CN107461160A - A kind of arc form flexibility slip insert long-life casing head - Google Patents
A kind of arc form flexibility slip insert long-life casing head Download PDFInfo
- Publication number
- CN107461160A CN107461160A CN201710255659.5A CN201710255659A CN107461160A CN 107461160 A CN107461160 A CN 107461160A CN 201710255659 A CN201710255659 A CN 201710255659A CN 107461160 A CN107461160 A CN 107461160A
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- Prior art keywords
- ring
- casing head
- slip insert
- slips
- arc form
- Prior art date
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- Granted
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 64
- 239000002184 metal Substances 0.000 claims abstract description 64
- 238000007789 sealing Methods 0.000 claims abstract description 56
- 239000002131 composite material Substances 0.000 claims abstract description 12
- 230000000703 anti-shock Effects 0.000 claims abstract description 10
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 8
- 230000000712 assembly Effects 0.000 claims abstract description 6
- 238000000429 assembly Methods 0.000 claims abstract description 6
- 229920001971 elastomer Polymers 0.000 claims description 16
- 239000005060 rubber Substances 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 229920006168 hydrated nitrile rubber Polymers 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 9
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 3
- 238000003486 chemical etching Methods 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002113 chemopreventative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a kind of arc form flexibility slip insert long-life casing head, including bottom plate, annular backup pad, manual flat valve, anti-shock pressure meter, WE type arc form flexibility slips hanger assemblies, c-type composite sealing ring, casing head body, H type metal o-ring assemblies, lower curved formula flexibility slips assembly, gasket ring I, stud, nut, gasket ring II.Arc form flexibility slip insert of the present invention compares conventional spur type slip insert, bearing capacity is bigger, make bushing outer surface uniform force, therefore the occlusion to sleeve pipe will not be caused to damage, the corrosion resistance of the slip insert of titanium alloy be common alloy steel nearly a hundred times, intensity increase, the weight saving of hanger, casing head integral seal structure uses metal sealing coil structures substantially, high temperature resistant, ability resistant to chemical etching is stronger, ensure the long-life of slips hanger, it is suitable for the combination of existing deep-well and ultradeep well casing head of well head, extend slips hanger uses field.
Description
Technical field
The present invention relates to drilling technology field, and in particular to a kind of arc form flexibility slips for ultra-deep high-pressure oil-gas well
Tooth long-life casing head.
Background technology
Casing head is the necessary equipment of connection sleeve pipe and wellhead assembly during oil, natural gas drilling.Casing head works
Principle is interacted by casing head slips and sleeve pipe and hanger, and lower going-into-well middle sleeve weight is hanged by slips, slips
Hanging device is delivered to casing head pedestal so that casing head all bears casing wt, now casing head shell, slips hanger, card
Watt and sleeve pipe will bear compared with noticeable effort, it is desirable to each several part laser intensity must is fulfilled for requiring.
At present, casing head is usually split type and monoblock type, all configures anti-slip-type hanger or mandrel formula hanger, point
Body formula casing head is installed inconvenience, wasted time and energy in use；Integral casing head is rational in infrastructure, saves material, and can letter
The installation procedure of chemoprevention spray apparatus, is easily assembled.Inverted slips formula hanger, easily occur obvolvent loosely phenomenon in use,
Play above and below sleeve pipe meeting, sealing property and security reliability are poor, also easy damaged sleeve pipe；Using the mandrel formula of the airtight closures of PT-CQ
Hanger is big for hanging although sealing property, pressure-resistant performance and the more anti-slip type casing head of functional reliability increase
The larger surface pipe of caliber, by its structure is limited, in the confined space of casing head bottom, mandrel formula hanger is difficult to pacify
Put, thus it is inconvenient for use.And casing head will reach the fixed well head of control when oil, gas and water well carry out drilling well, and support, be fixed
The casing string of G.I.H, the purpose of preventer group is installed, therefore the sealing of casing head is critically important for construction safety, particularly
Occur to play a key effect during the blowout phenomenons such as overflow, well kick in well.For existing 95/8 " -24 " casing hanger assembly
The stress and contact force for hanging various conventional steel-grade bushings are analyzed, and are found to be only applicable to shallow-layer with each steel-grade bushing and are discontented with
300 tons of ultimate loads of foot, sleeve pipe maximum unilateral force occurs in slips indentation, there, and slips and slips hanger contact force are maximum
Value also occurs in indentation, there, and it is uneven that slip insert contacts with sleeve outer wall face, and main cause is that slips is by circumferential receipts
Contracting clamping sleeve pipe so that slips, casing-contact power are asymmetric.Due to slips asymmetry so that slips, casing stress distributed pole
Uneven, slips breach opposite stress value is maximum.
