CN109779551B

CN109779551B - Underground falling object salvaging device for oil exploitation

Info

Publication number: CN109779551B
Application number: CN201910258144.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2021-04-13
Anticipated expiration: 2039-04-01
Also published as: CN109779551A

Abstract

The invention discloses a salvaging device for underground falling objects for oil exploitation, which comprises a logging instrument and a bearing cable connected with the logging instrument, the upper end and the lower end of the bearing cable at the upper side of the logging instrument are respectively provided with a fixed supporting seat, the fixed supporting seat at the upper end is provided with an upper fixing frame, two ends of the upper fixing frame are respectively and symmetrically provided with a connecting rod mechanism, the link mechanisms are driven by the first motor to rotate, and the upper ends of the shearing machine frames are driven by the two link mechanisms to mutually approach or depart from each other, the shearing rack is of a scissor-type structure consisting of two rack plates with the same shape and size, the cable shearing device automatically shears a cable at the joint of the cable shearing device and a logging instrument, the cable is effectively prevented from being pulled apart and falling off and being accumulated in a well to form an accumulation height of more than ten meters or even higher, and great difficulty in subsequent unfreezing work is avoided. After shearing the cable, the shearing device can be returned uphole with the carrier cable.

Description

Underground falling object salvaging device for oil exploitation

Technical Field

The invention relates to the field of underground tools for oil exploitation, in particular to an underground junk fishing device for oil exploitation.

Background

At present, along with the continuous development of development technologies of oil and gas fields, large-inclination oil and gas fields are more and more open holes, various tools and equipment used underground need to be lowered and operated through a bearing cable, for example, in the process that a logging instrument is lowered and lifted by the bearing cable, the situation that a well track is irregular is often met, the geological conditions for developing the oil and gas fields are complex, the large-inclination and large-displacement directional well technology and the well depth track are difficult to control, due to the fact that the drilling speed is improved, the period is shortened, if a well hole and mud are not well treated, the well wall is unstable, the well track is poor and other complex well hole environments are caused, the situation that logging is blocked is increased, and the obstacles can not be spanned frequently.

When the related tool equipment needs to be lifted and retracted, the bearing cable is still pulled upwards under the condition that the bearing cable cannot be unlocked, the bearing cable exceeds the bearing limit of the bearing cable, the cable is broken at a certain position, and the part of the cable connected with the tool equipment can be freely fallen and accumulated in the underground to be positioned at the position of the clamping position, a plurality of wells for oil and gas exploitation are deep by thousands of meters, after the cable falls off, the accumulation height of dozens of meters or even higher is formed in the underground, great difficulty is brought to subsequent unlocking work, and therefore the underground falling object fishing device for oil exploitation is provided for solving the problems.

Disclosure of Invention

The invention aims to provide a device for salvaging underground falling objects for oil exploitation, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a fishing device for underground falling objects for oil exploitation comprises a logging instrument and a bearing cable connected with the logging instrument, the upper end and the lower end of the bearing cable at the upper side of the logging instrument are respectively provided with a fixed supporting seat, an upper fixed frame is arranged on the fixed supporting seat at the upper end, two ends of the upper fixing frame are respectively and symmetrically provided with a connecting rod mechanism which extends to the outer side of the upper fixing frame, two ends of the two link mechanisms are respectively and movably hinged with the upper end of the shearing machine frame, the link mechanisms realize rotation through a first motor, and the upper ends of the cutting machine frames are close to or far away from each other under the drive of the two connecting rod mechanisms respectively, the shearing machine frame is a scissor-type structure consisting of two frame plates with the same shape and size, a first hydraulic slide block is arranged at the lower end of the shearing machine frame, when the upper ends of the shearing machine frames are close to or far away from each other, the first hydraulic slide blocks on the two sides of the lower ends of the shearing machine frames also do the same movement of close to or far away from each other;

the first hydraulic slide block is transversely clamped at one end of a hydraulic cavity of the lower fixing frame in a sliding manner, the lower fixing frame is fixedly arranged on a fixed supporting seat at the lower end, the bearing cable penetrates through the two fixed supporting seats, the upper fixing frame and the lower fixing frame, hydraulic oil is filled in the hydraulic cavity, the other end of the hydraulic cavity is hermetically clamped with a second hydraulic slide block on the shearing device, the shearing device is provided with cutter heads driven by a second motor, and the cutter heads on the two shearing devices are positioned at two sides of the bearing cable;

the lower end of the lower fixing frame is fixedly provided with a starting device, the starting device comprises an electric wire fixedly bound on a bearing cable and an upper contact block electrically connected with the electric wire, the upper contact block is fixedly arranged at the lower end of the cast iron pin, the lower end of the upper contact block is movably connected with a lower contact block through a spring, the lower contact block is movably arranged at the bottom end of the lower fixing frame, the lower contact block is electrically connected with the input end of a normally-open type delay switch, and the output end of the delay switch is electrically connected with the first motor and the second motor;

the cast iron pin is transversely installed at two ends of two sides of the lower fixing frame, the upper end of the cast iron pin is in movable contact with the rib plate, the rib plate is installed on a connecting boss above the logging instrument, the upper end of the connecting boss is connected with the protective cover in a sealing mode through the rubber strip, the protective cover is fixedly installed on the outer sides of the two fixing supporting seats, the upper fixing frame, the shearing rack, the lower fixing frame, the starting device and the shearing device, and the bearing cable penetrates through the upper end of the protective cover and extends outwards.

