CN202596633U - Tool for expandable casing in open hole section - Google Patents
Tool for expandable casing in open hole section Download PDFInfo
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- CN202596633U CN202596633U CN 201220177469 CN201220177469U CN202596633U CN 202596633 U CN202596633 U CN 202596633U CN 201220177469 CN201220177469 CN 201220177469 CN 201220177469 U CN201220177469 U CN 201220177469U CN 202596633 U CN202596633 U CN 202596633U
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Abstract
The utility model discloses a tool for an expandable casing in an open hole section, which is applied to construction for the expandable casing in the open hole section in petroleum well completion. The tool for the expandable casing in the open hole section is mainly divided into a hydraulic cylinder body assembly, a piston rod-expandable cone assembly, as well as an expandable tube-anchor assembly. The tool for the expandable casing in the open hole section has the following advantages: construction work for an open hole system in an expandable tubular technical system can be finished; after the tool system is applied to the construction work, the purpose of handling complex underground conditions can be achieved, and the normal performance of a subsequent well drilling process can be ensured, so that well drilling risks and accidents can be effectively disposed, the safety and the reliability of the well drilling process can be improved, and the well drilling speed can be increased; moreover, the consumption of raw materials is reduced, thus the costs of well drilling and well completion are decreased.
Description
Technical field
The utility model relates in the oil and gas industry completion technique field of boring, particularly a kind of instrument of barefoot interval expansion sleeve of the bore hole system that can be applicable to belong to the bulged tube technology system.
Background technology
Bulged tube technology (Expandable Tubular Technology) is the new technology that the nineties produced and grew up last century, can be applicable to operation process such as drilling well, completion, oil recovery, well workover, is described as to bring the new technology of changing sexual development.So-called expansion tube is meant the metal circular tube of processing with special material; Its reset condition has ductility preferably, under the effect of expansion force, through the squeezing action of expansion cone; Its internal diameter and external diameter all obtain expanding and permanent plastic deformation taking place, and expansion rate can reach 15～30%.Bulged tube technology changes the texture structure and the mechanical performance of expansion tube material through expansion tube is implemented the expand tube operation, and its intensity index is improved, and plasticity index descends.Bulged tube technology can make expansion tube obtain the mechanical performance index suitable with specific steel-grade bushing, thereby satisfy the instructions for use of petroleum works through selecting or technological means such as adjustment expansion tube material, control expansion rate.
Bulged tube technology generally can be used to solve the variety of issue that bad ground causes, like the shutoff serious thief zone, solves the well problem etc. that collapses, and also can be used for the subsidy and the reparation of sleeve pipe.Purposes according to bulged tube technology is classified to it, can be divided into casing patching system, bore hole system, expansion tail tube hanging system and equal diameter and bore several big technical systems such as completion system.
Expansion tube bore hole system is meant when brill in the drilling process meets the barefoot interval of problem, between the former cannula series commonly used of this barefoot interval, adds one section (or multistage) expansion tube, and makes the mechanical performance technology suitable with former sleeve pipe of expansion tube.Under regular situation; The cased technical measures of can taking wellbore construction to shift to an earlier date solve the chance problem of boring; Consequently, will cause a series of related technical problem, even the brill that has influence on the final purpose layer reaches owing to upset the sleeve pipe sequence of former drilling design defined.Expansion tube bore hole systems technology is utilized in the expansion tube that adds between former cannula series commonly used, and after work progress was accomplished, the well latus rectum lost hardly, thereby has both reached the purpose of handling down hole problem, can guarantee normally carrying out of follow-up drilling process again.
Summary of the invention
The purpose of the utility model is: a kind of instrument of barefoot interval expansion sleeve is provided, can accomplishes the construction of expansion sleeve at barefoot interval, reach the technical requirements of expansion sleeve.