Therefore, the problem of slips is primarily present at present be：The casing head of prior art is single layer sealing structure, only in slips
The lower end of hanger is sealed provided with a BT sealing ring, borehole pressure occur it is unstable in the case of, sealing ring it is close
Envelope effect can be affected, and be unfavorable for the blowout phenomenon of quick control well head, slip insert is uneven to the extruding force of sleeve pipe, causes
Casing strength decline and early stage failure, common alloy slip insert gets rusty easily under severe work condition environment, tooth stress not
It is easily damaged, it is necessary to often change.
The content of the invention
The defects of for above-mentioned slips structure and sealing structure, the present invention devise a kind of arc form flexibility slips dental structure
With the long-life casing head of metal sealing bearing structure.
Technical scheme is as follows：
A kind of arc form flexibility slip insert long-life casing head, the present invention support gasket ring I, annular backup pad, branch by bottom plate
Stake pad ring II, greasing check valve, manual flat valve, thread flange, plug, right-angle type stop valve, anti-shock pressure meter, instrument method
Orchid, WE type arc form flexibility slips hanger assemblies, jackscrew assembly, screw one, c-type composite sealing ring, wedge metal sealing ring
I, soket head cap screw, joint, casing head body, metal o-ring assembly, lower curved formula flexibility slip insert, wedge metal sealing
Ring II, slips housing, screw two, spring washer, gasket ring I, stud, gasket ring II form, the bottom plate it is upper
Portion is welded and fixed with supporting pad ring, is connected with annular backup pad, support gasket ring II, casing head body above support gasket ring in turn,
Horizontal through hole pipeline is provided with the middle part of described sleeve pipe head body, greasing check valve is arranged under the through hole pipeline of casing head body
Side, middle vehicle have screw thread, and casing head body side is drilled with screwed hole, and greasing check valve is connected with casing head body using screw thread
Connect, described sleeve pipe head body is symmetrically arranged two manual flat valves, and the manual flat valve is oil field standard PFF78-70
Sulfur resistive flap type, the left and right partially manual flap type of casing head body is by thread flange and casing head body by stud, spiral shell
Mother is fastenedly connected, and the gasket ring I is embedded in the annular groove of manual flat valve and casing head body, the metal o-ring
Assembly is installed in the rectangular channel of casing head body, and casing head body inner ring is machined with the rectangle coordinated with metal o-ring assembly
Groove, anti-shock pressure meter, right-angle type stop valve are connected with instrument flange by NPT taper pipe threads, and anti-shock pressure meter is connected to right angle
In the screwed hole of formula stop valve, the jackscrew assembly is arranged in the tapped through hole of casing head body radial direction processing, sealing
Gasket ring II is arranged in the seal groove being pre-machined of casing head body upper surface, and the joint screw thread is connected to casing head body
Left end thread flange end face, plug are welded on the thread flange end face on the right of casing head body.
Further, the WE type slips shell inner surfaces of the WE types arc form flexibility slips hanger assembly are machined with three
Layer step, arc form flexibility slip insert outer surface is machined with three layers of step, and is installed with WE type slips housings with step, interior
Hex screw circumferential directions fasten WE type slips shells on WE type slips housings and arc form flexibility slip insert circumferencial direction
Body and arc form flexibility slip insert, WE type slips housings upper surface circumferencial direction are threaded hole, pass through screw three, metal gasket
Circle is connected with support gasket ring, and wedge metal sealing ring I and wedge metal sealing ring are embedded in arc form flexibility slip insert
In the wedge-shaped slot of outer surface, the soket head cap screw compresses WE type arc form flexibility slips hanger assembly arc form flexibility slips
Tooth, WE type arc form flexibility slips hangers assembly coordinate on the endoporus taper surface of casing head body.
