for connecting the fishing mechanism and the milling barrel.
The beneficial effects are that: the shear pin has simple structure and lower cost, and can fix the milling mechanism and the fishing mechanism together conveniently.
Scheme 3: on the basis of the scheme 1, the fishing mechanism comprises a righting body and a fishing head fixedly connected with the righting body, the outer peripheral surface of the righting body is matched with the inner wall of the milling sleeve, and the righting body can freely slide in the milling sleeve after the structure fails.
The beneficial effects are that: the outer peripheral surface of the centralizing body is matched with the inner cavity of the milling sleeve, so that the milling sleeve and the centralizing body can be constrained mutually, the milling mechanism and the fishing mechanism cannot swing at a large angle, and the operation can be carried out according to a preset direction.
Scheme 4: on the basis of the scheme 2, the fishing mechanism comprises a righting body and a fishing head fixedly connected with the righting body, the outer peripheral surface of the righting body is matched with the inner wall of the milling sleeve, a shear pin is connected with the inner wall of the milling sleeve and the righting body in a connecting mode, and the righting body can freely slide in the milling sleeve after the shear pin is sheared.
The beneficial effects are that: the position of the fishing mechanism connected with the shear pin is selected on the centralizing body because the centralizing body has a longer integral structure and enough regions on the peripheral surface of the centralizing body can be selected, so that the fishing mechanism is convenient to install.
Scheme 5: on the basis of scheme 4, the righting body is cylindrical, and a through-flow hole is formed in the righting body.
The beneficial effects are that: the columnar centralizing body is high in structural strength, the through-flow holes are formed to facilitate flowing of workover fluid, and meanwhile, the workover fluid can conveniently carry chips generated by sleeve milling out of the ground.
Scheme 6: on the basis of any one of the technical schemes 3 to 5, a stop table is arranged between the righting body and the fishing head and is used for contacting with the top of the falling fish to limit the position of the fishing mechanism.
The beneficial effects are that: in the process of transferring fishing tools, when only the position platform contacts with the top of a fish and can't further transfer, the insertion of a fishing head is limited, simultaneously when the sleeve milling mechanism is moved relative to the fishing mechanism for further sleeve milling as required, through exerting pressure on a fishing pipe column, the position platform is stopped by the top of the fish, the top of the fish can provide the action force of the retaining force for overcoming the retaining structure for the sleeve milling fishing tool through the position platform, meanwhile, the borehole operator can judge the depth of the fishing head entering the fish according to the tail end of the fishing head and the distance between the position platforms, and the borehole operator can be controlled to better perform sleeve milling operation conveniently.
Scheme 7: on the basis of the scheme 6, the stop table is of a convex ring structure, an overflowing hole is formed in the stop table, and the peripheral surface of the stop table is in contact with the inner wall of the sleeve milling barrel.
The beneficial effects are that: the structural strength of the convex ring structure is higher, the convex ring structure is not easy to damage due to stress, the overflowing holes are formed so as to facilitate the flowing of the workover fluid, and meanwhile, the workover fluid can conveniently carry the chips generated by the sleeve milling out of the ground.
Scheme 8: on the basis of any one of the technical schemes 1 to 5, the stopping structure is a step structure.
The beneficial effects are that: the step structure is simple in structure, convenient to machine and reliable in stopping.
Scheme 9: on the basis of the scheme 6, the stop table and part of the fishing head are positioned in the milling sleeve.
The beneficial effects are that: the stop table and part of the fishing heads are positioned in the milling sleeve, and when the milling sleeve fishing tool is put from top to bottom on the ground and enters the underground, the milling sleeve can protect the stop table and the fishing heads to a certain degree, so that the damage to the stop table and the fishing heads caused by factors such as collision is reduced.
Scheme 10: on the basis of the scheme 3, the fishing head comprises:
the cone column body comprises one or more than two cone sections which are thin at the top and thick at the bottom and can be detachably connected with the lower end of the righting body;
the spiral slips are provided with split grooves extending from bottom to top and can be radially expanded and contracted, the spiral slips are sleeved on the conical cylinder body from top to bottom, the inner surface of the spiral slips is matched with the outer surface of each stage of conical section, and the spiral slips can be driven by each stage of conical section to radially contract or expand when the conical cylinder body moves up and down relative to the spiral slips;
the outer surface of the spiral slip is provided with a left-handed spiral, the spiral slip is in circumferential upper rotation fit with the conical cylinder body, and the spiral slip can exit from the inner cavity of the fish when the fishing pipe column rotates rightwards.
