CN215150554U - Pile leg cutting tool for deep water and structure below mud line - Google Patents
Pile leg cutting tool for deep water and structure below mud line Download PDFInfo
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- CN215150554U CN215150554U CN202022763519.9U CN202022763519U CN215150554U CN 215150554 U CN215150554 U CN 215150554U CN 202022763519 U CN202022763519 U CN 202022763519U CN 215150554 U CN215150554 U CN 215150554U
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Abstract
The utility model relates to the technical field of ocean engineering, in particular to a pile leg cutting tool for deep water and structures below a mud line, which comprises a drilling and grinding device and a rotary cutting device, wherein the drilling and grinding device comprises a drill bit driving piece and a drill bit connected below the drill bit driving piece; the rotary cutting device comprises an upper joint, an inner cylinder and a lower joint, the upper joint, the inner cylinder and the lower joint are sequentially connected, the outer cylinder is rotatably connected to the outer side of the inner cylinder, and a bearing is arranged between the inner cylinder and the outer cylinder; the drilling, grinding and cutting can be integrated by using the cutting tool, the cement of the pile leg can be removed by one-time lowering, and then the annular cutting operation of the pile leg is completed; the working efficiency is improved; the working cost is reduced, the noise is low, the oil gas explosion caused by sparks is avoided, and the back splash damage is avoided; the safety performance is high, and the safety of the working process is improved.
Description
Technical Field
The utility model relates to an ocean engineering technology field particularly, relates to a spud leg cutting means that is used for deep water and structure below the mud line.
Background
At present, the cutting operation of the pile leg of the cement structure under the abandoned deepwater and mud line is a complex and dangerous operation, the site of the operation is in the sea and is close to inflammable substances such as oil gas and the like, and serious accidents such as explosion or pollution and the like can be caused by carelessness. At present, the method mainly comprises a grinding high-pressure water jet cutting method, a diamond string bead wire sawing method and a rotary internal cutting knife method: (1) the pile leg is cut from the outside by the grinding high-pressure water jet method, the noise is high, the cutting radius is too large, grinding particles cannot directly pass through the pile leg at one time, the possibility of back splash exists, the danger is high, the price is high, and the operation below a mud line cannot be carried out; (2) the diamond string bead wire saw method is complex to operate, installation needs to be completed by an underwater robot, different diamond string bead curve saws need to be provided with special clamps and locks, and operation below a mud wire cannot be performed; (3) the internal cutting method is characterized in that accumulated mud in the structural member is cleaned before the structural pile leg is cut, so that the space can be cleared up and a cutting tool can be placed into the space.
Dredging of the sludge seems easier, not in practice, with respect to underwater cutting, offshore hoisting, transport, unloading placement. The reference indicates that during demolition of a platform at 100m depth, the operator considers mud cleaning to be the most difficult operation. The technical difficulties of this operation are: the depth of the mud pump for sucking mud is limited, and for the case of large depth, the underwater mud pump which is a technology with higher difficulty must be adopted; the mud accumulated in the pipe is generally hardened, and high-pressure water is needed to disperse and dilute the mud before sucking the mud, so that the difficulty of deepwater construction operation, configured equipment and cost are greatly improved; the accumulated mud is not all silt mixed with larger stones and impurities, and the mud pumping or pneumatic lifting method is effective but has low efficiency.
SUMMERY OF THE UTILITY MODEL
The main object of the utility model is to provide a spud leg cutting means for deep water and structure below the mud line to solve among the prior art that the cutting noise that traditional cutting method caused is big, the cutting radius is big, have danger such as anti-base and the expense is high, efficient low grade problem.
