CN213235000U - Core drilling structure and core drill - Google Patents

Abstract

The utility model provides a get core and bore structure and get core drilling tool belongs to geological drilling technical field, and it bores the structure and includes to get the core: an outer cylinder; the inner core cylinder is arranged in the inner cavity of the outer cylinder, and a concave inner wall is formed on the inner core cylinder; the hoop component is arranged at the core inlet end of the inner core barrel and is arranged in the inner cavity of the outer barrel; and the drill bit is arranged at the core inlet end of the outer cylinder. The technical effects are as follows: the utility model provides an in the coring bores gets the structure, the inner core barrel shape becomes the inner wall that has sunken form, and the inner wall of sunken form can provide stress release, gypsum inflation's space for the core, reduces the stopper core phenomenon as far as possible, guarantees the integrality that single time core took effectively, utilizes the drill bit to bore and gets the core, after the core enters into the inner core barrel, lifts the urceolus, utilizes the clamp subassembly to cut off the core, accomplishes the work of getting of core.

Description

Core drilling structure and core drill

Technical Field

The utility model belongs to the technical field of the geology well drilling, more specifically say, relate to a core is got structure and is got core drill.

Background

During geological exploration drilling, rock sampling operations are typically required on the formation being drilled in order to understand the geological formation conditions. Usually, the rock salt exploration well needs to perform core taking work on a target layer top plate, and the Chuan-4 type core taking and drilling structure is the most ideal core taking and drilling structure for conventional core taking operation in the field and has the advantages of perfect matching and advanced technology. In order to improve the recovery amount of the next core, two sections of core extractors are connected in series for use, and after the core extractors are drilled to the bottom of a well, a pump is started to circularly clean the inner cylinder and the sediment at the bottom of the well; before core drilling, a valve ball is put into a drill column, and a pumping ball is started to be seated; when core drilling is carried out, the inner cylinder is suspended on the bearing and does not rotate; when the core is cut, the drilling tool, the hoop and the conical surface of the hoop seat are lifted to generate relative displacement to clamp and cut off the core, and then the core taking operation can be completed.

Because the ore minerals are mainly rock salt and then anhydrite, the rock salt often coexists with the gypsum and the anhydrite, the anhydrite is directly arranged at the top and the bottom of the ore layer, when the rock salt core enters the core taking inner cylinder, the gypsum and the anhydrite ore layer also enter the inner cylinder, along with the increase of the rock salt core entering the inner cylinder and the accumulation of the drilling time, the rock salt core in the inner cylinder absorbs water and expands to cause core plugging, the single-pass core drilling work is ended too early, and the integrity of the single-pass rock salt core cannot be effectively ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a get core and bore structure and core drill, the rock salt core leads to the technical problem of the integrality that can't guarantee single time rock salt core to take effectively because the stopper core phenomenon in aiming at solving traditional inner tube.

In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a core drilling structure comprising: an outer cylinder; the inner core cylinder is arranged in the inner cavity of the outer cylinder, and a concave inner wall is formed on the inner core cylinder; the hoop component is arranged at the core inlet end of the inner core barrel and is arranged in the inner cavity of the outer barrel; and the drill bit is arranged at the core inlet end of the outer cylinder.

Furthermore, a plurality of concave grooves are formed in the inner wall of the inner core barrel in the direction parallel to the axis, so that the inner core barrel is concave.

Further, a guide belt arranged in parallel to the axial direction is arranged between two adjacent concave grooves.

Further, the clip assembly includes: the hoop seat is arranged between the outer barrel and the inner barrel; and the clamping jaws are connected with the clamp seat, each clamping jaw is provided with a plurality of sharp spines arranged along the axis direction, when the clamping jaws are in a natural straightening state, the core inlet end of the inner core cylinder is in an open state, and when the clamping jaws are in a deformed closed state, the core inlet end of the inner core cylinder is in a closed state.

Further, when the claws are in a natural straightening state, the surfaces formed by the tips of the spikes are flush with the inner wall of the inner core barrel.

Further, each jaw also has a core cutting end arranged far away from the clamp seat, and the core cutting end has a taper.

Further, at least one sealing ring is arranged between the hoop component and the outer barrel.

Furthermore, the hoop component is connected with the inner core barrel through a trapezoidal screw thread.

Furthermore, the circumferential profile of the inner core barrel is provided with an intermediate matching body, and the intermediate matching body is connected with the hoop component through the trapezoidal screw threads.