The beneficial effects are that: when the fishing structure is lowered into the inner cavity of the fish, the spiral slips can be in contact with the inner wall of the fish, friction is generated between the spiral slips and the inner wall of the fish, when the fishing pipe column is lifted, the righting body can drive the conical cylinder to move upwards, the spiral slips have friction due to contact with the inner wall of the fish, the spiral slips are not moved, and the conical cylinder is provided with a conical section which is thin at the top and thick at the bottom, the inner wall of the spiral slips can be subjected to axial component force of the conical cylinder, so that the spiral slips can expand outwards, the spiral slips are closer to the inner cavity of the fish, the friction force between the spiral slips and the inner cavity of the fish is larger, the fishing mechanism can capture the fish, and finally the fishing pipe column is continuously lifted; if the fish can not be fished out, the spiral slips can retreat from the inner cavity of the fish through the left-hand spiral on the outer surface of the spiral slips through the right-hand fishing pipe column. The setting mode can reliably capture the fish and salvage the fish, and the milling and salvage integrated tool can conveniently withdraw from the inner cavity of the fish when the salvage fails, so that the milling and salvage integrated tool cannot fall into the well due to the fact that the milling and salvage integrated tool cannot withdraw.
Scheme 11: on the basis of the scheme 10, the spiral slips are matched with the conical cylinder body through key grooves to achieve rotation stopping matching.
The beneficial effects are that: the key slot is simple in matching, and convenient to design and process.
Scheme 12: on the basis of scheme 11, be equipped with the key piece on the awl cylinder, be equipped with the keyway with key piece adaptation on the spiral slips, and the keyway is linked together with the split groove to make when the spiral slips from the top down overlaps on the awl cylinder, the key piece can get into in the keyway.
The beneficial effects are that: the key block is arranged on the key block to be more conveniently processed, and the key groove is communicated with the splitting groove, so that the key groove can be expanded outwards from the splitting groove, and the key block can easily enter the key groove when the spiral slip is sleeved on the conical cylinder from top to bottom.
Scheme 13: on the basis of any one of the technical schemes 10 to 12, the lower end of the conical cylinder is connected with a guide head, the guide head is provided with an inner cavity, an annular space is formed between the outer wall of the conical cylinder and the inner cavity of the guide head, and the lower end of the spiral slip penetrates into the annular space.
The beneficial effects are that: in the deep annular space of spiral slips, can make the below entrance of the cavity of spiral slips seal, can enough avoid in the foreign matter and then the clearance between spiral slips and the awl cylinder, can avoid spiral slips bottom to be collided with, damaged again.
Drawings
Fig. 1 is a schematic structural view of an embodiment 1 of the milling and fishing integrated tool of the present invention;
fig. 2 is a schematic structural view of a milling mechanism in embodiment 1 of the milling and fishing integrated tool of the present invention;
FIG. 3 is a schematic structural diagram of a fishing mechanism of the milling and fishing integrated tool in FIG. 1;
FIG. 4 is an expanded view of the screw slips of the fishing mechanism of FIG. 3;
FIG. 5 is a schematic cross-sectional view A-A of FIG. 3;
fig. 6 is a schematic cross-sectional view of the centralizing body of embodiment 2 of the integrated milling and fishing tool of the present invention;
in the drawings:
1-a connector; 2, sleeving and milling a cylinder; 3-sleeving a milling head; 4-body righting; 5-fishing the head; 6-cutting nails; 7-a through-flow hole; 8-saw-shaped steps; 81-saw-shaped hanging table; 9-a stop table; 10-an overflow hole; 11-a conical cylinder; 12-a cone section; 13-a key block; 14-a spiral slip; 15-key groove; 16-a groove splitting; 17-left-handed helix; 18-a guide head; 19-righting the body boss; 20-circular arc surface.
