CN114059938A - Underground cable shearing device with energy storage power - Google Patents
Underground cable shearing device with energy storage power Download PDFInfo
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- CN114059938A CN114059938A CN202111491034.1A CN202111491034A CN114059938A CN 114059938 A CN114059938 A CN 114059938A CN 202111491034 A CN202111491034 A CN 202111491034A CN 114059938 A CN114059938 A CN 114059938A
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- 238000010008 shearing Methods 0.000 title claims abstract description 71
- 238000004146 energy storage Methods 0.000 title claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 58
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims description 28
- 230000009471 action Effects 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 12
- 230000033001 locomotion Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000002411 adverse Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/021—Devices for subsurface connecting or disconnecting by rotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
Abstract
A downhole cable shearing device with energy storage power comprises an upper connector, a collision rod, a conversion seat, a transmission sleeve, a slip seat, a split slip, a core shaft rod, a cutter seat, a lower connector, a cutter blade, a disc spring group, a slip spring, a slip cylinder and a disc spring cylinder, wherein a contact surface between the collision rod and the conversion seat is a spiral inclined surface, the upper end of the transmission sleeve is connected with the lower end of the conversion seat, the side wall of the transmission sleeve is provided with a vertical notch and an L-shaped slotted hole, the slip seat, the split slip and the slip spring are contained in the transmission sleeve, the upper end of the core shaft rod is connected with the lower end of the transmission sleeve, the disc spring group is sleeved on the core shaft rod, the cutter seat is arranged in a clamping and expanding cavity formed in the lower connector, the cutter blade is hinged on the cutter seat and is initially limited by an elastic structural member, the device utilizes the instant release of preset shearing energy of the disc group spring to cut off a cable by shearing force with high impact strength, and releases the preset energy of the slip spring before shearing, the cable is fixed, the shearing is assisted, and the reliability and the working efficiency of the shearing construction of the underground cable can be improved.
Description
Technical Field
The invention relates to an underground cable shearing device, in particular to an underground cable shearing device with energy storage power.
Background
In the well logging or testing process of oil field production well, when the underground instrument is blocked and meets the blocking condition, in order to avoid the adverse effect of the underground cable on the salvage of the underground instrument, the cable shearing device is required to be used for shearing the cable when the underground instrument meets the blocking point under certain conditions, and then the cable is lifted to a wellhead. The logging cable shearing device currently used in production depends on the operation of auxiliary tubular columns such as a drill rod, an oil pipe and a continuous oil pipe, or the cable is pulled up through a wellhead, a shearing knife in a shearing device is pulled to turn over to complete shearing action, or the tubular column is pressed down through the wellhead, so that the top of a fish is forced to a short section to complete shearing action. However, in the action mode of shearing based on a wellhead pull cable or a push-down pipe column, under the conditions that a logging instrument is completely buried, the weak point of a bridle head cannot play a role in protection, a drilling tool is not provided for a derrick at the same time, and the cable and a drill rod are adhered due to failure of storage logging instruments and explosive cutting used in a well, the logging cable shearing device cannot be practically used because the drilling tool cannot be put into the pipe column for auxiliary cutting in a water hole, and the logging cable shearing device adopts a static shearing structure without impact momentum, so that the shearing efficiency is low, the pull load is higher, the cable is influenced by the dead weight of the cable, sometimes the cable is broken at a wellhead due to exceeding the cable bearing load, and when the cable has local defects in the well, the cable is broken at an unexpected part, so that the cable falls into the well to form residues, and cable shearing accidents are caused, brings very adverse effect and unnecessary economic loss to oil field production. Therefore, it is necessary to research and improve the logging cable shearing device in the prior art, create a functional route, optimize a product structure, develop a shearing device without the assistance of a drill rod or an oil pipe, expand the application range, enhance the shearing effect and improve the construction efficiency.
Disclosure of Invention
The invention aims to provide an underground cable shearing device with energy storage power, which changes the power action mode of underground cable shearing, does not need drill pipe or oil pipe assistance, enlarges the applicable well condition range and improves the reliability and the working efficiency of underground cable shearing construction.
A downhole wireline shearing device with stored power, comprising: the device comprises an upper joint, an impact rod, a conversion seat, a transmission sleeve, a slip seat, split slips, a core shaft rod, a cutter seat, a lower joint, a cutter blade, a disc spring group, a slip spring, and a slip cylinder and a disc spring cylinder which are combined to form an outer cylinder body.