The technical scheme that the utility model adopts is: the instrument of barefoot interval expansion sleeve, mainly form by last tubing coupling, lifting connecting rod, spring base, spring, wedge, spring housing, shear pin, expansion sleeve, piston dust ring, inner oil tube box cupling, piston adjusting lever, crossover sub, cylinder body dust ring, cylinder body adjustment cover, rubber sleeve, one-level hydraulic cylinder body, first stage piston bar, cylinder body connecting rod, second piston rod, two-stage hydraulic cylinder cylinder body, hydraulic cylinder sealing cover, expansion cone connecting rod, expansion cone and hold-down nut.Be divided into hydraulic cylinder body assembly, piston rod and expansion cone assembly and expansion tube and anchor assembly three parts.
The structure of hydraulic cylinder body assembly is to go up the tubing coupling lower end and promote the connecting rod upper end through being threaded.Promoting the connecting rod lower end links to each other through the inner oil tube box cupling with the crossover sub upper end.The crossover sub lower end is threaded with cylinder body adjustment set upper side; The cylinder body dust ring is enclosed within the crossover sub lower end and adjusts the set upper side near cylinder body; Inner surface at the cylinder body adjustment cover that matches with the first stage piston rod outer surface has seal groove, and sealing ring is installed in the seal groove.Cylinder body adjustment cover lower end is threaded with one-level hydraulic cylinder body upper end, and piston stroke termination place on the one-level hydraulic cylinder body has steam vent, and the piston lower end of piston stroke termination place on the one-level hydraulic cylinder body has discharge orifice.One-level hydraulic cylinder body lower end is threaded with cylinder body connecting rod upper end, and cylinder body connecting rod upper end external surface and lower end inner surface have seal groove, and sealing ring is installed in the seal groove.Cylinder body connecting rod lower end is threaded with two-stage hydraulic cylinder cylinder body upper end, and piston stroke termination place on the two-stage hydraulic cylinder cylinder body has steam vent.Two-stage hydraulic cylinder cylinder body lower end is connected with the hydraulic cylinder sealing external threading, and hydraulic cylinder sealing set upper side external surface and lower end inner surface have seal groove, and sealing ring is installed in the seal groove.
The formation of piston rod and expansion cone assembly is that the piston dust ring is enclosed within piston adjusting lever upper end, and with piston adjusting lever relative fixed.Piston adjusting lever lower end is threaded with first stage piston bar upper end, on the external surface of the first stage piston bar that matches with one-level hydraulic cylinder body inner surface, seal groove is arranged, and sealing ring is installed in the seal groove, and the piston lower end of first stage piston bar also has discharge orifice.First stage piston bar lower end is threaded with the second piston rod upper end, on the external surface of the second piston rod that matches with the two-stage hydraulic cylinder inner surface of cylinder block, seal groove is arranged, and sealing ring is installed in the seal groove, and the piston lower end of second piston rod has discharge orifice.The second piston rod lower end is threaded with expansion cone connecting rod upper end, and the expansion cone connecting rod has blind hole along central axis, and body of rod external surface has the shoulder of protrusion to bore with fixed expansion.Expansion cone is enclosed within the lower end of expansion cone connecting rod and abuts against the shoulder lower end of expansion cone connecting rod.Expansion cone is in expansion sleeve bottom, and the part of expansion cone is in outside the expansion sleeve, and the maximum outside diameter of expansion cone equals the maximum outside diameter of expansion tube.Expansion cone adopts a kind of alloy steel processing and manufacturing, has higher surface hardness.Hold-down nut be installed in expansion cone connecting rod lower end and near the expansion cone lower end with the locking expansion cone, the hold-down nut lower end is furnished with circlip for shaft with locking.
Expansion tube is that spring base is threaded with the spring housing upper end with the formation of anchor assembly.Spring housing lower end and expansion sleeve upper end is connected through shear pin, and the spring housing lower inner surface is that to have tapering be 5 ° inclined-plane.The external surface of wedge is the inclined-plane that has identical tapering with the spring housing lower inner surface, and the inner surface of wedge has anti-slop serrations.Wedge is installed in the spring housing lower inside, and the external surface of wedge is close to the spring housing lower inner surface.The expansion sleeve external surface every at a distance from 120～150mm apart from the vulcanized rubber cover, rubber sleeve can make the better adaptability of expansion sleeve to the bore hole borehole wall, the enhancing expansion sleeve is to the stickiness of the bore hole borehole wall.