Further, the lower curved formula flexibility slip insert outer surface is machined with quadruple board platform rank, and slips housing is machined with
Quadruple board platform rank, lower curved formula flexibility slip insert are installed with slips housing with step, slips housing lower surface circumferencial direction
Hole is threaded, by screw, spring washer, is connected with support gasket ring II, wedge metal sealing ring II is embedded in down
In the wedge-shaped slot of the outer surface of portion's arc form flexibility slip insert.
Further, the metal o-ring assembly is by the metal o-ring seat of honour, H types metal o-ring and metal o-ring
Lower seat composition, H type metal o-rings are arranged under the metal o-ring seat of honour and metal o-ring among seat, and compression fit, gold
The category sealing ring seat of honour is made up with seat under metal o-ring of 12Cr13 machine-shapings, H type metal o-rings of 15CrNiMo.
Further, it is characterised in that the c-type composite sealing ring is molded into O-ring seal and c-type rubber ring
Type, c-type rubber ring can bear space six direction pressure-bearing function by lip-type packing Structure Improvement Design, compound from c-type
Sealing ring selects HNBR hydrogenated nitrile-butadiene rubber materials, and its relatively common rubber ring intensity is higher, resistance to oxidation, ageing-resistant, high temperature resistant,
Chemically-resistant acid and alkali corrosion performance is stronger, ensures that the sealing structure life-span is longer.
Further, the lower curved formula flexibility slip insert along the circumferential direction processes cylinder slips structure, then indulges again
To piecemeal slips is cut into, it is installed on slips casing step, exploitativeness identical with the installation method of ordinary straight slip insert
By force, it is easy to utilize.
Further, in the course of work, the plug of casing head body right end portion is blocked, casing head body left end portion
Joint can connect external high pressure pipeline.
The integral sealing part of the present invention uses shape metallic leak-proof structure, few rubber sealing element, high temperature resistant, corrosion resistant substantially
Erosion, service life extend, and reduce the maintenance cost and labor intensity for changing rubber seal.
The beneficial effects of the invention are as follows：
1) rubber sealing element is substituted using the compound sealing structure of shape metallic leak-proof structure, ensures pressure-bearing effect, extension makes
With the life-span, replacement frequency is reduced, sealing effectiveness is superior, and wedge metal sealing ring is designed between slips housing and slip insert, is subtracted
The relative wear of small slips housing and slips centric stop；
2) upper seal is replaced by c-type composite sealing ring, relatively common O-ring seal or rectangular seal, protected
Card multidirectional pressure-bearing and sealing property, c-type composite sealing ring under external load effect select HNBR hydrogenated nitrile-butadiene rubber materials
Material, its relatively common rubber ring intensity is higher, and resistance to oxidation, ageing-resistant, high temperature resistant, chemically-resistant acid and alkali corrosion performance are stronger, ensures
The sealing structure life-span is longer；
3) arc form flexibility slip insert is used, compared to conventional spur type slip insert, bearing capacity is bigger, makes sleeve pipe appearance
Face uniform force, therefore hardly cause the occlusion to sleeve pipe to damage, the corrosion resistance of the slip insert of titanium alloy is common
Steel alloy is nearly a hundred times；
4) the arc form flexibility slip insert that the present invention designs is titanium alloy material, and corrosion-resistant and resistance to elevated temperatures is stronger, and
And there is stronger elastic deformation so that slips, casing stress are evenly distributed, and will not cause to slips housing and slip insert cooperation
Step surface stress value it is excessive, will not also form the damage to the sleeve surface of contact, while the damage of itself tooth will not be caused
Wound；
5) by using the slip insert of titanium alloy material, mitigate casing head overall weight, and then reduce lifting and remove
Dynamic labor intensity, it is easier to which processing and assembling, exploitativeness is strong, promotes the use.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of structural representation of arc form flexibility slip insert long-life casing head；
Fig. 2 a are the 3-D solid structure figure of the present invention；
Fig. 2 b are the 3-D solid structure figure of prior art；
Fig. 3 a are the mounting structure schematic diagram of conventional spur type slip insert；
Fig. 3 b are the mounting structure schematic diagram of arc form flexibility slip insert；
Fig. 4 is a kind of H type metal o-ring assembly structure schematic diagrames of arc form flexibility slip insert long-life casing head；
Fig. 5 is a kind of two kinds of structure slip insert scheme of installations of arc form flexibility slip insert long-life casing head；
Fig. 6 is a kind of WE type arc form flexibility slips hanger assembly knots of arc form flexibility slip insert long-life casing head
Structure schematic diagram；
Fig. 7 a are the slip insert stress change schematic diagram of the present invention；
Fig. 7 b are the slip insert stress change schematic diagram of prior art.
