CN114658378A - Directional coring tool and drilling machine valve control assembly thereof - Google Patents
Directional coring tool and drilling machine valve control assembly thereof Download PDFInfo
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- CN114658378A CN114658378A CN202210498744.5A CN202210498744A CN114658378A CN 114658378 A CN114658378 A CN 114658378A CN 202210498744 A CN202210498744 A CN 202210498744A CN 114658378 A CN114658378 A CN 114658378A
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- Prior art keywords
- valve
- shell
- drilling fluid
- drilling
- packer
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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
- E21B25/16—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors for obtaining oriented cores
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
Abstract
The invention discloses a directional coring tool and a drilling machine valve control assembly thereof, relating to the technical field of geological exploration directional coring tools, wherein the drilling machine valve control assembly comprises: the packer comprises a control valve for controlling whether drilling fluid flows or not according to the pressure of the drilling fluid, a valve shell for installing the control valve, a packer shell connected with the valve shell, rubber, a clamping plate and a wing plate, wherein the rubber can spontaneously expand when encountering the drilling fluid, is in an annular structure and is positioned between the end part of the valve shell and the end part of the packer shell, and the valve shell and the inner peripheral part of the packer shell are provided with shells of directional coring tools; the clamping plate and the wing plate are symmetrically arranged between the outer peripheral part of the rubber and the inner peripheral part of the packer shell, a flow channel for flowing drilling fluid is arranged in the valve shell, when the pressure of the drilling fluid is greater than preset pressure, the control valve is opened, and when the pressure of the drilling fluid is less than or equal to the preset pressure, the control valve is closed. The device can effectively prevent the drilling tool from rotating when drilling.
Description
Technical Field
The invention relates to the technical field of geological exploration directional coring tools, in particular to a drilling machine valve control assembly. In addition, the directional coring tool comprises the drilling machine valve control assembly.
Background
At present, bearing assembly design schemes for directional drilling at home and abroad have certain defects in function or structure and cannot adapt to a directional coring operation environment. For example, the prior art discloses a mechanical quasi-static pushing vertical drilling tool for coring, which comprises two major parts, namely a stable platform and an actuating mechanism, wherein the actuating mechanism comprises an actuating main body and a plurality of pushing wing ribs, the actuating mechanism can keep non-rotation or slow rotation in the deviation correction process, compared with the situation that the pushing wing ribs of a dynamic pushing drilling tool rotate synchronously with a drilling head, the abrasion rate of the pushing wing ribs can be effectively reduced, the service life of the tool is prolonged, in the deviation correction process, the pushing wing ribs on the high side of a well bore are always in an open state, no lag time exists, the pushing force response is rapid, and the tool can be matched with a drill bit to be used under the high-rotation-speed working condition. However, the execution main body is internally provided with the installation groove and the flow passage, so that the requirement on the cleanliness of hydraulic oil is very high.
In addition, the prior art also discloses a rotary steering tool for drilling, which comprises a pair of hollow joints which are arranged up and down and are butted, wherein the hollow joints are provided with a thread head section and a light pipe section which are of an integral structure, the thread head sections of the upper hollow joint and the lower hollow joint are reversely arranged, the light pipe sections of the upper hollow joint and the lower hollow joint are respectively provided with a rolling bearing, the outer periphery of the rolling bearing is sleeved with an outer sleeve, and the outer sleeve is supported on the rolling bearing; three hollow windows which are circumferentially arranged are arranged on the outer sleeve, each hollow window is provided with a supporting block, each supporting block is provided with a hydraulic cylinder, and the hydraulic cylinders drive the supporting blocks to extend out along the hollow windows and lean against the well wall by taking the mud pressure difference between the inside and the outside of the drill string as power; the drilling rotary steerable tool has steering capabilities with the drill string rotating. However, the rotary steering of the structure is realized by adopting a manual directional method, and the drilling rotary steering tool cannot be used for core drilling operation.
In summary, how to prevent the casing from rotating during drilling is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention is directed to a valve control assembly for a drilling machine, which can effectively prevent a casing from rotating during drilling.