In order to achieve the above object, the utility model adopts the following technical scheme:
a pile leg cutting tool for deep water and structures below mud lines is detachably connected to a coiled tubing and comprises a drilling and grinding device and a rotary cutting device, wherein the drilling and grinding device is arranged below the rotary cutting device, and the rotary cutting device is detachably connected below the coiled tubing;
the drilling and grinding device comprises a drill bit driving piece and a drill bit connected below the drill bit driving piece; the drill bit driving piece comprises a screw stator short section and a screw rotor arranged inside the screw stator short section, a rotating cavity is formed in the screw stator short section, and the screw rotor rotates in the rotating cavity;
the rotary cutting device comprises a joint component and an outer cylinder which is rotatably connected to the outer side of the joint component, an annular gap is formed between the outer cylinder and the joint component, an injection pore channel is formed in the joint component and is communicated with a rotary cavity of the screw stator, a nozzle is arranged on the side wall of the outer cylinder, a balance channel and a communication hole are formed in the joint component, the communication hole and the balance channel are communicated with the annular gap, and the nozzle is communicated with the injection channel through the annular gap and the communication hole;
a sliding sleeve I and a sliding sleeve II are installed in the injection pore channel, and in an initial state, the sliding sleeve I is positioned on the inner side of the communicating hole through a shearing pin to plug the communicating hole; the sliding sleeve II is positioned on the inner side of the balance channel through a shearing pin to plug the balance channel; the connector assembly is also internally provided with a sliding sleeve seat I and a sliding sleeve seat II, the sliding sleeve seat I is positioned between the sliding sleeve I and the sliding sleeve II, the sliding sleeve seat II is positioned below the sliding sleeve II, and the diameter of an injection flow passage between the sliding sleeve seat I and the sliding sleeve seat II is smaller than that of an injection flow passage above the sliding sleeve seat I; the sliding sleeve I is also provided with a sliding sleeve hole, and after the sliding sleeve I falls on the sliding sleeve seat I, the sliding sleeve hole is communicated with the communicating hole.
Further, the joint component comprises an upper joint, an inner cylinder and a lower joint, the upper joint, the inner cylinder and the lower joint are sequentially connected, the outer cylinder is rotatably connected to the outer side of the inner cylinder, a bearing is arranged between the inner cylinder and the outer cylinder, and the communicating hole and the balance channel are located on the inner cylinder.
Furthermore, the outer walls of the upper joint and the lower joint are respectively provided with an anchoring hole, the hydraulic anchor is arranged in the anchoring holes, the anchoring holes in the upper joint are blocked by the sliding sleeve I in an initial state, and the anchoring holes in the lower joint are blocked by the sliding sleeve II.
Furthermore, a thrust short section is arranged below the screw stator short section, and an injection pore channel is arranged on the thrust short section.
Further, the injection hole channel comprises an upper injection hole channel with an upward outer opening and a lower injection hole channel with a downward outer opening.
Furthermore, the axis of the nozzle and the center point of the cross section of the cutting head form a certain eccentric distance.
Further, the internal diameter of sliding sleeve I is greater than the internal diameter of sliding sleeve II, and the below of sliding sleeve I and sliding sleeve II all has the ball seat.
The small steel ball directly reaches a ball seat of the sliding sleeve II after passing through the sliding sleeve I after being thrown in, the sliding sleeve II is driven to cut off the shear pin, and finally the small steel ball and the sliding sleeve II fall onto the sliding sleeve seat II together, and at the moment, the balance channel and an anchoring hole of the lower joint are opened; after the large steel ball is put into, the large steel ball falls on the ball seat of the sliding sleeve I, the sliding sleeve I is driven to cut off the shear pin and then falls on the sliding sleeve seat I, and the anchoring hole in the upper joint is opened at the moment.
A cutting method using the leg cutting tool, comprising the steps of:
s1: connecting the cutting tool to the lower end of a coiled tubing, putting the cutting tool into a leg to be cut, injecting fluid with certain pressure into an injection channel through the coiled tubing, and entering a rotating cavity of a screw stator short section to drive a screw rotor and a drill bit to rotate, wherein the fluid enters a thrust short section and is respectively ejected through an upper jet orifice channel and a lower jet orifice channel; the drill bit rotates to drill and remove cement in the pile leg, and after the cutting tool finishes the drilling and removing operation of the cement in the pile leg, the injection of fluid is stopped;
s2: after the cutting tool is lifted to the target cutting position of the pile leg to be cut, a small steel ball is put into the injection channel, fluid with certain pressure is pumped, when the small steel ball reaches the ball seat of the sliding sleeve II, pressure is continuously applied, the small steel ball drives the cutting shear pin of the sliding sleeve II to fall on the rear sliding sleeve seat II, and at the moment, the anchoring holes in the balance channel and the lower joint are opened;
s3: putting a large steel ball into the injection channel, allowing the large steel ball to fall onto a ball seat of the sliding sleeve I under the action of pressure, continuously pressurizing, cutting off the shear pin by the sliding sleeve I, allowing the sliding sleeve I and the large steel ball to fall onto the sliding sleeve seat I together, opening an anchoring hole of the upper joint at the moment, communicating the sliding sleeve hole in the sliding sleeve I with a communicating hole, and communicating the nozzle with the injection channel;
s4: under the action of pressure in the pipe, tooth claws on hydraulic anchors on the upper joint and the lower joint are opened, claw teeth of the hydraulic anchors are expanded and anchored on the inner wall of the pile leg, and a cutting tool is fixed;
s5: injecting sand mixing liquid into the injection channel, jetting high-pressure jet from a nozzle, cutting the pile leg to be cut by means of jet impact force, and driving the outer cylinder to rotate relative to the inner cylinder by means of the reaction force of the jet impact force so as to realize complete circumferential cutting of the outer wall of the pile leg to be cut;
s6: the leg cutting tool is removed and the cut legs are removed.
