CN112112588A - Press-in type rope coring drilling tool and coring process method thereof - Google Patents
Press-in type rope coring drilling tool and coring process method thereof Download PDFInfo
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- CN112112588A CN112112588A CN202010936162.1A CN202010936162A CN112112588A CN 112112588 A CN112112588 A CN 112112588A CN 202010936162 A CN202010936162 A CN 202010936162A CN 112112588 A CN112112588 A CN 112112588A
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- 238000005553 drilling Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 239000011435 rock Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims description 16
- 239000000725 suspension Substances 0.000 claims description 13
- 238000010408 sweeping Methods 0.000 claims description 9
- 241001449342 Chlorocrambe hastata Species 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000013535 sea water Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 description 8
- 230000002512 anti-withdrawal effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/18—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being specially adapted for operation under water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A press-in rope coring drilling tool and its coring technique, its press-in rope coring drilling tool includes outer assembly and inner assembly, while coring, the inner assembly is put into outer assembly, form the annular structure between outer assembly and the inner assembly; a seat ring and a sealing outer pipe are arranged in the outer assembly, and a pressure relief groove is formed in the lower part of the sealing outer pipe; the inner assembly is provided with a fixed part and a piston type moving part sleeved outside the fixed part, during coring operation, high-pressure slurry is injected into an annular structure formed between the inner assembly and the outer assembly through a water pump arranged on a drilling platform surface, the piston type moving part is pushed by slurry pressure to shear a pin shaft and then move downwards, so that an inner drill bit is flushed into a weak stratum, and a rock core is obtained in an inner pipe assembly. According to the invention, through the optimized design of the rope core drilling tool structure, a process method for obtaining the core of the weak stratum in a piston pressing mode is innovated, and the purposes of improving the core collecting quality and the core collecting rate are achieved.
Description
Technical Field
The invention relates to a rope coring drilling tool and a coring process method thereof, in particular to a press-in type rope coring drilling tool suitable for a weak stratum and a coring process method thereof.
Background
The drilling coring is a technology of drilling holes in a stratum through drilling equipment and a drilling tool and obtaining a rock core, and the currently common drilling coring method is rotary drilling, namely, the drilling machine drives the drilling tool to rotate by a top drive, and the stratum at the bottom of the hole is ground and scribed through a drill bit. In the drilling process, the temperature of the drill bit is reduced through the circulation of the drilling fluid, rock debris is carried out of the drilled hole, and meanwhile, the core pillar gradually enters the core tube until the drilling process is finished.
Because the existing drilling method is designed aiming at rock stratums and is not suitable for drilling and coring operation in weak stratums such as silt, silt and the like with high superficial water content in oceans and rivers and lakes, when coring is carried out on the weak stratums, the stratum structure in a rock core can be changed due to the rotation disturbance of a drill bit, the rock core is easy to be washed by circulating drilling fluid, and the obtained rock core has the problems of large disturbance, low coring quality, unqualified rock core taking rate and the like when approaching the end point. Particularly in geological exploration of shallow regions of the ocean, the core taking rate often does not reach the standard, so that the missing strata are more, and the coring task cannot be completed. In summary, the core drilling method of the rotary drilling with mud circulation has serious damage to the core of the weak stratum, and is difficult to be applied to the core drilling process of shallow surface layer in the ocean and the rivers and lakes.
Disclosure of Invention
The invention provides a press-in type rope coring drilling tool and a coring technological method thereof, and aims to achieve the purpose of improving the rock core sampling quality and the rock core sampling rate by optimally designing the structure of the rope coring drilling tool and matching a piston press-in mode to obtain a soft stratum rock core.
In order to achieve the purpose, the invention adopts the following technical scheme:
a press-in type rope coring drilling tool comprises an outer assembly and an inner assembly, wherein during coring operation, the inner assembly is arranged in the outer assembly, and an annular structure is formed between the inner assembly and the outer assembly; a seat ring and a sealing outer pipe are arranged in the outer assembly, and a pressure relief groove is formed in the lower part of the sealing outer pipe; the inner assembly is provided with a fixed part and a piston type moving part sleeved outside the fixed part, the fixed part comprises a fishing spear head component, a suspension ring, a connecting shaft and a mandrel, the fishing spear head component is connected with the mandrel through the connecting shaft, a suspension ring is sleeved on the connecting shaft, the inner assembly is carried on a seat ring of the outer assembly through the suspension ring, the piston type moving part is fixed on the connecting shaft through a pin shaft before coring operation, a flange piston tightly attached to the sealed outer tube in the outer assembly is arranged in the piston type moving part, an inner drill bit is arranged at the lower end of the piston type moving part, when coring operation is carried out, high-pressure mud is injected into an annular structure between the inner assembly and the outer assembly through a water pump arranged on the drilling platform surface, the piston type moving component is pushed by mud pressure to shear the pin shaft and then move downwards, so that the inner drill bit is flushed into a weak stratum and a rock core is obtained in the inner pipe component.