Preferably, the fixed bearing seat comprises two semicircular encircling tiles with the same shape and size, a rubber block fixed on the inner sides of the semicircular encircling tiles and a bolt for locking the two semicircular encircling tiles, the radian of the inner wall of each semicircular encircling tile is matched with the radian of the outer side of the bearing cable, and the rubber block is tightly attached to the bearing cable.

Preferably, the upper fixing frame is a plate-shaped structure welded at the lower end of the upper fixing support seat, two ends of the upper fixing frame are rotatably provided with a connecting rod mechanism, the connecting rod mechanism comprises a central rod rotatably mounted on the plate-shaped upper fixing frame, a first motor fixedly connected with a rotating shaft of the central rod, secondary connecting rods movably connected at two ends of the central rod, outer connecting rods movably connected at outer ends of the secondary connecting rods, and a sleeve plate movably connected at outer ends of the outer connecting rods, and the sleeve plate is hinged with a fixing lug on the inner side of the upper end of the frame plate; the same sides of the two link mechanisms are simultaneously connected to the same frame plate.

Preferably, the frame plate comprises a main frame arm, an inclined frame arm welded at the lower end of the main frame arm, a fixed shaft sleeve fixedly arranged between the main frame arm and the inclined frame arm, a straight frame arm welded at the lower end of the inclined frame arm, and a first hydraulic slide block arranged at the lower end of the straight frame arm.

Preferably, the first hydraulic slide block is slidably clamped in a hydraulic cavity on the lower fixing frame, the lower fixing frame comprises a fixing plate and two vertical plates welded at the upper end of the fixing plate, a rotating shaft is fixedly connected between the two vertical plates, a wear-resistant sleeve covers the rotating shaft, fixed shaft sleeves on the two frame plates are movably sleeved on the outer side of the wear-resistant sleeve in an alternating mode, through holes for bearing cables to pass through are vertically penetrated through the rotating shaft and the wear-resistant sleeve, and cable through grooves with the same size are formed in positions, corresponding to the through holes, on the fixing plate; the lower fixing frame further comprises two cutting cavity plates welded at the lower end of the fixing plate, a through rectangular cavity is arranged in each cutting cavity plate, a sealing partition plate is transversely arranged in each rectangular cavity, the upper portion and the lower portion of each rectangular cavity are divided into a cutting knife cavity and a hydraulic cavity, the two ends of each hydraulic cavity are respectively connected with a first hydraulic sliding block and a second hydraulic sliding block in a sliding and clamping mode, and a first sealing strip and a second sealing strip are respectively embedded around each first hydraulic sliding block and each second hydraulic sliding block.

Preferably, the shearing tool cavity is movably provided with a cutter disc frame of the shearing device, the section of the cutter disc frame is of a U-shaped structure, a cutter disc is arranged in the cutter disc frame in a rotating mode, a second motor is arranged on a rotating shaft of the cutter disc, a pushing plate is vertically arranged on the cutter disc frame located at the lower end of the cutter disc, and the inner side of the pushing plate is connected with a second hydraulic sliding block.

Preferably, the cutter head is a circular cutter head, the outer side of the cutter head is provided with sawteeth, two surfaces of the cutter head are respectively a convex cutter head convex surface and a horizontal cutter head plane, and when the cutter head is cut off, the two cutter head planes between the two cutter heads are overlapped in a staggered mode.

Preferably, the lower ends of the two shearing devices are provided with auxiliary fixing devices for discontinuously clamping the bearing cable, each auxiliary fixing device comprises two U-shaped sliding frames, the upper ends of the sliding frames are provided with dovetail blocks, the dovetail blocks are clamped in dovetail grooves at the bottom end of the lower fixing frame, the two sliding frames are movably connected through two return springs, the sliding frames at the two ends of each return spring are respectively provided with electromagnets, the two electromagnets on the same return spring are oppositely attracted after being electrified, the inner ends of the two sliding frames are respectively provided with half-ring-shaped holding tiles matched with the bearing cable in shape, and the inner walls of the holding tiles are provided with rubber pads; the electromagnet is connected in series with a power supply circuit of the first motor and the second motor.

Preferably, a side plate is arranged at the bottom end of the shearing cavity plate, a cast iron pin is transversely inserted into the side plate, when the bearing cable is pulled upwards, shearing force on the rib plate is applied to the cast iron pin, and the limit value of the shearing force borne by the cast iron pin is smaller than the limit value of the tensile force borne by the bearing cable.