The utility model provides a coring and drilling structure has following technological effect at least: compared with the prior art, the utility model provides an in coring and getting the structure, the inner core barrel shape becomes the inner wall that has sunken form, and the inner wall of sunken form can provide stress release, gypsum inflation space for the core, reduces the stopper core phenomenon as far as possible, guarantees the integrality that single time core took effectively, utilizes the drill bit to bore and gets the core, after the core enters into the inner core barrel, lifts the urceolus, utilizes the clamp subassembly to sever the core, accomplishes the work of getting of core.

The utility model also provides a core drill, include as above arbitrary embodiment core drill get the structure.

The utility model provides a core drill adopts as above arbitrary embodiment core drill bore and get the structure, the two technological effect is the same, no longer gives details here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic, partially cross-sectional view of a coring drilling configuration provided by an embodiment of the present invention with a collar assembly open;

FIG. 2 is a schematic cross-sectional view of the inner core barrel of FIG. 1;

FIG. 3 is a schematic, partially cross-sectional view of a coring drilling configuration provided by an embodiment of the present invention with the collar assembly closed;

FIG. 4 is a schematic view of the clamp assembly of the core drilling configuration of FIG. 3 when closed.

In the figure:

100. core drilling structure 110, outer barrel 112, mud channel

120. An inner core cylinder 122, a concave inner wall 124 and a concave groove

126. Guide band 130, clamp subassembly 132, clamp seat

134. Claw 136, spike 138, core cutting end

140. Drill 150, trapezoidal thread 160, middle adapter

170. Sealing ring

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Referring to fig. 1 to 4 together, a core drilling structure 100 and a core drill according to an embodiment of the present invention will now be described.

The embodiment of the utility model provides a core and bore structure 100, include: an outer tub 110; an inner core cylinder 120 disposed in the inner cavity of the outer cylinder 110, the inner core cylinder 120 having a concave inner wall 122 formed therein; a band assembly 130, which is arranged at the core inlet end of the inner core barrel 120 and is arranged in the inner cavity of the outer barrel 110; and a drill 140 provided at the core-entering end of the outer cylinder 110.

It should be noted that the embodiment of the utility model provides a get core and bore structure 100 is applied to and gets the core drill tool in, and the core drill tool still includes and bores with getting core and get the suspended structure etc. that structure 100 cooperations were used, and suspended structure is the same with prior art, belongs to double-barrelled single action type drilling tool, is applicable to most salt mine and gets core exploration engineering construction and use. For ease of description, the rock salt core is referred to herein simply as the core. Additionally, the core-entering end may be understood as the end where the core is drilled into the inner core barrel 120 by the drill bit 140.

In this embodiment, when the drill bit 140 drills, the outer barrel 110 rotates relative to the inner barrel 120, the core gradually enters the inner barrel 120, when the predetermined length is reached, the outer barrel 110 is lifted up, and under the reverse acting force of the core and the clip assembly 130, the clip assembly 130 deforms, closes the inner barrel 120 and cuts off the core, so that the core remains in the inner barrel 120, and the core is prevented from falling off.

Because the inner core barrel 120 forms the inner wall 122 of sunken form, this inner wall 122 of sunken form can provide stress release, the expanded space of gypsum for the core, has reduced the stopper core phenomenon as far as possible, can more smoothly drill the core of predetermineeing length, has reduced the fault rate, and the practicality is stronger, easily realizes, and the running cost is low.

It is understood that the concave inner wall 122 may be a regular or irregular shape with pits, concave points, etc. formed on the inner wall, which is not limited to the above.

The utility model provides a coring and drilling structure 100 has following technological effect at least: compared with the prior art, the utility model provides an in coring and getting structure 100, inner core section of thick bamboo 120 is formed with the inner wall 122 of sunken form, and the inner wall 122 of sunken form can provide stress release, the expanded space of gypsum for the rock core, reduces the stopper core phenomenon as far as possible, guarantees the integrality that single time rock core took effectively, utilizes drill bit 140 to bore the rock core, after the rock core enters inner core section of thick bamboo 120, lifts urceolus 110, utilizes clamp subassembly 130 to cut off the rock core, accomplishes the work of getting of drilling of rock core.

Referring to fig. 2, as an embodiment, the inner wall of the inner core cylinder 120 is provided with a plurality of concave grooves 124 in a direction parallel to the axis, so that the inner core cylinder 120 is concave. In this embodiment, in the direction parallel to the axis, the inner wall of the inner core barrel 120 is provided with a plurality of concave grooves 124, the plurality of concave grooves 124 are arranged around the inner wall in a circle, and the concave grooves 124 may completely cover the length direction of the inner core barrel 120 or partially cover the length direction of the inner core barrel 120. The concave groove 124 is arranged parallel to the axis, and can play a good role in guiding the core on the basis of providing a space for stress relief and gypsum expansion.

