CN205477488U - Diameter -variable jack rabbit - Google Patents
Diameter -variable jack rabbit Download PDFInfo
- Publication number
- CN205477488U CN205477488U CN201620258823.9U CN201620258823U CN205477488U CN 205477488 U CN205477488 U CN 205477488U CN 201620258823 U CN201620258823 U CN 201620258823U CN 205477488 U CN205477488 U CN 205477488U
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- China
- Prior art keywords
- mandrel
- jack rabbit
- spring
- pin
- telescopic head
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- Expired - Fee Related
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Abstract
The utility model belongs to the technical field of downhole tool, concretely relates to diameter -variable jack rabbit, including the body with place the dabber of body in, the body surface be the scroll structure, has evenly arranged the multiunit head that stretch out and draw back along the circumferencial direction on the scroll, dabber upper portion cover has spring and spring holder, dummy piston is installed to the lower part, the middle part is provided with the cyclic annular convex structure of multiunit, flexible head is corresponding one by one with the position of cyclic annular boss, installs spring backing pin in the helicla flute offered on the body, notes oil plug is first and prevent scurrying the round pin, body, dabber, spring backing pin, flexible head, annotate the oil plug head, dummy piston surrounds and forms sealed chamber. Flexible head is in installing condition before the turn on pump, and flexible head is closely laminated with annular boss, and hinder or when meeting the card, accessible ground turn on pump makes flexible head withdraw the jack rabbit unfreezing in case the jack rabbit is met to rotatory drilling string utilizes fixed stabilizer to abolish the wall of a well to hinder a little, the utility model discloses specially adapted straight well section improves the work efficiency of drifting operation greatly.
Description
Technical field
This utility model belongs to Petroleum Down-hole Tool technical field, is specifically related to a kind of reducing type jack rabbit.
Background technology
The main purpose of drifting operation is to check that pit shaft is the most unimpeded, and for entering various downhole tool under smoothly, instrument is prepared, and is a kind of pit shaft detection method easy, efficient.
During oil drilling, underground work, when carrying out drifting operation before well logging, setting of casing, lower instrument, appearance due to situations such as irregular, the saline bed undergauges of well track, conventional drifting BHA easily occurs being hampered, meeting card equivalent risk in decentralization process, even cause bigger down-hole accident, reduce production efficiency.
Conventional drifting instrument is jack rabbit, jack rabbit is the specific purpose tool for detecting downhole tubular thing latus rectum size, latus rectum size whether conformance with standard mainly for detection of endoporus such as sleeve pipe, oil pipe, drilling rods, it is the conventional detection instrument of underground work, point run through casing size rule and oil pipe, the big class of drilling rod jack rabbit two.
Such as patent application CN203769698 U, disclose and use drilling tool drift diameter device under a kind of deep well, including fixing pipe nipple, the recovery seat being arranged in fixing pipe nipple and jack rabbit, sealed by sealing ring between described fixing pipe nipple and recovery seat, it is shaped with on described jack rabbit is axial and runs through circulation port, described jack rabbit sidewall is shaped with sidewall circulation through hole, described jack rabbit one end is provided with projective table type fishing head, the other end at jack rabbit is shaped with the outer chamfering scraping body being easy to reclaim, and described recovery seat upper end is shaped with the interior chamfering scraping body that chamfering scraping body outer with jack rabbit coordinates.
BHA before deepwater drilling latus rectum operation, first it is connected reclaiming pipe nipple with the BHA foot needing latus rectum entering well, fixing pipe nipple is threadeded with top drilling tool, lower drilling tool by top rod button, bottom drilling rod button, before the construction operation needing drilling tool latus rectum pulls out of hole for the last time, in drilling tool, jack rabbit is thrown in from well head, jack rabbit passes through drilling tool internal diameter, mud can be from the space cycle of jack rabbit axial circulation hole and jack rabbit with drilling well internal diameter annular space, do not interfere with shaft bottom circulation, disposably lead to whole drilling tool.
