CN116971743A - Recoverable window sidetracking device capable of repeating operation and implementation method thereof - Google Patents
Recoverable window sidetracking device capable of repeating operation and implementation method thereof Download PDFInfo
- Publication number
- CN116971743A CN116971743A CN202311042525.7A CN202311042525A CN116971743A CN 116971743 A CN116971743 A CN 116971743A CN 202311042525 A CN202311042525 A CN 202311042525A CN 116971743 A CN116971743 A CN 116971743A
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- China
- Prior art keywords
- slip
- mandrel
- locking
- window
- boss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004873 anchoring Methods 0.000 claims abstract description 65
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052742 iron Inorganic materials 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 230000003252 repetitive effect Effects 0.000 claims 2
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 17
- 238000011084 recovery Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion
Abstract
The invention discloses a recoverable window-opening sidetracking device for repeated operation in the oil and gas field and an implementation method thereof. The window sidetracking device can be used for rapidly and repeatedly anchoring and de-anchoring in the pit, can finish window sidetracking operation at a plurality of positions in one trip, greatly improves the window opening efficiency, and can keep the inclined iron seat to only replace the inclined iron surface when the whipstock is replaced, thereby saving the drilling cost.
Description
Technical Field
The invention relates to a recyclable window sidetracking device capable of repeating operation and an implementation method thereof, and belongs to the technical field of underground window sidetracking.
Background
With the continuous promotion of oil gas development and production, the oil gas wells developed in early stage gradually step into the final stage of economic production, and the number of old wells is increased gradually. The method is an important means for improving the oil and gas recovery ratio by drilling the open window side drilling of the old well to recover the peripheral oil and gas reservoirs. The traditional side drilling tool for windowing is a non-recyclable device, once the setting is anchored, the side drilling tool cannot be taken out, and the side drilling tool must be used for milling the side drilling tool, so that the windowing cost is high, the operation risk is high, and even the original well is scrapped.
To solve the problem that the windowing sidetracking tool is not recyclable, a windowing sidetracking tool and a windowing method thereof are disclosed in publication No. CN 107313734B. The hydraulic anchor is characterized in that after the windowing operation is completed, a salvaging tool is adopted to hook and lift a salvaging groove at the top end of the whipstock, under the lifting force of a salvaging hook, a second shear pin between a mandrel and a slip sleeve of the whipstock and the hydraulic anchor is sheared, so that a limiting boss on the mandrel moves upwards, and then the limiting sleeve is driven to move upwards, so that lifting force is applied to a driving sleeve, a slip cone and the slip, under the action of the lifting force, the driving sleeve immediately shears a third shear pin which is blocked by a locking ring and a baffle ring from moving, after the third shear pin is sheared, the driving sleeve and the slip cone immediately move upwards, the slip immediately withdraws inside the slip sleeve, and finally the whipstock and the hydraulic anchor can be salvaged and recovered together.
The sidetracking tool for windowing can realize complete recovery after windowing operation and can be repeatedly put into use after simple treatment. However, after the window side drilling tool completes one window opening operation, the window side drilling tool must start to drill through the replacement of the zero-crossing part before the window side drilling tool can drill down again to perform a secondary window opening operation, the window opening operation time can be greatly increased by repeatedly starting to drill down, and the construction cost is increased. And repeated tripping easily causes damage to the well structure, increases the operation difficulty of sidetrack drilling in windowing, and has higher risk.
Disclosure of Invention
The invention aims to provide a window side drilling device and an implementation method thereof, which can realize complete recovery after window opening operation and can adjust the window opening position according to process requirements to carry out repeated window opening operation after one window opening operation is completed. The invention omits the time of replacing the parts by starting the drill and then entering the secondary window opening position, and has short operation period and wide application range.
The technical scheme of the invention is as follows:
the utility model provides a recoverable window sidetracking device of repeated operation, includes the whipstock and connects the setting anchor at the whipstock lower extreme, its special character lies in: the oblique device is of a hollow structure and is formed by connecting an oblique iron surface and an oblique iron seat through a connecting key and a fastening screw, a through hole for feeding, salvaging and recycling is formed in the oblique iron surface, an internal thread pipe for feeding, salvaging and recycling is arranged right below the through hole at the upper part of the bottom end of the oblique iron seat, a first runner communicated with the internal thread pipe is arranged inside the bottom end of the oblique iron seat, the lower part of the bottom end of the oblique iron seat is connected with the upper end of a setting mandrel of the setting anchoring device through threads and anti-rotation pins, and a second runner communicated with the first runner is arranged inside the setting mandrel; the inner wall of the lower end of the setting mandrel is provided with a first locking boss, and an anti-rotation square groove is formed in the lower end of the setting mandrel; the setting mandrel and the anchoring mandrel are connected through a joint, the upper end of the joint is connected with the lower end of the setting mandrel through a connecting boss, the lower end of the joint is connected with the upper end of the anchoring mandrel through threads, and a limiting spring is arranged between the joint and the locking ring; the anti-rotation square boss matched with the anti-rotation square groove is arranged at the inner part of the upper end of the anchoring mandrel, the second locking boss matched with the first locking boss is arranged on the outer wall of the upper end of the anchoring mandrel, the upper slip cone is sleeved below the second locking boss on the anchoring mandrel, the upper end of the upper slip cone is connected with the lower end of the driving sliding sleeve through threads, the lower slip cone is arranged at the lower end of the anchoring mandrel through threads, the slip sleeve is sleeved between the upper slip cone and the lower slip cone, and the slip is installed in the slip sleeve.