It is another object of the present invention to provide a directional coring tool that includes the above-described drill valve assembly.
In order to achieve the above purpose, the invention provides the following technical scheme:
a drilling rig valve control assembly comprising: the packer comprises a control valve for controlling whether drilling fluid flows or not according to the pressure of the drilling fluid, a valve housing for mounting the control valve, a packer housing connected with the valve housing, rubber, a clamping plate and a wing plate, wherein the rubber can spontaneously expand when meeting the drilling fluid, the rubber is in an annular structure and is positioned between the end part of the valve housing and the end part of the packer housing, and the valve housing and the packer housing can form a shell of a directional coring tool;
the clamping plate and the wing plate are symmetrically arranged between the outer peripheral part of the rubber and the inner peripheral part of the packer shell, a flow channel for flowing the drilling fluid is arranged in the packer shell, when the pressure of the drilling fluid is greater than a preset pressure, the control valve is opened, and when the pressure of the drilling fluid is less than or equal to the preset pressure, the control valve is closed.
Preferably, the control valve comprises a valve block shell, a valve cover for covering the valve block shell, a compression spring and a valve core, wherein one end of the valve core is tightly attached to the valve port of the valve block shell, the other end of the valve core is provided with the compression spring, and the other end of the compression spring is tightly attached to the valve cover.
Preferably, the valve core is of a solid structure, an outer conical surface which is matched and abutted with an inner conical surface of the valve port is arranged at the end part of the valve core, and the valve port is communicated with the flow channel.
Preferably, the valve block shell is sequentially provided with a first hole, a second hole and a third hole along the axial direction so as to form three stepped holes, the first hole is used for being in threaded connection with the valve cover, the second hole is used for providing an installation space for the compression spring and the valve core, and the third hole is communicated with the flow channel.
Preferably, the valve block housing has a side hole in an outer peripheral portion thereof, the side hole communicating with the second hole.
Preferably, a regulating valve connected with the control valve in series and an overflow valve connected with the control valve in parallel are arranged in the valve housing, and the control valve and the overflow valve are both communicated with an inflow port of the drilling fluid;
the regulating valve is a normally open valve, when the pressure of the drilling fluid is greater than or equal to the working pressure of the regulating valve, the regulating valve is closed, and the flow passage can be communicated with the control valve, the regulating valve and the overflow valve.
Preferably, the control valve, the regulating valve, the overflow valve and the valve housing are of an integrated structure.
Preferably, the wing is provided with a diamond coating.
A directional coring tool, comprising: the device comprises a hollow mandrel and a shell sleeved on the periphery of the hollow mandrel, wherein a fulcrum bearing assembly, a biasing assembly and a cantilever bearing assembly are sequentially arranged between the hollow mandrel and the shell from bottom to top;
the drill bit valve control assembly comprises a hollow mandrel, a fulcrum bearing assembly, a biasing assembly, a packer assembly and a drill bit, wherein the lower end of the fulcrum bearing assembly is connected with a drill bit, the upper end of the fulcrum bearing assembly is hinged to the hollow mandrel, the lower end of the cantilever bearing assembly is fixedly connected with the hollow mandrel, the upper end of the cantilever bearing assembly is connected with a drill rod, the biasing assembly is used for adjusting the eccentricity of the hollow mandrel, the outer periphery of a shell is provided with an openable packer assembly, the packer assembly can clamp the shell in a hole wall when the packer assembly is opened, and the packer assembly is any one of the drill bit valve control assembly.
When the drilling machine valve control assembly provided by the invention is used, when the directional coring tool is in a straight drilling state, the control valve is closed, so that the clamping plate and the wing plate are symmetrically distributed between the outer peripheral part of the rubber and the inner peripheral part of the packer shell. When directional coring tool need carry out directional coring drilling operation, the pressure of drilling fluid can increase, when the pressure of drilling fluid surpassed preset pressure, will make the control valve open, meanwhile, in the drilling fluid will flow into rubber through the runner, rubber can be under the effect of drilling fluid spontaneous inflation, and then makes the pterygoid lamina can pass the packer casing and outwards stretch out. Because the clamping plate is fixed on the packer shell, the clamping plate can be fixed in the process that the wing plate extends outwards, so that the wing plate and the clamping plate are asymmetrically distributed on the shell of the directional core drilling tool. When the wing plate is tightly close to the rock wall, the rock wall can be reacted on the directional coring drilling tool, so that the clamping plate is clamped in the rock wall, the shell of the directional coring tool is stabilized, and the drill bit of the directional coring tool can continuously rotate for drilling, thereby ensuring the subsequent directional coring drilling operation effect.