Further, between two adjacent concave grooves 124, there is a guide strip 126 disposed parallel to the axial direction. In this embodiment, the guide strip 126 may be understood as having a certain width, that is, a contact surface having a certain width is formed between the guide strip 126 and the core, so as to form a surface-to-surface contact, rather than a line-to-surface contact, which can not only guide the core into the inner core barrel 120, but also reduce scratching of the core.

In other words, the grooves 124 and the guide strips 126 form a straight rifling design, the grooves 124 correspond to concave lines, the guide strips 126 correspond to convex lines, the concave lines provide space for stress relief and gypsum expansion, and the core plugging phenomenon is reduced, and the convex lines guide the core into the deep part of the inner core barrel 120.

Without limitation to the specific structure of the clip assembly 130, referring to fig. 1, 3 and 4, as an embodiment, the clip assembly 130 includes: a clip seat 132 provided between the outer cylinder 110 and the inner cylinder 120; and a plurality of jaws 134, each of which is connected to the band seat 132, each jaw 134 having a plurality of spines 136 arranged along an axial direction, wherein when the jaws 134 are in a natural straightened state, the core inlet end of the inner core barrel 120 is in an open state, and when the jaws 134 are in a deformed closed state, the core inlet end of the inner core barrel 120 is in a closed state.

Specifically, the clamp seat 132 is arranged around a circle, the inner side of the clamp seat 132 is connected with the inner core barrel 120, the outer side of the clamp seat 132 is connected with the outer barrel 110, when the outer barrel 110 is lifted, the clamp seat 132 and the core are under the reverse acting force of pulling, the clamp seat 132 generates axial displacement relative to the outer barrel 110, due to the blocking of the drill 140, the clamp 134 deforms towards the axial direction under the condition of clinging to the inner wall of the outer barrel 110, and then gradually closes and cuts off the core, so that the core is kept in the inner core barrel 120. Each claw 134 is provided with a plurality of sharp spines 136 arranged along the axial direction, the cross sections of the sharp spines 136 are particularly in a sawtooth shape, and the sharp spines 136 can tightly clamp the rock core to avoid falling of the rock core. So set up, through the auto-lock of clamp seat 132, jack catch 134, can avoid the phenomenon that the core falls, takes off the core effectively.

Further, when the plurality of jaws 134 are in a naturally straightened state, the tips of the plurality of spikes 136 form a face that is flush with the inner wall of the inner core barrel 120. In this embodiment, when the plurality of claws 134 are in a natural straightening state, the claws 134 are arranged to cling to the inner wall of the outer cylinder 110, and when a core gradually enters the inner core cylinder 120, in order to prevent the spines 136 from blocking the entry of the inner core cylinder 120, the surfaces formed by the tips of the spines 136 are arranged to be flush with the inner wall of the inner core cylinder 120, so that the entry of the core is not hindered in the core drilling process.

Further, each jaw 134 also has a cored end 138 disposed away from the collet seat 132, the cored end 138 being tapered. In this embodiment, a gap is formed between the core cutting end 138 and the drill bit 140, and in the process of inward deformation of the core cutting end 138, due to the self taper, no spatial interference occurs between the core cutting end 138 and the drill bit 140, and due to the self taper, the core cutting end 138 can cut off the core more quickly, so that the core can be completely cut off, and the integrity of the core is ensured.

To prevent erosion of the slurry in contact with the core, referring to fig. 1 and 3, as an embodiment, at least one sealing ring 170 is provided between the collar assembly 130 and the outer barrel 110. Specifically, the clip assembly 130 includes a clip seat 132 with at least one seal ring 170 disposed between the clip seat 132 and the outer barrel 110. Generally, a slurry channel 112 is formed in the wall of the outer cylinder 110, and if slurry enters the inner cavity of the outer cylinder 110 from a connecting gap between the collar assembly 130 and the outer cylinder 110, the slurry is easily corroded by being in contact with a rock core for a long time, so that the surface quality of the rock core is poor, and the integrity of the rock core is affected. In this embodiment, a double sealing ring 170 is disposed between the clamp seat 132 and the outer cylinder 110, and the sealing ring 170 is generally made of rubber, so as to effectively isolate the clamp seat 132 from the slurry channel 112 and prevent erosion of the core and slurry. It will be appreciated that a greater number of seals 170 may be used to enhance the isolation effect.