Based on the assembly process requirement, the slip cylinder and the disc spring cylinder are connected up and down to form the split outer cylinder body, 2 slip limiting grooves are radially and symmetrically formed in the side wall of the slip cylinder, the slip limiting grooves are arranged in a strip shape along the axial direction, the upper joint is connected to the upper end of the slip cylinder, the lower joint is connected to the lower end of the disc spring cylinder, the impact rod, the conversion seat, the transmission sleeve, the core shaft rod and the cutter seat are sequentially connected and arranged in the outer cylinder body from top to bottom, and cable guide holes which are mutually connected and communicated are respectively formed in central axes of the upper joint, the impact rod, the conversion seat, the transmission sleeve, the core shaft rod, the cutter seat and the lower joint.
The contact surface between the impact rod and the conversion seat is a spiral inclined surface which is matched with each other, the spiral inclined surfaces are in staggered matched contact with each other and have a certain axial dislocation height H, an axial limiting groove is formed in the outer side wall of the impact rod, and the limiting groove is correspondingly matched with a limiting nail fixedly installed on the slip cylinder to limit the circumferential rotation of the impact rod and guide the axial movement of the impact rod.
The transmission sleeve is a cylindrical sleeve body, the upper end of the transmission sleeve is fixedly connected with the lower end of the conversion seat, 2 vertical notches which are radially symmetrical are formed in the side wall of the transmission sleeve, 2L-shaped slotted holes which are radially symmetrical with 2 vertical notches are formed in the positions which are alternated with the 2 vertical notches, the setting positions of the L-shaped slotted holes correspond to the setting positions of the slip limiting grooves in the slip cylinder, the slip seat, the split slips and the slip spring are sequentially contained in the slip seat from bottom to top, the inner side of the slip seat is provided with an inner conical surface, 2 outward-protruding lugs are radially symmetrical on the outer circumference of the slip seat, the outward-protruding lugs respectively penetrate through the vertical notches formed in the corresponding sides of the transmission sleeve and are respectively connected with the slip cylinder, the slip seat is fixed on the slip cylinder, a certain opening width of the vertical notches is kept, so that the transmission sleeve has a rotatable angle a relative to the slip seat, the split slips are of a cylindrical structure formed by combining 2 arc-shaped slip sheets, 2 radially symmetrical slip pins are arranged on the outer circumference of the split slips, the slip pins respectively penetrate through L-shaped slotted holes formed in the corresponding sides of the transmission sleeve in a matching manner and are inserted into slip limiting grooves formed in the slip cylinders at corresponding positions, the split slips can be selectively limited at the high position or released at the low position in the transmission sleeve through the mutual matching of the slip pins and high-position limiting platforms arranged in the L-shaped slotted holes, meanwhile, the slip pins are limited through the constraint and limiting of the slip limiting grooves, the split slips are limited to rotate circumferentially relative to the slip cylinders, the split slips are guided to axially move within the limiting range of the slip limiting grooves, the outer conical surface is arranged at the lower end of the split slips, and the inner conical surface on the slip seat forms a structure corresponding to and matching, the slip spring is arranged between the conversion seat and the split slips, is initially preset to be in a compression energy storage state, establishes primary energy storage power for assisting shearing of a clamping cable, and pushes the split slips into the slip seat under the action of the slip spring.
The upper end of the core shaft rod is connected with the lower end of the transmission sleeve in a limiting manner and extends downwards to enter the disc spring barrel, so that the core shaft rod can rotate together with the transmission sleeve and simultaneously keeps the freedom degree of axial movement relative to the transmission sleeve, the lower end of the core shaft rod is provided with a double-lug boss, the corresponding position of the disc spring barrel is provided with a slotted shoulder matched with the double-lug boss in a structure, the double-lug boss can be selectively matched with the slotted shoulder to form a protruding double lug to be supported on the shoulder surface of the slotted shoulder in a matched manner or matched with a structure extending into a notch formed in the slotted shoulder in a matched manner, the disc spring group is sleeved on a rod body of the core shaft rod and simultaneously supported between the core shaft rod and the slip barrel, elastic acting force is applied to the core shaft rod, and the disc spring group is initially preset to be in a compression energy storage state, and establishing secondary energy storage power for shearing the cable.
The downhole cable cutting device is characterized in that an expanding cavity is formed in the lower connector, the cutter seats are arranged in the expanding cavity, 1-2 cutter blades are inward-faced, are respectively and hingedly mounted on the cutter seats and are initially limited by elastic structural members, have rotational freedom degrees which are oriented to the central axis of the lower connector by taking hinge shafts as centers, and are back-to-back sides of the cutter seats as bearing curved surfaces.