In conclusion, the drilling machine valve control assembly provided by the invention can effectively prevent the shell from rotating when a drilling tool drills.
In addition, the invention also provides a directional coring tool comprising the drilling machine valve control assembly.
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 structural view of a rig valve control assembly provided by the present invention;
FIG. 2 is a schematic structural view of a control valve;
FIG. 3 is a schematic view of the valve block housing;
FIG. 4 is a schematic view of the directional coring tool in a straight line drilling operation;
FIG. 5 is a schematic view of the directional coring tool in a directional drilling operation.
In fig. 1-5:
the packer comprises a control valve 1, a valve shell 2, a packer shell 3, rubber 4, a clamping plate 5, a wing plate 6, a valve block shell 7, a valve cover 8, a compression spring 9, a valve core 10, an outer conical surface 11, an inner conical surface 12, a first hole 13, a second hole 14, a third hole 15, a side hole 16, a regulating valve 17, an overflow valve 18, a hollow mandrel 19, a shell 20, a fulcrum bearing assembly 21, a biasing assembly 22, a cantilever bearing assembly 23, a drill bit 24, a drill rod 25 and a packer assembly 26.
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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The core of the invention is to provide a drilling machine valve control assembly which can effectively prevent a drilling tool from rotating a shell during drilling. Another core of the present invention is to provide a directional coring tool that includes the above-described drill valve assembly.
Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of a drilling rig valve control assembly according to the present invention; FIG. 2 is a schematic structural view of a control valve; FIG. 3 is a schematic view of the valve block housing; FIG. 4 is a schematic view of the directional coring tool in a straight line drilling operation; FIG. 5 is a schematic view of the directional coring tool in a directional drilling operation.
This particular embodiment provides a rig valve control assembly, including: the device comprises a control valve 1 for controlling whether the drilling fluid flows or not according to the pressure of the drilling fluid, a valve housing 2 for installing the control valve 1, a packer housing 3 connected with the valve housing 2, rubber 4, a clamping plate 5 and a wing plate 6, wherein the rubber 4 can spontaneously expand when encountering the drilling fluid, the rubber 4 is in an annular structure and is positioned between the end part of the valve housing 2 and the end part of the packer housing 3, and the valve housing 2 and the packer housing 3 can form a shell 20 of the directional coring tool; the clamping plate 5 and the wing plate 6 are symmetrically arranged between the outer peripheral part of the rubber 4 and the inner peripheral part of the packer shell 3, a flow channel for flowing drilling fluid is arranged in the valve shell 2, when the pressure of the drilling fluid is greater than the preset pressure, the control valve 1 is opened, and when the pressure of the drilling fluid is less than or equal to the preset pressure, the control valve 1 is closed.
It should be noted that, when the directional coring tool performs the directional drilling operation, under the hydraulic driving action, the pressure of the drilling fluid may be greater than the preset pressure, so that the control valve 1 is opened, the drilling fluid may flow into the valve housing 2 and contact with the rubber 4, so that the rubber 4 expands to push out the wing plate 6, and the wing plate 6 abuts against the rock wall, thereby preventing the housing 20 of the directional coring tool from rotating, stabilizing the size of the aperture, and realizing the directional drilling function, and moreover, the rotatable hollow core shaft 19 is arranged inside the housing 20 of the directional coring tool, so that the function of drilling while coring can be realized.
