CN104405338B - Sleeve fracturing ball seat - Google Patents
Sleeve fracturing ball seat Download PDFInfo
- Publication number
- CN104405338B CN104405338B CN201410711276.0A CN201410711276A CN104405338B CN 104405338 B CN104405338 B CN 104405338B CN 201410711276 A CN201410711276 A CN 201410711276A CN 104405338 B CN104405338 B CN 104405338B
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- Prior art keywords
- ball seat
- epivalve
- hypovalve
- cross
- rib
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- 239000000203 mixture Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 15
- 238000007789 sealing Methods 0.000 description 5
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010010214 Compression fracture Diseases 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 210000004247 hand Anatomy 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention belongs to the technical field of oilfield fracturing underground tools and provides a sleeve fracturing ball seat. The sleeve fracturing ball seat comprises two upper petals, two lower petals, a base, a pressing cap, a cross and a snap spring, wherein the two upper petals and the two lower petals are distributed circumferentially and alternately to form a circular cone cylinder shape which is large in top and small in bottom; the two upper pedals are distributed symmetrically at 180 degrees, and so are the two lower pedals; the base is connected with the lower ends of the upper petals and the lower petals; the cross is arranged in the circular cone cylinder composed of the upper petals and the lower petals. According to the sleeve fracturing ball seat, the pattern that a ball seat needs to be arranged in advance underground for sleeve and sliding sleeve tools, and instead, the pattern that the ball seat is dropped down in the later period and formed by use of a special tool is adopted, and therefore, the unreliability of the ball seat which is formed by use of rubber seal for the sleeve and sliding sleeve tools is reduced.
Description
Technical field
The invention belongs to oil field compression fracture downhole tool technical field is and in particular to a kind of casing fracturing ball seat, it is a kind of set
It is used for the ball seat of Inter-zonal packing it is adaptable to Oil/gas Well light sleeve pipe huge discharge volume fracturing during pipe well pressure break.
Background technology
Conventional multilamellar multistage pressure break at present, interlayer（Intersegmental）Packing mainly adopts packer or bridging plug, needs after pressure break
The full-bore salvaged packer or just enable pit shaft after boring mill bridging plug, keeps pit shaft unimpeded, in order to later stage underground work.
The sliding sleeve of bushing fracturing tool occurring in recent years, mainly by being preset at pressure break ball seat in down-hole casing, tool
Body is divided into two kinds：One is limited level pressure break ball seat, and ball seat internal diameter becomes larger from top to bottom, and pitching size also increases step by step, only
Enable the pressure break of finite progression；Another kind is infinite stages pressure break ball seat, forms ball seat after activating by certain mode during pressure break,
Put into the ball of same size every time, can achieve the pressure break not limiting series, but field test shows due to rubber in high temperature and high pressure environment
Long-time the unstable of sealing of glue leads to infinite stages pressure break ball seat reliability relatively low, and the probability that ball seat forms failure is larger.
As Chinese patent notification number CN202338315U, there is provided one kind can reducing sliding sleeve of bushing, do not limit for cased well
Hop count pressure break.There is a fracturing sliding bush in the lower end inner wall of top connection, top connection is fixed by pin with fracturing sliding bush；Connect upper
The sandblasting hole of radial direction is had on centriciput wall；There is the liquid outlet of an axial direction top connection upper end；Top connection lower end connects lower contact；Pressure
Split sliding sleeve lower end and connect a columnar C-shaped ring support cylinder；The lower end larger-diameter section of C-shaped ring sliding sleeve is in C-shaped ring support cylinder；?
There is a C-shaped ring on the ring-shaped step of C-shaped ring support cylinder lower end；There is shaft orientation liquid feeding hole in the lower end of lower contact；The upper end of inlet opening
Mouthful on lower contact inwall and one radial hole of inlet opening upper port and C-shaped ring support cylinder is relative and connect, C-shaped ring support barrel dliameter to
The position in hole is on the top of C-shaped ring sliding sleeve annular step upper surface.Effect is：Because becoming the annulus machine of closing using C-shaped ring
Structure, so that fracturing sliding bush opened by the steel ball that can put into same diameter every time, is no longer increased step by step by steel ball and is limited.
Content of the invention
The purpose of the present invention is to overcome long-time the unstable of sealing of rubber in prior art high temperature environment under high pressure to lead to
Infinite stages pressure break ball seat reliability is relatively low, and ball seat forms the larger problem of probability of failure.