When acting force with impact momentum is applied to the impact rod, the impact rod interacts with the conversion seat, mechanical energy is transmitted to the conversion seat, and self linear motion is converted into rotary motion of the conversion seat; furthermore, the conversion seat drives the transmission sleeve and the core shaft rod which are sequentially connected with the conversion seat to rotate together, and the transmission sleeve rotates to enable the conversion sleeve and the split slips to generate relative rotary motion as the arc-shaped slip pieces of the split slips are limited by the rotation of the slip cylinder; the slip pin is pushed by the elastic force of the slip spring, when the slip pin rotates to reach a clamping preset angle, the slip pin respectively preset on the high-position limiting platform in each L-shaped groove hole is pushed to each low-position limiting platform, so that the primary energy storage power in the slip spring is released, the split slips are pushed and released to the low position under the action of the preset elastic force of the slip spring, and in the downward movement process, the inner conical surface on the slip seat acts on the split slips, so that 2 arc-shaped slip sheets of the split slips are inwards folded, and a closed clamping state is formed; when the disc spring assembly continues to rotate to reach a shearing preset angle, the preset state on the core shaft rod is that the double-lug boss is supported on the shoulder surface of the slotted shoulder on the disc spring cylinder in a matched mode, the double-lug boss is changed into a matched state that the protruding double lugs on the double-lug boss are correspondingly overlapped with the notches formed in the slotted shoulder respectively, so that secondary energy storage power in the disc spring assembly is released, under the pushing action of the preset elastic force of the disc spring group, the two convex lugs are matched and extend into the notch, so that the core shaft rod obtains instantaneous impact momentum, through the structural matching of the core shaft rod, the cutter seat and the lower joint, the impact momentum acts on the bearing curved surface on the back side of the cutter blade to push the cutter blade to rotate and retract instantaneously or match with the cutter blade to rotate and retract instantaneously, so that dynamic cutting or shearing of the underground cable is realized.
The downhole cable shearing device with the energy storage power further comprises: the upper thrust bearing is arranged between the transmission sleeve and the slip cylinder, and the lower thrust bearing is arranged between the disc spring group and the mandrel rod so as to reduce the friction resistance of the transmission sleeve and the mandrel rod in rotation, improve the mechanical energy conversion efficiency and enhance the efficiency, stability and reliability of the working operation of the system.
Preferably, a support spring is arranged between the upper joint and the impact rod, and the elastic force of the support spring acts on the impact rod to enable the impact rod and the conversion seat to be in close fit contact with each other, so that momentum impact between spiral inclined surfaces is avoided in the process that the impact rod transmits energy to the conversion seat, energy loss is generated due to the fact that gaps exist between the spiral inclined surfaces, and energy utilization rate and transmission conversion efficiency are reduced.
The underground cable shearing device with the energy storage power is characterized in that a limiting connection mode of a rectangular pin groove structure is preferably adopted between the core shaft rod and the transmission sleeve, a rectangular pin is arranged at the upper end of the core shaft rod, a rectangular groove correspondingly matched with the rectangular pin structure is formed in the lower end of the transmission sleeve, the rectangular pin is matched and connected with the rectangular groove, the axial movement freedom degree of the core shaft rod relative to the transmission sleeve is reserved while the transmission sleeve transmits torque to the core shaft rod, and the rectangular pin groove structure has the advantages of simple structure, convenience in machining, reliability in matching and easiness in assembling and has good manufacturability and functionality.
The invention has the beneficial effects that: the underground cable shearing device with the energy storage power changes the traditional external power applying mode of the conventional underground cable shearing device, utilizes the instantaneous release of preset shearing energy of a disc spring group to cut off a cable by the instantaneous shearing force with high impact strength, has stable and reliable shearing effect, presets the release of clamping energy by a slip spring before shearing, fixes the cable, assists in shearing, further improves the stability, reliability and shearing effect of shearing, and is quite outstanding in shearing construction efficiency because the cable clamping and shearing are completed in the same operation action; simultaneously, the device collects chucking and shearing function in an organic whole, the design is thorough, compact structure, the integrated level is high, do not need auxiliary operation such as drilling rod or oil pipe in the use, only need earlier with the device in the same direction as the cable send to behind the predetermined position, then with the weight bar in the same direction as the cable rely on self gravity down in the well can accomplish the shearing operation, moreover, the operation is simple, high durability and convenient use, it is wide to be suitable for the well condition scope, moreover, whole operation process can not receive the influence of environment and geological conditions in the pit, the reliability of cable shearing construction in the pit has abundant assurance, higher work efficiency still has simultaneously.