Preferably, the upper end of the protective cover is provided with an outlet for the carrier cable to extend out, a sealing sleeve is fixedly arranged on the outlet, and the sealing sleeve is fixedly connected with the carrier cable.

Compared with the prior art, the invention has the beneficial effects that:

1. the cable cutting device can automatically cut the cable at the joint of the cable and the logging instrument before the cable reaches the bearing limit, effectively prevent the cable from being pulled and broken to fall off and being accumulated in a well to form an accumulation height of more than ten meters or even higher, and avoid great difficulty for subsequent unfreezing work. After shearing the cable, the shearing device can be returned uphole with the carrier cable.

2. The shearing device is provided with the protective cover, the upper end of the protective cover is of an arc-shaped structure, the clamping can be effectively prevented when the bearing cable is lifted or lowered, the upper end of the protective cover is in sealing connection with the sealing sleeve, the lower end of the protective cover and the logging instrument are sealed by the rubber strip, and drilling fluid can be prevented from entering the protective cover to interfere with the shearing device to work.

3. The upper end and the lower end of the shearing device are fixed with the bearing cable through the semicircular encircling tiles, the rubber blocks are arranged inside the semicircular encircling tiles, friction force between the semicircular encircling tiles is increased, the semicircular encircling tiles are connected through bolts and are anti-loose through split pins, and the encircling tiles and the cable are effectively prevented from sliding.

4. The bottom of the shearing device is provided with an auxiliary fixing device, so that the cutter is ensured to be vertical to the cable in the shearing process of the cutter, and the condition that the cutter is clamped and sheared continuously is prevented.

5. The edge of the cutter head of the shearing device is provided with the inclined cutting edges, the cutter head rotates at a high speed in the working process, the cutter heads at two ends are distributed in a vertically staggered mode, and the shearing device is in a scissor shape at the moment of shearing, so that cables can be sheared more favorably.

6. The shearing machine frame is of a labor-saving lever structure, the force at the upper end of the machine frame is amplified to the lower end of the machine frame to remove the shearing device, and the load of the first motor is reduced.

7. Sealed hydraulic oil between the first hydraulic slide block and the second hydraulic slide block at the lower end of the shearing machine frame can lubricate and prevent metal parts from impacting and weakening shearing force.

8. The starting device utilizes the characteristic of weak shearing resistance of the cast iron pin, adopts the mode of cutting off the cast iron pin and switching on the switch, has ingenious structure and saves cost

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic view of the external structure of the present invention;

FIG. 3 is a schematic diagram of a logging tool configuration;

FIG. 4 is a schematic perspective view of the present invention;

FIG. 5 is a partial cross-sectional view of the present invention;

FIG. 6 is an enlarged view taken at A in FIG. 5;

FIG. 7 is a schematic structural diagram of a starting device;

FIG. 8 is an enlarged view at E in FIG. 4;

FIG. 9 is a schematic perspective view of the upper fixing frame and the fixing support base;

FIG. 10 is a top view of the upper fixing frame;

FIG. 11 is a cross-sectional view taken at B-B of FIG. 10;

FIG. 12 is a perspective view of the fixed bearing seat;

FIG. 13 is a front view of the fixed bearing mount;

FIG. 14 is a cross-sectional view of the stationary bearing;

fig. 15 is a schematic perspective view of the cutting mechanism;

fig. 16 is a schematic structural view of the frame plate;

FIG. 17 is an enlarged view at C of FIG. 16;

FIG. 18 is a schematic perspective view of the lower fixing frame and the fixing support base;

FIG. 19 is a cross-sectional view of the lower mount;

FIG. 20 is a cross-sectional view taken at D-D of FIG. 19;

FIG. 21 is a perspective view of the lower fixing frame;

FIG. 22 is a perspective view of the cutting device;

FIG. 23 is a front view of the cutting apparatus;

FIG. 24 is a top view of the cutting apparatus;

FIG. 25 is a perspective view of the cutter head;

FIG. 26 is a cutter head cross-sectional view;

FIG. 27 is a perspective view of the auxiliary fixture;

fig. 28 is a sectional view of the auxiliary fixture.

In the figure:

1, a logging instrument, 101 a bearing cable, 102 a connecting boss, 103 rib plates and 104 rubber strips;

2, fixing a support seat, 21 semicircular encircling tiles, 22 rubber blocks and 23 bolts;

3 an upper fixing frame, a 301 connecting rod mechanism, a 3011 central rod, a 3012 secondary connecting rod, a 3013 outer connecting rod, a 3014 sleeve plate and a 3015 first motor;

4, shearing a rack, 41 rack plates, 411 main frame arms, 412 fixing shaft sleeves, 413 inclined frame arms, 414 straight frame arms, 415 first hydraulic sliding blocks, 416 first sealing strips and 417 fixing lugs;

