CN110118070B - Double-deck inner tube shape-preserving coring tool - Google Patents
Double-deck inner tube shape-preserving coring tool Download PDFInfo
- Publication number
- CN110118070B CN110118070B CN201910543668.3A CN201910543668A CN110118070B CN 110118070 B CN110118070 B CN 110118070B CN 201910543668 A CN201910543668 A CN 201910543668A CN 110118070 B CN110118070 B CN 110118070B
- Authority
- CN
- China
- Prior art keywords
- bearing
- ring
- assembly
- core
- bearing piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 239000011435 rock Substances 0.000 claims abstract description 30
- 239000000725 suspension Substances 0.000 claims abstract description 22
- 239000002893 slag Substances 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 210000000078 claw Anatomy 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 15
- 239000003381 stabilizer Substances 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 239000002355 dual-layer Substances 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 or core extractors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 or core extractors
- E21B25/10—Formed core retaining or severing means
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a double-layer inner barrel shape-preserving coring tool, and belongs to the technical field of drilling coring. The invention comprises an outer cylinder and the like; the second rotating assembly comprises a second semi-ring, a second bearing piece, a second bearing box and a hanging assembly, the second semi-ring and the second bearing piece are sleeved on the outer side wall of the hanging assembly, the second semi-ring is abutted to the upper portion of the second bearing piece, and the second bearing box is coated on the outer side of the second bearing piece and the upper portion of the second bearing piece is connected with the mandrel. The lower part of the suspension assembly is detachably connected with at least two arc-shaped inner cylinders through fixing pieces, and the arc-shaped inner cylinders are positioned on the same circumference; a gap is formed between two adjacent arc inner cylinders for discharging the slag and the rock scraps. The invention has the beneficial effects that the rock cores can be collected in a classified manner by arranging the double-bearing double-inner-cylinder structure form, so that the working efficiency is improved; the multi-stage rotation stopping mechanism has the advantages that the problems of core grinding, mechanical collision and the like can be better avoided, the core taking is convenient and quick, the drilling core rate is obviously improved, and the core integrity is excellent.
Description
Technical Field
The invention belongs to the technical field of drilling coring, and particularly relates to a double-layer inner barrel shape-preserving coring tool.
Background
The rock core is a rock sample which is taken out of the well by equipment such as a coring tool and is used for research, analysis and assay of researchers. The core is mainly used for researching stratum, hydrocarbon reservoir and oil producing layer, so that drilling and coring are important ways for providing underground original resources, and are also direct means for acquiring stratum lithology, oil containing conditions and other data.
However, in the current oilfield development, there are a number of problems with the protection and acquisition of the core: 1. when the drilling tool rotates, the outer cylinder drives the coring bit to rotate, the inner cylinder realizes the purpose of non-rotation through the suspension device and the rotating assembly, but when in downhole operation, the problem of clamping of the rotating assembly can occur, or when the viscosity of drilling fluid is overlarge, mud cakes on the inner wall of the outer cylinder are too thick, the mud cakes gradually adhere the inner cylinder and the outer cylinder together, and the two conditions can lead a rock core stored in the inner cylinder to generate mechanical collision with the inner cylinder wall, so that the rock core is damaged; 2. in the existing drilling process, no matter the rope is used for coring or the inner cylinder and the outer cylinder are used for simultaneously taking out the core, the inner cylinder is required to be lifted to the ground, the core claw assembly is dismounted, the core is poured out of the inner cylinder, more rock scraps and crushed slag can remain in the inner cylinder when a broken stratum is drilled, the problems of core blockage and core grinding occur, the core can be taken out only by beating the oscillating inner cylinder, the core can be broken by impact, the core is broken into sections or broken, even more serious conditions can occur, the core blocked in the inner cylinder still is difficult to fall through beating the inner cylinder, the intact core is difficult to obtain, and the working efficiency is lower.
Disclosure of Invention
(one) technical purpose
Aiming at the defects of the prior art, the invention provides a double-layer inner barrel conformal coring tool, which aims to solve the problem that a perfect core is difficult to obtain in the drilling process and improve the working efficiency.