Drawings
FIG. 1 is a cross-sectional block diagram of a dual blade downhole wireline shearing device with stored power according to example 1.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B in fig. 1.
Fig. 4 is a half-section structural view of the double-bladed downhole cable cutter with stored power of fig. 1 turned at 90 °.
Fig. 5 is a sectional view of C-C in fig. 4.
FIG. 6 is a schematic diagram of the position and structure of the L-shaped slot on the transmission seat.
FIG. 7 is a cross-sectional view of the single blade downhole wireline cutting device with stored energy power of example 2.
Fig. 8 is a sectional view taken along line D-D in fig. 7.
Fig. 9 is a half-section block diagram of the single blade downhole wireline cutting device with stored power of fig. 7, turned at 90 °.
Wherein: 1 is an upper joint, 2 is a striking rod, 3 is a conversion seat, 4 is a transmission sleeve, 5 is a slip seat, 6 is a split slip, 7 is a core shaft rod, 8 is a cutter seat, 9 is a lower joint, 10 is a cutter blade, 11 is a disc spring group, 12 is a slip spring, 13 is an upper thrust bearing, 14 is a lower thrust bearing, 15 is a slip cylinder, 16 is a disc spring cylinder, 17 is a cutter spring, 18 is a supporting spring, 19 is a slip pin, 20 is a slip limiting groove, 21 is a limiting nail, 22 is an L-shaped slotted hole, 23 is a connecting bolt, 24 is a connecting bolt, 25 is a cutter torsional spring and 26 is a cutter frame.
Detailed Description
The technical solution claimed by the present invention is further described below with reference to the specific embodiments and the accompanying drawings.
Example 1
A double-blade underground cable shearing device with energy storage power is shown in figures 1 to 5 and comprises an upper connector 1, an impact rod 2, a conversion seat 3, a transmission sleeve 4, a slip seat 5, a split slip 6, a mandrel rod 7, a cutter seat 8, a lower connector 9, a cutter blade 10, a disc spring group 11, a slip spring 12, a cutter spring 17, an upper thrust bearing 13, a lower thrust bearing 14, a support spring 18, a slip cylinder 15 and a disc spring cylinder 16.
The slip cylinder 15 and the disc spring cylinder 16 are connected up and down to form an outer cylinder body, 2 strip-shaped slip limiting grooves 20 are radially and symmetrically formed in the side wall of the slip cylinder 15, the upper joint 1 is connected to the upper end of the slip cylinder 15, the lower joint 9 is connected to the lower end of the disc spring cylinder 16, the impact rod 2, the conversion seat 3, the transmission sleeve 4, the core shaft rod 7 and the cutter seat 8 are sequentially connected and arranged in the outer cylinder body from top to bottom, and cable guide holes which are mutually connected and communicated are respectively formed in the central axes of the upper joint 1, the impact rod 2, the conversion seat 3, the transmission sleeve 4, the core shaft rod 7, the cutter seat 8 and the lower joint 9.
The contact surface between the impact rod 2 and the conversion seat 3 is a spiral inclined surface which is matched with each other, the spiral inclined surfaces are in mutual dislocation matching contact, the axial dislocation height H is kept to be 10 mm, a supporting spring 18 is arranged between the upper joint 1 and the impact rod 2, the elastic force of the supporting spring 18 acts on the impact rod 2, so that the spiral inclined surfaces which are matched with each other are in closer matching contact, an axial limiting groove is formed in the outer side wall of the impact rod 2, and the limiting groove is correspondingly matched with a limiting nail 21 on the slip cylinder 15.