It should also be noted that the rubber 4 is of a circular ring structure, the snap-gauge 5 and the wing plate 6 are symmetrically distributed on the outer surface of the rubber 4, the whole structure formed by the rubber 4, the snap-gauge 5 and the wing plate 6 is embedded in the second hole 14 of the packer housing 3, and the packer housing 3 is provided with a through hole so that the wing plate 6 penetrates through the packer housing 3 and extends outwards. Since the catch plate 5 is fixed to the packer housing 3, the catch plate 5 can be fixed in place during the outward extension of the wings 6. Further, the packer housing 3 and the valve housing 2 may be screwed together by providing an internal thread on the inner peripheral portion of the packer housing 3 and an external thread on the outer peripheral portion of the valve housing 2. Moreover, rubber 4 can be arranged at the end part of the packer shell 3 and the inner circumferential end part of the valve shell 2, so that the device structure is simpler and more compact, and the drilling fluid flowing out of the valve shell 2 can be ensured to be contacted with the rubber 4, so that the wing plates 6 extend out of the packer shell 3.
The shape, structure, size, material, position and the like of the control valve 1, the valve housing 2, the packer housing 3, the rubber 4, the snap-gauge 5 and the wing plate 6 can be determined according to actual conditions and actual requirements in the actual application process.
When the drilling machine valve control assembly provided by the invention is used, when the directional coring tool is in a straight drilling state, the control valve 1 is closed, so that the clamping plates 5 and the wing plates 6 are symmetrically distributed between the outer peripheral part of the rubber 4 and the inner peripheral part of the packer shell 3. When the directional coring tool needs to perform the directional coring drilling operation, the pressure of the drilling fluid can be increased, when the pressure of the drilling fluid exceeds the preset pressure, the control valve 1 is opened, meanwhile, the drilling fluid flows into the rubber 4 through the flow channel, the rubber 4 can be spontaneously expanded under the action of the drilling fluid, and then the wing plate 6 penetrates through the packer shell 3 and extends outwards. Since the catch plate 5 is fixed to the packer housing 3, the catch plate 5 can be fixed during the outward extension of the wing plate 6 so that the wing plate 6 and catch plate 5 are asymmetrically distributed on the housing 20 of the directional core drilling tool. When the wing 6 abuts the rock wall, the rock wall will act against the directional coring tool such that the catch plate 5 snaps into the rock wall, thereby stabilizing the housing 20 of the directional coring tool, while the bit 24 of the directional coring tool can continue to rotate for continued directional coring operation.
In conclusion, the drilling machine valve control assembly provided by the invention can effectively prevent the shell from rotating when a drilling tool drills.
On the basis of the above embodiment, preferably, the control valve 1 includes a valve block case 7, a valve cover 8 for covering the valve block case 7, a compression spring 9 and a valve core 10, one end of the valve core 10 is tightly attached to the valve port of the valve block case 7, the other end of the valve core 10 is provided with the compression spring 9, and the other end of the compression spring 9 is tightly attached to the valve cover 8, and the structure is as shown in fig. 2.
It should be noted that, in the free state, the valve core 10 can effectively block the valve port under the action of the compression spring 9. And, compression spring 9's one end is placed at the upper surface of case 10, and compression spring 9's the other end closely laminates with valve gap 8's lower surface, makes valve gap 8 and case 10 all closely laminate for face-to-face with compression spring 9 like this for the fine effect of compression spring 9's resilience force is on case 10 and valve gap 8, and valve gap 8 is fixed motionless, consequently, compression spring 9 can effectively drive case 10 and reset.
It should be further noted that the valve block housing 7 can integrate the valve core 10, the valve cover 8 and the compression spring 9 into a whole, so that the overall size of the control valve 1 is small, and the control valve is particularly suitable for a small-diameter directional core drill and is convenient to install and operate. And, there is the runner in the valve block shell 7, can supply the drilling fluid to pass through freely, through adopting drilling fluid drive control valve 1 switching, the cleanliness requirement to the hydraulic pressure environment is lower, can improve directional coring tool's work efficiency.
Preferably, the valve core 10 is a solid structure, and the end of the valve core 10 is provided with an outer conical surface 11 which is in matched and abutted contact with an inner conical surface 12 of the valve port, and the valve port is communicated with the flow channel.