(II) technical scheme
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a double-deck inner tube shape-preserving coring tool, includes safety joint, urceolus, first rotatory assembly, inner tube, rock core claw subassembly and coring bit, and outer tube and first rotatory assembly are connected respectively to the safety joint, and the inner tube suit is in the urceolus and inner tube upper portion is connected with first rotatory assembly, leaves the clearance that is used for the drilling fluid circulation between urceolus and the inner tube, and rock core claw subassembly is connected to the inner tube bottom, and the coring bit is connected to the urceolus bottom. In the drilling process, the temperature must be reduced, the impurities at the bottom of the well must be taken away by the circulation of the drilling fluid, the functions of consolidating the well wall and the like are realized, the drilling fluid enters through the gap between the inner cylinder and the outer cylinder and returns to the ground through the gap between the outer cylinder and the outer sleeve; when the underground footage reaches the expected range, the rock core is cut off by the lifting drilling tool and the rock core claw assembly, and the rock core claw opening is provided with a wedge block structure, so that the cut rock core column can be supported in the process of taking off the drill.
The first rotating assembly comprises a first semi-ring, a first bearing piece, a first bearing box and a mandrel, wherein the first semi-ring and the first bearing piece are sleeved on the outer side wall of the mandrel, the first semi-ring is abutted to the upper part of the first bearing piece, the first bearing box is coated on the outer side of the first bearing piece, and the upper part of the first bearing box is connected with the safety joint; the mandrel is provided with a flow hole which is communicated with a gap between the outer cylinder and the inner cylinder and used for circulating drilling fluid; the lower part of the mandrel is connected with the inner cylinder. The first bearing piece is surrounded by first semi-ring, first bearing box and mandrel, play the spacing effect of stability to first bearing piece, first bearing box can produce circumferential direction rotation around first bearing piece, its specific functional effect is, drive the urceolus and act the coring bit when the safety joint is rotatory, thereby realize the footage in the pit, and safety joint drives first bearing box circumferential direction on first bearing piece, again because the effect of first bearing piece, avoid the mandrel along with rotating, then the mandrel can not drive the inner tube rotation of downside, thereby can not appear grinding the heart, take place the problem of mechanical collision with the rock core.
The upper part of the mandrel is opened, the inside of the mandrel is hollow, drilling fluid flows into the mandrel from the upper drilling tool, and then flows into a gap between the inner cylinder and the outer cylinder through the circulating holes.
The double-layer inner barrel conformal coring tool further comprises a second rotary assembly, the second rotary assembly comprises a second semi-ring, a second bearing part, a second bearing box and a hanging assembly, the second semi-ring and the second bearing part are sleeved on the outer side wall of the hanging assembly, the second semi-ring is abutted to the upper portion of the second bearing part, and the second bearing box is coated on the outer side of the second bearing part and the upper portion of the second bearing part is connected with the mandrel. The second bearing piece is surrounded by the second semi-ring, the second bearing box and the suspension component, plays a role in stabilizing and limiting the second bearing piece, the second bearing box can rotate circumferentially around the second bearing piece, and the second rotating assembly has the effect that when the rotation stopping function of the first rotating assembly is weakened or even fails, the mandrel can drive the inner cylinder to rotate at the moment, but the mandrel can be prevented from being linked with the second bearing box to rotate so as to drive the suspension component, the suspension component can not drive the arc-shaped inner cylinder at the lower side of the suspension component to rotate, and the problems of grinding and mechanical collision with the core can be continuously avoided.
The lower part of the suspension assembly is detachably connected with at least two arc-shaped inner cylinders through fixing pieces, and the arc-shaped inner cylinders are positioned on the same circumference; and a gap is formed between two adjacent arc inner cylinders and is used for discharging core slag and rock scraps. During coring, the hanging assembly can be detached, the fixing piece is taken down, the arc can be detached from the hanging assembly, then the whole core column can be directly taken out, the inner cylinder pipe wall does not need to be knocked, the intact core can be obtained, and the coring operation is convenient and simple.
Further, a first thread protecting sleeve is arranged at the top of the safety joint and used for protecting the top side threads of the safety joint.
