CN210685904U - Easy-to-release milling and fishing integrated device - Google Patents
Easy-to-release milling and fishing integrated device Download PDFInfo
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- CN210685904U CN210685904U CN201921693050.7U CN201921693050U CN210685904U CN 210685904 U CN210685904 U CN 210685904U CN 201921693050 U CN201921693050 U CN 201921693050U CN 210685904 U CN210685904 U CN 210685904U
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- milling
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- spline clutch
- spline
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- 238000003801 milling Methods 0.000 title claims abstract description 129
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 4
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 6
- 241000251468 Actinopterygii Species 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a milling and fishing integrated device with easy releasing of the clamp, which comprises a milling pipe assembly and a retractable fishing pipe column; the sleeve milling pipe assembly comprises a retractable fishing cup, an upper sleeve milling barrel, a spline clutch outer sleeve, a lower sleeve milling barrel, a sleeve milling shoe and sleeve milling teeth which are assembled in an axial sequence, wherein the spline clutch outer sleeve is circumferentially provided with radial pin holes, and four lower spline key tooth grooves are uniformly processed in an inner cavity of the spline clutch outer sleeve; the retractable fishing pipe column comprises a spline clutch mandrel, a fishing extension bar, a retractable fishing spear and a guide shoe. The utility model combines the two working procedures of milling and salvaging into a whole, and only needs to take one working tubular column to realize milling and salvaging of the permanent bridge plug and the packer in the well; when the device is stuck in the fishing process, the fishing cup and the drill rod on the upper part of the fishing cup can be inverted, the high-strength fishing drill rod is put into the inner cavity of the upper sleeve milling barrel and is in buckled connection with the core shaft of the spline clutch, and the unlocking can be vigorously lifted, so that the lifting force for unlocking is effectively improved, and the unlocking success rate is improved.
Description
Technical Field
The utility model belongs to the technical field of oil gas field development and specifically relates to an integrated device is salvaged to easy unfreezing bushing mill suitable for permanent bridging plug, packer bushing mill workover.
Background
At present, in the process of oil field exploration and development, permanent bridge plugs and packers are generally used as tools for well completion, layered oil production, layered measure reconstruction and the like. When the shaft is deepened or the lower layer position needs to be developed and utilized again, the bridge plug or the packer needs to be drilled and milled or fished out firstly, and then the measure operation can be carried out on the oil, gas and water layers on the lower part.
When the permanent bridge plug and the packer are treated, a mode of firstly milling and then fishing is generally adopted at present, and the defect that when fish falls in the milling process, the falling fish moves downwards to impact a lower tool to increase the difficulty due to vibration or slip release; in particular, a well completion pipe string with a permanent packer needs a plurality of processes to finish treatment, and is time-consuming, labor-consuming and difficult to construct. The published patent CN201020665306.6 discloses an oil well bridge plug sleeve milling fishing tool, wherein a bearing is arranged at the top of an inner cavity slip, the structure is complex, the fishing slip adopts a plurality of arc slips, the defects of frangibility and the like exist, but the fishing tool does not have a releasing function; published patent CN200720170377.7 discloses a drillable bridge plug milling fishing tool, which can complete milling fishing at one time, but its fishing slips adopt 6 arc slips, and has the defects of fragility, etc., and its withdrawal system is to break the fishing slips to release the central pipe, even if withdraw the pipe string, it brings difficulties to the follow-up work. In addition, for tubular falling objects in the thin-wall well with a large-outer-diameter fish top, the sleeve milling and slip fishing method in the sleeve milling barrel adopted by the two patents has the risks of difficult treatment, high risk, easy drill jamming and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a milling and fishing integrated device that is applicable to permanent bridging plug, packer milling and well repairing operation and easy to get stuck is provided.