It should be noted that, the outer surface of the valve core 10 is provided with an external conical surface 11, and the external conical surface 11 can be tightly matched with the internal conical surface 12 of the valve port to ensure that the valve core 10 effectively blocks the valve port. Since the valve port is communicated with the flow passage, when the valve core 10 is far away from the valve port, the drilling fluid can flow into the valve block shell 7 through the valve port and the flow passage.
Preferably, the valve block housing 7 is provided with a first hole 13, a second hole 14 and a third hole 15 in sequence along the axial direction to form a three-step stepped hole, the structure is as shown in fig. 3, the first hole 13 is used for being in threaded connection with the valve cover 8, the second hole 14 is used for providing an installation space for the compression spring 9 and the valve core 10, and the third hole 15 is communicated with the flow passage. For example, an internal thread may be provided on an inner peripheral portion of the first hole 13, and an external thread may be provided on an outer peripheral portion of the bonnet 8, so that the bonnet 8 and the first hole 13 are threadedly engaged. And the second hole 14 is used for providing space for the compression spring 9 and the valve core 10 so that the valve core 10 moves upwards to open the valve port or moves downwards to close the valve port. The third bore 15 communicates with the flow passage to facilitate the circulation of drilling fluid.
Preferably, the valve block housing 7 is provided with a side hole 16 communicating with the second hole 14 at the outer periphery thereof, and when the valve port is opened, drilling fluid can flow into the second hole 14 of the valve block housing 7 and then flow out of the side hole 16, and then the drilling fluid can flow to the rubber 4, and the rubber 4 can expand spontaneously when encountering the drilling fluid, so that the flap 6 can extend out of the packer housing 3.
It should be added that the maximum compression amount of the compression spring 9 is the opening pressure P1 of the control valve 1, when the pressure of the drilling fluid is less than P1, the control valve 1 is closed, the drilling fluid cannot flow into the third hole 15, and the wing plate 6 is in a normal state and does not extend out of the packer housing 3; when the pressure of the drilling fluid is greater than or equal to P1, the control valve 1 is opened, the drilling fluid can compress the elastic force of the spring 9, flow from the third hole 15 into the second hole 14 and flow out from the side hole 16, then the drilling fluid can flow to the rubber 4, and the rubber 4 can expand spontaneously when encountering the drilling fluid, so that the wing plates 6 extend out of the packer shell 3.
On the basis of the above embodiment, preferably, the valve housing 2 is provided with a regulating valve 17 connected in series with the control valve 1 and an overflow valve 18 connected in parallel with the control valve 1, and both the control valve 1 and the overflow valve 18 are communicated with the inflow port of the drilling fluid; the regulating valve 17 is a normally open valve, when the pressure of the drilling fluid is greater than or equal to the working pressure of the regulating valve 17, the regulating valve 17 is closed, and the flow passage can be communicated with the control valve 1, the regulating valve 17 and the overflow valve 18, and the structure is shown in fig. 1.
It should be noted that three mounting holes are formed in the valve housing 2, the control valve 1, the regulating valve 17 and the overflow valve 18 are respectively placed in the mounting holes, and meanwhile, a plurality of flow channels are formed in the valve housing 2, so that the control valve 1, the regulating valve 17 and the overflow valve 18 form a complete valve control assembly, which is equivalent to the switching structure of the packer assembly 26.
It should also be noted that during use, drilling fluid may pass through the control valve 1 and the regulating valve 17 in sequence, and this portion of the drilling fluid may act on the rubber 4, and that the particular rubber 4 may expand spontaneously upon encountering the drilling fluid, thereby pushing the wings 6 out so that the wings 6 abut the rock wall. For example, when the pressure of the drilling fluid is the opening pressure P1 of the control valve 1, the control valve 1 is opened, and the drilling fluid can flow into the rubber 4 through the normally open regulating valve 17 and then extend out of the wing plate 6; when the pressure of the drilling fluid is increased to the working pressure P2 of the regulating valve 17 (P2> P1), the regulating valve 17 is closed, and the wing plates 6 clamp the well wall; when the pressure of the drilling fluid is reduced and is less than P2, the regulating valve 17 is opened again, the drilling fluid flows back, and the wings 6 are retracted. Meanwhile, the other part of the drilling fluid can flow back to the inflow port of the drilling fluid after passing through the overflow valve 18, that is, the overflow valve 18 has the function of overflow pressure stabilization.
