CN219910691U - Rope core drilling tool - Google Patents

Abstract

The utility model provides a rope core drilling tool, which comprises an inner pipe assembly and an outer pipe assembly, wherein a channel for passing drilling fluid is formed between the inner pipe assembly and the outer pipe assembly, a flow channel for passing the drilling fluid is formed in the inner pipe assembly, a water inlet channel and a water outlet channel are formed on the side wall of the inner pipe assembly, a damping element and a valve core are arranged between the two ends of the flow channel, the damping element is used for clamping the valve core to block the flow channel when the drilling fluid pressure is smaller than the resistance of the damping element, and the damping element is used for allowing the valve core to pass through when the drilling fluid pressure is greater than the resistance of the damping element so as to enable the flow channel to be communicated; the side walls at two ends of the flow channel are respectively provided with an opening, the openings are used for enabling the valve core to enter and exit the flow channel, the openings are detachably connected with limiting elements, and the limiting elements are used for limiting the valve core in the flow channel. The utility model aims to provide a rope core drilling tool capable of resetting a valve core without disassembling the drilling tool.

Description

Rope core drilling tool

Technical Field

The utility model relates to the technical field of exploration drilling tools, in particular to a rope core drilling tool.

Background

Rope coring is a coring method in which the inner pipe and the core are lifted to the surface of the earth from the drill rod by means of ropes and special fishing tools without lifting the drill after the core is filled with the core. After the drilling tool drills a certain length of the core tube, stopping the pump and drilling, and then, using a thin steel wire rope to drop into a fisher from the ground to grasp a salvaging head of the inner tube assembly from the bottom of a hole, then, lifting up to disengage a bayonet lock, separating the inner tube from the outer tube, lifting the inner tube assembly from the drill rod to the ground, and taking out the core; after the core is taken out, the inner pipe assembly is thrown into the drill rod again, after the inner pipe assembly is in place (the clamping ring of the inner pipe assembly is contacted with the seat ring of the outer pipe assembly), the drilling tool is started, the inner pipe assembly is driven to grab the core through the rotation of the outer pipe assembly, and then the inner pipe assembly is lifted to the ground surface by the extracting tool to obtain the core.

In the rope coring drilling process flow, in order to avoid the phenomenon of single tube drilling and reduce core loss, the drilling tool needs to be started after the inner tube assembly is in place, so that an in-place signaling mechanism is usually arranged in the rope coring drilling tool.

Referring to fig. 4, in the prior art, a manner that a valve core 5 is matched with a damping bushing 6a is adopted in an in-place signaling mechanism, interference fit is adopted between the valve core 5 and the damping bushing 6a, drilling fluid enters a runner from a water inlet 211a, the damping bushing 6a clamps the valve core 5 to block the runner, so that the pressure value in the runner is increased, an operator can judge whether an inner pipe 2a is in place or not through a pressure gauge value, the signaling pressure value is regulated through the magnitude of interference between the damping bushing 6a and the valve core 5, when the drilling fluid pressure in the runner is greater than the resistance of the damping bushing 6a, the valve core 5 is discharged through the damping bushing 6a, the drilling fluid is discharged from a water outlet 221a, and the pumping pressure is recovered to be normal in the runner; after each drilling of the drilling tool is finished, the in-place signaling mechanism needs to disassemble the drilling tool to reset the valve core 5, so that the operation steps are complicated, the time is long, and the working efficiency is low; therefore, there is a need for a rope core drill that can reposition the valve core 5 without having to disassemble the drill.

Disclosure of Invention

The utility model mainly aims to provide a rope core drilling tool which can reset a valve core without disassembling the drilling tool.

In order to achieve the above object, the rope coring drilling tool provided by the utility model comprises an inner pipe assembly and an outer pipe assembly, wherein a channel for passing drilling fluid is formed between the inner pipe assembly and the outer pipe assembly, a flow channel for passing the drilling fluid is formed inside the inner pipe assembly, a water inlet channel for communicating the channel with the flow channel is formed on the side wall of the inner pipe assembly, a water outlet channel for communicating the channel with the flow channel is formed on the side wall of the inner pipe assembly, a damping element and a valve core for being matched with the damping element to block the flow channel are arranged between two ends of the flow channel, the damping element is used for clamping the valve core to block the flow channel when the drilling fluid pressure is smaller than the resistance of the damping element, and the damping element is used for allowing the valve core to pass through to enable the flow channel to be communicated when the drilling fluid pressure is larger than the resistance of the damping element; the side walls at two ends of the flow channel are respectively provided with an opening, the openings are used for enabling the valve core to enter and exit the flow channel, the openings are detachably connected with limiting elements, and the limiting elements are used for limiting the valve core in the flow channel.