The above-mentioned press-in type wire core drill, the said piston type kinematic unit includes the piston assembly, inner tube assembly and inner bit; the piston assembly comprises a flange piston, a piston seat, a sliding ring sleeve, a semi-sliding ring and a shear pin sleeve, the semi-sliding ring, the sliding ring sleeve and the piston seat are sequentially connected from top to bottom, sealing pieces are arranged on the inner walls of the sliding ring sleeve and the piston seat, a pin shaft hole is formed in the shear pin sleeve, a pin shaft is arranged in the pin shaft hole and penetrates through a connecting shaft, and the flange piston is embedded between the piston seat and the sliding ring sleeve; an inner tube assembly and an inner drill bit are mounted below the piston assembly.
The core shaft comprises an upper core shaft and a lower core shaft, a clamping groove is formed in the connecting position of the upper core shaft and the lower core shaft, and a liner tube piston is arranged at the lower end of the lower core shaft.
Above-mentioned forced rope coring drilling tool, piston assembly still is equipped with prevents moving back the mechanism, prevent moving back the mechanism including preventing moving back key and torsional spring, prevent moving back key bilateral symmetry and arrange two sets ofly to articulated mode and shear pin cover assembly to at shear pin cover and prevent moving back installation torsional spring between the key articulated shaft, after the operation of coring is accomplished, carry on spacingly through preventing moving back the key and the cooperation of last dabber, lower dabber hub connection position draw-in groove to piston assembly.
In the press-in type rope coring drilling tool, the piston type moving part is further provided with a quick disassembling mechanism, the quick disassembling mechanism comprises a quick disassembling inner sleeve and a quick disassembling outer sleeve which are matched with each other, wherein the upper end of the quick disassembling inner sleeve is assembled with a piston seat of the piston assembly, and the lower end of the quick disassembling outer sleeve is assembled with the inner pipe assembly.
In the above-mentioned press-in type wire line core drill, the inner pipe assembly comprises a pressure relief joint, an inner pipe and a transparent PC liner pipe; the upper end of the inner pipe is connected with the quick-release outer sleeve through a pressure relief joint, the lower end of the inner pipe is connected with the inner drill bit, and the transparent PC bushing is embedded in the inner pipe and the inner drill bit cavity.
According to the press-in type rope coring drilling tool, the side wall of the pressure relief joint is provided with the large pressure relief hole, the side wall of the quick-release outer sleeve is provided with the small pressure relief hole, and the control of the movement speed of the piston type movement part when the piston type movement part approaches the end point is realized through the cooperation of the large pressure relief hole, the small pressure relief hole and the liner tube piston arranged at the lower end of the lower mandrel.
A press-in type rope coring process method adopts the press-in type rope coring drilling tool to realize drilling coring operation of a weak stratum, and comprises the following operation steps:
a. after the last core-taking operation is finished, hole sweeping is carried out, the drilling tool is lifted to a certain distance away from the bottom of the hole, the drilling rod column is fixed on the surface of a drilling platform through the hole opening clamper, and the top drive is matched with the fisher to lift the assembled inner assembly and place the inner assembly into the drilling rod from the hole opening;
b. lowering the inner assembly into the outer assembly by using a wire line coring winch, pressing the inner assembly suspension ring on the outer assembly seat ring, and slightly releasing a wire rope of the coring winch to prevent the wire rope from being in a tight state;
c. closing a rubber plug of a center hole of a top drive water faucet, enabling the rubber plug to extrude a rope coring steel wire rope, opening a lifting compensation system of the top drive, putting down a drilling tool by the top drive under the cooperation of a rope coring winch, and clamping and fixing a drill column by a seabed base plate clamp;
d. the pump is started to supply water, the flange piston in the inner assembly generates downward thrust under the action of slurry pressure, the pin shaft is cut off through the shearing pin sleeve, the inner pipe is driven to be punched downwards, the inner drill bit enters a weak stratum to obtain a core sample, when the flange piston moves to the position of the pressure relief groove of the sealed outer pipe, the slurry pressure is reduced, and the repeated coring process is finished;
e. opening a seabed base disc clamp holder, lifting a top drive and a drilling tool, driving an inner pipe which is flushed into the stratum to leave the bottom of a hole under the drive of a seat ring in an outer assembly, opening a plug of a center hole of a top drive faucet, and lifting the inner assembly through a rope coring winch;
f. the orifice gripper fixes the drill rod column on the drilling platform surface, unloads the connection of the top drive and the drill rod column, places the inner assembly lifted to the orifice on the backing plate of the orifice, then divides the inner assembly into an upper part and a lower part through the inner assembly quick-dismantling mechanism, respectively takes out the upper part and the lower part by using a fisher, and then draws out the transparent PC liner tube in the inner tube to complete one-time coring operation;
g. and reassembling the inner assembly for standby, connecting the top drive with the drill column to perform hole sweeping, sweeping the part of the drilled hole where the core is obtained, and repeating the steps to enter the next working cycle.