Preferably, the control valve 1, the regulating valve 17, the overflow valve 18 and the valve housing 2 are of an integrated structure, so as to realize high integration of the device and facilitate subsequent assembly operation of the device.
Preferably, the wing plate 6 is provided with a diamond coating to improve the hardness and wear resistance of the wing plate 6, and ensure that the wing plate 6 can effectively block the well wall, i.e., the shell 20 of the directional coring tool does not rotate, so that the directional coring tool can drill more smoothly under the conditions of normal linear drilling and directional coring drilling.
In addition to the above described rig valve control assembly, the present invention also provides a directional coring tool including the rig valve control assembly disclosed in the above embodiments, the directional coring tool comprising: the device comprises a hollow mandrel 19 and a shell 20 sleeved on the periphery of the hollow mandrel 19, wherein a fulcrum bearing assembly 21, a biasing assembly 22 and a cantilever bearing assembly 23 are sequentially arranged between the hollow mandrel 19 and the shell 20 from bottom to top; the lower end of the fulcrum bearing assembly 21 is connected with the drill bit 24, the upper end of the fulcrum bearing assembly 21 is hinged with the hollow mandrel 19, the lower end of the cantilever bearing assembly 23 is fixedly connected with the hollow mandrel 19, the upper end of the cantilever bearing assembly 23 is connected with the drill stem 25, the biasing assembly 22 is used for adjusting the eccentricity of the hollow mandrel 19, the outer periphery of the shell 20 is provided with an openable and closable packer assembly 26, the shell 20 can be clamped in the hole wall by the opened packer assembly 26, and the packer assembly 26 is the valve control drilling machine assembly of any one of the above items. The structure of other parts of the directional coring tool is referred to in the prior art and will not be described in detail herein.
It should be noted that the offset assembly 22 is used for adjusting the eccentricity of the hollow spindle 19, and may refer to that the offset assembly 22 is a three-layer sleeve structure, the innermost sleeve is connected with the hollow spindle 19 in an equal diameter manner, the outermost two sleeves are distributed in an inner and outer eccentric circle, and the position of the second sleeve can be adjusted to enable the innermost sleeve to eccentrically swing, so that the hollow spindle 19 bends and is displaced and changed in any direction, thereby adjusting the eccentricity of the hollow spindle 19. When the directional coring tool is performing a straight drilling operation, the hollow core shaft 19 is not bent, as shown in FIG. 4, whereas when the directional coring tool is required to perform a directional drilling operation, the biasing assembly 22 may be used to bend the hollow core shaft 19, as shown in FIG. 5.
It should also be noted that the fulcrum bearing assembly 21 is hinged to the hollow spindle 19 such that the fulcrum bearing assembly 21 allows for an angular tilt of the hollow spindle 19, i.e., the fulcrum bearing assembly 21 transfers the curvature of the hollow spindle 19 to the bur 24, thereby creating a lateral tilt of the bur 24. The cantilever bearing assembly 23 is fixedly connected to the hollow mandrel 19, so that the cantilever bearing assembly 23 does not transmit bending deformations of the hollow mandrel 19 to the drill rod 25, allowing the hollow mandrel 19 to be straightened at the cantilever bearing assembly 23. The packer assembly 26 may be opened to capture the bore wall to lock the housing 20 in the bore wall to prevent rotation of the housing 20, and the hollow mandrel 19 and bit 24 may be rotated to adjust the angle of inclination of the bit 24.