Detailed Description
The embodiments of the milling and fishing integrated tool of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some, but not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The utility model discloses an embodiment 1 of shell milling salvage integration instrument, as shown in fig. 1, including shell milling mechanism, salvage mechanism and retaining structure, as shown in fig. 2, shell milling mechanism includes connector 1, shell milling section of thick bamboo 2 and shell milling head 3, connector 1 sets up the upper end at shell milling section of thick bamboo 2, be used for being connected with the bottom of salvaging the tubular column, shell milling head 3 is installed in the lower tip department of shell milling section of thick bamboo 2, be used for clearing up the annular space foreign matter around the fish, salvage mechanism and shell milling section of thick bamboo 2 are through retaining structure fixed connection, when the relative salvage mechanism of shell milling mechanism receives decurrent effort and effort is greater than the setting value, the retaining structure inefficacy, the relative salvage mechanism of shell milling mechanism removes, in this embodiment, the retaining structure specifically is shear pin 6, the maximum shear force that shear pin 6 can bear is the.
The upper end of salvaging mechanism is cylindric righting body 4, the lower extreme of righting body 4 is provided with salvage head 5, the inner wall of righting body 4 and the milling barrel 2 of salvaging mechanism passes through shear pin 6 fixed connection, the external diameter of righting body 4 slightly is less than the internal diameter of milling barrel 2, shear pin 6 cuts off the back, righting body 4 can freely slide in milling barrel 2 is inside, still be provided with axially distributed's through-flow hole 7 on righting body 4, through-flow hole 7 is used for the workover fluid circulation when constructing to pass through, the piece that can also make things convenient for workover fluid to hand the bushing to mill the production simultaneously carries out ground. A stop platform 9 is arranged between the righting body 4 and the fishing head 5, and the stop platform 9 is of a convex ring structure and is used for contacting with the top of the falling fish to limit the position of the fishing mechanism. Before the shear pin is cut off, the stop table 9 and part of the fishing head 5 are positioned in the milling sleeve 2, the peripheral surface of the stop table 9 is in contact with the inner wall of the milling sleeve 2, and when the milling and fishing integrated tool is put from the ground to enter the underground, the milling sleeve 2 can protect the stop table 9 and the fishing head 5 to a certain degree, so that the damage to the stop table 9 and the fishing head 2 caused by factors such as collision is reduced. The stop table 9 is provided with an overflowing hole 10, and the function of the overflowing hole 10 on the stop table 9 is the same as that of the overflowing hole 7 on the centralizing body 4, and the details are not repeated.
In the process of lowering the fishing tool, when the stop table 9 is contacted with the top of a fish to be further lowered, the fishing head 5 is limited in movement at the moment, when the milling mechanism is required to move relative to the fishing mechanism for further milling, the operating personnel exert pressure on the fishing pipe column on the ground, and the stop table 9 is blocked by the top of the fish, so that the top of the fish can provide acting force for cutting off the shear pin 6 for the milling and fishing integrated tool through the stop table 9, and meanwhile, the above-well operating personnel can judge the depth of the fishing head 5 entering the fish according to the distance between the tail end of the fishing head 5 and the stop table 9, and can conveniently control the underground operation condition to better perform milling operation.
A stop structure is arranged on the inner wall of the milling sleeve 2, and the stop structure is a saw-shaped step 8. The lower end face of the centralizing body 4 is provided with a saw-shaped hanging table 81, and saw teeth of the saw-shaped step 8 and the saw-shaped hanging table 81 are processed in a matching way and can transmit torque. The saw-shaped hanging table 81 of the righting body 4 of the salvaging mechanism can be mutually blocked with the saw-shaped step 8 after the shear pin 6 is sheared off, so that the salvaging mechanism is prevented from being separated from the milling sleeve 2.
As shown in fig. 1 and 3, the fishing head 5 includes a conical column body 11 detachably connected to the lower end of the centralizing body 4 by screw threads, the conical column body 11 has multiple levels of conical sections 12 which are thin at the upper part and thick at the lower part, it should be noted that, in fig. 1 and 3, the direction of the section lines of the centralizing body 4 and the conical column body 11 is the same, but this does not mean that the centralizing body 4 and the conical column body 11 are in one structure, the section lines of the centralizing body 4 and the conical column body 11 have been drawn, which means that the centralizing body 4 and the conical column body 11 are in two separate structures, and the centralizing body 4 and the conical column body 11 are detachably. Two key blocks 13 symmetrically distributed along the axis of the conical column body 11 are further arranged on the outer surface of the conical column body 11, the key blocks 13 are vertically arranged on the outer surface of the conical column body 11, and two ends of each key block are arc-shaped.
