CN115538965A - Press-in type rope coring device - Google Patents
Press-in type rope coring device Download PDFInfo
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- CN115538965A CN115538965A CN202211211098.6A CN202211211098A CN115538965A CN 115538965 A CN115538965 A CN 115538965A CN 202211211098 A CN202211211098 A CN 202211211098A CN 115538965 A CN115538965 A CN 115538965A
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- assembly
- joint
- pull rod
- coring
- fixedly connected
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/02—Apparatus 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
Abstract
The invention relates to a press-in type rope coring device, comprising: a joint assembly sealingly abuttable to a seat ring of an external drilling assembly; drive assembly, inside is formed with the hydraulic pressure chamber that is linked together with liquid passage, and drive assembly includes outer assembly and interior assembly, and interior assembly includes: a connecting pull rod arranged along the axial direction; the piston type moving component is hermetically and slidably arranged between the connecting pull rod and the external assembly, the piston type moving component hermetically divides the hydraulic chamber into an upper chamber and a lower chamber, and one end of the connecting pull rod is fixed on the joint component; the connecting transition part is hermetically and slidably sleeved on the connecting pull rod and is fixedly connected with the piston type moving assembly in a sealing manner, the connecting transition part and the connecting pull rod extend to the outside of the external assembly in a sealing manner, and a medium channel communicated with the lower chamber is formed in the external assembly; and the coring assembly is fixedly connected with the connecting transition part. The invention can effectively improve the acquisition quality and the recovery ratio of the rock core.
Description
Technical Field
The invention belongs to the technical field of core acquisition, and particularly relates to a press-in type rope coring device.
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. During the drilling process, the temperature of the drill bit is reduced through the circulation of the drilling fluid, the rock debris is carried out of the drilled hole, and meanwhile, the core column 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 in shallow regions of the ocean, the core taking rate often does not reach the standard, so that the number of lost strata is large, 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
In order to solve all or part of the problems, the invention aims to provide a press-in type rope coring device, which can effectively improve the core acquisition quality and the core recovery rate.
The application provides a forced rope coring device, including sealing connection in proper order: the joint assembly is provided with a water inlet hole, a liquid channel is formed inside the joint assembly, and the joint assembly is constructed to be capable of being in sealing butt joint with a seat ring of an external drilling tool assembly; a driving assembly formed with a hydraulic chamber therein communicating with the liquid passage, the driving assembly including an outer assembly and an inner assembly, wherein the inner assembly includes: a connecting pull rod arranged along the axial direction; the piston type moving component is hermetically and slidably arranged between the connecting pull rod and the external assembly, the piston type moving component hermetically divides the hydraulic chamber into an upper chamber and a lower chamber, and one end of the connecting pull rod is fixed on the joint component; the connecting transition part is hermetically and slidably sleeved on the connecting pull rod, the connecting transition part is hermetically and fixedly connected with the piston type moving assembly and is positioned in the lower cavity, the connecting transition part and the connecting pull rod extend to the outside of the external assembly in a sealing manner, a medium channel communicated with the lower cavity is formed in the external assembly, and the medium channel can be switched on and off; and the coring assembly is fixedly connected with the connecting transition part and is arranged to move along the axial direction under the drive of the piston type motion assembly.
In some embodiments, the external assembly comprises a pull rod locking joint, a starting joint, a sealing outer cylinder and a lower sealing joint which are fixedly connected in a sealing manner in sequence, the pull rod locking joint is fixedly connected with the joint component, and the hydraulic chamber is communicated with the liquid channel through a gap between the pull rod locking joint and the connecting pull rod; the connecting transition part and the connecting pull rod penetrate through the lower sealing joint and extend to the outside, and a medium channel is formed on the lower sealing joint; a pressure relief hole is formed in a preset position on the sealing outer cylinder.
In some embodiments, the outer assembly further comprises a protective cylinder fixedly connected to the lower sealing joint, the coring assembly is disposed inside the protective cylinder, and a plurality of drainage holes are formed in the protective cylinder.
In some embodiments, the outer assembly further comprises a stationary piston fixedly attached to an end of the connecting rod, with the stationary piston being sealingly disposed within the interior of the coring assembly.