For this reason, the invention provides a kind of casing fracturing ball seat, including two epivalves, two hypovalves, base, pressure cap, ten
Cabinet frame, jump ring；Two epivalves and two hypovalves are circumferentially alternately distributed a up big and down small conical cylindrical shape of composition, on two
Lobe is symmetrical in 180 °, and two hypovalves are symmetrical in 180 °, and base is connected with the lower end of epivalve and hypovalve；
Described epivalve inwall protrudes a rib from top to bottom, has a circular anchor hole in the middle of rib, and anchor hole is left
Respectively there are semi-circular recesses right both sides, have a circular arc boss in the middle part of the arc length of epivalve bottom, and circular arc boss bottom is on one
Little lower big two-stage cylinder, cylinder bottom is in cone；
Described hypovalve inwall protrudes a rib from top to bottom, and rib both sides have the rectangle of a up/down perforation respectively
Groove, has a two-stage arc section boss in the middle part of the arc length of hypovalve bottom；
Described base is thick cyclinder body, symmetrical four grooves in upper end, and two of which is up big and down small trapezoidal recessed
Groove, two trapezoidal grooves are symmetrical in 180 °, and two other is the two-stage rectangular recess symmetrical in 180 °, described base
Interior lower end sets " cross " rib, and " cross " rib center is provided with a circular hole, under described rectangular recess and hypovalve
The two-stage arc section boss in portion is fixed, and a circular hole is arranged at described trapezoidal groove bottom, and described jump ring is fixed on by pressure cap
In circular hole, described epivalve lower cylindrical is fixed with base by jump ring；
Described cross is arranged in epivalve and the taper cone barrel of hypovalve composition, and the centre of described cross is circular hole, circular hole
Surrounding stretches out four arms, and the rib one of described two epivalves and the rib two of two hypovalves are connected with four arms of cross respectively
Connect, the circular hole coaxial at the middle circular hole of described cross and chassis interior " cross " rib center.
Above-mentioned epivalve top arc length is the 3/10 of taper cone barrel top overall circumference, and epivalve bottom arc length is that taper cone barrel bottom is always all
Long 1/5.
Above-mentioned epivalve upper inner is a conical inclined surface, and the circular arc boss arc length of epivalve bottom accounts for epivalve lower end arc length
1/3.
Above-mentioned epivalve inwall is provided with two threaded pin through holes, is distributed in rib one left and right sides of epivalve.
Above-mentioned hypovalve top arc length is the 1/5 of taper cone barrel top overall circumference, and hypovalve bottom arc length is that taper cone barrel bottom is always all
Long 3/10.
Above-mentioned hypovalve upper inner is a conical inclined surface, and the two-stage arc section boss of hypovalve bottom is up-small and down-big,
Convex platform arc length accounts for the 1/6 of hypovalve lower end arc length, and lower convex platform arc length accounts for the 1/3 of hypovalve lower end arc length.
Above-mentioned epivalve is connected by anchor with cross 7, and hypovalve is connected by keyway mode with cross.
Symmetrical two manholes in above-mentioned chassis outer side face, this manhole axis is counterclockwise with trapezoidal groove axis
In 45 °.
The circular hole outside wall surface at above-mentioned chassis interior " cross " rib center has two tapped through holes, this tapped through hole and bottom
Manhole on seat is coaxial.
Above-mentioned epivalve, hypovalve, base, pressure cap, cross and jump ring are all formed using dissolvable metal material processing.
Beneficial effects of the present invention：
(1) present invention can achieve sleeve pipe infusion, do not limit the huge discharge volume fracturing of series.
(2) present invention, using can dissolve metal material processing casing fracturing of the present invention ball seat, coordinates solvable ball, complete after pressure break
CL, maintains the big orifice of pit shaft, is conducive to later stage workover treatment.
(3), compared with packer or bridging plug, casing fracturing ball seat frame for movement of the present invention is simply it is not necessary to salvage for the present invention
Packer or brill mill bridging plug operation can achieve pit shaft full-bore.
(4) present invention does not have rubber seal etc., all using metal sealing, reliability in the high temperature and high pressure environment of down-hole
High.
(5) present invention changes the mode in the preset ball seat in down-hole for the sliding sleeve of bushing class instrument needs, using goal under the later stage
Seat the mode using specific purpose tool formation ball seat, reduce sliding sleeve of bushing class instrument and rely on rubber seal to form ball seat not
Reliability.