The fishing head 5 further comprises a spiral slip 14, the spiral slip 14 is provided with a cavity which penetrates up and down, the inner surface of the cavity is matched with the outer surface of each stage of conical section 12 of the conical column body 11, and the spiral slip 14 is movably sleeved on the conical column body 11.
In order to make the conical cylinder 11 and the spiral slips 14 in rotation-stopping fit, a key groove 15 is formed in the spiral slips 14 and is matched with a key block 13 on the conical cylinder 11, and the length of the key groove 15 is about 1.5 times of the length of the key block 13, so that the key block 13 can slide up and down in the key groove 15 after the key groove 15 is matched with the key block 13.
The spiral slips 14 are provided with splitting grooves 16 extending from bottom to top, the splitting grooves extend from the lower ends of the spiral slips 14 from bottom to top to four fifths of the length of the spiral slips 14, the width of each splitting groove 16 is 1mm, and the two splitting grooves 16 are respectively communicated with the two key grooves. Due to the existence of the split groove 16, when the inner surface of the cavity of the spiral slip 14 is subjected to an axial external force, the spiral slip 14 can be expanded outwards, so that the outer diameter of the spiral slip is increased, when the spiral slip 14 is positioned in the inner cavity of the fish, the outer wall of the spiral slip 14 and the inner wall of the fish can be clamped mutually by the expansion of the spiral slip 14, and therefore when the fishing string is lifted, the spiral slip 14 can drive the fish to go upwards.
A left-hand screw 17 is arranged on the outer surface of the screw slips 14, the direction of the left-hand screw 17 is opposite to the direction of a right-hand screw used in a conventional threaded connection, and in the embodiment, the right-hand screw is used for connecting the connector 1 and the fishing string. After the milling operation is completed, when the fish can not be fished out, the fishing pipe column can be fished rightwards while being lifted, the fishing pipe column transmits the torque to the milling sleeve 2 of the milling mechanism, then the saw-shaped step 8 on the milling sleeve 2 transmits the torque to the saw-shaped hanging table 81 of the fishing mechanism, the conical cylinder 11 of the fishing mechanism transmits the torque to the spiral slip 14 through the key block 13, and finally the left-handed spiral 17 on the spiral slip 14 helps the spiral slip 14 to withdraw from the inner cavity of the fish, so that the safe withdrawal of the milling and fishing integrated tool is realized.
The lower end of the conical cylinder 11 is connected with a guide head 18 through threads, the guide head 18 is provided with an inner cavity which is specifically a stepped blind hole, and the inner wall of the small hole section of the stepped blind hole is provided with threads for being connected with the lower end of the conical cylinder 11 through threads.
When the fishing mechanism is assembled, the upper end of the conical column body 11 penetrates into the spiral slip 14 from bottom to top, the key block 13 on the conical column body 11 is clamped into the key groove 15 of the spiral slip 14, then the guide head 18 is in threaded connection with the lower end of the conical column body 11, the inner diameter of the large hole section of the stepped blind hole of the guide head 18 is slightly larger than the outer diameter of the conical column body 11, so that an annular space is formed near the outer wall of the conical column body 11, the annular space can contain the lower end of the spiral slip 14, the lower end of the spiral slip 14 is deep into the annular space, the lower inlet of the cavity of the spiral slip 14 can be sealed by the guide head 18, foreign matters can be prevented from entering a gap between the spiral slip 14 and the conical column body 11, and the lower end of the spiral slip 14 can be. Then the upper end of the conical column body 11 is connected with the lower end of the righting body 4 through threads, so that the assembly of the fishing mechanism is completed,
it should be noted that the screw slips 14 and the cone body 11 cannot be disassembled after they are assembled.
When the construction, salvage the tubular column and be connected with the connector 1 of shell milling mechanism, will the utility model discloses a top of fish in the well is gone into to the shell milling salvage integration instrument, continues down, spiral slips 14 get into in the fish inner chamber and with the contact of fish inner wall, continue down in-process shell milling head 3 can clear up the annular space foreign matter around the fish, when the stop platform 9 of salvage mechanism and the contact of fish top, salvage the mechanism's descending and meet and hinder, try to carry salvage the tubular column this moment.