When jack rabbit passes to bottom drilling tool, jack rabbit falls and is reclaiming on pipe nipple, reclaims the chamfering scraping body outer with jack rabbit of the interior chamfering scraping body on seat and coordinates recovery；Described recovery seat realizes sealing by sealing ring and fixing pipe nipple, and mud can only not interfere with shaft bottom circulation from the space cycle in jack rabbit axial circulation hole, and such jack rabbit can together trip out well head with reclaiming pipe nipple, meets the requirement that pulls out of hole normally.
nullPatent application CN 103556968 A，Disclose one once full well drill string jack rabbit，Including columned jack rabbit main body、Tether union joint、Steel wire rope and union joint fixed mount，Wherein，Described jack rabbit main body 1 internal diameter is 0.7-0.8 with the ratio d/D of external diameter，To ensure wall thickness and the intensity of jack rabbit，Make it be hardly damaged，Simultaneously，It has the perforation of its upper and lower end face through，Make jack rabbit in dropping process in drill string liquid can pass through inside jack rabbit，Improve the falling speed of jack rabbit，Additionally，Jack rabbit main body lower end is provided with the chamfering scraping body that angle of inclination is 45 °，Ensure that jack rabbit is the most descending in drill string，And be not easy in drilling rod to stop，Finally，The union joint fixed mount being welded by fixing taeniae and fixing horizontal stripe decussation is welded on jack rabbit main body upper end，The upper surface of this fixing taeniae and the upper surface of fixing horizontal stripe all flush with the upper section of jack rabbit main body，Tether union joint is welded on this union joint fixed mount center，And one end of steel wire rope 5 ties up on described tether union joint，The external diameter of this steel wire rope is 1.5mm，Its length 2m longer than cylindrical drill bar，Make enough length steel wire rope can be held and jack rabbit is taken out.
Before the perforating job and sand control treatment of completion phase, after sleeve pipe pipe cleaning, clean-out service terminate, hold the steel wire rope of jack rabbit main body upper end, in drill string, throw in drill string jack rabbit from rig floor, slowly steel wire rope is put into, after steel wire rope is completely into drilling rod, steel wire rope is straight condition, now, the hands leading steel wire rope is unclamped, jack rabbit freely falls, and has disposably led to whole drilling tool.When passing to bottom drilling tool, jack rabbit falls on drill bit, when drill string trips out, jack rabbit can trip out with drill bit, when last cylindrical drill bar is sitting in turntable surface, steel wire rope can be held jack rabbit is taken out, complete latus rectum, making the time of saving dismounting drill bit, follow-up perforation and sand control treatment drill string can latus rectums again.
Patent application CN203321397U, discloses a kind of slide block type anti-sticking drift size gauge tool, is made up of top connection, drift size gauge tool body, the first pin, bolt, wedge-shaped slot, the first slide block, the second slide block, outage and the second pin.Having centre bore, drift size gauge tool body and top connection to be processed into one on body, top connection has oil pipe female thread to buckle, it is possible to be connected with oil pipe.Wedge key is had on drift size gauge tool body and the second slide block, wedge-shaped slot is had on first slide block, the wedge key of drift size gauge tool body and the wedge-shaped slot of the first slide block are connected, the wedge key of the second slide block and the wedge-shaped slot of the first slide block are connected, first slide block connects drift size gauge tool body by bolt, having the first pin to be connected between first slide block with drift size gauge tool body, the first slide block has outage, has the second pin to connect between the second slide block and the first slide block.
Drift size gauge tool enter well normally work time, drift size gauge tool body, the first slide block, the second slide block be combined into a cylinder, and the effect of bolt is to stop drift size gauge tool body and the disengaging of the first slide block.When drift size gauge tool meets card, by upper lifting pipe post, cut off pin and pin, first slide block is relative to drift size gauge tool body slide downward, second slide block relative to the first slide block slide downward, and, the first slide block and the second slide block are also radially sliding while sliding axially, so that drift size gauge tool entirety undergauge, release bit freezing.
Patent application CN202882825U, discloses a kind of low water resistance hole gauge, including top connection and body；Top connection lower end connects body, and body outer surface has three helicla flutes, and spiral fluted inclination angle is 45 °, and groove depth is 12mm, and helicla flute is longitudinally provided with skiving blade, and body lower end is designed with female thread.
During use, at this utility model top connected pipes, when carrying out drifting operation, in well, liquid or viscous crude can be circulated by the helicla flute on body, and this just substantially reduces resistance when removing drifting tubing string, it is to avoid excessive surge pressure.When using this utility model sand washing on a small scale, sand cleaning fluid can be flowed by helicla flute, and circulation area increases, and liquid flowing resistance diminishes, and reduces the risk of bit freezing.Longitudinally there is skiving blade additionally, due to helicla flute, the shaving effect to sleeve pipe can be strengthened.