Further, the safety joint bottom is equipped with adjustment portion, first bearing box is connected and its hookup location can be adjusted at adjustment portion with adjusting the distance of core claw subassembly and coring bit. Specifically, the connection position of the first bearing box and the adjusting part is adjusted downwards, so that the distance between the core claw assembly and the coring bit can be shortened, and the device is suitable for soft stratum; the connecting position of the first bearing box and the adjusting part is adjusted upwards, so that the distance between the core claw assembly and the coring bit can be increased, and the device is suitable for harder strata. In summary, the invention can adapt to lithology conditions of different strata.
Furthermore, the adjusting part is sequentially sleeved with a pressing cap, a braking ring and an adjusting nut from top to bottom, the braking ring is clamped between the pressing cap and the adjusting nut, and the lower part of the adjusting nut is connected with the first bearing box. The pressing cap, the braking ring, the adjusting nut and the mandrel play a role in braking each other, and the adjusting nut and the mandrel can be prevented from rotating relatively.
Further, a back pressure valve seat is arranged at the top of the suspension assembly and used for placing a sealing ball to seal the inner cavity of the inner cylinder. The upper part of the suspension assembly is open, the inside of the suspension assembly is hollow, and before drilling and coring are started in actual operation, sealing well fluid can enter the inner cylinder through a back pressure valve seat of the suspension assembly without being thrown into the well, so that the bottom of the well is flushed, and the inner cavity of the inner cylinder can be cleaned; when core drilling is needed, a sealing ball is put into, the sealing ball falls on the back-pressure valve seat, the top end of the suspension assembly is sealed, the inner cavity of the inner cylinder is sealed, and at the moment, drilling fluid only enters into a gap between the inner cylinder and the outer cylinder from the circulation hole of the mandrel and does not enter into the inner cylinder.
Further, a second thread protecting sleeve is arranged at the bottom of the outer cylinder and used for protecting threads on the bottom side of the outer cylinder.
Further, an upper stabilizer is arranged between the safety joint and the outer cylinder; the lower part of the outer cylinder is connected with a lower stabilizer, and the lower part of the lower stabilizer is connected with the second thread protecting sleeve. The upper stabilizer and the lower stabilizer can keep the outer barrel and the core bit stable in operation, and are beneficial to preventing well deviation.
Further, the fixing piece is a pin.
Further, the number of the arc-shaped inner cylinders is two. Of course, the arcuate inner barrel can be of other numbers.
(III) beneficial effects
Compared with the prior art, the invention has the beneficial effects that: by arranging the double-bearing double-inner-cylinder structure, the cores can be collected in a classified manner, and the working efficiency is improved; the multi-stage rotation stopping mechanism has the advantages that the problems of core grinding, mechanical collision and the like can be better avoided, the core taking is convenient and quick, the drilling core rate is obviously improved, and the core integrity is excellent.
Drawings
FIG. 1 is a schematic diagram of a front view of the present invention;
FIG. 2 is a schematic diagram of the front view of the upper section of the present invention;
FIG. 3 is a schematic view of the front view of the lower section of the present invention;
FIG. 4 is an enlarged view of a portion of the present invention with respect to FIG. 2A;
FIG. 5 is an enlarged view of a portion of the present invention with respect to FIG. 2B;
FIG. 6 is a cross-sectional view of an arcuate inner barrel of embodiment 1 of the present invention;
reference numerals illustrate: 1-a safety joint; 11-a first thread protector; 12-an adjusting part; 21-upper stabilizer; 22-lower stabilizer; 31-pressing the cap; a 32-brake ring; 33-adjusting the nut; 41-a first half ring; 42-a first bearing member; 43-a first bearing cartridge; 44-spindle; 441-flow holes; 51-a second half ring; 52-a second bearing member; 53-a second bearing cartridge; 54-a suspension assembly; 541-back-pressing the valve seat; 6-an outer cylinder; 61-a second thread protector; 7-an inner cylinder; 8-an arc inner cylinder; 81-fixing pieces; 82-notch; 9-core jaw assembly.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-6, the present invention provides a preferred embodiment of a dual inner barrel conformal coring tool.