When lifting the fishing pipe column, the righting body 4 can drive the conical cylinder 11 to move upwards, the key block 13 on the conical cylinder 11 moves upwards in the key groove 15, because the spiral slips 14 is in contact with the inner wall of the fish, friction exists, the spiral slips 14 do not move, and because the conical cylinder 11 is provided with the conical section 12 which is thin at the top and thick at the bottom, the inner wall of the spiral slips 14 can receive the axial component force of the conical cylinder 11, so the spiral slips 14 can expand outwards, the outer wall of the spiral slips 14 and the inner wall of the fish are clamped mutually, the friction force of the two is larger, and the fishing mechanism can capture the fish.
If the load is greater than the weight of the original fishing pipe column when the fishing pipe column is lifted, the fishing mechanism captures the fallen fish, then the fishing pipe column is continuously lifted, and if the resistance in the whole lifting process is small, the fallen fish can be directly fished out.
If the pipe column cannot be continuously lifted or the resistance in the lifting process is large, it is indicated that the milling mechanism may not mill the casing in place, pressure is applied to the fishing pipe column, when the pressure is greater than the maximum shearing force which can be borne by the shear pin 6, the shear pin 6 is sheared, the milling mechanism and the fishing mechanism are displaced relatively, the fishing mechanism can slide in the milling barrel 2, and meanwhile, due to the blocking of the saw-shaped step 8 on the lower end face of the centralizing body 4, the fishing mechanism cannot be separated out from the milling barrel 2. The casing milling mechanism can continuously casing mill annular foreign matters around the fish, the pipe column can be continuously tried to be lifted in the casing milling process until the fish can be fished out, and in the casing milling process, the workover fluid enters the underground along the through-flow hole 7 in the righting body 4 and the through-flow hole 10 of the saw-shaped step 8 and can carry chips generated by casing milling out of the ground. After the milling is finished, the fishing pipe column is lifted, the milling mechanism goes upwards, the saw-shaped step 8 is matched with the saw-shaped hanging table 81 at the lower end of the centralizing body 4, so that the milling mechanism can drive the fishing mechanism to go upwards, the fishing mechanism drives the captured fish to go upwards, and finally the fish is fished out from the well.
After the milling operation is completed, when the fish can not be fished out, the fishing pipe column can be fished rightwards while being lifted, the fishing pipe column gives torque to the milling sleeve 2 of the milling mechanism and finally transmits the torque to the spiral slips 14, and finally the left-handed spiral 17 on the spiral slips 14 helps the spiral slips 14 to withdraw from the inner cavity of the fish, so that the milling and fishing integrated tool can be safely withdrawn.
The utility model discloses an embodiment 2 of the integrated instrument is salvaged in the shell milling, the shell milling in this embodiment salvages the difference of the integrated instrument and the shell milling in above-mentioned embodiment 1 and only lies in: as shown in fig. 6, the centralizing body is in a cross-column shape with a cross-shaped cross section, the outer side surfaces of four centralizing body bosses 19 of the cross-column centralizing body are arc surfaces 20 matched with the inner wall of the milling sleeve, a gap between every two adjacent centralizing body bosses 19 is a through hole for passing the workover fluid, and the inner wall of the milling sleeve is fixedly connected with the arc surfaces of the centralizing bodies through shear pins.
The utility model discloses an embodiment 3 of the integrated instrument is salvaged in the shell milling, the shell milling in this embodiment salvages the difference of the integrated instrument and the shell milling in above-mentioned embodiment 1 and salvages the integrated instrument and only lie in: the sleeve milling mechanism and the fishing mechanism are connected through a spring bolt structure, specifically, the spring bolt structure is arranged on a righting body of the fishing mechanism, the spring bolt structure comprises a spring bolt and a spring connected with the spring bolt, the spring bolt can move along the axial direction of the spring when being pressed so as to compress the spring, when the pressure is large enough, the spring bolt can be pressed into the righting body, the spring bolt is provided with an inclined bolt face and a plane opposite to the inclined bolt face of the spring bolt, the plane is horizontally arranged and faces the direction of the sleeve milling head, a locking groove for the spring bolt to be inserted so as to fix the righting body of the fishing mechanism in the sleeve milling cylinder is formed in the inner wall of the sleeve milling cylinder, and the spring is compressed so that the spring bolt is completely separated from the locking groove in the sleeve milling cylinder, and the maximum pressure which the spring bolt can bear is the set value in the aforementioned description. After the fishing mechanism catches the fish, the fishing pipe column is lifted, and if the resistance in the whole lifting process is small, the fish can be directly fished out; if the pipe column cannot be continuously lifted or the resistance is large in the lifting process, it is shown that the sleeve milling mechanism may not be in place in the sleeve milling process, pressure is applied to the fishing pipe column, the inner wall of the sleeve milling barrel can extrude the inclined tongue face of the tongue structure to compress the spring in the tongue structure, when the pressure is greater than the maximum pressure which can be borne before the tongue completely breaks away from the lock groove in the sleeve milling barrel, the tongue breaks away from the lock groove and is pressed into the centralizing body, the sleeve milling mechanism and the fishing mechanism are separated and generate relative displacement, the fishing mechanism can slide in the sleeve milling barrel, and meanwhile, due to the blocking of the annular step on the lower end face of the centralizing body, the fishing mechanism cannot break away from the sleeve milling barrel.