Drift size gauge tool recited above, when in use, there is weighted lever general connection, to increase drift size gauge tool quality, improves the ability scraping dirt.In operation, drift size gauge tool is put into Wellbore of Gas Wells, under rope control, rely on self gravitation at the uniform velocity to fall, strike off tubing wall attachment dirt, dredge gas well oil pipe space.
But in implementation process, the impurity such as greasy dirt, dirt stain easily gathers, is blocked in the oil pipe annular space with drift size gauge tool, reduces gas actual internal area, increases drift size gauge tool whereabouts resistance, jam phenomenon occurs.And the above patent is for this problem, can not efficiently solve, conventional drifting BHA easily occurs being hampered, meeting card equivalent risk in decentralization process, even causes bigger down-hole accident, reduces production efficiency.
Summary of the invention
The purpose of this utility model is to overcome conventional drifting BHA in prior art easily to occur being hampered, meeting the problems such as card in decentralization process, provide a kind of reducing type jack rabbit, it is connected to built-in stabilizer front end in drifting BHA, after in drilling tool decentralization process, first reducing type jack rabbit is hampered or meets card, turn on pump circulates, reducing type jack rabbit unfreezing, rotation drilling tool utilizes fixed regulator to carry out expanding a stroke borehole wall, abolishing shoulder, elimination borehole wall resistance point, prevents whole drilling tool bit freezing.
nullThe technical solution of the utility model there is provided a kind of reducing type jack rabbit，Including body and be placed in the mandrel in the middle part of body，It is characterized in that: described body outer surface is scroll structure，Evenly distributed in the circumferential direction on scroll organize telescopic head more，Described mandrel top is cased with spring and spring base，The bottom of mandrel is provided with dummy piston，The middle part of mandrel is provided with many group annular boss structures，Often group telescopic head is the most corresponding with the position of annular boss，Helicla flute it is further opened with on body，And once mounting has spring backing pin from top to bottom、Oiling plug and anti-channeling pin，The spring base being socketed on mandrel top is fixed on described spring backing pin，It is socketed on the dummy piston of mandrel bottom between described oiling plug and anti-channeling pin，Described body、Mandrel、Spring backing pin、Telescopic head、Oiling plug、Dummy piston surrounds formation annular seal space.
The top of described mandrel is provided with jump ring, is provided with nozzle between jump ring and spring.
The bottom of described mandrel is positioned at the bottom of anti-channeling pin equipped with anti-channeling cap, anti-channeling cap.
Described annular boss top is provided with tapering, and the conical surface is 0 °-0 ° with the angle of axis.
Hydraulic oil 0 it is full of in described annular seal space.
Between described mandrel and body, between spring backing pin and body, between telescopic head and body, between oiling plug and body, between dummy piston and body, between dummy piston and mandrel, between anti-channeling pin and body, it is provided with O RunddichtringO.
Described telescopic head is connected to front end, fixed regulator, and the external diameter after telescopic head stretches out is identical with fixed regulator external diameter.
The beneficial effects of the utility model:
1, this utility model simple in construction, dependable performance, body uses monolithic construction, it is ensured that the intensity of body, thus ensure that the safety of whole BHA.
2, the middle part of this utility model mandrel is provided with many group annular boss structures, and be axially evenly arranged along body, when being in installment state, this annular boss of telescopic head and core fits tightly, ensure that effectively contacting between this utility model with the borehole wall, enough annular space area of passages, in turn ensure that this utility model can carry out reducing.
3, telescopic head of the present utility model is connected to front end, fixed regulator, external diameter after telescopic head stretches out is identical with the external diameter of fixed regulator, if any resistance point in drilling tool decentralization process, this utility model first and hinders point cantact, after the turn on pump of ground, telescopic head is retracted under the effect with wall contact force, rotates drill string, abolish resistance point, it is to avoid whole BHA bit freezing.This utility model is after the termination of pumping of ground, and mandrel is up under acting in spring, and ejects telescopic head reset, making this utility model return to installment state, this utility model is repeatable to be opened, termination of pumping action, carries out front and " visits resistance ", after finding resistance point, fixed regulator is utilized to abolish resistance point.
5, the spring force needed for spring of the present utility model can reset according to telescopic head is replaced, and nozzle of the present utility model can be replaced according to circulation discharge capacity and required pressure extent.
6, this utility model is according to abrasion, the situation of erosion degree, repeatable utilization.
Below with reference to accompanying drawing, this utility model is described in further details.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Description of reference numerals: 1-body, 2-jump ring, 3-nozzle, 4-O RunddichtringO, 5-spring, 6-mandrel, 7-spring base, 8-spring backing pin, 9-helicla flute, 10-hydraulic oil, 11-telescopic head, 12-annular boss, 13-oiling plug, 14-dummy piston, 15-anti-channeling pin, 16-anti-channeling cap.