In the step c, after the drilling tool is lowered to the position where the outer drill bit contacts the bottom of the drilling hole, the sea heave height is continuously lowered, then the seabed base disc is operated, and the drill string is clamped and fixed through the seabed base disc clamp.
In the step d, when the inner pipe assembly starts coring, seawater entering between the mandrel and the inner pipe is discharged through the large pressure relief hole of the pressure relief joint, when the piston type operation part moves to the end of the stroke under the pushing of slurry, the liner pipe piston covers the large pressure relief hole, the large pressure relief hole fails, the small pressure relief hole in the quick-release outer sleeve continues to be filled with water for pressure relief, so that the pressure difference between the upper part and the lower part of the flange piston is controlled, and the impact between the liner pipe piston and the quick-release inner sleeve caused by the over-high speed of the piston type operation part is avoided.
The press-in type rope coring drilling tool seals the flange piston, the sealing outer pipe and the core shaft to form a sealing cavity similar to an oil cylinder, so that an inner assembly of the drilling tool can be pushed by mud pressure to press an inner drill bit into a stratum to obtain a core; the press-in type rope coring drilling tool also comprises a quick dismounting mechanism arranged in the inner assembly, so that the inner assembly can be quickly dismounted and assembled at the orifice, the dismounting operation difficulty is reduced, the requirement on the clearance height of equipment is lowered, and the labor intensity of an operator is also reduced. Compared with the traditional rotary drilling and percussion drilling process methods, the press-in type rope coring process method has the advantages that the inner pipe is directly pressed into the stratum, and the influence of the slurry action on the core is avoided in a manner of pressing in advance, so that the core protection effect is excellent, and the press-in type rope coring process method has a good using effect particularly on soft strata such as seabed silt. Therefore, the invention creates a process method for obtaining the core of the weak stratum in a piston pressing mode through the optimized design of the structure of the rope core drilling tool, and achieves the purpose of improving the core collecting quality and the core collecting rate.
Drawings
FIG. 1 is a schematic view of the overall structure of a press-in wire line core drill;
FIG. 2 is a schematic view of the outer assembly of the press-in wireline core drill;
FIG. 3 is an enlarged view at A in FIG. 2;
FIG. 4 is a schematic view of the inner assembly structure of the press-in wireline core drill;
FIG. 5 is a schematic view of a stationary component of the inner assembly of the press-in wireline core drill;
FIG. 6 is a schematic illustration of the piston type moving parts in the inner assembly of the press-in wireline coring tool;
FIGS. 7 and 8 are schematic views showing the movement of the piston-type moving part in the inner assembly of the press-in wire-line core drill;
FIG. 9 is an enlarged view of the structure at B in FIG. 8;
FIG. 10 is a schematic view of a press-in wireline core drill coring process.
The list of labels in the figure is:
1. 1-1 parts of an outer assembly, 1-2 parts of a seat ring, 1-3 parts of a sealing outer pipe, 1-4 parts of a pressure relief groove and an outer drill bit;
2. inner assembly
I, fixing part
2-1, a spearhead fishing component 2-2, a suspension ring 2-3, a connecting shaft 2-4, an upper mandrel 2-5, a lower mandrel 2-6, a liner piston,
II, piston type moving part
2-7 parts of shear pin sleeves, 2-7-1 parts of pin shaft holes, 2-8 parts of baffle rings, 2-9 parts of torsion springs, 2-10 parts of anti-back keys, 2-11 parts of semi-slip rings, 2-12 parts of slip ring sleeves, 2-13 parts of flange pistons, 2-14 parts of piston seats, 2-15 parts of quick-release inner sleeves, 2-16 parts of quick-release outer sleeves, 2-16-1 parts of small pressure release holes, 2-17 parts of hydraulic connectors, 2-17-1 parts of large pressure release holes, 2-18 parts of inner pipes, 2-19 parts of transparent PC (polycarbonate) bushings, 2-20 parts of inner drill bits, 2-21 parts of sealing elements;
III, a pin shaft
3. An annular structure; 4. A faucet; 5. Top drive; 6. A wire rope; 7. Drilling a table surface; 8. a subsea template holder; 9. Drilling; 10. A rope coring winch.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Referring to fig. 1, the press-in wireline core drill according to the invention comprises an outer assembly 1 and an inner assembly 2, the inner assembly 2 being arranged in the outer assembly 1 during the core operation, an annular structure 3 being formed between the inner assembly 2 and the outer assembly 1.
Referring to fig. 2 and 3, the press-in type wire line core drill according to the present invention has a seat ring 1-1 and a sealing outer tube 1-2 in an outer assembly 1, a pressure relief groove 1-3 at a lower portion of the sealing outer tube 1-2, and an outer drill bit at a bottom of the outer assembly 1.