Piston rod and expansion cone assembly are installed in that the hydraulic cylinder body assembly is inner, and the two has constituted the bloat tool string of the instrument of barefoot interval expansion sleeve, and the bloat tool string is installed in expansion tube and anchor assembly inside and is used for the expansion sleeve that expands.
The instrument work progress of barefoot interval expansion sleeve is used in summary.When constructing, the last tubing coupling of available oil pipe fastening means system or with drilling rod connect crossover sub again the last tubing coupling of fastening means system with the barefoot interval place that is scheduled in the kit system lower going-into-well.Can suppress the expand tube operation after connecting high-pressure pump and the high pressure line on ground.When suppressing; Highly pressurised liquid gets into the space between cylinder body connecting rod and the first stage piston bar through the discharge orifice on the first stage piston bar; Highly pressurised liquid gets into the space between hydraulic cylinder sealing cover and the second piston rod through the discharge orifice on the second piston rod simultaneously; Thereby promote hydraulic cylinder body assembly and piston rod and the relative motion of expansion cone assembly, the hydraulic cylinder body assembly has downward movement tendency, and piston rod and expansion cone assembly have movement tendency upwards.But, owing in expansion tube and anchor assembly, adopted design, make the downward movement tendency of hydraulic cylinder body assembly be prevented from, so the bloat tool string of the instrument of barefoot interval expansion sleeve only has movement tendency upwards with wedge.When the pressure of the highly pressurised liquid that injects reaches the bulbs of pressure of design, piston rod and expansion cone assembly will move upward, thereby make expansion cone that expansion sleeve is expanded to design size and be fitted on the bore hole borehole wall.The structure of multistage cylinder has been adopted in the design of this bloat tool string, the bulbs of pressure in the time of can reducing the expand tube construction operation, thus and can change the sum of series size reasonable configuration bulbs of pressure of multistage cylinder easily according to actual mode of occupation.
Inject highly pressurised liquid constantly, piston rod and expansion cone assembly can be with the expand distances of 800mm of expansion sleeve, and this distance equals the stroke of piston rod in hydraulic cylinder body.When piston rod and expansion cone assembly moved to the full stroke position, highly pressurised liquid can flow out hydraulic cylinder body from the discharge orifice on the one-level hydraulic cylinder body, and this moment, this tool system can't be kept high pressure, and the bloat tool string has been accomplished an expansion stroke, termination of pumping pressure release.
To different hole conditions, possibly use long expansion tube at barefoot interval, therefore need the instrument of barefoot interval expansion sleeve can carry out the expand tube operation of a plurality of expansion strokes.When the expand tube end of job of an expansion stroke, the existing part of expansion sleeve is swollen to be close to keeps static on the bore hole borehole wall.At this moment, on carry the bloat tool string because expansion sleeve blocks expansion cone, so piston rod and expansion cone assembly can't move upward.Simultaneously; Because the wedge in expansion tube and the anchor assembly can only limit the hydraulic cylinder body assembly and move downward; Can not limit the hydraulic cylinder body assembly and move upward, therefore when on when carrying the bloat tool string hydraulic cylinder body assembly can move upward and suppress return back to hydraulic cylinder body assembly piston rod and expansion cone assembly the preceding relative position of expand tube for the first time.At this moment, turn on pump proceeds to suppress the expand tube operation, can accomplish next expansion stroke.So repeated multiple times can be with the expansion sleeve completion of all expanding.
When expansion sleeve all expands completion, carry the bloat tool string in the continuation, inner oil tube box cupling 10 will promote spring housing has the upwards trend of motion; When on carry the bloat tool string upper lifting force when reaching design load; Shear pin is cut off, and carries the bloat tool string in the continuation and can this tool system be tripped out well head, only stays the expansion sleeve that is swollen and is close on the bore hole borehole wall; This moment, the well latus rectum was the external diameter of expansion cone, so the almost not loss of well latus rectum.So far, the construction operation of using the instrument of barefoot interval expansion sleeve finishes, and can carry out follow-up construction operation according to drilling design.