In order to solve the technical problem, the utility model discloses a technical scheme is: a milling and fishing integrated device easy to release a clamp comprises a milling pipe assembly and a retractable fishing pipe column;
the sleeve milling pipe assembly is sequentially provided with a retractable fishing cup, an upper sleeve milling barrel, a spline clutch outer sleeve, a lower sleeve milling barrel, a sleeve milling shoe and sleeve milling teeth from top to bottom in the axial direction; a drill rod female buckle connected with an accompanying drill rod is processed at the upper part of the retreatable fishing cup, a two-stage sleeve male buckle connected with the upper sleeve milling barrel is processed at the lower part of the retreatable fishing cup, and the retreatable fishing cup, the upper sleeve milling barrel, the spline clutch outer sleeve, the lower sleeve milling barrel and the sleeve milling shoe are respectively connected by two-stage buttress thread buckles; the circumference of the spline clutch outer sleeve is provided with radial pin holes, and 4 spline key tooth grooves are uniformly processed in the inner cavity of the spline clutch outer sleeve; sleeve milling teeth are circumferentially paved and welded on the lower part of the outer side of the sleeve milling shoe;
the retractable fishing pipe column is sequentially provided with a spline clutch mandrel, a fishing extension bar, a retractable fishing spear and a guide shoe from top to bottom in the axial direction, wherein the spline clutch mandrel and the fishing extension bar are both positioned in an inner cavity of the sleeve milling pipe assembly; the spline clutch mandrel, the fishing extension rod, the retractable fishing spear and the guide shoe are connected with each other by a drill rod buckle respectively, and the screwing direction of the threads of the spline clutch mandrel is consistent with the milling rotation direction of the milling shoe; the upper part of a core shaft of the spline clutch is provided with a drill rod box connected with a subsequent salvage drill rod, the lower part of the core shaft of the spline clutch is provided with a drill rod pin connected with a salvage extension rod, and the outer side of the core shaft of the spline clutch is respectively provided with 8 upper splines and 4 lower splines;
the salvaging extension bar is provided with a groove corresponding to a radial pin hole on the spline clutch outer sleeve, the radial pin hole and the groove are screwed up through a pin, so that the retractable salvaging pipe column and the sleeve milling pipe assembly are connected into a whole, and a lower spline key tooth groove of an inner cavity of the spline clutch outer sleeve and outer teeth of a spline clutch mandrel are in a clutch state.
The number of the pins for fixing the spline clutch outer sleeve and the fishing extension rod is calculated and determined according to the maximum allowable load of the milling, so that the spline clutch outer sleeve can be cut continuously when the milling operation is met, and the spline clutch outer sleeve can be cut by lifting a proper load when the bridge plug/packer is subsequently fished.
The sleeve milling teeth are made of high wear-resistant hard alloy.
The utility model has the advantages that: the two working procedures of milling and salvaging are combined into a whole, and the milling and salvaging of the permanent bridge plug and the packer in the well can be realized only by pulling up the working pipe column for one time; the method can be used for greatly improving the releasing force, thereby effectively improving the releasing force and the releasing success rate. The utility model has the advantages of simple structure, security height can show improvement efficiency of construction, reduction operating cost.
Drawings
Fig. 1 is a schematic structural view of the milling and fishing integrated device easy to release the jam of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B of fig. 1.
Fig. 4 is a cross-sectional view of fig. 1 taken along line C-C.
Fig. 5 is a schematic structural view of the spline clutch core shaft of the milling and fishing integrated device easy to release the card.
Fig. 6 is a sectional view taken along line a-a of fig. 5.
Fig. 7 is a sectional view taken along line B-B of fig. 5.
Fig. 8 is an expanded view of the splines of fig. 5.
Fig. 9 is a schematic structural view of the spline clutch outer sleeve of the milling and fishing integrated device easy to release the card of the present invention.
Fig. 10 is a cross-sectional view taken along line D-D of fig. 9.
In the figure, I-milling pipe assembly; II, a retractable salvaging pipe column; 1-retreating the fishing cup; 2, sleeving a milling cylinder; 3-spline clutch jacket; 4, sleeving and milling a cylinder; 4-1-pin; 5, sleeving a milling shoe; 6, milling teeth in a set; 7-spline clutch spindle; 8, fishing the extension bar; 9-a retractable fishing spear; and 10, guiding shoes.
Detailed Description
The invention will be further described with reference to the following drawings and specific examples, which are not intended to limit the invention in any way.