Referring to fig. 4, the inner assembly 2 of the press-in type wire line core drill of the present invention is provided with a fixed part i and a piston type moving part ii sleeved outside the fixed part i, and the piston type moving part ii is fixed on the fixed part i by a pin shaft iii before core drilling.
Referring to fig. 5, a fixing part I of the press-in type wire line core drill comprises a fishing spear head assembly 2-1, a suspension ring 2-2, a connecting shaft 2-3 and a mandrel, wherein the fishing spear head assembly 2-1 is connected with the mandrel through the connecting shaft 2-3, the suspension ring 2-2 is sleeved on the connecting shaft 2-3, and an inner assembly 2 is carried on a seat ring 1-1 of the outer assembly 1 through the suspension ring 2-2; the mandrel comprises an upper mandrel 2-4 and a lower mandrel 2-5, a clamping groove is arranged at the connecting part of the upper mandrel 2-4 and the lower mandrel 2-5, and a liner tube piston 2-6 is arranged at the lower end of the lower mandrel 2-5.
Referring to fig. 6, the piston type moving part ii of the press-in type wire line core drill of the present invention comprises a piston assembly, a quick release mechanism, an inner pipe assembly and inner drill bits 2 to 20; the piston assembly comprises flange pistons 2-13, piston seats 2-14, sliding ring sleeves 2-12, semi-sliding rings 2-11, shear pin sleeves 2-7 and anti-withdrawal mechanisms, the shear pin sleeves 2-7, the semi-sliding rings 2-11, the sliding ring sleeves 2-12 and the piston seats 2-14 are sequentially connected from top to bottom, sealing elements 2-21 are arranged on the inner walls of the sliding ring sleeves 2-12 and the piston seats 2-14, pin shaft holes 2-7-1 are arranged on the shear pin sleeves 2-7, pin shafts III are arranged in the pin shaft holes 2-7-1 and penetrate through connecting shafts 2-3, the flange pistons 2-13 are embedded between the piston seats 2-14 and the sliding ring sleeves 2-12, the anti-withdrawal mechanisms comprise anti-withdrawal keys 2-10 and torsion springs 2-9, the anti-withdrawal keys 2-10 are symmetrically arranged in two groups, the pin is assembled with the pin sleeve 2-7 in a hinged mode, and a torsion spring 2-9 is arranged between the pin sleeve 2-7 and the hinged shaft of the anti-retreat key 2-10; the quick disassembling mechanism comprises a quick disassembling inner sleeve 2-15 and a quick disassembling outer sleeve 2-16 which are matched with each other, wherein the upper end of the quick disassembling inner sleeve 2-15 is assembled with a piston seat 2-14 of a piston assembly, the lower end of the quick disassembling outer sleeve 2-16 is assembled with an inner pipe assembly, and a small pressure relief hole 2-16-1 is arranged on the side wall of the quick disassembling outer sleeve 2-16; the inner pipe assembly comprises a pressure relief connector 2-17, an inner pipe 2-18 and a transparent PC liner pipe 2-19, the upper end of the inner pipe 2-18 is connected with a quick-release outer sleeve 2-16 through the pressure relief connector 2-17, the lower end of the inner pipe is connected with an inner drill bit 2-20, a large pressure relief hole 2-17-1 is formed in the side wall of the pressure relief connector 2-17, and the transparent PC liner pipe 2-19 is embedded in the inner cavities of the inner pipe 2-18 and the inner drill bit 2-20.
Referring to fig. 7, 8 and 9, in the press-in type wire line core drill tool, during core drilling operation, high-pressure slurry is injected into an annular structure 3 formed between an inner assembly 2 and an outer assembly 1 by a water pump, a piston type moving part II is pushed by slurry pressure to cut off a pin shaft III and then move downwards, so that inner drill bits 2-20 are flushed into a weak stratum, and a core is obtained in an inner pipe assembly; after the coring operation is finished, the piston assembly is limited through the matching of the anti-retreat keys 2-10 and the clamping grooves at the connecting parts of the upper mandrel 2-4 and the lower mandrel 2-5.
Referring to fig. 6, the press-in type rope coring drill tool of the present invention has the stopper rings 2 to 8 designed outside the shear pin sleeves 2 to 7, which can prevent the pin shaft iii from accidentally jumping out or falling off to cause a jamming accident in the process of lowering or lifting the drill tool; according to the press-in type rope coring drilling tool, the semi-slip rings 2-11 are designed into two semi-circular ring structures clamped on the shear pin sleeves 2-11, and a 5mm fit clearance is reserved between the semi-slip rings 2-11 and the shear pin sleeves 2-11 along the axial direction, so that when the pin shaft III is installed again, the shear pin sleeves can be aligned with the pin shaft holes in the connecting shaft.