In some embodiments, the coring assembly comprises: the core taking pipe joint is fixedly connected with the connecting transition part, and the core taking pipe joint is arranged on the connecting pull rod in a sealing manner; and the core tube is detachably connected with the core tube joint, one end of the core tube is sleeved on the core tube joint, and the fixed piston is arranged in the core tube in a sealing and sliding manner.
In some embodiments, a plurality of radial hanging threaded holes are uniformly distributed in the circumferential direction of the core tube joint, hanging holes matched with the hanging threaded holes are formed in the core tube, and the hanging holes are detachably connected with the core tube joint through core tube hanging nails.
In some embodiments, the piston motion assembly comprises: the annular piston is hermetically sleeved on the connecting pull rod in a sliding manner, and the connecting transition part is fixedly connected with the annular piston; the starting sleeve is sleeved on the connecting pull rod, meanwhile, the starting sleeve is positioned in the upper cavity, one end of the starting sleeve is hermetically and slidably connected with the pull rod locking joint, the other end of the starting sleeve is hermetically and slidably connected with the starting joint, a gap is formed between the starting sleeve and the connecting pull rod, and an annular clamping space is formed between the starting sleeve and the starting joint; and one end of the core tube locking joint is fixedly connected with the annular piston in a sealing way, and the other end of the core tube locking joint is clamped in the annular clamping space through the clamping jaw.
In some embodiments, a plurality of radial positioning threaded holes are uniformly formed in the starting joint along the circumferential direction, the positioning threaded holes are used for being in threaded connection with a positioning sleeve, a plurality of disc springs and positioning balls are installed in the positioning sleeve, an annular groove is formed in the outer circumferential wall of the starting sleeve, and the positioning balls are in detachable elastic abutting connection with the annular groove.
In some embodiments, the joint assembly comprises a water inlet joint, a double female joint and a matching long cylinder which are sequentially and fixedly connected in a sealing manner, wherein a plurality of water inlet holes are formed in the water inlet joint, the water inlet holes are selectively in threaded connection with the ground test joint and/or the water inlet plug, an annular tool shoulder is formed on the outer peripheral wall of the water inlet joint, and the annular tool shoulder is used for being in sealing abutment with a seat ring of the drilling tool assembly; the pull rod locking joint is fixedly connected with the matched length cylinder in a sealing mode, a liquid channel communicated with the hydraulic chamber is formed at one end, connected with the pull rod locking joint, of the matched length cylinder, and the connecting pull rod is fixedly connected to the end portion of the matched length cylinder.
In some embodiments, the fishing device further comprises a fishing mechanism, one end of the fishing mechanism is provided with a fishing spearhead, and the other end of the fishing mechanism is provided with a connecting rod which is used for being fixedly connected with the joint component.
The press-in type rope coring device of the present invention has the following advantages: 1) The press-in type rope coring device adopts a piston type sampling mode, the operation process is safe and reliable, compared with the prior art, the operation is simple, the time and the labor are saved, and the high-quality coring and the high-harvest-rate core of the deep water surface layer weak stratum can be effectively realized; 2) The press-in type rope coring device can adjust the pressure by adjusting the number of the positioning sleeves and the number of the disc springs; 3) After the sampling of the press-in type rope coring device is finished, the press-in type rope coring device can press the lower cavity to push the annular piston to move upwards, and the core is pushed out of the coring pipe to finish the coring operation.
Drawings
FIG. 1 is a schematic cross-sectional view of a press-in wireline coring apparatus according to an embodiment of the present invention;
FIG. 2 isbase:Sub>A schematic cross-sectional view along A-A of the press-in cord coring apparatus of FIG. 1;
FIG. 3 is a cross-sectional structural schematic view of a joint assembly according to an embodiment of the present invention;
FIG. 4 is a cross-sectional structural view of a drive assembly of an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a coring assembly according to an embodiment of the present invention.
