CN111577182B - Deep sea hard rock efficient rope coring system and coring drilling method thereof - Google Patents

Deep sea hard rock efficient rope coring system and coring drilling method thereof Download PDF

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Publication number
CN111577182B
CN111577182B CN202010367597.9A CN202010367597A CN111577182B CN 111577182 B CN111577182 B CN 111577182B CN 202010367597 A CN202010367597 A CN 202010367597A CN 111577182 B CN111577182 B CN 111577182B
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pipe
coring
assembly
tube
rope
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CN111577182A (en
Inventor
蔡家品
陈云龙
阮海龙
赵义
邓都都
贾美玲
刘协鲁
李春
梁涛
刘海龙
沈立娜
吴海霞
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Beijing Institute of Exploration Engineering
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Beijing Institute of Exploration Engineering
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B25/00Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
    • E21B25/02Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B25/00Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
    • E21B25/18Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being specially adapted for operation under water

Abstract

The invention discloses a deep sea hard rock high-efficiency rope coring system and a coring drilling method thereof, wherein the deep sea hard rock high-efficiency rope coring system comprises a coring outer pipe assembly and a coring inner pipe assembly; the inner pipe assembly comprises a rope fishing mechanism, a suspension mechanism, a shearing sliding mechanism, a sealing assembly mechanism and a high-speed rotary pipe; the core extractor mechanism and the hole expanding drilling tool mechanism are detachably connected with the high-speed rotary pipe in a replaceable way; when the coring outer pipe assembly is independently connected with the drill rod, the coring outer pipe assembly is used for coring or sweeping other strata of the non-hard rock stratum below the seawater; when the inner pipe assembly adopts the coring mechanism and is matched with the coring outer pipe assembly, the high-speed rotary pipe is used for driving the coring mechanism to core the hard rock stratum; when the inner pipe assembly adopts the hole expanding drilling tool mechanism and is matched with the coring outer pipe assembly, the high-speed rotary pipe is used for driving the hole expanding drilling tool mechanism to expand the hole at the bottom of the coring section. According to the invention, the hard rock core drilling and core section reaming operation is completed by a hydraulic driving principle, and the problem of low core drilling efficiency of deep sea hard rock stratum is solved.

Description

Deep sea hard rock efficient rope coring system and coring drilling method thereof
Technical Field
The invention relates to the technical field of drilling, in particular to a deep sea hard rock efficient rope coring system and a coring drilling method thereof, which are suitable for drilling coring construction of lakes, rivers, oceans and the like.
Background
With the adoption of the method, deep sea geological survey is listed as a strategic and prospective major scientific problem by national scientific and technological innovation planning, in addition, the regiment morhol drilling plan and other multiple ocean drilling plans are restarted in the next few years by the International Ocean Discovery Plan (IODP), and the deep sea hard rock drilling coring technology is the core, so that the method has very important significance on the whole-process, efficient and continuous acquisition of deep sea hard rocks in China and the deep sea scientific research, the morhol surface and the ocean drilling.
For deep sea drilling, when the drilling process is adjusted, the drill bit is replaced and the like, the drill string is required to return to the hole site again after the drill is lifted, the operation environment, conditions and operation flow are more complicated than those of the drill string on land, and the coring operation efficiency is greatly reduced. At present, the engineering implementation in the aspect of deep sea hard rock coring in China is still blank, and the research on deep sea and ocean scientific drilling is severely restricted.
Therefore, how to provide an efficient deep sea hard rock rope coring system and a coring drilling method thereof under a riser-free working condition is a problem to be solved by the technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides a deep-sea hard rock high-efficiency rope coring system, which aims to solve the above technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a deep sea hard rock high-efficiency rope coring system is connected with a drill rod; the method comprises the following steps: the core-pulling device comprises a coring outer pipe assembly and an inner pipe assembly which is put into or put out of the coring outer pipe assembly through a rope fisher with a steel wire rope;
the top of the coring outer tube assembly is communicated with the drill rod;
the inner pipe assembly comprises a rope fishing mechanism, a hanging mechanism, a shearing sliding mechanism, a sealing assembly mechanism and a high-speed rotary pipe which are sequentially connected from top to bottom; the core extractor mechanism and the hole expanding drilling tool mechanism are detachably connected with the high-speed rotary pipe in a replaceable way; the rope fishing mechanism is used for being connected with the rope fisher; the hanging mechanism is used for connecting the rope fishing mechanism and the shearing sliding mechanism; the sealing assembly mechanism is used for connecting the shearing sliding mechanism and the high-speed rotary pipe and forming a sealing space to obtain mud pressure; the high-speed rotary pipe is driven by high-pressure slurry in the drill rod to rotate and unlock the shearing sliding mechanism, so that the high-speed rotary pipe can simultaneously slide up and down;
when the coring outer pipe assembly is separately connected with the drill rod, the coring outer pipe assembly is used for coring or sweeping other strata of a non-hard rock stratum below seawater;
when the inner pipe assembly adopts the coring mechanism and is matched with the coring outer pipe assembly, the high-speed rotary pipe is used for driving the coring mechanism to core the hard rock formation;
when the inner tube assembly adopts the reaming drilling tool mechanism and is matched with the coring outer tube assembly, the high-speed rotary tube is used for driving the reaming drilling tool mechanism to ream the bottom of the coring section.