Referring to fig. 1-5, a dual-layer inner barrel shape-preserving coring tool comprises a safety joint 1, an outer barrel 6, a first rotary assembly, an inner barrel 7, a core claw assembly 9 and a coring bit, wherein the safety joint 1 is respectively connected with the outer barrel 6 and the first rotary assembly, the inner barrel 7 is sleeved in the outer barrel 6, the upper part of the inner barrel 7 is connected with the first rotary assembly, a gap for circulation of drilling fluid is reserved between the outer barrel 6 and the inner barrel 7, the bottom of the inner barrel 7 is connected with the core claw assembly 9, and the bottom of the outer barrel 6 is connected with the coring bit. The top of the safety joint 1 is provided with a first thread protecting sleeve 11 for protecting the top side thread of the safety joint 1.
The first rotating assembly comprises a first semi-ring 41, a first bearing piece 42, a first bearing box 43 and a mandrel 44, wherein the first semi-ring 41 and the first bearing piece 42 are sleeved on the outer side wall of the upper part of the mandrel 44, the first semi-ring 41 is abutted to the upper part of the first bearing piece 42, the first bearing box 43 is coated on the outer side of the first bearing piece 42, and the upper part of the first bearing box is connected with the safety joint 1; the mandrel 44 is provided with a flow hole 441, and the flow hole 441 is communicated with a gap between the outer cylinder 6 and the inner cylinder 7 and is used for flowing drilling fluid; the lower part of the mandrel 44 is connected with the inner cylinder 7. The bottom of the safety joint 1 is provided with an adjusting part 12, the first bearing box 43 is connected with the adjusting part 12, and the connection position of the first bearing box can be adjusted by the adjusting part 12 so as to adjust the distance between the core claw assembly 9 and the coring bit. The adjusting part 12 is sequentially sleeved with a pressing cap 31, a braking ring 32 and an adjusting nut 33 from top to bottom, the braking ring 32 is clamped between the pressing cap 31 and the adjusting nut 33, and the lower part of the adjusting nut 33 is connected with the first bearing box 43.
The double-layer inner barrel conformal coring tool further comprises a second rotating assembly, the second rotating assembly comprises a second semi-ring 51, a second bearing piece 52, a second bearing box 53 and a hanging component 54, the second semi-ring 51 and the second bearing piece 52 are sleeved on the outer side wall of the upper portion of the hanging component 54, the second semi-ring 51 is abutted to the upper portion of the second bearing piece 52, and the second bearing box 53 is coated on the outer side of the second bearing piece 52 and the upper portion of the second bearing piece is connected with the mandrel 44.
The lower part of the suspension assembly 54 is detachably connected with two arc-shaped inner cylinders 8 through pins, and the arc-shaped inner cylinders 8 are positioned on the same circumference; a gap 82 is formed between the two arc-shaped inner cylinders 8 and is used for discharging core slag and rock scraps. The top of the suspension assembly 54 is provided with a back pressure valve seat 541 for placing a sealing ball to seal the inner cavity of the inner cylinder 7.
An upper stabilizer 21 is arranged between the safety joint 1 and the outer barrel 7; the lower part of the outer cylinder 7 is connected with a lower stabilizer 22, and the lower part of the lower stabilizer 22 is connected with the second thread protecting sleeve 61 for protecting the bottom side threads of the lower stabilizer 22.
Referring to fig. 6, in this embodiment, it should be noted that, the vertical distance between the notches 8 is t, and by adjusting the size of t, core fragments and rock scraps with different sizes can be adapted; when a broken stratum is drilled, t is required to be increased, because core slag and rock scraps are more at the moment, the core is easy to be blocked in the inner cylinder 7, and the increased notch 8 can enable more core slag and rock scraps to enter the inner cylinder 7, so that excessive abrasion of the core by the core slag and rock scraps is avoided, and the integrity of the core is damaged; when the hard stratum is drilled, t can be reduced, the inner wall area of the arc-shaped inner barrel 8 is larger, and the support stability of the rock core column is improved.