Below with reference to accompanying drawing, the present invention is described in further details.
Brief description
Fig. 1 is casing fracturing ball seat forward direction schematic diagram of the present invention.
Fig. 2 is casing fracturing ball seat left view schematic diagram of the present invention.
Fig. 3 is that casing fracturing ball seat of the present invention is right regards schematic diagram.
Fig. 4 is casing fracturing ball seat schematic top plan view of the present invention.
Fig. 5 is casing fracturing ball seat forward direction half-section diagram of the present invention.
Fig. 6 is that half-section diagram overlooked by casing fracturing ball seat of the present invention.
Fig. 7 is casing fracturing ball seat epivalve schematic diagram of the present invention.
Fig. 8 is casing fracturing ball seat hypovalve schematic diagram of the present invention.
Fig. 9 is casing fracturing ball seat cross schematic diagram of the present invention.
Figure 10 is casing fracturing ball seat base schematic diagram of the present invention.
Figure 11 is casing fracturing ball seat center-pole schematic diagram of the present invention.
Figure 12 is casing fracturing ball seat bracing frame schematic diagram of the present invention.
Figure 13 is casing fracturing ball seat assembly structure diagram of the present invention.
Figure 14 is Figure 13 along A-A directional profile schematic diagram.
Half-section diagram is faced when Figure 15 goes into the well for casing fracturing ball seat of the present invention.
Vertical view half-section diagram when Figure 16 goes into the well for casing fracturing ball seat of the present invention.
Description of reference numerals：1st, epivalve；2nd, hypovalve；3rd, base；4th, epivalve pin；5th, pressure cap；6th, hypovalve pin；7th, cross
Frame；8th, anchor；9th, jump ring；10th, center-pole；11st, bracing frame；12nd, base pin；13rd, middle pin；14th, rib one；15th, cut with scissors
Nail；16th, semi-circular recesses；17th, circular arc boss；18th, cylinder；21st, rib two；22nd, rectangular recess；23rd, two-stage arc section
Boss；31st, trapezoidal groove；32nd, manhole；33rd, rectangular recess；34th, tapped through hole；35th, circular hole.
Specific embodiment
Embodiment 1：
In order to overcome long-time the unstable of sealing of rubber in prior art high temperature environment under high pressure to lead to infinite stages pressure break
Ball seat reliability is relatively low, and ball seat forms the larger problem of probability of failure, present embodiments provide one kind as shown in Figure 1, Figure 2, Fig. 3,
Casing fracturing ball seat shown in Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, including 1, two hypovalves 2 of two epivalves, base 3,
Pressure cap 5, cross 7, jump ring 9；Two epivalves 1 and two hypovalves 2 are circumferentially alternately distributed a up big and down small circular cone of composition
Barrel shape, two epivalves 1 be in 180 ° symmetrical, two hypovalves 2 be in 180 ° symmetrical, base 3 and epivalve 1 and hypovalve 2
Lower end connects；
Described epivalve 1 inwall protrudes a rib 1 from top to bottom, has a circular anchor hole in the middle of rib 1
15, each side there are semi-circular recesses 16 in anchor hole 15, has a circular arc boss 17 in the middle part of epivalve 1 bottom arc length, circle
Arc boss 17 bottom is a up-small and down-big two-stage cylinder 18, and cylinder 18 bottom is in cone；
Described hypovalve 2 inwall protrudes a rib 2 21 from top to bottom, and rib 2 21 both sides have about one to pass through respectively
Logical rectangular recess 22, has a two-stage arc section boss 23 in the middle part of hypovalve 2 bottom arc length；
Described base 3 is thick cyclinder body, symmetrical four grooves in upper end, and two of which is up big and down small trapezoidal recessed
Groove 31, two trapezoidal grooves 31 are symmetrical in 180 °, and two other is the two-stage rectangular recess 33 symmetrical in 180 °, institute
State base 3 interior lower end and set " cross " rib, " cross " rib center is provided with a circular hole, described rectangular recess 33
It is fixed with the two-stage arc section boss of hypovalve 2 bottom, a circular hole 35, described jump ring 9 are arranged at described trapezoidal groove 31 bottom
It is fixed in circular hole 35 by pressure cap 5, it is fixing with base 3 that described epivalve 1 lower cylindrical passes through jump ring 9；
Described cross 7 is arranged in epivalve 1 and the taper cone barrel of hypovalve 2 composition, and the centre of described cross 7 is circular hole,
Circular hole surrounding stretches out four arms, the rib 1 of described two epivalves 1 and the rib 2 21 of two hypovalves 2 respectively with cross 7
Four arms connect, the circular hole coaxial at the circular hole in the middle of described cross 7 and internal " cross " the rib center of base 3.