5, a lower fixing frame, a 51 fixing plate, a 5101 dovetail groove, a 5102 cable through groove, a 52 vertical plate, a 53 rotating shaft, a 54 wear-resistant sleeve, a 55 through hole, a 56 shearing cavity plate, a 5601 sealing partition plate, a 5602 shearing cutter cavity, a 5603 hydraulic cavity and a 57 side plate;

6, starting a device, 61 a wire, 62 lower contact blocks, 63 springs, 64 cast iron pins, 65 upper contact blocks and 66 time delay switches;

7, a shearing device, a 71 cutter disc frame, a 72 pushing plate, a 73 cutter disc, a 73a cutter disc convex surface, a 73b cutter disc plane, a 74 second motor, a 75 second hydraulic slide block and a 76 second sealing strip;

8 auxiliary fixing devices, 81 sliding frames, 8101 dovetail blocks, 82 return springs, 83 holding tiles, 84 rubber pads and 85 electromagnets;

9 protective cover, 901 sealing sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3 and fig. 12-14, the present invention provides a technical solution: the utility model provides an oil development is with junk fishing device in pit, including logging instrument 1 and the bearing cable 101 of being connected with logging instrument 1, fixed bearing 2 is installed respectively to the upper and lower end of the bearing cable 101 of logging instrument 1 upside, fixed bearing 2 includes two shapes, the semicircle of the size unanimity encircles tile 21, fix and encircle the inboard gluey piece 22 of tile 21 and the bolt 23 of locking two semicircles and encircle tile 21 at the semicircle, the inner wall radian of semicircle encircle tile 21 is identical with the outside radian that bears cable 101, and glue the inseparable laminating of piece 22 on bearing cable 101. The two semicircular encircling tiles 21 are locked through the bolts 23, the fixing and supporting seat 2 is fixed on the bearing cable 101, the shearing equipment is convenient to mount, and split pins penetrate through the bolts 23 to prevent the bolts 23 from loosening when the equipment works.

Referring to fig. 4-11, an upper fixing frame 3 is disposed on a fixing support base 2 located at the upper end, two ends of the upper fixing frame 3 are respectively and symmetrically provided with a link mechanism 301, the link mechanism 301 extends to the outer side of the upper fixing frame 3, two ends of the two link mechanisms 301 are respectively and movably hinged with the upper end of the cutting frame 4, the link mechanisms 301 are rotated by a first motor 3015, and the upper ends of the cutting frame 4 are driven by the two link mechanisms 301 to be close to or far away from each other;

the upper fixing frame 3 is a plate-shaped structure welded at the lower end of the upper fixing support seat 2, two ends of the upper fixing frame 3 are rotatably provided with a link mechanism 301, the link mechanism 301 comprises a central rod 3011 rotatably mounted on the plate-shaped upper fixing frame 3, a first motor 3015 fixedly connected with a rotating shaft of the central rod 3011, secondary links 3012 movably connected at two ends of the central rod 3011, outer links 3013 movably connected at the outer ends of the secondary links 3012, sleeve plates 3014 movably connected at the outer ends of the outer links 3013, and the sleeve plates 3014 are hinged with fixing lugs 417 on the inner side of the upper end of the frame plate 41; the same sides of the two link mechanisms 301 are simultaneously connected to the same frame plate 41. The first motor 3015 is a forward and reverse rotation motor, and the first motor 3015 drives the central rod 3011 to rotate, thereby driving the secondary connecting rod 3012 and the outer connecting rod 3013 at both sides to fold or unfold, and further pulling the upper ends of the two frame plates 41 to approach to or move away from each other, so that the scissor type cutting machine frame 4 realizes opening and closing movements.

Referring to fig. 4-5 and fig. 15-17, the cutting frame 4 is a scissor-type structure formed by two frame plates 41 with the same shape and size, and a first hydraulic slide block 415 is disposed at the lower end of the cutting frame 4, and when the upper ends of the cutting frame 4 approach or separate from each other, the first hydraulic slide blocks 415 at the two sides of the lower end of the cutting frame also move to approach or separate from each other;

frame plate 41 includes a main frame arm 411, an inclined frame arm 413 welded to a lower end of main frame arm 411, a fixed bushing 412 fixed between main frame arm 411 and inclined frame arm 413, a straight frame arm 414 welded to a lower end of inclined frame arm 413, and a first hydraulic slide 415 mounted to a lower end of straight frame arm 414.

Referring to fig. 6 and fig. 18-21, the first hydraulic slider 415 is laterally clamped to one end of a hydraulic cavity 5603 of the lower fixing frame 5 in a sliding manner, the lower fixing frame 5 is fixedly mounted on the fixed supporting seat 2 at the lower end, the bearing cable 101 passes through the two fixed supporting seats 2, the upper fixing frame 3 and the lower fixing frame 5, hydraulic oil is contained in the hydraulic cavity 5603, and the other end of the hydraulic cavity 5603 is sealed and clamped to the second hydraulic slider 75 on the shearing device 7; when the first hydraulic slide 415 moves towards the inner side of the hydraulic cavity 5603 under the action of the shearing machine frame 4, hydraulic oil in the cavity is squeezed, the second hydraulic slide 75 is pushed to move towards the inner side, and when no force is applied to the shearing machine frame 4, the pressure of the hydraulic oil is reduced, and the first hydraulic slide 415 and the second hydraulic slide 75 are pushed to reset.

The first hydraulic slider 415 is slidably clamped in the hydraulic cavity 5603 on the lower fixing frame 5, the lower fixing frame 5 comprises a fixing plate 51 and two vertical plates 52 welded at the upper end of the fixing plate 51, a rotating shaft 53 is fixedly connected between the two vertical plates 52, a wear-resistant sleeve 54 covers the rotating shaft 53, fixed shaft sleeves 412 on the two frame plates 41 are alternately and movably sleeved outside the wear-resistant sleeve 54, through holes 55 for bearing the cables 101 to pass through are vertically penetrated through the rotating shaft 53 and the wear-resistant sleeve 54, and cable through grooves 5102 with the same size are arranged on the fixing plate 51 corresponding to the through holes 55; the lower fixing frame 5 further comprises two shearing cavity plates 56 welded at the lower end of the fixing plate 51, a through rectangular cavity is arranged in each shearing cavity plate 56, a sealing partition 5601 is transversely arranged in each rectangular cavity, the upper portion and the lower portion of each rectangular cavity are divided into a shearing cutter cavity 5602 and a hydraulic cavity 5603, two ends of each hydraulic cavity 5603 are respectively in sliding clamping connection with the first hydraulic slide block 415 and the second hydraulic slide block 75, and a first sealing strip 416 and a second sealing strip 76 are respectively embedded around each of the first hydraulic slide block 415 and the second hydraulic slide block 75.

Referring to fig. 22-26, the cutting devices 7 are provided with cutter heads 73 driven by the second motor 74, and the cutter heads 73 of the two cutting devices 7 are positioned at two sides of the carrying cable 101; a cutter disc frame 71 of the shearing device 7 is movably arranged in the shearing cutter cavity 5602, the section of the cutter disc frame 71 is of a U-shaped structure, a cutter disc 73 is rotatably arranged in the cutter disc frame 71, a second motor 74 is arranged on a rotating shaft of the cutter disc 73, a pushing plate 72 is vertically arranged on the cutter disc frame 71 at the lower end of the cutter disc 73, the inner side of the pushing plate 72 is connected with a second hydraulic slide block 75, the cutter disc 73 is driven to move inwards while the second hydraulic slide block 75 moves inwards, the upper part and the lower part of the two cutter discs 73 are overlapped alternately to be similar to a pair of scissors, the bearing cable 101 is sheared, and the cutter discs 73 rotate at a high speed under the driving of the second motor 74 when the two cutter discs 73 are overlapped partially, so that the.

The cutter disc 73 is a circular cutter disc, sawteeth are arranged on the outer side of the cutter disc 73, the two surfaces of the cutter disc 73 are respectively a convex cutter disc convex surface 73a and a horizontal cutter disc plane 73b, when the cutting is carried out, the two cutter disc planes 73b between the two cutter discs 73 are overlapped in a staggered mode, and the outer cutting edge of the cutter disc 73 is in an inclined state, so that the cutting of the bearing cable 101 is facilitated.

Referring to fig. 6 and 27-28, the lower ends of the two shearing devices 7 are provided with auxiliary fixing devices 8 for discontinuously clamping the carrier cable 101, each auxiliary fixing device 8 comprises two U-shaped sliding frames 81, the upper ends of the sliding frames 81 are provided with dovetail blocks 8101, the dovetail blocks 8101 are clamped in dovetail grooves 5101 at the bottom ends of the lower fixing frames 5, the two sliding frames 81 are movably connected through two return springs 82, the sliding frames 81 at the two ends of each return spring 82 are respectively provided with electromagnets 85, the two electromagnets 85 on the same return spring 82 attract each other after being electrified, the inner ends of the two sliding frames 81 are respectively provided with half-circular-ring-shaped holding tiles 83 which are matched with the carrier cable 101 in shape, and the inner walls of the holding tiles 83 are provided with rubber pads 84; the electromagnet 85 is connected in series with the power supply circuits of the first motor 3015 and the second motor 74, when the power supply circuits of the first motor 3015 and the second motor 74 are powered off, the electromagnet is powered off, the two sliding frames 81 are in an open state, when the electromagnet is powered on when the electromagnet is blocked, the sliding frames 81 are close to each other until the two holding tiles 83 clamp the bearing cable 101, the cable section is positioned, the cutter head 73 and the bearing cable 101 are in a vertical state when being cut off, after the cable is cut off, the electromagnet and the circuits of the first motor 3015 and the second motor 74 are powered off, and the two sliding frames 81 are opened under the action of the reset spring 82.

Referring to fig. 4-8, a starting device 6 is fixedly disposed at a lower end of the lower fixing frame 5, the starting device 6 includes an electric wire 61 fixedly bound to the bearing cable 101, and an upper contact block 65 electrically connected to the electric wire 61, the upper contact block 65 is fixedly disposed at a lower end of the cast iron pin 64, the lower end of the upper contact block 65 is movably connected to the lower contact block 62 through a spring 63, the lower contact block 62 is movably disposed at a bottom end of the lower fixing frame 5, the lower contact block 62 is electrically connected to an input end of a normally open type delay switch 66, and the delay switch 66 is electrically connected to an output end of the first motor 3015 and the second motor 74; the wire 61 is bound with the carrier cable 101 by a rope clip to supply power to the first motor 3015, the second motor 74 and the electromagnet 85.

The bottom end of the shearing cavity plate 56 is provided with a side plate 57, a cast iron pin 64 is transversely inserted on the side plate 57, when the bearing cable 101 is pulled upwards, the cast iron pin 64 is subjected to shearing force on the rib plate 103, and the limit value of the shearing force borne by the cast iron pin 64 is smaller than the limit value of the pulling force borne by the bearing cable 101. When the bearing cable 101 is lifted up in the case of a clamp, the shearing device moves upwards along with the bearing cable 101, the logging instrument 1 is clamped, so the cast iron pin 64 is subjected to shearing force, because the shearing resistance of the cast iron pin 64 is smaller than the tensile force borne by the bearing cable 101, the cast iron pin 64 is broken before the bearing cable 101 is broken, after the cast iron pin 64 is broken, the upper contact block 65 and the lower contact block 62 are electrically contacted under the action of the spring 63, the time delay switch 66 is switched on and off for a period of time, so when the time delay switch 66 is switched on, the electromagnet 85 of the auxiliary fixing device 8 is switched on, the power supply circuit of the first motor 3015 and the second motor 74 is switched on, the bearing cable 101 is sheared, then the time delay switch 66 is switched off, the corresponding first motor 3015 and the second motor 74 are switched off, and the electromagnet 85 is switched off.

Referring to fig. 1-5, two cast iron pins 64 are transversely installed at two ends of a lower fixing frame 5, respectively, and the upper ends of the cast iron pins 64 are in movable contact with rib plates 103, the rib plates 103 are installed on a connecting boss 102 above a logging instrument 1, the upper end of the connecting boss 102 is hermetically connected with a protective cover 9 through rubber strips 104, the protective cover 9 is fixedly installed at the outer sides of two fixed supporting seats 2, an upper fixing frame 3, a shearing rack 4, the lower fixing frame 5, a starting device 6 and a shearing device 7, a bearing cable 101 penetrates through the upper end of the protective cover 9 and extends outwards, an outlet for extending the bearing cable 101 is formed in the upper end of the protective cover 9, a sealing sleeve 901 is fixedly arranged on the outlet, the sealing sleeve 901 is fixedly connected with the bearing cable 101, and the protective cover 9 can prevent downhole impurities from entering the shearing.

The working principle is as follows: when the bearing cable 101 is lifted upwards, the shearing device moves upwards along with the bearing cable 101, when the logging instrument 1 is clamped in a well, the cast iron pins 64 are subjected to shearing force, and because the sum of the shearing resistance of the two cast iron pins 64 is smaller than the tensile force borne by the bearing cable 101, the cast iron pins 64 are broken before the bearing cable 101 is broken, after the cast iron pins 64 are broken, the upper contact block 65 and the lower contact block 62 are electrically contacted under the action of the spring 63, wherein the wire 61 is bound with the bearing cable 101 through a rope clamp to supply power to the first motor 3015, the second motor 74 and the electromagnet 85, and at the moment, the power supply circuits of the first motor 3015, the second motor 74 and the electromagnet 85 are disconnected after being connected for a period of time through the delay switch 66;

firstly, when the time delay switch 66 is switched on, the electromagnet 85 of the auxiliary fixing device 8 is switched on, the sliding frames 81 are mutually closed until the two holding tiles 83 clamp the bearing cable 101, the cable section is positioned, and the cutter disc 73 is ensured to be in a vertical state with the bearing cable 101 when being cut off;

meanwhile, a power supply circuit of the first motor 3015 is connected, the first motor 3015 drives the central rod 3011 to rotate, so as to drive the secondary connecting rod 3012 and the outer connecting rod 3013 on both sides to fold or unfold, and further pull the upper ends of the two frame plates 41 to approach or separate from each other, so that the scissor type cutting frame 4 realizes opening and closing movements, when the first hydraulic slider 415 moves towards the inner side of the hydraulic cavity 5603 under the action of the cutting frame 4, hydraulic oil in the cavity is squeezed, the second hydraulic slider 75 is pushed to move towards the inner side, the cutter discs 73 are driven to move towards the inner side while the second hydraulic slider 75 moves towards the inner side, the upper parts and the lower parts of the two cutter discs 73 are alternately overlapped, similar to a pair of scissors, the bearing cable 101 is cut, and when the two cutter discs 73 are partially overlapped, the cutter discs 73 rotate at a high speed under the drive of the second motor 74.

The bearing cable 101 is cut off, then the time delay switch 66 is powered off, the corresponding first motor 3015 and the corresponding second motor 74 are powered off, the acting force on the cutting rack 4 is lost, the pressure of hydraulic oil in the hydraulic cavity 5603 is reduced, the first hydraulic sliding block 415 and the second hydraulic sliding block 75 are pushed to reset, meanwhile, the electromagnet 85 is powered off, the two sliding frames 81 are opened under the action of the reset spring 82, the bearing cable 101 is loosened, the cutting device and the bearing cable 101 at the upper end are conveniently pulled out, and the logging instrument 1 meeting the jam is left for further processing.

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

1. The utility model provides an oil development is with junk fishing device in pit, includes logging instrument (1) and the bearing cable (101) of being connected with logging instrument (1), its characterized in that: the upper end and the lower end of a bearing cable (101) on the upper side of the logging instrument (1) are respectively provided with a fixed supporting seat (2), the fixed supporting seat (2) positioned at the upper end is provided with an upper fixing frame (3), two ends of the upper fixing frame (3) are respectively and symmetrically provided with a link mechanism (301), the link mechanism (301) extends to the outer side of the upper fixing frame (3), two ends of the two link mechanisms (301) are respectively and movably hinged with the upper end of a shearing rack (4), the link mechanisms (301) realize rotation through a first motor (3015), the upper ends of the shearing rack (4) are respectively close to or far away from each other under the driving of the two link mechanisms (301), the shearing rack (4) is of a scissor-type structure consisting of two rack plates (41) with the same shape and size, and the lower end of the shearing rack (4) is provided with a first hydraulic slide block (415), when the upper ends of the shearing machine frames (4) are close to or far away from each other, the first hydraulic sliding blocks (415) on the two sides of the lower ends of the shearing machine frames also do the same movement of close to or far away from each other;

the first hydraulic slide block (415) is transversely clamped at one end of a hydraulic cavity (5603) of a lower fixing frame (5) in a sliding mode, the lower fixing frame (5) is fixedly installed on a fixed supporting seat (2) located at the lower end, a bearing cable (101) penetrates through the two fixed supporting seats (2), the upper fixing frame (3) and the lower fixing frame (5), hydraulic oil is filled in the hydraulic cavity (5603), the other end of the hydraulic cavity (5603) is located, a second hydraulic slide block (75) on a shearing device (7) is clamped in a sealing mode, cutter discs (73) driven by a second motor (74) are arranged on the shearing device (7), and the cutter discs (73) on the two shearing devices (7) are located on two sides of the bearing cable (101);

the lower end of the lower fixing frame (5) is fixedly provided with a starting device (6), the starting device (6) comprises an electric wire (61) fixedly bound on a bearing cable (101) and an upper contact block (65) electrically connected with the electric wire (61), the upper contact block (65) is fixedly arranged at the lower end of a cast iron pin (64), the lower end of the upper contact block (65) is movably connected with a lower contact block (62) through a spring (63), the lower contact block (62) is movably arranged at the bottom end of the lower fixing frame (5), the lower contact block (62) is electrically connected with an access end of a normally open type delay switch (66), and a connection end of the delay switch (66) is electrically connected with a first motor (3015) and a second motor (74);

the cast iron pin (64) is transversely installed at two ends of two sides of the lower fixing frame (5), the upper end of the cast iron pin (64) is in movable contact with the rib plate (103), the rib plate (103) is installed on the connecting boss (102) above the logging instrument (1), the upper end of the connecting boss (102) is in sealing connection with the protective cover (9) through the rubber strip (104), the protective cover (9) is fixedly installed on the outer sides of the two fixing supporting seats (2), the upper fixing frame (3), the shearing rack (4), the lower fixing frame (5), the starting device (6) and the shearing device (7), and the bearing cable (101) penetrates through the upper end of the protective cover (9) and extends outwards.

2. The apparatus according to claim 1, wherein: the fixed bearing seat (2) comprises two semicircular encircling tiles (21) with the same shape and size, a rubber block (22) fixed on the inner side of each semicircular encircling tile (21) and a bolt (23) for locking the two semicircular encircling tiles (21), the radian of the inner wall of each semicircular encircling tile (21) is matched with the radian of the outer side of a bearing cable (101), and the rubber block (22) is tightly attached to the bearing cable (101).

3. The apparatus according to claim 1, wherein: the upper fixing frame (3) is of a plate-shaped structure welded at the lower end of the upper fixing support seat (2), two ends of the upper fixing frame (3) are rotatably provided with a connecting rod mechanism (301), the connecting rod mechanism (301) comprises a central rod (3011) rotatably mounted on the plate-shaped upper fixing frame (3), a first motor (3015) fixedly connected with a rotating shaft of the central rod (3011), secondary connecting rods (3012) movably connected at two ends of the central rod (3011), outer connecting rods (3013) movably connected at the outer ends of the secondary connecting rods (3012) and sleeve plates (3014) movably connected at the outer ends of the outer connecting rods (3013), and the sleeve plates (3014) are hinged with fixing lugs (417) on the inner side of the upper end of the frame plate (41); the same sides of the two link mechanisms (301) are simultaneously connected to the same frame plate (41).

4. The apparatus according to claim 1, wherein: the frame plate (41) comprises a main frame arm (411), an inclined frame arm (413) welded at the lower end of the main frame arm (411), a fixed shaft sleeve (412) fixedly arranged between the main frame arm (411) and the inclined frame arm (413), a straight frame arm (414) welded at the lower end of the inclined frame arm (413), and a first hydraulic sliding block (415) installed at the lower end of the straight frame arm (414).

5. The apparatus according to claim 4, wherein: the first hydraulic slide block (415) is clamped in a hydraulic cavity (5603) on a lower fixing frame (5) in a sliding mode, the lower fixing frame (5) comprises a fixing plate (51) and two vertical plates (52) welded at the upper end of the fixing plate (51), a rotating shaft (53) is fixedly connected between the two vertical plates (52), a wear-resistant sleeve (54) covers the rotating shaft (53), fixed shaft sleeves (412) on the two frame plates (41) are sleeved on the outer side of the wear-resistant sleeve (54) in an alternating and movable mode, through holes (55) used for bearing cables (101) to penetrate through are vertically arranged on the rotating shaft (53) and the wear-resistant sleeve (54), and cable through grooves (5102) with the same size are formed in the positions, corresponding to the through holes (55), on the fixing plate; lower mount (5) are still including welding two cutting off chamber boards (56) at fixed plate (51) lower extreme, be equipped with the rectangle cavity that runs through the formula in cutting off chamber board (56), transversely be equipped with sealed baffle (5601) in this rectangle cavity, separate into about the rectangle cavity and cut off sword chamber (5602) and hydraulic pressure chamber (5603), the first hydraulic pressure slider (415) of both ends difference slip joint and second hydraulic pressure slider (75) of hydraulic pressure chamber (5603), and inlay around first sealing strip (416) and second sealing strip (76) respectively of first hydraulic pressure slider (415) and second hydraulic pressure slider (75).

6. The oil exploitation underground junk fishing device of claim 5, wherein: the cutting device is characterized in that a cutter disc frame (71) of a cutting device (7) is movably arranged in the cutting cutter cavity (5602), the section of the cutter disc frame (71) is of a U-shaped structure, a cutter disc (73) is arranged in the cutter disc frame (71) in a rotating mode, a second motor (74) is arranged on a rotating shaft of the cutter disc (73), a pushing plate (72) is vertically arranged on the cutter disc frame (71) located at the lower end of the cutter disc (73), and a second hydraulic sliding block (75) is connected to the inner side of the pushing plate (72).

7. The apparatus according to claim 6, wherein: the cutter head (73) is a circular cutter head, sawteeth are arranged on the outer side of the cutter head, two surfaces of the cutter head (73) are respectively a convex cutter head convex surface (73a) and a horizontal cutter head plane (73b), and when the cutter head is cut off, the two cutter head planes (73b) between the two cutter heads (73) are overlapped in a staggered mode.

8. The apparatus according to claim 1, wherein: the lower ends of the two shearing devices (7) are provided with auxiliary fixing devices (8) for discontinuously clamping the bearing cable (101), the auxiliary fixing device (8) comprises two U-shaped sliding frames (81), a dovetail block (8101) is arranged at the upper end of each sliding frame (81), the dovetail block (8101) is clamped in a dovetail groove (5101) at the bottom end of the lower fixing frame (5), the two sliding frames (81) are movably connected through two return springs (82), electromagnets (85) are respectively arranged on sliding frames (81) at two ends of a return spring (82), two electromagnets (85) positioned on the same return spring (82) are oppositely attracted after being electrified, half-circular-ring-shaped holding tiles (83) matched with the bearing cable (101) in shape are respectively arranged at the inner ends of the two sliding frames (81), and rubber pads (84) are arranged on the inner walls of the holding tiles (83); the electromagnet (85) is connected in series with a power supply circuit of the first motor (3015) and the second motor (74).

9. The oil exploitation underground junk fishing device of claim 5, wherein: the bottom end of the shearing cavity plate (56) is provided with a side plate (57), a cast iron pin (64) is transversely inserted into the side plate (57), when the bearing cable (101) is pulled upwards, shearing force on the rib plate (103) is applied to the cast iron pin (64), and the limit value of the shearing force borne by the cast iron pin (64) is smaller than the limit value of the tensile force borne by the bearing cable (101).

10. The apparatus according to claim 1, wherein: the upper end of protection casing (9) is equipped with the export that is used for bearing cable (101) to stretch out, and the fixed seal cover (901) that is equipped with in this export, this seal cover (901) and bearing cable (101) fixed connection.