Detailed description of the invention
Embodiment 1:
In drifting operation process, due to the appearance of the situations such as well track is irregular, saline bed undergauge, conventional drifting BHA easily occurs being hampered, meeting card equivalent risk in decentralization process, even causes bigger down-hole accident, production efficiency reduces, and affects gas well and normally produces.
nullFor above-mentioned problem，This utility model provides a kind of reducing type jack rabbit，As shown in Figure 1，Including body 1 be placed in the mandrel 6 in the middle part of body 1，It is characterized in that: described body 1 outer surface is scroll structure，Evenly distributed in the circumferential direction on scroll have many group telescopic heads 11，Described mandrel 6 top is cased with spring 5 and spring base 7，The bottom of mandrel 6 is provided with dummy piston 14，The middle part of mandrel 6 is provided with many group annular boss 12 structures，Often group telescopic head 11 is the most corresponding with the position of annular boss 12，Helicla flute 9 it is further opened with on body 1，And once mounting has spring backing pin 8 from top to bottom、Oiling plug 13 and anti-channeling pin 15，The spring base 7 being socketed on mandrel 6 top is fixed on described spring backing pin 8，It is socketed on the dummy piston 14 of mandrel 6 bottom between described oiling plug 13 and anti-channeling pin 15，Described body 1、Mandrel 6、Spring backing pin 8、Telescopic head 11、Oiling plug 13、Dummy piston 14 surrounds formation annular seal space，Hydraulic oil 10 it is full of in annular seal space，
The top of described mandrel 6 is provided with jump ring 2, is provided with nozzle 3 between jump ring 2 and spring 5.
When carrying out drifting operation, telescopic head 11 described in the utility model is connected to front end, fixed regulator, external diameter after telescopic head 11 stretches out is identical with fixed regulator external diameter, in drifting going down process, if any resistance point, this utility model can meet with resistance point prior to fixed regulator, and ground staff can judge to be hampered situation in time, can prevent the generation of lock of tool drilling.
After finding resistance point, ground turn on pump can be passed through, after drilling fluid enters mandrel 6 by nozzle 3, because the cross-sectional area that seals at described mandrel 6 top with body 1 is more than the sealing cross-sectional area of described dummy piston 17 and body 1, mandrel about 6 two ends are promoted to form a pressure reduction, this pressure reduction promotes mandrel 6 descending and compression spring 5, squeezed fluid force feed 10 promotes dummy piston 17 descending simultaneously, telescopic head 11 disengages with mandrel 6, telescopic head 11 is retracted under the effect of the borehole wall, this utility model disengages with borehole wall resistance point, reducing type jack rabbit unfreezing, rotate and slowly transfer drill string, utilize fixed regulator that borehole wall resistance point is abolished.Resistance point carries out abolishing the termination of pumping of rear ground, and mandrel 6 is up under the effect of spring 5, ejects telescopic head 11, and meanwhile, dummy piston 17 is the most up, and this utility model returns to original state.
This utility model is repeatable to be opened, termination of pumping action, carries out front and " visits resistance ", after finding resistance point, utilizes fixed regulator to abolish resistance point, it is to avoid whole BHA bit freezing, it is achieved the purpose of sustainable drifting operation.
Embodiment 2:
On the basis of embodiment 1, this utility model is equipped with many group annular boss 12 structures in the middle part of described mandrel 6, annular boss 12 structure is axially evenly arranged along body, annular boss 12 top is provided with tapering, the conical surface is 20 °-30 ° with the angle of axis, the bottom of mandrel 6 is equipped with anti-channeling cap 16, anti-channeling cap 16 is positioned at the bottom of anti-channeling pin 15, described spring backing pin 8, anti-channeling pin 18 is by mandrel 6, spring 5, spring base 7, anti-channeling cap 20, telescopic head 11 is fixed on installment state, and spring 5 is in pretension compressive state, when being in installment state, often group telescopic head 11 fits tightly with corresponding annular boss 12, telescopic head 11 is in self-locking state under radial force effect, ensure that effectively contacting between this utility model with the borehole wall, enough annular space area of passages；Mandrel 6 is descending compression spring 5 under the differential pressure action that upper and lower two ends are formed, and when making spring 5 be in compressive state, telescopic head 11 and mandrel 6 disengage thus ensure that this utility model can carry out reducing.