As shown in Figure 2 and Figure 7, described epivalve 1 top arc length is the 3/10 of taper cone barrel top overall circumference, epivalve 1 bottom arc
The 1/5 of a length of taper cone barrel bottom overall circumference；Described epivalve 1 upper inner is a conical inclined surface, and the circular arc of epivalve 1 bottom is convex
Platform 17 arc length accounts for the 1/3 of epivalve 1 lower end arc length；Described epivalve 1 inwall is provided with two threaded pin through holes, is distributed in epivalve 1
Rib 1 left and right sides.
As shown in Figure 2 and Figure 8, described hypovalve 2 top arc length is the 1/5 of taper cone barrel top overall circumference, hypovalve 2 bottom arc length
For taper cone barrel bottom overall circumference 3/10；Described hypovalve 2 upper inner is a conical inclined surface, the two-stage circle of hypovalve 2 bottom
Segmental arc boss 23 is up-small and down-big, and convex platform arc length accounts for the 1/6 of hypovalve 2 lower end arc length, and lower convex platform arc length accounts for hypovalve 2 lower end arc length
1/3, hypovalve 2 inwall has two threaded pin through holes, is distributed in rib 2 21 both sides of hypovalve 2.
As shown in Figure 2 and Figure 9, described epivalve 1 is connected by anchor 8 with cross 7, and hypovalve 2 passes through keyway with cross 7
Mode connects.
As shown in Figure 10, symmetrical two manholes 32 of described base 3 lateral surface, this manhole 32 axis and ladder
Connected in star 31 axis is in 45 ° counterclockwise；The circular hole outside wall surface at described base 3 inside " cross " rib center has two screw threads to lead to
Hole 34, this tapped through hole 34 is coaxial with the manhole 32 on base 3, and tapped through hole 34 internal diameter is less than manhole 32 internal diameter.
As shown in Figure 3 and Figure 5, pressure cap 5 is the threaded cylinder of outer wall, and pressure cap 5 lower end is machined with " a word
Type " screwdriver groove, is a unthreaded hole inside pressure cap 5 epimere cylinder, and its internal diameter is more than epivalve 1 lower end cylinder 18, and pressure cap 5 leads to
Cross screw thread to be connected with the trapezoidal groove 31 bottom thread hole of base 3, for fixed circlip 9, described jump ring 9 is " C-shaped ".
In addition, described epivalve 1, hypovalve 2, base 3, pressure cap 5, cross 7 and jump ring 9 are all added using dissolvable metal material
Work forms, and coordinates solvable ball, is completely dissolved, maintains the big orifice of pit shaft, be conducive to later stage workover treatment after pressure break.
Casing fracturing ball seat frame for movement of the present invention is simple it is not necessary to salvaging packer or brill mill bridging plug operation can achieve
Pit shaft full-bore, achievable sleeve pipe infusion, does not limit the huge discharge volume fracturing of series, meanwhile, does not have rubber seal etc., all
Using metal sealing, in the high temperature and high pressure environment of down-hole, reliability is high.
Embodiment 2：
On the basis of embodiment 1, casing fracturing ball seat of the present invention is entered by under specific purpose tool when going into the well, specific purpose tool by
Support 11, center-pole 10, middle pin 13 form, and as shown in Figure 11, Figure 12 and Figure 13, bracing frame 11 has one for an outer wall
The thick cylinder of step, bracing frame 11 epimere external diameter is big, and hypomere external diameter is little, by taper seat transition, cone angle between epimere and hypomere
Identical with the conical inclined surface cone angle of ball seat epivalve 1, bracing frame 11 bottom is a taper seat；Center in bracing frame 11 epimere
Hole is little, and in lower end, centre bore is big；Four wing grooves are distributed on bracing frame 11 hypomere cylindrical wall, circumference is in 90 degree of PHASE DISTRIBUTION, wing groove
Wide mate with cross 7 arm width.Center-pole 10 is a solid cylinder, and center-pole 10 the top is external screw thread, center-pole 10
Centre is a cylindrical step, and the following 180 degree of cylindrical step is symmetrically distributed with two internal thread pin nail, for fixing
Middle pin 13, center-pole 10 bottom 180 degree is symmetrically distributed with two internal thread pin nail.
As shown in Figure 13, Figure 14, the assembling process of the present invention is as follows：When going into the well, two epivalves 1 of casing fracturing ball seat are right
Claim to connect with two arm anchors 8 of cross 7, be enclosed between the wing groove on bracing frame 11 hypomere cylindrical wall, use epivalve pin
Two epivalves 1 are fixed on the both wings of bracing frame 11 threaded pin through hole on nail 4 and epivalve 1 inwall；Casing fracturing ball seat
Two hypovalves 2 be symmetrically mounted on the rectangle in the hole of base 3, then base 3 is enclosed within bracing frame 11 lower end, by two hypovalves 2
Be fixed on the other both wings of bracing frame 11 with the threaded pin through hole on hypovalve pin 6 and hypovalve 2 inwall, epivalve 1 upper, under
Lobe 2 under；Center-pole 10 is passed through the circle of bracing frame 11, the circular hole of cross 7 and internal " cross " the rib center of base 3
Use between hole, and base 3 that base pin 12 is fixing, the maximum outside diameter after assembling is 110mm, be respectively bracing frame 11 upper end and
Base 3.
As shown in Figure 13, Figure 15 and Figure 16, the work process of the present invention is as follows：
First, when reaching the predetermined forming position of ball seat, setting tool promotes bracing frame 11 upper surface descending so that hypovalve 2
After cutting off with the fixing pin 6 of bracing frame 11, the taper seat of bracing frame 11 lower end promotes two hypovalves 2 to expand outwardly so as to edge
It is radially expanded to final external diameter.
Then, continue to press on that bracing frame 11 is descending, lasting descending with bracing frame 11 and epivalve 1, when reaching center-pole
During 10 middle pin 13, cross 7 and epivalve 1 are hampered, and time-out moves down, and bracing frame 11 upper surface continues to lower thrust, support
The upper conical surface of frame 11 forces the epivalve pin 4 between epivalve 1 and bracing frame 11 to be cut off, and then epivalve 1 is with the anchor 8 of cross 7
For axle rotation, until the internal conical surface of epivalve 1 is only fitted into the conical surface on bracing frame 11, continue to lower thrust, cross 7 is cut off
Middle pin 13 on center-pole 10, bracing frame 11, cross 7 and epivalve 1 DL synchronization, epivalve 1 bottom cylinder enters
In circular hole 35 on base 3, lock, ball seat is formed, maximum outside diameter is 120mm.
Finally, bracing frame 11 continues traveling downwardly, and forces the base pin 12 that center-pole 10 is connected with base 3 to be cut off, in above carrying
Core bar 10, center-pole 10 cylinder step is up with bracing frame 11, separates with ball seat, finally carries center-pole 10 with bracing frame 11
Go out pit shaft, ball seat is stayed in well, cooperation pitching completes Inter-zonal packing, implements pressure break.
The present invention change sliding sleeve of bushing class instrument need the preset ball seat in down-hole mode, using enter under the later stage ball seat,
And the mode using specific purpose tool formation ball seat, reduce sliding sleeve of bushing class instrument and rely on rubber seal to form the unreliable of ball seat
Property.
The only illustration to the present invention exemplified as above, does not constitute the restriction to protection scope of the present invention, all
It is that same or analogous design belongs within protection scope of the present invention with the present invention.
The part of narration and structure in detail does not belong to well-known components and common structure or the conventional handss of the industry to the present embodiment
Section, does not describe here one by one.