The utility model discloses an embodiment 4 of the integrated instrument is salvaged in the shell milling, the shell milling in this embodiment salvages the difference of the integrated instrument and the above-mentioned shell milling among embodiment 1 and salvages only lie in: the stop table is four bosses which are distributed circumferentially, and gaps between every two adjacent bosses are overflowing holes for the passing of workover fluid.
The utility model discloses an embodiment 5 of the integrated instrument is salvaged in the shell milling, the shell milling in this embodiment salvages the difference of the integrated instrument and the above-mentioned shell milling among embodiment 1 and salvages only lie in: the thickness of the stop table is larger than the diameter of the shear pin, and the inner wall of the milling sleeve is fixedly connected with the stop table through the shear pin.
The utility model discloses an embodiment 6 of the integrated instrument is salvaged in the shell milling, the shell milling in this embodiment salvages the difference of the integrated instrument and the above-mentioned shell milling among embodiment 1 and salvages only lie in: the blocking structure for blocking the fishing mechanism from the milling sleeve is four arc-shaped steps which are uniformly distributed along the inner wall of the milling sleeve.
The utility model discloses an embodiment 7 of the integrated instrument is salvaged in the shell milling, the shell milling in this embodiment salvages the difference of the integrated instrument and the above-mentioned shell milling among embodiment 1 and salvages only lie in: the stop table and the fishing head extend out of the milling mechanism.
The utility model discloses an embodiment 8 of the integrated instrument is salvaged in the shell milling, the shell milling in this embodiment salvages the difference of the integrated instrument and the above-mentioned shell milling among embodiment 1 and only lies in: the conical cylinder in the embodiment 1 has multiple stages of conical sections which are thin at the top and thick at the bottom, and in the embodiment, the conical cylinder only has one stage of conical sections which are thin at the top and thick at the bottom.
The utility model discloses an embodiment 9 of the integrated instrument is salvaged in the shell milling, the shell milling in this embodiment salvages the difference of the integrated instrument and the shell milling among the above-mentioned embodiment 1 and only lies in: the spiral slips and the conical column body in embodiment 1 realize the rotation stopping fit through the key groove fit, and in the implementation, the conical column body is provided with the stop pin, and the spiral slips is provided with the jack that supplies the stop pin to insert correspondingly, and the size of this jack in the upper and lower direction is greater than the diameter of stop pin for the stop pin can be at the jack internalization.
The utility model discloses an embodiment of integration tubular column system is salvaged in the cover milling, and the structure of integration tubular column system is salvaged in the cover milling is still including salvaging the tubular column on the basis of the embodiment of the integration instrument is salvaged in above-mentioned arbitrary cover milling of cover milling, and wherein the cover milling is salvaged the integration instrument and is fixed in the bottom of salvaging the tubular column, specifically, the connector of cover milling mechanism is in the same place with the bottom fixed connection who salvages the tubular column.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (26)
1. A milling and fishing integrated tool comprises a milling mechanism and a fishing mechanism;
the shell mills the mechanism and includes:
sleeving and milling a barrel;
the connector is arranged at the upper end part of the sleeve milling barrel;
the sleeve milling head is arranged at the lower end part of the sleeve milling barrel;
it is characterized in that the preparation method is characterized in that,
the salvaging mechanism is fixedly connected with the inner wall of the sleeve milling barrel through a retaining structure, when the sleeve milling mechanism bears downward acting force relative to the salvaging mechanism and the acting force is greater than a set value, the retaining structure fails, and the sleeve milling mechanism moves relative to the salvaging mechanism;
and a blocking structure for blocking the salvaging mechanism from separating from the milling sleeve is arranged on the inner wall of the milling sleeve.