Referring to fig. 1 to 6, when the present solution is used, the drilling tool is assembled and lowered into the well, at this time, no sealing ball is thrown into the drilling tool, the back pressure valve seat 541 is a passage, the mandrel 44 is communicated with the inner cylinder 7, and the through hole 441 is communicated with the gap between the mandrel 44 and the inner cylinder 7, the outer cylinder 6; the drilling fluid is pumped into the well to form circulation, mud cakes are formed underground to protect the well wall and wash the well bottom, and a part of the drilling fluid enters the arc-shaped inner barrel 8 connected with the back suspension assembly 54 through the back pressure valve seat 541, and because the notch 82 is arranged between the two arc-shaped inner barrels 8, the drilling fluid can be directly washed onto the inner wall of the inner barrel 7, the cavity walls of the inner barrel 7 and the arc-shaped inner barrels 8 are all washed, impurity adhesion residues are avoided, and abrasion damage to a rock core is avoided.
Before drilling begins, a sealing ball is put into the well, falls in the drilling tool and finally falls on the back pressure valve seat 541, and the suspension assembly 54 is blocked, and the communication relationship between the mandrel 44 and the inner cylinder 7 is blocked. When the core is drawn into the gauge, the safety joint 1 drives the outer cylinder 6 to rotate, the outer cylinder 6 is linked with the core-drawing drill to draw the gauge, and the first bearing box 43 and the first bearing piece 42 are in rolling connection under the action of the first rotating assembly, so that the first bearing box 43 rotating along with the safety joint 1 does not drive the mandrel 44 to rotate, and the inner cylinder 7 can be ensured not to rotate; it should be noted that, the first-stage rotation stopping mechanism provided by the scheme can provide a stable storage space for the core column in the inner barrel 7, and plays a role in protecting the core.
The second rotating assembly is used as a second-stage rotation stopping mechanism, and only plays a role in installing and connecting the arc-shaped inner cylinder 8 when the first rotating assembly works normally. The inner diameter of the rock core claw assembly 9 is adapted to the circumference formed by the two arc-shaped inner cylinders 8, so that the rock core column can smoothly enter the two arc-shaped inner cylinders 8. Referring to fig. 6, when the core column enters the arc core inner barrel 8, the outer surface of the complete core can carry rock scraps, the broken core generally returns to the city to be broken, and the rock scraps and the broken slag enter the space between the arc inner barrel 8 and the inner barrel 7 through the notch 82, so that the problems of grinding the core, mechanical collision and the like are avoided. Further improvement, according to the existing geological data or pre-drilling, the lithology of the bottom layer is obtained, the proper model of the arc-shaped inner cylinder 8 can be selected, namely, the vertical interval t between the arc-shaped inner cylinders 8 is adjusted, t is increased to adapt to broken stratum, and t is reduced to adapt to hard and complete stratum.
It should be specifically noted that, when the rotation stopping function of the first rotating assembly is weakened or even fails, the mandrel 44 drives the inner cylinder 7 to rotate, which may damage the core column, and at this time, the second rotating assembly performs the rotation stopping function, specifically, the second bearing box 53 is in rolling connection with the second bearing member 52, although the mandrel 44 drives the inner cylinder 7 to rotate but does not drive the suspension assembly 54, the arc-shaped inner cylinder 8 connected with the suspension assembly 54 also does not rotate, and still provides a stable storage space for the core column.
When coring reaches a preset value, the inner barrel 7 and the arc-shaped inner barrel 8 are detached from the drilling tool, and rock scraps and core scraps collected in the inner barrel 7 are collected in the arc-shaped inner barrel 8, so that the core sorting and collecting device has a function of sorting and collecting the core, and improves the working efficiency. In this embodiment, the process of disassembling the arc inner cylinder 8 is to take down the pin of one of the arc inner cylinders 8 on the suspension assembly 54, and then remove the arc inner cylinder 8, so that the complete core column is exposed, and the core column can be taken out smoothly and conveniently. Of course, the fixing member 81 may be a detachable member which plays a role of fixing other than the pin.
