CN104234683B - A kind of diameter changing mechanism - Google Patents
A kind of diameter changing mechanism Download PDFInfo
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- CN104234683B CN104234683B CN201410463178.XA CN201410463178A CN104234683B CN 104234683 B CN104234683 B CN 104234683B CN 201410463178 A CN201410463178 A CN 201410463178A CN 104234683 B CN104234683 B CN 104234683B
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Abstract
The invention belongs to oil gas field reservoir reconstruction equipment technical field, discloses a kind of diameter changing mechanism.Coordinated by the sliding sleeve with reducing district, sliding sleeve central tube, track pipe, can achieve the reciprocating motion of sliding sleeve central tube, the reciprocating number of times of sliding sleeve central tube is determined by track groove on track pad.The diameter changing mechanism is used in the sliding sleeve of bushing of pressing crack construction, by the position of the track groove and pin of planned course pipe in the pipe of track, arranges the steel ball quantity that can pass through per one-level sliding sleeve switch, so as to realize the unlatching step by step of sliding sleeve switch.
Description
Technical field
The present invention relates to oil gas field reservoir reconstruction equipment technical field, specially a kind of diameter changing mechanism.
Background technology
Many advantages, such as small borehole bushing sliding sleeve well-completing process has shaft building low cost, cycle is short, big pressure break scale may
Domestic ultra-low penetration oil field gas well oil such as gas well straight well, the main completion mode of directional well can be become.
It is applied to the sliding sleeve of bushing ball-throwing type casing valve for mainly having series limited of slim-hole and the " nothing for throwing dartlike weapon formula at present
Limit " level casing valve." unlimited " the level sliding sleeve of bushing for throwing dartlike weapon formula has the advantages that series is more, but this sliding sleeve of bushing structure is multiple
Miscellaneous, instrument high cost opens success rate bottom.Schlumberger and An Dong oil dartlike weapon formula infinite stages sliding sleeve of bushing also do not possess at present
Scale use condition.
The casing valve that ball-throwing type is opened has opens success rate height, instrument low cost and other advantages, is widely used.
The sliding sleeve of bushing for having used is reducing pitching, i.e. the ball of throwing different size opens multistage sliding sleeve, multistage sliding sleeve from bottom to top step by step
Internal diameter need to increase step by step.But, current well completion of casing sliding sleeve mainly using 3.5 inches of sleeve pipes, is limited by inside/outside diameter size
Larger, this kind of casing valve is limited by latus rectum in tubing string, and the sleeve pipe in the case where cementing conditions are met currently for 3.5 cun can only be accomplished
2 grades, 3 layers of pressing crack construction are realized, it is difficult to adapt to the exploitation of many series of strata.But, the distribution of gas field gas-bearing formation is distributed in many series of strata, this kind of
Sliding sleeve of bushing can not meet the needs of engineering, need to break through to more series.
The backwardness of sleeve pipe valve technology hinders petroleum resources to a certain extent and preferably exploits.Therefore, it is necessary to design out
Send out the exploitation of many series of strata sliding sleeve of bushing of ball-throwing type and mechanical " unlimited " level sliding sleeve of bushing.Its technological difficulties is how to realize leading to
The ball for crossing one specification of throwing is realized opening level sliding sleeve step by step.
Content of the invention
In order to solve 3.5 inches of sleeve pipes that current well completion of casing sliding sleeve is used, limited by inside/outside diameter size larger, for change
The sliding sleeve of bushing of footpath pitching, can only at most connect two-stage and transform 3 layers, it is difficult to adapt to the technical problem of the exploitation of many series of strata, the present invention
Sliding sleeve of bushing for small diameter borehole devises a kind of sliding sleeve with reducing district, track pad and diameter changing mechanism.
An object of the present invention is to provide a kind of sliding sleeve with reducing district and sliding sleeve central tube, and ball seat is in the sliding sleeve
Reducing district can achieve expanding.
The second object of the present invention is to provide a kind of track pipe, and the track pad can be oriented to the part list moved along its track groove
Inwardly move.
The third object of the present invention is to provide a kind of diameter changing mechanism, is coordinated with track pipe by the sliding sleeve of reducing district, can be real
The reciprocating motion of existing sliding sleeve.Multistage sliding sleeve switch comprising the diameter changing mechanism, can achieve to throw in a kind of multiple rule successively from well head
The ball of lattice, realizes opening multiple underground sliding bush switchings from bottom to top step by step, and then realizes being layered successively pressing crack construction from bottom to top.
The technical solution used in the present invention is：A kind of diameter changing mechanism, including sleeve pipe, is set with reducing in described sleeve pipe
Area's sliding sleeve, is also arranged with sliding sleeve central tube in the sliding sleeve, is provided with one and radially extends along tube wall on the sliding sleeve central tube
Position-limitting pin；Sliding sleeve central tube upper end is placed in the reducing district of sliding sleeve；
The sliding sleeve lower end is also arranged with sleeve base, and the lower end end of sliding sleeve central tube is placed in sleeve base, sliding sleeve lower end
Cavity is formed between sliding sleeve central tube；
Track pipe is arranged with the cavity, offers the tortuous rail for extending circumferential around body on the body of the track pipe
Mark groove, the free end of position-limitting pin are placed in the track groove of track pipe；
Positioned axially between the sliding sleeve central tube and track tube wall have spring.