In order to prevent the clip assembly 130 from being separated from the core barrel 120, referring to fig. 1 and 3, as an embodiment, the clip assembly 130 is connected to the core barrel 120 by a trapezoidal thread 150. Specifically, the clip assembly 130 includes a clip seat 132, and the clip seat 132 is connected to the core barrel 120 by a trapezoidal thread 150. The trapezoidal thread 150 is a trapezoidal thread, and an internal thread is formed on the clip seat 132 and an external thread is formed on the inner core barrel 120, so that the clip seat 132 is connected to the inner core barrel 120. So set up, difficult not hard up between clamp seat 132 and the inner core section of thick bamboo 120, mechanical strength is high, can improve the joint strength between the two effectively, is difficult for taking place the thread slipping, the dropout because of cutting the core resistance big, avoids coring operation's failure.

Further, the inner core barrel 120 is provided with an intermediate coupling body 160 along the circumferential contour thereof, and the intermediate coupling body 160 is connected to the clip assembly 130 through the trapezoidal thread 150. In this embodiment, the intermediate coupling body 160 is disposed around the inner core barrel 120. Generally, the yoke assembly 130 can be disassembled for use and replaced periodically, however, the core barrel 120 is complicated to disassemble and high in maintenance cost, and in order to reduce the mechanical damage to the core barrel 120 caused by frequent replacement of the yoke assembly 130, an intermediate coupling body 160 is further provided between the core barrel 120 and the yoke assembly 130, thereby reducing the maintenance frequency and maintenance cost of the core barrel 120.

The embodiment of the present invention further provides a core drill, including the core drilling structure 100 according to any of the above embodiments.

It should be noted that the core drill further includes a suspension structure and the like used in cooperation with the core drilling structure 100, and the suspension structure is the same as the prior art and belongs to a double-tube single-action type drill.

On the basis of the embodiment, the embodiment of the utility model provides a core drill has advantages such as stable performance, simple structure, easy clean maintenance, long service life, can the wide application in the core technology is got to the rock salt exploration well.

The embodiment of the utility model provides a core drill has following technological effect at least: compared with the prior art, the embodiment of the utility model provides a core drill adopts as above embodiment core drill get structure 100, inner core section of thick bamboo 120 is formed with the inner wall 122 of sunken form, the inner wall 122 of sunken form can provide stress release, the expanded space of gypsum for the core, reduce the stopper core phenomenon as far as possible, guarantee the integrality that single time core took effectively, utilize drill bit 140 to bore and get the core, after the core enters into inner core section of thick bamboo 120, lift outer cylinder 110, utilize clamp subassembly 130 to cut off the core, accomplish the work of getting of core.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Coring bores gets structure, its characterized in that includes:

an outer cylinder;

the inner core cylinder is arranged in the inner cavity of the outer cylinder, and a concave inner wall is formed on the inner core cylinder;

the hoop component is arranged at the core inlet end of the inner core barrel and is arranged in the inner cavity of the outer barrel; and

the drill bit is arranged at the core inlet end of the outer cylinder.

2. The core drilling structure as recited in claim 1, wherein said inner core barrel has a plurality of concave grooves formed in an inner wall thereof in a direction parallel to an axis thereof to make said inner core barrel concave.

3. The core-drilling structure as recited in claim 2, wherein a guide strip is provided between adjacent two of said concave grooves in a direction parallel to the axis.

4. The core drilling structure as recited in claim 1, wherein said clip assembly comprises:

the hoop seat is arranged between the outer barrel and the inner barrel; and

the clamping jaws are connected with the clamp seat, each clamping jaw is provided with a plurality of sharp spines arranged along the axis direction, when the clamping jaws are in a natural straightening state, the core inlet end of the inner core cylinder is in an open state, and when the clamping jaws are in a deformed closed state, the core inlet end of the inner core cylinder is in a closed state.

5. The core-coring drilling configuration of claim 4, wherein the plurality of prongs have tips that form a surface flush with the inner wall of the inner core-barrel when the plurality of jaws are in a naturally straightened state.

6. The core drilling structure as recited in claim 4 wherein each said jaw further has a cored end disposed distally from said collet seat, said cored end having a taper.

7. The core drilling structure as recited in any one of claims 1, 4, 5 and 6, wherein at least one sealing ring is provided between said collar assembly and said outer barrel.

8. The core drilling structure as recited in any one of claims 1, 4, 5 and 6, wherein said band assembly is connected to said inner core barrel by a trapezoidal thread.

9. The core drilling structure as recited in claim 8, wherein said inner core barrel is circumferentially contoured with an intermediate adapter, said intermediate adapter being connected to said collar assembly by said trapezoidal thread.

10. Core drill bit, characterized in that it comprises a core drilling structure according to any one of claims 1 to 9.

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