Shown in figure：
1- bottom plates, 2- gasket rings, 3- annular backup pads, 4- greasings hole, 5- greasing check valves, 6- manual flat valves, 7- screw threads
Flange, 8- plugs, 9- right-angle type stop valves, 10- anti-shock pressure meters, 11- instrument flanges, 12-WE type arc form flexibility slips hang
Hanging device assembly, 13- jackscrew assemblies, 14- screws, 15-C type composite sealing rings, 16- wedge metals sealing ring I, hexagonal spiral shell in 17-
Nail, 18- joints, 19- casing head bodies, 20- metal o-ring assemblies, 21- wedge metals sealing ring II, 22- lower curved formulas
Flexible slip insert, 23- slips housings,
A1, A2- screw spring washer,
A3- gasket rings I,
A4, A5, A6, A7- stud,
A8- gasket rings II,
121-WE type slips housings, 122- arc form flexibility slip inserts, 123- metal washers, 124- support gasket rings, 125-
Screw,
151-O type sealing rings, 152-C type rubber rings.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples, but is not limited to the present invention.
As shown in Fig. 1~Fig. 7, a kind of arc form flexibility slip insert long-life casing head, it is characterised in that the present invention is the bottom of by
Plate 1, gasket ring I 2 is supported, annular backup pad 3, supports gasket ring II 4, greasing check valve 5, manual flat valve 6, thread flange 7, plug
8, right-angle type stop valve 9, anti-shock pressure meter 10, instrument flange 11, WE type arc form flexibility slips hangers assembly 12, jackscrew is total
Into 13, screw 1, c-type composite sealing ring 15, wedge metal sealing ring I 16, soket head cap screw 17, joint 18, casing head sheet
19, metal o-ring assembly 20, lower curved formula flexibility slip insert 21, wedge metal sealing ring II 22, slips housing 23, spiral shell
Nail, spring washer A1, A2, the A3 of gasket ring I, stud, nut A4, A5, A6, A7, the A8 of gasket ring II compositions；Bottom plate 1
Top be welded and fixed with support gasket ring 2, for supporting top parts, the upper surface of annular backup pad 3 is with supporting gasket ring II 4 to connect
Touch, the car of greasing check valve 5 has screw thread, and casing head body 19 is drilled with screwed hole, greasing check valve 5 and the spiral shell of casing head body 19
Line connects, and described sleeve pipe head body 19 is symmetrically arranged two manual flat valves 6, and the manual flat valve 6 is oil field standard
PFF78-70 sulfur resistive flap types, the left and right partially manual flap type 6 of casing head body 19 pass through thread flange 7 and casing head body
19 are fastenedly connected by stud, nut A4, A5, and the A3 of gasket ring I is embedded in manual flat valve 6 and casing head body 19
Annular groove in, the metal o-ring assembly 20 is installed in the rectangular channel of casing head body 19, the inner ring of casing head body 19
The rectangular channel coordinated with metal o-ring assembly 20, anti-shock pressure meter 10 are machined with, right-angle type stop valve 9 leads to instrument flange 11
The connection of NPT taper pipe threads is crossed, anti-shock pressure meter 10 is connected in the screwed hole of right-angle type stop valve 9, and the jackscrew assembly 13 is pacified
In the tapped through hole of the radial direction of casing head body 19 processing, the A8 of gasket ring II is arranged on the upper surface of casing head body 19
The seal groove being pre-machined in, the joint 18 is threaded in the end face of 19 left end thread flange of casing head body 7, plug 8
It is welded on the end face of thread flange 7 on the right of casing head body 19；The WE type cards of WE type arc form flexibility slips hangers assembly 12
Watt inner surface of housing 121 is machined with three layers of step, and the outer surface of arc form flexibility slip insert 122 is machined with three layers of step, arc form
Flexible slip insert 122 is that axially cutting pintongs mutual cooperation is symmetrically installed, and is pacified with WE type slips housing 121 with step
Dress, the circumferential directions of soket head cap screw 17 on WE type slips housing 121 and the circumferencial direction of arc form flexibility slip insert 122,
Fastening WE type slips housing 121 and arc form flexibility slip insert 122, the upper surface circumferencial direction of WE type slips housing 121 are machined with