Referring to fig. 10, the press-in type wire line core drilling method of the present invention, which adopts the press-in type wire line core drilling tool to realize the drilling core operation of the weak stratum, comprises the following operation steps:
a. after the last core-taking operation is finished, hole sweeping is carried out, the drilling tool is lifted to a certain distance away from the bottom of the hole, the drilling rod column is fixed on a drilling platform surface 7 through a hole opening clamper, and the top drive 5 is matched with a fisher to lift the assembled inner assembly 2 and place the inner assembly into the drilling rod from the hole opening;
b. lowering the inner assembly 2 into the outer assembly 1 by using a rope coring winch 10, pressing a suspension ring 2-2 of the inner assembly 2 on a seat ring 1-1 of the outer assembly 1, and slightly releasing a steel wire rope 6 of the rope coring winch 10 to prevent the rope coring winch from being in a tight state;
c. closing a center hole rubber plug of a top drive water faucet 4, enabling the rubber plug to extrude a steel wire rope 6, opening a lifting compensation system of the top drive 5, putting down a drilling tool by the top drive 5 under the coordination of a rope core winch 10, putting down the drilling tool until an outer drill bit 1-4 of an outer assembly 1 contacts with the bottom of a hole 9 of a drill hole, continuing putting down the ocean fluctuation height, then operating a seabed base disc, and clamping and fixing a drill string by a seabed base disc clamp 8;
d. the pump is started to supply water, the flange piston 2-13 in the inner assembly 2 generates downward thrust under the action of slurry pressure, the pin shaft III is cut off through the shearing pin sleeve 2-7, the inner pipe 2-18 is driven to be punched downwards, the inner drill bit 2-20 enters a weak stratum to start coring, seawater entering between the mandrel and the inner pipe is discharged through the large pressure relief hole 2-17-1 of the pressure relief joint 2-17, when the piston type operation part II moves to the end of the stroke under the pushing of the slurry, the liner pipe piston 2-6 covers the large pressure relief hole 2-17-1, at the moment, the large pressure relief hole 2-17-1 fails, the small pressure relief hole 2-16 on the quick-release outer sleeve 2-16 is continuously supplied with water to relieve the pressure so as to control the pressure difference between the upper part and the lower part of the flange piston 2-13, the collision between the liner pipe piston 2-6 and the inner sleeve 2-15 caused by the over-high speed, when the flange piston 2-13 moves to the position of the pressure relief groove 1-3 of the sealed outer pipe 1-2, the pressure of the slurry is reduced, and the repeated coring process is finished;
e. opening a seabed base disc clamp holder 8, lifting a top drive 5 and a drilling tool, driving an inner pipe 2-18 which is flushed into the stratum to leave the bottom of a hole under the drive of a seat ring 1-1 in an outer assembly 1, opening a center hole rubber plug of a water tap 4, and lifting the inner assembly 2 through a rope coring winch 10;
f. the orifice gripper fixes a drill string on a drilling platform surface 7, unloads the connection between the top drive 5 and the drill string, places an inner assembly 2 lifted to an orifice on a backing plate of the orifice, then divides the inner assembly into an upper part and a lower part through a quick inner assembly disassembly mechanism, respectively takes out the upper part and the lower part by using a fisher, and then extracts a transparent PC liner tube 2-19 in an inner tube to finish one-time coring operation;
g. and (3) reassembling the inner assembly 2 for standby, connecting the top drive 5 with the drill string to perform hole sweeping, sweeping the part of the drilled hole 9 from which the core is obtained, and repeating the steps to enter the next working cycle.
Claims (10)
1. A press-in type rope coring drilling tool comprises an outer assembly (1) and an inner assembly (2), wherein during coring operation, the inner assembly (2) is arranged in the outer assembly (1), and an annular structure (3) is formed between the inner assembly (2) and the outer assembly (1); the device is characterized in that a seat ring (1-1) and a sealing outer pipe (1-2) are arranged in the outer assembly (1), and a pressure relief groove (1-3) is arranged at the lower part of the sealing outer pipe (1-2); the inner assembly is provided with a fixed part (I) and a piston type moving part (II) sleeved outside the fixed part (I), the fixed part (I) comprises a fishing spearhead component (2-1), a suspension ring (2-2), a connecting shaft (2-3) and a mandrel, the fishing spearhead component (2-1) is connected with the mandrel through the connecting shaft (2-3), the suspension ring (2-2) is sleeved on the connecting shaft (2-3), the inner assembly (2) is carried on a seat ring (1-1) of the outer assembly (1) through the suspension ring (2-2), the piston type moving part (II) is fixed on the connecting shaft (2-3) through a pin shaft (III) before coring operation, a flange piston (2-13) tightly attached to a sealed outer pipe (1-2) in the outer assembly (1) is arranged in the piston type moving part (II), an inner drill bit (2-20) is arranged at the lower end of the piston type moving component (II), during coring operation, high-pressure slurry is injected into an annular structure (3) formed between the inner assembly (2) and the outer assembly (1) through a water pump arranged on a drilling platform surface (7), the piston type moving component (II) is pushed by slurry pressure to shear a pin shaft (III) and then move downwards, and the inner drill bit (2-20) is enabled to be flushed into a weak stratum and a rock core is obtained in an inner pipe assembly.