Detailed Description
For a better understanding of the objects, structure and function of the invention, a press-in cord coring apparatus of the present invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a press-in cord coring apparatus 100 according to an embodiment of the present invention. Referring to fig. 1, the press-in type wire coring apparatus 100 includes: a connector assembly 10, wherein a water inlet hole 101 is formed on the connector assembly 10, a liquid channel 102 is formed inside the connector assembly 10, and the connector assembly 10 is configured to be in sealing contact with a seat ring of an external drilling assembly; a driving unit 20 having a hydraulic chamber 201 formed therein to communicate with the fluid passage 102, the driving unit 20 including an outer assembly 21 and an inner assembly 22, wherein the inner assembly 22 includes: a connecting rod 221 disposed along the axial direction; a piston type motion assembly 222 which is hermetically and slidably arranged between the connecting pull rod 221 and the external assembly 21, wherein the piston type motion assembly 222 hermetically divides the hydraulic chamber 201 into an upper chamber 201a and a lower chamber 201b, and one end of the connecting pull rod 221 is fixed on the joint assembly 10; the connecting transition part 223 is hermetically and slidably sleeved on the connecting pull rod 221, the connecting transition part 223 is hermetically and fixedly connected with the piston type motion assembly 222 and is positioned in the lower chamber 201b, the connecting transition part 223 and the connecting pull rod 221 extend to the outside of the external assembly 21 in a sealed manner, a medium channel 224 communicated with the lower chamber 201b is formed on the external assembly 21, and the medium channel 224 is set to be capable of being switched on and off; and a coring assembly 30 fixedly connected to the connecting transition portion 223, the coring assembly 30 being configured to be axially movable by the piston-type motion assembly 222.
When the press-in type wire line core drilling device 100 of the embodiment of the invention is used specifically, after the press-in type wire line core drilling device 100 is lowered to a position in a drill string from a wellhead, the joint component 10 is seated on a seat ring of a bottom hole assembly, and meanwhile, the joint component 10 is matched with the seat ring of the bottom hole assembly to realize sealing and abutting. After the sealing and abutting, the drilling fluid cannot move downwards, and can only enter the press-in type rope core device 100 through the water inlet 101, namely, the drilling fluid enters the upper chamber 201a of the hydraulic chamber 201 through the water inlet 101 and the liquid channel 102 in sequence. The pressure in the upper chamber 201a increases, pushing the piston assembly 222 downward relative to the connecting rod 221 to bring the connecting transition 223 downward. The end-mounted coring assembly 30 of the junction transition 223 is able to descend under the push of the junction transition 223 to eventually be pressed into the formation for sampling. After sampling, the pressure in the upper chamber 201a is relieved by any pressure relief method, for example, by providing the pressure relief hole 2131 or by relieving the pressure through the water inlet hole 101, and meanwhile, a hydraulic medium is input into the lower chamber 201b through the medium channel 224, so as to increase the pressure in the lower chamber 201 b. Under the action of the pressure difference, the piston-type motion assembly 222 is pushed to move upwards relative to the connecting pull rod 221, and in the process of moving upwards, the coring assembly 30 can move upwards under the driving of the piston-type motion assembly 222 so as to finish sampling. After sampling is completed, the entire press-in type wire coring apparatus 100 is salvaged. The salvaged core is removed by the coring assembly 30, and finally the coring operation is completed.
The press-in type rope coring device 100 of the embodiment of the invention adopts a piston type sampling mode, has safe and reliable operation process, is simple to operate, saves time and labor, and can effectively realize high-quality coring and high-harvest-rate core of a deep water weak stratum.
Referring to fig. 1 and 4, in some embodiments, the outer assembly 21 may include a pull rod locking joint 211, a starting joint 212, a sealing outer cylinder 213 and a lower sealing joint 214 which are fixedly connected in a sealing manner in sequence, the pull rod locking joint 211 is fixedly connected with the joint component 10, and the hydraulic chamber 201 is communicated with the liquid passage 102 through a gap between the pull rod locking joint 211 and the connecting pull rod 221; the connection transition 223 and the connection tension rod 221 extend through the lower sealing joint 214 to the outside, and the medium passage 224 is formed on the lower sealing joint 214; a pressure relief hole 2131 is formed at a predetermined position on the outer seal cylinder 213.
When the press-in type rope coring device 100 of the embodiment of the invention is used specifically, the pressure relief hole 2131 is formed in the preset position on the sealing outer cylinder 213, and when the piston type motion assembly 222 is pushed to move downwards relative to the connecting pull rod 221, the position of the arranged pressure relief hole 2131 can be used for determining that the coring assembly 30 is completely pressed into the stratum for sampling, namely, the pressure relief hole 2131 plays a role in timely completing pressure relief so as to prevent the piston type motion assembly 222 from moving downwards any more.