The transmission sleeve 4 is a cylindrical sleeve body, the upper end of the transmission sleeve is fixedly connected to the lower end of the conversion seat 3 by using a connecting screw 24, the side wall of the transmission sleeve is provided with 2 vertical notches which are radially symmetrical, and the positions of the vertical notches are staggered by 90 degrees with the 2 vertical notches, and is also provided with 2L-shaped slotted holes 22 which are radially symmetrical at positions, as shown in figure 5, the slip seat 5, the split slips 6 and the slip spring 12 are sequentially accommodated in the transmission sleeve from bottom to top, the inner side of the slip seat 5 is provided with an inner conical surface, the outer circumference of the slip seat 5 is radially symmetrically provided with 2 outer convex lugs, the outer convex lugs respectively penetrate through the vertical notches arranged on the corresponding sides of the transmission sleeve 4 and are fixedly connected to the slip cylinder 15 by using a connecting bolt 23, the maximum rotatable angle a of the transmission sleeve 4 relative to the slip seat 5 is 30 degrees, the split slips 6 are 2 arc slip sheets combined to form a cylindrical structure, the outer circumference is provided with 2 radially symmetrical slip pins 19, the slip pins 19 respectively penetrate through the L-shaped slot 22 and are inserted into the slip limiting grooves 20 at corresponding positions, the lower end of the split slip 6 is provided with an outer conical surface, the outer conical surface and the inner conical surface on the slip seat 5 form a structure corresponding fit, the slip spring 12 is arranged between the conversion seat 3 and the split slip 6, the split slip 6 is pushed into the slip seat 5 under the action of the slip spring 12, and the upper thrust bearing 13 is arranged between the lower end of the transmission sleeve 4 and the slip cylinder 15.
The upper end of the core shaft rod 7 is provided with a rectangular pin, the rectangular pin is matched and limited with a rectangular groove formed in the lower end of the transmission sleeve 4, a double-lug boss is arranged at the lower end of the core shaft rod 7, a slotted shoulder matched with the double-lug boss in structure is arranged at the corresponding position of the disc spring barrel 16, the disc spring group 11 is sleeved on the rod body of the core shaft rod 7 and is simultaneously supported between the core shaft rod 7 and the slip barrel 15, and the lower thrust bearing 14 is arranged between the lower end of the disc spring group 11 and the core shaft rod 7.
An expanding cavity is arranged in the lower joint 9, an annular conical surface is arranged at the upper end of the expanding cavity, the cutter spring 17 is arranged in the expanding cavity and supported at the bottom end of the cutter holder 8, so that the upper end of the cutter holder 8 is abutted against the lower end of the core shaft rod 7 and is stably contacted and connected with the core shaft rod 7, blade grooves penetrating through side walls are respectively arranged at two radially symmetrical sides of the cutter holder 8, 2 cutter blades 10 are respectively embedded in the 2 blade grooves and are respectively hinged on the cutter holder 8 at the upper ends, the lower parts of the cutter blades are respectively provided with opposite and corresponding cutting edges, the cutting edges can be matched with each other to form a shearing structure, the cutter blades 10 can inwards rotate in a matching way by taking a hinged shaft as a center to realize the dynamic shearing function among the cutting edges, and inclined planes are respectively arranged at the back sides of the 2 cutter blades 10, the whole inclined surface is exposed out of the blade groove from the side surface of the cutter seat 8, corresponds to the annular conical surface structures on the lower joint 9 respectively and forms matching contact; when the secondary energy storage power in the disc spring group 11 is released, the core shaft rod 7 overcomes the counterforce of the cutter spring 17 to push the cutter seat 8 to move downwards together, in the moving process, the annular conical surface on the lower joint 9 acts on the inclined surface of the cutter blade 10, so that 2 cutter blades 10 respectively generate opposite rotating motion by taking the hinge shaft as the center of a circle, and the inner side cutting edges are correspondingly closed to form an instantaneous dynamic shearing state.
In the process of logging or testing of a production well, when a downhole instrument is blocked when the downhole instrument needs to cut off a cable underground, the double-blade downhole cable cutting device with the energy storage power can be applied, and the specific operation method comprises the following steps: firstly, cutting a cable at a wellhead, leading the end of the cable to pass through a cable guide hole between an upper connector 1 and a lower connector 9 of the double-blade underground cable shearing device with the energy storage power, straightening the cable to enable the double-blade underground cable shearing device with the energy storage power to slide down along the cable to the underground until the end reaches the connecting end of the cable and a logging instrument, then putting a weighting rod down along the cable to strike the impact rod 2 at the upper end of the double-blade underground cable shearing device with the energy storage power, sequentially releasing the energy storage power in a slip spring 12 and a disc spring group 11 through the transmission and conversion of impact mechanical energy to release the energy storage power to drive a split slip 6 to clamp the underground cable, and shearing the underground cable by a cutter blade 10 to complete clamping and shearing of the underground cable at one time, the whole construction process does not need drill pipe or oil pipe auxiliary operation, does not need to apply any other power at the well mouth, can stop the occurrence of underground cable residue to have adverse effect on fishing of the logging instrument, and fundamentally solves the technical problem of underground cable shearing in the prior art.