Through the technical scheme, the hard rock coring drilling and core section reaming operation is completed through a stable and reliable hydraulic driving principle, the loss of a core outer pipe assembly drill bit is avoided, the core drill bit and the reaming drill bit of an inner pipe assembly only need to be replaced on a deck, the long-time continuous coring without lifting the drill under the working condition of deep sea hard rock without a water-resisting pipe is realized, and the problem of low core-taking efficiency in deep sea hard rock stratum drilling is solved.
Preferably, in the deep sea hard rock high-efficiency rope coring system, the rope fishing mechanism comprises a rope fishing spearhead, a sliding pipe, a first spring, an elastic clip and an elastic clip seat; the rope fishing spearhead is connected to the sliding pipe through an open elastic pin; the first spring and the elastic clamp are arranged in the elastic clamp seat, the elastic clamp and the elastic clamp seat are connected through a split elastic pin, and the first spring is in a tensioned state to expand the elastic clamp and is clamped and positioned with the inner wall of the coring outer tube assembly; the elastic clamping seat is connected with the suspension mechanism through threads. The anti-twisting function of the high-speed rotary pipe can be realized through the arrangement of the elastic clamp.
Preferably, in the deep sea hard rock high efficiency rope core system, the suspension mechanism comprises a suspension ring and a connecting seat; the suspension ring is sleeved on the elastic clamping seat, and the connecting seat and the elastic clamping seat are connected through threads and clamp and fix the suspension ring. The connecting structure is stable and reliable.
Preferably, in the deep sea hard rock high-efficiency rope core-pulling system, the shearing sliding mechanism comprises a guide pipe outer sleeve, a limiting joint, a guide pipe and a shearing pin; one end of the guide pipe outer sleeve is connected with the connecting seat through threads; the limiting joint is connected with the other end of the guide pipe outer sleeve through threads; the guide pipe is coaxially sleeved inside the guide pipe outer sleeve and is in sliding connection with the limiting joint, so that the guide pipe and the guide pipe outer sleeve can axially slide; the shearing pin is installed on the shearing hole of the guide pipe outer sleeve through threads and is inserted into the end side wall of the guide pipe. The guide pipe and the guide pipe are sleeved in a relative static state before core drilling, a shearing pin is cut off during core drilling, the guide pipe cannot rotate relative to the guide pipe outer sleeve but can freely slide up and down, when the high-speed rotating pipe drives the coring mechanism to enter stratum core drilling, the guide pipe is driven to slide downwards, when the high-speed rotating pipe drives the coring mechanism to enter a limiting joint, one-time core drilling is completed, and the limiting joint has a locking function on the coring inner pipe assembly and plays a limiting role.
Preferably, in the deep sea hard rock high efficiency wireline coring system, the sealing assembly mechanism comprises a sealing upper seat, a sealing group and a sealing lower seat; the sealing upper seat is connected with the guide pipe through threads; the sealing group is sleeved on the sealing upper seat; the lower sealing seat is connected with the upper sealing seat through threads and clamps and fixes the sealing group, and the lower sealing seat is connected with the high-speed rotary pipe through threads. The sealing assembly mechanism can freely slide up and down in the sealing outer pipe to form a sealing space, and thus, the mud pressure is obtained, the high-speed rotary pipe is driven, and the core taking mechanism is pushed to rotate to core taking and drilling or reaming.
Preferably, in the deep sea hard rock high-efficiency rope coring system, the coring mechanism comprises an outer pipe joint, a single-action assembly, an outer pipe, a core clamping assembly, a drill bit, an inner pipe and a reamer; the outer pipe joint is connected with the high-speed rotary pipe through threads; one end of the single-acting assembly is connected with the outer pipe joint through threads; one end of the outer pipe is connected with the single-action assembly; one end of the core clamping assembly is connected with the other end of the outer pipe through threads; the drill bit is connected with the other end of the rock core clamping assembly through threads; the inner pipe is coaxially sleeved inside the outer pipe, and one end of the inner pipe is fixedly connected with the single-action assembly; the reamer is fixedly connected with the other end of the inner pipe. The core drilling sampling can be effectively realized.
Preferably, in the deep sea hard rock high efficiency wireline coring system, the reamer tool mechanism comprises an upper joint in threaded connection with the high speed rotary pipe; the upper joint is connected with an upper piston through downward threads; the outer wall of the upper piston is slidably sleeved with a limiting outer tube; the limiting outer pipe is downwards and sequentially in threaded connection with a piston outer pipe, a reaming bit outer pipe and a limiting outer pipe joint; the lower part of the upper piston is sleeved with a second spring and is supported and fixed through a spring backing ring; the bottom end of the upper piston is in threaded connection with a supporting leg inner tube with a through axis, and a plurality of nozzles are uniformly arranged on the supporting leg inner tube; the outer wall of the outer tube of the reaming bit is hinged with a plurality of reaming bits; a support connecting rod is hinged between the inner side wall of the reaming bit and the inner tube of the support leg; the inner supporting leg limit is fixedly sleeved on the inner supporting leg pipe, and the outer supporting leg limit is fixedly sleeved on the outer wall of the reamer bit outer pipe.
When the hole expanding drilling tool mechanism works, under the action of high-pressure slurry, the upper piston is pushed to move downwards to drive the inner tube of the supporting leg to move downwards, so that the supporting connecting rod is expanded outwards, the hole expanding drill bit is expanded to perform hole expanding work, and the inner tube of the supporting leg is provided with a nozzle which can spray slurry with a certain flow rate and is used for cooling the hole expanding drill bit;
when the hole expanding drill mechanism is recovered, the mud pump is closed, the rope fisher is lowered, and the recovery of the hole expanding drill bit is completed by means of the tension of the spring and the lifting force of the rope fisher.
Preferably, in the deep sea hard rock high-efficiency rope core-pulling system, the joint of the limit outer tube and the piston outer tube, the contact part of the outer wall of the bottom end of the support leg inner tube and the inner wall of the reamer bit outer tube, and the joint of the upper piston and the support leg inner tube are all provided with an O-shaped seal. The sealing performance of the connecting piece can be effectively improved.
Preferably, in the deep sea hard rock high-efficiency rope coring system, the coring outer pipe assembly comprises a drill pipe joint, an elastic clamping chamber, a seat ring chamber, a sealing outer pipe, a centralizer and a coring bit which are sequentially connected through threads; the drill rod joint is connected with the drill rod through threads; a seat ring is sleeved in the seat ring chamber; the seat ring is close to the connecting end of the elastic clamping chamber and the seat ring chamber; the elastic clamp is arranged in the elastic clamp chamber, and the anti-twisting function of the high-speed rotary pipe can be realized. The coring outer tube assembly can be effectively connected with the inner tube assembly in a matching way.
The invention also provides a core drilling method of the deep sea hard rock efficient rope core drilling system, which comprises the following steps:
s1, assembling the coring outer tube assembly, connecting a drill rod to be lowered to the surface of the seabed, starting a slurry pump to core or sweep the hole to a hard rock stratum, and then closing the slurry pump;
s2, assembling the inner pipe assembly by using a coring device mechanism, putting the assembled inner pipe assembly into a drill rod by using a rope fisher with a steel wire rope, finally putting the inner pipe assembly into the coring outer pipe assembly, releasing the rope fisher by using a releasing device, lifting the fisher, and starting a mud pump circulating system;
s3, adjusting the discharge capacity of a slurry pump, driving a high-speed rotary pipe to shear a shear pin by means of slurry pressure, and pushing a coring mechanism to rotate for coring drilling;
s4, after the set coring stroke is finished, the pressure of the slurry pump suddenly drops in a short time through the pressure relief hole, which indicates that coring drilling is finished, the rope fisher is thrown into the drill rod, the inner pipe assembly is lifted from the ground layer through the rope fisher mechanism, and coring operation is finished;
s5, reassembling the inner pipe assembly by using the hole expanding drilling tool mechanism, putting the assembled hole expanding drilling tool mechanism into a drill rod by using a rope fisher with a steel wire rope, finally entering the coring outer pipe assembly, unfreezing the rope fisher by using an unfreezing device, lifting the fisher out, lifting the outer pipe assembly for a certain stroke, and starting a mud pump circulating system;
s6, adjusting the discharge capacity of a mud pump, shearing a shearing pin by means of mud pressure, driving a hole expanding drill bit at the bottom of the hole expanding drill mechanism to open, driving a high-speed rotary pipe to drive the hole expanding drill bit to rotate by means of high-pressure mud, and pushing the hole expanding drill mechanism to advance by means of the coring outer pipe assembly;
s7, after the reaming stroke is set, the mud pump is closed, the rope fisher is lowered, and the reaming bit is recovered by means of the tension of the second spring in the reaming drilling tool mechanism and the lifting force of the rope fisher, so that the reaming operation is completed;
and S8, starting a slurry pump, and lowering the coring outer pipe assembly to the bottom of the hole section which is subjected to the hole expanding operation to prepare for the next coring operation.
Through the technical scheme, the cyclic coring and reaming processes are adopted, the coring section is reamed without depending on the drill bit of the outer pipe assembly, the inner pipe drill bit and the reaming drill bit are only required to be replaced on the deck by combining the rope coring process, the long-time continuous coring without the lifting of the drill bit of the deep sea hard rock is realized, and the problem of low coring efficiency in the drilling of the deep sea hard rock stratum is solved.
According to the technical scheme, compared with the prior art, the invention discloses and provides the deep sea hard rock high-efficiency rope core-drilling system and the core-drilling method thereof, and the deep sea hard rock high-efficiency rope core-drilling system has the following beneficial effects:
1. the invention completes hard rock coring drilling and core section reaming operation by a stable and reliable hydraulic driving principle, avoids the loss of a coring outer pipe assembly drill bit, only needs to replace a coring drill bit and a reaming drill bit of an inner pipe assembly on a deck, realizes the long-time continuous coring without lifting the drill under the working condition of deep sea hard rock without a water-proof pipe, solves the problem of low deep sea hard rock stratum drilling coring efficiency, and has positive promoting effect on deep sea scientific research, "Mohuo surface" and oceanic water-proof pipe-free drilling.
2. The cyclic coring and reaming processes adopted by the invention do not depend on the outer pipe assembly drill bit to perform coring section reaming, and only the inner pipe drill bit and the reaming drill bit need to be replaced on the deck by combining the rope coring process, so that the long-time continuous coring without drilling of deep sea hard rock is realized, and the problem of low coring efficiency in drilling of deep sea hard rock strata is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of deep sea hard rock high-efficiency wireline core drilling for coring or hole sweeping of other strata according to the invention;
FIG. 2 is a schematic diagram of deep sea hard rock high-efficiency wireline core drilling into a hard rock formation for core drilling;
FIG. 3 is a schematic diagram of bottom reaming of a deep sea hard rock efficient rope core drilling core section provided by the invention;
FIG. 4 is a schematic view of the outer core tube assembly according to the present invention;
FIG. 5 is a schematic view of an inner tube assembly according to the present invention;
FIG. 6 is an enlarged view, partially in section, of the connection of the cable fishing mechanism and the hitch provided by the present invention;
FIG. 7 is an enlarged view, partially in section, of the suspension mechanism, shear slide mechanism, seal assembly mechanism and high speed rotary pipe connection provided in accordance with the present invention;
FIG. 8 is an enlarged view, partially in section, of the high speed rotary tube and coring mechanism connection provided by the present invention;
FIG. 9 is a schematic structural diagram of the expanding and reaming of the deep sea hard rock efficient rope coring system reaming drilling mechanism provided by the invention;
FIG. 10 is a schematic diagram illustrating a retrieval of a reamer mechanism of a deep sea hard rock high efficiency wireline coring system according to the present invention;
FIG. 11 is a schematic view of the retrieval of the reamer mechanism of the present invention;
fig. 12 is a schematic diagram of the expanding and reaming structure of the expanding drill mechanism provided by the invention.