As further preferable, the inclined iron seat and the inclined iron surface are also provided with matched horizontal bearing steps, and the inclined iron surface is made of hard alloy with high hardness and good wear resistance.
As a further preferable mode, the length of the sliding boss of the outer wall of the setting mandrel is 50mm, the length of the sliding groove of the inner wall of the upper end of the locking ring is 100mm, and when the window sidetracking device is in an unanchored state, the distance between the upper end face of the sliding boss of the outer wall of the setting mandrel and the upper end face of the sliding groove of the inner wall of the upper end of the locking ring is 50mm under the action of the limiting spring.
As a further preferable mode, the length of the first locking boss on the inner wall of the lower end of the locking ring and the length of the second locking boss on the outer wall of the upper end of the anchoring mandrel are both 50mm, and when the window sidetracking device is in an unanchored state, the lower end face of the first locking boss on the inner wall of the lower end of the locking ring is aligned with the lower end face of the second locking boss on the outer wall of the upper end of the anchoring mandrel, and the window sidetracking device is circumferentially arranged at 45 degrees.
As a further preference, the outer walls of the upper cone and the lower cone of the slip are respectively provided with 4 first guiding inclined planes which are uniformly distributed in the circumferential direction, 8 square windows are uniformly formed in the slip sleeve, a limiting groove which is used for limiting the slip sleeve to axially move only relative to the anchoring mandrel and not to circumferentially rotate is formed in the outer wall of the slip sleeve, transverse clamping teeth are arranged on the outer surface of the upper portion of the slip, longitudinal clamping teeth are arranged on the outer surface of the lower portion of the slip, second guiding inclined planes which are matched with the first guiding inclined planes of the upper cone and the outer wall of the lower cone of the slip are respectively arranged at the upper bottom of the slip and the lower bottom of the slip, 4 slips are respectively arranged in the 8 square windows of the slip sleeve, and the second guiding inclined planes of the bottom of the 4 slips are respectively arranged on the 8 first guiding inclined planes of the slip cone.
As a further preferable mode, the lower end of the anchoring mandrel is provided with a limit pin hole which is used for limiting the slip sleeve to move only relative to the anchoring mandrel in the axial direction, one end of the limit pin is anchored into the limit pin hole, the other end of the limit pin is positioned in the limit groove, and the width of the limit groove is slightly larger than the outer diameter of the limit pin.
The invention also provides an implementation method of the recyclable window sidetracking device with repeated operation, which comprises the following steps:
(a) Firstly, a lowering tool is rotated clockwise to screw with an inner threaded pipe at the upper part of the bottom end of a wedge seat, a window sidetrack device is lowered to a position which needs window opening operation by the lowering tool for 30mm, then high-pressure slurry is injected into the inner threaded pipe by the lowering tool, the high-pressure slurry transmits pressure to a second flow passage in a setting mandrel through a first flow passage in the bottom end of the wedge seat, the slurry pressure transmits pressure to a driving sliding sleeve through a grouting hole communicated with the second flow passage, when the pressure reaches the acting force of a compression limiting spring, the limiting spring is compressed, the driving sliding sleeve drives a locking ring, a slip upper cone, a slip sleeve and slips to move downwards for 50mm together, 4 slips are supported out of square windows under the action of 8 guide inclined planes of the slip cone and 8 slip sleeve square windows, the upper end face of a first locking boss on the locking ring is axially aligned with the lower end face of a second locking boss at the upper end of the anchoring mandrel, and the upper end of the locking sleeve is tightly anchored on the inner wall of the sleeve, and the upper end of the slip sleeve and the slip sleeve is axially aligned at 45 degrees;
(b) After the slip is anchored successfully, the lowering tool drives the whipstock, the setting mandrel and the locking ring to rotate 45 degrees clockwise, at the moment, a first locking boss on the locking ring and a second locking boss at the upper end of the anchoring mandrel are mutually meshed, so that axial locking is realized, and even if grouting is stopped, the driving sliding sleeve and a slip upper cone connected with the sliding sleeve cannot retract, thereby enabling the slip to be reliably anchored on the inner wall of the casing; after the meshing is finished, the downward tool drives the whipstock and the setting mandrel to move downwards for 30mm, so that the anti-rotation square groove at the lower end of the setting mandrel is matched with the anti-rotation square boss at the upper end of the anchoring mandrel, circumferential anti-rotation locking is realized, the meshed locking bosses cannot rotate mutually, reliable locking and anchoring of the slips are realized, and at the moment, the whipstock and the setting mandrel are locked and cannot rotate circumferentially;
(c) After locking, the lowering tool is rotated anticlockwise, so that the lowering tool is screwed out of the inner threaded pipe at the upper part of the bottom end of the inclined iron seat, the lowering tool is lifted up, and the window drill bit is put into the lower part to perform window sidetracking operation;
(d) After the window opening operation is finished once, the window opening drill bit is lifted up, the lowering tool is put in, the lowering tool is rotated by a homeopathy needle, the lower tool is screwed with an inner threaded pipe at the upper part of the bottom end of the wedge seat, the oblique device and the setting mandrel are lifted up by 30mm after the screwing, the anti-rotation square groove at the lower end of the setting mandrel is separated from the anti-rotation square boss at the upper end of the anchoring mandrel, the locking ring is rotated by 45 degrees clockwise again, the first locking boss on the locking ring and the second locking boss at the upper end of the anchoring mandrel are meshed, and at the moment, the limiting spring rebounds and drives the driving sliding sleeve, the locking ring, the upper cone of the slip and the slip sleeve to move up to the initial position, the slip is retracted into the slip sleeve square window, and the slip is released from the anchor.
(e) After the anchor is broken down, the lower tool drives the window sidetracking device to integrally move to a new window sidetracking position, and the steps (a) - (d) are repeated, so that window sidetracking operation can be repeated, and after all window sidetracking operations are completed, the lower tool is put into, so that all recovery of the window sidetracking device can be realized.
Compared with the prior art, the invention has the following beneficial effects:
(1) The recyclable window-opening sidetracking device adopts the limiting spring to replace the traditional one-time anchoring shear pin, when the mud pressure reaches the acting force of the compression spring, the limiting spring is compressed, the sliding sleeve is driven to drive the locking ring, the upper cone of the slip, the slip sleeve and the slip to move downwards, the slip supports the square window of the slip sleeve to be tightly anchored on the inner wall of the sleeve, the lower tool drives the locking ring to rotate clockwise, so that the locking bosses are mutually meshed, the slip is prevented from being retracted into the square window of the slip sleeve after the pressure supply is stopped, and the stable window-opening operation is realized; after the windowing operation is completed, the tool is lowered to drive the locking ring to rotate clockwise to separate the locking bosses, and the compressed limiting spring is reset to drive the sliding sleeve, the locking ring and the upper cone of the slip to move upwards, the slip is retracted into the square window of the slip sleeve, and the slip is released from the anchor; and then the window sidetracking device is moved to the next window opening position to be operated repeatedly, so that the problem that the once-used anchoring shear pin cannot act secondarily after being sheared is avoided, and the continuous window opening operation without drilling is realized.
(2) According to the recoverable window drilling side drilling device capable of repeating operation, provided by the invention, anchoring and unbinding are realized by adopting a mode of mutually meshing and separating the rotary control locking bosses, the use of traditional anchoring shear nails and unbinding shear nails is eliminated, the risks of false anchoring and false anchor understanding caused by early shearing of the shear nails are avoided, and the safety of window drilling operation is improved.
(3) The whipstock of the recyclable window opening sidetracking device provided by the invention is of a hollow structure, is composed of the wear-resistant chute iron face and the chute iron seat through the connecting key and the fastening screw, has lighter dead weight, less material consumption and more convenient replacement compared with the existing integrated solid whipstock, and can obviously improve the window opening efficiency and reduce the cost.
(4) The recoverable window-opening sidetracking device provided by the invention adopts the axial and circumferential combined integrated slips, the outer surface of the upper part of each slip is provided with the transverse latch, the lower part of each slip can be prevented from sliding downwards after anchoring, the outer surface of the lower part of each slip is provided with the longitudinal latch, the slips can be prevented from rotating after anchoring, and one set of slips not only realizes axial compression resistance, but also realizes circumferential torsion resistance, and simplifies the structure of a slip anchoring unit.
(5) Compared with a salvage groove conventionally arranged on a chute surface, the structure of the recoverable windowed sidetracking device provided by the invention is not damaged in the drilling process of a windowed drill bit, and is fed or salvaged for recovery after screwed by adopting threads, so that the feeding and salvage recovery process is more firmly connected with a tool below, the problem that a conventional salvage tool is unhooked from the salvage groove can be avoided, and the easy recovery of the windowed sidetracking device is realized.
Drawings
FIG. 1 is a cross-sectional view of a three-dimensional structure of the present invention;
FIG. 2 is a schematic view of a three-dimensional structure of the present invention;
FIG. 3 is a schematic three-dimensional structure of a setting mandrel of the present invention;
FIG. 4 is a schematic three-dimensional structure of a locking ring according to the present invention;
FIG. 5 is a schematic representation of the three-dimensional structure of an anchoring mandrel according to the present invention;
FIG. 6 is a cross-sectional view of a three-dimensional structure of the locking device of the present invention when unlocked;
FIG. 7 is a cross-sectional view of a three-dimensional structure of the locking device of the present invention when locked;
FIG. 8 is a schematic representation of the three-dimensional structure of the upper cone of the slip of the present invention;
FIG. 9 is a schematic three-dimensional view of a slip cover according to the present invention;
FIG. 10 is a schematic three-dimensional view of a slip of the present invention;
in the above figures, the reference numerals correspond to the component names as follows:
1-ramp face, 101-horizontal load step, 102-through hole, 2-connection key, 3-fastening screw, 4-ramp seat, 5-internally threaded tube, 6-first runner, 7-second runner, 8-anti-rotation pin, 9-setting mandrel, 901-sliding boss, 902-connection boss, 903-anti-rotation square groove, 10-driving sliding sleeve, 11-grouting hole, 12-locking ring, 1201-sliding groove, 1202-first locking boss, 13-spacing spring, 14-joint, 15-anchoring mandrel, 1501-anti-rotation square boss, 1502-second locking boss, 1503-spacing pin hole, 16-slip upper cone, 1601-first guide slope, 17-slip sleeve, 1701-square window, 1702-spacing groove, 18-slip, 1801-transverse latch, 1802-longitudinal latch, 1803-second guide slope, 19-slip lower cone, 20-spacing pin.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and examples, embodiments of which include, but are not limited to, the following examples.
As shown in fig. 1 to 10, a recoverable window sidetracking device for repeated operation comprises a whipstock and a setting anchoring device connected to the lower end of the whipstock, wherein the whipstock is of a hollow structure and is formed by connecting a tapered iron surface 1 and a tapered iron seat 4 through a connecting key 2 and a fastening screw 3, a through hole 102 for feeding, salvaging and recovering is formed in the tapered iron surface 1, an internal thread pipe 5 for feeding, salvaging and recovering is arranged right below the through hole 102 at the upper part of the bottom end of the tapered iron seat 4, a first runner 6 communicated with the internal thread pipe 5 is arranged inside the bottom end of the tapered iron seat 4, the lower part of the bottom end of the tapered iron seat 4 is connected with the upper end of a setting mandrel 9 of the setting anchoring device through threads and an anti-rotation pin 8, and a second runner 7 communicated with the first runner 6 is arranged inside the setting mandrel 9; a driving sliding sleeve 10 is sleeved on a setting mandrel 9, a grouting hole 11 communicated with the inner cavity of the driving sliding sleeve 10 is formed in the inner wall of the setting mandrel 9, a sliding boss 901 is arranged on the outer wall of the setting mandrel 9 and positioned at the lower side of the grouting hole 11, a locking ring 12 is sleeved between the setting mandrel 9 and the driving sliding sleeve 10, a sliding groove 1201 matched with the sliding boss 901 is formed in the inner wall of the upper end of the locking ring 12, a first locking boss 1202 is arranged in the inner wall of the lower end of the locking ring 12, and an anti-rotation square groove 903 is formed in the lower end of the setting mandrel 9; the setting mandrel 9 and the anchoring mandrel 15 are connected through a joint 14, the upper end of the joint 14 is connected with the lower end of the setting mandrel 9 through a connecting boss 902, the lower end of the joint 14 is connected with the upper end of the anchoring mandrel 15 through threads, and a limiting spring 13 is further arranged between the joint 14 and the locking ring 12; an anti-rotation square boss 1501 matched with an anti-rotation square groove 903 is arranged inside the upper end of the anchoring mandrel 15, a second locking boss 1502 matched with a first locking boss 1202 is arranged on the outer wall of the upper end of the anchoring mandrel 15, a slip upper cone 16 is sleeved below the second locking boss 1502 on the anchoring mandrel 15, the upper end of the slip upper cone 16 is connected with the lower end of the driving sliding sleeve 10 through threads, a slip lower cone 19 connected through threads is arranged at the lower end of the anchoring mandrel 15, a slip sleeve 17 is sleeved between the slip upper cone 1 and the slip lower cone 19, and a slip 18 is installed in the slip sleeve 1.
The inclined iron seat 4 and the inclined iron surface 1 are also provided with a horizontal bearing step 101 which is matched with each other, and the inclined iron surface 1 is made of hard alloy with high hardness and good wear resistance.
The length of the sliding boss 901 on the outer wall of the setting mandrel 9 is 50mm, the length of the sliding groove 1201 on the inner wall of the upper end of the locking ring 12 is 100mm, and when the window sidetracking device is in an unanchored state, the distance between the upper end face of the sliding boss 901 on the outer wall of the setting mandrel 9 and the upper end face of the sliding groove 1201 on the inner wall of the upper end of the locking ring 12 is 50mm under the action of the limiting spring 13.
The length of the first locking boss 1202 on the inner wall of the lower end of the locking ring 12 and the length of the second locking boss 1502 on the outer wall of the upper end of the anchoring mandrel 15 are both 50mm, and when the window sidetracking device is in an unanchored state, the lower end face of the first locking boss 1202 on the inner wall of the lower end of the locking ring 12 is aligned with the lower end face of the second locking boss 1502 on the outer wall of the upper end of the anchoring mandrel 15, and the circumferential direction is 45 degrees.
The outer walls of the upper slip cone 16 and the lower slip cone 19 are respectively provided with 4 first guide inclined planes 1601 which are uniformly distributed in the circumferential direction, 8 square windows 1701 are uniformly formed in the slip sleeve 17, a limiting groove 1702 which is used for limiting the slip sleeve 17 to move only axially relative to the anchoring mandrel 15 and not to rotate in the circumferential direction is formed in the outer wall of the slip sleeve 17, transverse clamping teeth 1801 are arranged on the outer surface of the upper portion of the slip 18, longitudinal clamping teeth 1802 are arranged on the outer surface of the lower portion of the slip 18, second guide inclined planes 1803,4 which are matched with the first guide inclined planes 1601 of the outer walls of the upper slip cone 16 and the lower slip cone 19 are respectively arranged at the upper bottom of the slip and the lower bottom of the slip, the second guide inclined planes 1803 at the bottom of the 4 slips 18 are respectively arranged in the 8 square windows 1701 of the slip sleeve 17, and the second guide inclined planes 1803 at the bottom of the 4 slips 18 are respectively arranged on the 8 first guide inclined planes 1601 of the slip cone.
The lower end of the anchoring mandrel 15 is provided with a limit pin hole 1503 which is used for limiting the slip sleeve 17 to move axially relative to the anchoring mandrel 15 and is large at the upper part and small at the lower part, one end of the limit pin 20 is anchored into the limit pin hole 1503, the other end is positioned in the limit groove 1702, and the width of the limit groove 1702 is slightly larger than the outer diameter of the limit pin 20.
When the windowing sidetracking tool is used for windowing, the following steps are adopted:
(a) Firstly, a lowering tool is rotated clockwise to be screwed with an inner threaded pipe 5 at the upper part of the bottom end of a chute seat 4, a window sidetrack device is lowered to be 30mm above a position needing window opening operation through the lowering tool, then high-pressure slurry is injected into the inner threaded pipe 5 through the lowering tool, the high-pressure slurry transmits pressure to a second flow channel 7 inside a setting mandrel through a first flow channel 6 inside the bottom end of the chute seat 4, the slurry pressure transmits pressure to a driving sliding sleeve 10 through a grouting hole 11 communicated with the second flow channel 7, when the pressure reaches the acting force of a compression limiting spring 13, the limiting spring 13 is compressed, the driving sliding sleeve 10 drives a locking ring 12, a slip upper cone 16, a slip sleeve 17 and slips 18 to move downwards by 50mm together, 4 slips 18 are supported out of square windows under the action of 8 guide 1601 inclined planes of the slip cone and 8 slip sleeve square windows 1701, at the moment, the upper section of a first locking boss 1202 on the locking ring 12 is tightly anchored on the inner wall of the sleeve, and the upper section of the first locking boss 1202 on the locking boss is tightly anchored mandrel 15 is aligned with the lower end face 1502 axially at 45 degrees in the circumferential direction;
(b) After the slip 18 is successfully anchored, the lowering tool drives the whipstock, the setting mandrel 9 and the locking ring 12 to rotate 45 degrees clockwise, and at the moment, the first locking boss 1202 on the locking ring 12 and the second locking boss 1502 at the upper end of the anchoring mandrel 15 are mutually meshed to realize axial locking, so that even if grouting is stopped, the driving sliding sleeve 10 and the upper cone 16 of the slip connected with the driving sliding sleeve 10 cannot retract, and the slip 18 is reliably anchored on the inner wall of the casing; after the engagement is finished, the lowering tool drives the whipstock and the setting mandrel 9 to move downwards for 30mm, so that the anti-rotation square groove 903 at the lower end of the setting mandrel 9 is matched with the anti-rotation square boss 1501 at the upper end of the anchoring mandrel 15, and circumferential anti-rotation locking is realized, thus the engaged locking bosses cannot rotate with each other, reliable locking and anchoring of the slips 18 are realized, and at the moment, the whipstock and the setting mandrel 9 are also locked and cannot rotate circumferentially;
(c) After locking, the lowering tool is rotated anticlockwise, so that the lowering tool is screwed out of the inner threaded pipe 5 at the upper part of the bottom end of the inclined iron seat 4, the lowering tool is lifted up, and the window drill bit is put in, so that window sidetracking operation can be performed;
(d) After the window opening operation is finished once, the window opening drill bit is lifted up, the lowering tool is put in, the lowering tool is rotated clockwise to enable the lowering tool to be screwed 5 with an inner threaded pipe at the upper portion of the bottom end of the wedge seat 4, after the screwing, the whipstock and the setting mandrel 9 are lifted up by 30mm, the anti-rotation square groove 903 at the lower end of the setting mandrel 9 is separated from the anti-rotation square boss 1501 at the upper end of the anchoring mandrel 15, the locking ring 12 is rotated clockwise for 45 degrees again, the first locking boss 1202 on the locking ring 12 is meshed with the second locking boss 1502 at the upper end 15 of the anchoring mandrel, at the moment, the limiting spring 13 rebounds to drive the driving sliding sleeve 10, the locking ring 12, the upper cone 16 of the slip and the slip sleeve 17 to move upwards to an initial position, the slip 18 is retracted into the slip sleeve square window 1701, and the slip 18 is released from the anchor.
(e) After the anchor is broken down, the lower tool drives the window sidetracking device to integrally move to a new window sidetracking position, and the steps (a) - (d) are repeated, so that window sidetracking operation can be repeated, and after all window sidetracking operations are completed, the lower tool is put into, so that all recovery of the window sidetracking device can be realized.
The above embodiments are only preferred embodiments of the present invention, and not intended to limit the scope of the present invention, but all changes made by adopting the design principle of the present invention and performing non-creative work on the basis thereof shall fall within the scope of the present invention.
Claims (7)
1. The utility model provides a recoverable window sidetracking device that opens of repetitive operation, includes the whipstock and connects the setting anchor at the whipstock lower extreme, its characterized in that: the whipstock is of a hollow structure and is formed by connecting a chute face (1) and a chute seat (4) through a connecting key (2) and a fastening screw (3), a through hole (102) for feeding, salvaging and recycling is formed in the chute face (1), an inner threaded pipe (5) for feeding, salvaging and recycling is arranged right below the through hole (102) at the upper part of the bottom end of the chute seat (4), a first flow passage (6) communicated with the inner threaded pipe (5) is arranged in the bottom end of the chute seat (4), the lower part of the bottom end of the chute seat (4) is connected with the upper end of a setting mandrel (9) of the setting anchoring device through threads and an anti-rotation pin (8), and a second flow passage (7) communicated with the first flow passage (6) is arranged in the setting mandrel (9); a driving sliding sleeve (10) is sleeved on a setting mandrel (9), a grouting hole (11) communicated with the inner cavity of the driving sliding sleeve (10) is formed in the inner wall of the setting mandrel (9), a sliding boss (901) is arranged on the outer wall of the setting mandrel (9) and positioned at the lower side of the grouting hole (11), a locking ring (12) is sleeved between the setting mandrel (9) and the driving sliding sleeve (10), a sliding groove (1201) matched with the sliding boss (901) is formed in the inner wall of the upper end of the locking ring (12), a first locking boss (1202) is formed in the inner wall of the lower end of the locking ring (12), and an anti-rotation square groove (903) is formed in the lower end of the setting mandrel (9); the setting mandrel (9) is connected with the anchoring mandrel (15) through a joint (14), the upper end of the joint (14) is connected with the lower end of the setting mandrel (9) through a connecting boss (902), the lower end of the joint (14) is connected with the upper end of the anchoring mandrel (15) through threads, and a limiting spring (13) is further arranged between the joint (14) and the locking ring (12); the anti-rotation square boss (1501) matched with the anti-rotation square groove (903) is arranged inside the upper end of the anchoring mandrel (15), the second locking boss (1502) matched with the first locking boss (1202) is arranged on the outer wall of the upper end of the anchoring mandrel (15), the slip upper cone (16) is sleeved below the second locking boss (1502) on the anchoring mandrel (15), the upper end of the slip upper cone (16) is connected with the lower end of the driving sliding sleeve (10) through threads, the slip lower cone (19) connected through threads is arranged at the lower end of the anchoring mandrel (15), the slip sleeve (17) is sleeved between the slip upper cone (16) and the slip lower cone (19), and the slip (18) is installed in the slip sleeve (17).
2. A recoverable window sidetracking apparatus according to claim 1 wherein: the iron seat (4) and the iron surface (1) are also provided with matched horizontal bearing steps (101), and the iron surface (1) is made of hard alloy with high hardness and good wear resistance.
3. A recoverable window sidetracking apparatus according to claim 1 wherein: the length of a sliding boss (901) on the outer wall of the setting mandrel (9) is 50mm, the length of a sliding groove (1201) on the inner wall of the upper end of the locking ring (12) is 100mm, and when the window sidetracking device is in an unanchored state, under the action of a limiting spring (13), the distance between the upper end face of the sliding boss (901) on the outer wall of the setting mandrel (9) and the upper end face of the sliding groove (1201) on the inner wall of the upper end of the locking ring (12) is 50mm.
4. A recoverable window sidetracking apparatus according to claim 1 wherein: the length of the first locking boss (1202) on the inner wall of the lower end of the locking ring (12) and the length of the second locking boss (1502) on the outer wall of the upper end of the anchoring mandrel (15) are both 50mm, and when the window sidetracking device is in an unanchored state, the lower end face of the first locking boss (1202) on the inner wall of the lower end of the locking ring (12) is aligned with the lower end face of the second locking boss (1502) on the outer wall of the upper end of the anchoring mandrel (15), and the circumferential direction is 45 degrees.
5. A recoverable window sidetracking apparatus according to claim 1 wherein: the utility model provides a slip upper cone (16) and slips lower cone (19) outer wall on all be equipped with 4 circumference evenly distributed's first inclined plane (1601) that leads, slip cover (17) even offer 8 square window (1701), slip cover (17) outer wall on still offer and be used for restricting slip cover (17) and only can not circumference pivoted spacing groove (1702) for anchoring mandrel (15) axial displacement, the surface of slips (18) upper portion be equipped with horizontal latch (1801), the surface of slips (18) lower part is equipped with vertical latch (1802), slips upper bottom and slips lower bottom are provided with respectively with slips upper cone (16) and slips lower cone (19) outer wall first inclined plane (1601) complex second inclined plane (1803) that leads, 4 slips (18) are laid respectively in 8 square window (1701) of slip cover (17), and the second inclined plane (1803) of 4 slips (18) bottoms are led on 8 first inclined planes (1601) of cone respectively.
6. A recoverable window sidetracking apparatus according to claim 1 wherein: the lower end of the anchoring mandrel (15) is provided with a limit pin hole (1503) which is used for limiting the slip sleeve (17) to move axially relative to the anchoring mandrel (15) and is large at the upper part and small at the lower part, one end of the limit pin (20) is anchored into the limit pin hole (1503), the other end of the limit pin is positioned in the limit groove (1702), and the width of the limit groove (1702) is slightly larger than the outer diameter of the limit pin (20).
7. A method of implementing a recoverable window sidetracking apparatus using a repetitive operation according to any one of claims 1 to 6, comprising the steps of:
(a) Firstly, rotating a lowering tool clockwise to screw with an inner threaded pipe (5) at the upper part of the bottom end of a wedge seat (4), lowering a window sidetrack device to a position which needs window opening operation by the lowering tool by 30mm, then injecting high-pressure slurry into the inner threaded pipe (5) by the lowering tool, transmitting the pressure to a second flow channel (7) in a setting mandrel by the high-pressure slurry through a first flow channel (6) in the bottom end of the wedge seat (4), transmitting the pressure to a driving sliding sleeve (10) by the slurry pressure through a grouting hole (11) communicated with the second flow channel (7), compressing the limiting spring (13) when the pressure reaches the acting force of a compressing limiting spring (13), driving the sliding sleeve (10) to drive a locking ring (12), an upper slip cone (16), a slip sleeve (17) and a slip (18) to move downwards by 50mm together, and under the action of 8 first guide inclined surfaces (1601) and 8 square sleeve windows (1701) of the slip, wherein the 4 square sleeves (18) are out of the sleeve, the locking ring (12) is anchored by the locking ring (1502) and the upper end face (15) is aligned with the second end face (1202) of the second sleeve;
(b) After the slip (18) is anchored successfully, the lowering tool drives the whipstock, the setting mandrel (9) and the locking ring (12) to rotate 45 degrees clockwise, at the moment, a first locking boss (1202) on the locking ring (12) and a second locking boss (1502) at the upper end of the anchoring mandrel (15) are mutually meshed to realize axial locking, so that even under the condition of stopping grouting, the driving sliding sleeve (10) and a slip upper cone (16) connected with the driving sliding sleeve (10) cannot retract, and the slip (18) is reliably anchored on the inner wall of the casing; after the meshing is completed, the downward-moving tool drives the whipstock and the setting mandrel (9) to move downwards for 30mm, so that an anti-rotation square groove (903) at the lower end of the setting mandrel (9) is matched with an anti-rotation square boss (1501) at the upper end of the anchoring mandrel (15), circumferential anti-rotation locking is realized, the meshing locking bosses cannot rotate mutually, reliable locking and anchoring of the slips (18) are realized, and the whipstock and the setting mandrel (9) are locked and cannot rotate circumferentially;
(c) After locking, the lowering tool is rotated anticlockwise, so that the lowering tool is screwed out of an inner threaded pipe (5) at the upper part of the bottom end of the inclined iron seat (4), the lowering tool is lifted up, and the window drill bit is put in, so that window sidetracking operation can be performed;
(d) After one window opening operation is completed, a window opening drill bit is lifted up, a lowering tool is put down, the lowering tool is rotated clockwise to be screwed with an inner threaded pipe (5) at the upper part of the bottom end of a bevel iron seat (4), a whipstock and a setting mandrel (9) are lifted up by 30mm after screwing, an anti-rotation square groove (903) at the lower end of the setting mandrel (9) is separated from an anti-rotation square boss (1501) at the upper end of an anchoring mandrel (15), the locking tool is rotated clockwise for 45 degrees, a first locking boss (1202) on a locking ring (12) is meshed with a second locking boss (1502) at the upper end of the anchoring mandrel (15), at the moment, a limiting spring (13) is rebounded to drive a driving sliding sleeve (10), the locking ring (12), a slip upper cone (16) and a slip sleeve (17) to move up to an initial position, a slip (18) is retracted into a slip sleeve square window (1701), and the slip (18) is released from anchors;
(e) After the anchor is broken down, the lowering tool drives the window sidetracking device to integrally move to a new window sidetracking position, the steps (a) - (d) are repeated, window sidetracking operation is repeated, and after all window sidetracking operations are completed, the lowering tool is put in, so that all the window sidetracking devices are recovered.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311042525.7A CN116971743B (en) | 2023-08-18 | 2023-08-18 | Recoverable window sidetracking device capable of repeating operation and implementation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311042525.7A CN116971743B (en) | 2023-08-18 | 2023-08-18 | Recoverable window sidetracking device capable of repeating operation and implementation method thereof |
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| CN116971743B CN116971743B (en) | 2024-02-06 |
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|---|---|---|---|---|
| US5154231A (en) * | 1990-09-19 | 1992-10-13 | Masx Energy Services Group, Inc. | Whipstock assembly with hydraulically set anchor |
| US6283208B1 (en) * | 1997-09-05 | 2001-09-04 | Schlumberger Technology Corp. | Orienting tool and method |
| CN203547534U (en) * | 2013-09-13 | 2014-04-16 | 中国海洋石油总公司 | Integral window sidetrack drilling tool |
| CN115199228A (en) * | 2021-04-12 | 2022-10-18 | 江苏油田矿业开发有限公司 | Tool for window sidetracking without tripping and casing window sidetracking construction method |
| CN115288611A (en) * | 2022-08-08 | 2022-11-04 | 西南石油大学 | Continuous pipe all-dimensional horizontal directional deflecting tool |
| CN116006078A (en) * | 2023-01-03 | 2023-04-25 | 中煤科工西安研究院(集团)有限公司 | Recyclable whipstock for multi-branch horizontal well and downward-falling recycling method of recyclable whipstock |
| CN116427880A (en) * | 2023-04-17 | 2023-07-14 | 西南石油大学 | Ultra-deep well integrated multi-slip sidetrack drilling setting device |
-
2023
- 2023-08-18 CN CN202311042525.7A patent/CN116971743B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5154231A (en) * | 1990-09-19 | 1992-10-13 | Masx Energy Services Group, Inc. | Whipstock assembly with hydraulically set anchor |
| US6283208B1 (en) * | 1997-09-05 | 2001-09-04 | Schlumberger Technology Corp. | Orienting tool and method |
| CN203547534U (en) * | 2013-09-13 | 2014-04-16 | 中国海洋石油总公司 | Integral window sidetrack drilling tool |
| CN115199228A (en) * | 2021-04-12 | 2022-10-18 | 江苏油田矿业开发有限公司 | Tool for window sidetracking without tripping and casing window sidetracking construction method |
| CN115288611A (en) * | 2022-08-08 | 2022-11-04 | 西南石油大学 | Continuous pipe all-dimensional horizontal directional deflecting tool |
| CN116006078A (en) * | 2023-01-03 | 2023-04-25 | 中煤科工西安研究院(集团)有限公司 | Recyclable whipstock for multi-branch horizontal well and downward-falling recycling method of recyclable whipstock |
| CN116427880A (en) * | 2023-04-17 | 2023-07-14 | 西南石油大学 | Ultra-deep well integrated multi-slip sidetrack drilling setting device |
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|---|---|
| CN116971743B (en) | 2024-02-06 |
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