The utility model discloses following beneficial effect has:
(1) the thrust nipple is provided with an upper spray orifice channel and a lower spray orifice channel, and fluid is sprayed out through the lower spray orifice channel, so that a certain spraying and mud breaking effect can be achieved on cement, and a certain upward returning effect can be achieved on abrasive dust generated by drilling and grinding the cement; the fluid sprayed out of the upper spraying channel hole has certain upward returning effect on abrasive dust generated by drilling and grinding cement, and the reaction force caused by spraying can bring certain backward thrust to the drill bit, so that certain drilling pressure is provided for the drill bit, and cement drilling removal operation inside the pile leg is performed.
(2) Drilling, grinding and cutting are integrated, two operations of removing cement and cutting the pile leg can be completed by putting the pile leg into one cutting operation, the cement of the pile leg is not required to be removed firstly, and then a cutting tool is put into the pile leg to perform the cutting operation; the working efficiency is improved; the working cost is reduced.
(3) The inner part of the pile leg is cut by water power, so that the noise is low, oil gas explosion caused by sparks is avoided, and back splash damage is avoided; the safety performance is high, and the safety of the working process is improved.
Drawings
FIG. 1 is a schematic view of the structure of the working state of the present invention;
FIG. 2 is a schematic view of the structure of the drilling and grinding device;
FIG. 3 is a schematic view of the rotary cutting apparatus in an initial state;
FIG. 4 is a schematic structural view of the present invention when a small steel ball is put in;
FIG. 5 is a schematic structural view of the present invention after the small steel balls are dropped;
FIG. 6 is a schematic structural view of the present invention when a large steel ball is put in;
FIG. 7 is a schematic structural view of the present invention after a large steel ball is dropped;
FIG. 8 is a schematic view of a nozzle arrangement;
in the figure: 1. a drill bit; 2. a thrust nipple; 21. an upper spraying hole channel; 22. a lower spray channel; 3. a screw stator nipple; 4. a screw rotor; 5. a lower joint; 51. a sliding sleeve seat II; 6. an outer cylinder; 61. a bearing; 62. a nozzle; 7. an inner barrel; 71. a balancing channel; 72. a communicating hole; 73. a sliding sleeve seat I; 8. an upper joint; 9. a coiled tubing; 10. a sliding sleeve II; 11. a sliding sleeve I; 111. a sliding sleeve hole; 12. a hydraulic anchor; 13. a small steel ball; 14. a large steel ball.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1-8, a spud leg cutting instrument for deep water and structure below mud line include bores and grinds device and rotatory cutting device, bore and grind the device and install in rotatory cutting device below, rotatory cutting device can dismantle the connection in the coiled tubing below, through coiled tubing with this cutting instrument put deep water and the spud leg inside of the structure below the mud line, that bores earlier and grinds the inside cement of prefilling of spud leg that the device grinds, the rotatory cutting device of reuse cuts the spud leg down.
The drilling and grinding device comprises a drill bit driving piece and a drill bit 1 connected below the drill bit driving piece; the drill bit driving piece comprises a screw stator short section 3 and a screw rotor 4 arranged inside the screw stator short section, a rotating cavity is formed in the screw stator short section, and the screw rotor rotates in the rotating cavity; the coiled tubing is communicated with the screw stator short section through the rotary cutting device, high-pressure fluid is injected into the screw stator short section through the coiled tubing, and the high-pressure fluid drives the screw rotor to rotate in the rotary cavity when passing through the rotary cavity.
