Optical fiber while-drilling anchoring device and drill rod monitoring system

Abstract

The invention relates to the technical field of well drilling, and provides an optical fiber while-drilling anchoring device and a drill rod monitoring system.The optical fiber while-drilling anchoring device comprises an anchoring part and a driving part, the anchoring part comprises a push rod, an end rod, an end ring and a plurality of umbrella ribs, and the push rod and the end rod are oppositely arranged; the end rod is sleeved with the end ring. One end of the umbrella rib is hinged to the push rod, and the other end is hinged to the end ring; one end of the driving part is connected with the anchoring part, the other end is provided with a wire bin, and the driving part is used for driving the push rod to move to expand or contract the umbrella ribs. The umbrella ribs are connected with the push rod and the end ring, so that under the driving of the driving part, the multiple umbrella ribs expand to abut against the inner wall of the drill rod, and relative fixation with the drill rod is achieved; the optical fiber is fixedly arranged on the outer wall of the anchoring device and can be connected with various sensors in the drill rod after penetrating through the space between the two umbrella ribs; when the drill rod rotates, the wire bin and the optical fiber rotate synchronously, so that stability of the optical fiber is guaranteed, and breakage caused by distortion and friction is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of drilling, and in particular to an optical fiber anchoring device while drilling and a drill pipe monitoring system. Background Art

[0002] As my country's oil and gas exploration and development continues to advance into complex oil and gas fields such as low permeability, unconventional, deep and ultra-deep, and deep water, it poses major challenges to the efficiency, safety, and quality of drilling projects, and it is urgent to develop revolutionary new methods and technologies for downhole measurement while drilling. The current measurement while drilling technology cannot achieve fully automated intelligent drilling and completion due to the low communication transmission rate. Fiber-optic communication while drilling technology is an advanced communication technology used in the oil and gas industry.

[0003] The existing patent application with application publication number CN107143328A discloses a fiber optic communication device while drilling, including: a rotating wireless transceiver module; the rotating wireless transceiver module is fixed on a protection joint; the active antenna of the rotating wireless transceiver module is placed in the first drill pipe by drilling a hole in the protection joint; the fiber optic communication winch is located at the top of the second drill pipe, the optical fiber released downward is placed in other drill pipes underground, and the lower part of the optical fiber is connected to a bottom hole wireless receiving module; the lower part of the drill pipe is a drilling and production data acquisition device and a bottom hole wireless transmitting module.

[0004] As in the above technical solution, the fiber optic communication winch is located at the top of the second drill rod, and the optical fiber is hoisted inside the drill rod. As the drill rod rotates continuously, the optical fiber inside will be unstable, and there will be torque and friction between the two due to relative rotation. In addition, mud is constantly flowing inside some drill rods, which will wash the optical fiber, causing the optical fiber to continuously twist and rub, and be subjected to excessive stress, which may eventually cause it to break; especially under conditions of high rotation speed and long-term operation, the durability of the optical cable will be greatly tested; therefore, it is urgent to improve the layout structure of the optical fiber in the drill rod. Summary of the invention

[0005] In view of this, the present invention proposes an optical fiber anchoring device and a drill rod monitoring system for fixing an optical fiber to a drill rod, so as to solve the problem that the existing optical fiber is easily damaged due to excessive stress when it is hoisted.

[0006] The technical solution of the present invention is achieved in this way:

[0007] In one aspect, the present invention provides an optical fiber anchoring device while drilling, comprising an anchoring part and a driving part, wherein the anchoring part comprises a push rod, an end rod, an end ring and a plurality of ribs, wherein:

[0008] The push rod and the end rod are arranged opposite to each other;

[0009] The end ring is sleeved on the end rod;

[0010] One end of the rib is hinged to the push rod, and the other end is hinged to the end ring;

[0011] One end of the driving part is connected to the anchoring part, and the other end is equipped with a wire bin. The driving part is used to drive the push rod to move so as to expand or contract the umbrella ribs.

