CN106089139B - flexible coring tool - Google Patents
flexible coring tool Download PDFInfo
- Publication number
- CN106089139B CN106089139B CN201610652407.1A CN201610652407A CN106089139B CN 106089139 B CN106089139 B CN 106089139B CN 201610652407 A CN201610652407 A CN 201610652407A CN 106089139 B CN106089139 B CN 106089139B
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- Prior art keywords
- inner cylinder
- ball
- socket
- tool
- core
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/06—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver having a flexible liner or inflatable retaining means
Abstract
The application discloses a kind of flexible coring tool, comprising: sequentially connected core bit mechanism, flex-stem；Rock core inner cylinder is equipped in the flex-stem；The front end of the rock core inner cylinder is provided with suspension mechanism；The suspension mechanism is by the front support of the rock core inner cylinder in the core bit mechanism；The rear end of the rock core inner cylinder is provided with the righting mechanism of its righting.The flex-stem includes the drill pipe nipple of the first tool joint, the second tool joint and multiple head and the tail connection between first tool joint and second tool joint；The flex-stem connects the core bit mechanism by first tool joint.
Description
Technical field
This application involves In Oil Field Exploration And Development field more particularly to a kind of flexible coring tools.
Background technique
In Oil Field Exploration And Development needs the accurate acquisition important geologic information such as oil reservoir initial oil saturation and formation porosity,
To formulate reasonable exploration and development scheme.Mid-late oilfield development needs to check that flood effectiveness, the grease of quantitative analysis oil reservoir are dynamic
State, waterflooded reservoir situation and water drive oil effect improve development plan to make effective enhancing efficiency by relying on tapping internal latent power well stimulation.Coring
And core analysis can be formulated as one of oil gas data, understanding most direct and most important method of reservoir is obtained for development plan
Important evidence is provided with adjustment.
According to coring purpose and operation mode, drilling and coring delivery can be divided into conventional coring and special coring.Sealing core drilling belongs to
Special coring refers to using hermetic core taking tool and sealing fluid, taken out under the conditions of water-base drilling fluid hardly by drilling fluid from
By the rock core of water pollution.
Conventional hermetic core taking tool size is larger, wants when coring to well track and drilling quality etc. in horizontal well drilling
Ask higher.
Various horizontal well hermetic core taking tools used at present can not be in ultra-short radius water of the sidetracking radius less than 3m
It is used in horizontal well or high angle hole, cannot achieve fixed point orientation coring.
Summary of the invention
Technical problem to be solved by the present invention lies in a kind of flexible coring tool is provided, to be suitable for super short radius
The coring of horizontal well works.
In order to achieve the above objectives, the application provides a kind of flexible coring tool, comprising: sequentially connected core bit machine
Structure, flex-stem；Rock core inner cylinder is equipped in the flex-stem；The front end of the rock core inner cylinder is provided with suspension mechanism；Institute
Suspension mechanism is stated by the front support of the rock core inner cylinder in the core bit mechanism；The rear end of the rock core inner cylinder is arranged
Have the righting mechanism of its righting；
The flex-stem include the first tool joint, the second tool joint and be located at first tool joint with
The drill pipe nipple of multiple head and the tail connection between second tool joint；The flex-stem passes through first tool joint
Connect the core bit mechanism；
The drill pipe nipple includes:
The spline bulb that lengthwise extends is provided with the first spline on the side wall of the spline bulb；The spline bulb
One end is provided with bulb, and multiple the first grooves along its circumferentially-spaced arrangement are provided on the side wall of the bulb；
The ball-and-socket mechanism being flexibly connected with the spline bulb；The ball-and-socket mechanism has the spherical cavity for accommodating the bulb
Body；The wall of the spherical cavity is equipped with multiple and one-to-one second groove of first groove；First groove with
Second groove matches to form multiple tracks along the circumferentially-spaced arrangement of the bulb；The track is along the spline bulb
Extending direction arc extends；Roller ball is equipped in the track；The roller ball and first groove and second groove
Wall contact；The ball-and-socket mechanism offers the second spline that can be matched with the first spline.
As a preferred embodiment, the ball-and-socket mechanism includes shell, the first ball-and-socket and end cap；The shell
It is fixedly connected with first ball-and-socket front end and forms the spherical cavity；There is the first spherical structure on the outer wall of the shell；
The rear end of the shell connects the end cap；First ball-and-socket is equipped with second spline；The rear end of the end cap be equipped with
The second spherical structure that first spherical structure matches.
As a preferred embodiment, the shell is connect with first ball-and-socket by shop bolt, it is described outer
Shell is threadedly coupled with the end cap.
As a preferred embodiment, the track is uniformly distributed along the circumferential direction of the bulb.