Example 2
A single-blade underground cable cutting device with energy storage power is shown in figures 7, 8 and 9 and comprises an upper connector 1, an impact rod 2, a conversion seat 3, a transmission sleeve 4, a slip seat 5, a split slip 6, a mandrel rod 7, a cutter seat 8, a lower connector 9, a cutter blade 10, a disc spring group 11, a slip spring 12, a cutter torsional spring 25, an upper thrust bearing 13, a lower thrust bearing 14, a supporting spring 18, a slip cylinder 15, a disc spring cylinder 16 and a cutter frame 26.
Wherein: in this embodiment, the structures of the upper joint 1, the impact rod 2, the transition seat 3, the transmission sleeve 4, the slip seat 5, the split slips 6, the mandrel rod 7, the lower joint 9, the disc spring set 11, the slip spring 12, the upper thrust bearing 13, the lower thrust bearing 14, the support spring 18, the slip cylinder 15 and the disc spring cylinder 16, and the matching relationship therebetween are the same as those of the dual-blade downhole cable shearing apparatus with energy storage power described in embodiment 1.
The cutter frame 26 is embedded on the lower end face of the core shaft rod 7 so as to simplify the structural process of the core shaft rod, a cutter frame groove is formed in the inner annular face and can rotate relative to the core shaft rod 7, the cutter blade 10 is embedded in the cutter frame groove formed in the cutter frame 26, the rotation track of the cutter blade 10 is limited, and the movement stability is enhanced.
An expanding cavity is formed in the lower joint 9, the cutter holder 8 is fixedly installed in the expanding cavity in a bolted connection mode, the lower end of the cutter blade 10 is hinged to the upper end of the cutter holder 8, the upper portion of the cutter blade is provided with a cutting edge facing the inner side, the cutter blade 10 can achieve the dynamic cutting function by rotating inwards with a hinged shaft as a center, an arc-shaped curved surface is arranged on the back side of the cutter blade, the cutter torsional spring 25 is installed on the cutter holder 8 and performs initial limiting on the cutter blade 10, and the arc-shaped curved surface on the back side of the cutter blade 10 abuts against the lower end of the core shaft rod 7 through the cutter holder 26; when the secondary energy storage power in the disc spring group 11 is released, the mandrel rod 7 overcomes the reaction force of the cutter torsion spring 25, the lower end of the mandrel rod acts on the arc-shaped curved surface of the back side of the cutter blade 10 through the cutter rest 26, and the cutter blade 10 is pushed to generate rotary motion towards the inner side by taking the hinge shaft as the center of a circle, so that an instantaneous dynamic cutting state is formed.
The operation method of the single-blade underground cable cutting device with the energy storage power in the embodiment is the same as that of the embodiment 1 in the well logging or testing process of a production well, when the single-blade underground cable cutting device with the energy storage power is conveyed to the connecting end of the cable and a well logging instrument, a weighting rod is then put into the underground along the cable to strike the impact rod 2, the energy storage power in the slip spring 12 and the disc spring group 11 is sequentially controlled and released through the transmission and conversion of impact mechanical energy, the split slips 6 are driven by the energy storage release power to clamp the underground cable, the cutter blade 10 carries out instantaneous dynamic cutting, the clamping and cutting of the underground cable are completed at one time, the auxiliary operation of a drill rod or an oil pipe is not needed, any other power is not needed to be applied to the well mouth, and the adverse influence of the underground cable residue on the fishing of the well logging instrument can be avoided, fundamentally has solved the cable shearing technology problem in the pit that exists among the prior art.
Claims (6)
1. A downhole wireline shearing device with stored energy power, comprising: the device comprises an upper joint (1), an impact rod (2), a conversion seat (3), a transmission sleeve (4), a slip seat (5), a split slip (6), a mandrel rod (7), a cutter seat (8), a lower joint (9), a cutter blade (10), a disc spring group (11), a slip spring (12), a cutter spring (17), and a slip cylinder (15) and a disc spring cylinder (16) which are combined to form an outer cylinder body;
the slip cylinder (15) and the disc spring cylinder (16) are connected up and down to form a split type outer cylinder body, 2 slip limiting grooves (20) are symmetrically arranged on the side wall of the slip cylinder (15) in the radial direction, the slip limiting groove (20) is arranged along the axial direction in a strip shape, the upper joint (1) is connected with the upper end of the slip cylinder (15), the lower joint (9) is connected with the lower end of the disc spring cylinder (16), the impact rod (2), the conversion seat (3), the transmission sleeve (4), the core shaft rod (7) and the cutter seat (8) are sequentially connected and arranged in the outer cylinder body from top to bottom, cable guide holes which are mutually connected and run through are respectively formed in the central axes of the upper joint (1), the impact rod (2), the conversion seat (3), the transmission sleeve (4), the core shaft rod (7), the cutter seat (8) and the lower joint (9);
the contact surface between the impact rod (2) and the conversion seat (3) is a spiral inclined surface which is matched with each other, the spiral inclined surfaces are in staggered matched contact with each other, the axial staggered height H is provided, and the outer side wall of the impact rod (2) is provided with an axial limiting groove;
the transmission sleeve (4) is a cylindrical sleeve body, the upper end of the transmission sleeve is fixedly connected to the lower end of the conversion seat (3), 2 vertical notches which are radially symmetrical are formed in the side wall of the transmission sleeve, 2L-shaped slotted holes (22) which are radially symmetrical with the vertical notches are formed in the positions which are alternated with the 2 vertical notches, the setting position of each L-shaped slotted hole (22) corresponds to the setting position of a slip limiting groove (20) on the slip cylinder (15), the slip seat (5), the split slips (6) and the slip spring (12) are sequentially accommodated in the transmission sleeve from bottom to top, the inner side of the slip seat (5) is provided with an inner conical surface, 2 outer convex lugs are radially symmetrical on the outer circumference and penetrate through the vertical notches formed in the corresponding sides of the transmission sleeve (4) and are respectively connected with the slip cylinder (15), and the slip seat (5) is fixed on the slip cylinder (15), the transmission sleeve (4) has a rotatable angle a relative to the slip seat (5), the split slip (6) is a cylinder structure formed by combining 2 arc slip sheets, 2 radially symmetrical slip pins (19) are arranged on the outer circumference, the slip pins (19) respectively penetrate through L-shaped slotted holes (22) formed in the corresponding sides of the transmission sleeve (4) in a matching way, and is inserted into a slip limiting groove (20) arranged on the slip cylinder (15) at the corresponding position, the lower end of the split slip (6) is provided with an outer conical surface which forms a structure corresponding to the inner conical surface on the slip seat (5), the slip spring (12) is arranged between the conversion seat (3) and the split slips (6) and is initially preset to be in a compression energy storage state, the split slips (6) are pushed inside the slip seat (5) under the action of the slip spring (12);
the upper end of the core shaft rod (7) is connected to the lower end of the transmission sleeve (4) in a limiting mode and extends downwards to enter the disc spring barrel (16), a double-lug boss is arranged at the lower end of the core shaft rod, a slotted shoulder matched with the double-lug boss in structure is arranged at the corresponding position of the disc spring barrel (16), the disc spring group (11) is sleeved on a rod body of the core shaft rod (7) and is supported between the core shaft rod (7) and the slip barrel (15) at the same time, elastic acting force is applied to the core shaft rod (7), and a compression energy storage state is preset initially;
the cutter is characterized in that an expanding cavity is formed in the lower connector (9), the cutter seats (8) are arranged in the expanding cavity, 1-2 cutting edges of the cutting blades (10) face inwards and are respectively installed on the cutter seats (8) in a hinged mode, the rotating freedom degree of the lower connector (9) is towards the central axis with the hinged shaft as the center, and the back side of the rotating freedom degree is a force bearing curved surface.
2. A downhole wireline shearing device with stored power as in claim 1 further comprising: the upper end of the diameter-expanding cavity formed in the lower joint (9) is provided with an annular conical surface, the cutter spring (17) is placed in the diameter-expanding cavity and supported at the bottom end of the cutter holder (8), so that the upper end of the cutter holder (8) is abutted against the lower end of the core shaft rod (7) to form stable contact connection with the core shaft rod (7), blade grooves penetrating through the side walls are respectively formed in two radially symmetrical sides of the cutter holder (8), 2 cutter blades (10) are respectively embedded in the 2 blade grooves and are respectively hinged to the cutter holder (8) at the upper ends, the lower parts of the 2 cutter blades (10) are respectively provided with opposite and mutually corresponding cutting edges, the cutting edges can be matched with each other to form a shearing structure, and the dynamic shearing function between the cutting edges can be realized by the matched rotation of the cutter blades (10) by taking a hinged shaft as the center, the back sides of the 2 cutting blades (10) are respectively provided with inclined surfaces, the inclined surfaces are integrally exposed out of the blade grooves from the side surfaces of the cutter seats (8), respectively correspond to the annular conical surface structures on the lower joint (9), and form matching contact.