The lower part of the screw stator short section is also provided with a thrust short section 2, the thrust short section is provided with a jet pore passage, the jet pore passage comprises an upper jet pore passage 21 with an upward outer opening and a lower jet pore passage 22 with a downward outer opening, high-pressure fluid is jetted from an upper jet passage port and a lower jet passage port after passing through a rotary cavity, the fluid jetted from the upper jet passage port has certain upward return effect on abrasive dust generated by drilling and grinding cement on the one hand, reaction force brought by jetting can bring certain backward thrust to a drill bit to provide certain drill pressure for the drill bit, cement drilling and removing operation inside a pile leg is carried out, the fluid jetted from the lower jet passage port has certain jetting and mud breaking effect on the cement, and certain upward return effect on the abrasive dust generated by drilling and grinding the cement can be generated.
The rotary cutting device comprises a joint component and an outer cylinder 6 which is rotatably connected to the outer side of the joint component, an injection pore channel is arranged in the joint component, the joint component comprises an upper joint 8, an inner cylinder 7 and a lower joint 5, the upper joint, the inner cylinder and the lower joint are sequentially connected, the outer cylinder is rotatably connected to the outer side of the inner cylinder, a bearing 61 is arranged between the inner cylinder and the outer cylinder, an annular gap is formed between the outer cylinder and the inner cylinder, the injection pore channel is communicated with a rotary cavity of the screw stator, a nozzle 62 is arranged on the side wall of the outer cylinder, a balance channel 71 and a communication hole 72 are arranged on the inner cylinder, the communication hole and the balance channel are both communicated with the annular gap, and the nozzle is communicated with the injection channel through the annular gap and the communication hole; the axis of the nozzle and the center point of the cross section of the cutting head form a certain eccentric distance.
A sliding sleeve I11 and a sliding sleeve II 10 are installed in the injection pore channel, and in an initial state, the sliding sleeve I is positioned on the inner side of the communicating hole through a shearing pin to plug the communicating hole; the sliding sleeve II is positioned on the inner side of the balance channel through a shearing pin to plug the balance channel; the connector assembly is also internally provided with a sliding sleeve seat I73 and a sliding sleeve seat II 51, the sliding sleeve seat I is positioned between the sliding sleeve I and the sliding sleeve II, the sliding sleeve seat II is positioned below the sliding sleeve II, and the diameter of an injection flow passage between the sliding sleeve seat I and the sliding sleeve seat II is smaller than that of an injection flow passage above the sliding sleeve seat I; the sliding sleeve I is also provided with a sliding sleeve hole 111, and after the sliding sleeve I falls on the sliding sleeve seat I, the sliding sleeve hole is communicated with the communicating hole. The internal diameter of sliding sleeve I is greater than the internal diameter of sliding sleeve II, and the below of sliding sleeve I and sliding sleeve II all has the ball seat, and after big steel ball and tiny steel ball fell into injection channel, on falling the ball seat of sliding sleeve I and sliding sleeve II respectively, and then drive sliding sleeve I and II downward movements of sliding sleeve.
The outer walls of the upper joint and the lower joint are respectively provided with an anchoring hole, a hydraulic anchor 12 is arranged in the anchoring holes, the anchoring holes in the upper joint are blocked by a sliding sleeve I in an initial state, the anchoring holes in the lower joint are blocked by a sliding sleeve II, the cutting tool further comprises a large steel ball 14 and a small steel ball 13, after the drilling and grinding of cement in the leg to be cut are completed by a drill bit, the cutting tool is lifted to the target cutting position of the leg to be cut, and the small steel ball is thrown into an injection channel; after the small steel balls are put into the sliding sleeve I, the small steel balls directly reach the ball seat of the sliding sleeve II to drive the sliding sleeve II to cut off the shear pin, and finally the small steel balls and the sliding sleeve II fall onto the sliding sleeve seat II together, and at the moment, the balance channel and the anchoring hole of the lower joint are opened; after the large steel ball is put into, fall on the ball seat of sliding sleeve I, drive sliding sleeve I and cut off and fall on sliding sleeve seat I together after the shear pin, the anchoring hole on the top connection is opened this moment, and under the effect of continuous pressure, the claw on the water conservancy anchor in the anchoring hole is opened, and the anchoring is at the spud leg inner wall.