Preferably, the limiting element is an elastic limiting ring, the elastic limiting ring can be taken down from the opening or clamped at the opening, and the valve core can be limited in the flow channel when the elastic limiting ring is clamped at the opening.

Preferably, one end of the outer tube assembly is used for connecting a drill bit, the inner tube assembly comprises a connecting section and a coring section which are sequentially connected, one end, deviating from the connecting section, of the coring section is used for facing the drill bit, one end, deviating from the coring section, of the connecting section is used for being clamped with a fishing tool, and one end, facing the drill bit, of the coring section is open and is provided with an accommodating space for clamping a coring core.

Preferably, the coring section comprises a connecting pipe and a core barrel, one end of the connecting pipe is detachably connected with the connecting section, the other end of the connecting pipe is connected with the core barrel, and a clamping structure for clamping the damping element is formed when the connecting pipe is connected with the connecting section.

Preferably, the water inlet channel penetrates through the side wall of the connecting pipe, and the water outlet channel penetrates through the side wall of the connecting section.

Preferably, the water inlet channel axis and the water outlet channel axis are respectively inclined with the inner tube assembly axis, the water inlet channel is used for communicating one end of the channel to be away from the drill bit, the water inlet channel is communicated with one end of the channel to be close to the drill bit, the water outlet channel is used for communicating one end of the channel to be close to the drill bit, and one end of the water outlet channel is communicated with one end of the channel to be away from the drill bit.

Preferably, the valve core is a spherical structural member; and/or the limiting element is a tension spring.

Preferably, the connecting section is in threaded connection with the connecting pipe; when the connecting section and the connecting pipe are screwed, the axis of the water inlet channel is coplanar with the axis of the water outlet channel.

Preferably, the damping element is formed with a clamping through hole for clamping the valve core, and the clamping through hole is used for allowing the valve core to pass through to enable the flow passage when the drilling fluid hydraulic pressure is larger than the resistance of the damping element.

Preferably, the outer wall of the inner tube assembly is provided with a clamping ring, the inner wall of the outer tube assembly is provided with a seat ring, and when the inner tube assembly is in place, the clamping ring can be clamped with the seat ring to form a blocking structure so as to block the channel.

According to the technical scheme, the valve core is placed into one end of the flow channel towards the water inlet channel through the opening close to the water inlet channel before the valve core is used, and the limiting element is arranged at the opening, so that the valve core can be limited in the flow channel; drilling fluid enters the flow channel from the water inlet channel, the valve core is blocked by the damping element to block the flow channel, hydraulic pressure in the flow channel rises, after the hydraulic pressure exceeds the resistance of the damping element, the valve core enters one end of the flow channel, facing the water outlet channel, of the flow channel through the damping element, and the flow channel is communicated; after the drilling tool is used, the limiting element is detached from the opening, the valve core can be taken out from the opening close to the water outlet channel, and then the valve core is put in from the opening close to the water inlet channel, so that the valve core can be reset.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the upper part of the drilling tool according to the present utility model;

FIG. 2 is a schematic view of the lower part of the drilling tool according to the present utility model;

FIG. 3 is a schematic view of a cut-away portion of the drilling tool of FIG. 1;

fig. 4 is a schematic structural diagram of a signaling mechanism of a drilling tool in the prior art.

Reference numerals illustrate:

1-an outer tube assembly; 2-an inner tube assembly; 2 a-an inner tube; 3-channel; 4-a limiting element; 5-valve core; 6-a damping element; 6a damping bushing; 7-opening; 8-a drill bit; 11-seat ring; 21-a connecting segment; 22-connecting pipes; 23-core tube; 24-snap ring; 211-water inlet channel; 211 a-water inlet holes; 221-water outlet channel; 221 a-a water outlet; 222-a clamping seat; 223-threads.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

The utility model provides a rope core drilling tool which can reset a valve core 5 without disassembling the drilling tool.

