CN115898327A - Rotary self-guiding type float shoe for horizontal well - Google Patents
Rotary self-guiding type float shoe for horizontal well Download PDFInfo
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- CN115898327A CN115898327A CN202310179022.8A CN202310179022A CN115898327A CN 115898327 A CN115898327 A CN 115898327A CN 202310179022 A CN202310179022 A CN 202310179022A CN 115898327 A CN115898327 A CN 115898327A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a horizontal well rotation self-guiding type float shoe, which relates to the technical field of horizontal well drilling equipment, and is characterized in that a launder cavity arranged between a main body cylinder and a positioning cone is used as a main structure for injecting cement slurry, the positioning cone is used as a static structure while injecting the cement slurry through a grouting pipe, the pressure during cement slurry injection is used as a power source, and a direction-limiting spiral flow strip and an arc flow strip in the main body cylinder are combined to enable the main body cylinder to rotate appropriately to form a static-dynamic combined rotating structure, the rotating speed of the rotating structure is in direct proportion to the injection speed of the cement slurry, so that when a casing is put in, the horizontal well drilling equipment is ensured to be put in a well in a dynamic form, and when the horizontal well drilling equipment is put in the dynamic rotating form, the first pendulum ball and the second pendulum ball are used for rotating appropriately to generate a centrifugal force matched with the main body cylinder or the positioning cone, so that the positioning cone and the main body cylinder are outward stabilized.
Description
Technical Field
The invention relates to the technical field of horizontal well drilling equipment, in particular to a rotary self-guiding type floating shoe of a horizontal well.
Background
The horizontal well is mainly used for the development of carbonate fractured reservoirs, reservoirs with gas tops or bottom water, thin-layer reservoirs, low-permeability reservoirs, heavy oil reservoirs, high-water-content artificial water injection reservoirs and the like, and mainly comprises the operations of primary drilling, secondary drilling, tripping, bit changing, drilling, well completion, electric logging, casing running, well cementing operation and the like in the drilling process;
for the well cementation operation, the purpose is to protect and support a casing in an oil and gas well, seal off oil, gas and water and other strata, the essence is the operation of filling cement in a shaft and a steel pipe annulus, wherein a horizontal well drilling device is needed to be used as a structure, the horizontal well drilling device is used as an auxiliary structure for filling cement slurry to avoid backflow of the cement slurry and is also used as an auxiliary structure for setting the casing to avoid the casing from being inserted into a well wall;
in the actual process of well drilling and well cementation, the actual well length of the horizontal well can reach thousands of meters, and the well way is not in a completely vertical state but in a multiple bending state, so that when the casing is put into the casing, the horizontal well drilling equipment is mainly in a relatively static well putting mode, the horizontal well drilling equipment is subjected to the bending well wall, the well putting difficulty of the horizontal well drilling equipment is increased, even the well wall can be scratched to damage the well way, when the current horizontal well drilling equipment is put into the well way, the relatively static well putting mode is mainly adopted, the inner wall of the well way with complex bending degree is difficult to meet, and the possibility that the horizontal well drilling equipment scratches the well wall is increased;
in view of the above technical problems, the present application proposes a solution.
Disclosure of Invention
The invention aims to provide a rotary self-guiding type floating shoe for a horizontal well, which is used for solving the problem that the inner wall of a well with complex bending degree is difficult to meet due to the fact that the motion form of the existing horizontal well drilling equipment is mainly in a static mode in the process of descending the well, and the possibility that the horizontal well drilling equipment scratches and rubs the well wall to damage the well is increased.