[0012] On the basis of the above technical solution, preferably, it further includes a guide cone and a guide rod, wherein:

[0013] One end of the guide cone is connected to the end rod, and the other end is the guide end;

[0014] One end of the guide rod abuts against the guide cone, and the other end passes through the end rod and is inserted into the push rod.

[0015] On the basis of the above technical solution, preferably, the anchoring part further includes a screw and a sleeve, and the guide cone and the end rod are screwed together by threads, wherein:

[0016] The end ring is fixedly connected to the end rod by screws, and the end ring is a stepped cylindrical structure;

[0017] One end of the sleeve is sleeved on the small diameter end of the end ring, and the other end is sleeved on the guide cone;

[0018] The large diameter end of the end ring corresponds to one end of the umbrella rib, and the other end of the umbrella rib corresponds to the stepped surface of the push rod.

[0019] On the basis of the above technical solution, preferably, the anchoring part further includes a fixing tube, one end of which is connected to the driving part, and the other end of which is connected to the end rod;

[0020] The push rod is located in the fixing tube, and the fixing tube is provided with an umbrella groove for the umbrella rib to extend out.

[0021] On the basis of the above technical solution, preferably, the ribs include a first connecting rod, an anchor shoe and a second connecting rod, wherein:

[0022] One end of the first connecting rod is hinged to the push rod;

[0023] One end of the anchor shoe is hinged to the other end of the first connecting rod, and the anchor shoe is provided with oblique teeth;

[0024] One end of the second connecting rod is hinged to the other end of the anchor shoe, and the other end of the second connecting rod is hinged to the end ring.

[0025] On the basis of the above technical solution, preferably, the driving part includes a balancing joint, a first sleeve, a second sleeve, a motor and a transmission member, wherein:

[0026] The balancing joint, the first sleeve and the second sleeve are connected in sequence and communicate with each other, and the end of the balancing joint away from the first sleeve is connected to the anchoring part;

[0027] The motor is arranged in the second casing;

[0028] The transmission member is arranged in the balancing joint and the first sleeve, and is connected with the main shaft of the motor and the push rod, so as to convert the rotational motion of the main shaft of the motor into the linear motion of the push rod.

[0029] On the basis of the above technical solution, preferably, the transmission member includes a coupling, a screw rod, a guide frame and a nut frame, wherein:

[0030] One end of the coupling is connected to the main shaft of the motor, and the other end is connected to the lead screw;

[0031] The guide frame is fixedly arranged in the first sleeve and is rotatably connected to the end of the screw rod;

[0032] The nut frame is connected to the lead screw through threads and is slidably matched with the guide frame, and the nut frame is connected to the push rod.

[0033] On the basis of the above technical solution, preferably, the transmission member further includes a plunger push rod and a support joint, and the anchoring portion further includes a side plate, wherein:

[0034] There are two side plates at the end of the push rod;

[0035] One end of the plunger push rod is clamped with the two side plates, and the other end is connected with the nut frame;

[0036] One end of the supporting joint is connected to the balancing joint and supports the two side plates, and the other end of the supporting joint is inserted into the plunger push rod.

[0037] On the basis of the above technical solution, preferably, the balancing joint and the first sleeve are both in a stepped cylindrical structure, wherein:

[0038] The large diameter section of the balancing joint is connected to the anchoring portion, and the small diameter section of the balancing joint is inserted into the large diameter section of the first casing;

[0039] The small diameter section of the first sleeve is inserted into the large diameter section of the second sleeve;

[0040] The side plate and the plunger push rod form a multi-level stepped structure, and the small diameter section of the plunger push rod is slidably matched with the small diameter section of the balance joint and is connected to the nut frame;

[0041] The screw rod, the guide frame and the nut frame are located in the large diameter section of the first sleeve;

[0042] The coupling is rotatably arranged in the small diameter section of the first sleeve.