Claims (7)
1. The utility model provides a double-deck inner tube shape-preserving coring tool, including safe joint (1), urceolus (6), first rotatory assembly, inner tube (7), rock core claw subassembly (9) and coring bit, urceolus (6) and first rotatory assembly are connected respectively to safe joint (1), inner tube (7) suit is in urceolus (6) and inner tube (7) upper portion is connected with first rotatory assembly, leave the clearance that is used for the drilling fluid circulation between urceolus (6) and inner tube (7), rock core claw subassembly (9) are connected to inner tube (7) bottom, coring bit is connected to urceolus (6) bottom; the method is characterized in that:
the first rotating assembly comprises a first semi-ring (41), a first bearing piece (42), a first bearing box (43) and a mandrel (44), wherein the first semi-ring (41) and the first bearing piece (42) are sleeved on the outer side wall of the mandrel (44), the first semi-ring (41) is abutted to the upper part of the first bearing piece (42), the first bearing box (43) is coated on the outer side of the first bearing piece (42), and the upper part of the first bearing box is connected with the safety joint (1); the mandrel (44) is provided with a flow hole (441), and the flow hole (441) is communicated with a gap between the outer cylinder (6) and the inner cylinder (7) and is used for flowing drilling fluid; the lower part of the mandrel (44) is connected with the inner cylinder (7);
the double-layer inner barrel conformal coring tool further comprises a second rotating assembly, the second rotating assembly comprises a second semi-ring (51), a second bearing piece (52), a second bearing box (53) and a hanging assembly (54), the second semi-ring (51) and the second bearing piece (52) are sleeved on the outer side wall of the hanging assembly (54), the second semi-ring (51) is abutted to the upper part of the second bearing piece (52), and the second bearing box (53) is coated on the outer side of the second bearing piece (52) and the upper part of the second bearing box is connected with the mandrel (44);
the lower part of the suspension assembly (54) is detachably connected with an arc-shaped inner cylinder (8) through a fixing piece (81), the number of the arc-shaped inner cylinders (8) is at least two, and the arc-shaped inner cylinders (8) are positioned on the same circumference; a gap (82) is formed between two adjacent arc inner cylinders (8) for discharging core slag and rock scraps;
the top of the safety joint (1) is provided with a first thread protection sleeve (11) for protecting the top side thread of the safety joint (1);
the bottom of the safety joint (1) is provided with an adjusting part (12), the first bearing box (43) is connected with the adjusting part (12) and the connecting position of the first bearing box can be adjusted by the adjusting part (12) so as to adjust the distance between the core claw assembly (9) and the coring bit.
2. The dual-layer inner barrel conformal coring tool of claim 1, wherein: the adjusting part (12) is sequentially sleeved with a pressing cap (31), a braking ring (32) and an adjusting nut (33) from top to bottom, the braking ring (32) is clamped between the pressing cap (31) and the adjusting nut (33), and the lower part of the adjusting nut (33) is connected with the first bearing box (43).
3. The dual-layer inner barrel conformal coring tool of claim 1, wherein: the top of the suspension assembly (54) is provided with a back pressure valve seat (541) for placing a sealing ball to seal the inner cavity of the inner cylinder (7).
4. The dual-layer inner barrel conformal coring tool of claim 1, wherein: the bottom of the outer barrel (6) is provided with a second thread protecting sleeve (61) for protecting the threads on the bottom side of the outer barrel (6).
5. The dual layer inner barrel conformal coring tool of claim 4, wherein: an upper stabilizer (21) is arranged between the safety joint (1) and the outer cylinder (6); the lower part of the outer cylinder (6) is connected with a lower stabilizer (22), and the lower part of the lower stabilizer (22) is connected with the second thread protecting sleeve (61).