The purpose of the invention can be realized by the following technical scheme:
a horizontal well rotation self-guiding type float shoe comprises a main body cylinder and a slurry outlet cap, wherein the slurry outlet cap is arranged on the lower side position of the main body cylinder, a positioning cone which is vertically arranged is arranged on the central position inside the main body cylinder, a runner cavity is arranged between the inner wall of the main body cylinder and the outer wall of the positioning cone, an upper supporting block is arranged on the lower end position inside the positioning cone, a cavity is formed in the central point position inside the upper supporting block, a vertically arranged double-head ball cap rod is arranged on the central point position of the positioning cone, blocking balls are arranged on the double-head ball cap rod at the two ends of the inner wall and the outer wall of the positioning cone, a positioning plate is arranged inside the cavity in a sliding mode, the central point position of the lower end of the positioning plate is connected with the upper end position of the double-head ball cap rod, a top position spring is arranged between the bottom end of the inner wall of the cavity and the positioning plate, a sliding block is arranged at the middle end part of the double-head ball cap rod, and the sliding block is connected with the central point of the positioning cone in a sliding mode;
the upper end part of the positioning cone is cylindrical, the lower end part of the positioning cone is in an inverted cone shape, the inner wall of the main body cylinder corresponding to the upper end part of the positioning cone is provided with a direction-limiting spiral flow strip, the inner wall of the main body cylinder corresponding to the lower end part of the positioning cone is provided with a plurality of arc-shaped flow strips, the arc-shaped flow strips are arranged in an annular array along the central point of the positioning cone, and the direction-limiting spiral flow strips, the arc-shaped flow strips and the flow groove cavity are matched;
the positioning cone is internally provided with a grouting pipe, the grouting pipe is communicated with the inner part of the runner cavity, and the outer wall of the runner cavity corresponding to the ball blocking position at the lower end of the double-end ball cap rod is provided with a plurality of slurry outlets.
Further setting the following steps: and the top end of the inner wall of the positioning cone is provided with a connecting plug, and the grouting pipe is fixed in the connecting plug.
Further setting the following steps: the upper end of the main body cylinder is rotatably provided with a connecting hoop, and the connecting hoop is in threaded connection with the outer wall of the positioning cone.
Further setting the following steps: the outer wall of the top end of the positioning cone is in threaded connection with a retaining cap, and the spiral directions of the retaining cap, the connecting hoop and the outer wall of the positioning cone are opposite.
Further setting as follows: the upper support block is characterized in that an upper pressing block is mounted at the upper end of the upper support block, a plug block is mounted at the central point of the lower surface of the upper pressing block, an induction sheet is mounted at the upper end of the plug block, the cross section of the induction sheet is concave and circular-arc-shaped, a positioning signal ball is mounted at the central point of the top end inside the upper pressing block, the lower end of the positioning signal ball is connected with a power signal wire, and the lower end of the power signal wire is connected with a second swinging ball.
Further setting as follows: the induction piece is provided with a ring point and a plurality of side points, the ring point is arranged on the inner edge of the induction piece, the side points are arranged on the inner wall of the induction piece, and the side points are arranged in an annular array along the central point of the induction piece.
Further setting as follows: the utility model discloses a ball groove that is provided with in the main part section of thick bamboo and is provided with the ball groove that matches with first pendulum ball, the main part section of thick bamboo is seted up and is annular movable chamber, be provided with the activity ring in the activity chamber, be connected with a plurality of first pendulum balls on the activity ring outer wall position, it is a plurality of first pendulum ball is the annular array setting along the central point of activity ring, the activity chamber corresponds and sets up the ball groove that matches with first pendulum ball on the activity ring outer wall position.
The invention has the following beneficial effects:
1. a runner cavity is formed between a main body cylinder and a positioning cone, cement slurry for well cementation is injected into the runner cavity through a grouting pipe to enable the runner cavity to serve as a cement slurry flow channel, then the cement slurry is combined with a direction-limiting spiral flow strip and a flow strip in the flowing process, the positioning cone serves as a static structure, when the cement slurry flows through the runner cavity, the main body cylinder forms a dynamic rotating structure relative to the positioning cone through internal force generated in the cement slurry flow channel, the main body cylinder can rotate around the positioning cone appropriately, and then in the well descending process, the whole horizontal well drilling equipment structure forms a self-guide rotating structure, so that horizontal well drilling equipment can drive a casing to descend the well conveniently;
2. the dynamic rotation form of cooperation main part section of thick bamboo, all be provided with two sets of free pendulum structures in location cone and main part section of thick bamboo, the free motion that produces under the effect of gravity of geocentric gravity by first pendulum ball and second pendulum ball in two sets of free pendulum structures comes the cooperation dynamic rotation, wherein the free pendulum structure in the location cone set up the purpose and cooperate the lower well angle that tentatively detects whole horizontal well drilling equipment structure, wherein first pendulum ball "follows" dynamic rotation and swing in order in the free pendulum structure in the main part section of thick bamboo, the rotatory action through a plurality of first pendulum balls produces centrifugal force, produce the yawing force to a main part section of thick bamboo, play preliminary stable effect to a main part section of thick bamboo.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a horizontal well rotary self-guiding float shoe provided by the invention;
fig. 2 is a sectional view of fig. 1 in a horizontal well rotary self-guiding float shoe according to the present invention;
FIG. 3 is a disassembled view of FIG. 1 in a horizontal well rotary self-guiding float shoe according to the present invention;
FIG. 4 is a cut-away view of the retaining cap, the connecting hoop and the main body cylinder part of the horizontal well rotary self-guiding float shoe according to the present invention;
FIG. 5 is a sectional view of a positioning cone component in a horizontal well rotary self-guiding float shoe according to the present invention;
FIG. 6 is a sectional view of a main body tube part in the horizontal well rotary self-guiding float shoe according to the present invention;
fig. 7 is a schematic structural diagram of a double-headed ball cap rod component in a horizontal well rotary self-guiding type float shoe according to the present invention;
FIG. 8 is a sectional view of an upper pressing block component in the horizontal well rotary self-guiding type float shoe provided by the invention;
fig. 9 is a schematic structural diagram of a part a of a horizontal well rotary self-guiding type float shoe according to the present invention.