The utility model discloses a use as follows:
the cement drilling and removing process comprises the following steps: the cutting tool is lowered into the pile leg through the continuous pipe, fluid with certain pressure is injected into the injection channel through the continuous oil pipe through the high-pressure pump, when the fluid passes through a gap between the screw rotor and the screw stator short section, the gap space is continuously changed under the action of hydraulic force to drive the screw rotor to rotate, the hydraulic pressure is higher, the rotating speed is higher, the screw rotor drives the drill bit to rotate, the fluid enters an inner cavity of the thrust short section after passing through the gap between the screw rotor and the screw stator short section and respectively enters an annular space between the cutting tool and the pile leg through an upper spraying hole channel and a lower spraying hole channel, the fluid is sprayed out through the lower spraying hole channel, the cement can be subjected to certain spraying and mud breaking effects, and certain upward returning effects can be generated on grinding chips generated by drilling and grinding the cement; the drilling and grinding cement is sprayed out through the upper spraying hole, on one hand, certain upward returning effect is generated on grinding chips generated by drilling and grinding cement, on the other hand, reaction force caused by spraying can bring certain backward thrust to the drill bit, certain drilling pressure is provided for the drill bit, the cement drilling and removing operation inside the pile leg is carried out, and after the cement drilling and removing operation inside the pile leg is completed through the tool, the injection of high-pressure water is stopped.
The small steel ball input process: and lifting the cutting tool to a specified cutting position, putting the small steel balls into the coiled tubing, pumping fluid with certain pressure into the high-pressure pump, conveying the small steel balls to the ball seat of the sliding sleeve II, continuously pressurizing the high-pressure pump, shearing the shear pin by the sliding sleeve II under the action of water pressure, and sliding the sliding sleeve II to the sliding sleeve seat II, wherein at the moment, the balance channel and the hydraulic anchoring hole of the lower joint are opened.
The large steel ball input process: the large steel ball is thrown into the coiled tubing from the coiled tubing, and similarly falls onto the ball seat of the sliding sleeve I under the hydraulic action, the high-pressure pump continues to pressurize, the sliding sleeve I shears the shear pin under the hydraulic action and slides onto the sliding sleeve seat I, at the moment, the hydraulic anchoring hole of the upper joint is opened, the sliding sleeve hole in the sliding sleeve I is communicated with the communicating hole, and the sliding sleeve hole, the communicating hole, the annular gap and the balance channel are communicated with each other, so that the pressures of the injection channels above and below the large steel ball are kept consistent.
After the coiled tubing is pressurized, under the action of pressure in the tubing, the hydraulic anchors on the upper joint and the lower joint are opened, the claws of the hydraulic anchors are expanded and anchored on the inner wall of the pile leg, and the hydraulic anchors can prevent the torque of the rotary sand blasting cutter from uploading to damage the coiled tubing except for ensuring that the cutting tool is placed in the middle and play a role in positioning the cutter.
The rotary cutting device works: use the high-pressure jet that mixes the sand liquid as fluid to pour into from coiled tubing to from the nozzle blowout, rely on the efflux impact force will wait to cut the tubular column and cut open, the reaction force of efflux impact force simultaneously, with the eccentricity of nozzle axis and cutting head cross section central point formation, to the certain moment of torsion of outer tube formation, because urceolus and inner tube are connected for the bearing, consequently, under the promotion of the reaction force moment of torsion of efflux impact force, the relative inner tube of urceolus rotates, the circumference that the realization waited to cut the tubular column is cut completely.
And after the cutting is finished, stopping injecting the high-pressure jet flow, taking out the whole cutting tool, and taking out the cut pile leg to finish the whole cutting work.
In the description of the present invention, it should be noted that the terms "front end", "rear end", "left and right", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.