Referring to fig. 1 to 3, the rope coring drilling tool includes an inner pipe assembly 2 and an outer pipe assembly 1, a channel 3 for passing drilling fluid is formed between the inner pipe assembly 2 and the outer pipe assembly 1, a flow channel for passing drilling fluid is formed inside the inner pipe assembly 2, a water inlet channel 211 for communicating the channel 3 and the flow channel is formed on the side wall of the inner pipe assembly 2, a water outlet channel 221 for communicating the channel 3 and the flow channel is formed on the side wall of the inner pipe assembly 2, a damping element 6 and a valve core 5 for being matched with the damping element 6 to block the flow channel are arranged between two ends of the flow channel, the damping element 6 is used for clamping the valve core 5 to block the flow channel when drilling fluid pressure is smaller than resistance of the damping element 6, and the damping element 6 is used for passing the valve core 5 to enable the flow channel to be communicated when drilling fluid pressure is larger than resistance of the damping element 6; the side walls at two ends of the flow channel are respectively provided with an opening 7, the openings 7 are used for enabling the valve core 5 to enter and exit the flow channel, the openings 7 are detachably connected with the limiting element 4, and the limiting element 4 is used for limiting the valve core 5 in the flow channel. After the pressure in the flow passage exceeds the resistance of the damping element 6, the valve core 5 is pressed through the damping element 6 by pressure, the flow passage is communicated, and drilling fluid can enter the passage 3 through the flow passage, so that the drill bit 8 is cooled, and rock powder generated by drilling is washed away and taken away; in this embodiment, the limiting element 4 is an annular structural member or a rod-shaped structural member, and the shape of the limiting element 4 is not limited to this, and it is only necessary to limit the valve element 5 in the flow passage.

In the technical scheme of the utility model, the side wall of the inner pipe assembly 2 is provided with the opening 7 and the limiting element 4, before use, the valve core 5 is placed into one end of the flow channel towards the water inlet channel 211 through the opening 7 close to the water inlet channel 211, and then the limiting element 4 is arranged at the opening 7, so that the valve core 5 can be limited in the flow channel; drilling fluid enters the flow passage from the water inlet passage 211, the valve core 5 is blocked by the damping element 6 to block the flow passage, hydraulic pressure in the flow passage rises, after the hydraulic pressure exceeds the resistance of the damping element 6, the valve core 5 enters one end of the flow passage, which faces the water outlet passage 221, through the damping element 6, and the flow passage is communicated; after the drilling tool is used, the limiting element 4 is detached from the opening 7, the valve core 5 can be taken out from the opening 7 close to the water outlet channel 221, and then the valve core 5 can be put in from the opening 7 close to the water inlet channel 211, so that the valve core 5 can be reset.

Referring to fig. 3, preferably, the limiting element 4 is an elastic limiting ring, the elastic limiting ring can be removed from the opening 7 or clamped at the opening 7, and the valve core 5 can be limited in the flow channel when the elastic limiting ring is clamped at the opening 7. In this embodiment, the elastic limiting ring is used to be clamped at the opening 7 to reduce the caliber of the opening 7, so as to limit the valve core 5 in the flow channel.

Referring to fig. 1 and 3, preferably, one end of the outer tube assembly 1 is used for connecting the drill bit 8, the inner tube assembly 2 includes a connecting section 21 and a coring section which are sequentially connected, one end of the coring section, which is away from the connecting section 21, is used for facing the drill bit 8, one end of the connecting section 21, which is away from the coring section, is used for clamping a fishing tool, and one end of the coring section, which faces the drill bit 8, is open and is provided with a holding space for clamping a core. The drilling fluid can wash the damping element 6, the valve core 5 can also wear the damping element 6 when passing through the damping element 6, under the combined action of various factors, the original dimensional precision of the damping element 6 is changed to be invalid, the damping element 6 is easy to damage, and the damping element 6 can be replaced when damaged.

Referring to fig. 1, 2 and 3, preferably, the coring section includes a connection pipe 22 and a core barrel 23, one end of the connection pipe 22 is detachably connected with the connection section 21, the other end of the connection pipe 22 is connected with the core barrel 23, and a clamping structure for clamping the damping element 6 is formed when the connection pipe 22 is connected with the connection section 21. By arranging the clamping structure, the damping element 6 can be clamped and fixed when the connecting section 21 is screwed with the connecting pipe 22, so that the damping element 6 is prevented from loosening under the impact of drilling fluid; in this embodiment, a spearhead for clamping the fishing device is formed at one end of the connecting section 21 facing away from the drill bit 8, and a clamping structure for clamping the core is provided at one end of the core barrel 23 facing the drill bit 8.

Referring to fig. 1 and 3, the water inlet channel 211 preferably penetrates through a side wall of the connecting pipe 22, and the water outlet channel 221 preferably penetrates through a side wall of the connecting section 21. In the embodiment, a plurality of water inlets 211 and water outlets 221 are arranged, so that the flow of drilling fluid is more smooth; in a preferred embodiment, the number of the water inlet channels 211 and the number of the water outlet channels 221 are respectively 4, and are uniformly arranged around the axis of the inner pipe assembly 2; by providing a plurality of said water inlets 211 and a plurality of said water outlets 221, drilling fluid may be guided more smoothly through said channel 3.

Referring to fig. 3, preferably, the axis of the water inlet channel 211 and the axis of the water outlet channel 221 are respectively disposed obliquely to the axis of the inner tube assembly 2, the end of the water inlet channel 211, which is used for communicating with the channel 3, is far away from the drill bit 8, the end of the water inlet channel 211, which is used for communicating with the channel 3, is near to the drill bit 8, the end of the water outlet channel 221, which is used for communicating with the channel 3, is near to the drill bit 8, and the end of the water outlet channel 221, which is communicated with the channel, is far away from the drill bit 8. In this embodiment, the included angle between the axis of the water inlet channel 211 and the axis of the inner pipe assembly 2 is 45 °, and when the drilling fluid enters the flow channel from the channel 3, the resistance of the drilling fluid is small; the included angle between the axis of the water outlet channel 221 and the axis of the inner pipe assembly 2 is 45 degrees, when the drilling fluid enters the channel 3 from the flow channel, the resistance of the drilling fluid is small, and the flow of the drilling fluid is smoother; of course, the angle between the axis of the water inlet channel 211 and the axis of the inner tube assembly 2 and the angle between the axis of the water outlet channel 221 and the axis of the inner tube assembly 2 are not limited, and can be adjusted according to practical use requirements by those skilled in the art.

Referring to fig. 3, preferably, the valve core 5 is a spherical structural member; and/or the limiting element 4 is a tension spring. In this embodiment, the valve core 5 is a stainless steel ball.

Referring to fig. 1, 2 and 3, the connecting section 21 is preferably screwed with the connecting pipe 22 by threads 223; when the connecting section 21 and the connecting pipe 22 are screwed, the axis of the water inlet channel 211 is coplanar with the axis of the water outlet channel 221. When a plurality of water inlets 211 and a plurality of water outlets 221 are provided, the water inlets 211 and the water outlets 221 form a group in a one-to-one correspondence, and the axes of the water inlets 211 and the axes of the water outlets 221 in each group are coplanar.

Referring to fig. 1 and 3, preferably, the damping element 6 is formed with a clamping through hole for clamping the valve core 5, and the clamping through hole is used for allowing the valve core 5 to pass through to enable the flow passage to pass through when the drilling fluid pressure is greater than the resistance of the damping element 6. In this embodiment, the connecting pipe 22 is further provided with a clamping seat 222, the clamping seat 222 is used for clamping the valve core 5 after the valve core 5 passes through the damping element 6, by setting the clamping seat 222, the valve core 5 is clamped and fixed after the valve core 5 passes through the damping element 6, so that the valve core 5 is prevented from moving in the channel 3 under the impact of drilling fluid, the circulation of the drilling fluid is prevented from being influenced, and the clamping seat 222 is an annular structural member.