Additionally, it should be noted that during use of the directional coring tool, drilling fluid may flow from the interior of the drill pipe 25, through the hollow mandrel 19, through the fulcrum bearing assembly 21, out the drill bit 24, and back up the bottom of the hole, after which the drilling fluid may flow between the housing 20 of the directional coring tool and the wall of the hole, and the packer assembly 26 may expand under the pressure of the drilling fluid to seize the wall of the hole. The complete machine may then transfer torque to the drill rod 25, the drill rod 25 transferring torque to the hollow core shaft 19 and then to the drill bit 24 via the inner drive shaft of the fulcrum bearing assembly 21. Wherein, the cantilever bearing assembly 23, the offset assembly 22, the fulcrum bearing assembly 21 and the like are sequentially connected by screw threads to form an integral structure, and when the packer assembly 26 is clamped on the hole wall, the shell 20 can not rotate and only the hollow mandrel 19 can rotate, thereby realizing the rotary cutting function of the directional coring tool.
It should be noted that the first hole 13 and the second hole 14 and the third hole 15 are mentioned in the present application, wherein the first, the second and the third are only for distinguishing the position difference and are not in the order.
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. Any combination of all embodiments provided by the present invention is within the scope of the present invention, and will not be described herein.
The directional coring tool and its drill valve assembly provided by the present invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A drilling rig valve control assembly, comprising: the device comprises a control valve (1) for controlling whether drilling fluid flows or not according to the pressure of the drilling fluid, a valve shell (2) for installing the control valve (1), a packer shell (3) connected with the valve shell (2), rubber (4), a clamping plate (5) and a wing plate (6), wherein the rubber (4) can spontaneously expand when encountering the drilling fluid, the rubber (4) is of an annular structure and is positioned between the end part of the valve shell (2) and the end part of the packer shell (3), and the valve shell (2) and the packer shell (3) can form a shell (20) of a directional coring tool;
the clamping plate (5) and the wing plate (6) are symmetrically arranged between the outer peripheral part of the rubber (4) and the inner peripheral part of the packer shell (3), a flow passage for flowing the drilling fluid is arranged in the valve shell (2), when the pressure of the drilling fluid is greater than or equal to a preset pressure, the control valve (1) is opened, and when the pressure of the drilling fluid is less than the preset pressure, the control valve (1) is closed.
2. The drilling machine valve control assembly according to claim 1, wherein the control valve (1) comprises a valve block shell (7), a valve cover (8) for covering the valve block shell (7), a compression spring (9) and a valve core (10), one end of the valve core (10) is tightly attached to the valve port of the valve block shell (7), the other end of the valve core (10) is provided with the compression spring (9), and the other end of the compression spring (9) is tightly attached to the valve cover (8).
3. The drilling machine valve control assembly according to claim 2, wherein the valve core (10) is of a solid core structure, and the end part of the valve core (10) is provided with an outer conical surface (11) which is in matched abutment with an inner conical surface (12) of the valve port, and the valve port is communicated with the flow passage.
4. The drilling machine valve control assembly according to claim 3, wherein the valve block housing (7) is provided with a first hole (13), a second hole (14) and a third hole (15) in the axial direction in sequence to form a three-stage stepped hole, the first hole (13) is used for being in threaded connection with the valve cover (8), the second hole (14) is used for providing an installation space for the compression spring (9) and the valve core (10), and the third hole (15) is communicated with the flow passage.
5. The drilling rig valve control assembly according to claim 4, characterized in that an outer peripheral portion of the valve block housing (7) is provided with a side bore (16) communicating with the second bore (14).
6. The drilling machine valve control assembly according to any one of claims 1 to 5, characterized in that a regulating valve (17) connected in series with the control valve (1) and an overflow valve (18) connected in parallel with the control valve (1) are arranged in the valve housing (2), the control valve (1) and the overflow valve (18) both communicating with an inflow of the drilling fluid;
the regulating valve (17) is a normally open valve, when the pressure of the drilling fluid is greater than or equal to the working pressure of the regulating valve (17), the regulating valve (17) is closed, and the flow passage can communicate the control valve (1), the regulating valve (17) and the overflow valve (18).
7. The drilling machine valve control assembly according to claim 6, characterized in that the control valve (1), the regulating valve (17), the overflow valve (18) and the valve housing (2) are of one-piece construction.
8. Rig valve control assembly according to any of claims 1-5, characterized in that the wings (6) are provided with a diamond coating.