[0043] On the other hand, the present invention provides a drill pipe monitoring system, comprising the above-mentioned optical fiber anchoring device while drilling.

[0044] The optical fiber anchoring device while drilling and the drill pipe monitoring system of the present invention have the following beneficial effects compared with the prior art:

[0045] (1) By connecting the ribs with the push rod and the end ring, the ribs will expand under the drive of the driving unit to hold the inner wall of the drill pipe and achieve relative fixation with the drill pipe; the optical fiber is fixedly arranged on the outer wall of the anchoring device and passes through between the two ribs to connect various sensors in the drill pipe; when the drill pipe rotates, the wire bin and the optical fiber will rotate synchronously to ensure the stability of the optical fiber, thereby avoiding twisting and friction and causing breakage;

[0046] (2) By setting a guide cone and a guide rod, the guide cone can guide the movement of the anchor device in the drill pipe, and the guide rod passes through the end rod and is inserted into the push rod, so that the push rod can be oriented to ensure the stability of the movement;

[0047] (3) In the structure of the driving part, the balancing joint and the first sleeve are arranged as a stepped cylindrical structure and are plugged into each other, while the side plate and the plunger push rod, the coupling and the guide frame used for transmission are arranged in a stepped shape, so that they can adapt to the internal space of the balancing joint and the first sleeve, thereby ensuring that the overall structure is compact and the outer surface of the anchoring device is flat, which is conducive to advancement in the drill pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 It is a front view of the optical fiber anchoring device while drilling of the present invention;

[0050] Figure 2 For the present invention Figure 1 Middle AA section view;

[0051] Figure 3 It is a cross-sectional view of the anchoring portion of the optical fiber anchoring device while drilling of the present invention;

[0052] Figure 4 It is a partial cross-sectional view of the driving part of the optical fiber anchoring device while drilling of the present invention;

[0053] Figure 5 A cross-sectional view of the motor layout structure of the optical fiber anchoring device while drilling of the present invention;

[0054] Figure 6 It is a three-dimensional diagram of the exploded structure of the optical fiber anchoring device while drilling of the present invention;

[0055] Figure 7This is a front view of the exploded structure of the optical fiber anchoring device while drilling of the present invention;

[0056] Figure 8 It is a partial stereoscopic diagram of the driving part of the optical fiber anchoring device while drilling of the present invention;

[0057] Fig. 9 It is a partial stereoscopic view of the anchoring portion of the optical fiber anchoring device while drilling of the present invention;

[0058] In the figure: 1. anchoring part; 11. push rod; 12. end rod; 13. end ring; 14. umbrella rib; 141. first connecting rod; 142. anchor shoe; 1421. oblique teeth; 143. second connecting rod; 15. screw; 16. sleeve; 17. fixing cylinder; 18. side plate; 101. stepped surface; 102. umbrella groove; 2. driving part; 21. balancing joint; 22. first sleeve; 23. second sleeve; 24. motor; 25. transmission part; 251. coupling; 252. screw rod; 253. guide frame; 2531. bearing seat; 254. nut frame; 2541. ring plate; 2542. connecting rod; 2543. nut seat; 255. plunger push rod; 256. support joint; 3. guide cone; 4. guide rod. DETAILED DESCRIPTION

[0059] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] like Figures 1 to 9 As shown, the optical fiber anchoring device while drilling of the present invention comprises an anchoring part 1, a driving part 2, a guide cone 3 and a guide rod 4.