As a preferred embodiment, being equipped with the roller ball in each track；All rollings
Dynamic ball is generally aligned in the same plane.
As a preferred embodiment, one end of first tool joint is equipped with drilling rod pin thread；Described first bores
The other end of knock-off joint is equipped with the bulb；The ball-and-socket machine is equipped between first tool joint and the drill pipe nipple
Structure；It is female that the first tool joint fixed sleeves are equipped with back；The female shell sphere-contact with the ball-and-socket mechanism of back.
As a preferred embodiment, second tool joint includes the second ball-and-socket and the shell, described the
The spline bulb is equipped between two tool joints and the drill pipe nipple；The rear end of second ball-and-socket is equipped with drilling rod female thread.
As a preferred embodiment, the core bit mechanism include core bit, it is bit adapter, clip, close
Close head, core grabber, shear pin；At least partly described closed head is in the core bit；The clip is in the column drill
It is sheathed on outside the closed head in head；The clip is connect with the core bit by shear pin；The core grabber is arranged
In outside the closed head, the clip relatively described core grabber shrinks the core grabber when moving backward；The bit adapter
The rear end of the core bit is connected with first tool joint；
The first annulus access is equipped between the rock core inner cylinder and the flex-stem；The core bit be equipped with it is described
The fluid course that first annulus access communicates.
As a preferred embodiment, the suspension mechanism is located in the core bit mechanism；The closed head
One end protrude into one end of the suspension mechanism, the other end of the suspension mechanism connects the coring inner drum；The closed head
The coring inner drum can be slipped into；The suspension mechanism can prevent the rotation of the core bit mechanism to be transferred in coring
Cylinder.
As a preferred embodiment, the suspension mechanism includes first bearing component, hanging pup joint；The suspension
One end of pipe nipple is protruded into for the closed head, and the other end connects the coring inner drum；The first bearing assembly set is set to described
Outside hanging pup joint；The rear end cap of the clip is set to outside the front end of the hanging pup joint；The bearing assembly is located at the clip
Rear.
As a preferred embodiment, the righting mechanism is located in second tool joint；The centering guide machine
Structure includes second bearing component, circlip, spring, spring back mother；Step is equipped in second tool joint；The elasticity
Retaining ring is located in the groove in second tool joint；The second bearing assembly set is set to outside the rear end of the rock core inner cylinder
And between the circlip and the step；The spring back mother is connected to the rear end of the rock core inner cylinder, the bullet
Second bearing component described in the contact of spring one end, the back of spring described in other end contact are female.
As a preferred embodiment, the rear end of the rock core inner cylinder is additionally provided with pressure balance mechanism, the pressure
Dynamic balance mechanism is used to balance the pressure inside the rock core inner cylinder.
As a preferred embodiment, the pressure balance mechanism includes that inner cylinder divides water pipe nipple, inner cylinder pressure balance
Piston；The rear end that the inner cylinder divides water pipe nipple to connect the rock core inner cylinder；The inner cylinder, which divides, is equipped with annular projection in water pipe nipple；Portion
The inner cylinder pressure balancing piston is divided to be located at the annular projection front and the wall palette with the rock core inner cylinder, part institute
Inner cylinder pressure balancing piston is stated across the annular projection and divides water pipe nipple to form the second annulus access with the inner cylinder；The ring
Shape protrusion is equipped with through-hole；First annulus access is connected to by the through-hole with second annulus access.
As a preferred embodiment, the rear end of the pressure balancing piston is provided with overflow valve.
By above description as can be seen that the flexible coring tool of the application is equipped with flex-stem, the drilling rod of flex-stem
Pipe nipple cooperatively forms universal merism by spline bulb and ball-and-socket mechanism, so that itself can be bent, multiple drilling rods
The bending that pipe nipple is formed is overlapped so that the flexible coring tool of the application is able to carry out ultra-short radius sidetrack horizontal well
Drillng operation.
Referring to following description and accompanying drawings, only certain exemplary embodiments of this invention is disclosed in detail, specifies original of the invention
Reason can be in a manner of adopted.It should be understood that embodiments of the present invention are not so limited in range.In appended power
In the range of the spirit and terms that benefit requires, embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those skilled in the art without any creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the flexible coring tool structural schematic diagram that a kind of embodiment of the application provides；
Fig. 2 is sectional view at A-A in Fig. 1；
Fig. 3 is sectional view at B-B in Fig. 1.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to guarantor of the present invention
The range of shield.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more
Any and all combinations of relevant listed item.
It please refers to Fig.1 to Fig.3, for the flexible coring tool that a kind of embodiment of the application provides, the flexibility coring tool
Using but be not limited to the drillng operation of ultra-short radius sidetrack horizontal well.In the present embodiment, the flexible coring tool includes
Sequentially connected core bit mechanism 100, flex-stem；Rock core inner cylinder 10 is equipped in the flex-stem；In the rock core
The front end of cylinder 10 is provided with suspension mechanism；The suspension mechanism is by the front support of the rock core inner cylinder 10 in the core bit
In mechanism 100；The rear end of the rock core inner cylinder 10 is provided with the righting mechanism of its righting.
The flex-stem include: the first tool joint 11, the second tool joint 19 and be located at first drilling rod connecting
The drill pipe nipple 200 of multiple head and the tail connection between first 11 and second tool joint 19.The flex-stem passes through described
First tool joint 11 connects the core bit mechanism 100.
Wherein, the drill pipe nipple 200 includes: the spline bulb 17 that lengthwise extends, on the side wall of the spline bulb 17
It is provided with the first spline；One end of the spline bulb 17 is provided with bulb, is provided on the side wall of the bulb multiple along it
First groove of circumferentially-spaced arrangement；The ball-and-socket mechanism being flexibly connected with the spline bulb 17；The ball-and-socket mechanism, which has, to be held
Receive the spherical cavity of the bulb；The wall of the spherical cavity is equipped with multiple recessed with first groove one-to-one second
Slot；First groove matches to form multiple tracks along the circumferentially-spaced arrangement of the bulb with second groove；It is described
Track extends along the 17 extending direction arc of spline bulb；Roller ball 13 is equipped in the track；The roller ball 13 and institute
State the wall contact of the first groove and second groove；The ball-and-socket mechanism offers the second flower that can be matched with the first spline
Key.
When multiple drill pipe nipples 200 join end to end to form flex-stem, as shown in Figure 1, the spline of a drill pipe nipple 200
Bulb 17 protrudes into its ball-and-socket mechanism by previous 200 rear end of drill pipe nipple, makes the first spline and previous drilling rod of a drill pipe nipple 200
Second spline fitted of pipe nipple 200, to be driven；Similarly, which connect with latter drill pipe nipple 200
When, the spline bulb 17 of latter drill pipe nipple 200 protrudes into its ball-and-socket mechanism by 200 rear end of drill pipe nipple, keeps latter drilling rod short
First spline of section 200 and the second spline fitted of the drill pipe nipple 200, to be driven.
By above description as can be seen that the flexible coring tool of present embodiment is equipped with flex-stem, flex-stem
Drill pipe nipple 200 cooperatively forms universal merism by spline bulb 17 and ball-and-socket mechanism, so that itself can be bent,
The bending that multiple drill pipe nipples 200 are formed be overlapped so that the flexible coring tool of present embodiment be able to carry out it is ultrashort
The drillng operation of radius sidetrack horizontal well.
Present embodiment, using the core bit 1 of connection, it is whole soft to form one by flex-stem and with flex-stem
Property chain, this flexible chain and traditional space bend pipe, the guide pipe including multiple laddertrons composition is different.Traditional space bend pipe
Approximate 900 bend pipes can only be bent to a direction, and then no longer performance is flexible upon bending, but it is curved to become one section of rigidity
Pipe, once the outer rim of the rigidity bend pipe on the inside of the borehole wall with rubbing, then rigidity bend pipe voluntarily can not inwardly arch upward at all and keep away
Open obstacle.
The flex-stem for reviewing present embodiment, due to passing through spline bulb 17 and ball between every section of drill pipe nipple 200
Nest mechanism carries out universal joint flexible connection, therefore when grazing occurs for any one section of drill pipe nipple 200 and the borehole wall, this section of drilling rod
Pipe nipple 200 can all carry out appropriately curved, to avoid obstacle, make rod bit downward driving that can advance freely.And for for solid
For the flexible sleeve of well, adjacent two sections of flexible sleeves are flexibly connected by hinged telescoping tube, also can guarantee flexible sleeve energy
It is successfully gone downwards to along drilling well and needs position.
It should be noted that it take core bit 1 as reference that front and rear direction in the application, which is, close to taking in two components
The component of heart drill bit 1 preceding, far from core bit 1 rear；For example, 11 to the second tool joint of the first tool joint, 19 direction
For direction from front to back.
Please continue to refer to Fig. 1,17 lengthwise of spline bulb extends, generally pipe structure.First spline is arranged substantially in
The medium position of 17 length direction of spline bulb.(when with scope of readers to Fig. 1) bulb is located at the rear of the first spline.
The spherical cavity of ball-and-socket mechanism can accommodate spline bulb 17.Wherein, spherical cavity is to be arranged concentrically with bulb, with
Just spline bulb 17 can carry out universal swing, to form bending angle.The outer surface of bulb and the inner surface of spherical cavity
Fitting contact.
As shown in Figure 1 and Figure 2, the second groove being arranged on the first groove of outer wall setting and the wall of spherical cavity of bulb
It is to extend along 17 extending direction of spline bulb (or as shown in Figure 1 from top to bottom or from the bottom to top) arc,
First groove and the second groove contour line arcuately with bulb or spherical cavity match.As shown in Fig. 2, the first groove with
The cross section of second groove is semicircle construction, so that open butt joint forms track.
Specifically, the ball-and-socket mechanism may include shell 12, the first ball-and-socket 15 and end cap 16.The shell 12 is fixed
It connects 15 front end of the first ball-and-socket and forms the spherical cavity.There is the first spherical structure on the outer wall of the shell 12.
The rear end of the shell 12 connects the end cap 16；First ball-and-socket 15 is equipped with second spline.After the end cap 16
End is equipped with the second spherical structure matched with the first spherical structure.
Wherein, shell 12, the first ball-and-socket 15 and end cap 16 are as shown in Figure 1 nested structure or tubular structure, thus with
The drill pipe nipple 200 that spline bulb 17 is formed has the central passage passed through for rock core inner cylinder 10.As shown in Figure 1 shell 12, the
One ball-and-socket 15, end cap 16 are from top to bottom successively arranged.Shell 12 matches to form spherical cavity with the first ball-and-socket 15, shell 12
The groove of inner wall provides the second groove of partial-length, and the groove of the inner wall of the first ball-and-socket 15 provides the second of another part length
Groove, the second groove of partial-length on shell 12 with it is right above and below the second groove of another part length on the first ball-and-socket 15
It connects to form the second groove.
As shown in Figure 1, the front end of end cap 16 is located between shell 12 and the first ball-and-socket 15, meanwhile, on the wall of end cap 16
It is formed with the step of the rear end contact of the rear end and the first ball-and-socket 15 for shell 12.After second spherical structure is set to end cap 16
End is Internal Spherical Surface.First spherical structure is set on the outer wall of shell 12, is spherical outside surface.First spherical structure and the second spherical surface
Structure fits contact, and opposite swing between spline bulb 17 and ball-and-socket mechanism carries out guiding auxiliary, meanwhile, avoid foul
Movable spherical surface between the first ball-and-socket 15 and bulb.
As shown in figure 3, the first ball-and-socket 15 is provided with the second spline, the second spline be internal spline and with (next drill pipe nipple
200) first spline matches.Wherein, the second spline is located at the rear of spherical cavity.Spline bulb 17 passes through with ball-and-socket mechanism
Spline fitted can produce the transmitting that torque is kept with respect to sliding, consequently facilitating generating between two neighboring drill pipe nipple 200
Bending.
Further, the shell 12 is connect with first ball-and-socket 15 by shop bolt 14, to prevent shell 12
It produces relative rotation between the first ball-and-socket 15.The shell 12 is threadedly coupled with the end cap 16.The track is along the ball
The circumferential direction of head is uniformly distributed.The roller ball 13 is equipped in each track.All roller balls 13 are located at same
One plane to both be able to satisfy the bending of drill pipe nipple 200, while can preferably transmit torque.The quantity of the track is many
In 4.As shown in Fig. 2, the quantity of the track is 8, the quantity of roller ball 13 is similarly 8.First spline is outer
Spline, second spline are internal spline.Sealing ring is equipped between the roller ball 13 and the wall of the spherical cavity, it is described close
Seal is located at the rear of the track.
In one embodiment, the first tool joint 11 is similarly with drill pipe nipple 200 is flexibly connected, the second drilling rod connecting
First 19 with drill pipe nipple 200 similarly to be flexibly connected.
Specifically, as shown in Figure 1, one end of first tool joint 11 is equipped with drilling rod pin thread.First drilling rod connecting
First 11 other end is equipped with the bulb.The ball-and-socket is equipped between first tool joint 11 and the drill pipe nipple 200
Mechanism.It can be equipped with outside first tool joint 11 with fixing sleeve and carry on the back female (not shown).The back mother and the ball-and-socket mechanism
12 sphere-contact of shell.
Further, described as shown in Figure 1, second tool joint 19 includes the second ball-and-socket 19 and the shell 12
The spline bulb 17 is equipped between second tool joint 19 and the drill pipe nipple 200；The rear end of second ball-and-socket 19 is set
There is drilling rod female thread.Second ball-and-socket 19 is different from the first ball-and-socket 15, and the second ball-and-socket 19 is simultaneously not provided with spline.After second ball-and-socket 19
End be equipped with drilling rod female thread with other component phase screwed connection.
Drill pipe nipple 200 can be bent in the present embodiment, i.e., generate between ball-and-socket mechanism and spline bulb 17 opposite
It swings.Preferably, the camber degree of the drill pipe nipple 200 is 4 degree to 8 degree.So set, 5 1/2 " in (5 cun half) well
Ultra-short radius sidetrack horizontal well or high angle hole drillng operation that deflecting radius is 1.5-2 meters can be smoothly completed.Specifically, institute
The length for stating flex-stem can be 9 meters to 10 meters.
Please continue to refer to Fig. 1, the core bit mechanism 100 may include core bit 1, bit adapter 9, clip 3, close
Close first 4, core grabber 5, shear pin 2.At least partly described closed head 4 is in the core bit 1.The clip 3 is described
It is sheathed in core bit 1 outside the closed head 4.The clip 3 is connect with the core bit 1 by shear pin 2.It is described
Core grabber 5 is sheathed on outside the closed head 4, and the clip 3 relatively described core grabber 5 receives the core grabber 5 when moving backward
Contracting.The rear end of the core bit 1 is connected by the bit adapter 9 with first tool joint 11.
The core bit 1 generally structure of tube body is arc transition between outer wall inward wall, consequently facilitating drilling.
Closed head 4 is inserted in core bit 1.The front end of closed head 4 is hemispheres.The inside of the core bit 1 is equipped with for card
The step of the front end contact of hoop 3.Clip 3 it is interior equipped with the first conical surface being gradually expanded from front to back.Core grabber 5 is located at card
In hoop 3, and core grabber 5 is externally provided with the second conical surface with the cooperation of the first conical surface of clip 3.As shown in Figure 1, core grabber
Front end (or top) reserved part distance of 5 front end and the first conical surface, when clip 3 is moved backward with respect to core grabber 5,
First conical surface shrinks core grabber 5.5 inner wall of core grabber is equipped with helical teeth, can live rock core with anchor.The quantity of shear pin 2
Generally multiple (one can also with).
The first annulus access 29 is equipped between the rock core inner cylinder 10 and the flex-stem.The core bit 1 is equipped with
The fluid course 28 communicated with first annulus access 29.Specifically, fluid course 28 is set to core bit 1, drill bit connects
On first 9 wall, in order to the flowing of drilling fluid.As shown in Figure 1, the front end of bit adapter 9 is equipped with external screw thread and internal screw thread.Drill bit
The front end of connector 9 extend into core bit 1 and is threadedly coupled with core bit 1 and clip 3.
The suspension mechanism is located in the core bit mechanism 100；The suspension machine is protruded into one end of the closed head 4
The other end of one end of structure, the suspension mechanism connects the coring inner drum；The closed head 4 can slip into the coring
Cylinder；The suspension mechanism can prevent the rotation of the core bit mechanism 100 to be transferred to coring inner drum.
Specifically, the suspension mechanism includes first bearing component 7, hanging pup joint 8.One end of the hanging pup joint 8 supplies
The closed head 4 protrudes into, and the other end connects the coring inner drum.The first bearing component 7 is sheathed on the hanging pup joint 8
Outside.The rear end cap of the clip 3 is set to outside the front end of the hanging pup joint 8.The first bearing component 7 is located at the clip 3
Rear.
The first sealing ring, bit adapter 9 and hanging pup joint 8 are equipped between the rear end of clip 3 and the front end of hanging pup joint 8
The second sealing ring is equipped between rear end.First bearing component 7 is between the first sealing ring and the second sealing ring.Wherein, first
Bearing assembly 7 may include bearing 7 (such as: tapered roller bearing), bearing holder (housing, cover) 6.Bearing 7 is fixed in bearing holder (housing, cover) 6, bearing holder (housing, cover)
6 are sheathed in bit adapter 9 (core bit 1).It (can be cyclic annular or convex that the outer wall of hanging pup joint 8, which is equipped with bulge-structure 81,
Block).The front end of bearing assembly contacts resist simultaneously with the rear end of clip 3, bulge-structure 81.The inside of clip 3 is close to rear end position
Install the step for being equipped with and cooperating with bulge-structure 81.Reserved part distance between the step and bulge-structure 81.It is reserved by this
Distance, well is outside upper when mentioning the flexibility coring tool, and core bit 1 drives clip 3 (when with scope of readers to Fig. 1) to move down and (move back),
Core grabber 5 by rock core pinch off, meanwhile, by step and the contact of bulge-structure 81 of clip 3, to take out of outside well together.
Please continue to refer to Fig. 1, the righting mechanism is located in second tool joint 19.The righting mechanism includes the
Two bearing assemblies 21, circlip 24, spring 25, spring back mother 26.Wherein, step is equipped in second tool joint 19；
The circlip 24 is located in the groove in second tool joint 19.The second bearing component 21 is sheathed on the rock
Outside the rear end of intracardiac cylinder 10 and between the circlip 24 and the step.The spring back mother 26 is connected to the rock
The rear end of intracardiac cylinder 10, second bearing component 21 described in 25 one end contact of spring, spring back mother 26 described in other end contact.
The rear end of the rock core inner cylinder 10 is additionally provided with pressure balance mechanism, and the pressure balance mechanism is described for balancing
Pressure inside rock core inner cylinder 10.Specifically, the pressure balance mechanism may include that inner cylinder divides water pipe nipple 18, inner cylinder pressure flat
Weigh piston 20.The rear end that the inner cylinder divides water pipe nipple 18 to connect the rock core inner cylinder 10.The inner cylinder, which divides in water pipe nipple 18, to be equipped with
Annular projection.The part inner cylinder pressure balancing piston 20 is located in front of the annular projection and the wall with the rock core inner cylinder 10
Palette, the part inner cylinder pressure balancing piston 20 pass through the annular projection and divide the formation of water pipe nipple 18 with the inner cylinder
Second annulus access 31.The annular projection is equipped with through-hole 30.The through-hole 30 by first annulus access 29 with it is described
The connection of second annulus access 31.Rear end for the pressure for further balancing rock core inner cylinder 10, the pressure balancing piston 20 is arranged
There is overflow valve 27 (attached drawing is only illustrative nature).
At this point, spring back mother 26 is threadedly connected to the rear end that inner cylinder divides water pipe nipple 18.The internal diameter and inner cylinder of rock core inner cylinder 10
The internal diameter of water pipe nipple 18 is divided to communicate, so as to sliding back and forth for dummy piston 20.Second bearing component 21 may include the (ratio of bearing 21
Such as: tapered roller bearing), bearing outer ring carries on the back female 23, bearing compression ring 22.Bearing 21 is fixed on bearing compression ring 22 and the second ball
In between the step of the inner wall of nest 19, bearing outer ring back mother 23 is connected through a screw thread fixing sleeve in the second ball-and-socket 19.Bearing
Compression ring 22 is sheathed in bearing outer ring back mother 23, and by 25 contact of spring.
The coring process of the flexible coring tool using above embodiment is described more fully below: (1) by ultra-short radius
Sidetracked hole is drilled into predetermined coring position；(2) by the flexible coring tool of present embodiment down toward coring position；(3) well outer circulation
Drilling fluid, slowly starts rotary power, and drilling fluid passes sequentially through the second annulus access 31, through-hole 30, the first annulus access 29, liquid
Circulation road 28 cleans the landwaste that shaft bottom is precipitated；(4) increase bit pressure outside well, core bit mechanism 100 starts to drill through rock core；(5)
Pushing of the closed head 4 by rock core, shear pin 2 are cut by closed head 4, and closed head 4 is under the promotion of rock core to rock core inner cylinder
10 inside retractions；(6) closed head 4 will squeeze the sealing fluid in rock core inner cylinder 10, and sealing fluid is excessive to rock core position by closed head 4
It sets, rock core is wrapped up；(7) core bit mechanism 100 constantly drills through rock core, and the sealing fluid in rock core inner cylinder 10 constantly wraps up
Rock core, until drilling through sufficiently long rock core；(8) drilling tool being mentioned on well head, entire flexibility coring tool is detached from bit operation face, this
When, core grabber 5 can hold rock core tightly, the conical outer surface of core grabber 5 and the cone-shaped inner surface of clip 3 are matched under upper lifting force effect
It closes, rock core the more is drawn the more tight, until rock core is broken, the heart is cut in realization；(9) continue above to mention drilling tool, rock core is proposed into well head；(10) it takes
The rock core inner cylinder 10 for filling rock core out, rock core is encapsulated spare.
Herein cited any digital value all include between lower limit value to upper limit value with the lower value of an incremented and
The all values of upper value, there are the intervals of at least two units between any lower value and any much higher value.For example, such as
Fruit elaborates that the quantity an of component or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 20
To 80, more preferably from 30 to 70, then purpose is arrived in order to illustrate also clearly listing such as 15 to 85,22 in the specification
68,43 to 51,30 to 32 is equivalent.For the value less than 1, suitably think that a unit is 0.0001,0.001,0.01,0.1.
These are only intended to the example clearly expressed, it is believed that all possibility for the numerical value enumerated between minimum and peak
Combination is all expressly set forth in the specification in a similar manner.
Unless otherwise indicated, all ranges all include all numbers between endpoint and endpoint.It is used together with range
" about " or " approximation " be suitable for two endpoints of the range.Thus, " about 20 to 30 " are intended to cover that " about 20 to about
30 ", including at least the endpoint indicated.
All articles and reference disclosed, including patent application and publication, for various purposes by quoting knot
Together in this.Describing combined term " substantially by ... constitute " should include identified element, ingredient, component or step and reality
Other elements, ingredient, component or the step of the basic novel feature of the combination are not influenced in matter.Using term "comprising" or
" comprising " describes the combination of element here, ingredient, component or step it is also contemplated that substantially by these elements, ingredient, component
Or the embodiment that step is constituted.Here by using term " can with ", it is intended to illustrate that " can with " includes described any
Attribute is all optional.
Multiple element, ingredient, component or step can be provided by single integrated component, ingredient, component or step.Optionally
Ground, single integrated component, ingredient, component or step can be divided into multiple element, ingredient, component or the step of separation.It is used to
The open "a" or "an" for describing element, ingredient, component or step is not said to exclude other elements, ingredient, component
Or step.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except provided example all will be aobvious and easy for a person skilled in the art
See.Therefore, the range of this introduction should not be determined referring to foregoing description, but should referring to appended claims and this
The full scope of the equivalent that a little claims are possessed determines.For comprehensive purpose, all articles and with reference to including special
The disclosure of benefit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as inventor the theme is not thought of as it is disclosed
A part of subject matter.
Claims (13)
1. a kind of flexibility coring tool characterized by comprising sequentially connected core bit mechanism, flex-stem；It is described soft
Rock core inner cylinder is equipped in property drilling rod；The front end of the rock core inner cylinder is provided with suspension mechanism；The suspension mechanism is by the rock
The front support of intracardiac cylinder is in the core bit mechanism；The rear end of the rock core inner cylinder is provided with the centering guide machine of its righting
Structure；
The flex-stem include the first tool joint, the second tool joint and be located at first tool joint with it is described
The drill pipe nipple of multiple head and the tail connection between second tool joint；The flex-stem is connected by first tool joint
The core bit mechanism；
The drill pipe nipple includes:
The spline bulb that lengthwise extends is provided with the first spline on the side wall of the spline bulb；One end of the spline bulb
It is provided with bulb, multiple the first grooves along its circumferentially-spaced arrangement are provided on the side wall of the bulb；
The ball-and-socket mechanism being flexibly connected with the spline bulb；The ball-and-socket mechanism has the spherical cavity for accommodating the bulb；
The wall of the spherical cavity is equipped with multiple and one-to-one second groove of first groove；First groove with it is described
Second groove matches to form multiple tracks along the circumferentially-spaced arrangement of the bulb；The track extends along the spline bulb
Direction arc extends；Roller ball is equipped in the track；The wall of the roller ball and first groove and second groove
Contact；The ball-and-socket mechanism offers the second spline that can be matched with the first spline；
The ball-and-socket mechanism includes shell, the first ball-and-socket and end cap；The shell is fixedly connected with first ball-and-socket front end simultaneously
Form the spherical cavity；There is the first spherical structure on the outer wall of the shell；The rear end of the shell connects the end cap；
First ball-and-socket is equipped with second spline；The rear end of the end cap is equipped with the second spherical surface matched with the first spherical structure
Structure.
2. flexibility coring tool as described in claim 1, it is characterised in that: the shell and first ball-and-socket pass through positioning
Pin connection, the shell are threadedly coupled with the end cap.
3. flexibility coring tool as described in claim 1, it is characterised in that: the track uniformly divides along the circumferential of the bulb
Cloth.
4. flexibility coring tool as described in claim 1, it is characterised in that: be equipped with the rolling in each track
Dynamic ball；All roller balls are generally aligned in the same plane.
5. flexibility coring tool as described in claim 1, it is characterised in that: one end of first tool joint is equipped with drilling rod
Pin thread；The other end of first tool joint is equipped with the bulb；Between first tool joint and the drill pipe nipple
Equipped with the ball-and-socket mechanism；It is female that the first tool joint fixed sleeves are equipped with back；The back is female outer with the ball-and-socket mechanism
Shell sphere-contact.
6. flexibility coring tool as described in claim 1, it is characterised in that: second tool joint include the second ball-and-socket and
The shell is equipped with the spline bulb between second tool joint and the drill pipe nipple；After second ball-and-socket
End is equipped with drilling rod female thread.
7. flexibility coring tool as described in claim 1, it is characterised in that: the core bit mechanism include core bit,
Bit adapter, clip, closed head, core grabber, shear pin；At least partly described closed head is in the core bit；It is described
Clip is sheathed on outside the closed head in the core bit；The clip and the core bit are connected by shear pin
It connects；The core grabber is sheathed on outside the closed head, and the clip relatively described core grabber makes the core grabber when moving backward
It shrinks；The rear end of the core bit is connected by the bit adapter with first tool joint；
The first annulus access is equipped between the rock core inner cylinder and the flex-stem；The core bit is equipped with and described first
The fluid course that annulus access communicates.