2. The integrated milling and fishing tool of claim 1, wherein the retaining structure is a shear pin connecting the fishing mechanism and the milling barrel.
3. The milling and fishing integrated tool of claim 1, wherein the fishing mechanism comprises a righting body and a fishing head fixedly connected with the righting body, the outer peripheral surface of the righting body is matched with the inner wall of the milling sleeve, and the righting body can freely slide in the milling sleeve after the structure fails.
4. The milling and fishing integrated tool of claim 2, wherein the fishing mechanism comprises a righting body and a fishing head fixedly connected with the righting body, the outer peripheral surface of the righting body is matched with the inner wall of the milling barrel, the shear pin is connected with the inner wall of the milling barrel and the righting body, and the righting body can freely slide in the milling barrel after the shear pin is sheared.
5. The shell milling and fishing integrated tool of claim 4, wherein the centralizing body is cylindrical, and a through-flow hole is formed in the centralizing body.
6. The milling and fishing integrated tool of any one of claims 3 to 5, wherein a stop is provided between the centralizer and the fishing head for contacting the top of a fish to limit the position of the fishing mechanism.
7. The milling and fishing integrated tool of claim 6, wherein the stop table is a convex ring structure, an overflowing hole is formed in the convex ring structure, and the outer peripheral surface of the stop table is in contact with the inner wall of the milling barrel.
8. The integrated milling and fishing tool of any one of claims 1 to 5, wherein the stop structure is a stepped structure.
9. The integrated milling and fishing tool of claim 6, wherein the stop table and a portion of the fishing head are within the milling barrel.
10. The integrated milling and fishing tool of claim 3, wherein the fishing head comprises:
the cone column body comprises one or more than two cone sections which are thin at the top and thick at the bottom and can be detachably connected with the lower end of the righting body;
the spiral slips are provided with split grooves extending from bottom to top and can be radially expanded and contracted, the spiral slips are sleeved on the conical cylinder body from top to bottom, the inner surface of the spiral slips is matched with the outer surface of each stage of conical section, and the spiral slips can be driven by each stage of conical section to radially contract or expand when the conical cylinder body moves up and down relative to the spiral slips;
the outer surface of the spiral slip is provided with a left-handed spiral, the spiral slip is in circumferential upper rotation fit with the conical cylinder body, and the spiral slip can exit from the inner cavity of the fish when the fishing pipe column rotates rightwards.
11. The integrated milling and fishing tool of claim 10, wherein the helical slips and the conical cylinder are engaged in a spline to achieve a rotation stop engagement.
12. The integrated milling and fishing tool as claimed in claim 11, wherein the tapered cylinder is provided with a key block, the screw slip is provided with a key groove adapted to the key block, and the key groove is communicated with the splitting groove, so that the key block can enter the key groove when the screw slip is sleeved on the tapered cylinder from top to bottom.
13. The integrated milling and fishing tool of any one of claims 10 to 12, wherein a guide head is connected to the lower end of the conical cylinder, the guide head has an inner cavity, an annular space is formed between the outer wall of the conical cylinder and the inner cavity of the guide head, and the lower end of the spiral slip penetrates into the annular space.
14. A sleeve milling and salvaging integrated pipe column system comprises a salvaging pipe column and a sleeve milling and salvaging integrated tool fixed at the bottom of the salvaging pipe column;
the sleeve milling and fishing integrated tool comprises a sleeve milling mechanism and a fishing mechanism;
the shell mills the mechanism and includes:
sleeving and milling a barrel;
the connector is arranged at the upper end part of the sleeve milling barrel;
the sleeve milling head is arranged at the lower end part of the sleeve milling barrel;
it is characterized in that the preparation method is characterized in that,
the salvaging mechanism is fixedly connected with the inner wall of the sleeve milling barrel through a retaining structure, when the sleeve milling mechanism bears downward acting force relative to the salvaging mechanism and the acting force is greater than a set value, the retaining structure fails, and the sleeve milling mechanism moves relative to the salvaging mechanism;
and a blocking structure for blocking the salvaging mechanism from separating from the milling sleeve is arranged on the inner wall of the milling sleeve.
15. The casing milling and fishing integrated tubing string system of claim 14, wherein the retaining structure is a shear pin connecting the fishing mechanism and the casing milling barrel.