9. A directional coring tool, comprising: the device comprises a hollow mandrel (19) and a shell (20) sleeved on the periphery of the hollow mandrel (19), wherein a fulcrum bearing assembly (21), a biasing assembly (22) and a cantilever bearing assembly (23) are sequentially arranged between the hollow mandrel (19) and the shell (20) from bottom to top;
the lower end of the fulcrum bearing assembly (21) is connected with a drill bit (24), the upper end of the fulcrum bearing assembly (21) is hinged with the hollow mandrel (19), the lower end of the cantilever bearing assembly (23) is fixedly connected with the hollow mandrel (19), the upper end of the cantilever bearing assembly (23) is connected with a drill pipe (25), the biasing assembly (22) is used for adjusting the eccentricity of the hollow mandrel (19), the outer periphery of the casing (20) is provided with an openable and closable packer assembly (26), the casing (20) can be clamped in the hole wall by the opened packer assembly (26), and the packer assembly (26) is the drilling machine valve control assembly of any one of the claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210498744.5A CN114658378A (en) | 2022-05-09 | 2022-05-09 | Directional coring tool and drilling machine valve control assembly thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210498744.5A CN114658378A (en) | 2022-05-09 | 2022-05-09 | Directional coring tool and drilling machine valve control assembly thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114658378A true CN114658378A (en) | 2022-06-24 |
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| CN202210498744.5A Pending CN114658378A (en) | 2022-05-09 | 2022-05-09 | Directional coring tool and drilling machine valve control assembly thereof |
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| CN (1) | CN114658378A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105338A (en) * | 1985-08-29 | 1987-06-10 | 江汉石油管理局钻采设备研究所 | Underground blowout preventer |
| CN2172379Y (en) * | 1993-09-07 | 1994-07-20 | 白正裕 | Fluid cut-off self-close protector |
| US6516900B1 (en) * | 1998-12-09 | 2003-02-11 | Devico As | Apparatus for directional drilling |
| CN202109044U (en) * | 2011-06-21 | 2012-01-11 | 宁波方圆汽摩发展有限公司 | Fuel steam valve |
| CN103697174A (en) * | 2013-12-31 | 2014-04-02 | 浙江沁园水处理科技有限公司 | Mechanical filter element service life monitoring valve |
| CN105370940A (en) * | 2015-12-11 | 2016-03-02 | 四川嘉星燃气设备制造有限公司 | Safety blow-off valve |
| CN111255443A (en) * | 2020-02-20 | 2020-06-09 | 中国石油大学(华东) | Intelligent control system for underground gas invasion |
| CN112211580A (en) * | 2020-11-05 | 2021-01-12 | 中国铁建重工集团股份有限公司 | Directional core drill |
-
2022
- 2022-05-09 CN CN202210498744.5A patent/CN114658378A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105338A (en) * | 1985-08-29 | 1987-06-10 | 江汉石油管理局钻采设备研究所 | Underground blowout preventer |
| CN2172379Y (en) * | 1993-09-07 | 1994-07-20 | 白正裕 | Fluid cut-off self-close protector |
| US6516900B1 (en) * | 1998-12-09 | 2003-02-11 | Devico As | Apparatus for directional drilling |
| CN202109044U (en) * | 2011-06-21 | 2012-01-11 | 宁波方圆汽摩发展有限公司 | Fuel steam valve |
| CN103697174A (en) * | 2013-12-31 | 2014-04-02 | 浙江沁园水处理科技有限公司 | Mechanical filter element service life monitoring valve |
| CN105370940A (en) * | 2015-12-11 | 2016-03-02 | 四川嘉星燃气设备制造有限公司 | Safety blow-off valve |
| CN111255443A (en) * | 2020-02-20 | 2020-06-09 | 中国石油大学(华东) | Intelligent control system for underground gas invasion |
| CN112211580A (en) * | 2020-11-05 | 2021-01-12 | 中国铁建重工集团股份有限公司 | Directional core drill |
Non-Patent Citations (1)
| Title |
|---|
| 刘郡: "水平定向钻进取芯钻具关键技术研究", 科学技术创新, vol. 1, no. 5, pages 131 - 135 * |
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