CN112554827A

CN112554827A - Oil field shaft junk fishing device

Info

Publication number: CN112554827A
Application number: CN202011443322.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-03-26
Anticipated expiration: 2040-12-11
Also published as: CN112554827B

Abstract

The invention relates to an oil field shaft junk fishing device, which comprises: the fishing device comprises a fishing barrel which is hollow inside and closed at two ends, wherein the lower part of the fishing barrel is provided with a plurality of fishing ports; the rotary shaft is rotatably arranged in the fishing barrel and is provided with a helical blade; the first power piece is arranged on the overshot and is in driving connection with the rotating shaft, the rotating shaft is driven to rotate by the first power piece and drives the helical blades to rotate together, so that the drilling fluid and foreign matters enter the overshot from the fishing opening, and the foreign matters entering the overshot move upwards along with the rotation of the helical blades and are stored in the overshot; the jacket mechanism is connected to the lower portion of the fishing barrel and can be opened, closed and adjusted, the jacket mechanism is arranged corresponding to the position of the fishing opening, and foreign matters at the fishing opening can be clamped through the opening, closing and adjusting jacket mechanism. The oil field shaft junk fishing device can realize comprehensive fishing of foreign matters, and has high fishing success rate.

Description

Oil field shaft junk fishing device

Technical Field

The invention relates to the technical field of petroleum equipment, in particular to an oil field shaft junk fishing device for fishing foreign matters in a well.

Background

Along with the continuous extension of oil field development time, oil field development later stage, separate zone water injection, sand control construction all needs the packer, and in operation construction, because take the existence of processes such as sealed tubular column unfreezing, can make partial packer rubber fall into the well, if untimely salvage the rubber that drops, a large amount of rubber fragments that are scraped off will suspend in the pit shaft, cause the meeting of sand washing, drifting, perforation etc. and hinder the phenomenon, the midway seat that triggers the packer easily when going into the packer seals, form the maloperation, rubber card valve's phenomenon has sometimes even appeared, seriously influenced the oil well exempted from repair period and the economic benefits of operation construction team. At this time, the failure can be removed only by workover operation, and normal production is resumed.

The main reasons for the formation of rubber drops in packers are as follows:

firstly, when the pipe column with the seal is blocked in operation, the pipe column with the seal is lifted and released for a plurality of times for a long time, so that the rubber of the rubber cylinder falls off or cracks.

Secondly, because the pipe column meets the card, can cause the packer to break, breakage when the cover mills, form the rubber junk of fritter at the pit shaft.

Thirdly, as the sleeve has the problems of burr, corrosion, scaling, deformation and the like, when the pipe column is lifted up, the rubber sleeve of the packer is damaged, and the rubber of the rubber sleeve is scratched to fall into the well.

Fourthly, the packer has long working time in the well, the rubber is aged, and the rubber falls off or is broken and falls into the well.

Fifthly, the quality of the packer rubber barrel has problems, for example, the packer leakage finding construction needs to be repeatedly set and pressed, and the rubber barrel with unqualified quality can be damaged and fall into the well.

The density of the rubber of the packer is different due to different types, the density is generally 1.01-1.2, and the fragments of the rubber of the packer belong to small object falling objects and are characterized by high elasticity, easy deformation, difficult breakage and strong suspension property. After the rubber sheet falls off, the rubber sheet can be retained in water and moves up and down along with the turbulent flow of liquid in a well hole, and the conventional well repairing tool is not easy to salvage and crush, so that subsequent construction operation cannot be normally carried out or a new drill sticking accident is caused, the well repairing time is greatly prolonged, and the implementation of various technological measures such as yield increase and injection increase of an oil-water well is hindered.

The existing fishing device is provided with a three-tooth inner hook, a grab and a reverse circulation fishing basket, but the fishing devices have the problems of low fishing success rate and poor fishing effect.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides an oil field shaft junk fishing device, and can solve the problems that the existing oil field shaft junk fishing device is difficult to fish and crush foreign matters in drilling fluid, has low fishing success rate and has poor fishing effect.

The technical scheme for realizing the purpose is as follows:

the invention provides an oil field shaft junk fishing device, which is used for extending into a well to fish foreign matters in drilling fluid, and comprises:

the fishing device comprises a fishing barrel which is hollow inside and closed at two ends, wherein the lower part of the fishing barrel is provided with a plurality of fishing ports;

the rotating shaft is rotatably arranged in the overshot and is provided with a helical blade;

the first power piece is arranged on the overshot and is in driving connection with the rotating shaft, the rotating shaft is driven to rotate by the first power piece and drives the helical blade to rotate together, so that the drilling fluid and foreign matters enter the overshot from the fishing opening, and the foreign matters entering the overshot move upwards along with the rotation of the helical blade and are stored in the overshot;

and the clamping sleeve mechanism is connected with the lower part of the fishing barrel in a sleeved mode and can be opened, closed and adjusted, the clamping sleeve mechanism is arranged corresponding to the fishing opening, and foreign matters at the fishing opening can be clamped by the clamping sleeve mechanism through opening, closing and adjusting.