Claims (8)
1. A pile leg cutting tool for deep water and structures below a mud line is detachably connected to a coiled tubing (9), and is characterized by comprising a drilling and grinding device and a rotary cutting device, wherein the drilling and grinding device is arranged below the rotary cutting device, and the rotary cutting device is detachably connected below the coiled tubing (9);
the drilling and grinding device comprises a drill bit driving piece and a drill bit (1) connected below the drill bit driving piece; the drill driving piece comprises a screw stator short section (3) and a screw rotor (4) arranged inside the screw stator short section, a rotary cavity is formed in the screw stator short section, and the screw rotor (4) rotates in the rotary cavity;
the rotary cutting device comprises a joint component and an outer cylinder (6) which is rotatably connected to the outer side of the joint component, an annular gap is formed between the outer cylinder (6) and the joint component, an injection hole channel is formed in the joint component and is communicated with a rotary cavity of the screw stator, a nozzle (62) is arranged on the side wall of the outer cylinder (6), a balance channel (71) and a communication hole (72) are formed in the joint component, the communication hole (72) and the balance channel (71) are communicated with the annular gap, and the nozzle (62) is communicated with the injection channel through the annular gap and the communication hole (72);
a sliding sleeve I (11) and a sliding sleeve II (10) are installed in the injection pore channel, and in an initial state, the sliding sleeve I (11) is positioned on the inner side of the communicating hole (72) through a shearing pin to plug the communicating hole (72); the sliding sleeve II (10) is positioned on the inner side of the balance channel (71) through a shearing pin to plug the balance channel (71); the connector assembly is internally provided with a sliding sleeve seat I (73) and a sliding sleeve seat II (51), the sliding sleeve seat I (73) is positioned between the sliding sleeve I (11) and the sliding sleeve II (10), the sliding sleeve seat II (51) is positioned below the sliding sleeve II (10), and the diameter of an injection flow passage between the sliding sleeve seat I (73) and the sliding sleeve seat II (51) is smaller than that of an injection flow passage above the sliding sleeve seat I (73); the sliding sleeve I (11) is also provided with a sliding sleeve hole (111), and after the sliding sleeve I (11) falls on the sliding sleeve seat I (73), the sliding sleeve hole (111) is communicated with the communicating hole (72).
2. The pile leg cutting tool for deep water and structures below mud lines as claimed in claim 1, wherein the joint assembly comprises an upper joint (8), an inner cylinder (7) and a lower joint (5), the upper joint (8), the inner cylinder (7) and the lower joint (5) are connected in sequence, the outer cylinder (6) is rotatably connected to the outer side of the inner cylinder (7), a bearing (61) is installed between the inner cylinder (7) and the outer cylinder (6), and the communication hole (72) and the balance channel (71) are both located on the inner cylinder (7).
3. The leg cutting tool for deep water and structures below mud line according to claim 1, wherein the outer walls of the upper joint (8) and the lower joint (5) are provided with anchoring holes, respectively, and the hydraulic anchor (12) is installed in the anchoring holes, and in the initial state, the anchoring holes of the upper joint (8) are blocked by the sliding sleeve I (11), and the anchoring holes of the lower joint (5) are blocked by the sliding sleeve II (10).
4. The pile leg cutting tool for deep water and structures below mud lines as claimed in claim 1, wherein the screw stator short section (3) is further provided with a thrust short section (2) below, and the thrust short section (2) is provided with a jet channel.
5. The leg cutting tool for deep water and structures below mudline according to claim 4, characterized in that the jet channel comprises an upper jet channel (21) with an upward opening on the outside and a lower jet channel (22) with a downward opening on the outside.
6. The leg cutting tool for deep water and structures below mudline according to claim 1, characterized in that the axis of the nozzle (62) is eccentric from the center point of the cross-section of the cutting head.
7. The pile leg cutting tool for deep water and structures below mud lines as claimed in claim 3, wherein the inner diameter of the sliding sleeve I (11) is larger than the inner diameter of the sliding sleeve II (10), and ball seats are arranged below the sliding sleeve I (11) and the sliding sleeve II (10).
8. The leg cutting tool for deep water and structures below mudline according to claim 7, characterized by further comprising large (14) and small (13) steel balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022763519.9U CN215150554U (en) | 2020-11-25 | 2020-11-25 | Pile leg cutting tool for deep water and structure below mud line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022763519.9U CN215150554U (en) | 2020-11-25 | 2020-11-25 | Pile leg cutting tool for deep water and structure below mud line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215150554U true CN215150554U (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022763519.9U Active CN215150554U (en) | 2020-11-25 | 2020-11-25 | Pile leg cutting tool for deep water and structure below mud line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215150554U (en) |
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