As shown in figures 1-10, the milling and fishing integrated device easy to release the jam comprises a milling pipe assembly I and a retractable fishing pipe column II;
the sleeve milling pipe assembly I is sequentially assembled with a retractable fishing cup 1, an upper sleeve milling barrel 2, a spline clutch outer sleeve 3, a lower sleeve milling barrel 4, a sleeve milling shoe 5 and sleeve milling teeth 6 from top to bottom in the axial direction; a drill rod female buckle connected with an accompanying drill rod is processed at the upper part of the retreating bailing cup 1, a two-stage sleeve male buckle connected with the upper milling sleeve 2 is processed at the lower part of the retreating bailing cup 1, and the retreating bailing cup 1, the upper milling sleeve 2, the spline clutch outer sleeve 3, the lower milling sleeve 4 and the milling shoe 5 are connected by the two-stage buckle respectively; the spline clutch outer sleeve 3 is circumferentially provided with radial pin holes, and 4 spline key tooth grooves are uniformly processed in the inner cavity of the spline clutch outer sleeve; the lower part of the outer side of the milling shoe 5 is circumferentially provided with milling teeth 6;
a spline clutch mandrel 7, a fishing extension bar 8, a retractable fishing spear 9 and a guide shoe 10 are sequentially assembled on the retractable fishing pipe column II from top to bottom in the axial direction, wherein the spline clutch mandrel 7 and the fishing extension bar 8 are both positioned in the inner cavity of the sleeve milling pipe assembly I; the spline clutch mandrel 7, the fishing extension bar 8, the retractable fishing spear 9 and the guide shoe 10 are respectively connected by drill bar buckles, and the screwing direction of the threads of the fishing spear is consistent with the milling rotation direction of the milling shoe; the upper part of the spline clutch mandrel 7 is provided with a drill rod box connected with a subsequent salvage drill rod, the lower part of the spline clutch mandrel 7 is provided with a drill rod pin connected with a salvage extension rod 8, and the outer side of the spline clutch mandrel is respectively provided with 8 upper splines and 4 outer teeth of lower splines;
the salvaging extension bar 8 is provided with a groove corresponding to the radial pin hole on the spline clutch outer sleeve 3, and the radial pin hole and the groove are screwed down through the pin 4-1, so that the retractable salvaging pipe column II and the sleeve milling pipe assembly I are connected into a whole. At this time, the spline groove in the inner cavity of the spline clutch outer sleeve 3 and the external teeth of the spline clutch mandrel 7 are in a clutch state.
The number of the pins for fixing the spline clutch outer sleeve 3 and the fishing extension rod 8 is calculated and determined according to the maximum allowable load of the milling, so that the spline clutch outer sleeve can be cut continuously when the milling operation is met, and the spline clutch outer sleeve can be cut by lifting a proper load when the bridge plug/packer is subsequently fished.
The sleeve milling teeth 6 are made of high wear-resistant hard alloy.
Before the on-site use, the assembly of the integrated milling and fishing device is completed according to the description: firstly, connecting the components of a spline clutch mandrel 7, a fishing extension bar 8, a retractable fishing spear 9 and a retractable fishing pipe column II of a guide shoe 10 two by two through screw threads according to a figure 1, and screwing the screw threads through a special screwing machine to ensure that the connection is firm; then connecting the parts of the upper milling sleeve 2, the spline clutch outer sleeve 3, the lower milling sleeve 4 and the milling shoe 5 milling pipe assembly I in pairs through two-stage buttress thread buckles, screwing the thread buckles tightly through a special screwing machine, and firmly connecting, wherein milling teeth 6 are welded on the lower part of the outer side of the milling shoe 5 in the circumferential direction; a retractable fishing pipe column II penetrates through the inner cavity of the upper milling barrel 2, the retractable fishing spear 9 and the guide shoe 10 completely penetrate through the lower end of the milling teeth 6, a groove on the fishing extension bar 8 is aligned with a radial pin hole on the spline clutch outer sleeve 3 through fine adjustment, and the pin 4-1 is screwed up to connect the retractable fishing pipe column II and the milling pipe assembly I into a whole, wherein the number of pins for fixing the spline clutch outer sleeve 3 and the fishing extension bar 8 can be calculated and determined according to the maximum allowable milling load, so that the retractable fishing pipe column II can be cut continuously during milling operation, and the retractable fishing pipe column II can be cut by lifting a proper load during subsequent bridge plug/packer fishing; finally, the retractable fishing cup 1 is screwed on the upper end of the upper sleeve milling barrel 2, and the connection of the easy-releasing type sleeve milling and fishing integrated device is completed.