Referring to fig. 1 and 3, preferably, a snap ring 24 is disposed on an outer wall of the inner tube assembly 2, a seat ring 11 is disposed on an inner wall of the outer tube assembly 1, and when the inner tube assembly 2 is in place, the snap ring 24 can be clamped with the seat ring 11 to form a blocking structure so as to block the channel 3. After the inner pipe assembly 2 is in place, the clamping ring 24 is clamped with the seat ring 11 to form a blocking structure to block the channel 3, and drilling fluid enters the flow channel from the water inlet channel 211.

In this embodiment, the outer tube assembly 1 is further provided with a guide structure, the guide structure is disposed on an inner wall of the outer tube assembly 1, and the guide structure is used for abutting against an outer wall of the inner tube assembly 2 to limit the inner tube assembly 2 from interfering with the outer tube assembly 1.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather utilizing equivalent structural changes made in the present utility model description and drawings or directly/indirectly applied to other related technical fields are included in the scope of the present utility model.

Claims (10)

1. The rope coring drilling tool is characterized by comprising an inner pipe assembly and an outer pipe assembly, wherein a channel for passing drilling fluid is formed between the inner pipe assembly and the outer pipe assembly, a flow channel for passing the drilling fluid is formed inside the inner pipe assembly, a water inlet channel for communicating the channel with the flow channel is formed on the side wall of the inner pipe assembly, a water outlet channel for communicating the channel with the flow channel is formed on the side wall of the inner pipe assembly, a damping element and a valve core for being matched with the damping element to block the flow channel are arranged between two ends of the flow channel, the damping element is used for clamping the valve core to block the flow channel when drilling fluid pressure is smaller than damping element resistance, and the damping element is used for allowing the valve core to pass through to enable the flow channel to be communicated when drilling fluid pressure is larger than damping element resistance; the side walls at two ends of the flow channel are respectively provided with an opening, the openings are used for enabling the valve core to enter and exit the flow channel, the openings are detachably connected with limiting elements, and the limiting elements are used for limiting the valve core in the flow channel.

2. The rope coring drilling tool of claim 1, wherein the stop element is an elastic stop ring, the elastic stop ring can be removed from the opening or clamped at the opening, and the valve core can be limited in the flow passage when the elastic stop ring is clamped at the opening.

3. The rope coring drilling tool of claim 1, wherein one end of the outer tube assembly is used for connecting a drill bit, the inner tube assembly comprises a connecting section and a coring section which are sequentially connected, one end of the coring section, which is away from the connecting section, is used for being directed towards the drill bit, one end of the connecting section, which is away from the coring section, is used for being clamped with a fishing tool, and one end of the coring section, which is directed towards the drill bit, is open and is provided with a containing space for clamping a coring core.

4. A rope coring drilling tool according to claim 3, wherein said coring section comprises a connection pipe and a core barrel, one end of said connection pipe is detachably connected to said connection section, the other end of said connection pipe is connected to said core barrel, and a clamping structure for clamping said damping element is formed when said connection pipe is connected to said connection section.

5. The rope core drill of claim 4, wherein the water inlet channel extends through a sidewall of the connection tube and the water outlet channel extends through a sidewall of the connection section.

6. The rope coring drilling tool of claim 5, wherein said inlet channel axis and said outlet channel axis are disposed obliquely to said inner tube assembly axis, respectively, said inlet channel being adapted to communicate with an end of said passageway remote from said drill bit, said inlet channel being adapted to communicate with an end of said passageway proximate to said drill bit, said outlet channel being adapted to communicate with an end of said passageway remote from said drill bit.

7. The rope core drill of claim 5, wherein the spool is a spherical structure; and/or the limiting element is a tension spring.

8. The rope core drill of claim 5, wherein the connection section is threadably connected to the connection tube; when the connecting section and the connecting pipe are screwed, the axis of the water inlet channel is coplanar with the axis of the water outlet channel.

9. The string coring drilling tool of claim 1, wherein the damping element is formed with a snap-in through hole for snapping the valve core, the snap-in through hole being for passing the valve core to pass through the flow passage when the drilling fluid pressure is greater than the damping element resistance.

10. A rope coring drilling tool according to any one of claims 1-9, wherein a snap ring is provided on the outer wall of the inner tube assembly, a seat ring is provided on the inner wall of the outer tube assembly, and the snap ring is engageable with the seat ring to form a blocking structure to block the passage when the inner tube assembly is in place.