The beneficial effect of the utility model: the instrument of the utility model barefoot interval expansion sleeve, can accomplish the construction operation of the bore hole system in the bulged tube technology system.After using this tool system and carrying out construction operation, can reach the purpose of handling down hole problem, can guarantee normally carrying out of follow-up drilling process again, therefore can effectively handle drilling well risk and accident, improve the security reliability and the bit speed of drilling process; And reduce raw material and use, thereby reduce the drilling and well completion cost, have very application prospects.
Description of drawings
Fig. 1 a, Fig. 1 b and Fig. 1 c are the structural profile sketch mapes of the instrument of the utility model barefoot interval expansion sleeve.Fig. 1 a is an epimere, and Fig. 1 b is the stage casing, and Fig. 1 c is a hypomere.
When Fig. 2 a, Fig. 2 b and Fig. 2 c are an expansion stroke expand tube end of job, each element present position sketch map of the instrument of barefoot interval expansion sleeve.Fig. 2 a is an epimere, and Fig. 2 b is the stage casing, and Fig. 2 c is a hypomere.
Fig. 3 a and Fig. 3 b be among the utility model embodiment with 9
5/
8" casing wall thickness is to be lowered to 8 among the 11.05mm
1/
2" the open hole well ocular structure generalized section of drill bit and reaming hole to 228～230mm.Fig. 3 a is a well sectional drawing before implementing, and Fig. 3 b implements back well sectional drawing.
Among the figure, the last tubing coupling of 1-, 2-promotes connecting rod, 3-spring base, 4-spring; The 5-wedge, 6-spring housing, 7-shear pin, 8-expansion sleeve, 9-piston dust ring; 10-inner oil tube box cupling, 11-piston adjusting lever, 12-crossover sub, 13-cylinder body dust ring, 14-cylinder body adjustment cover; The 15-rubber sleeve, 16-one-level hydraulic cylinder body, 17-first stage piston bar, 18-cylinder body connecting rod, 19-second piston rod; 20-two-stage hydraulic cylinder cylinder body, 21-hydraulic cylinder sealing cover, 22-expansion cone connecting rod, 23-expansion cone, 24-hold-down nut.
The specific embodiment
Embodiment 1: the instrument with a barefoot interval expansion sleeve is an example, and the utility model is done further explain.
Consult Fig. 1 a, Fig. 1 b and Fig. 1 c.The instrument of the utility model barefoot interval expansion sleeve mainly comprises tubing coupling 1, lifting connecting rod 2, spring base 3, spring 4, wedge 5, spring housing 6, shear pin 7, expansion sleeve 8, piston dust ring 9, inner oil tube box cupling 10, piston adjusting lever 11, crossover sub 12, cylinder body dust ring 13, cylinder body adjustment cover 14, rubber sleeve 15, one-level hydraulic cylinder body 16, first stage piston bar 17, cylinder body connecting rod 18, second piston rod 19, two-stage hydraulic cylinder cylinder body 20, hydraulic cylinder sealing cover 21, expansion cone connecting rod 22, expansion cone 23 and hold-down nut 24 compositions.Be divided into hydraulic cylinder body assembly, piston rod and expansion cone assembly and expansion tube and anchor assembly three parts, hydraulic cylinder body assembly and piston rod and expansion cone assembly have constituted the bloat tool string of the instrument of barefoot interval expansion sleeve again.
The formation of hydraulic cylinder body assembly: go up tubing coupling 1 lower end and promote connecting rod 2 upper ends through being threaded.Promoting connecting rod 2 lower ends links to each other through inner oil tube box cupling 10 with crossover sub 12 upper ends.Crossover sub 12 lower ends are threaded with cylinder body adjustment cover 14 upper ends; Cylinder body dust ring 13 is enclosed within crossover sub 12 lower ends and adjusts cover 14 upper ends near cylinder body; Inner surface at the cylinder body adjustment cover 14 that matches with first stage piston bar 17 external surfaces has seal groove, and sealing ring is installed in the seal groove.Cylinder body adjustment cover 14 lower ends are threaded with one-level hydraulic cylinder body 16 upper ends; 1. piston stroke termination place on one-level hydraulic cylinder body 16 has 1 steam vent, and 2. the piston lower end of piston stroke termination place on one-level hydraulic cylinder body 16 has 2 discharge orifices.One-level hydraulic cylinder body 16 lower ends are threaded with cylinder body connecting rod 18 upper ends, and cylinder body connecting rod 18 upper end external surfaces and lower end inner surface have seal groove, and sealing ring is installed in the seal groove.Cylinder body connecting rod 18 lower ends are threaded with two-stage hydraulic cylinder cylinder body 20 upper ends, and 4. piston stroke termination place on two-stage hydraulic cylinder cylinder body 20 has steam vent.Two-stage hydraulic cylinder cylinder body 20 lower ends are threaded with hydraulic cylinder sealing cover 21, and hydraulic cylinder sealing overlaps 21 upper end external surfaces and the lower end inner surface has seal groove, and sealing ring is installed in the seal groove.