Referring to fig. 1 and 5, in some embodiments, the outer assembly 21 may further include a protective cylinder 215 fixedly connected to the lower sealing joint 214, the coring assembly 30 is disposed inside the protective cylinder 215, and a plurality of water drainage holes 2151 are formed in the protective cylinder 215. With this arrangement, the protective cylinder 215 can effectively prevent the problem of the bending of the coring assembly 30 caused by the collision of the press-in cord coring apparatus 100 during the lowering.
Referring to fig. 1 and 5, in some embodiments, the outer assembly 21 may further include a fixed piston 216, and the fixed piston 216 is fixedly connected to an end of the connecting rod 221 and is sealingly disposed inside the coring assembly 30.
In the initial state of the press-in cord coring apparatus 100 of the present embodiment, the stationary piston 216 of the present application may be disposed such that the bottom surface is substantially flush with the bottom surface of the coring assembly 30. In the process of forming the core, the fixed piston 216 always contacts with the core to ensure that no liquid is arranged at the upper end of the core, so that in the process of lifting the press-in type rope core taking device 100, when the core possibly falls down due to gravity, suction negative pressure is formed between the fixed piston 216 and the core, the core is effectively prevented from falling down, and the core harvesting rate is increased. After sampling, the pressure relief hole 2131 can be sealed by a plug, and then the pressure is pressed into the lower chamber 201b through the medium channel 224 to push the piston type moving assembly 222 to move upwards, and as the fixed piston 216 is fixed, the core is pushed out from the coring assembly 30, so that coring operation is completed.
Referring to fig. 1 and 5, in some embodiments, the coring assembly 30 may include: the coring pipe joint 31 is fixedly connected with the connecting transition part 223, and the coring pipe joint 31 is hermetically sleeved on the connecting pull rod 221; and a core tube 32 detachably connected to the core tube connector 31, one end of the core tube 32 being fitted over the core tube connector 31, and the fixed piston 216 being sealingly and slidably disposed inside the core tube 32.
Referring to fig. 5, in some embodiments, the core tube coupler 31 has a plurality of radial hooking threaded holes 311 uniformly distributed along the circumferential direction, the core tube 32 has a hanging hole 321 formed therein and matching with the hooking threaded holes 311, and the hanging hole 321 is detachably connected to the core tube coupler 31 by a core tube hanging nail.
Through the above arrangement, the core tube 32 is hung on the core tube connector 31 through the core tube hanging nail, and the core tube 32 can be separated from the core tube connector 31 when all threads of the core tube hanging nail are screwed to the bottom, so that the core tube 32 and the middle core are transferred away, and the core tube 32 is convenient to install and detach. In the present application, in order to reduce the resistance to entering the ground, the core barrel 32 is a thin-walled tube material, and the thin-walled tube material can effectively prevent the problem of bending caused by collision of the press-in type rope core apparatus 100 in the lowering process under the protection of the protective cylinder 215.
In this application, for effect and test adjustment starting pressure are stretched out to coring pipe 32 of ground test forced rope coring device 100, can seal with the plug for the water inlet on the subassembly 10 that connects on ground, only leave a water inlet and connect ground test joint 14, connect the force pump, annotate the pressure test.
Referring to fig. 1 and 4, in some embodiments, the piston assembly 222 may include: the annular piston 41 is sleeved on the connecting pull rod 221 in a sealing and sliding manner, and the connecting transition part 223 is fixedly connected with the annular piston 41; the starting sleeve 42 is sleeved on the connecting pull rod 221, meanwhile, the starting sleeve 42 is positioned in the upper chamber 201a, one end of the starting sleeve 42 is hermetically and slidably connected with the pull rod locking connector 211, the other end of the starting sleeve 42 is hermetically and slidably connected with the starting connector 212, a gap is formed between the starting sleeve 42 and the connecting pull rod 221, and an annular clamping space 421 is formed between the starting sleeve 42 and the starting connector 212; and a core barrel locking joint 43, one end of which is fixedly connected with the annular piston 41 in a sealing way, and the other end of which is clamped in the annular clamping space 421 through a clamping claw.