[0061] like Figure 1 to Figure 3 As shown, the anchoring part 1 includes a push rod 11, an end rod 12, an end ring 13 and a plurality of ribs 14, wherein the push rod 11 and the end rod 12 are arranged opposite to each other; the end ring 13 is sleeved on the end rod 12; one end of the rib 14 is hinged on the push rod 11, and the other end is hinged on the end ring 13; one end of the driving part 2 is connected to the anchoring part 1, and the other end is equipped with a wire bin, and the driving part 2 is used to drive the push rod 11 to move so as to expand or contract the rib 14;

[0062] As in the above structure, the push rod 11 and the end ring 13 are respectively used to connect the two ends of the umbrella rib 14, so that when the driving part 2 drives the push rod 11 to move, the umbrella rib 14 can expand outward, thereby abutting against the inner wall of the drill rod, thereby achieving relative fixation of the anchor part 1 and the drill rod, and then fixing the wire bin;

[0063] The end rod 12 is used to install the end ring 13, and is on the same axis as the push rod 11, so that the multiple ribs 14 can be evenly expanded to ensure the holding force on the inner wall of the drill pipe;

[0064] When laying optical fiber, the optical fiber released from the wire bin passes between two umbrella ribs 14, so as to avoid interference with the expansion of the umbrella ribs 14. After the umbrella ribs 14 press against the inner wall of the drill pipe, the wire bin and the drill pipe rotate simultaneously, so that there is no relative friction and no distortion, which can effectively prevent the optical fiber from being damaged by force, thereby ensuring the stability of signal transmission.

[0065] In some embodiments, the end ring 13 is used to adjust the initial posture of the umbrella rib 14. In this structure, the end ring 13 slides with the end rod 12 and can be selectively fixed by bolts to adjust the initial expansion angle of the umbrella rib 14 so that the umbrella rib 14 remains in a protruding state. In this way, when the anchoring device enters the drill pipe, even if it shakes and collides, only the umbrella rib 14 hits the inner wall of the drill rod, thereby avoiding damage to the optical fiber.

[0066] like Figure 2 , Figure 3 , Figure 6 , Figure 7 and Fig. 9 As shown, one end of the guide cone 3 is connected to the end rod 12, and the other end is a guide end; one end of the guide rod 4 abuts against the guide cone 3, and the other end passes through the end rod 12 and is inserted into the push rod 11;

[0067] As in the above structure, the guide cone 3 is located at the end of the anchoring device and is used to guide the movement inside the drill rod, and the guide rod 4 passes through the end rod 12 and is inserted into the push rod 11, so that the push rod 11 can be oriented to ensure the relative movement stability between the push rod 11 and the end ring 13, thereby ensuring the stability of the movement of the umbrella rib 14;

[0068] The guide rod 4 is configured as a stepped rod, and after being inserted into the end rod 12, the guide cone 3 is assembled onto the end rod 12 to abut against the end of the guide rod 4 for locking and fixing.

[0069] In some embodiments, the guide cone 3 and the guide rod 4 are configured as an integrated structure, which can be assembled synchronously with the end rod 12 .

[0070] like Figure 3 As shown, the anchoring part 1 further includes a screw 15 and a sleeve 16, and the guide cone 3 and the end rod 12 are screwed together, wherein the end ring 13 is fixedly connected to the end rod 12 by the screw 15, and the end ring 13 is a stepped cylindrical structure; one end of the sleeve 16 is sleeved on the small diameter end of the end ring 13, and the other end is sleeved on the guide cone 3; the large diameter end of the end ring 13 corresponds to one end of the umbrella rib 14, and the other end of the umbrella rib 14 corresponds to the stepped surface 101 of the push rod 11;

[0071] As in the above structure, the guide cone 3 is connected to the end rod 12 by screwing, which can ensure the convenience of disassembly and assembly. In order to avoid the threaded connection being unable to be disassembled and assembled due to foreign matter, a sleeve 16 is provided;

[0072] The end ring 13 for mounting the rib 14 is configured as a stepped cylindrical structure, and the end ring 13 is opposite to the guide cone 3. When the sleeve 16 is assembled, the sleeve 16 simultaneously sleeves the end ring 13 and the guide cone 3, and can cover the threaded connection between the guide cone 3 and the end rod 12, thereby playing a protective role.