The formation of piston rod and expansion cone assembly: piston dust ring 9 is enclosed within piston adjusting lever 11 upper ends, and with piston adjusting lever 11 relative fixed.Piston adjusting lever 11 lower ends are threaded with first stage piston bar 17 upper ends, on the external surface of the first stage piston bar 17 that matches with one-level hydraulic cylinder body 16 inner surfaces, seal groove are arranged, and sealing ring is installed in the seal groove, and 3. first stage piston bar 17 also has discharge orifice.First stage piston bar 17 lower ends are threaded with second piston rod 19 upper ends, on the external surface of the second piston rod 19 that matches with two-stage hydraulic cylinder cylinder body 20 inner surfaces, seal groove are arranged, and sealing ring is installed in the seal groove, and 5. second piston rod 19 also has discharge orifice.Second piston rod 19 lower ends are threaded with expansion cone connecting rod 22 upper ends, and expansion cone connecting rod 22 has blind hole along central axis, and body of rod external surface has the shoulder of protrusion with fixed expansion awl 23.Expansion cone 23 is enclosed within the lower end of expansion cone connecting rod 22 and abuts against the shoulder lower end of expansion cone connecting rod 22, and expansion cone 23 adopts a kind of alloy steel processing and manufacturing, has higher surface hardness.Hold-down nut 24 be installed in expansion cone connecting rod 22 lower ends and near expansion cone 23 lower ends with the locking expansion cone 23, hold-down nut 24 lower ends are furnished with circlip for shaft with locking.
The formation of expansion tube and anchor assembly: spring base 3 is threaded with spring housing 6 upper ends.Spring housing 6 lower ends are connected through shear pin 7 with expansion sleeve 8 upper ends, and spring housing 6 lower inner surface are that to have tapering be 5 ° inclined-plane.The external surface of wedge 5 is the inclined-planes that have identical tapering with spring housing 6 lower inner surface, and the inner surface of wedge 5 has anti-slop serrations.Wedge 5 is installed in spring housing 6 lower inside, and the external surface of wedge 5 is close to spring housing 6 lower inner surface.The every separated 130mm of expansion sleeve 8 external surfaces overlaps 15 apart from vulcanized rubber, and rubber sleeve 15 can make the better adaptability of 8 pairs of bore hole boreholes wall of expansion sleeve, strengthens the stickiness of 8 pairs of bore hole boreholes wall of expansion sleeve.
Being 9 of 11.05mm at wall thickness
5/
8" be lowered to 8 in the sleeve pipe
1/
2" the bore hole well of drill bit and reaming hole to 228～230mm is that example (is consulted Fig. 3 a), explained how this tool system uses.