The connection transition 223 mentioned in the present application may be configured as a push-pull barrel. In the initial state of the press-in type wire core apparatus 100 according to the embodiment of the present invention, the core barrel locking joint 43 is engaged in the annular engaging space 421 by the jaws to position the annular piston 41 without pressure. When the pressure in the upper chamber 201a rises, the pressure difference between the upper and lower end surfaces of the actuating sleeve 42 causes the actuating sleeve 42 to move upward, and when the actuating sleeve 42 moves upward to the top dead center, that is, the top surface of the actuating sleeve 42 contacts with the inner step of the drawbar locking tab 211, and since the pressure is always present, the actuating sleeve 42 is always at the top dead center during the operation of the push-in cord coring apparatus 100, and at the same time, the annular clamping space 421 is released. After the starting sleeve 42 moves upwards to the top dead center, the annular piston pulls the core barrel locking connector 43 downwards under the action of downward thrust generated by hydraulic pressure, and the claws on the core barrel locking connector 43 can contract inwards due to no internal blockage and are separated from the annular clamping space 421 formed by the starting connector 212 and the starting sleeve 42, so that the core barrel locking connector 43, the annular piston, the push-pull cylinder, the core barrel connector 31 and the core barrel 32 can be pressed downwards into the stratum for sampling.
The jaws on the core barrel locking sub 43 referred to in this application may be configured so that the free ends can be retracted inwardly under pressure and reset after the pressure is released.
Referring to fig. 1, 2 and 4, in some embodiments, a plurality of radial positioning threaded holes 2121 may be uniformly formed in the actuating connector 212 along a circumferential direction, a positioning sleeve 2122 is disposed in the positioning threaded holes 2121 for being screwed into the positioning sleeve 2122, a plurality of disc springs 2123 and positioning balls 2124 are disposed in the positioning sleeve 2122, an annular groove 421 is formed on an outer circumferential wall of the actuating sleeve 42, and the positioning balls 2124 are detachably and elastically abutted against the annular groove 421.
When the press-in type rope coring device 100 of the embodiment of the present invention is in the initial state, the core barrel locking joint 43 is clamped in the annular clamping space 421 by the jaws, when the upward thrust of the upper chamber 201a is greater than the elastic force generated by the disc spring 2123 in the positioning sleeve 2122, the positioning ball 2124 will be released from the annular groove 421 of the starting sleeve 42, and move upward to the top dead center, i.e., the top surface of the starting sleeve 42 contacts with the inner step of the pull rod locking joint 211, the starting pressure is also the tool in-place alarm pressure, and the pressure can be adjusted by adjusting the number of the positioning sleeves 2122 and the number of the disc springs 2123.
Referring to fig. 1 and 3, in some embodiments, the joint assembly 10 may include a water inlet joint 11, a double female joint 12 and an extension tube 13, which are sequentially and fixedly connected in a sealing manner, wherein a plurality of water inlet holes 101 are formed on the water inlet joint 11, the water inlet holes 101 are selectively in threaded connection with a ground test joint 14 and/or a water inlet plug, an annular tool shoulder 15 is formed on an outer peripheral wall of the water inlet joint 11, and the annular tool shoulder 15 is used for being in sealing abutment with a seat ring of a drilling assembly; the pull rod locking joint 211 is fixedly connected with the length matching barrel 13 in a sealing way, a liquid channel 102 communicated with the hydraulic chamber 201 is formed at one end of the length matching barrel 13 connected with the pull rod locking joint 211, and the connecting pull rod 221 is fixedly connected with the end part of the length matching barrel 13.
Referring to fig. 1, in some embodiments, the fishing device further includes a fishing mechanism 50, wherein one end of the fishing mechanism 50 is provided with a fishing spear 51, and the other end is provided with a connecting rod 52, and the connecting rod 52 is used for being fixedly connected with the joint assembly 10.
It should be noted that the fishing mechanism 50 of the present application can be used with the fishing mechanism 50 of the prior art. It is simply connected to the joint assembly 10. The term "sealing connection" and "sealing fastening" as used in this application is understood to mean a connection and fastening which is sealed at the same time as the sealing ring is used. The relatively sliding parts mentioned in this application may be provided with wear rings to improve the wear resistance.