3. A downhole wireline shearing device with stored power as in claim 1 further comprising: a cutter frame (26) is embedded on the lower end face of the core shaft rod (7), the cutter frame (26) can rotate relative to the core shaft rod (7), a cutter frame groove is formed in the inner annular face, and the cutter blade (10) is embedded in the cutter frame groove formed in the cutter frame (26) to limit the rotating track of the cutter blade (10);
meanwhile, the cutter seat (8) is fixedly arranged in the diameter-expanding cavity, the lower end of the cutter blade (10) is hinged to the upper end of the cutter seat (8), the upper portion of the cutter blade is provided with an inward-facing cutting edge, the cutter blade rotates inwards by taking a hinged shaft as a center to realize the dynamic cutting function of the cutter blade (10), an arc-shaped curved surface is arranged on the back side of the cutter seat, the cutter torsional spring (25) is arranged on the cutter seat (8) to perform initial limiting on the cutter blade (10), and the arc-shaped curved surface on the back side of the cutter blade (10) is enabled to be abutted against the lower end of the core shaft lever (7) through the cutter frame (26).
4. A downhole wireline shearing device with stored power as in any of claims 1-3, further comprising: the upper thrust bearing (13) is arranged between the transmission sleeve (4) and the slip cylinder (15), and the lower thrust bearing (14) is arranged between the disc spring group (11) and the core shaft rod (7).
5. A downhole cable shearing device with stored power according to claim 4, wherein a supporting spring (18) is arranged between the upper joint (1) and the impact rod (2).
6. The downhole wireline shearing device with stored power of claim 5, further comprising: the limiting connection mode of the rectangular pin groove structure is adopted between the core shaft rod (7) and the transmission sleeve (4), a rectangular pin is arranged at the upper end of the core shaft rod (7), a rectangular groove correspondingly matched with the rectangular pin structure is formed in the lower end of the transmission sleeve (4), and the rectangular pin is connected with the rectangular groove in a matched mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111491034.1A CN114059938B (en) | 2021-12-09 | Underground cable shearing device with energy storage power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111491034.1A CN114059938B (en) | 2021-12-09 | Underground cable shearing device with energy storage power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114059938A true CN114059938A (en) | 2022-02-18 |
| CN114059938B CN114059938B (en) | 2024-04-26 |
Family
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| CN115012849A (en) * | 2022-07-01 | 2022-09-06 | 西南石油大学 | Longitudinal-torsional composite control reducing stabilizer |
| CN115559683A (en) * | 2022-12-08 | 2023-01-03 | 易初机械装备有限公司 | Logging cable sealing suspension system |
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| CN106826961A (en) * | 2017-02-28 | 2017-06-13 | 重庆市江津区新航机械有限公司 | automatic continuous cutter |
| CN110894776A (en) * | 2019-10-12 | 2020-03-20 | 中国石油天然气集团有限公司 | Coiled tubing shearer and coiled tubing shearing method |
| CN210768678U (en) * | 2019-10-12 | 2020-06-16 | 中国石油天然气集团有限公司 | Coiled tubing seals circulation unfreezing device |
| CN216553805U (en) * | 2021-12-09 | 2022-05-17 | 北京天擎丽都科技有限公司 | Single-blade underground cable cutting device with energy storage power |
| CN216553804U (en) * | 2021-12-09 | 2022-05-17 | 北京天擎丽都科技有限公司 | Double-blade underground cable shearing device with energy storage power |
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| GB8500971D0 (en) * | 1984-01-20 | 1985-02-20 | Flopetrol Services Inc | Installing packers in well |
| CN2835532Y (en) * | 2005-11-29 | 2006-11-08 | 新疆石油管理局钻井工艺研究院 | Whipstock anchoring device |
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| CN115012849A (en) * | 2022-07-01 | 2022-09-06 | 西南石油大学 | Longitudinal-torsional composite control reducing stabilizer |
| CN115012849B (en) * | 2022-07-01 | 2023-10-10 | 西南石油大学 | Longitudinal-torsional composite control reducing stabilizer |
| CN115559683A (en) * | 2022-12-08 | 2023-01-03 | 易初机械装备有限公司 | Logging cable sealing suspension system |
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