2. A press-in wireline core drill according to claim 1, characterized in that the piston-like moving part (ii) comprises a piston assembly, an inner tube assembly and an inner drill bit (2-20); the piston component comprises a flange piston (2-13), a piston seat (2-14), a sliding ring sleeve (2-12), a semi-sliding ring (2-11) and a shear pin sleeve (2-7), the shear pin sleeve (2-7), the semi-slip ring (2-11), the slip ring sleeve (2-12) and the piston seat (2-14) are sequentially connected from top to bottom, sealing elements (2-21) are arranged on the inner walls of the sliding ring sleeves (2-12) and the piston seats (2-14), a pin shaft hole (2-7-1) is arranged on the shear pin sleeve (2-7), the pin shaft (III) is arranged in the pin shaft hole (2-7-1) and penetrates through the connecting shaft (2-3), the flange piston (2-13) is embedded between the piston seat (2-14) and the sliding ring sleeve (2-12); an inner tube assembly and an inner drill bit (2-20) are mounted below the piston assembly.
3. A press-in wireline coring tool according to claim 2, wherein the mandrel comprises two parts, an upper mandrel (2-4) and a lower mandrel (2-5), wherein a clamping groove is provided at the connection part of the upper mandrel (2-4) and the lower mandrel (2-5), and a liner piston (2-6) is provided at the lower end of the lower mandrel (2-5).
4. The press-in type wire line core drill according to claim 3, wherein the piston assembly is further provided with an anti-back mechanism, the anti-back mechanism comprises anti-back keys (2-10) and torsion springs (2-9), the anti-back keys (2-10) are symmetrically arranged in two groups in the left and right direction and are assembled with the shear pin sleeves (2-7) in a hinged mode, the torsion springs (2-9) are installed between the shear pin sleeves (2-7) and the hinged shafts of the anti-back keys (2-10), and after the core drilling operation is completed, the piston assembly is limited through the matching of the anti-back keys (2-10), the upper core shaft (2-4) and the clamping grooves of the connecting parts of the lower core shaft (2-5).
5. The press-in type wire line core drill according to claim 4, characterized in that the piston type moving part (II) is further provided with a quick-release mechanism, the quick-release mechanism comprises a quick-release inner sleeve (2-15) and a quick-release outer sleeve (2-16) which are matched with each other, wherein the upper end of the quick-release inner sleeve (2-15) is assembled with a piston seat (2-14) of the piston assembly, and the lower end of the quick-release outer sleeve (2-16) is assembled with the inner pipe assembly.
6. The press-in wireline core drill tool of claim 5, wherein the inner tube assembly comprises a pressure relief fitting (2-17), an inner tube (2-18) and a transparent PC liner (2-19); the upper end of the inner pipe (2-18) is connected with the quick-release outer sleeve (2-16) through a pressure relief connector (2-17), the lower end of the inner pipe is connected with the inner drill bit (2-20), and the transparent PC bushing (2-19) is embedded in the inner cavities of the inner pipe (2-18) and the inner drill bit (2-20).
7. The press-in type rope coring drill tool as set forth in claim 7, wherein a large pressure relief hole (2-17-1) is provided on the side wall of the pressure relief joint (2-17), a small pressure relief hole (2-16-1) is provided on the side wall of the quick release casing (2-16), and the control of the movement speed of the piston type moving part (II) near the end point is realized by the cooperation of the large pressure relief hole (2-17-1) and the small pressure relief hole (2-16-1) with a liner piston (2-6) installed at the lower end of the lower mandrel (2-5).