As described above, referring to fig. 1, the press-in type wire coring apparatus 100 according to the embodiment of the present invention is used in the following manner:
after the tool is put down in place in a drill string from a wellhead, namely when the tool lifting shoulder 15 of the water inlet connector 11 is located on a seat ring of a bottom drilling tool assembly, drilling fluid cannot go down because an outer sealing ring at the lower part of the tool lifting shoulder 15 is matched with the seat ring, and only can enter the inside of a sampling tool through water inlets uniformly distributed on the water inlet connector 11. Through the water through hole on the upper joint of the pull rod, and enters a hydraulic chamber 201 formed by the piston inner seal of the annular piston 41.
When the upward thrust is greater than the elastic force generated by the disc spring 2123 in the positioning sleeve 2122, the positioning ball 2124 will be disengaged from the annular groove 421 of the starting sleeve 42 and move upward to the top dead center, i.e., the top surface of the starting sleeve 42 contacts with the inner step of the pull rod locking joint 211, and the starting sleeve 42 is always at the top dead center during the operation of the push-in type rope coring apparatus 100 because the pump pressure is always present. The starting pressure is also the pressure for the in-place alarm of the press-in type rope coring device 100, and the pressure can be adjusted by adjusting the number of the positioning sleeves 2122 and the number of the disc springs 2123.
After the starting sleeve 42 moves upwards to the top dead center, the annular piston 41 pulls the core barrel locking joint 43 downwards under the action of downward thrust generated by pumping pressure, and the jaws on the core barrel locking joint 43 can contract inwards due to no internal blockage and are separated from the annular clamping space 421 formed by the starting joint 212 and the starting sleeve 42, so that the core barrel locking joint 43, the annular piston 41, the push-pull cylinder, the core barrel joint 31 and the core barrel 32 can move downwards and be pressed into the stratum for sampling.
When the annular piston 41 descends to the outside of the piston and is sealed beyond the pressure relief hole 2131, pressure relief is carried out, the pump pressure is reduced, the core barrel 32 is completely pressed into the ground, sampling is completed, and the back-pressed rope core device 100 can be salvaged.
After sampling, the pressure relief hole 2131 can be sealed by a drain hole plug, then the ground test joint 14 is connected to the drain hole 2151, the pressure pump is connected, pressure is exerted in the lower cavity, the annular piston 41 is pushed to move upwards, and the core is pushed out from the coring pipe 32 because the fixed piston 216 is still, so that coring operation is completed.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "upper", "lower", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the present invention.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A press-in cord coring apparatus, comprising in sequence sealing connection:
a connector assembly having a water inlet formed therein, a fluid passage formed within the connector assembly, the connector assembly configured to sealingly abut a seat ring of an external drilling assembly;
a driving assembly having a hydraulic chamber formed therein to communicate with the liquid passage, the driving assembly including an outer assembly and an inner assembly, wherein the inner assembly includes: a connecting pull rod arranged along the axial direction; the piston type motion assembly is arranged between the connecting pull rod and the external assembly in a sealing and sliding mode, the piston type motion assembly divides the hydraulic chamber into an upper chamber and a lower chamber in a sealing mode, and one end of the connecting pull rod is fixed on the joint assembly; the connecting transition part is hermetically and slidably sleeved on the connecting pull rod, the connecting transition part is hermetically and fixedly connected with the piston type moving assembly and is positioned in the lower cavity, the connecting transition part and the connecting pull rod extend to the outside of the external assembly in a sealing manner, a medium channel communicated with the lower cavity is formed in the external assembly, and the medium channel can be switched on and off; and
and the coring assembly is fixedly connected with the connecting transition part and can move axially under the driving of the piston type motion assembly.
2. The press-in cord coring apparatus of claim 1, wherein the outer assembly comprises a pull rod locking joint, an activation joint, a sealing outer cylinder, and a lower sealing joint, which are sealingly fixedly connected in sequence, the pull rod locking joint being fixedly connected to the joint assembly, the hydraulic chamber being in communication with the liquid passage through a gap between the pull rod locking joint and the connecting pull rod; the connecting transition part and the connecting pull rod penetrate through the lower sealing joint to extend to the outside, and the medium channel is formed on the lower sealing joint; and a pressure relief hole is formed in a preset position on the sealing outer cylinder.