16. The casing milling and fishing integrated tubular column system according to claim 14, wherein the fishing mechanism comprises a righting body and a fishing head fixedly connected with the righting body, the outer peripheral surface of the righting body is matched with the inner wall of the casing milling barrel, and the righting body can freely slide in the casing milling barrel after the structure fails.
17. The casing milling and fishing integrated pipe column system according to claim 15, wherein the fishing mechanism comprises a righting body and a fishing head fixedly connected with the righting body, the outer peripheral surface of the righting body is matched with the inner wall of the casing milling barrel, a shear pin is connected with the inner wall of the casing milling barrel and the righting body, and the righting body can freely slide in the casing milling barrel after the shear pin is cut off.
18. The casing milling and fishing integrated tubular column system according to claim 17, wherein the centralizing body is cylindrical, and a through-flow hole is formed in the centralizing body.
19. The casing milling and fishing integrated tubular string system of any one of claims 16 to 18, wherein a stop is provided between the centralizer and the fishing head for contacting the top of a fish to limit the position of the fishing mechanism.
20. The casing milling and fishing integrated pipe column system according to claim 19, wherein the stop table is of a convex ring structure, an overflowing hole is formed in the convex ring structure, and the outer peripheral surface of the stop table is in contact with the inner wall of the casing milling barrel.
21. The casing milling and fishing integrated tubular string system of any one of claims 14 to 18, wherein the stop structure is a step structure.
22. The casing milling and fishing integrated tubular string system of claim 19, wherein the stop table and a portion of the fishing head are within the casing milling barrel.
23. The casing milling and fishing integrated tubing string system of claim 16, wherein the fishing head comprises:
the cone column body comprises one or more than two cone sections which are thin at the top and thick at the bottom and can be detachably connected with the lower end of the righting body;
the spiral slips are provided with split grooves extending from bottom to top and can be radially expanded and contracted, the spiral slips are sleeved on the conical cylinder body from top to bottom, the inner surface of the spiral slips is matched with the outer surface of each stage of conical section, and the spiral slips can be driven by each stage of conical section to radially contract or expand when the conical cylinder body moves up and down relative to the spiral slips;
the outer surface of the spiral slip is provided with a left-handed spiral, the spiral slip is in circumferential upper rotation fit with the conical cylinder body, and the spiral slip can exit from the inner cavity of the fish when the fishing pipe column rotates rightwards.
24. The casing milling and fishing integrated tubular column system of claim 23, wherein the screw slips and the conical column body are in rotation-stopping fit through key slot fit.
25. The casing milling and fishing integrated tubular column system according to claim 24, wherein the conical cylinder is provided with a key block, the spiral slip is provided with a key groove adapted to the key block, and the key groove is communicated with the splitting groove, so that the key block can enter the key groove when the spiral slip is sleeved on the conical cylinder from top to bottom.
26. The milling and fishing integrated tubular string system of any one of claims 23 to 25, wherein a guide head is connected to the lower end of the conical cylinder, the guide head has an inner cavity, an annulus is provided between the outer wall of the conical cylinder and the inner cavity of the guide head, and the lower end of the spiral slip penetrates into the annulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921809627.6U CN211370335U (en) | 2019-10-25 | 2019-10-25 | Integrated tool for milling and fishing and pipe column system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921809627.6U CN211370335U (en) | 2019-10-25 | 2019-10-25 | Integrated tool for milling and fishing and pipe column system |
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| Publication Number | Publication Date |
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| CN211370335U true CN211370335U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921809627.6U Active CN211370335U (en) | 2019-10-25 | 2019-10-25 | Integrated tool for milling and fishing and pipe column system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196485A (en) * | 2020-11-11 | 2021-01-08 | 大庆石油管理局有限公司 | Horizontal well is with cover milling tool |
| CN113309482A (en) * | 2021-06-17 | 2021-08-27 | 浙江科技学院 | Deepwater wellhead cutting and fishing integrated tool and operation method |
-
2019
- 2019-10-25 CN CN201921809627.6U patent/CN211370335U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196485A (en) * | 2020-11-11 | 2021-01-08 | 大庆石油管理局有限公司 | Horizontal well is with cover milling tool |
| CN113309482A (en) * | 2021-06-17 | 2021-08-27 | 浙江科技学院 | Deepwater wellhead cutting and fishing integrated tool and operation method |
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