8. A press-in type rope coring process method is characterized in that the press-in type rope coring drilling tool is adopted to realize drilling coring operation of a weak stratum, and the operation steps are as follows:
a. after the last core-taking operation is finished, hole sweeping is carried out, a drilling tool is lifted to a certain distance away from the bottom of a hole, a drilling rod column is fixed on a drilling platform surface (7) through a hole opening clamping device, and a top driver (5) is matched with a fisher to lift the assembled inner assembly (2) and place the inner assembly into the drilling rod from the hole opening;
b. the inner assembly (2) is placed into the outer assembly (1) by a rope coring winch (10), a suspension ring (2-2) of the inner assembly (2) is pressed on a seat ring (1-1) of the outer assembly (1), and a steel wire rope (6) of the rope coring winch (10) is slightly released and is not in a tight state;
c. closing a center hole rubber plug of a top drive water faucet (4), extruding a steel wire rope (6) with the rubber plug, opening a lifting compensation system of the top drive (5), putting down a drilling tool by the top drive (5) under the cooperation of a rope coring winch (10), and clamping and fixing a drill column by a seabed base plate clamp holder (8);
d. the pump is started to supply water, the flange pistons (2-13) in the inner assembly (2) generate downward thrust under the action of slurry pressure, the pin shaft (III) is cut off through the shearing pin sleeves (2-7), the inner pipes (2-18) are driven to be punched downwards, the inner drill bits (2-20) enter soft strata to obtain a core sample, when the flange pistons (2-13) move to the positions of pressure relief grooves (1-3) of the sealed outer pipes (1-2), the slurry pressure is reduced, and the repeated coring process is finished;
e. opening a seabed base disc clamp holder (8), lifting a top drive (5) and a drilling tool, driving an inner pipe (2-18) which is flushed into the stratum to leave the bottom of a hole under the drive of a seat ring (1-1) in an outer assembly (1), opening a center hole rubber plug of a water tap (4), and lifting the inner assembly (2) through a rope coring winch (10);
f. the orifice gripper fixes a drill string on a drilling platform surface (7), unloads a top drive (5) from being connected with the drill string, places an inner assembly (2) lifted to an orifice on a backing plate of the orifice, then divides the inner assembly into an upper part and a lower part through a quick inner assembly disassembly mechanism, takes out the upper part and the lower part respectively by using a fisher, and then extracts a transparent PC liner tube (2-19) in an inner tube to finish one-time coring operation;
g. and (3) reassembling the inner assembly (2) for standby, connecting the top drive (5) with the drill string to perform hole sweeping, sweeping the part of the drilled hole (9) where the core is obtained, and repeating the steps to enter the next working cycle.
9. A process of press-in wireline coring as claimed in claim 8 wherein in step c the drilling tool is lowered until the outer drill bit (1-4) of the outer assembly (1) contacts the bottom of the borehole (9), the lowering of the marine heave is continued and the subsea template is operated to clamp the drill string in position by the subsea template holder (8).
10. The process of press-in rope coring as set forth in claim 8, wherein in step d, when the inner pipe assembly starts coring, seawater entering between the mandrel and the inner pipe is discharged through a large pressure relief hole (2-17-1) of the pressure relief joint (2-17), when the piston type operation part (II) moves to the end of the stroke under the push of mud, the liner tube piston (2-6) covers the large pressure relief hole (2-17-1), at the moment, the large pressure relief hole (2-17-1) fails, the small pressure relief hole (2-16) on the quick release outer sleeve (2-16) continues to be filled with water for pressure relief, the pressure difference between the upper part and the lower part of the flange piston (2-13) is controlled, and the impact between the liner tube piston (2-6) and the quick-release inner sleeve (2-15) caused by the over-high speed of the piston type running part (II) is avoided.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309479A (en) * | 2021-07-12 | 2021-08-27 | 中国地质科学院勘探技术研究所 | Efficient coring drilling device and method for shallow sea reef limestone |
| CN115341867A (en) * | 2022-07-25 | 2022-11-15 | 广州海洋地质调查局 | Marine sediment injection rope coring device of shipborne drilling machine |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB534891A (en) * | 1939-06-17 | 1941-03-21 | Anglo Iranian Oil Co Ltd | Improvements relating to core boring apparatus |
| CN101864916A (en) * | 2010-05-27 | 2010-10-20 | 吉林大学 | Hole bottom freezing cord coring drill and coring method thereof |
| CN201723190U (en) * | 2010-06-10 | 2011-01-26 | 大庆油田有限责任公司 | Unconsolidated deposit hydraulic pressure type sealed coring tool |
| CN102296950A (en) * | 2011-05-16 | 2011-12-28 | 中海油田服务股份有限公司 | Hydraulic shearing type sampling drilling tool |
| CN103352671A (en) * | 2013-07-24 | 2013-10-16 | 李国民 | Rope core taking drill |
| US20140353044A1 (en) * | 2012-01-27 | 2014-12-04 | Atlas Copco Canada Inc | Core barrel head assembly |
| CN105525885A (en) * | 2014-09-28 | 2016-04-27 | 中国石油化工集团公司 | Rotating inserting type coring tool for extremely-loose stratum |
| CN106194087A (en) * | 2016-07-21 | 2016-12-07 | 中国地质科学院勘探技术研究所 | A kind of heavy caliber jumping chisel journey core drill and core-drilling method |
| CN107165597A (en) * | 2017-07-10 | 2017-09-15 | 西南石油大学 | A kind of wire line coring instrument and method |
| CN109025876A (en) * | 2018-08-13 | 2018-12-18 | 中国地质科学院勘探技术研究所 | A kind of rope salvaging type fluid power pressure core drill |
| CN208934628U (en) * | 2018-08-13 | 2019-06-04 | 中国地质科学院勘探技术研究所 | A kind of rope salvaging type pitching, which builds the pressure, forces core drill |
| CN110219612A (en) * | 2019-07-18 | 2019-09-10 | 长沙矿山研究院有限责任公司 | The drilling tool inner tube and operational method of seabed coring drilling with keep up pressure |
| CN110678620A (en) * | 2017-06-02 | 2020-01-10 | 山特维克知识产权股份有限公司 | Down-the-hole drill and method for rock drilling |
| CN210105798U (en) * | 2019-06-21 | 2020-02-21 | 四川康克石油科技有限公司 | Closed coring tool beneficial to coring |
| CN111058842A (en) * | 2020-01-07 | 2020-04-24 | 中国地质科学院勘探技术研究所 | Ocean self-feeding type sampling drilling tool and sampling method |
| CN111577181A (en) * | 2020-04-30 | 2020-08-25 | 北京探矿工程研究所 | Hydraulic propelling rotary type rope coring drilling system and coring method thereof |
| CN111577182A (en) * | 2020-04-30 | 2020-08-25 | 北京探矿工程研究所 | Deep sea hard rock efficient rope coring system and coring drilling method thereof |
| CN214787274U (en) * | 2020-09-08 | 2021-11-19 | 中国地质科学院勘探技术研究所 | Press-in type rope coring drilling tool |
-
2020
- 2020-09-08 CN CN202010936162.1A patent/CN112112588B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB534891A (en) * | 1939-06-17 | 1941-03-21 | Anglo Iranian Oil Co Ltd | Improvements relating to core boring apparatus |
| CN101864916A (en) * | 2010-05-27 | 2010-10-20 | 吉林大学 | Hole bottom freezing cord coring drill and coring method thereof |
| CN201723190U (en) * | 2010-06-10 | 2011-01-26 | 大庆油田有限责任公司 | Unconsolidated deposit hydraulic pressure type sealed coring tool |
| CN102296950A (en) * | 2011-05-16 | 2011-12-28 | 中海油田服务股份有限公司 | Hydraulic shearing type sampling drilling tool |
| US20140353044A1 (en) * | 2012-01-27 | 2014-12-04 | Atlas Copco Canada Inc | Core barrel head assembly |
| CN103352671A (en) * | 2013-07-24 | 2013-10-16 | 李国民 | Rope core taking drill |
| CN105525885A (en) * | 2014-09-28 | 2016-04-27 | 中国石油化工集团公司 | Rotating inserting type coring tool for extremely-loose stratum |
| CN106194087A (en) * | 2016-07-21 | 2016-12-07 | 中国地质科学院勘探技术研究所 | A kind of heavy caliber jumping chisel journey core drill and core-drilling method |
| CN110678620A (en) * | 2017-06-02 | 2020-01-10 | 山特维克知识产权股份有限公司 | Down-the-hole drill and method for rock drilling |
| CN107165597A (en) * | 2017-07-10 | 2017-09-15 | 西南石油大学 | A kind of wire line coring instrument and method |
| CN109025876A (en) * | 2018-08-13 | 2018-12-18 | 中国地质科学院勘探技术研究所 | A kind of rope salvaging type fluid power pressure core drill |
| CN208934628U (en) * | 2018-08-13 | 2019-06-04 | 中国地质科学院勘探技术研究所 | A kind of rope salvaging type pitching, which builds the pressure, forces core drill |
| CN210105798U (en) * | 2019-06-21 | 2020-02-21 | 四川康克石油科技有限公司 | Closed coring tool beneficial to coring |
| CN110219612A (en) * | 2019-07-18 | 2019-09-10 | 长沙矿山研究院有限责任公司 | The drilling tool inner tube and operational method of seabed coring drilling with keep up pressure |
| CN111058842A (en) * | 2020-01-07 | 2020-04-24 | 中国地质科学院勘探技术研究所 | Ocean self-feeding type sampling drilling tool and sampling method |
| CN111577181A (en) * | 2020-04-30 | 2020-08-25 | 北京探矿工程研究所 | Hydraulic propelling rotary type rope coring drilling system and coring method thereof |
| CN111577182A (en) * | 2020-04-30 | 2020-08-25 | 北京探矿工程研究所 | Deep sea hard rock efficient rope coring system and coring drilling method thereof |
| CN214787274U (en) * | 2020-09-08 | 2021-11-19 | 中国地质科学院勘探技术研究所 | Press-in type rope coring drilling tool |
Non-Patent Citations (2)
| Title |
|---|
| 包贵全;: "绳索取心工具与工艺技术研究", 地质装备, no. 01, pages 20 - 27 * |
| 王年友;谢文卫;冯起赠;苏长寿;宋志彬;: "绳索取心钻探技术的新发展――三合一组合钻具", 探矿工程(岩土钻掘工程), no. 09, pages 70 - 74 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309479A (en) * | 2021-07-12 | 2021-08-27 | 中国地质科学院勘探技术研究所 | Efficient coring drilling device and method for shallow sea reef limestone |
| CN115341867A (en) * | 2022-07-25 | 2022-11-15 | 广州海洋地质调查局 | Marine sediment injection rope coring device of shipborne drilling machine |
| CN115341867B (en) * | 2022-07-25 | 2024-03-19 | 广州海洋地质调查局 | Marine sediment penetrating rope coring device of shipborne drilling machine |
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