In the figure: 1. a main body cylinder; 2. a connecting hoop; 3. a backstop cap; 4. grouting pipes; 5. discharging a pulp cap; 6. a connecting plug; 7. pressing the blocks; 8. an upper supporting block; 9. positioning a cone; 10. a runner cavity; 11. an induction sheet; 12. a first pendulum ball; 13. a movable ring; 14. a flanking site; 15. a loop site; 16. a slider; 17. a double-ended ball cap stem; 18. a direction-limiting spiral flow strip; 19. arc-shaped flowing strips; 20. a movable cavity; 2001. a ball groove; 21. a pulp outlet; 22. a cavity; 23. positioning a plate; 24. a top position spring; 25. a power supply signal line; 26. positioning a signal ball; 27. a second pendulum ball; 28. and (6) a chock block.
Detailed Description
The technical solutions of the present invention will be described in detail and fully below with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
In the drilling operation of the horizontal well, the formed well is not completely vertical or completely horizontal, and the actual well is in a multi-bending shape, so in the well cementation operation of the horizontal well, structures such as horizontal well drilling equipment and the like are required to be used as guide shoes or structures for pouring cement slurry, the difficulty of the horizontal well drilling equipment in a static mode in the well descending is high, and the following technical scheme is provided for the purpose:
referring to fig. 1 to 9, the horizontal well rotary self-guiding type float shoe in this embodiment includes a main body cylinder 1 and a slurry outlet cap 5, the slurry outlet cap 5 is disposed at a lower side position of the main body cylinder 1, and a positioning cone 9 vertically disposed is disposed at a central position inside the main body cylinder 1, a runner cavity 10 is disposed between an inner wall of the main body cylinder 1 and an outer wall of the positioning cone 9, an upper supporting block 8 is mounted at a lower end position inside the positioning cone 9, a cavity 22 is disposed at a central point inside the upper supporting block 8, a double-headed ball cap rod 17 vertically disposed is disposed at a central point position of the positioning cone 9, two blocking balls are mounted at two ends of the double-headed ball cap rod 17, a positioning plate 23 is slidably mounted inside the cavity 22, a central point position of a lower end of the positioning plate 23 is connected with an upper end position of the double-headed ball cap rod 17, a top spring 24 is disposed between a bottom end of the inner wall of the cavity 22 and the positioning plate 23, a sliding block 16 is mounted at a middle end portion of the double-headed ball cap rod 17, and the sliding block 16 is slidably connected with the central point of the positioning cone 9;
the upper end part of the positioning cone 9 is cylindrical, the lower end part of the positioning cone 9 is in an inverted cone shape, the inner wall of the main body cylinder 1 corresponding to the upper end part of the positioning cone 9 is provided with a direction-limiting spiral flow strip 18, the inner wall of the main body cylinder 1 corresponding to the lower end part of the positioning cone 9 is provided with a plurality of arc-shaped flow strips 19, the plurality of arc-shaped flow strips 19 are arranged in an annular array along the central point of the positioning cone 9, and the direction-limiting spiral flow strips 18, the arc-shaped flow strips 19 and the flow groove cavity 10 are matched;
the inside slip casting pipe 4 that is provided with of location cone 9, slip casting pipe 4 and chute chamber 10 inside intercommunication, and a plurality of grout outlets 21 have been seted up on the outer wall position that chute chamber 10 corresponds the stifled ball position of double-end spherical cap pole 17 lower extreme.