8. flexibility coring tool as claimed in claim 7, it is characterised in that: the suspension mechanism is located at the core bit machine
In structure；One end of the suspension mechanism is protruded into one end of the closed head, and the other end of the suspension mechanism connects the rock core
Inner cylinder；The closed head can slip into the rock core inner cylinder；The suspension mechanism can prevent turning for the core bit mechanism
It is dynamic to be transferred to rock core inner cylinder.
9. flexibility coring tool as claimed in claim 8, it is characterised in that: the suspension mechanism include first bearing component,
Hanging pup joint；One end of the hanging pup joint is protruded into for the closed head, and the other end connects the rock core inner cylinder；The first axle
Bearing assembly is sheathed on outside the hanging pup joint；The rear end cap of the clip is set to outside the front end of the hanging pup joint；The bearing
Component is located at the rear of the clip.
10. flexibility coring tool as claimed in claim 9, it is characterised in that: the righting mechanism is located at second drilling rod
In connector；The righting mechanism includes second bearing component, circlip, spring, spring back mother；In second tool joint
Equipped with step；The circlip is located in the groove in second tool joint；The second bearing assembly set is set to institute
It states outside the rear end of rock core inner cylinder and between the circlip and the step；The spring back mother is connected to the rock core
The rear end of inner cylinder, second bearing component described in the spring one end contact, spring back described in other end contact are female.
11. flexibility coring tool as claimed in claim 10, it is characterised in that: the rear end of the rock core inner cylinder is additionally provided with pressure
Dynamic balance mechanism, the pressure balance mechanism are used to balance the pressure inside the rock core inner cylinder.
12. flexibility coring tool as claimed in claim 11, it is characterised in that: the pressure balance mechanism includes that inner cylinder divides water
Pipe nipple, inner cylinder pressure balancing piston；The rear end that the inner cylinder divides water pipe nipple to connect the rock core inner cylinder；The inner cylinder divides water pipe nipple
It is interior to be equipped with annular projection；The part inner cylinder pressure balancing piston be located in front of the annular projection and with the rock core inner cylinder
Wall palette, the part inner cylinder pressure balancing piston pass through the annular projection and divide water pipe nipple to form the with the inner cylinder
Two annulus access；The annular projection is equipped with through-hole；The through-hole leads to first annulus access and second annular space
Road connection.
13. flexibility coring tool as claimed in claim 12, it is characterised in that: the rear end of the pressure balancing piston is provided with
Overflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610652407.1A CN106089139B (en) | 2016-08-10 | 2016-08-10 | flexible coring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610652407.1A CN106089139B (en) | 2016-08-10 | 2016-08-10 | flexible coring tool |
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| Publication Number | Publication Date |
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| CN106089139A CN106089139A (en) | 2016-11-09 |
| CN106089139B true CN106089139B (en) | 2018-12-25 |
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| CN201610652407.1A Active CN106089139B (en) | 2016-08-10 | 2016-08-10 | flexible coring tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106529A (en) * | 2017-11-18 | 2018-06-01 | 中国石油天然气集团公司 | A kind of memory type measurement while drilling rock core length device and system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761510B (en) * | 2016-11-15 | 2019-11-08 | 中国石油天然气股份有限公司 | Flexible coring tool |
| CN108005603B (en) * | 2017-12-20 | 2019-12-10 | 中国石油天然气股份有限公司 | flexible closed coring tool |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3804184A (en) * | 1973-03-08 | 1974-04-16 | M Gusman | Core drilling apparatus |
| US4566545A (en) * | 1983-09-29 | 1986-01-28 | Norton Christensen, Inc. | Coring device with an improved core sleeve and anti-gripping collar with a collective core catcher |
| CN201050318Y (en) * | 2007-05-22 | 2008-04-23 | 辽河石油勘探局 | Loose ground closed core-picking tool |
| CN201614888U (en) * | 2010-01-28 | 2010-10-27 | 大庆亨得利石油技术服务有限公司 | Horizontal well flexible drilling tool |
| CN202047748U (en) * | 2011-04-19 | 2011-11-23 | 北京百利时能源技术有限责任公司 | Ultra short radius horizontal well flexible drilling tool |
| CN203130004U (en) * | 2013-01-11 | 2013-08-14 | 中国石油化工股份有限公司 | Two-bearing hanging device of sealed coring tool |
| CN103603625B (en) * | 2013-12-06 | 2017-04-26 | 中国地质科学院探矿工艺研究所 | Casing coring drilling tool and casing coring drilling method |
-
2016
- 2016-08-10 CN CN201610652407.1A patent/CN106089139B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106529A (en) * | 2017-11-18 | 2018-06-01 | 中国石油天然气集团公司 | A kind of memory type measurement while drilling rock core length device and system |
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| CN106089139A (en) | 2016-11-09 |
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