The oil field shaft junk fishing device has a good fishing effect on foreign matters suspended in drilling fluid, rotary suction force can be formed through rotation of the rotary shaft and the helical blades, the drilling fluid and the foreign matters are sucked into the fishing barrel, the foreign matters can move upwards along with rotation of the helical blades after entering the fishing barrel and then are stored at the upper part of the fishing barrel, and the foreign matters can be subsequently lifted out of a well along with the fishing barrel. To the size be greater than the foreign matter of salvage mouth, it is in can not entering into an overshot, but helical blade rotation forms rotatory suction and can make these some foreign matters gathers in the salvage mouth department of an overshot, and then presss from both sides the foreign matter of overshot outside gathering through the cover mechanism that presss from both sides that opens and shuts the regulation to realized salvaging comprehensively of foreign matter, salvage the success rate height.

The oilfield shaft junk fishing device is further improved in that the jacket mechanism comprises a mounting seat arranged on the outer side of the fishing barrel, a plurality of first driving pieces arranged on the mounting seat and a barrel piece connected with the first driving pieces;

the first driving piece drives the barrel piece to extend towards the direction far away from the overshot so that the jacket mechanism is in an open state or retract towards the direction close to the overshot so that the jacket mechanism is in a closed state, and when the jacket mechanism is in the closed state, the barrel piece is butted to form a barrel-shaped structure for surrounding the overshot.

The oilfield shaft junk fishing device is further improved in that the oilfield shaft junk fishing device further comprises a cutting barrel sleeved on the fishing barrel and the jacket mechanism, and the cutting barrel is provided with a bottom opening;

a plurality of first ultrasonic cutting knives are arranged at the bottom of the cutting cylinder, and the first ultrasonic cutting knives are arranged in an inclined manner towards the inner side of the bottom opening;

the second driving piece is arranged between the top of the cutting barrel and the top of the overshot, the overshot is driven to move downwards by the second driving piece and extend out of the bottom opening of the cutting barrel or the overshot is driven to move upwards and retract into the cutting barrel from the bottom opening of the cutting barrel, and in the process that the overshot moves vertically, the first ultrasonic cutting knife can cut foreign matters clamped by the clamping sleeve mechanism and positioned outside the clamping sleeve mechanism.

The oil field shaft junk fishing device is further improved in that a plurality of second ultrasonic cutters are further arranged at the positions, close to the first ultrasonic cutters, of the lower portion of the cutting cylinder, and the second ultrasonic cutters are arranged towards the outer side of the cutting cylinder in an inclined mode;

the second ultrasonic wave cutting knife pass through the third driving piece install in on the cutting section of thick bamboo, through the third driving piece can drive the second ultrasonic wave cutting knife is towards keeping away from the direction removal regulation of cutting section of thick bamboo to the cooperation oil field pit shaft junk fishing device transfer and cut the foreign matter in the embedding wall of a well.

The oil field shaft junk fishing device is further improved in that the top of the cutting cylinder is rotatably connected with a connecting sleeve through a rotating mechanism;

the cutting cylinder is driven to rotate through the rotating mechanism, so that the position of the third ultrasonic cutting knife is adjusted.

The oilfield shaft junk fishing device is further improved in that the rotating mechanism comprises an inner gear ring fixedly connected with the top of the cutting cylinder, a gear meshed with the inner gear ring and a second power part in driving connection with the gear;

the inner gear ring is rotatably arranged on the connecting sleeve;

the second power part is arranged on the connecting sleeve, the gear is driven to rotate by the second power part, and the inner gear ring is driven to rotate by the rotation of the gear, so that the cutting cylinder is driven to rotate.

The oil field shaft junk fishing device is further improved in that the lower part of the cutting cylinder is provided with a protective cover which can move up and down along the cutting cylinder for adjustment;

the protective cover covers the outer sides of the first ultrasonic cutting knife and the second ultrasonic cutting knife;

the first ultrasonic cutting knife and the second ultrasonic cutting knife can be exposed by moving and adjusting the protective cover upwards.

The oil field shaft junk fishing device is further improved in that a plurality of hinges are rotatably connected to an opening at the bottom of the protective cover;

the hinge is arranged towards the inner side of the protective cover in an inclined mode.