In the using process, the horizontal well drilling equipment structure is connected with a casing structure used in the process of descending, the descending process is not described herein, and what needs to be described in particular is that: one end of the grouting pipe 4 needs to be connected with a grouting structure;
in the actual use process, the method comprises the following steps:
the method comprises the following steps: the main body cylinder 1 is used as a main structure in a well, namely the main body cylinder 1 is used as a direct structure contacting a well wall, in the well descending process, the positioning cone 9 is a static structure relative to the main body cylinder 1, the main body cylinder 1 is a dynamic structure relative to the positioning cone 9, a certain correlation exists between the two structures, cement slurry is injected into a launder cavity 10 formed between the dynamic structure and the static structure through the grouting pipe 4, when the cement slurry flows into the launder cavity 10, the cement slurry firstly flows along a direction-limiting spiral flow strip 18, and the cement slurry flowing into the inside of the launder cavity 10 is enabled to flow in a spiral downward direction under the action of the direction-limiting spiral flow strip 18 by referring to the shape of the direction-limiting spiral flow strip 18 in fig. 6;
step two: when the cement slurry flows out from the lowest side of the direction-limiting spiral flow strip 18, the cement slurry enters the area of the arc-shaped flow strip 19 again, so that the flowing direction of the cement slurry is interfered by the arc-shaped flow strip 19 again;
step three: at last grout flows into the downside of chute cavity 10, refer to fig. 2 and fig. 9, along with the continuous pouring of grout, its inside grout pressure risees, until pressure surpasss the elasticity of top position spring 24 to drive double-end spherical cap pole 17 downstream, then expose grout outlet 21, grout discharges along grout outlet 21, discharges along grout outlet 5 at last, when stopping pouring grout, under the resilience effect of top position spring 24, drive double-end spherical cap pole 17 and reset and plug up grout outlet 21.
In combination with the internal steps I, II and III, the flowing process of the cement paste is interfered by the spiral flow strips 18 and the arc flow strips 19, in this state, the positioning cone 9 is in a relatively static state, the force generated when the cement paste is interfered is transmitted to the main body cylinder 1 in a mode of reacting force, and then the main body cylinder 1 can be driven to perform a self-guiding dynamic rotation mode in the flowing direction of the cement paste, so that the dynamic rotation mode is convenient for the well descending process.
Example two
The embodiment is matched with the dynamic rotation mode of the embodiment, optimizes the installation mode of the whole structure, and specifically comprises the following steps:
install on 9 inner walls top positions of location cone and connect stopper 6, slip casting pipe 4 is fixed in connecting stopper 6, rotates on 1 upper end positions of a main part section of thick bamboo and installs the connector hoop 2, is threaded connection between connector hoop 2 and the 9 outer walls of location cone, and threaded connection has stopping cap 3 on 9 top outer walls of location cone position, and is opposite between the spiral direction of stopping cap 3, connector hoop 2 and the 9 outer walls of location cone.
The working principle is as follows: as shown in the first embodiment, the positioning cone 9 is in a static structure, and the main body cylinder 1 is in a dynamic structure, but in the actual installation process, the installation stability among the components needs to be ensured, and for this reason, the following installation methods are proposed:
a-1: wherein the positioning cone 9 is connected with the connecting hoop 2, and the connecting hoop 2 is rotationally connected with the main body cylinder 1, so that an integrated structure is formed between the main body cylinder 1 and the positioning cone 9, but the self-guiding rotation process of the main body cylinder 1 is not influenced;
a-2: the retaining cap 3 is connected to the positioning cone 9 again, so that the connecting hoop 2 is reinforced for the second time, the connection stability of the whole structure is ensured, and the connecting hoop also serves as an installation structure of the connecting plug 6;
in connection with the interior of a-1 and a-2, it is necessary to ensure that the direction of the threads between the coupling 2 and the retaining cap 3 and the positioning cone 9 is opposite, with the aim that during a continuous self-guided rotation the retaining cap 3 comes loose with respect to the coupling 2 and the stability of the connection between the parts is affected.