Claims (10)
1. a kind of casing fracturing ball seat it is characterised in that：Including two epivalves (1), two hypovalves (2), base (3), pressure caps
(5), cross (7), jump ring (9)；Two epivalves (1) and two hypovalves (2) are circumferentially alternately distributed up big and down small one of composition
Individual conical cylindrical shape, two epivalves (1) be in 180 ° symmetrical, two hypovalves (2) be in 180 ° symmetrical, base (3) with upper
The lower end of lobe (1) and hypovalve (2) connects；
Described epivalve (1) inwall protrudes a rib one (14) from top to bottom, has a circular anchor in the middle of rib one (14)
Hole (15), anchor hole (15) each side have a semi-circular recesses (16), have a circular arc in the middle part of the arc length of epivalve (1) bottom
Boss (17), circular arc boss (17) bottom is a up-small and down-big two-stage cylinder (18), and cylinder (18) bottom is in cone；
Described hypovalve (2) inwall protrudes a rib two (21) from top to bottom, and rib two (21) both sides have about one respectively
The rectangular recess (22) of insertion, has two-stage arc section boss (23) in the middle part of the arc length of hypovalve (2) bottom；
Described base (3) is thick cyclinder body, symmetrical four grooves in upper end, and two of which is up big and down small trapezoidal groove
(31), two trapezoidal grooves (31) are symmetrical in 180 °, and two other is the two-stage rectangular recess symmetrical in 180 °
(33), described base (3) interior lower end sets " cross " rib, and " cross " rib center is provided with a circular hole, described
Rectangular recess (33) is fixed with the two-stage arc section boss of hypovalve (2) bottom, and described trapezoidal groove (31) bottom has one
Circular hole (35), described jump ring (9) is fixed in circular hole (35) by pressure cap (5), and described epivalve (1) lower cylindrical passes through jump ring
(9) fixing with base (3)；
Described cross (7) is arranged in the taper cone barrel that epivalve (1) and hypovalve (2) form, and the centre of described cross (7) is circle
Hole, circular hole surrounding stretches out four arms, the rib one (14) of described two epivalves (1) and the rib two (21) of two hypovalves (2) point
It is not connected with four arms of cross (7), in internal " cross " rib with base (3) of the circular hole in the middle of described cross (7)
The circular hole coaxial of the heart.
2. casing fracturing ball seat as claimed in claim 1 it is characterised in that：Described epivalve (1) top arc length is on taper cone barrel
The 3/10 of portion's overall circumference, epivalve (1) bottom arc length is the 1/5 of taper cone barrel bottom overall circumference.
3. casing fracturing ball seat as claimed in claim 1 it is characterised in that：Described epivalve (1) upper inner is a circular cone
Shape inclined-plane, circular arc boss (17) arc length of epivalve (1) bottom accounts for the 1/3 of epivalve (1) lower end arc length.
4. casing fracturing ball seat as claimed in claim 1 it is characterised in that：Described epivalve (1) inwall is provided with two threadeds
Nail through hole, is distributed in rib one (14) left and right sides of epivalve (1).
5. casing fracturing ball seat as claimed in claim 1 it is characterised in that：Described hypovalve (2) top arc length is on taper cone barrel
The 1/5 of portion's overall circumference, hypovalve (2) bottom arc length is the 3/10 of taper cone barrel bottom overall circumference.
6. casing fracturing ball seat as claimed in claim 1 it is characterised in that：Described hypovalve (2) upper inner is a circular cone
Shape inclined-plane, two-stage arc section boss (23) of hypovalve (2) bottom is up-small and down-big, and convex platform arc length accounts for hypovalve (2) lower end arc length
1/6, lower convex platform arc length accounts for the 1/3 of hypovalve (2) lower end arc length.
7. casing fracturing ball seat as claimed in claim 1 it is characterised in that：Described epivalve (1) passes through anchor with cross (7)
(8) connect, hypovalve (2) is connected by keyway mode with cross (7).
8. casing fracturing ball seat as claimed in claim 1 it is characterised in that：Symmetrical two of described base (3) lateral surface
Manhole (32), this manhole (32) axis and trapezoidal groove (31) axis are in 45 ° counterclockwise.
9. the casing fracturing ball seat as described in claim 1 or 8 it is characterised in that：Internal " cross " rib of described base (3)
The circular hole outside wall surface at center has two tapped through holes (34), and this tapped through hole (34) is same with the manhole (32) on base (3)
Axle.
10. casing fracturing ball seat as claimed in claim 1 it is characterised in that：Described epivalve (1), hypovalve (2), base (3),
Pressure cap (5), cross (7) and jump ring (9) are all formed using dissolvable metal material processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711276.0A CN104405338B (en) | 2014-12-01 | 2014-12-01 | Sleeve fracturing ball seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711276.0A CN104405338B (en) | 2014-12-01 | 2014-12-01 | Sleeve fracturing ball seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104405338A CN104405338A (en) | 2015-03-11 |
| CN104405338B true CN104405338B (en) | 2017-02-22 |
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ID=52642994
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410711276.0A Active CN104405338B (en) | 2014-12-01 | 2014-12-01 | Sleeve fracturing ball seat |
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| CN (1) | CN104405338B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975835B (en) * | 2015-06-11 | 2017-10-17 | 中国石油天然气股份有限公司 | A kind of elastic pressure break ball seat |
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