During construction, can be earlier with the last tubing coupling 1 of oil pipe fastening means system or with drilling rod connect crossover sub the last tubing coupling 1 of fastening means system the kit system is lowered to this bore hole well.Connect and to inject clear water behind high-pressure pump and the high pressure line on ground and suppress the expand tube operation.When suppressing; 3. clear water gets into the space between cylinder body connecting rod 18 and the first stage piston bar 17 through the discharge orifice on the first stage piston bar 17; 5. clear water gets into the space between hydraulic cylinder sealing cover 21 and the second piston rod 19 through the discharge orifice on the second piston rod 19 simultaneously; Thereby promote hydraulic cylinder body assembly and piston rod and the relative motion of expansion cone assembly, the hydraulic cylinder body assembly has downward movement tendency, and piston rod and expansion cone assembly have movement tendency upwards.But, owing in expansion tube and anchor assembly, adopted design, make the downward movement tendency of hydraulic cylinder body assembly be prevented from, so the bloat tool string of this tool system only has movement tendency upwards with wedge 5.When the pressure of the clear water that injects reaches 25MPa, piston rod and expansion cone assembly will move upward, and be that the expansion cone 23 of 218mm is expanded to external diameter 228mm with expansion sleeve 8 and is fitted on the bore hole borehole wall thereby make external diameter.Consult shown in Fig. 3 b, the structure of two-stage cylinder is adopted in the design of this bloat tool string, and making the bulbs of pressure is 25MPa.If cancellation cylinder body connecting rod 18, second piston rod 19 and two-stage hydraulic cylinder cylinder body 20; Simultaneously with the bottom lengthening of one-level hydraulic cylinder body 16, the top lengthening of first stage piston bar 17; And make that one-level hydraulic cylinder body 16 lower ends and hydraulic cylinder sealing cover 21 is threaded, first stage piston bar 17 lower ends are threaded with expansion cone connecting rod 22 upper ends; The structure that will become first-stage cylinder of bloat tool string then, thus the bulbs of pressure become and are 50MPa.Vice versa increases the progression of cylinder, thereby the bulbs of pressure are diminished.
Inject clear water constantly, and keep 25MPa, piston rod and expansion cone assembly can be with the distances of expansion sleeve 8 expansion 800mm, and this distance equals the stroke of piston rod in hydraulic cylinder body.When piston rod and expansion cone assembly move to the position shown in Fig. 2 a, Fig. 2 b and Fig. 2 c; 2. the high pressure clear water can flow out hydraulic cylinder body from the discharge orifice on the one-level hydraulic cylinder body 16; This moment, tool system can't be kept high pressure, and the bloat tool string has been accomplished an expansion stroke, termination of pumping pressure release.
This tool system can carry out the expand tube operation of a plurality of expansion strokes.Shown in accompanying drawing 2a, Fig. 2 b and Fig. 2 c, when the expand tube end of job of an expansion stroke, expansion sleeve 8 existing parts are swollen to be close to keeps static on the bore hole borehole wall.At this moment, on carry the bloat tool string because expansion sleeve 8 blocks expansion cone 23, so piston rod and expansion cone assembly can't move upward.Simultaneously; Because the wedge 5 in expansion tube and the anchor assembly can only limit the hydraulic cylinder body assembly and move downward; Can not limit the hydraulic cylinder body assembly and move upward, therefore when on when carrying the bloat tool string hydraulic cylinder body assembly can move up to hydraulic cylinder body assembly piston rod and the relative position of expansion cone assembly shown in accompanying drawing 1a, Fig. 1 b and Fig. 1 c.At this moment, turn on pump continues to inject the high pressure clear water, can accomplish next expansion stroke.So repeated multiple times can all expand expansion sleeve 8 and accomplish.
When expansion sleeve 8 all expands completion, carry the bloat tool string in the continuation, inner oil tube box cupling 10 will promote spring housing 6 has the upwards trend of motion; When on carry the bloat tool string upper lifting force when reaching 50KN; Shear pin 7 is cut off, and carries the bloat tool string in the continuation and can tool system be tripped out well head, only stays the expansion sleeve 8 that is swollen and is close on the bore hole borehole wall; This moment, the well latus rectum was 220mm, well latus rectum loss 2mm.So far, the construction operation of using this tool system finishes, and can carry out follow-up construction operation according to drilling design, for example can continue to be lowered to 8
1/
2" drill bit, 7 " casing cementings.
Claims (14)
1. the instrument of a barefoot interval expansion sleeve is characterized in that: mainly be made up of last tubing coupling, lifting connecting rod, spring base, spring, wedge, spring housing, shear pin, expansion sleeve, piston dust ring, inner oil tube box cupling, piston adjusting lever, crossover sub, cylinder body dust ring, cylinder body adjustment cover, rubber sleeve, one-level hydraulic cylinder body, first stage piston bar, cylinder body connecting rod, second piston rod, two-stage hydraulic cylinder cylinder body, hydraulic cylinder sealing cover, expansion cone connecting rod, expansion cone and hold-down nut; Be divided into hydraulic cylinder body assembly, piston rod and expansion cone assembly and expansion tube and anchor assembly three parts.