Wherein:
1-seawater; 2-other strata; 3-hard rock formation;
4-a drill pipe joint; 5-a cartridge chamber; 6-a seat ring;
7-a seat ring chamber; 8-sealing the outer tube; 9-a centralizer;
10-coring bit; 11-a rope fishing mechanism; 12-a suspension mechanism;
13-a shear slide mechanism; 14-a seal assembly mechanism; 15-high speed rotary pipe;
16-a corer mechanism; 17-cylindrical core sample; 18-a reamer tool mechanism;
19-fishing spearhead with rope; 20-a sliding tube; 21-a first spring;
22-a bullet card; 23-cartridge holder; 24-a suspension ring;
25-a connecting seat; 26-shear pins; 27-a guide tube;
28-guiding pipe outer sleeve; 29-a limit joint; 30-sealing the upper seat;
31-a sealing group; 32-sealing lower seat; 33-outer tube joint;
34-a single-action assembly; 35-an outer tube; 36-an inner tube;
37-a reamer; 38-core gripping assembly; 39-a drill bit;
40-upper joint; 41-upper piston; 42-a limiting outer tube;
a 43-O type seal; 44-piston outer tube; 45-a second spring;
46-a spring grommet; 47-limiting in the supporting leg; 48-a nozzle;
49-supporting leg external limit; 50-expanding a bit; 51-a support link;
52-support leg inner tube; 53-reaming the outer tube of the drill bit; 54-limiting the outer pipe joint.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached drawings 1 to 12, the embodiment of the invention discloses a deep sea hard rock high-efficiency rope core-taking system which is connected with a drill rod; the method comprises the following steps: the inner pipe assembly is placed in or lifted out of the coring outer pipe assembly through a rope fisher with a steel wire rope;
the top of the coring outer tube assembly is communicated with a drill rod;
the inner pipe assembly comprises a rope fishing mechanism 11, a hanging mechanism 12, a shearing sliding mechanism 13, a sealing assembly mechanism 14 and a high-speed rotary pipe 15 which are sequentially connected from top to bottom; the core extractor mechanism 16 and the hole expanding drilling tool mechanism 18 are detachably connected with the high-speed rotary pipe 15 in a replaceable way; the rope fishing mechanism 11 is used for connecting with a rope fishing device; the hanging mechanism 12 is used for connecting the rope fishing mechanism 11 and the shearing sliding mechanism 13; the sealing assembly mechanism 14 is used for connecting the shearing sliding mechanism 13 and the high-speed rotary pipe 15 and forming a sealing space to obtain mud pressure; the high-speed rotary pipe 15 is driven by high-pressure slurry in the drill rod to rotate, unlock and shear the sliding mechanism 13, so that the high-speed rotary pipe 15 can slide up and down simultaneously;
when the coring outer pipe assembly is independently connected with the drill rod, the coring outer pipe assembly is used for coring or sweeping holes in other strata 2 of the non-hard rock stratum below the seawater 1;
when the inner pipe assembly adopts the coring mechanism 16 and is matched with the coring outer pipe assembly, the high-speed rotary pipe 15 is used for driving the coring mechanism 16 to core the hard rock stratum 3;
when the inner pipe assembly adopts the hole expanding drilling tool mechanism 18 and is matched with the coring outer pipe assembly, the high-speed rotary pipe 15 is used for driving the hole expanding drilling tool mechanism 18 to expand the hole at the bottom of the coring section.
In order to further optimize the above technical solution, the rope fishing mechanism 11 includes a rope fishing spearhead 19, a sliding tube 20, a first spring 21, an elastic clip 22 and an elastic clip seat 23; the rope fishing spearhead 19 is connected to the sliding tube 20 through a split elastic pin; the first spring 21 and the elastic clamp 22 are arranged in the elastic clamp seat 23, the elastic clamp 22 and the elastic clamp seat 23 are connected through a split elastic pin, and the first spring 21 is in a tensioned state to prop the elastic clamp 22 open and is clamped and positioned with the inner wall of the coring outer tube assembly; the spring seat 23 is connected to the suspension mechanism 12 by a screw.
In order to further optimize the above technical solution, the suspension mechanism 12 comprises a suspension ring 24 and a connection seat 25; the suspension ring 24 is sleeved on the elastic clamping seat 23, and the connecting seat 25 is connected with the elastic clamping seat 23 through threads and clamps and fixes the suspension ring 24.
In order to further optimize the technical scheme, the shearing sliding mechanism 13 comprises a guide pipe outer sleeve 28, a limiting joint 29, a guide pipe 27 and a shearing pin 26; one end of the guide pipe outer sleeve 28 is connected with the connecting seat 25 through threads; the limit joint 29 is connected with the other end of the guide pipe outer sleeve 28 through threads; the guide tube 27 is coaxially sleeved inside the guide tube outer sleeve 28 and is in sliding connection with the limiting joint 29, so that the guide tube 27 and the outer sleeve of the guide tube can axially slide; shear pins 26 are threadedly mounted in shear holes in the guide tube housing 28 and are inserted into the end side walls of the guide tube 27.
In order to further optimize the above technical solution, the seal assembly mechanism 14 includes a seal upper seat 30, a seal group 31 and a seal lower seat 32; the upper sealing seat 30 is connected with the guide pipe 27 through threads; the sealing group 31 is sleeved on the sealing upper seat 30; the lower sealing seat 32 is connected with the upper sealing seat 30 through threads and clamps and fixes the sealing group 31, and the lower sealing seat 32 is connected with the high-speed rotary pipe 15 through threads.
To further optimize the above solution, the coring mechanism 16 comprises an outer tube joint 33, a single action assembly 34, an outer tube 35, a core gripping assembly 38, a drill bit 39, an inner tube 36, and a reamer 37; the outer pipe joint 33 is connected with the high-speed rotary pipe 15 through threads; one end of the single-acting component 34 is connected with the outer pipe joint 33 through threads; one end of the outer pipe 35 is connected with the single-action assembly 34; one end of the core clamping assembly 38 is connected with the other end of the outer tube 35 through threads; the drill bit 39 is connected with the other end of the core clamping assembly 38 through threads; the inner tube 36 is coaxially sleeved inside the outer tube 35, and one end of the inner tube is fixedly connected with the single-action component 34; the reamer 37 is fixedly connected to the other end of the inner tube 36.
In order to further optimize the above technical solution, the reamer tool mechanism 18 comprises an upper joint 40 in threaded connection with the high-speed rotary pipe 15; the upper joint 40 is connected with an upper piston 41 in a downward threaded manner; the outer wall of the upper piston 41 is slidably sleeved with a limiting outer tube 42; the limiting outer tube 42 is downwards in threaded connection with a piston outer tube 44, a reamer bit outer tube 53 and a limiting outer tube joint 54 in sequence; the lower part of the upper piston 41 is sleeved with a second spring 45 and is supported and fixed through a spring backing ring 46; the bottom end of the upper piston 41 is in threaded connection with a supporting leg inner tube 52 with a through axle center, and a plurality of nozzles 48 are uniformly arranged on the supporting leg inner tube 52; the outer wall of the reamer bit outer tube 53 is hinged with a plurality of reamer bits 50; a support connecting rod 51 is hinged between the inner side wall of the reamer bit 50 and the support leg inner tube 52; the inner supporting leg limit 47 is fixedly sleeved on the inner supporting leg pipe 52, and the outer supporting leg limit 49 is fixedly sleeved on the outer wall of the reamer bit outer pipe 53.
In order to further optimize the technical scheme, O-shaped seals 43 are arranged at the joints of the limiting outer tube 42 and the piston outer tube 44, the contact part of the outer wall of the bottom end of the supporting leg inner tube 52 and the inner wall of the reamer bit outer tube 53 and the joints of the upper piston 41 and the supporting leg inner tube 52.
In order to further optimize the technical scheme, the coring outer tube assembly comprises a drill rod joint 4, an elastic clamping chamber 5, a seat ring chamber 7, a sealing outer tube 8, a centralizer 9 and a coring bit 10 which are sequentially connected through threads; the drill rod joint 4 is connected with a drill rod through threads; a seat ring 6 is sleeved in the seat ring chamber 7; the seat ring 6 is close to the connecting end of the elastic clamping chamber 5 and the seat ring chamber 7; the elastic clamp 22 is clamped in the elastic clamp chamber 5, and can realize the anti-twisting function of the high-speed rotary pipe 15.
The invention provides a core drilling method of a deep sea hard rock high-efficiency rope core drilling system, which comprises the following steps:
s1, assembling the coring outer tube assembly, connecting a drill rod to be lowered to the surface of the seabed, starting a slurry pump to core or sweep the hole to a hard rock stratum, and then closing the slurry pump;
s2, assembling the inner pipe assembly by using a coring device mechanism, putting the assembled inner pipe assembly into a drill rod by using a rope fisher with a steel wire rope, finally putting the inner pipe assembly into the coring outer pipe assembly, releasing the rope fisher by using a releasing device, lifting the fisher, and starting a mud pump circulating system;
s3, adjusting the discharge capacity of a slurry pump, driving the high-speed rotary pipe 15 to shear the shear pin 26 by means of slurry pressure, and pushing the coring mechanism 16 to rotate for coring and drilling;
s4, after the set coring stroke is finished, the pressure of the slurry pump suddenly drops in a short time through the pressure relief hole, which indicates that coring drilling is finished, the rope fisher is thrown into the drill rod, the inner pipe assembly is lifted from the ground layer through the rope fisher mechanism 11, and coring operation is finished;
s5, reassembling the inner pipe assembly by using the hole expanding drilling tool mechanism 18, putting the assembled hole expanding drilling tool mechanism 18 into a drill rod by using a rope fisher with a steel wire rope, finally enabling the drill rod to enter the coring outer pipe assembly, unfreezing the rope fisher by using an unfreezing device, lifting the fisher, lifting the outer pipe assembly for a certain stroke, and starting a mud pump circulating system;
s6, adjusting the discharge capacity of the slurry pump, shearing the shearing pin 26 by means of slurry pressure, driving the hole expanding drill bit 50 at the bottom of the hole expanding drill mechanism 18 to open, driving the high-speed rotary pipe 15 to drive the hole expanding drill bit 50 to rotate by means of high-pressure slurry, and pushing the hole expanding drill mechanism 18 to advance by means of the coring outer pipe assembly;
s7, after the reaming stroke is set, the mud pump is closed, the rope fisher is lowered, the reaming bit 50 is recovered by means of the tension of the second spring 45 in the reaming drilling tool mechanism 18 and the lifting force of the rope fisher, and the reaming operation is completed;
and S8, starting a slurry pump, and lowering the coring outer pipe assembly to the bottom of the hole section which is subjected to the hole expanding operation to prepare for the next coring operation.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (2)

1. A deep sea hard rock high-efficiency rope coring system is connected with a drill rod; it is characterized by comprising: the core-pulling device comprises a coring outer pipe assembly and an inner pipe assembly which is put into or put out of the coring outer pipe assembly through a rope fisher with a steel wire rope;
the top of the coring outer tube assembly is communicated with the drill rod;
the inner pipe assembly comprises a rope fishing mechanism (11), a hanging mechanism (12), a shearing sliding mechanism (13), a sealing assembly mechanism (14) and a rotary pipe (15) which are sequentially connected from top to bottom; the core extractor mechanism (16) and the hole expanding drill mechanism (18) are detachably connected with the rotary pipe (15) in a replaceable way; the rope fishing mechanism (11) is used for being connected with the rope fishing device; the suspension mechanism (12) is used for connecting the rope fishing mechanism (11) and the shearing sliding mechanism (13); the sealing assembly mechanism (14) is used for connecting the shearing sliding mechanism (13) and the rotary pipe (15) and forming a sealing space to obtain mud pressure; the rotary pipe (15) is driven by high-pressure mud in the drill rod to rotate and unlock the shearing sliding mechanism (13), so that the rotary pipe (15) can slide up and down simultaneously;
the rope fishing mechanism (11) comprises a rope fishing spearhead (19), a sliding pipe (20), a first spring (21), an elastic clip (22) and an elastic clip seat (23); the rope fishing spearhead (19) is connected to the sliding tube (20) through a split elastic pin; the first spring (21) and the elastic clamp (22) are arranged in the elastic clamp seat (23), the elastic clamp (22) and the elastic clamp seat (23) are connected through an open elastic pin, and the elastic clamp (22) is propped open by the first spring (21) in a tightened state and is clamped and positioned with the inner wall of the coring outer tube assembly; the spring clamping seat (23) is connected with the suspension mechanism (12) through threads;
the suspension mechanism (12) comprises a suspension ring (24) and a connecting seat (25); the suspension ring (24) is sleeved on the elastic clamping seat (23), and the connecting seat (25) is connected with the elastic clamping seat (23) through threads and clamps and fixes the suspension ring (24);
the shearing sliding mechanism (13) comprises a guide pipe outer sleeve (28), a limiting joint (29), a guide pipe (27) and a shearing pin (26); one end of the guide pipe outer sleeve (28) is connected with the connecting seat (25) through threads; the limiting joint (29) is connected with the other end of the guide pipe outer sleeve (28) through threads; the guide pipe (27) is coaxially sleeved inside the guide pipe outer sleeve (28) and is in sliding connection with the limiting joint (29), so that the guide pipe and the guide pipe (27) can axially slide; the shearing pin (26) is installed on the shearing hole of the guide pipe outer sleeve (28) through threads and is inserted into the end side wall of the guide pipe (27);
the sealing assembly mechanism (14) comprises a sealing upper seat (30), a sealing group (31) and a sealing lower seat (32); the sealing upper seat (30) is connected with the guide pipe (27) through threads; the sealing group (31) is sleeved on the sealing upper seat (30); the lower sealing seat (32) is connected with the upper sealing seat (30) through threads and clamps and fixes the sealing group (31), and the lower sealing seat (32) is connected with the rotary pipe (15) through threads;
the core extractor mechanism (16) comprises an outer pipe joint (33), a single-action assembly (34), an outer pipe (35), a core clamping assembly (38), a drill bit (39), an inner pipe (36) and an underreamer (37); the outer pipe joint (33) is connected with the rotary pipe (15) through threads; one end of the single-action component (34) is connected with the outer pipe joint (33) through threads; one end of the outer pipe (35) is connected with the single-action component (34); one end of the core clamping assembly (38) is connected with the other end of the outer pipe (35) through threads; the drill bit (39) is connected with the other end of the core clamping assembly (38) through threads; the inner pipe (36) is coaxially sleeved inside the outer pipe (35), and one end of the inner pipe is fixedly connected with the single-action component (34); the reamer (37) is fixedly connected with the other end of the inner pipe (36);
the reaming drilling tool mechanism (18) comprises an upper connector (40) which is in threaded connection with the rotary pipe (15); the upper joint (40) is connected with an upper piston (41) in a downward threaded manner; the outer wall of the upper piston (41) is sleeved with a limiting outer tube (42) in a sliding manner; the limiting outer tube (42) is downwards connected with a piston outer tube (44), a reamer bit outer tube (53) and a limiting outer tube joint (54) in sequence in a threaded mode; the lower part of the upper piston (41) is sleeved with a second spring (45) and is supported and fixed through a spring backing ring (46); the bottom end of the upper piston (41) is in threaded connection with a supporting leg inner tube (52) with a through shaft center, and a plurality of nozzles (48) are uniformly arranged on the supporting leg inner tube (52); the outer wall of the reamer bit outer pipe (53) is hinged with a plurality of reamer bits (50); a support connecting rod (51) is hinged between the inner side wall of the reaming bit (50) and the support leg inner pipe (52); the inner supporting leg limit (47) is fixedly sleeved on the inner supporting leg pipe (52), and the outer supporting leg limit (49) is fixedly sleeved on the outer wall of the reamer bit outer pipe (53);
o-shaped seals (43) are arranged at the connection part of the limiting outer tube (42) and the piston outer tube (44), the contact part of the outer wall of the bottom end of the support leg inner tube (52) and the inner wall of the reaming bit outer tube (53), and the connection part of the upper piston (41) and the support leg inner tube (52);
the coring outer pipe assembly comprises a drill rod joint (4), an elastic clamping chamber (5), a seat ring chamber (7), a sealing outer pipe (8), a centralizer (9) and a coring bit (10) which are sequentially connected through threads; the drill rod joint (4) is connected with the drill rod through threads; a seat ring (6) is sleeved in the seat ring chamber (7); the seat ring (6) is close to the connecting end of the elastic clamping chamber (5) and the seat ring chamber (7); the elastic clamp (22) is clamped in the elastic clamp chamber (5) and can realize the function of anti-twisting the rotary pipe (15);
when the coring outer pipe assembly is connected with the drill pipe independently, the coring outer pipe assembly is used for coring or sweeping holes in other strata (2) below the seawater (1) and in non-hard rock strata;
when the inner pipe assembly adopts the coring mechanism (16) and is matched with the coring outer pipe assembly, the rotary pipe (15) is used for driving the coring mechanism (16) to core the hard rock stratum (3);
when the inner tube assembly adopts the hole expanding drilling tool mechanism (18) and is matched with the coring outer tube assembly, the rotary tube (15) is used for driving the hole expanding drilling tool mechanism (18) to expand the hole at the bottom of the coring section.
2. A core drilling method of the deep sea hard rock high efficiency wireline core drilling system according to claim 1, comprising the steps of:
s1, assembling the coring outer tube assembly, connecting a drill rod to be lowered to the surface of the seabed, starting a slurry pump to core or sweep the hole to a hard rock stratum, and then closing the slurry pump;
s2, assembling the inner pipe assembly by using a coring device mechanism, putting the assembled inner pipe assembly into a drill rod by using a rope fisher with a steel wire rope, finally putting the inner pipe assembly into the coring outer pipe assembly, releasing the rope fisher by using a releasing device, lifting the fisher, and starting a mud pump circulating system;
s3, adjusting the discharge capacity of a slurry pump, driving a rotary pipe (15) to shear a shear pin (26) by means of slurry pressure, and pushing a coring mechanism (16) to rotate for coring and drilling;
s4, after the set coring stroke is finished, the pressure of the slurry pump suddenly drops in a short time through the pressure relief hole to indicate that coring drilling is finished, the rope fisher is thrown into the drill rod, the inner pipe assembly is lifted away from the stratum through the rope fisher mechanism (11), and coring operation is finished;
s5, reassembling the inner pipe assembly by using the hole expanding drilling tool mechanism (18), putting the assembled hole expanding drilling tool mechanism (18) into a drill rod by using a rope fisher with a steel wire rope, finally enabling the assembled hole expanding drilling tool mechanism to enter the coring outer pipe assembly, unfreezing the rope fisher by using an unfreezing device, lifting the fisher out, lifting the outer pipe assembly for a certain stroke, and starting a mud pump circulating system;
s6, adjusting the discharge capacity of a mud pump, shearing a shearing pin (26) by means of mud pressure, driving a hole expanding drill bit (50) at the bottom of a hole expanding drill mechanism (18) to open, driving a rotary pipe (15) to drive the hole expanding drill bit (50) to rotate by means of high-pressure mud, and pushing the hole expanding drill mechanism (18) to advance by means of a coring outer pipe assembly;
s7, after the reaming stroke is set, the mud pump is closed, the rope fisher is lowered, the reaming bit (50) is recovered by means of the tension of the second spring (45) in the reaming drilling tool mechanism (18) and the lifting force of the rope fisher, and reaming operation is completed;
and S8, starting a slurry pump, and lowering the coring outer pipe assembly to the bottom of the hole section which is subjected to the hole expanding operation to prepare for the next coring operation.
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