EXAMPLE III
In this embodiment, based on the dynamic rotation manner of the first embodiment, the following contents are added:
an upper pressing block 7 is installed at the upper end position of an upper supporting block 8, a plug block 28 is installed at the central point position of the lower surface of the upper pressing block 7, a sensing piece 11 is installed at the upper end position of the plug block 28, the cross section of the sensing piece 11 is concave and circular arc-shaped, a positioning signal ball 26 is installed at the central point position of the top end inside the upper pressing block 7, a power signal wire 25 is connected to the lower end of the positioning signal ball 26, a second swing ball 27 is connected to the lower end of the power signal wire 25, a ring site 15 and a plurality of side sites 14 are arranged in the sensing piece 11, the ring site 15 is arranged on the outer edge of the inner side of the sensing piece 11, the side sites 14 are arranged on the inner wall position of the sensing piece 11, the side sites 14 are arranged in an annular array along the central point position of the sensing piece 11, an annular movable cavity 20 is formed in a main body cylinder 1, a movable ring 13 is arranged in the movable cavity 20, a movable ring 2001 is connected to the outer wall position of the movable ring 13, a plurality of first swing balls 12 are arranged in an annular array along the central point of the movable ring 13, and a ball groove matched with the first swing ball 12 is formed in the outer wall position of the movable cavity 20.
The advantages are that: according to the well of the current horizontal well, the well does not present a completely vertical or completely horizontal state, and the following two modes are added for the purpose:
b-1: with reference to the dynamic rotation mode in the first embodiment, in the shaft in a relatively vertical state, under the action of gravity, theoretically, the second pendulum ball 27 is always kept consistent with the direction of gravity, and referring to fig. 8, in the initial state of the second pendulum ball 27, the second pendulum ball 27 is not in contact with the side point 14 or the ring point 15, a closed circuit is not formed among the second pendulum ball 27, the power signal line 25 and the positioning signal ball 26, but the actual shaft is in a multiple-bending shape, so in actual situations, the second pendulum ball 27 touches the side point 14 in a corresponding position along with the angle switching of the shaft, and a closed circuit is formed among the second pendulum ball 27, the power signal line 25 and the positioning signal ball 26, so that the actual angle of the horizontal well drilling equipment is fed back;
b-1 is described, wherein a current electric signal conversion principle can be referred to for a circuit among the second pendulum ball 27, the power signal line 25 and the positioning signal ball 26, and the principle is that electric power is converted into a digital signal, and a corresponding image is fed back by the digital signal, which is not described herein in detail, and the content of this section is only used as an auxiliary structure in the whole horizontal well drilling equipment structure;
b-2: referring to B-1, when the second pendulum ball 27 contacts the ring position 15, the horizontal well drilling equipment at this time can be laterally fed back to be in a relatively horizontal state, in combination with the dynamic rotation process in the first embodiment, and referring to fig. 4, along with the self-guided rotation of the main body cylinder 1, the movable ring 13 can also be indirectly driven to rotate, and then the plurality of first pendulum balls 12 are driven to perform annular motion, and an outward centrifugal force is generated by the annular motion of the plurality of first pendulum balls 12.
In conclusion: the flow groove cavity arranged between the main body cylinder and the positioning cone is used as a main structure for pouring cement paste, the positioning cone is used as a static structure when the cement paste is poured into the main body cylinder through the grouting pipe, the pressure when the cement paste is poured into the main body cylinder is used as a power source, and the direction-limiting spiral flow strip and the arc-shaped flow strip inside the main body cylinder are combined, so that the main body cylinder can rotate appropriately to form a static-dynamic combined rotating structure, the rotating speed of the rotating structure is in direct proportion to the pouring speed of the cement paste, therefore, when the casing is put into the horizontal well, the horizontal well drilling equipment is guaranteed to be put into the well in a dynamic form, when the horizontal well drilling equipment is put into the well in a dynamic rotating form, the first pendulum ball and the second pendulum ball are used for rotating appropriately, the centrifugal force matched with the main body cylinder or the positioning cone is generated, and the aim of outward stabilization is to the positioning cone and the main body cylinder.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The rotary self-guiding type float shoe for the horizontal well comprises a main body cylinder (1) and a slurry outlet cap (5), and is characterized in that the slurry outlet cap (5) is arranged at the lower side position of the main body cylinder (1), a positioning cone (9) which is vertically arranged is arranged at the central position inside the main body cylinder (1), a runner cavity (10) is arranged between the inner wall of the main body cylinder (1) and the outer wall of the positioning cone (9), an upper supporting block (8) is arranged at the lower end position inside the positioning cone (9), a cavity (22) is arranged at the central point position inside the upper supporting block (8), a double-end ball cap rod (17) which is vertically arranged is arranged at the central point position of the positioning cone (9), blocking balls are arranged at the two ends of the inner wall and the outer wall of the positioning cone (9) of the double-end ball cap rod (17), a positioning plate (23) is arranged inside the cavity (22) in a sliding mode, a positioning plate (23) is arranged at the lower end position of the double-end ball cap rod (17), a top spring (24) is arranged between the bottom end position of the cavity (22) and a sliding block (16) is arranged at the central point position of the sliding block (16);
the upper end part of the positioning cone (9) is cylindrical, the lower end part of the positioning cone (9) is in an inverted cone shape, a direction-limiting spiral flow strip (18) is installed on the inner wall position, corresponding to the upper end part of the positioning cone (9), of the main body cylinder (1), a plurality of arc-shaped flow strips (19) are installed on the inner wall position, corresponding to the lower end part of the positioning cone (9), of the main body cylinder (1), the arc-shaped flow strips (19) are arranged in an annular array along the central point of the positioning cone (9), and the direction-limiting spiral flow strip (18), the arc-shaped flow strips (19) are matched with the runner cavity (10);
the positioning cone (9) is internally provided with a grouting pipe (4), the grouting pipe (4) is communicated with the interior of the runner cavity (10), and the runner cavity (10) is provided with a plurality of grout outlets (21) corresponding to the outer wall of the ball blocking position at the lower end of the double-end spherical cap rod (17).
2. The horizontal well rotating self-guiding type float shoe according to claim 1 is characterized in that a connecting plug (6) is installed at the top end of the inner wall of the positioning cone (9), and the grouting pipe (4) is fixed in the connecting plug (6).
3. The horizontal well rotation self-guiding type float shoe according to claim 1 is characterized in that a connecting hoop (2) is rotatably mounted at the upper end of the main body cylinder (1), and the connecting hoop (2) is in threaded connection with the outer wall of the positioning cone (9).
4. The horizontal well rotary self-guiding type float shoe according to claim 3, wherein the outer wall of the top end of the positioning cone (9) is in threaded connection with a retaining cap (3), and the spiral directions of the retaining cap (3), the connecting hoop (2) and the outer wall of the positioning cone (9) are opposite.
5. The horizontal well rotating self-guiding type float shoe is characterized in that an upper pressing block (7) is installed at the upper end of an upper supporting block (8), a plug block (28) is installed at the central point of the lower surface of the upper pressing block (7), an induction sheet (11) is installed at the upper end of the plug block (28), the cross section of the induction sheet (11) is in the shape of an inwards concave arc, a positioning signal ball (26) is installed at the central point of the top end inside the upper pressing block (7), the lower end of the positioning signal ball (26) is connected with a power signal wire (25), and the lower end of the power signal wire (25) is connected with a second swinging ball (27).
6. The horizontal well rotation self-guiding type floating shoe is characterized in that a ring point (15) and a plurality of side points (14) are arranged in the induction sheet (11), the ring point (15) is arranged on the inner outer edge of the induction sheet (11), the side points (14) are arranged on the inner wall of the induction sheet (11), and the side points (14) are arranged in an annular array along the central point of the induction sheet (11).
7. The horizontal well rotating self-guiding type float shoe is characterized in that an annular movable cavity (20) is formed in the main body cylinder (1), a movable ring (13) is arranged in the movable cavity (20), a plurality of first swing balls (12) are connected to the outer wall of the movable ring (13) in an annular array mode along the central point of the movable ring (13), and a ball groove (2001) matched with the first swing balls (12) is formed in the position, corresponding to the outer wall of the movable ring (13), of the movable cavity (20).
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| CN202310179022.8A CN115898327B (en) | 2023-03-01 | 2023-03-01 | Rotary self-guiding type floating shoe for horizontal well |
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| CN202310179022.8A CN115898327B (en) | 2023-03-01 | 2023-03-01 | Rotary self-guiding type floating shoe for horizontal well |
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| CN115898327B CN115898327B (en) | 2023-05-02 |
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