2. the instrument of barefoot interval expansion sleeve according to claim 1 is characterized in that: the structure of hydraulic cylinder body assembly is to go up the tubing coupling lower end and promote the connecting rod upper end through being threaded; Promoting the connecting rod lower end links to each other through the inner oil tube box cupling with the crossover sub upper end; The crossover sub lower end is threaded with cylinder body adjustment set upper side; Cylinder body adjustment cover lower end is connected with one-level hydraulic cylinder body upper end; One-level hydraulic cylinder body lower end is connected with cylinder body connecting rod upper end; Cylinder body connecting rod lower end is connected with two-stage hydraulic cylinder cylinder body upper end, and two-stage hydraulic cylinder cylinder body lower end is connected with the hydraulic cylinder sealing cover.
3. the instrument of barefoot interval expansion sleeve according to claim 2; It is characterized in that: piston stroke termination place on the one-level hydraulic cylinder in the hydraulic cylinder body assembly and the cylinder body of two-stage hydraulic cylinder has steam vent, and the piston lower end of piston stroke termination place on the one-level hydraulic cylinder body has discharge orifice.
4. the instrument of barefoot interval expansion sleeve according to claim 2; It is characterized in that: the one-level hydraulic cylinder in the hydraulic cylinder body assembly and the hydraulic cylinder sealing set upper side external surface of two-stage hydraulic cylinder and lower end inner surface have seal groove, and sealing ring is installed in the seal groove.
5. the instrument of barefoot interval expansion sleeve according to claim 2; It is characterized in that: in the hydraulic cylinder body assembly; The cylinder body dust ring is enclosed within the crossover sub lower end and adjusts the set upper side near cylinder body; Inner surface at the cylinder body adjustment cover that matches with the first stage piston rod outer surface has seal groove, and sealing ring is installed in the seal groove.
6. the instrument of barefoot interval expansion sleeve according to claim 1; It is characterized in that: piston rod is that piston adjusting lever lower end is connected with first stage piston bar upper end with the formation of expansion cone assembly; First stage piston bar lower end is connected with the second piston rod upper end; The second piston rod lower end is connected with expansion cone connecting rod upper end, and the expansion cone connecting rod has blind hole along central axis, and body of rod external surface has the shoulder of protrusion to bore with fixed expansion.
7. the instrument of barefoot interval expansion sleeve according to claim 6 is characterized in that: in piston rod and the expansion cone assembly, the piston dust ring is enclosed within piston adjusting lever upper end, and with piston adjusting lever relative fixed.
8. the instrument of barefoot interval expansion sleeve according to claim 6; It is characterized in that: in piston rod and the expansion cone assembly; On the external surface of the first stage piston bar that matches with one-level hydraulic cylinder body inner surface, seal groove is arranged; Sealing ring is installed in the seal groove, and the piston lower end of first stage piston bar also has discharge orifice; On the external surface of the second piston rod that matches with the two-stage hydraulic cylinder inner surface of cylinder block, seal groove is arranged, sealing ring is installed in the seal groove, the piston lower end of second piston rod has discharge orifice.
9. the instrument of barefoot interval expansion sleeve according to claim 6 is characterized in that: in piston rod and the expansion cone assembly, expansion cone is enclosed within the lower end of expansion cone connecting rod and abuts against the shoulder lower end of expansion cone connecting rod; Expansion cone is in expansion sleeve bottom, and the part of expansion cone is in outside the expansion sleeve, and the maximum outside diameter of expansion cone equals the maximum outside diameter of expansion tube; Expansion cone adopts a kind of alloy steel processing and manufacturing, has higher surface hardness; Hold-down nut be installed in expansion cone connecting rod lower end and near the expansion cone lower end with the locking expansion cone, the hold-down nut lower end is furnished with circlip for shaft with locking.