Aiming at the milling operation of permanent bridge plugs and packers, the basic construction process flow of the operation of the easy-to-release type milling and fishing integrated device is as follows:
1. the integrated device for milling and salvaging the easy-to-release sleeve is delivered to a fish falling position in a well by adopting a delivery pipe column, a pump is started to circulate, pressure is applied to lower the salvaging pipe column, axial drilling pressure required by salvaging is transmitted to a retractable salvaging spear 9 through a connecting part between a sleeve milling pipe assembly I and a retractable salvaging pipe column II, and the retractable salvaging spear is guided by a guide shoe 10 to enter an inner cavity of a bridge plug or a packer to be salvaging and hang and clamp the inner wall of a central pipe thereof;
2. lifting the delivery pipe column to a set tonnage to force the pin connecting the clutch outer sleeve 3 and the salvaging extension bar 8 to be cut off, and separating the retractable salvaging pipe column II from the sleeve milling pipe assembly I;
3. the delivery pipe column is lifted continuously, the retractable fishing pipe column II and the sleeve milling pipe assembly I move relatively, the clutch mandrel 7 moves downwards, the outer teeth of the clutch mandrel are inserted into the clutch outer sleeve 3 and are firmly meshed with the inner cavity, the lifting delivery mechanism does not move upwards, and the fishing spear is firmly hung and clamped on a bridge plug or a packer to be fished;
4. lowering the delivery pipe column to enable the milling teeth at the bottom of the milling shoe 5 to contact the upper surface of the outer part of the central pipe of the bridge plug or the packer to be salvaged, and applying a certain bit pressure to the pipe column to mill the part outside the central pipe of the bridge plug or the packer to be salvaged; at the moment, the clutch mandrel 7 is separated from the clutch outer sleeve 3, the milling torque cannot be transmitted to the retractable fishing pipe column II, and the fishing spear keeps the hanging and clamping state of the fishing bridge plug or the packer unchanged;
5. when the sleeve is milled to the state that the bridge plug or the packer to be salvaged is unlocked, the rest part of the bridge plug or the packer to be salvaged can freely move up and down in the shaft, at the moment, the delivery pipe column is lifted up to enable the retractable salvage pipe column II and the sleeve milling pipe assembly I to move relatively, the clutch mandrel 7 is downwards inserted into the groove in the inner cavity of the clutch outer sleeve 3, and then the lifting force is lifted up to enable the salvage spear to take out the bridge plug or the packer to be salvaged;
6. if the milling teeth are worn until the milling does not have footage but the bridge plug or the packer to be salvaged is not unlocked, the delivery pipe column is lifted upwards at the moment, the milling pipe assembly I goes upwards, the clutch mandrel 7 goes downwards, and the external teeth of the clutch mandrel are inserted into the grooves in the inner cavity of the clutch outer sleeve 3 and are firmly meshed; torque is applied to the ground and is transmitted to the retractable fishing spear at the bottom of the retractable fishing string II through the delivery string and the sleeve milling pipe assembly I, so that the retractable fishing spear 9 is retracted; lifting the delivery pipe column to bring the milling and fishing integrated tool out, replacing the milling shoe 5 on the ground, reassembling the milling and fishing integrated tool, and repeating the steps 1 to 5 to finish fishing of the bridge plug or the packer in the well.
When the sleeve milling mechanism is displayed in the jamming condition in the sleeve milling process, the drilling tool can be lifted up and down within a certain range to perform movable jamming releasing. When the sleeve milling mechanism or the fishing mechanism is completely blocked, the drilling tool can be reversely rotated, the drilling tool is withdrawn from the double-stage buckle reverse buckle at the joint of the withdrawable fishing cup 1 and the upper sleeve milling barrel 2, then a high-strength fishing drill rod is downwards put into the inner cavity of the upper sleeve milling barrel 2 and is in buckled connection with the upper drill rod female buckle of the spline clutch mandrel 7, the releasing construction is carried out, and the releasing success rate is improved.
The above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which should be construed to be within the scope of the claims.