3. The apparatus of claim 2, wherein the outer assembly further comprises a protective cylinder fixedly attached to the lower seal sub, the coring assembly is disposed inside the protective cylinder, and a plurality of drainage holes are formed in the protective cylinder.
4. The press-in cord coring apparatus of claim 3, wherein the outer assembly further comprises a stationary piston fixedly connected to an end of the connecting rod, while the stationary piston is sealingly disposed within the interior of the coring assembly.
5. The push-in cord coring device of claim 4, wherein the coring assembly comprises:
the core tube joint is fixedly connected with the connecting transition part and is hermetically sleeved on the connecting pull rod; and
with the coring pipe that connects can dismantle the connection, the one end cover of coring pipe is located on the coring pipe joint, fixed piston seal and slidable set up in the inside of coring pipe.
6. The press-in type rope coring device of claim 5, wherein the coring pipe joint is circumferentially and uniformly provided with a plurality of radial hooking threaded holes, the coring pipe is formed with a hanging hole matching with the hooking threaded holes, and the hanging hole is detachably connected with the coring pipe joint through a coring pipe hanging nail.
7. The press-in cord coring apparatus of any one of claims 1-6, wherein the piston-type motion assembly comprises:
the annular piston is hermetically sleeved on the connecting pull rod in a sliding manner, and the connecting transition part is fixedly connected with the annular piston;
the starting sleeve is sleeved on the connecting pull rod, is positioned in the upper cavity, is hermetically and slidably connected with the pull rod locking joint at one end and is hermetically and slidably connected with the starting joint at the other end, a gap is formed between the starting sleeve and the connecting pull rod, and an annular clamping space is formed between the starting sleeve and the starting joint; and
and one end of the core tube locking joint is fixedly connected with the annular piston in a sealing manner, and the other end of the core tube locking joint is clamped in the annular clamping space through a clamping jaw.
8. The press-in type rope coring device of claim 7, wherein a plurality of radial positioning threaded holes are uniformly formed in the starting joint along the circumferential direction, the positioning threaded holes are used for being in threaded connection with a positioning sleeve, a plurality of disc springs and positioning balls are installed in the positioning sleeve, an annular groove is formed in the outer circumferential wall of the starting sleeve, and the positioning balls are in detachable elastic abutment with the annular groove.
9. The press-in wireline coring apparatus of any one of claims 1-6, wherein the joint assembly comprises a water inlet joint, a double female joint and an extension barrel, which are sequentially and fixedly connected in a sealing manner, wherein the water inlet joint is provided with a plurality of water inlet holes, the water inlet holes are selectively in threaded connection with a ground test joint and/or a water inlet plug, the outer peripheral wall of the water inlet joint is provided with an annular tool shoulder, and the annular tool shoulder is used for being in sealing abutment with a seat ring of a drilling tool assembly; the pull rod locking joint is fixedly connected with the length matching barrel in a sealing mode, a liquid channel communicated with the hydraulic chamber is formed in one end, connected with the pull rod locking joint, of the length matching barrel, and the connecting pull rod is fixedly connected to the end portion of the length matching barrel.
10. A push-in wireline coring device according to any of claims 1-6, further comprising a fishing mechanism having a fishing spearhead at one end and a connecting rod at the other end, the connecting rod for secure connection with the joint assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211211098.6A CN115538965A (en) | 2022-09-30 | 2022-09-30 | Press-in type rope coring device |
Applications Claiming Priority (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116818410A (en) * | 2023-07-12 | 2023-09-29 | 浙江华东岩土勘察设计研究院有限公司 | Water area rope salvaging type geological sample sampling device and working method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116818410A (en) * | 2023-07-12 | 2023-09-29 | 浙江华东岩土勘察设计研究院有限公司 | Water area rope salvaging type geological sample sampling device and working method |
| CN116818410B (en) * | 2023-07-12 | 2023-12-08 | 浙江华东岩土勘察设计研究院有限公司 | Water area rope salvaging type geological sample sampling device and working method |
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