During drifting operation, telescopic head 11 described in the utility model meets with the borehole wall or resistance point, the counteracting force produced makes annular boss in the middle part of telescopic head 11 and mandrel 6 be in self-locking state, telescopic head 11 is not retracted, make this utility model under having radially outward force effect, external diameter after telescopic head 11 stretches out is still consistent with fixed regulator external diameter, plays the purpose of " visiting resistance ".
Embodiment 3:
On the basis of embodiment 1, between described mandrel 6 and body 1, between spring backing pin 8 and body 1, between telescopic head 11 and body 1, between oiling plug 13 and body, between dummy piston 14 and body, between dummy piston 14 and mandrel 6, between anti-channeling pin 15 and body 1, it is provided with O RunddichtringO 4.This sealing means not only sealing effectiveness that this utility model is used is good, and is easy to installation and the dismounting of each parts.Spring 5 described in the utility model can be replaced according to the telescopic head 11 required spring force that resets, and nozzle 3 described in the utility model can be replaced according to circulation discharge capacity and required pressure extent.
Exemplified as above is only to illustration of the present utility model, is not intended that the restriction to protection domain of the present utility model, within the every and same or analogous design of this utility model belongs to protection domain of the present utility model.
Claims (7)
- null1. a reducing type jack rabbit，Including body (1) and be placed in body (1) middle part mandrel (6)，It is characterized in that: described body (1) outer surface is scroll structure，Evenly distributed in the circumferential direction on scroll organize telescopic head (11) more，Described mandrel (6) top is cased with spring (5) and spring base (7)，The bottom of mandrel (6) is provided with dummy piston (14)，The middle part of mandrel (6) is provided with organizes annular boss (12) structure more，Often organize telescopic head (11) the most corresponding with the position of annular boss (12)，Helicla flute (9) it is further opened with on body (1)，And once mounting has spring backing pin (8) from top to bottom、Oiling plug (13) and anti-channeling pin (15)，The spring base (7) being socketed on mandrel (6) top is fixed on described spring backing pin (8)，The dummy piston (14) being socketed on mandrel (6) bottom is positioned between described oiling plug (13) and anti-channeling pin (15)，Described body (1)、Mandrel (6)、Spring backing pin (8)、Telescopic head (11)、Oiling plug (13)、Dummy piston (14) surrounds formation annular seal space.
- 2. a kind of reducing type jack rabbit as claimed in claim 1, it is characterised in that: the top of described mandrel (6) is provided with jump ring (2), is provided with nozzle (3) between jump ring (2) and spring (5).
- 3. a kind of reducing type jack rabbit as claimed in claim 1, it is characterised in that: the bottom of described mandrel (6) is positioned at the bottom of anti-channeling pin (15) equipped with anti-channeling cap (16), anti-channeling cap (16).
- 4. a kind of reducing type jack rabbit as claimed in claim 1, it is characterised in that: described annular boss (12) top is provided with tapering, and the conical surface is 20 °-30 ° with the angle of axis.
- 5. a kind of reducing type jack rabbit as claimed in claim 1, it is characterised in that: it is full of hydraulic oil (10) in described annular seal space.
- 6. a kind of reducing type jack rabbit as claimed in claim 1, it is characterized in that: between described mandrel (6) and body (1), between spring backing pin (8) and body (1), between telescopic head (11) and body (1), between oiling plug (13) and body, between dummy piston (14) and body, between dummy piston (14) and mandrel (6), between anti-channeling pin (15) and body (1), it is provided with O RunddichtringO (4).
- 7. a kind of reducing type jack rabbit as claimed in claim 1, it is characterised in that: described telescopic head (11) is connected to front end, fixed regulator, and the external diameter after telescopic head (11) stretches out is identical with fixed regulator external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258823.9U CN205477488U (en) | 2016-03-31 | 2016-03-31 | Diameter -variable jack rabbit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258823.9U CN205477488U (en) | 2016-03-31 | 2016-03-31 | Diameter -variable jack rabbit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205477488U true CN205477488U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620258823.9U Expired - Fee Related CN205477488U (en) | 2016-03-31 | 2016-03-31 | Diameter -variable jack rabbit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205477488U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625972A (en) * | 2016-03-31 | 2016-06-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Variable-diameter drift diameter gauge |
-
2016
- 2016-03-31 CN CN201620258823.9U patent/CN205477488U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625972A (en) * | 2016-03-31 | 2016-06-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Variable-diameter drift diameter gauge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20170331 |