A kind of sliding sleeve with reducing district, including sliding sleeve body, is provided with annular in the upstream end port of the sliding sleeve body
Protuberance；
The protuberance along the end for extending axially inwardly of sliding sleeve body, be to expand to the annular of the outside depression in sliding sleeve body footpath
Footpath area, the inner surface in the annular expanding area is arc-shaped concave or arc sphere.
A kind of sliding sleeve central tube, is provided with a projection on the sliding sleeve central tube tube wall outer wall, sets on the projection lateral surface
It is equipped with a position-limitting pin radially extended along tube wall.
A kind of track pipe, including body, it is characterised in that：The tortuous rail for extending circumferential around body is offered on the body
Mark groove, the track groove include multiple axial track sections up and down staggeredly parallel to body axial direction, adjacent axial track section
By the first oblique orbit segment connection；
The inner side edge of the first adjacent oblique orbit segment connects so as to constitute " V " zag trajectory groove section, and each first oblique
Orbit segment is equal with the angle of body axis；
The plurality of axial track section includes initial axial track section, end axial track section and is placed in the starting axial direction rail
Multiple middle axial direction orbit segment between mark section, end axial track section；
Initial axial track section is along body axial direction linear extension, and its two side is parallel, and two sides are towards track tube end
Side is connected by cylindrical segmental arc；Middle axial direction orbit segment and end axial direction rail section include putting down with the side of the first oblique orbit segment
The hypotenuse and the straight flange axially in parallel with body of row docking, and the straight flange closes on end axial track section side, straight flange and hypotenuse
Connecting portion is connected by cylindrical segmental arc；The straight flange of end axial direction rail section is connected with the outer side edges of the adjacent first oblique orbit segment
Portion is connected by cylindrical segmental arc；
The connecting portion of the inner side edge of the first adjacent oblique orbit segment is connected by inner circle segmental arc, in the inner circle segmental arc
Line is not conllinear with the center line of each axial track section and is partial to initial axial track section.
In a kind of track pipe, further, the outer side edges of the straight flange of the end axial track section and the second oblique orbit segment
Parallel connect, the inner side edge side of the second oblique orbit segment is connected with the outer side edges of the adjacent first oblique orbit segment, and second is oblique
The first oblique orbit segment is less than to track segment length.
In a kind of diameter changing mechanism, further, the number of diameter changing of the diameter changing mechanism by track pipe track groove limit point
Number determines.
Further, reducing ball seat is also arranged with the annular protrusion of the sliding sleeve, and the reducing ball seat is located at sliding sleeve ring
Shape protuberance upper end end.
The reducing ball seat is " C " global seat.
Or the reducing ball seat is a point lobe slips ball seat.
Beneficial effects of the present invention：A kind of diameter changing mechanism of the present invention, by the sliding sleeve with reducing district, sliding sleeve central tube
Coordinate with the track groove on the pipe of track, can achieve the reciprocating motion of sliding sleeve central tube, the reciprocating number of times of sliding sleeve central tube by
On track pad, track groove determines.This diameter changing mechanism is used in the ball-throwing type casing valve of pressing crack construction, it is possible to achieve by from well head
Throw in a kind of ball of multiple specifications successively, realize opening multiple underground sliding bush switchings from bottom to top step by step, so realize from lower and
Higher slice successively pressing crack construction, improves efficiency of construction.The number of times that ball passes through can be preset, the sliding sleeve in same tubing string from bottom to top
The chance ball number of pass times of switch respectively 0,1,2,3 ... is secondary, when sliding sleeve switch meets ball number of pass times is 0, you can open sliding sleeve
Switch.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples, but they do not constitute to the present invention and limit.
Fig. 1 is the shift sleeve structure schematic diagram with reducing district.
Fig. 2 is sliding sleeve center tube structure schematic diagram.
Fig. 3 is that Local map is launched in track Guan Zhou sides.
Fig. 4 launches Local map for the axle side of track pipe another embodiment.
Fig. 5 is diameter changing mechanism structural representation.
Fig. 6 is the structural representation that diameter changing mechanism is used in casing valve.
Fig. 7 is schematic diagram of the steel ball by undergauge area.
Fig. 8 is schematic diagram of the steel ball by expanding area.
Fig. 9 is multistage shift sleeve structure schematic diagram.
Figure 10 is that Local map is launched in third level sliding sleeve track Guan Zhou sides.
Figure 11 is that Local map is launched in second level sliding sleeve track Guan Zhou sides.
Figure 12 is that Local map is launched in first order sliding sleeve track Guan Zhou sides.
In figure：1st, top connection；2nd, sleeve pipe；3rd, reducing ball seat；4th, sliding sleeve 5, sliding sleeve central tube；6th, sliding sleeve shear pin；7th, spacing
Pin；8th, track pipe；9th, spring；10th, sleeve base；11st, central tube shear pin；12nd, lower contact；13rd, steel ball；14 undergauge areas；15 expand
Footpath area；16 axial track sections；17th, oblique orbit segment；18th, initial axial track section；19th, middle axial direction orbit segment；20th, end axle
To orbit segment；21st, cylindrical segmental arc；22nd, hypotenuse；23rd, straight flange；24th, inner circle segmental arc；25th, the second oblique orbit segment；26th, inner side edge；
27th, outer side edges.
Specific embodiment
Upper and lower described in way of example, under being upper, to shaft bottom direction be to well head direction, the front end, near upper
Extreme direction is front, and the end is lower end end, in addition to track pipe 8, described inside and outside, is outer, edge along sleeve pipe radial direction to tube wall direction
Sleeve pipe radial direction is interior to tube wall rightabout.
For realizing in pressing crack construction, ball-throwing type casing valve can be thrown the ball of same specification and realize that unlatching is more step by step from bottom to top
Individual underground sliding bush switching, so realize be layered successively pressing crack construction from bottom to top, there is provided a kind of for casing valve in one kind
Diameter changing mechanism.It is specifically described by embodiment 1 to 5 respectively.
Embodiment 1
A kind of diameter changing mechanism, including sleeve pipe, is set with described sleeve pipe 2 with reducing district sliding sleeve 4, goes back in the sliding sleeve 4
Sliding sleeve central tube 5 is arranged with, a position-limitting pin 7 radially extended along tube wall on the sliding sleeve central tube 5, is provided with；Sliding sleeve center
5 upper end of pipe is placed in the reducing district of sliding sleeve 4；
4 lower end of the sliding sleeve is also arranged with sleeve base 10, and the lower end end of sliding sleeve central tube 5 is placed in sleeve base 10, sliding
Cover formation cavity between 4 lower ends and sliding sleeve central tube 5；
Track pipe 8 is arranged with the cavity, is offered around the circumferential tortuous extension of body on the body of the track pipe 8
Track groove, the free end of position-limitting pin 7 are placed in the track groove of track pipe 8；
Positioned axially between 8 tube wall of the sliding sleeve central tube 5 and track pipe have spring 9.
A kind of its structural representation of specific embodiment is as shown in Figure 4.
Embodiment 2
Used as a kind of preferred version of embodiment 1, the sliding sleeve 4 with reducing district in a kind of diameter changing mechanism, its structure show
It is intended to as shown in Figure 1.Including 4 body of sliding sleeve, 4 body of sliding sleeve is provided with annular protrusion towards in upstream end port；
The protuberance along the end for extending axially inwardly of 4 body of sliding sleeve, be annular to the outside depression in 4 body footpath of sliding sleeve
Expanding area 15, the inner surface in the annular expanding area 15 is arc-shaped concave or arc sphere.
The annular protrusion of the sliding sleeve 4 is reducing district, and reducing district front end is annular undergauge area 14, and end is annular expanding
Area 15,14 diameter of undergauge area are less than 15 diameter of expanding area.In the present embodiment, steel ball 13 with diameter greater than 4 undergauge area 14 of sliding sleeve
Diameter and the diameter less than 4 expanding area 15 of sliding sleeve.
Embodiment 3
Used as a kind of preferred version of embodiment 1, the sliding sleeve central tube 5 in a kind of diameter changing mechanism, its structural representation is such as
Shown in Fig. 2, the sliding sleeve central tube 5 includes tube wall, is provided with a projection on the tube wall outer wall, arranges on the projection lateral surface
There is a spacer pin 7 radially extended along tube wall.
The sliding sleeve central tube 5 of the present embodiment can be sheathed in the sliding sleeve 4 with reducing district of embodiment 1, and can be had
The sliding sleeve 4 of reducing district is lower vertically in vivo to be moved.
Embodiment 4
Used as a kind of preferred version of embodiment 1, the track pipe 8 in a kind of diameter changing mechanism, including body, on the body
Offer the track groove for extending circumferential tortuous around body, the track groove include multiple parallel to body axial direction up and down staggeredly
Axial track section 16, adjacent axial track section are connected by the first oblique orbit segment 17；
The inner side edge 26 of the first adjacent oblique orbit segment 17 connects so as to constituting " V " zag trajectory groove section, and each first
Oblique orbit segment 17 is equal with the angle of body axis；
The plurality of axial track section 16 includes initial axial track section 18, end axial track section 20 and is placed in the starting
Axial direction orbit segment 19 in the middle of multiple between axial track section 18, end axial track section 20；
Initial axial track section 18 is along body axial direction linear extension, and its two side is parallel, and two sides are towards 8 end of track pipe
Portion side is connected by cylindrical segmental arc 21；The axial rail section 20 of middle axial direction orbit segment 19 and end includes and the first oblique orbit segment
The hypotenuse 22 of 17 side parallel docking and the straight flange 23 axially in parallel with body, and the straight flange 23 closes on end axial track section
20 sides, straight flange 23 are connected by cylindrical segmental arc 21 with 22 connecting portion of hypotenuse；The straight flange 23 of the end axial direction rail section 20 and phase
27 connecting portion of outer side edges of adjacent first oblique orbit segment 17 is connected by cylindrical segmental arc 21；
The connecting portion of the inner side edge 26 of the first adjacent oblique orbit segment 17 is connected by inner circle segmental arc 24, the Inner arc
The center line of section 24 is not conllinear with the center line of each axial track section 16 and is partial to initial axial track section 18.
The part axle side expanded view of track pipe 8 is as shown in Figure 3.
As another kind preferably, the end axial track section of the track groove of the track pipe 8 of the present embodiment can also be, described
The straight flange 23 of end axial track section 20 is parallel with the outer side edges 27 of the second oblique orbit segment 25 to connect, the second oblique orbit segment 25
Inner side edge 26 connect with the outer side edges 27 of the adjacent first oblique orbit segment 17, and 25 length of the second oblique orbit segment be less than first
Oblique orbit segment 17, the part axle side expanded view of the track pipe 8 of this preferred version are as shown in Figure 4.
The track groove of the track pipe 8 of the present embodiment, can constrain the limit in the projection for being placed in sliding sleeve central tube 5 of embodiment 2
Position pin 7 does one-way movement along the axial direction of sliding sleeve 4.
Embodiment 5
The present embodiment on the basis of embodiment 1 ~ 4, as a kind of preferred embodiment, there is provided a kind of comprising above-mentioned
Sliding sleeve, sliding sleeve central tube with reducing district, the diameter changing mechanism of track pipe, including sleeve pipe 2, are set with described sleeve pipe 2 and have
Reducing district sliding sleeve 4,4 body of the sliding sleeve are provided with annular protrusion towards in upstream end port；The protuberance is along sliding sleeve sheet
The end for extending axially inwardly of body 4, it is annular expanding area 15 to the outside depression in 4 footpath of sliding sleeve body, the annular expanding area 15
Inner surface be arc-shaped concave or arc sphere；
Sliding sleeve central tube 5 is also arranged with the sliding sleeve 4, one is provided with the tube wall outer wall of the sliding sleeve central tube 5 convex
Block, is provided with a spacer pin 7 radially extended along tube wall on the projection lateral surface；5 upper end of sliding sleeve central tube is placed in the ring of sliding sleeve 4
In shape protuberance, its projection is close to 4 annular protrusion lower surface of sliding sleeve；
4 lower end of the sliding sleeve is also arranged with sleeve base 10, and the lower end end of sliding sleeve central tube 5 is placed in sleeve base 10, sliding
Cover formation cavity between 4 lower ends and sliding sleeve central tube 5；
Track pipe 8 is arranged with the cavity, is offered around the circumferential tortuous extension of body on the body of the track pipe 8
Track groove, the free end of spacer pin 7 are placed in the track groove of track pipe 8；
The track groove includes multiple axial track sections 16 up and down staggeredly parallel to body axial direction, adjacent axial rail
Mark section is connected by the first oblique orbit segment 17；
The inner side edge 26 of the first adjacent oblique orbit segment 17 connects so as to constituting " V " zag trajectory groove section, and each first
Oblique orbit segment 17 is equal with the angle of body axis；
The plurality of axial track section 16 includes initial axial track section 18, end axial track section 20 and is placed in the starting
Axial direction orbit segment 19 in the middle of multiple between axial track section 18, end axial track section 20；
Initial axial track section 18 is along body axial direction linear extension, and its two side is parallel, and two sides are towards 8 end of track pipe
Portion side is connected by cylindrical segmental arc 21；The axial rail section 20 of middle axial direction orbit segment 19 and end includes and the first oblique orbit segment
The hypotenuse 22 of 17 side parallel docking and the straight flange 23 axially in parallel with body, and the straight flange 23 closes on end axial track section
20 sides, straight flange 23 are connected by cylindrical segmental arc 21 with 22 connecting portion of hypotenuse；The straight flange 23 of the end axial direction rail section 20 and phase
27 connecting portion of outer side edges of adjacent first oblique orbit segment 17 is connected by cylindrical segmental arc 21；
The connecting portion of the inner side edge 26 of the first adjacent oblique orbit segment 17 is connected by inner circle segmental arc 24, the Inner arc
The center line of section 24 is not conllinear with the center line of each axial track section 16 and is partial to initial axial track section 18.
Positioned axially between 8 tube wall of the sliding sleeve central tube 5 and track pipe have spring 9.
Its structural representation is as shown in figure 5, the part axle side expanded view of its track pipe 8 is as shown in Figure 3.
As another kind preferably, in the present embodiment, the end axial track section of the track groove of track pipe 8 can also be, institute
State end axial track section 20 straight flange 23 parallel with the outer side edges 27 of the second oblique orbit segment 25 connect, the second oblique orbit segment
25 inner side edge 26 is connected with the outer side edges 27 of the adjacent first oblique orbit segment 17, and 25 length of the second oblique orbit segment is less than the
One oblique orbit segment 17, the part axle side expanded view of its track pipe 8 are as shown in Figure 4.
Diameter changing mechanism in the present embodiment, position-limitting pin 7 are constrained in the track groove of track pipe 8, are being applied first downwards again
During power upwards, the one-way movement vertically of position-limitting pin 7, track pipe 8 are rotated simultaneously.By the sliding sleeve 4 with reducing district,
Sliding sleeve central tube 5 is coordinated with the track groove on track pipe 8, can achieve the reciprocating motion of sliding sleeve central tube 5, the diameter changing mechanism
Number of diameter changing is determined that by the limit point number of the track groove of track pipe 8 i.e. 5 reciprocating number of times of sliding sleeve central tube is by track pad
Upper track groove determines.
Embodiment 6
The present embodiment is also arranged with change in the annular protrusion of the sliding sleeve 4 on the basis of the diameter changing mechanism of embodiment 5
Footpath ball seat 3, the reducing ball seat 3 are located at 4 annular protrusion upper end end of sliding sleeve.
In the present embodiment, the reducing ball seat 3 is " C " global seat or point lobe slips ball seat.
The reducing ball seat 3 of the diameter changing mechanism of the present embodiment is located in the undergauge area 14 of sliding sleeve 4, when reducing ball seat 3 is moved to
When in the expanding area 15 of sliding sleeve 4, reducing ball seat 3 realizes reducing in expanding area's intramedullary expansion.
Embodiment 7
When diameter changing mechanism in embodiment 1,5 or 6 is used for sliding sleeve of bushing, its structural representation is as shown in Figure 6.Including above connecing
1,1 lower end of top connection is connected with sleeve pipe 2, and 2 lower end of described sleeve pipe is connected with lower contact 12, opens on 2 upper end tube wall of described sleeve pipe
Fluid hole is provided with, also includes that reducing ball seat and its controlling organization, the reducing ball seat close to 1 lower surface of top connection and are set in cunning
In set 4；The controlling organization includes sliding sleeve 4, sliding sleeve central tube 5, shear pin 6, position-limitting pin 7, track pipe 8 and spring 9；
The sliding sleeve 4 close to 1 lower end of top connection and is sleeved in sleeve pipe 2, is equipped with first and cuts between sliding sleeve 4 and sleeve pipe 2
Nail 6, first shear pin 6 are located at the fluid hole lower end of sleeve pipe 2；4 body of sliding sleeve towards upstream end port described in the sliding sleeve 4
Annular protrusion is inside provided with；The protuberance along the end for extending axially inwardly of sliding sleeve body 4, be to sliding sleeve body 4 radially
The annular expanding area 15 of outer depression, the inner surface in the annular expanding area 15 is arc-shaped concave or arc sphere；
Sliding sleeve central tube 5 is also arranged with the sliding sleeve 4, one is provided with the tube wall outer wall of the sliding sleeve central tube 5 convex
Block, is provided with a spacer pin 7 radially extended along tube wall on the projection lateral surface；5 upper end of sliding sleeve central tube is placed in the ring of sliding sleeve 4
In shape protuberance, its projection is close to 4 annular protrusion lower surface of sliding sleeve；
4 lower end of the sliding sleeve is also arranged with sleeve base 10, and the lower end end of sliding sleeve central tube 5 is placed in sleeve base 10, sliding
Cover formation cavity between 4 lower ends and sliding sleeve central tube 5；
Track pipe 8 is also arranged with the cavity, tortuous extension circumferential around body on the body of the track pipe 8, is offered
Track groove, the free end of spacer pin 7 is placed in the track groove of track pipe 8；
The track groove includes multiple axial track sections 16 up and down staggeredly parallel to body axial direction, adjacent axial rail
Mark section is connected by the first oblique orbit segment 17；
The inner side edge 26 of the first adjacent oblique orbit segment 17 connects so as to constituting " V " zag trajectory groove section, and each first
Oblique orbit segment 17 is equal with the angle of body axis；
The plurality of axial track section 16 includes initial axial track section 18, end axial track section 20 and is placed in the starting
Axial direction orbit segment 19 in the middle of multiple between axial track section 18, end axial track section 20；
Initial axial track section 18 is along body axial direction linear extension, and its two side is parallel, and two sides are towards 8 end of track pipe
Portion side is connected by cylindrical segmental arc 21；The axial rail section 20 of middle axial direction orbit segment 19 and end includes and the first oblique orbit segment
The hypotenuse 22 of 17 side parallel docking and the straight flange 23 axially in parallel with body, and the straight flange 23 closes on end axial track section
20 sides, straight flange 23 are connected by cylindrical segmental arc 21 with 22 connecting portion of hypotenuse；The straight flange 23 of the end axial direction rail section 20 and phase
27 connecting portion of outer side edges of adjacent first oblique orbit segment 17 is connected by cylindrical segmental arc 21；
The connecting portion of the inner side edge 26 of the first adjacent oblique orbit segment 17 is connected by inner circle segmental arc 24, the Inner arc
The center line of section 24 is not conllinear with the center line of each axial track section 16 and is partial to initial axial track section 18.The track groove includes many
The individual axial track section up and down staggeredly parallel to body axial direction, adjacent axial track section are connected by the first oblique orbit segment
Logical；The inner side edge of the first adjacent oblique orbit segment connects so as to constituting " V " zag trajectory groove section, and each first oblique orbit segment
Equal with the angle of body axis.
Positioned axially between 8 tube wall of the sliding sleeve central tube 5 and track pipe have spring 9.
10 end of the sleeve base is also equipped with the second shear pin 11 with 5 end of sliding sleeve central tube.
Second shear pin 11 is used for preventing and treating without spherical state low sleeve slide downward.
The diameter changing mechanism of embodiment 1,5 or 6 is applied to sleeve pipe cunning by sliding sleeve of bushing of the present embodiment for small diameter borehole
In set, devising a kind of " opening a ball " formula sliding sleeve switch, this sliding sleeve switch indoor design has " meeting ball to pass through " mechanism, meets ball and lead to more
The number of times that crosses can be preset, and the chance ball number of pass times respectively 0,1,2,3 ... of the sliding sleeve switch in same tubing string from bottom to top is secondary,
When sliding sleeve switch meets ball number of pass times is 0, you can open sliding sleeve is switched.This sliding sleeve switch is multiple by being thrown in from well head successively
A kind of ball of specification, realizes opening multiple underground sliding bush switchings from bottom to top step by step, and then realizes being layered from bottom to top successively pressing
Split construction.
Embodiment 8
The sliding sleeve switch of embodiment 7, its concrete operating principle is：As shown in fig. 7, steel ball 13 contracts with diameter greater than sliding sleeve 4
14 diameter of footpath area and 15 diameter of expanding area is less than, reducing ball seat 3 is sheathed in the undergauge area 14 of sliding sleeve 4, and sliding sleeve 4 is to reducing ball seat
3 apply radial constraint, prevent reducing ball seat 3 from radial dilatation, while reducing ball seat 3 stores the elastic potential energy of radial dilatation.
When steel ball 13 is seated on reducing ball seat 3, when applying certain pressure, steel ball 13, reducing ball seat 3 are in company with sliding sleeve central tube 5 one
Act the expanding position of internal diameter for coming downwards to sliding sleeve 4, the i.e. expanding area 15 of 14 end of undergauge area, this section of stroke is steel ball 13 by row
Journey, is labeled as LPass through, i.e. LPass throughDistance for the porch in the expanding area 14 of ball seat to sliding sleeve 4.As shown in Figure 8, reducing ball seat 3
After losing the radial constraint of sliding sleeve 4, radial dilatation under the elastic potential energy effect of itself, 3 internal diameter of reducing ball seat become big and cause
Steel ball 13 enters following tool string by reducing ball seat 3, now steel ball 13 by sliding sleeve switch.When steel ball 13 passes through reducing ball
After seat 3, in the presence of spring 9, reducing ball seat 3 and sliding sleeve central tube 5 is caused to go upward to initial position, reducing ball seat 3 is closed again
Close the internal diameter for recovering original.
Embodiment 9
The sliding sleeve switch of embodiment 7, the sliding sleeve switch are designed with " meet ball pass through " controlling organization, and below in conjunction with the accompanying drawings 3,4
And 6 be illustrated.The distance that reducing ball seat 3 is moved axially in sliding sleeve 4 by pin 7 in track pipe 8 axial displacement and
Fixed.As shown in Figure 6, pin 7 passes through the track groove of track pipe 8, and is fixed in the hole of sliding sleeve central tube 5, i.e. the one of pin 7
End is positioned in the track groove of track pipe 8, and as shown in Figure 3, Figure 4, the other end is fixed on the aperture of sliding sleeve central tube 5 to track groove
In.Pin 7 with sliding sleeve central tube 5 axial movement and movement, pin 7 moved in the track groove of track pipe 8, track pipe 8
Can be with axial rotation.The steel ball quantity that sliding sleeve switch can pass through determined by the limit point number of the track groove of track pipe 8, specific number
As needed depending on the series of pressure break, while the number of 8 limit point of track pipe is limited by 2 external diameter of sleeve pipe.
In the present embodiment, so that three-level sliding sleeve opened by a ball as an example, A, B, C, D, E, F etc. is distributed with shown track groove multiple
Limit point.Assume the C point of the initial position in track groove of pin 7, as shown in figure 11, steel ball 13 is seated on reducing 3, in pressure
In the presence of, reducing ball seat 3 drives sliding sleeve central tube 5 to move down, and sliding sleeve central tube 5 drives pin 7 to move in track groove,
D points are moved to by C points.Now from top connection 1, track pipe 8 is to rotate counterclockwise.Produced axially by C → D points by pin 7
Stroke L1, and L1=LPass through（LPass throughDistance for the porch in the expanding area 15 of reducing ball seat 3 to sliding sleeve 4）, as shown in Figure 3.I.e.
, from C → D points, the expanding area 15 that reducing ball seat 3 enters sliding sleeve 4 is expanding for pin 7, and ball can be made to pass through sliding sleeve switch.
When steel ball 13 is after sliding sleeve switch, under the elastic potential energy effect of spring 9, the promotion sliding sleeve of spring 9 central tube 5,
Reducing ball seat 3 and pin 7 reset, and pin 7 is when resetting by D → E points.Now from top connection 1, track pipe 8 is suitable
Hour hands are rotated.When pin 7 is in E points, axial stroke L2 can be produced by E → F points.Due to L2<LPass through, now reducing ball seat 3 cannot
Reach the expanding area 15 of sliding sleeve 4, it is impossible to which radial dilatation, steel ball 13 can not pass through sliding sleeve switch.
Embodiment 10
The sliding sleeve switch of embodiment 7, it is possible to achieve the steel ball 13 of the multiple same specifications of throwing is opened multiple from bottom to top step by step
The sliding sleeve switch of same specification（The sliding sleeve switch of same specification refers to that the physical dimension of ball seat is the same）.Base in embodiment 1 ~ 9
On plinth, it is illustrated by conjunction with sliding sleeve of bushing example, carries out by taking the sliding sleeve switch that 3 same specifications opened by the ball of a specification as an example
Illustrate, the schematic diagram that pin 7 is moved in track pipe 8 when pipeline is opened step by step is as shown in Figure 10,11,12.
In down-hole string, the sliding sleeve switch of same specification is respectively labeled as I grade, II grade and III grade from bottom to top, such as Fig. 9
Shown.The initial position of the pin 7 of I grade, the II grade and III grade sliding sleeve switch in down-hole is arranged on E, C, A point, such as Figure 10,11,12
Shown.
When first steel ball 14 is thrown from well head：Steel ball 14 is arrived first on 3 ball seat of reducing of III grade of sliding sleeve switch, pressurization
Steel ball 13 passes through III grade of sliding sleeve switch, while the pin 7 of III grade of sliding sleeve switch is by A → B → C points；Then steel ball 13 reaches II grade
The reducing ball seat 3 of sliding sleeve switch, pressurization steel ball 13 pass through II grade of sliding sleeve switch, while the pin 7 of II grade of sliding sleeve switch is by C → D
→E；Drop down onto under steel ball 13 on the reducing ball seat of I grade of sliding sleeve switch, during pressurization, pin can only be by E → F, due to the axial row of pin
Journey is less than needed for steel ball 13, by stroke, steel ball 13 can not be continued pressurization, cut off shear pin 6, sliding sleeve by I grade of sliding sleeve switch
4th, sliding sleeve central tube 5, pin 7, track pipe 8, spring 9, sleeve base 10 fall to blocking the fluid hole of I grade of its lower end together, open
The fluid hole of sleeve pipe 2 is opened, I grade of sliding sleeve switch is opened.
When second steel ball 13 is thrown from well head：Steel ball 13 is arrived first on the reducing ball seat 3 of III grade of sliding sleeve switch, pressurization
Steel ball 13 passes through III grade of sliding sleeve switch, while the pin 7 of III grade of sliding sleeve switch is by C → D → E points；Then II steel ball 13 reaches II
The reducing ball seat 3 of level sliding sleeve switch, pressurization, pin can only be by E → F, as the axial stroke of pin is less than needed for steel ball 13
By stroke, steel ball 13 can not be continued pressurization, cut off shear pin 6, sliding sleeve 4, sliding sleeve central tube 5, pin by II grade of sliding sleeve switch
7th, track pipe 8, spring 9, sleeve base 10 together fall closure II grade of its lower end fluid hole, open sleeve pipe 2 fluid hole, II
Level sliding sleeve switch is opened.
When the 3rd steel ball 13 is thrown from well head：Steel ball 13 is arrived first on the reducing ball seat 3 of III grade of sliding sleeve switch, pressurization,
Pin can only be by E → F, as the axial stroke of pin is less than needed for steel ball 13, by stroke, steel ball 13 can not pass through III grade
Sliding sleeve switch, continues pressurization, cuts off shear pin 6, sliding sleeve 4, sliding sleeve central tube 5, pin 7, track pipe 8, spring 9, sleeve base 10 1
Act the fluid hole of III grade of its lower end of closure, open the fluid hole of sleeve pipe 2, III grade of sliding sleeve switch is opened；Now can be right
The corresponding interval of the sliding sleeve switch carries out pressing crack construction.
The present embodiment solves 3.5 inches of sleeve pipes that current well completion of casing sliding sleeve is used, limited by inside/outside diameter size larger,
For the sliding sleeve of bushing of reducing pitching, can only at most connect two-stage and transform 3 layers, it is difficult to adapt to the technical problem of the exploitation of many series of strata,
By throwing in a kind of ball of multiple specifications from well head successively, realize opening multiple underground sliding bush switchings from bottom to top step by step, and then
Realize being layered successively pressing crack construction from bottom to top.
The part and structure that above example is not described in detail belongs to the well-known components of the industry and common structure or normal
With means, do not describe one by one here.
Above example is only unrestricted in order to technical scheme to be described, although with reference to preferred embodiment to this
Bright in addition described in detail, it will be understood by those within the art that, technical scheme can be repaiied
Change or equivalent, without deviating from the objective and scope of technical solution of the present invention, which all should be covered will in right of the invention
Ask in the middle of scope.
Claims (5)
1. a kind of diameter changing mechanism, including sleeve pipe（2）, it is characterised in that：Described sleeve pipe（2）Inside it is set with reducing district sliding sleeve
（4）, the sliding sleeve（4）Sliding sleeve central tube is inside also arranged with（5）, the sliding sleeve central tube（5）On be provided with one along tube wall radially
The position-limitting pin of extension（7）；Sliding sleeve central tube（5）Upper end is placed in sliding sleeve（4）Reducing district in；The sliding sleeve（4）Lower end also covers
It is provided with sleeve base（10）, sliding sleeve central tube（5）Lower end end be placed in sleeve base（10）Interior, sliding sleeve（4）Lower end and sliding sleeve center
Pipe（5）Between formed cavity；Track pipe is arranged with the cavity（8）, the track pipe（8）Body on offer around body
The circumferential tortuous track groove for extending, position-limitting pin（7）Free end be placed in track pipe（8）Track groove in；The sliding sleeve center
Pipe（5）Manage with track（8）Positioned axially between tube wall have spring（9）；The sliding sleeve with reducing district（4）Including sliding sleeve
（4）Body, the sliding sleeve（4）Annular protrusion is provided with the upstream end port of body；The protuberance is along sliding sleeve（4）Body
The end for extending axially inwardly is to sliding sleeve（4）The annular expanding area that body footpath is outwards recessed（15）, the annular expanding area（15）
Inner surface be arc-shaped concave or arc sphere；The sliding sleeve central tube（5）Tube wall outer wall on be provided with a projection, the projection
A position-limitting pin radially extended along tube wall is provided with lateral surface（7）；The track pipe（8）Body on offer around body
The circumferential tortuous track groove for extending, the track groove include multiple axial track sections up and down staggeredly parallel to body axial direction
（16）, adjacent axial track section is by the first oblique orbit segment（17）Connection；The first adjacent oblique orbit segment（17）Interior
Side（26）Connect so as to constituting " V " zag trajectory groove section, and each first oblique orbit segment（17）Angle phase with body axis
Deng；The plurality of axial track section（16）Including initial axial track section（18）, end axial track section（20）Be placed in this
Beginning axial track section（18）, end axial track section（20）Between multiple in the middle of axial direction orbit segment（19）；Initial axial track
Section（18）Along body axial direction linear extension, and its two side is parallel, and two sides are managed towards track（8）End side passes through external arc
Section（21）Connection；Middle axial direction orbit segment（19）And end axial track section（20）Including with the first oblique orbit segment（17）Side
The hypotenuse of side parallel docking（22）And the straight flange axially in parallel with body（23）, and the straight flange（23）Close on end axial track section
（20）Side, straight flange（23）With hypotenuse（22）Connecting portion is by cylindrical segmental arc（21）Connection；The end axial track section（20）
Straight flange（23）With the adjacent first oblique orbit segment（17）Outer side edges（27）Connecting portion is by cylindrical segmental arc（21）Connection；Adjacent
The first oblique orbit segment（17）Inner side edge（26）Connecting portion pass through inner circle segmental arc（24）Connection, the inner circle segmental arc（24）
Center line and each axial track section（16）Center line conllinear and be partial to initial axial track section（18）.
2. a kind of diameter changing mechanism as described in claim 1, it is characterised in that：The end axial track section（20）Straight flange
（23）With the second oblique orbit segment（25）Outer side edges（27）Parallel connect, the second oblique orbit segment（25）Inner side edge（26）With
Adjacent first oblique orbit segment（17）Outer side edges（27）Connect, and the second oblique orbit segment（25）Length is less than the first oblique rail
Mark section（17）.
3. the diameter changing mechanism as described in claim 1, it is characterised in that：The sliding sleeve（4）Annular protrusion in be also arranged with
Reducing ball seat（3）, the reducing ball seat（3）It is located at sliding sleeve（4）Annular protrusion upper end end.
4. the diameter changing mechanism as described in claim 3, it is characterised in that：The reducing ball seat（3）For " C " global seat.
5. the diameter changing mechanism as described in claim 3, it is characterised in that：The reducing ball seat（3）For a point lobe slips ball seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410463178.XA CN104234683B (en) | 2014-09-12 | 2014-09-12 | A kind of diameter changing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410463178.XA CN104234683B (en) | 2014-09-12 | 2014-09-12 | A kind of diameter changing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104234683A CN104234683A (en) | 2014-12-24 |
| CN104234683B true CN104234683B (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410463178.XA Expired - Fee Related CN104234683B (en) | 2014-09-12 | 2014-09-12 | A kind of diameter changing mechanism |
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| CN (1) | CN104234683B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150467B (en) * | 2015-04-08 | 2018-09-18 | 中国石油化工股份有限公司 | For the fracturing device in tubing string |
| CN108729895B (en) * | 2017-04-18 | 2020-10-09 | 中国石油天然气股份有限公司 | Multistage fracturing tool of sleeve pipe ball seat |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2898283Y (en) * | 2006-04-26 | 2007-05-09 | 中国石油天然气股份有限公司 | Buffer sliding sleeve switch |
| US20090308588A1 (en) * | 2008-06-16 | 2009-12-17 | Halliburton Energy Services, Inc. | Method and Apparatus for Exposing a Servicing Apparatus to Multiple Formation Zones |
| US8356671B2 (en) * | 2010-06-29 | 2013-01-22 | Baker Hughes Incorporated | Tool with multi-size ball seat having segmented arcuate ball support member |
| EP2625377A4 (en) * | 2010-08-31 | 2017-09-20 | Services Pétroliers Schlumberger | Methods for completing multi-zone production wells using sliding sleeve valve assembly |
| WO2012118889A2 (en) * | 2011-03-02 | 2012-09-07 | Team Oil Tools, Lp | Multi-actuating seat and drop element |
| US8770299B2 (en) * | 2011-04-19 | 2014-07-08 | Baker Hughes Incorporated | Tubular actuating system and method |
| CN202338279U (en) * | 2011-10-17 | 2012-07-18 | 中国石油天然气股份有限公司 | Variable-diameter fracturing valve |
| US9353598B2 (en) * | 2012-05-09 | 2016-05-31 | Utex Industries, Inc. | Seat assembly with counter for isolating fracture zones in a well |
| CN102704904B (en) * | 2012-05-24 | 2015-03-04 | 中国海洋石油总公司 | Multi-stage fracturing sliding sleeve device and using method thereof |
| CN203403872U (en) * | 2013-07-19 | 2014-01-22 | 中国石油集团长城钻探工程有限公司 | Multistage fracturing well completion sliding sleeve device |
| CN103967467B (en) * | 2014-05-23 | 2016-08-10 | 湖南唯科拓石油科技服务有限公司 | Counting assembly and multistage full-bore pitching sliding bush apparatus |
| CN204082118U (en) * | 2014-09-12 | 2015-01-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of diameter changing mechanism |
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2014
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| CN104234683A (en) | 2014-12-24 |
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Effective date of registration: 20201027 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1207 Patentee before: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING COMPANY LIMITED CHANGQING DOWNHOLE TECHNOLOGY Co. |
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