Screwed hole, it is connected by screw 3 125, metal washer 123 and support gasket ring 124, wedge metal sealing ring I 16 and wedge shape
Metallic packing ring 161 is embedded in the wedge-shaped slot of the outer surface of arc form flexibility slip insert 122, and the soket head cap screw 17 compresses
The arc form flexibility slip insert 122 of WE type arc form flexibility slips hangers assembly 12, WE type arc form flexibility slips hangers are total
Coordinate into 12 and be arranged on the endoporus taper surface that casing head body 19 is pre-machined；The outer surface of lower curved formula flexibility slip insert 21
Be machined with quadruple board platform rank, slips housing 23 is machined with quadruple board platform rank, lower curved formula flexibility slip insert 21 and slips housing 23 by
Step coordinates installation, and the lower surface circumferencial direction of slips housing 23 is threaded hole, by screw, spring washer A1, A2, with branch
Stake pad ring II 4 is connected, and wedge metal sealing ring II 22 is embedded in the wedge of the outer surface of lower curved formula flexibility slip insert 21
In shape groove；Metal o-ring assembly 20 is by seat under the metal o-ring seat of honour 201, H types metal o-ring 202 and metal o-ring
203 compositions, H types metal o-ring 202 is arranged under the metal o-ring seat of honour 201 and metal o-ring among seat 203, and is compressed
Coordinate, under the metal o-ring seat of honour 201 and metal o-ring seat 203 by 12Cr13 machine-shapings, H types metal o-ring 202 by
15CrNiMo is made；
As best shown in figures 3 a and 3b, c-type composite sealing ring 15 is molded into O-ring seal 151 and c-type rubber ring 15
Type, c-type rubber ring 152 can bear space six direction pressure-bearing function, from c-type by lip-type packing Structure Improvement Design
Composite sealing ring 15 use HNBR hydrogenated nitrile-butadiene rubber materials, its relatively common rubber ring intensity is higher, resistance to oxidation, it is ageing-resistant,
High temperature resistant, chemically-resistant acid and alkali corrosion performance are stronger, ensure that the sealing structure life-span is longer；Lower curved formula flexibility slip insert 21 is along circle
Circumferential direction processes cylinder slips structure, and then longitudinally cutting again is piecemeal slips, is installed on the step of slips housing 23, and commonly
The installation method of straight slip insert is identical, and exploitativeness is strong, easy to utilize.
In the course of work, the plug 8 of the right end portion of casing head body 19 is blocked, the left end portion of casing head body 19 connects
Head can connect external high pressure pipeline；Casing head integral sealing part uses shape metallic leak-proof structure, few rubber seal member substantially
Part, high temperature resistant is corrosion-resistant, and service life extends, and reduces the maintenance cost and labor intensity for changing rubber seal；It is in Fig. 7
The contrast of the arc form flexibility slips stress of straight thread tooth slips and this patent effect, it is found that straight thread tooth slips is local to sleeve pipe
Influence huge, and stress distribution is uneven, and upper and lower ends are big, middle small, arc form flexible thread tooth slips sleeve pipe is influenceed it is smaller,
And stress distribution is uniform.
A kind of arc form flexibility slip insert long-life casing head provided by the present invention, its arc form flexibility slip insert are all adopted
It is made of titanium alloy material, compared to conventional spur type slip insert, bearing capacity is bigger, makes bushing outer surface uniform force, because
This hardly causes the occlusion to sleeve pipe to damage, and the corrosion resistance of the slip insert of titanium alloy is nearly the hundred of common alloy steel
Times, sealing structure use metal sealing coil structures substantially, ensures the long-life of slips hanger, be suitable for existing deep-well with
The combination of ultradeep well casing head of well head, extend slips hanger uses field.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, the technical spirit according to the present invention
Any simple modification, equivalent change and modification made to above example, in the range of still falling within technical solution of the present invention.
Claims (7)
1. a kind of arc form flexibility slip insert long-life casing head, it is characterised in that the present invention is by bottom plate (1), support gasket ring I
(2), annular backup pad (3), support gasket ring II (4), greasing check valve (5), manual flat valve (6), thread flange (7), plug
(8), right-angle type stop valve (9), anti-shock pressure meter (10), instrument flange (11), WE type arc form flexibility slips hanger assemblies
(12), jackscrew assembly (13), screw one (14), c-type composite sealing ring (15), wedge metal sealing ring I (16), soket head cap screw
(17), joint (18), casing head body (19), metal o-ring assembly (20), lower curved formula flexibility slip insert (21), wedge shape
Metallic packing ring II (22), slips housing (23), screw two, spring washer (A1, A2), gasket ring I (A3), stud
(A4, A5, A6, A7), gasket ring II (A8) composition, top and the support gasket ring (2) of the bottom plate (1) are welded and fixed, supported
It is connected with annular backup pad (3), support gasket ring II (4), casing head body (19), described sleeve pipe head sheet above gasket ring (2) in turn
Horizontal through hole pipeline is provided with the middle part of body (19), greasing check valve (5) is arranged at below the through hole pipeline of casing head body (19)
Inner side, middle vehicle have screw thread, and casing head body (19) is drilled with screwed hole, greasing check valve (5) and casing head body (19)
Threaded connection, described sleeve pipe head body (19) are symmetrically arranged two manual flat valves (6), and the manual flat valve (6) is
Oil field standard PFF78-70 sulfur resistive flap types, the left and right partially manual flap type (6) of casing head body (19) pass through thread flange
(7) it is fastenedly connected with casing head body (19) by stud, nut (A4, A5), the gasket ring I (A3) is embedded in manually
In the annular groove of flap type (6) and casing head body (19), the metal o-ring assembly (20) is installed in casing head body
(19) in rectangular channel, casing head body (19) inner ring is machined with the rectangular channel coordinated with metal o-ring assembly (20), antidetonation
Pressure gauge (10), right-angle type stop valve (9) are connected with instrument flange (11) by NPT taper pipe threads, and anti-shock pressure meter (10) is even
It is connected in the screwed hole of right-angle type stop valve (9), the jackscrew assembly (13) adds installed in casing head body (19) radial direction
In the tapped through hole of work, gasket ring II (A8) is arranged in the seal groove being pre-machined of casing head body (19) upper surface,
The joint (18) is threaded in casing head body (19) left end thread flange (7) end face, and plug (8) is welded on casing head sheet
Thread flange (7) end face on the right of body (19).
A kind of 2. arc form flexibility slip insert long-life casing head according to claim 1, it is characterised in that the WE types
WE type slips housing (121) inner surface of arc form flexibility slips hanger assembly (12) is machined with three layers of step, and arc form is soft
Property slip insert (122) outer surface is machined with three layers of step, and is installed with WE type slips housings (121) with step, interior hexagonal
Screw (17) circumferential directions are on WE type slips housings (121) and arc form flexibility slip insert (122) circumferencial direction, fastening
WE type slips housings (121) and arc form flexibility slip insert (122), the processing of WE type slips housing (121) upper surface circumferencial direction
There is screwed hole, be connected by screw three (125), metal washer (123) and support gasket ring (124), wedge metal sealing ring I
(16) it is embedded in wedge metal sealing ring (161) in the wedge-shaped slot of the outer surface of arc form flexibility slip insert (122), it is described interior
Hex screw (17) compresses WE type arc form flexibility slips hanger assembly (12) arc form flexibility slip insert (122), WE type arcs
Form flexibility slips hanger assembly (12), which coordinates, to be arranged on the endoporus taper surface that casing head body (19) is pre-machined, described
Slip insert selects titanium alloy material, and titanium alloy material has good elasticity and toughness, reaches flexible slip insert effect.
A kind of 3. arc form flexibility slip insert long-life casing head according to claim 1, it is characterised in that the bottom
Arc form flexibility slip insert (21) outer surface is machined with quadruple board platform rank, and slips housing (23) is machined with quadruple board platform rank, lower curved
Formula flexibility slip insert (21) is installed with slips housing (23) with step, and slips housing (23) lower surface circumferencial direction is machined with
Screwed hole, by screw, spring washer (A1, A2), it is connected with support gasket ring II (4), wedge metal sealing ring II (22)
It is embedded in the wedge-shaped slot of the outer surface of lower curved formula flexibility slip insert (21).
A kind of 4. arc form flexibility slip insert long-life casing head according to claim 1, it is characterised in that the metal
Sealing ring assembly (20) is by seat (203) group under the metal o-ring seat of honour (201), H types metal o-ring (202) and metal o-ring
Into H types metal o-ring (202) is arranged under the metal o-ring seat of honour (201) and metal o-ring among seat (203), and is pressed
Tight fit, the metal o-ring seat of honour (201) are with seat (203) under metal o-ring by 12Cr13 machine-shapings, H type metal o-rings
(202) it is made up of 15CrNiMo.
A kind of 5. arc form flexibility slip insert long-life casing head according to claim 1, it is characterised in that the c-type
Composite sealing ring (15) injection molding with O-ring seal (151) and c-type rubber ring (152), c-type rubber ring (152) is by lip
Shape sealing ring Structure Improvement Design, space six direction pressure-bearing function can be born, be selected from c-type composite sealing ring (15)
HNBR hydrogenated nitrile-butadiene rubber materials, its relatively common rubber ring intensity is higher, resistance to oxidation, ageing-resistant, high temperature resistant, chemically-resistant soda acid
Corrosive nature is stronger, ensures that the sealing structure life-span is longer.
A kind of 6. arc form flexibility slip insert long-life casing head according to claim 1, it is characterised in that the bottom
Arc form flexibility slip insert (21) along the circumferential direction processes cylinder slips structure, and then longitudinally cutting again is piecemeal slips, installation
In on slips housing (23) step, identical with the installation method of ordinary straight slip insert, exploitativeness is strong, easy to utilize.
A kind of 7. arc form flexibility slip insert long-life casing head according to claim 1, it is characterised in that the course of work
In, the plug (8) of casing head body (19) right end portion is blocked, the joint connection of casing head body (19) left end portion is outside
High pressure line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710255659.5A CN107461160B (en) | 2017-04-19 | 2017-04-19 | Arc-shaped flexible slip tooth long-life casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710255659.5A CN107461160B (en) | 2017-04-19 | 2017-04-19 | Arc-shaped flexible slip tooth long-life casing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107461160A true CN107461160A (en) | 2017-12-12 |
| CN107461160B CN107461160B (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710255659.5A Active CN107461160B (en) | 2017-04-19 | 2017-04-19 | Arc-shaped flexible slip tooth long-life casing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107461160B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761731A (en) * | 2019-11-19 | 2020-02-07 | 威飞海洋装备制造有限公司 | Slip hanger capable of realizing automatic or manual independent excitation |
| CN111963076A (en) * | 2020-08-05 | 2020-11-20 | 中国石油天然气集团有限公司 | Air-tight screw-connected pipe joint |
| CN114293973A (en) * | 2021-12-31 | 2022-04-08 | 杰瑞能源服务有限公司 | Logging tool string and manufacturing process thereof |
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|---|---|---|---|---|
| CN110761731A (en) * | 2019-11-19 | 2020-02-07 | 威飞海洋装备制造有限公司 | Slip hanger capable of realizing automatic or manual independent excitation |
| CN111963076A (en) * | 2020-08-05 | 2020-11-20 | 中国石油天然气集团有限公司 | Air-tight screw-connected pipe joint |
| CN114293973A (en) * | 2021-12-31 | 2022-04-08 | 杰瑞能源服务有限公司 | Logging tool string and manufacturing process thereof |
| CN114293973B (en) * | 2021-12-31 | 2024-03-12 | 杰瑞能源服务有限公司 | Logging tool string and manufacturing process thereof |
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|---|---|
| CN107461160B (en) | 2023-05-09 |
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