[0073] The end ring 13 is connected to the end rod 12 by screws 15. When the sleeve 16 is assembled, the screws 15 are covered for protection.

[0074] Specifically, the sleeve 16 is screwed and connected to the end ring 13 by means of threads;

[0075] Among them, one end of the umbrella rib 14 corresponds to the large diameter end of the end ring 13, and the other end corresponds to the step surface 101 of the push rod 11. In this way, even if the connection structure between the umbrella rib 14, the push rod 11 and the end ring 13 fails, the umbrella rib 14 can be clamped by relying on the step surface 101 and the end ring 13, so as to ensure the stability of the umbrella rib 14, so that it can still be withdrawn from the drill pipe when the connection fails, thereby avoiding remaining inside the drill pipe.

[0076] like Figure 3 , Figure 6 and Figure 7 As shown, the anchoring part 1 further includes a fixing tube 17, one end of which is connected to the driving part 2, and the other end is connected to the end rod 12; the push rod 11 is located in the fixing tube 17, and the fixing tube 17 is provided with an umbrella groove 102 for the umbrella rib 14 to extend out;

[0077] As in the above structure, the fixing tube 17 is used to support the push rod 11 to slide on one hand, and to connect the end rod 12 on the other hand, thereby fixing the end ring 13 and supporting the rib 14;

[0078] The fixing tube 17 is also provided with an umbrella groove 102 for accommodating the umbrella rib 14, so that the umbrella rib 14 can extend out to abut against the inner wall of the drill rod;

[0079] The push rod 11 is provided with an opening corresponding to the umbrella groove 102 to reserve a space for accommodating the umbrella rib 14 , and the end of the umbrella rib 14 is placed in the opening groove of the push rod 11 ; at the same time, the opening forms the above-mentioned stepped surface 101 .

[0080] like Figure 3 and Fig. 9As shown, the rib 14 includes a first connecting rod 141, an anchor shoe 142, and a second connecting rod 143, wherein one end of the first connecting rod 141 is hinged to the push rod 11; one end of the anchor shoe 142 is hinged to the other end of the first connecting rod 141, and the anchor shoe 142 is provided with a helical tooth 1421; one end of the second connecting rod 143 is hinged to the other end of the anchor shoe 142, and the other end of the second connecting rod 143 is hinged to the end ring 13;

[0081] As in the above structure, the rib 14 is composed of a first connecting rod 141, an anchor shoe 142 and a second connecting rod 143, wherein the first connecting rod 141 and the second connecting rod 143 are relatively located at two ends of the anchor shoe 142, and are respectively connected to the push rod 11 and the end ring 13, so that when the push rod 11 and the end ring 13 move relatively, the first connecting rod 141, the anchor shoe 142 and the second connecting rod 143 rotate relatively, so that the ring diameter can be changed, thereby resisting the inner wall of the drill pipe;

[0082] The anchor shoe 142 is provided with oblique teeth 1421, and the direction of the oblique teeth 1421 is opposite to the rotation direction of the drill rod, so that the anchor shoe 142 can tightly bite the inner wall of the drill rod to ensure the stability of the support.

[0083] like Figure 2 As shown, the driving part 2 includes a balancing joint 21, a first sleeve 22, a second sleeve 23, a motor 24 and a transmission member 25, wherein the balancing joint 21, the first sleeve 22 and the second sleeve 23 are connected in sequence and communicated with each other, and the balancing joint 21 is connected to the anchoring part 1 at an end away from the first sleeve 22; the motor 24 is arranged in the second sleeve 23; the transmission member 25 is arranged in the balancing joint 21 and the first sleeve 22, and the transmission member 25 is connected to the main shaft of the motor 24 and the push rod 11, so as to convert the rotational motion of the main shaft of the motor 24 into the linear motion of the push rod 11;

[0084] As in the above structure, the balancing joint 21 is used as a relay component to achieve connection with the anchoring part 1;

[0085] The motor 24 is a power element and is disposed in the second sleeve 23; the transmission member 25 is used for power transmission and conversion of motion mode and is disposed in the balancing joint 21 and the first sleeve 22;

[0086] In this way, the motor 24, the transmission member 25 and the anchoring part 1 are arranged in a distributed manner to form a modular structure, which has the advantage of being easy to disassemble, assemble and maintain.

[0087] like Figure 4 and Figure 8As shown, the transmission member 25 includes a coupling 251, a screw rod 252, a guide frame 253 and a nut frame 254, wherein one end of the coupling 251 is connected to the main shaft of the motor 24, and the other end is connected to the screw rod 252; the guide frame 253 is fixedly arranged in the first sleeve 22 and is rotatably connected to the end of the screw rod 252; the nut frame 254 is connected to the screw rod 252 by threads, and is slidably matched with the guide frame 253, and the nut frame 254 is connected to the push rod 11;

[0088] As shown in the above structure, the coupling 251 is used for connecting the main shaft of the motor 24 with the screw rod 252. When the screw rod 252 rotates, since the nut frame 254 and the guide frame 253 are slidably matched, and the guide frame 253 is fixedly connected to the first sleeve 22, the rotational motion of the screw rod 252 can be converted into the linear motion of the nut frame 254 and the push rod 11, thereby driving the umbrella rib 14 to open and close;

[0089] The guide frame 253 is a hollow structure, and a bearing seat 2531 is provided inside. The end of the screw rod 252 is rotatably connected to the bearing seat 2531. A ring plate 2541 is provided on each side of the bearing seat 2531, and a nut seat 2543 is provided on one of the ring plates 2541. The nut seat 2543 is threadedly connected to the screw rod 252.

[0090] The two ring plates 2541 are connected by two connecting rods 2542, and the connecting rods 2542 abut against the bearing seat 2531, so that the nut frame 254 is positioned relative to the screw rod 252 in the circumferential direction during the movement, and the stability of the movement can be ensured;

[0091] Specifically, the guide frame 253 is provided with a rectangular through slot, and two ring plates 2541 are provided with a plane against the inner wall of the guide frame 253 to ensure the stability of the movement;

[0092] Specifically, the bearing seat 2531 is connected and fixed to the guide frame 253 by bolts to ensure the convenience of disassembly and assembly.

[0093] like Figure 4 As shown, the transmission member 25 further includes a plunger push rod 255 and a support joint 256, and the anchoring part 1 further includes a side plate 18, wherein two side plates 18 are provided at the end of the push rod 11; one end of the plunger push rod 255 is clamped with the two side plates 18, and the other end is connected to the nut frame 254; one end of the support joint 256 is connected to the balance joint 21 and supports the two side plates 18, and the other end of the support joint 256 is inserted into the plunger push rod 255;

[0094] As in the above structure, the two side plates 18 at the end of the push rod 11 are used to connect the plunger push rod 255, so that the nut frame 254 can drive the push rod 11 and the umbrella rib 14 to move through the plunger push rod 255;

[0095] The support joint 256 is connected to the balance joint 21 and supports the two side plates 18. The support joint 256 is also inserted into the plunger push rod 255. In this way, when the action is performed, the plunger push rod 255 and the side plate 18 reciprocate, and the support joint 256 remains in place, that is, the surface of the support joint 256 cooperates with the inner wall of the balance joint 21, so that the side plate 18 and the plunger push rod 255 can slide, so as to ensure the stability of the action and the structural rigidity.

[0096] The gap between the two side plates 18 is used for connecting the supporting joint 256 and the balancing joint 21 .

[0097] like Figure 2 to Figure 7 As shown, the balancing joint 21 and the first sleeve 22 are both stepped cylindrical structures, wherein the large diameter section of the balancing joint 21 is connected to the anchoring part 1, and the small diameter section of the balancing joint 21 is inserted into the large diameter section of the first sleeve 22; the small diameter section of the first sleeve 22 is inserted into the large diameter section of the second sleeve 23; the side plate 18 and the plunger push rod 255 form a multi-level stepped structure, the small diameter section of the plunger push rod 255 is slidably matched with the small diameter section of the balancing joint 21, and is connected to the nut frame 254; the screw rod 252, the guide frame 253 and the nut frame 254 are located in the large diameter section of the first sleeve 22; the coupling 251 is rotatably arranged in the small diameter section of the first sleeve 22;

[0098] As described above, in the structure of the driving part 2, the balancing joint 21 and the first sleeve 22 are arranged as stepped cylindrical structures and plugged into each other, and the side plate 18 and the plunger push rod 255, the coupling 251 and the guide frame 253 used for transmission are all arranged in a stepped shape, so that the internal space of the balancing joint 21 and the first sleeve 22 can be adapted, thereby ensuring that the overall structure is compact and the outer surface of the anchoring device is flat, which is conducive to the advancement in the drill pipe;

[0099] This structure makes each component highly coaxial, which is beneficial to ensure the movement stability of the coupling 251 and the plunger push rod 255.

[0100] The drill pipe monitoring system of the present invention comprises the above-mentioned optical fiber anchoring device while drilling.

[0101] Specific implementation steps:

[0102] When in use, the wire bin, the driving part 2, the anchoring part 1, the guide rod 4 and the guide cone 3 are connected in sequence, wherein the driving part 2 introduces electric wires to power the motor 24, and is connected to the cable for hoisting, the cable and the optical fiber are synchronously integrated, the cable is tied to the tail end of the driving part 2, and the wire bin releases the optical fiber to the surface of the driving part 2 and the anchoring part 1;

[0103] As the optical fiber anchoring device is hoisted, it enters the drill pipe, and the motor 24 of the driving unit 2 is actuated, driving the push rod 11 to move through the transmission member 25, thereby driving the rib 14 to expand, so that the anchor shoe 142 of the rib 14 abuts against the inner wall of the drill pipe, thereby achieving locking and fixing. In this way, the optical fiber bin is fixed relative to the drill pipe, and has the advantages of stable and reliable application and not easy to be damaged.

[0104] Specifically, a wireless sensor may be arranged inside the drill rod to exchange signals with the optical fiber, or the sensor may be directly integrated at the end of the optical fiber and introduced into the drill rod.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical fiber anchoring device while drilling, characterized in that: The invention comprises an anchoring part (1) and a driving part (2), wherein the anchoring part (1) comprises a push rod (11), an end rod (12), an end ring (13) and a plurality of ribs (14), wherein: The push rod (11) and the end rod (12) are arranged opposite to each other; The end ring (13) is sleeved on the end rod (12); One end of the rib (14) is hinged to the push rod (11), and the other end is hinged to the end ring (13); One end of the driving part (2) is connected to the anchoring part (1), and the other end is equipped with a wire bin. The driving part (2) is used to drive the push rod (11) to move so as to expand or contract the umbrella rib (14).

2. The optical fiber anchoring while drilling device according to claim 1, characterized in that: It also includes a guide cone (3) and a guide rod (4), wherein: One end of the guide cone (3) is connected to the end rod (12), and the other end is a guide end; One end of the guide rod (4) abuts against the guide cone (3), and the other end passes through the end rod (12) and is inserted into the push rod (11).

3. The optical fiber anchoring while drilling device according to claim 2, characterized in that: The anchoring portion (1) further includes a screw (15) and a sleeve (16), and the guide cone (3) and the end rod (12) are connected by screwing. The end ring (13) is fixedly connected to the end rod (12) by means of the screw (15), and the end ring (13) is a stepped cylindrical structure; One end of the sleeve (16) is sleeved on the small-diameter end of the end ring (13), and the other end is sleeved on the guide cone (3); The large diameter end of the end ring (13) corresponds to one end of the umbrella rib (14), and the other end of the umbrella rib (14) corresponds to the stepped surface (101) of the push rod (11).

4. The optical fiber anchoring while drilling device according to claim 1, characterized in that: The anchoring part (1) further comprises a fixing tube (17), one end of the fixing tube (17) being connected to the driving part (2), and the other end of the fixing tube (17) being connected to the end rod (12); The push rod (11) is located in the fixing tube (17), and the fixing tube (17) is provided with an umbrella groove (102) for the umbrella rib (14) to extend out.

5. The optical fiber anchoring while drilling device according to any one of claims 1 to 4, characterized in that: The rib (14) comprises a first connecting rod (141), an anchor shoe (142) and a second connecting rod (143), wherein: One end of the first connecting rod (141) is hinged to the push rod (11); One end of the anchor shoe (142) is hinged to the other end of the first connecting rod (141), and the anchor shoe (142) is provided with oblique teeth (1421); One end of the second connecting rod (143) is hinged to the other end of the anchor shoe (142), and the other end of the second connecting rod (143) is hinged to the end ring (13).

6. The optical fiber anchoring while drilling device according to any one of claims 1 to 4, characterized in that: The driving part (2) comprises a balancing joint (21), a first sleeve (22), a second sleeve (23), a motor (24) and a transmission member (25), wherein: The balancing joint (21), the first sleeve (22) and the second sleeve (23) are connected in sequence and communicate with each other, and the end of the balancing joint (21) away from the first sleeve (22) is connected to the anchoring portion (1); The motor (24) is arranged in the second sleeve (23); The transmission member (25) is arranged in the balancing joint (21) and the first sleeve (22), and the transmission member (25) is connected to the main shaft of the motor (24) and the push rod (11) so as to convert the rotational motion of the main shaft of the motor (24) into the linear motion of the push rod (11).

7. The optical fiber anchoring while drilling device according to claim 6, characterized in that: The transmission member (25) comprises a coupling (251), a screw rod (252), a guide frame (253) and a nut frame (254), wherein: One end of the coupling (251) is connected to the main shaft of the motor (24), and the other end is connected to the screw rod (252); The guide frame (253) is fixedly arranged in the first sleeve (22) and is rotatably connected to the end of the screw rod (252); The nut frame (254) is connected to the screw rod (252) via threads and is slidably matched with the guide frame (253), and the nut frame (254) is connected to the push rod (11).

8. The optical fiber anchoring while drilling device according to claim 7, characterized in that: The transmission member (25) further comprises a plunger push rod (255) and a support joint (256), and the anchoring portion (1) further comprises a side plate (18), wherein: Two side plates (18) are provided at the end of the push rod (11); One end of the plunger push rod (255) is clamped with the two side plates (18), and the other end is connected to the nut frame (254); One end of the support joint (256) is connected to the balance joint (21) and supports the two side plates (18), and the other end of the support joint (256) is inserted into the plunger push rod (255).

9. The optical fiber anchoring while drilling device according to claim 8, characterized in that: The balancing joint (21) and the first sleeve (22) are both stepped cylindrical structures, wherein: The large diameter section of the balancing joint (21) is connected to the anchoring portion (1), and the small diameter section of the balancing joint (21) is inserted into the large diameter section of the first sleeve (22); The small diameter section of the first sleeve (22) is inserted into the large diameter section of the second sleeve (23); The side plate (18) and the plunger push rod (255) form a multi-step ladder structure, the small diameter section of the plunger push rod (255) is slidably matched with the small diameter section of the balancing joint (21), and is connected to the nut frame (254); The screw rod (252), the guide frame (253) and the nut frame (254) are located in the large diameter section of the first sleeve (22); The coupling (251) is rotatably arranged in the small-diameter section of the first sleeve (22).

10. A drill pipe monitoring system, characterized in that: The invention comprises the optical fiber anchoring-while-drilling device as claimed in any one of claims 1 to 9.

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