10. the instrument of barefoot interval expansion sleeve according to claim 1 is characterized in that: expansion tube is that spring base is connected with the spring housing upper end with the formation of anchor assembly; Spring housing lower end and expansion sleeve upper end is connected, and the spring housing lower inner surface is that to have tapering be 5 ° inclined-plane.
11. the instrument of barefoot interval expansion sleeve according to claim 10 is characterized in that: in expansion tube and the anchor assembly, the spring housing lower end is connected through shear pin with the expansion sleeve upper end.
12. the instrument of barefoot interval expansion sleeve according to claim 10 is characterized in that: in expansion tube and the anchor assembly, wedge is installed in the spring housing lower inside, and the external surface of wedge is close to the spring housing lower inner surface; The external surface of wedge is the inclined-plane that has identical tapering with the spring housing lower inner surface, and the inner surface of wedge has anti-slop serrations.
13. the instrument of barefoot interval expansion sleeve according to claim 10; It is characterized in that: in expansion tube and the anchor assembly; The expansion sleeve external surface whenever at a distance from 120～150mm apart from the vulcanized rubber cover; Rubber sleeve makes the better adaptability of expansion sleeve to the bore hole borehole wall, strengthens the stickiness of expansion sleeve to the bore hole borehole wall.
14. the instrument of barefoot interval expansion sleeve according to claim 10; It is characterized in that: it is inner that piston rod and expansion cone assembly are installed in the hydraulic cylinder body assembly; The two has constituted the bloat tool string of the instrument of barefoot interval expansion sleeve piston rod and expansion cone assembly, and the bloat tool string is installed in expansion tube and anchor assembly inside and is used for the expansion sleeve that expands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220177469 CN202596633U (en) | 2012-04-24 | 2012-04-24 | Tool for expandable casing in open hole section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220177469 CN202596633U (en) | 2012-04-24 | 2012-04-24 | Tool for expandable casing in open hole section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202596633U true CN202596633U (en) | 2012-12-12 |
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ID=47314180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220177469 Expired - Fee Related CN202596633U (en) | 2012-04-24 | 2012-04-24 | Tool for expandable casing in open hole section |
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| Country | Link |
|---|---|
| CN (1) | CN202596633U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635322A (en) * | 2012-04-24 | 2012-08-15 | 中国石油天然气集团公司 | Tool for expandable casing in open hole section |
| CN108240205A (en) * | 2016-12-24 | 2018-07-03 | 中石化石油工程技术服务有限公司 | Down-hole casing twin-stage bores expansion device and its operational method |
| CN114378205A (en) * | 2021-12-15 | 2022-04-22 | 西南石油大学 | Expansion pipe manufacturing rack with built-in expansion cone and naked eye expansion tool and process thereof |
| WO2023245944A1 (en) * | 2022-06-20 | 2023-12-28 | 中国石油天然气集团有限公司 | Drill pipe with cable and manufacturing method therefor |
-
2012
- 2012-04-24 CN CN 201220177469 patent/CN202596633U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635322A (en) * | 2012-04-24 | 2012-08-15 | 中国石油天然气集团公司 | Tool for expandable casing in open hole section |
| CN102635322B (en) * | 2012-04-24 | 2014-10-15 | 中国石油天然气集团公司 | Tool for expandable casing in open hole section |
| CN108240205A (en) * | 2016-12-24 | 2018-07-03 | 中石化石油工程技术服务有限公司 | Down-hole casing twin-stage bores expansion device and its operational method |
| CN108240205B (en) * | 2016-12-24 | 2023-09-12 | 中石化石油工程技术服务有限公司 | Underground casing two-stage cone expansion device and operation method thereof |
| CN114378205A (en) * | 2021-12-15 | 2022-04-22 | 西南石油大学 | Expansion pipe manufacturing rack with built-in expansion cone and naked eye expansion tool and process thereof |
| CN114378205B (en) * | 2021-12-15 | 2023-10-03 | 西南石油大学 | Expansion pipe manufacturing bench with built-in expansion cone, and naked eye expansion tool and technology thereof |
| WO2023245944A1 (en) * | 2022-06-20 | 2023-12-28 | 中国石油天然气集团有限公司 | Drill pipe with cable and manufacturing method therefor |
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