6. The dual-layer inner barrel conformal coring tool of claim 1, wherein: the fixing piece (81) is a pin.
7. The dual-layer inner barrel conformal coring tool of any one of claims 1-6, wherein: the number of the arc-shaped inner cylinders (8) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543668.3A CN110118070B (en) | 2019-06-21 | 2019-06-21 | Double-deck inner tube shape-preserving coring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543668.3A CN110118070B (en) | 2019-06-21 | 2019-06-21 | Double-deck inner tube shape-preserving coring tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110118070A CN110118070A (en) | 2019-08-13 |
| CN110118070B true CN110118070B (en) | 2024-01-23 |
Family
ID=67524346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910543668.3A Active CN110118070B (en) | 2019-06-21 | 2019-06-21 | Double-deck inner tube shape-preserving coring tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110118070B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5351765A (en) * | 1993-08-31 | 1994-10-04 | Baroid Technology, Inc. | Coring assembly and method |
| US6009960A (en) * | 1998-01-27 | 2000-01-04 | Diamond Products International, Inc. | Coring tool |
| CN202882820U (en) * | 2012-09-28 | 2013-04-17 | 中国石油化工股份有限公司 | Self-washing type loose ground coring tool |
| CN205135490U (en) * | 2015-10-26 | 2016-04-06 | 中国石油集团西部钻探工程有限公司 | Well drilling is cored and is used doublestage linkage |
| CN205400638U (en) * | 2016-03-11 | 2016-07-27 | 四川川庆石油钻采科技有限公司 | Coring tool |
| CN210622746U (en) * | 2019-06-21 | 2020-05-26 | 四川康克石油科技有限公司 | Double-layer inner cylinder shape-preserving coring tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761480B (en) * | 2017-02-16 | 2018-08-28 | 吉林大学 | A kind of underground torque self-balancing has cable drilling system |
-
2019
- 2019-06-21 CN CN201910543668.3A patent/CN110118070B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5351765A (en) * | 1993-08-31 | 1994-10-04 | Baroid Technology, Inc. | Coring assembly and method |
| US6009960A (en) * | 1998-01-27 | 2000-01-04 | Diamond Products International, Inc. | Coring tool |
| CN202882820U (en) * | 2012-09-28 | 2013-04-17 | 中国石油化工股份有限公司 | Self-washing type loose ground coring tool |
| CN205135490U (en) * | 2015-10-26 | 2016-04-06 | 中国石油集团西部钻探工程有限公司 | Well drilling is cored and is used doublestage linkage |
| CN205400638U (en) * | 2016-03-11 | 2016-07-27 | 四川川庆石油钻采科技有限公司 | Coring tool |
| CN210622746U (en) * | 2019-06-21 | 2020-05-26 | 四川康克石油科技有限公司 | Double-layer inner cylinder shape-preserving coring tool |
Non-Patent Citations (1)
| Title |
|---|
| 定向井取心工具的研制及现场应用;许俊良, 毕永进, 周洪国, 龚宁;石油机械(第02期);第35-37页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110118070A (en) | 2019-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103603625B (en) | Casing coring drilling tool and casing coring drilling method | |
| CN101666217B (en) | Core-filling drilling tool of rope side wall | |
| WO2018188527A1 (en) | Process method for exchanging hob and toothed cutter at atmospheric pressure for use in composite stratum shield | |
| CN108952610A (en) | A kind of hydraulic-driven coring tool for Holes of Complicated Wells | |
| CN110118070B (en) | Double-deck inner tube shape-preserving coring tool | |
| CN105525885A (en) | Rotating inserting type coring tool for extremely-loose stratum | |
| CN210622746U (en) | Double-layer inner cylinder shape-preserving coring tool | |
| CN201513122U (en) | Lateral wall reinforcing center drill rig of ropes | |
| CN206928927U (en) | Deep hole inner pipe is automatically notified cord coring drill in place | |
| CN210714547U (en) | Screen pipe cutting and fishing pipe column | |
| CN210422542U (en) | Underground casing milling fishing tool | |
| CN111636838A (en) | Double-partition self-locking three-layer pipe rope coring drilling tool for complex stratum | |
| CN116220576A (en) | Variable diameter drilling tool stabilizer | |
| CN110821449A (en) | Completion pipe string of carbonate rock oil well screen pipe and unfreezing method | |
| CN100532781C (en) | Gas drilling centering technique | |
| CN112282686A (en) | Screen pipe cutting and fishing pipe column | |
| CN114635657B (en) | Drilling coring device and process suitable for coring broken stratum | |
| CN106869796B (en) | A kind of downhole hardware of machinery and jet flow negative pressure double drive | |
| CN212614605U (en) | Double-partition self-locking three-layer pipe rope coring drilling tool for complex stratum | |
| CN112554834B (en) | Midway setting prevention packer and falling rubber treatment method thereof | |
| CN114562210A (en) | Drilling reamer for oil and gas well | |
| CN106854880A (en) | Rig in excavator arm with quartering hammer | |
| CN2858939Y (en) | General paraffin scraper of oil well | |
| CN111305783B (en) | Underground junk salvaging device and salvaging method | |
| CN220247999U (en) | Reaming is with pipe drilling tool that cores |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |