CN214836114U - Multi-branch well bore ultra-short radius windowing sidetrack drilling recoverable positioner - Google Patents
Multi-branch well bore ultra-short radius windowing sidetrack drilling recoverable positioner Download PDFInfo
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- CN214836114U CN214836114U CN202120203645.0U CN202120203645U CN214836114U CN 214836114 U CN214836114 U CN 214836114U CN 202120203645 U CN202120203645 U CN 202120203645U CN 214836114 U CN214836114 U CN 214836114U
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Abstract
The utility model discloses a multi-branch borehole ultra-short radius windowing sidetrack drilling recoverable positioner, which mainly comprises an upper positioning body, a righting body and a lower positioning body, wherein the upper positioning body and the lower positioning body are both provided with guide inclined planes, a righting block is arranged in the righting body, the upper positioning body is connected with the righting body and the lower positioning body through fixed pins, and fishing threads are arranged in the upper positioning body; the upper positioning body is connected with the reverse buckling rod of the positioner and the upper joint of the positioner in sequence. The utility model discloses in not having sitting and sealing mechanisms such as anchor tile, also need not deblocking mechanism, can directly salvage the recovery, instrument simple structure is reliable, and the construction success rate is improved by a wide margin. Use the utility model discloses the cooperation sidetracking construction of windowing can realize the windowing of multiple windows, and a plurality of branch well bores that form can also exploit a plurality of target layers of the different degree of depth in the target layer of equidirectional exploitation same degree of depth, and the exploitation mode is more nimble, and the drilling and completion technology suitability is higher, can reach the showing development effect of cost reduction increase.
Description
Technical Field
The utility model relates to a petroleum industry multilateral well bore ultrashort radius sidetracking assists orienting device, especially multilateral well bore ultrashort radius sidetracking recoverable locator of windowing.
Background
At present, most old oil fields in China enter the middle and later stages of development, the pressure coefficient of a main force block is lower and lower, the exploitation economy is poorer and poorer by adopting the traditional drilling mode, and the sidetracking horizontal well by opening a window in an old well barrel is one of yield increasing means with higher economy in the existing oil exploitation. However, the conventional sidetracking horizontal well has a long inclined well section and large displacement before the target, and residual oil around the old well and the near well cannot be effectively used. Aiming at the development problem, the ultra-short radius side drilling horizontal well technology is developed at home and abroad in recent years, a target layer can be quickly drilled with a curvature radius of 3-5m, a horizontal well hole with a certain length is drilled, the drilling cost is greatly saved, the reservoir exploitation degree is improved, but aiming at a multilayer oil reservoir, the single-branch ultra-short radius horizontal well has low reserve control degree in the longitudinal direction, and the problem of small plane spread range even in the same oil layer exists, so that the ultra-short radius multi-branch side drilling horizontal well technology is required to be developed, the economic and effective exploitation of 'small-scale' residual oil between a plane and an interlayer is improved, meanwhile, in the aspect of adjusting the streamline of a water-driven oil reservoir, the ultra-short radius multi-branch side drilling horizontal well can realize balanced displacement and exploitation and enlargement of the spread volume by side drilling horizontal well holes with different directions and lengths according to the heterogeneous distribution characteristics of the plane oil reservoir, the recovery ratio is improved.
The existing ultra-short radius sidetracking horizontal well technology is mainly divided into two categories, namely high-pressure water jet injection drilling and flexible steering drilling tool rotary drilling. Chinese patent ZL2008101194691 discloses a radial horizontal drilling device, which utilizes a high-pressure hose to connect a jet drill bit, the jet drill bit jets high-pressure water jet to break rock to form a horizontal borehole, and the technology has the following problems: the horizontal well formed by the jet flow jet rock breaking has small borehole diameter and irregular pore passage, and due to the reason of a hose, the advancing track of the hydraulic jet drill bit is uncontrollable, the formed borehole track is irregular, the borehole track cannot be measured, an applicable well completion technology is lacked, a sand production reservoir cannot prevent sand, the borehole is easy to collapse and close because of no support, and the yield is reduced rapidly.
Aiming at the defects of a high-pressure water jet injection drilling technology, Chinese patents ZL2015104510629, ZL 201146271, ZL2017109462512, ZL2017105827546 and the like disclose a guiding type ultrashort radius horizontal well drilling method, and the drilling principle is basically similar: firstly, setting the whipstock, adopting magnetic positioning to calibrate the depth when setting the whipstock, and determining the normal direction of the inclined plane of the whipstock by a gyroscope to enable the normal direction to be the same as the designed azimuth angle of the borehole. And after the whipstock is set, windowing is carried out by adopting a conventional windowing method, a deflecting section is drilled by adopting a guiding drilling tool, the guiding drilling tool comprises a guiding cylinder and a flexible drilling rod, wherein the guiding cylinder is of a human body elbow joint simulating structure and can only be bent in a certain direction in a semi-radial direction with fixed curvature at one side, and the flexible drilling rod in the deflecting section is restrained to carry out deflecting drilling. When the guide drilling tool is put in, the bending direction of the guide cylinder is adjusted by the gyroscope to be consistent with the normal direction of the inclined plane of the whipstock, and the ultra-short radius deflecting drilling direction is ensured to be the same as the design direction of the well hole. The guide drilling tool is mainly used for drilling construction of an ultra-short radius deflecting well section, and after the deflecting section is finished and reaches a target layer, the guide drilling tool is lifted out, and a horizontal drilling tool is put in to finish horizontal well hole drilling. The technology can finish the deflecting section with the curvature radius of 3-5m, quickly enter a target layer with 90-degree well deflection, can horizontally drill 50-100 m, and basically can meet the technological requirements of ultra-short radius horizontal drilling. However, only a single-branch horizontal borehole can be drilled in the same shaft, and an ultra-short-radius multi-branch lateral drilling horizontal well cannot be implemented, and the technical bottleneck is the lack of a multi-branch borehole windowing lateral drilling tool.
In order to realize the window sidetracking of the multilateral wellbore, a plurality of whipstocks are required to be set, the prior technical scheme is that salvageable and recyclable whipstocks are adopted, window sidetracking is carried out for a plurality of times in setting at different depths of the same wellbore, and finally all whipstocks are fished out to carry out well completion operation.
The related technical devices disclosed by Chinese patents are also as follows:
ZL2014204156245 discloses a variable diameter recoverable whipstock;
ZL2010105643447 discloses a retrievable orbital ramp;
ZL972230955 discloses a retrievable guide;
ZL2005101352615 discloses a recoverable whipstock and a fishing tool thereof;
ZL2010202320321 discloses a fishable sidetracking integrated deflector;
ZL2010202320321 discloses a suspended positioning type recoverable whipstock;
ZL2016201515245 discloses a hydraulic seat seal recoverable whipstock with a self-closing connecting channel.
The working principle of the patent technology is basically similar, and the technical scheme is as follows: and (3) setting hydraulically by descending the tool to a preset position, anchoring in the sleeve through slips, and guiding a windowing tool to grind and mill the casing windowing by utilizing an inclined iron at the upper part of the tool. And during recovery, a special fishing tool is adopted, after a fishing joint is fished, a lifting force is applied, the shearing pin is cut off, the setting piston retracts, the slips are released, anchoring is removed, and the whipstock is recovered.
However, when the technical device is used for multilateral wellbore sidetrack windowing construction, the following problems exist:
Therefore, in order to realize ultra-short radius multi-branch sidetracking of the horizontal well, improve the construction efficiency and the construction success rate of multi-window sidetracking, reduce the operation cost, a recyclable positioning tool for the sidetracking needs to be manufactured, the bottleneck of the prior art is overcome, and the development effect of cost reduction and efficiency improvement is achieved.
Disclosure of Invention
The utility model aims at providing a but multilateral well bore ultrashort radius sidetracking lateral drill recovery locator that windows realizes the multiple window and windows, improves windowing sidetracking efficiency of construction and construction success rate, reduces the operating cost, reaches cost reduction and efficiency's development effect.
The technical scheme of the utility model is realized like this:
multilateral well bore ultrashort radius windowing sidetracking locator mainly comprises last location body, right body and lower location body, wherein:
the upper positioning body and the lower positioning body are both provided with a guide inclined plane;
the righting body is internally provided with a righting block, the upper positioning body is connected with the righting body and the lower positioning body through fixing pins, and fishing threads are arranged in the upper positioning body;
the upper positioning body is connected with the reverse buckling rod of the positioner and the upper joint of the positioner in sequence.
The centering body is provided with a centering block mounting groove in the circumferential direction and at least one group of centering blocks in the circumferential direction, a spring mounting hole and a spring are arranged in a block body of each centering block, two side wing edges of each centering block are buckled and pressed below a pressing sheet or a pressing sleeve, and the pressing sheet or the pressing sleeve is fixed in the centering body through a fixing pin.
The manufacturing length of the centralizing body or the number of the centralizing bodies connected in the recoverable positioner can be adjusted according to the axial distance between the ultra-short radius horizontal branch well bore I and the ultra-short radius horizontal branch well bore II.
The installation direction between the guide inclined plane of the upper positioning body in the recoverable positioner and the guide inclined plane in the lower positioning body is consistent with the azimuth angle of the track of the lateral drilling branch well and can be stacked in the main well, and the angle of the guide inclined plane in the upper positioning body in the lower recoverable positioner is the same as that of the guide inclined plane in the lower positioning body in the other recoverable positioner stacked on the upper positioning body.
The upper end of the locator back-off rod is in threaded connection with the locator upper joint, and the lower end of the locator back-off rod is provided with a back-off thread and can be connected with the back-off thread on the inner circle of the lower end of the upper locating body; fishing threads are arranged above the inner circle step in the middle of the upper positioning body; the excircle of the lower part of the locator back-off rod is provided with back-off threads, and the locator back-off rod is inserted in the inner circle step of the lower part of the upper locating body and is connected together through the back-off threads.
The outer circle of the upper part of the locator back-off rod is also provided with a righting ring carrying step, and the locator righting ring is installed outside the locator back-off rod above the righting ring carrying step and is fixed with the guide inclined plane of the upper locating body through a locator righting screw; the upper part of the locator back-off rod is in threaded connection with the locator upper joint, and the inner cavity of the upper part of the locator upper joint is provided with drill rod joint threads or oil pipe threads.
The lower positioning body is provided with a central hole, the inner circle of the upper part of the lower positioning body is provided with an inserting step, 6 through holes are uniformly formed in the inserting step body in the circumferential direction, 1 through hole is aligned with the normal direction of the lower guide inclined plane in the circumferential direction, and the lower end of the lower guide inclined plane in the lower positioning body is a plane.
The outer circle of the lower end of the righting body is an inserting outer circle, 6 counter bores are correspondingly formed in the inserting outer circle upwards corresponding to the 6 through holes in the lower positioning body, and the fixing pin can be inserted into the through hole of the lower positioning body and the counter bores in the righting body; when the inserting excircle of the righting body is inserted into the inserting step of the lower positioning body, the counter bores correspond to the through holes one by one, and the lower positioning body and the righting body are fixed through the fixing pins; the inner circle of the upper end of the righting body is also provided with an inserting step, the circumference of the inserting step is also uniformly provided with 6 through holes, the through holes are in one-to-one correspondence with counter bores in an inserting excircle of the lower part of the upper positioning body, and fixing pins can be inserted; a counter bore is formed in the inserting excircle of the lower part of the upper positioning body and is aligned with the normal direction of the guide slope of the upper positioning body in the circumferential direction; the inserting excircle at the lower part of the upper positioning body is arranged below the guide inclined plane.
The angle of the lower part of the lower positioning body is the same as that of the inclined guide surface of the inclined guide body in the inclined fixer.
Compared with the prior art, the utility model discloses a show the result of use and lie in:
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of the working principle of the present invention.
Fig. 2 is a schematic diagram of a retrievable locator.
Detailed Description
The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present disclosure. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 2, the multilateral wellbore ultra-short radius windowing sidetrack retrievable locator 2 mainly comprises an upper locating body 2.5, a righting body 2.7 and a lower locating body 2.11, wherein:
the upper positioning body 2.5 and the lower positioning body 2.11 are both provided with a guide inclined plane;
the righting body 2.7 is internally provided with a righting block 2.9, the upper positioning body 2.5 is connected with the righting body 2.7 and the lower positioning body 2.11 through a fixing pin 2.6, and fishing threads are arranged in the upper positioning body 2.5;
the upper positioning body 2.5 is connected with the positioner back-off rod 2.2 and the positioner upper joint 2.1 in sequence.
Recoverable locator 2 mainly by lower locating body 2.11, right body 2.7 and go up locating body 2.5 peg graft and fix through fixed pin 2.6 and become a whole, the half inclined plane structure of lower locating body 2.11 lower part becomes and leads the inclined plane, owing to be equipped with in the last locating body 2.5 and salvage the screw thread, can salvage the recovery conveniently.
On the basis of the first embodiment, the utility model discloses still have following embodiment:
the centralizing body 2.7 is provided with a centralizing block mounting groove in the circumferential direction and at least one group of centralizing blocks 2.9 in the circumferential direction, the block body of the centralizing block 2.9 is provided with a spring mounting hole and is provided with a spring 2.10, two side wing edges of the centralizing block 2.9 are buckled and pressed below a pressing sheet or a pressing sleeve 2.8, and the pressing sheet or the pressing sleeve 2.8 is fixed in the centralizing body 2.7 through a fixing pin 2.6. The pressing sheet is a sheet-shaped body which is pressed on two sides of the righting block mounting groove through a fixing pin cover, the pressing sleeve 2.8 is an annular sleeve which is fixed in a 2.7-ring groove of the righting body on two sides of the righting block mounting groove, and the righting block 2.9 can be fixed in the righting body 2.7 through the two pressing structures. The body of righting 2.7 can set up multiunit and right piece 2.9 in righting, it has 3 vertical grooves to open at least in the upper middle portion excircle of body of righting 2.7 in circumference, the lower middle portion excircle also has 3 vertical grooves at least to open in circumference, the piece of righting 2.9 is installed in every groove, it has the spring hole to right piece 2.9 bottom design, place spring 2.10 in the spring hole, the top is tight between piece of righting 2.9 and tank bottom, it compresses tightly and fastens through fixed pin 2.6 through preforming or pressing sleeve 2.8 to right piece 2.9 both ends. The centralizing block 2.9 is higher than the outer surface of the centralizing body 2.7 under the supporting action of the spring 2.10, and is supported on the inner wall of the shaft to play a role in centralizing in the process of descending. When the card is blocked, the righting block 2.9 can compress the spring 2.10 to contract inwards, and smoothly passes through the blocking position.
The manufacturing length of the centralizing body 2.7 or the number of the centralizing bodies connected in the recoverable locator 2 can be adjusted according to the axial distance between the ultra-short radius horizontal branch well bore I3 and the ultra-short radius horizontal branch well bore II 4. The processing length of the centralizing body 2.7 can be determined according to the axial distance between the ultra-short radius horizontal branch well bore I3 and the ultra-short radius horizontal branch well bore II 4, the length can be increased by increasing the number of the connected centralizing bodies 2.7 in series, and a plurality of groups of centralizing blocks 2.9 can be arranged on the lengthened centralizing body 2.7 in the circumferential direction so as to adjust the distance between the upper positioning body 2.5 and the lower positioning body 2.11 and adjust the longitudinal distances of different sidetracking windows.
The installation orientation between the guide slope of the upper positioning body 2.5 in the retrievable locator 2 and the guide slope of the lower positioning body 2.11 is consistent with the azimuth angle of the track of the lateral branch well bore and can be stacked in the main well bore 5, and the angle of the guide slope of the upper positioning body 2.5 in the lower retrievable locator 2 is the same as the angle of the guide slope of the lower positioning body 2.11 in another retrievable locator 2 stacked on the lower retrievable locator.
The upper end of the locator back-off rod 2.2 is in threaded connection with the locator upper joint 2.1, the lower end of the locator back-off rod 2.2 is provided with back-off threads and can be connected with the back-off threads of the inner circle of the lower end of the upper locating body 2.5; a salvaging thread is arranged above the inner circular step in the middle of the upper positioning body 2.5, the salvaging thread can be an oil pipe thread or a drill rod joint thread, and the recoverable positioner 2 can be salvaged through an oil pipe column or a drill string connected by a drill rod; the excircle of the lower part of the locator back-off rod 2.2 is provided with back-off threads, and the locator back-off rod 2.2 is inserted in the inner circle step of the lower part of the upper locating body 2.5 and is connected together through the back-off threads.
A righting ring carrying step is further arranged on the outer circle of the upper portion of the locator back-off rod 2.2, and a locator righting ring 2.3 is mounted outside the locator back-off rod 2.2 above the righting ring carrying step and fixed with a guide inclined plane of the upper locating body 2.5 through a locator righting screw 2.4; the upper part of the locator back-off rod 2.2 is in threaded connection with the locator upper joint 2.1, and the inner cavity of the upper part of the locator upper joint 2.1 is provided with drill rod joint threads or oil pipe threads which can be connected with a drill rod or oil pipe to send the tool into the underground. The middle upper part of the locator back-off rod 2.2 is provided with a righting ring carrying step, the locator back-off rod 2.2 above the step is carried by the righting ring, the locator righting ring 2.3 is sleeved outside the locator back-off rod 2.2, the locator righting ring 2.3 is fixed on the guide inclined plane of the upper locating body 2.5 through a locator righting screw 2.4, so that the locator back-off rod 2.2 is kept in the middle, and smooth implementation of back-off and releasing is facilitated.
The lower positioning body 2.11 is provided with a central hole, the inner circle of the upper part of the lower positioning body is provided with an inserting step, 6 through holes are uniformly formed in the circumferential direction of the inserting step body, 1 through hole is aligned with the normal direction of the lower guide inclined plane in the circumferential direction, and the lower end of the lower guide inclined plane in the lower positioning body 2.11 is a plane. The flat head structure at the lower end of the guide inclined surface of the lower positioning body 2.11 can prevent self-locking caused by wedging action when being matched with the guide inclined body of the inclined fixer 1 or the upper positioning body 2.5 of the recoverable positioner 2.
The excircle of the lower end of the righting body 2.7 is an inserting excircle, 6 counter bores are correspondingly formed in the inserting excircle which upwards corresponds to 6 through holes in the lower positioning body 2.11, and the fixing pin 2.6 can be inserted into the through hole of the lower positioning body 2.11 and the counter bore in the righting body 2.7; when the inserting excircle of the righting body 2.7 is inserted into the inserting step of the lower positioning body 2.11, the counter bores correspond to the through holes one by one, and the lower positioning body 2.11 and the righting body 2.7 are fixed through the fixing pin 2.6; the inner circle of the upper end of the righting body 2.7 is also provided with an inserting step, 6 through holes are uniformly formed in the circumferential direction of the inserting step, the inserting step corresponds to counter holes in an inserting excircle at the lower part of the upper positioning body 2.5 one by one and can be inserted with fixing pins 2.6; a counter bore is arranged in the inserting excircle at the lower part of the upper positioning body 2.5 and is aligned with the normal direction of the guide inclined plane of the upper positioning body 2.5 in the circumferential direction; the inserting excircle at the lower part of the upper positioning body 2.5 is arranged below the guide inclined plane. The upper end of the upper positioning body 2.5 is a guide inclined plane, and the inserting excircle of the lower part is also correspondingly provided with 6 counter bores in the circumferential direction, wherein 1 counter bore is aligned with the normal direction of the guide inclined plane of the upper part in the circumferential direction. When the inserting excircle at the lower part of the upper positioning body 2.5 is inserted into the inserting step of the inner circle at the upper end of the centralizing body 2.7, the counter bores correspond to the through holes one to one, and the fixing pins 2.6 can be inserted for fixing. When the upper positioning body 2.5, the righting body 2.7 and the lower positioning body 2.11 are fixed through the fixing pin 2.6, the upper positioning body 2.5 or the lower positioning body 2.11 can be rotated by 60 degrees in the circumferential direction at each time, so that through holes in different directions are aligned with counter bores for installation, and therefore, the included angle between the normal direction of the guide inclined plane of the upper positioning body 2.5 and the normal direction of the guide inclined plane at the lower end of the lower positioning body 2.11 can be selectively adjusted by 0 degree, 60 degrees, 120 degrees, 180 degrees, 240 degrees or 300 degrees, and casing windowing can be performed to different design azimuth angles when different branch boreholes are sidetracked.
The angle of the lower part of the lower positioning body 2.11 is the same as that of the inclined guide surface of the inclined guide body in the inclined fixer 1. In sidetracking construction, the oblique fixer 1 can be retained in the main borehole 5 below the windowing window of the ultra-short radius horizontal branch borehole-3. The oblique fixer 1 can be used as a supporting tool of an ultra-short radius horizontal branch well hole of a subsequent sidetrack and is reserved in a main well hole 5 below a windowing window 3 of the ultra-short radius horizontal branch well hole. The angle of the lower guide inclined plane of the lower positioning body 2.11 is the same as that of the guide inclined plane in the inclined fixer 1, and the lower positioning body can be matched with each other, so that multi-window windowing in a main well bore is realized, the operation cost is reduced, and the development effect of cost reduction and efficiency improvement is achieved.
The diagonal holder 1 may be connected to a drill string or tubing string and run downhole.
The following describes the method of using the retrievable locator for the multilateral wellbore ultra-short radius window sidetracking, taking sidetracking in a straight wellbore, i.e. a straight well casing, as an example.
The use method of the recoverable locator for the ultra-short radius windowing sidetrack drilling of the multilateral well bore comprises the following use steps:
A. setting the oblique fixator 1 in the main borehole 5, milling the casing by using a windowing milling cone, forming a first window in the casing, and starting a windowing drilling tool;
B. and (3) drilling an ultra-short radius horizontal branch borehole (3) at the side of the running ultra-short radius horizontal drilling combined drilling tool, and taking out the drilling tool after drilling: the combined drilling tool for running into the ultra-short-radius horizontal drilling well comprises a flexible drill bit, a flexible inclined stabilizer, a flexible drill rod, a conversion joint and a conventional drill rod from bottom to top, and is referred to as 'an ultra-short-radius horizontal drilling flexible drill string and a construction method' with the patent application number of 202011588794. When the combined drilling tool reaches the window position of the casing, the drilling tool is slowly lowered, the flexible drill bit touches the inclined plane of the inclined guide body of the inclined fixer 1, then the bit pressure is slightly increased, the inclined plane of the inclined guide body of the inclined fixer 1 applies lateral reaction force to the flexible drill bit, the lateral reaction force is the same as the design position of the ultra-short radius well track, the flexible drill bit is forced to bend laterally, the bending direction faces the design position of the ultra-short radius well track, drilling is started, the ultra-short radius horizontal branch well bore I3 is completed, and the ultra-short radius horizontal drilling combined drilling tool is started.
C. Adjusting a normal included angle of a guide slope between a lower positioning body 2.11 and an upper positioning body 2.5 in the recoverable positioner 2 according to an azimuth included angle of a well hole between the ultra-short radius horizontal branch well hole I3 and the ultra-short radius horizontal branch well hole II 4;
D. c, putting the recyclable positioner 2 in, enabling the lower positioning body 2.11 to be stacked on the inclined guide body of the inclined fixer 1, milling the casing pipe by using a windowing milling cone, forming a second window in the casing pipe or continuously forming a next window in different target layers or the same target layer in the casing pipe according to the steps C and D, and taking out the windowing drilling tool;
E. according to the construction design, sidetracking the ultra-short radius horizontal branch well bore II 4 in different target layers or sidetracking the ultra-short radius horizontal branch well bore II 4 in the same target layer; and (3) putting the ultra-short radius horizontal drilling combined drilling tool into the well, sidetracking the ultra-short radius horizontal branch well bore two 4 and the next ultra-short radius horizontal branch well bore, and taking out the drilling tool after drilling.
The longitudinal distance between the windows of the ultra-short radius horizontal branch borehole one 3 and the ultra-short radius horizontal branch borehole two 4 can be realized by adjusting the length of the centralizing body 2.7, and can also be realized by installing different numbers of centralizing bodies 2.7. The azimuth included angle between the ultra-short radius horizontal branch well bore I3 and the ultra-short radius horizontal branch well bore II 4 can be realized by adjusting the normal included angle of the guide slope between the upper positioning body 2.5 and the lower positioning body 2.11.
F. And (3) putting a flexible screen pipe into the main well bore 5 and the ultra-short radius horizontal branch well bore I3 positioned at the lowermost layer to perform sand control completion.
One or more sets of retrievable locators 2 may be run in again and the windowed sidetrack formed into ultra-short radius horizontal offset boreholes of different azimuth, different depth, which can be used for different layers of interest or the same layer of interest. After all branch boreholes are drilled, a fishing tool is put in and connected with the fishing thread of the upper positioning body 2.5 in the recoverable positioner 2, and the recoverable positioner 2 can be separated from the inclined fixer 1 by lifting and fished out of the shaft. All the retrievable locators 2 are fished out in sequence, leaving only the bottom-most diagonal fixture 1 in the main wellbore 5. And then, a flexible sand control screen pipe is put in, the flexible sand control screen pipe can be smoothly put in the ultra-short-radius horizontal branch well bore I3 under the guiding action of the oblique fixer 1 at the bottom, the sand control screen pipe at the upper part is suspended in the main well bore 5 through the tail pipe hanger, and the tail pipe hanger is positioned above the uppermost branch well bore, so that the sand control completion of the main well bore 5 and the first branch well bore, namely the ultra-short-radius horizontal branch well bore I3 in the figure is realized.
The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made, and equivalents can be substituted for elements thereof. Any modification, equivalent replacement, improvement and the like made within the spirit and the concept of the present invention should be included in the protection scope of the present invention. The scope of protection is therefore not limited to the description above.
Claims (9)
1. A multilateral wellbore ultra-short radius windowing sidetrack drilling recoverable locator is characterized in that the recoverable locator (2) mainly comprises an upper locating body (2.5), a righting body (2.7) and a lower locating body (2.11), wherein the upper locating body (2.5) and the lower locating body (2.11) are provided with guide inclined planes;
a righting block (2.9) is arranged in the righting body (2.7), an upper positioning body (2.5) is connected with the righting body (2.7) and a lower positioning body (2.11) through a fixing pin (2.6), and fishing threads are arranged in the upper positioning body (2.5);
the upper positioning body (2.5) is connected with the positioner back-off rod (2.2) and the positioner upper joint (2.1) in sequence.
2. The multilateral wellbore ultrashort radius windowing sidetrack retrievable locator of claim 1, characterized in that the centralizing body (2.7) is provided with a centralizing block mounting groove in the circumferential direction and at least one set of centralizing blocks (2.9) in the circumferential direction, the centralizing blocks (2.9) are provided with spring mounting holes in the block body and are provided with springs (2.10), the two side flanges of the centralizing blocks (2.9) are buckled and pressed under the pressing sheet or the pressing sleeve (2.8), and the pressing sheet or the pressing sleeve (2.8) is fixed in the centralizing body (2.7) through fixing pins (2.6).
3. Multilateral wellbore ultra-short radius windowed sidetracking retrievable locator according to claim 1 or 2, characterized in that the manufacturing length of the centralizing body (2.7) or the number of connections in the retrievable locator (2) can be adjusted according to the distance in the axial direction between the ultra-short radius horizontal lateral wellbore one (3) and the ultra-short radius horizontal lateral wellbore two (4).
4. Multilateral wellbore ultrashort radius window sidetracking retrievable locator according to claim 3, characterized in that the orientation of the installation between the lead slope of the upper locator (2.5) in the retrievable locator (2) and the lead slope in the lower locator (2.11) coincides with the azimuth of the sidetracking multilateral wellbore trajectory and can be stacked in the main wellbore (5), the angle of the lead slope in the upper locator (2.5) in the lower retrievable locator (2) being the same as the angle of the lead slope in the lower locator (2.11) in the other retrievable locator (2) stacked on top of it.
5. The multilateral wellbore ultra-short radius windowing sidetrack retrievable locator of claim 1, wherein the upper end of the locator back-off rod (2.2) is in threaded connection with the locator upper connector (2.1), the lower end of the locator back-off rod (2.2) is provided with a back-off thread and can be connected with the back-off thread of the inner circle of the lower end of the upper locating body (2.5); fishing threads are arranged above the inner circular step in the middle of the upper positioning body (2.5); the excircle of the lower part of the locator back-off rod (2.2) is provided with back-off threads, and the locator back-off rod (2.2) is inserted in the inner circle step of the lower part of the upper locating body (2.5) and is connected together through the back-off threads.
6. The multilateral wellbore ultrashort radius windowing sidetrack retrievable locator of claim 5, characterized in that the upper outer circle of the locator reversing rod (2.2) is further provided with a righting ring carrying step, and the locator righting ring (2.3) is installed outside the locator reversing rod (2.2) above the righting ring carrying step and fixed with the guiding slope of the upper locating body (2.5) through a locator righting screw (2.4); the upper part of the locator back-off rod (2.2) is in threaded connection with the locator upper joint (2.1), and the inner cavity of the upper part of the locator upper joint (2.1) is provided with drill rod joint threads or oil pipe threads.
7. The retrievable locator of the multilateral wellbore ultra-short radius windowing sidetrack drilling according to claim 4, characterized in that the lower locating body (2.11) is provided with a central hole and the upper inner circle is provided with an insertion step, 6 through holes are evenly opened in the circumferential direction of the insertion step body and 1 of the through holes is aligned with the normal direction of the lower guiding bevel in the circumferential direction, and the lower end of the guiding bevel in the lower locating body (2.11) is a plane.
8. The multilateral wellbore ultrashort radius windowing sidetrack retrievable locator of claim 7, characterized in that the outer circle of the lower end of the righting body (2.7) is a plugging outer circle, 6 counter bores are correspondingly formed in the plugging outer circle corresponding to 6 through holes in the lower positioning body (2.11) upwards, and fixing pins (2.6) can be inserted into the through holes of the lower positioning body (2.11) and the counter bores in the righting body (2.7); when the inserting excircle of the righting body (2.7) is inserted into the inserting step of the lower positioning body (2.11), the counter bores correspond to the through holes one by one, and the lower positioning body (2.11) and the righting body (2.7) are fixed through the fixing pin (2.6); the inner circle of the upper end of the righting body (2.7) is also provided with an inserting step, 6 through holes are uniformly formed in the circumferential direction of the inserting step, the inserting step corresponds to counter holes in an inserting excircle at the lower part of the upper positioning body (2.5) one by one and can be inserted with fixing pins (2.6); a counter bore is arranged in the inserting excircle at the lower part of the upper positioning body (2.5) and is aligned with the normal direction of the guide slope of the upper positioning body (2.5) in the circumferential direction; the inserting excircle at the lower part of the upper positioning body (2.5) is arranged below the guide inclined plane.
9. The retrievable locator of the multilateral wellbore ultra-short radius window sidetracking according to claim 7, wherein the angle of the lower lead slope of the lower locating body (2.11) is the same as the angle of the lead slope in the slanted holder (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120203645.0U CN214836114U (en) | 2021-01-26 | 2021-01-26 | Multi-branch well bore ultra-short radius windowing sidetrack drilling recoverable positioner |
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| CN202120203645.0U CN214836114U (en) | 2021-01-26 | 2021-01-26 | Multi-branch well bore ultra-short radius windowing sidetrack drilling recoverable positioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115637945A (en) * | 2022-12-23 | 2023-01-24 | 东营市瑞丰石油技术发展有限责任公司 | Branch borehole window positioning tool |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115637945A (en) * | 2022-12-23 | 2023-01-24 | 东营市瑞丰石油技术发展有限责任公司 | Branch borehole window positioning tool |
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