The oil field shaft junk fishing device is further improved in that a taper sleeve mechanism capable of being opened and closed and adjusted is sleeved and connected to the lower portion of the fishing barrel and is located below the clamping sleeve mechanism;

the top of taper sleeve mechanism is equipped with the limiting plate, through opening taper sleeve mechanism can make the spacing foreign matter that corresponds of limiting plate is in order to cooperate first ultrasonic wave cutting knife cuts.

The oil field shaft junk fishing device is further improved in that a baffle is sleeved and connected to the lower portion of the fishing barrel and is arranged at the bottom of the clamping sleeve mechanism in a blocking mode.

Drawings

Fig. 1 is a schematic perspective view of the oil field shaft junk fishing device of the invention.

Fig. 2 is a schematic structural diagram of an extended state of an overshot in the oil field shaft junk fishing device of the invention.

Fig. 3 is a side view of the oilfield wellbore junk fishing apparatus of the present invention.

Fig. 4 is a side view of the overshot in an extended state in the oilfield wellbore junk fishing device of the present invention.

Fig. 5 is a cross-sectional view of a side of the oilfield wellbore junk fishing apparatus of the present invention lowered into a well.

Fig. 6 is a cross-sectional view of the other side of the oilfield wellbore junk fishing apparatus of the present invention lowered into a well.

Fig. 7 is a schematic perspective view of an overshot in the oil field shaft junk fishing device of the invention.

Fig. 8 is a schematic perspective view of the open state of the jacket mechanism of the overshot in the oil field shaft junk fishing device of the invention.

Fig. 9 is a cross-sectional view of an overshot in the oilfield wellbore junk fishing apparatus of the present invention.

Fig. 10 is a schematic perspective view of the open state of the jacket mechanism in the oilfield wellbore junk fishing device according to the present invention.

Fig. 11 is a top view of the collet mechanism in the oilfield wellbore junk fishing device of the present invention in an open state.

Fig. 12 is a schematic perspective view of a cutting cylinder in the oil field well bore junk fishing device of the present invention.

Fig. 13 is a partial cross-sectional view of a cutting cartridge in the oilfield wellbore junk fishing apparatus of the present invention.

Fig. 14 is a cross-sectional view of a cutting cartridge in the oilfield wellbore junk fishing apparatus of the present invention.

Fig. 15 is a schematic perspective view of a shield in the oil field shaft junk fishing device of the invention.

Fig. 16 is a cross-sectional view of a shield in the oilfield wellbore junk fishing apparatus of the present invention.

Fig. 17 is a schematic structural diagram of a hinge in the oilfield wellbore junk fishing device.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Fig. 1 shows a schematic perspective view of the fishing device for oilfield shaft junk according to the present invention. The oil field well shaft falling object fishing device is used for fishing foreign matters in drilling fluid when being placed in a well, wherein the foreign matters are fragments generated by well operation or fallen parts, such as packer rubber fragments or packer rubber. The oil field shaft junk fishing device can be used for fishing the fragment type foreign matters in the drilling fluid and the whole foreign matters, can realize fishing the foreign matters with different sizes, and has higher fishing success rate. The structure of the oil field shaft junk fishing device of the invention is explained below with reference to the accompanying drawings.

Referring to fig. 1, a schematic perspective view of the oilfield shaft junk fishing device of the present invention is shown, referring to fig. 4, a side view of the oilfield shaft junk fishing device of the present invention in an extended state is shown, and referring to fig. 5, a cross-sectional view of a side of the oilfield shaft junk fishing device of the present invention lowered into a well is shown. The structure of the oil field well bore junk fishing device of the present invention will be described with reference to fig. 1, 4 and 5.

As shown in fig. 1, 4 and 5, the oil field well bore junk fishing device 20 of the present invention is used for extending into a well 10 to fish foreign materials in drilling fluid, wherein the well 10 is preferably an oil well, drilling fluid is contained in the well, and foreign materials are mixed in the drilling fluid, and the oil field well bore junk fishing device 20 of the present invention is used for lowering into the well 10 to fish out the foreign materials in the drilling fluid.

The oil field shaft falling object fishing device comprises a fishing barrel 21, a rotating shaft 212, a first power part 221 and a jacket mechanism 23, wherein the fishing barrel 21 is hollow and two ends of the fishing barrel are closed, a plurality of fishing ports 211 are formed in the lower portion of the fishing barrel 21, the fishing ports 211 are distributed on the wall of the fishing barrel 21 at intervals, and drilling fluid and foreign objects can enter the fishing barrel 21 through the fishing ports 211. The rotating shaft 212 is rotatably mounted in the overshot 21, the rotating shaft 212 is provided with a helical blade 213, the rotating shaft 212 is vertically arranged in the overshot 21, the top and the bottom of the rotating shaft 212 are rotatably mounted in the overshot 21 through shaft holes, and the shaft holes are also internally provided with wear-resistant sleeves which are arranged at the corresponding end parts of the rotating shaft 212, so that the rotating shaft 212 can be prevented from being worn, and the service life of the rotating shaft is prolonged. The first power member 221 is installed on the overshot 21 and is in driving connection with the rotating shaft 212, the rotating shaft 212 is driven to rotate by the first power member 221, and the helical blade 213 is driven to rotate together, so that the drilling fluid and the foreign matters enter the overshot 21 from the fishing opening 211, and the foreign matters entering the overshot 21 move upwards along with the rotation of the helical blade 213 and are stored in the overshot 21. The clamping mechanism 23 is sleeved and connected to the lower part of the overshot 21, the clamping mechanism 23 is a mechanism capable of being adjusted to open and close, the clamping mechanism 23 is arranged corresponding to the position of the fishing opening 211, and foreign matters at the fishing opening 211 can be clamped by adjusting the clamping mechanism 23 to open and close.

When the oil field shaft falling object fishing device is used for fishing, the device is lowered into a well, then the jacket mechanism 23 is adjusted to be in an open state, the fishing opening 211 is exposed, then the first power part 221 drives the rotating shaft 212 and the helical blades 213 to rotate, under the rotating action of the rotating shaft 212 and the helical blades 213, drilling fluid drives foreign objects to gather at the periphery of the fishing barrel 21, wherein the foreign objects with the size smaller than that of the fishing opening 211 can enter the fishing barrel and enter the upper part of the fishing barrel 21 to be stored under the driving of the helical blades 213. And the size is greater than the foreign matter of salvage mouth 211 and can gather in the periphery of overshot 21, and jacket mechanism 23 adjusts to the closed condition this moment, can clip the foreign matter of salvage mouth 211 department to realized salvaging the foreign matter that the size is greater than salvage mouth 211, can effectually salvage the foreign matter in the drilling fluid totally, salvage effectually.

As shown in fig. 9, the overshot 21 is a reducer, and has a large top, a small bottom, a small fishing port, and a large liquid discharge port, so that the drilling fluid in the large drilling port can be discharged to store foreign matters.

In a preferred embodiment, the first power member 221 is a motor, and the rotating shaft 212 is driven to rotate by the motor.

In one embodiment of the present invention, as shown in fig. 7, 8, 10 and 11, the collet mechanism 23 includes a mounting seat 231 mounted on the outside of the overshot 21, a plurality of first driving members 232 mounted on the mounting seat 231, and a barrel piece 233 connected to the first driving members 232; the first drive member 232 drives the blade 233 to extend away from the overshot 21 so that the collet mechanism is in an open position or to retract toward the overshot 21 so that the collet mechanism 23 is in a closed position, and when the collet mechanism 23 is in the closed position, the blades 23 abut to form a cylindrical structure that surrounds the overshot 21.

Preferably, the shape of the mounting seat 231 is adapted to the shape of the overshot 21, and the mounting seat 231 is attached to the overshot 21 and is fastened to the overshot 21 by a connecting member, preferably a screw. Preferably, the mounting seat 231 is an arc-shaped plate. In order to avoid the installation seat 231 from influencing the fishing opening 211, the installation seat 231 is provided with a through opening corresponding to the fishing opening 211 so that foreign matters can enter the fishing barrel 21.

Further, the first driving member 232 can be telescopically adjusted, the barrel pieces 233 are driven to move by telescopically adjusting the first driving member 232, when the barrel pieces 233 move in a direction away from the overshot 21, gaps are formed between adjacent barrel pieces 233 due to separation, drilling fluid and foreign matters can be contacted with the fishing opening 211 through the gaps so as to enter the overshot 21, and at the moment, the jacket mechanism 23 is in an open state. When the barrel pieces 233 move in a direction approaching the overshot 21, the adjacent barrel pieces 233 approach each other, and when the first driving member 232 retracts to the proper position, the barrel pieces 233 are butted to form a barrel-shaped structure to surround the lower part of the overshot 21, so that foreign matters with a size larger than the size of the fishing opening 211 at the outer periphery of the lower part of the overshot 21 are clamped, and the fishing of the foreign matters with a large size is realized.

In a preferred embodiment, the first driving member 232 is a jack. The jack can be a cylinder or a hydraulic cylinder. In another preferred embodiment, the first driving member 232 is a push rod motor, which can be telescopically adjusted, and the barrel 233 is driven by the push rod motor to move and adjust.

Still further, in the example shown in fig. 10, the mounting seat 231 is an arc-shaped plate, and four mounting seats are provided, and are connected to the outer wall of the overshot 21 at intervals; two first power members 232 are connected to one mounting seat 231; the cylinder piece 233 is also an arc-shaped plate, and is provided with four pieces, the cylinder piece 233 is arranged corresponding to the mounting seat 231, and the cylinder piece 233 is connected with the corresponding first power piece 232, so that the four cylinder pieces 233 can be opened and closed for adjustment. In the example shown in fig. 8, 3 collet mechanisms 23 are arranged on the outer side of the overshot 21, adjacent collet mechanisms 23 are butted, and the length of the 3 collet mechanisms 23 is consistent with the length of the part of the overshot 21 where the fishing mouth 211 is arranged. In another preferred embodiment, the length of the mounting seat 231 and the blade 233 is the same as the length of the portion of the overshot 21 where the fishing opening 211 is located.

In an embodiment of the present invention, as shown in fig. 7 and 9, a baffle 214 is sleeved on the lower portion of the overshot 21, and the baffle 214 is blocked on the bottom of the collet mechanism 23. The baffle plate 214 is arranged to limit foreign matters clamped in the clamping sleeve mechanism 23, so that the foreign matters are prevented from falling out.

In one embodiment of the present invention, as shown in fig. 3 and 4, the oilfield wellbore junk fishing apparatus of the present invention further comprises a cutting barrel 24 sleeved on the fishing barrel 21 and the collet mechanism 23, and as shown in fig. 14, the cutting barrel 24 has a bottom opening 241; a plurality of first ultrasonic cutting knives 242 are installed at the bottom of the cutting cylinder 24, and the first ultrasonic cutting knives 242 are obliquely arranged towards the inner side of the bottom opening 241; referring to fig. 5, a second driving element 222 is installed between the top of the cutting cylinder 24 and the top of the overshot 21, the overshot 21 is driven by the second driving element 222 to move downwards and extend out of the bottom opening 241 of the cutting cylinder 24, or the overshot 21 is driven to move upwards and retract into the cutting cylinder 24 from the bottom opening 241 of the cutting cylinder 24, and in the process that the overshot 21 moves upwards and downwards, the first ultrasonic cutting knife 242 can cut foreign matters clamped by the collet mechanism 23 and positioned outside the collet mechanism 23. When foreign matter is caught between adjacent cylindrical pieces 233 of the collet mechanism 23, the foreign matter exposed to the outside of the collet mechanism 23 can be cut by the first ultrasonic cutter 242.

Further, as shown in fig. 7 and 8, the overshot 21 is provided with a mounting plate 216, and as shown in fig. 5 and 6, a connecting plate is provided in the cutting drum 24 corresponding to the top of the overshot 21, and a second driving member 222 is installed between the connecting plate and the mounting plate 216, and the second driving member 222 is connected to the connecting plate and the mounting plate 216.

Further, as shown in fig. 7, a guide sleeve 215 is provided on the mounting plate 216 of the overshot 21 in the same direction as the overshot 21; as shown in fig. 14, the connecting plate of the cutting cylinder 24 is provided with a guide post 245 corresponding to the guide sleeve 215, the guide sleeve 215 is sleeved on the guide post 245, and the guide sleeve 215 and the guide post 245 play a role in guiding and limiting, so that when the second driving member 222 drives the overshot 21 to move up and down, the overshot 21 always moves along the arrangement direction of the guide post 245, thereby improving the stability of movement adjustment. Preferably, there are two guide sleeves 215 and two second drive members 222.

In a preferred embodiment, the second driving member 222 is a jack. The jack can be a cylinder or a hydraulic cylinder. In another preferred embodiment, the second driver 222 is a push rod motor that is telescopically adjustable.

In an embodiment of the present invention, as shown in fig. 2, 4 to 6, a plurality of second ultrasonic cutters 243 are further disposed at positions of the lower portion of the cutting cylinder 24 close to the first ultrasonic cutter 242, and the second ultrasonic cutters 243 are disposed in an inclined manner toward the outer side of the cutting cylinder 24; as shown in fig. 14, the second ultrasonic cutting knife 243 is mounted on the cutting cylinder 24 through a third driving member 223, and the second ultrasonic cutting knife 243 can be driven by the third driving member 223 to move and adjust in a direction away from the cutting cylinder 24, and cut foreign matters embedded in the well wall in cooperation with the lowering of the oilfield wellbore junk fishing device.

When the oil well is constructed, blast holes are formed on the wall of the oil well, and therefore foreign matters in drilling fluid can be clamped into the blast holes and are difficult to salvage out. For solving this problem, set up second ultrasonic wave cutting knife 243 in the lower part of cutting barrel, the cutting edge of this second ultrasonic wave cutting knife 243 surpasss outer setting, it is the setting of the outside slope of second ultrasonic wave cutting knife 243, and second ultrasonic wave cutting knife 243 installs and to drive the direction removal of second ultrasonic wave cutting knife 243 towards the wall of a well through this third driving piece 223 on cutting barrel 24 through third driving piece 223, cooperation oil field pit shaft junk fishing device's transfer, this second ultrasonic wave cutting knife 243 cuts the foreign matter of card income porthole along the wall of a well, the part that exposes the wall of a well with the foreign matter cuts off and forms the fragment, and then can be salvaged by fishing barrel 21.

In a preferred embodiment, the third driving member 223 is a jack. The jack can be a cylinder or a hydraulic cylinder. In another preferred embodiment, the third driver 223 is a push rod motor that is telescopically adjustable.

Further, as shown in fig. 5, 6, 13 and 14, the top of the cutting cylinder 24 is rotatably connected to a coupling sleeve 261 by a rotating mechanism 25; the cutting cylinder 24 is driven to rotate by the rotating mechanism 25 so as to adjust the position of the second ultrasonic cutting blade 243. When a foreign body is found in the blasthole, the cutting barrel 24 can be driven to rotate by the rotating mechanism 24, and then the second ultrasonic cutting knife 243 is rotated to be aligned with the foreign body in the blasthole, so that the foreign body can be cut.

Still further, the rotating mechanism 25 comprises an inner gear ring 251 fixedly connected with the top of the cutting drum 24, a gear 252 engaged with the inner gear ring 251, and a second power member 253 in driving connection with the gear 252; the inner gear ring 251 is rotatably mounted on the connecting sleeve 261; the second power member 253 is mounted on the connecting sleeve 261, the gear 252 is driven to rotate by the second power member 253, and the inner gear ring 251 is driven to rotate by the rotation of the gear 252, so that the cutting drum 24 is driven to rotate. Preferably, the ring gear 251 is rotatably mounted on the connecting sleeve 261 through a slewing bearing, and the ring gear 251 and the cutting drum 24 are fixedly connected through a fastening bolt.

The second power member 253 is preferably a motor, and the gear 252 is driven by the motor to rotate, and the rotation of the gear 252 drives the inner gear 251 to rotate relatively, so that the inner gear 251 rotates with the cutting cylinder 24, thereby realizing the position adjustment of the second ultrasonic cutting knife 243. Preferably, the second ultrasonic cutters 243 are provided in four spaced positions on the outer side of the cutting cylinder 24, and when a foreign object is found in the borehole, the second ultrasonic cutter 243 closest to the borehole is adjusted by the rotating mechanism 25 to be aligned with the foreign object in the borehole.

Preferably, the foreign matter in the borehole can be observed by a downhole camera.

As shown in fig. 1 and 12, the connection sleeve 261 is used for being connected with hoisting equipment, and the oil field shaft junk fishing device is lowered into the well by using the hoisting equipment and then lifted out of the well after the fishing is completed.

Further, as shown in fig. 14, a transducer 246 is mounted on the connecting plate inside the cutting cylinder 24, and the transducer 246 is used to control the operation of the first ultrasonic cutting blade 242 and the second ultrasonic cutting blade 243.

In one embodiment of the present invention, as shown in fig. 12 to 14, the lower portion of the cutting cylinder 24 is provided with a shield 262 which can be adjusted up and down along the cutting cylinder 24; the shield 262 is covered on the outer sides of the first ultrasonic cutter 242 and the second ultrasonic cutter 243; the first ultrasonic cutting blade 242 and the second ultrasonic cutting blade 243 are exposed by moving the adjustment hood 262 upward.

Preferably, the wall of the cutting cylinder 24 is provided with an adjusting opening 244, as shown in fig. 15 and 16, the top of the shield 262 is provided with an inward bent snap plate 2623, the shield 262 is sleeved at the bottom of the cutting cylinder 24, the snap plate 2623 extends into the adjusting opening 244, the snap plate 2623 is supported and connected with the fourth driving member 224 with an ear plate fixed on the inner wall of the cutting cylinder 24, and the shield 262 is driven to move upward or downward by the telescopic adjustment of the fourth driving member 224.

In a preferred embodiment, the fourth driving member 224 is a jack. The jack can be a cylinder or a hydraulic cylinder. In another preferred embodiment, the fourth driving member 224 is a push rod motor, which is telescopically adjustable.

Further, as shown in fig. 15 to 17, a plurality of hinges 2621 are rotatably connected to the bottom opening 2622 of the shield 262; the hinge 2621 is disposed to be inclined toward the inside of the shield 262. Hinge 2621 is rotatable through two-way torsion spring and installs on protection casing 262, and hinge 2621 can carry out two-way rotation under the exogenic action like this, and external force can self return after removing. The bottom of protection casing 262 sets up round hinge 2621, can avoid oil field pit shaft junk fishing device to transfer or lift the in-process card through setting up hinge 2621 and hinder.

In one embodiment of the present invention, as shown in fig. 7 to 9, an openable and closable adjustable taper sleeve mechanism 27 is sleeved on the lower portion of the overshot 21, and the taper sleeve mechanism 27 is located below the jacket mechanism 23; the top of taper sleeve mechanism 27 is equipped with limiting plate 271, can make the spacing foreign matter that corresponds of limiting plate 271 cut with the first ultrasonic wave cutting knife of cooperation through opening taper sleeve mechanism 27. Specifically, as shown in fig. 5 and fig. 6, after the oilfield shaft junk fishing device is lowered into the well 10, the second driving element 222 drives the overshot 21 to move downward, so that the overshot 21 extends out of the cutting cylinder 24, the taper sleeve adjusting mechanism 27 is then in an open state, the limiting plate 271 extends outward, the second driving element 222 drives the overshot 21 to move upward, so that part of the overshot 21 enters the cutting cylinder 24, and the limiting plate 271 cannot be retracted into the cutting cylinder 24 due to the extending state, so that if foreign matters exist on the limiting plate 271, the foreign matters can be cut up by the first ultrasonic cutting knife 242 at the bottom of the cutting cylinder 24 through the limiting of the limiting plate 271, so that the foreign matters with small sizes can be formed, and then the fishing can be conveniently performed through the overshot 21.

Further, as shown in fig. 9, the taper sleeve mechanism 27 includes a fixing seat 272, a fifth driving member 273 and a plurality of taper pieces 274, the fixing seat 272 is fixedly connected to the outer wall of the overshot 21, the fifth driving member 273 is supported and connected between the fixing seat 272 and the taper pieces 274, and the plurality of taper pieces 274 can be butted to form a tapered cylindrical structure surrounding the overshot 21. The fifth driving member 273 can be telescopically adjusted, and the cone 274 can be moved and adjusted by telescopically adjusting the fifth driving member 273, so that the cone 274 extends outwards or retracts towards the overshot 21. The limiting plate 271 is fixedly connected to the conical sheet 274, and when the conical sheet 274 is in a retracted state, the limiting plate 271 is connected to form an annular plate and is sleeved outside the overshot 21. The taper sleeve mechanism 27 can also be adjusted by opening and closing to extrude foreign matters to two sides of the device, so that the foreign matters can be conveniently fished.

In a preferred embodiment, the fifth driving member 273 is a jack. The jack can be a cylinder or a hydraulic cylinder. In another preferred embodiment, the fifth driving member 273 is a push rod motor that is telescopically adjustable.

As shown in fig. 8 and 9, an end cap 217 is connected to the top of the overshot 21, and a first power member 221 is fixedly connected to the end cap 217. The top of the rotating shaft 212 is rotatably connected to an end cap 217. Preferably, the end cap 217 is threadably connected to the overshot 21.

The operation of the oil field shaft junk fishing device of the present invention will be explained.

The oil field shaft junk fishing device is put into a well, and when foreign matters exposed out of the well wall need to be cut, the process specifically comprises the following steps: the drive protection casing rebound exposes second ultrasonic wave cutting knife, and then the position of adjusting second ultrasonic wave cutting knife through rotary mechanism lets its and the foreign matter in the big gun hole align, and then drive second ultrasonic wave cutting knife removes in order to cut up the foreign matter in the big gun hole to letting the foreign matter break away from the big gun hole and fall into in the drilling fluid. The foreign bodies in the drilling fluid have large sizes and small sizes, wherein the large sizes are larger than the fishing openings, and the small sizes are smaller than the fishing openings.

In order to improve the fishing effect, can cut the jumbo size foreign matter, specifically: after the oil field shaft junk fishing device transferred the salvage position, overshot stretched out outside the cutting section of thick bamboo, and then taper sleeve mechanism opened, and an upward movement overshot for the spacing foreign matter of taper sleeve mechanism and let the foreign matter be cut up by first ultrasonic wave cutting knife, form the less fragment of size, can conveniently salvage. The action process can be repeated for a plurality of times to cut up foreign matters as much as possible and close the taper sleeve mechanism after completion.

After oil field pit shaft junk fishing device transferred to the well, can salvage the foreign matter, specifically: the fishing barrel stretches out outside the cutting barrel, the jacket mechanism is opened, first power part drive rotation axis is rotatory, let drilling fluid and foreign matter enter into the fishing barrel from the mouth of salvage through rotation axis and helical blade's rotation, and then the foreign matter is along with helical blade rebound and save in the fishing barrel, the jacket mechanism is closed, clip the foreign matter that the size is greater than the mouth of salvage through the jacket mechanism, shift up through second driving piece drive fishing barrel and retrieve to the cutting barrel in, first ultrasonic wave cutting knife can cut up the foreign matter that the jacket mechanism outside exposes among the recovery process, then repeat above-mentioned action process, it is clean to salvage up the foreign matter in the pit, lift oil field pit shaft junk fishing device.

The oil field shaft junk fishing device has the beneficial effects that:

the oil field shaft junk fishing device can realize cutting and fishing operations on complete rubber blocks, rubber sleeves and long rubber (foreign matters) in a well and a blast hole, and has high fishing efficiency.

According to the invention, the rubber is cut by the ultrasonic cutting knife, and cutting is realized by the energy of ultrasonic waves, so that the generation of chips can be reduced, the edge breakage and damage of the cut material are not caused, and the cutting of the rubber can be easily completed.

The oil field shaft junk fishing device is provided with the protective cover, and the end part of the protective cover is provided with the hinge, so that the oil field shaft junk fishing device can be prevented from being blocked in the lowering or lifting process. The hinge can two-way rotation, can avoid the protection casing to reciprocate the in-process and take place the hinge card and hinder the phenomenon.

According to the oil field shaft junk fishing device, the rotating shaft and the spiral blades are arranged, so that foreign matters are gathered at the periphery of the fishing barrel to be conveniently fished, and the foreign matters with the size smaller than a fishing opening can enter the fishing barrel to be fished under the rotating action.

The clamping sleeve mechanism which can be opened and closed and adjusted and is arranged in the oilfield shaft junk fishing device can be used for fishing out large-size foreign matters, and is large in fishing amount and high in efficiency.

The oil field shaft junk fishing device is provided with the baffle, foreign matters can be blocked in the jacket mechanism, and the foreign matters are prevented from falling out.

The lower end of the oil field shaft junk fishing device is provided with the taper sleeve mechanism capable of being opened and closed and adjusted, foreign matters at the lower end can be discharged to two sides, and a supporting effect is provided for the foreign matters when the first ultrasonic cutting knife cuts the foreign matters.

While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.

Claims

1. An oil field shaft junk fishing device for extending into a well to fish foreign objects in drilling fluid, the oil field shaft junk fishing device comprising:

2. The oilfield wellbore junk fishing apparatus of claim 1, wherein the collet mechanism comprises a mount mounted on an outside of the overshot, a plurality of first drives mounted on the mount, and a blade connected to the first drives;

3. The oilfield wellbore junk fishing device of claim 1 further comprising a cutting barrel mounted over the overshot and the collet mechanism, the cutting barrel having a bottom opening;

4. The oilfield wellbore junk fishing device of claim 3, wherein the lower portion of the cutting barrel further comprises a plurality of second ultrasonic cutters disposed adjacent to the first ultrasonic cutters, the second ultrasonic cutters being disposed in an inclined manner toward the outer side of the cutting barrel;

5. The oilfield wellbore junk fishing device of claim 4 wherein the top of the cutting barrel is rotatably connected to a coupling sleeve by a rotating mechanism;

6. The oilfield wellbore junk fishing device of claim 5, wherein the rotation mechanism comprises an internal gear fixedly connected to the top of the cutting drum, a gear engaged with the internal gear, a second power member drivingly connected to the gear;

the inner gear ring is rotatably arranged on the connecting sleeve;

7. The oilfield wellbore junk fishing device of claim 5 wherein the lower portion of the cutting barrel is provided with a shield that is vertically adjustable along the cutting barrel;

8. The oilfield wellbore junk fishing device of claim 7, wherein a plurality of hinges are rotatably connected to the bottom opening of the shield;

9. The oilfield wellbore junk fishing device of claim 3 wherein the fishing barrel has an openably and closably adjustable taper sleeve mechanism attached to a lower portion thereof, the taper sleeve mechanism being located below the collet mechanism;

10. The oilfield wellbore junk fishing device of claim 1 wherein a baffle is attached to a lower portion of the fishing barrel and is retained at a bottom of the collet mechanism.