Claims (3)
1. A milling and salvaging integrated device easy to release a clamp is characterized by comprising a milling pipe assembly (I) and a retractable salvaging pipe column (II);
the sleeve milling pipe assembly (I) is sequentially assembled with a retractable fishing cup (1), an upper sleeve milling barrel (2), a spline clutch outer sleeve (3), a lower sleeve milling barrel (4), a sleeve milling shoe (5) and sleeve milling teeth (6) from top to bottom in the axial direction; a drill rod female buckle connected with an accompanying drill rod is processed at the upper part of the retreating bailing cup (1), a two-stage sleeve male buckle connected with the upper sleeve milling barrel (2) is processed at the lower part of the retreating bailing cup, and the retreating bailing cup (1), the upper sleeve milling barrel (2), the spline clutch outer sleeve (3), the lower sleeve milling barrel (4) and the sleeve milling shoe (5) are respectively connected by two-stage buttress thread buckles; the circumference of the spline clutch outer sleeve (3) is provided with radial pin holes, and 4 lower spline key tooth grooves are uniformly processed in the inner cavity of the spline clutch outer sleeve; the lower part of the outer side of the milling shoe (5) is circumferentially provided with milling teeth (6);
a spline clutch mandrel (7), a fishing extension rod (8), a retractable fishing spear (9) and a guide shoe (10) are sequentially assembled on the retractable fishing pipe column (II) from top to bottom in the axial direction, wherein the spline clutch mandrel (7) and the fishing extension rod (8) are both positioned in the inner cavity of the sleeve milling pipe assembly (I); the spline clutch mandrel (7), the fishing extension bar (8), the retractable fishing spear (9) and the guide shoe (10) are respectively connected by drill rod buckles, and the screwing direction of the threads of the fishing spear is consistent with the milling rotation direction of the milling shoe; the upper part of the spline clutch mandrel (7) is provided with a drill rod box connected with a subsequent salvage drill rod, the lower part of the spline clutch mandrel (7) is provided with a drill rod pin connected with a salvage extension rod (8), and the outer side of the spline clutch mandrel is respectively provided with 8 upper splines and 4 outer teeth of lower splines;
a groove corresponding to a radial pin hole in the spline clutch outer sleeve (3) is formed in the fishing extension bar (8), the radial pin hole and the groove are screwed down through a pin (4-1), so that the retractable fishing pipe column (II) and the sleeve milling pipe assembly (I) are connected into a whole, and a lower spline tooth groove in an inner cavity of the spline clutch outer sleeve (3) and outer teeth of the spline clutch mandrel (7) are in a clutch state.
2. The milling and fishing integrated device easy to jam release of claim 1 is characterized in that the number of pins for fixing the spline clutch outer sleeve (3) and the fishing extension rod (8) is calculated and determined according to the maximum allowable milling load, so that the spline clutch outer sleeve can be sheared continuously when in milling operation and can be sheared when lifting a proper load when subsequently fishing a bridge plug/packer.
3. The integrated milling and fishing device with the easy-to-release clamp as claimed in claim 1, wherein the milling teeth (6) are made of high-wear-resistant hard alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921693050.7U CN210685904U (en) | 2019-10-11 | 2019-10-11 | Easy-to-release milling and fishing integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921693050.7U CN210685904U (en) | 2019-10-11 | 2019-10-11 | Easy-to-release milling and fishing integrated device |
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| Publication Number | Publication Date |
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| CN210685904U true CN210685904U (en) | 2020-06-05 |
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| CN201921693050.7U Active CN210685904U (en) | 2019-10-11 | 2019-10-11 | Easy-to-release milling and fishing integrated device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196485A (en) * | 2020-11-11 | 2021-01-08 | 大庆石油管理局有限公司 | Horizontal well is with cover milling tool |
| CN113202437A (en) * | 2021-06-02 | 2021-08-03 | 中石化石油工程技术服务有限公司 | High antitorque cutting ferrule of preventing drags for integration instrument |
| CN114458214A (en) * | 2020-11-18 | 2022-05-10 | 中国海洋石油集团有限公司 | Large-size tail pipe hanger and using method thereof |
-
2019
- 2019-10-11 CN CN201921693050.7U patent/CN210685904U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196485A (en) * | 2020-11-11 | 2021-01-08 | 大庆石油管理局有限公司 | Horizontal well is with cover milling tool |
| CN114458214A (en) * | 2020-11-18 | 2022-05-10 | 中国海洋石油集团有限公司 | Large-size tail pipe hanger and using method thereof |
| CN114458214B (en) * | 2020-11-18 | 2023-09-01 | 中国海洋石油集团有限公司 | Large-size tail pipe hanger and use method thereof |
| CN113202437A (en) * | 2021-06-02 | 2021-08-03 | 中石化石油工程技术服务有限公司 | High antitorque cutting ferrule of preventing drags for integration instrument |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210415 Address after: 300457 Tianjin Binhai New Area Development Zone Second Avenue 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd., No. 83, Second Street, economic and Technological Development Zone, Binhai New Area, Tianjin, 300457 Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |