Drilling tool, inclinometer auxiliary positioning tool and fishing tool

Abstract

The invention discloses a drilling tool, an inclinometer auxiliary positioning tool and a fishing tool. The auxiliary positioning tool for the inclinometer comprises a positioning rod, wherein the positioning rod and the inclinometer are arranged in a drilling tool together; the length of the positioning rod is adjustable; one end of the positioning rod is provided with a first connecting part for connecting the inclinometer, and the other end of the positioning rod is provided with a second connecting part; the second connecting part comprises a positioning claw capable of being opened and closed and a positioning claw adjusting assembly used for adjusting the opening and closing state of the positioning claw; the positioning claw is expanded in the drilling tool to achieve locking when being opened, and the positioning claw is loosened relative to the drilling tool to achieve unlocking when being closed. The auxiliary positioning tool for the inclinometer can adjust the length of the auxiliary positioning tool in a high-precision and large-span range, so that the auxiliary positioning tool for the inclinometer can position and restrain the inclinometers in drilling tools of different models, prevent the inclinometers from being separated from keys, guarantee smooth operation of underground construction operation, enable the inclinometers to have the characteristic of being capable of being salvaged, and improve the positioning accuracy of the inclinometers. And the inclinometer can be recycled when a drill jamming accident occurs, so that the fault loss is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of downhole operations, and in particular to an inclinometer auxiliary positioning tool, a fishing tool applied to the inclinometer auxiliary positioning tool, and a drilling tool including the inclinometer auxiliary positioning tool. Background Art

[0002] In the drilling process, the wireless inclinometer while drilling (inclinometer for short) is a necessary tool for directional operation. Usually, the inclinometer relies on its own weight to sit on the key inside the circulation sleeve of the drill bit. This operation can be called sitting key, which realizes the positioning and installation of the inclinometer at a specific position in the drill bit.

[0003] Since the gap between the inclinometer and the non-magnetic drill collar of the drill tool is small, the inclinometer is prone to debonding when the drill tool is not grouted in time, the drill tool is lowered too fast, or encounters abnormal formation pressure, causing the inclinometer to fail. If the inclinometer fails due to debonding, all the drill tools have to be removed and the inclinometer reinstalled, which will waste a lot of manpower and time. In particular, debonding is more likely to occur when using drill tools equipped with inclinometers in horizontal wells.

[0004] At present, the following three methods are commonly used in China to solve the problem of debonding:

[0005] (I) A mandrel is set in the drilling tool, and the inclinometer is squeezed and fixed to the drilling tool by the mandrel to prevent the inclinometer from axial movement in the drilling tool, thereby preventing the instrument from being debonded. Since the lengths of the long non-magnetic drill rods of different types of drilling tools are different, it is inevitable to use multiple sets of drilling tools in the construction of each well, which requires the processing of mandrels of different lengths to match these drilling tools, which is time-consuming and labor-intensive.

[0006] (ii) A pin hole is opened on the side wall of the short non-magnetic sub of the drilling tool. After the inclinometer is seated in the drilling tool, the inclinometer and the short non-magnetic sub are fixed together by a pin inserted into the pin hole to prevent the inclinometer from moving relative to the short non-magnetic sub, thereby preventing the inclinometer from axially moving in the drilling tool. However, since the mud entering the well easily forms a vortex in the inner hole of the pin of the non-magnetic sub, the non-magnetic sub is worn and a pit is formed, which shortens the service life of the non-magnetic sub.

[0007] (III) Install a check valve at the bottom of the short non-magnetic sub of the drilling tool to prevent mud and other bottom hole fluids from flowing back into the drilling tool and impacting the inclinometer. However, impurities in the mud are easily accumulated at the check valve, resulting in poor switching reliability of the check valve.

[0008] In addition, if a drill bit is stuck, the equipment assembled using the first or second method above will not be able to salvage the inclinometer inside the drill bit. The inclinometer is an expensive instrument, which will cause significant economic losses to underground construction operations. Summary of the invention

[0009] The purpose of the present application is to provide an inclinometer auxiliary positioning tool, which can position and constrain the inclinometer in the drilling tool to prevent the inclinometer from being disengaged, while taking into account the salvageable characteristics of the inclinometer, and realizing the salvage of the inclinometer in the event of a drill stuck accident, so as to recycle the inclinometer and reduce the economic losses of the construction operation. Another purpose of the present application is to provide a salvage tool, which is applied to the aforementioned inclinometer auxiliary positioning tool. Another purpose of the present application is to provide a drilling tool, including the aforementioned inclinometer auxiliary positioning tool.

[0010] To achieve the above-mentioned purpose, the present application provides an auxiliary positioning tool for an inclinometer, including a positioning rod for being installed in a drilling tool together with the inclinometer;

[0011] The length of the positioning rod is adjustable; a first connecting portion for connecting to an inclinometer is provided at one end of the positioning rod, and a second connecting portion is provided at the other end of the positioning rod; the second connecting portion includes an openable and closable positioning claw and a positioning claw adjustment assembly for adjusting the opening and closing state of the positioning claw; when the positioning claw is opened, it expands and supports in the drilling tool to achieve locking, and when the positioning claw is closed, it is loosened relative to the drilling tool to achieve unlocking.

[0012] In some embodiments, the positioning claw adjustment assembly includes:

[0013] The expansion member is arranged in the positioning claw and is movably installed along the axial direction of the positioning claw, and is used to expand and support the positioning claw;

[0014] The expansion and support positioning piece is used to position the expansion and support piece at the inner periphery of the positioning claw; the expansion and support positioning piece is movable or deformable.

[0015] In some embodiments, the positioning claw adjustment assembly also includes an outer cylinder; the expansion positioning member includes an elastic member; the positioning claw includes a plurality of pawls, all of which are arranged on the circumferential side of the outer cylinder; the expansion member and the elastic member are both arranged in the outer cylinder, and are distributed sequentially from the outside to the inside along the axial direction of the outer cylinder; the elastic member expands and contracts along the axial direction of the outer cylinder, and one end of the elastic member abuts against the axial end of the expansion member.

[0016] In some embodiments, the expansion member includes an inner tube; a third connecting portion for connecting a salvage tool is provided in the outer tube; the inner tube, the elastic member and the third connecting portion are distributed in sequence from the outside to the inside along the axial direction of the outer tube; the elastic member is hollow, and the salvage tool can be inserted into the positioning claw, the inner tube, and the elastic member in sequence to squeeze the elastic member and connect the third connecting portion.

[0017] In some embodiments, a first step, a second step and a third step are provided in the outer tube; the first step, the second step and the third step are gradually reduced from outside to inside along the axial direction of the outer tube; the outer diameter of the inner tube is smaller than the inner diameter of the second step and larger than the inner diameter of the third step; the other end of the elastomer is fixed to the third step.

[0018] In some embodiments, the third connection portion is specifically a first reverse thread provided on the inner wall of the third step.

[0019] In some embodiments, the positioning rod includes a top rod, a length adjuster and an extension rod; the top rod, the length adjuster and the extension rod are distributed in sequence along the axial direction of the positioning rod and are detachably connected in pairs; the second connecting part is provided on the top rod, and the first connecting part is provided on the extension rod; the top rod and the extension rod are both fixed rods, and the length adjuster is a telescopic rod.

[0020] In some embodiments, the length adjuster includes an adjusting outer cylinder, an adjusting rod and a connecting pin; the adjusting outer cylinder and the adjusting rod are sleeved on each other and movably connected along the axial direction; a pin hole is provided on the circumferential side of the adjusting outer cylinder, and an axially extending positioning groove is provided on the circumferential side of the adjusting rod, and the connecting pin passes through the pin hole and is embedded in the compression positioning groove to achieve relative fixation of the adjusting outer cylinder and the adjusting rod.

[0021] In some embodiments, a first connecting thread is provided inside the adjusting outer cylinder; the adjusting rod includes a connecting rod and a connecting sleeve, a second connecting thread is provided outside the connecting rod for connecting the first connecting thread, and the connecting sleeve is provided with a through hole penetrating in the radial direction.

[0022] The present application also provides a salvage tool for salvaging the above-mentioned inclinometer auxiliary positioning tool, comprising a salvage rod; one end of the salvage rod is provided with a salvage head and an open lock ring, and the other end of the salvage rod is provided with a cable connector; the peripheral side of the open lock ring is provided with an axially through opening, and the peripheral side surface of the open lock ring is provided with a second reverse thread; the radial size of the uncompressed open lock ring, the inner diameter of the third step, and the radial size of the salvage head are successively reduced;

[0023] When the fishing head and the split lock ring are inserted into the positioning rod in sequence, the split lock ring is compressed and squeezed into the third step so that the second reverse thread is threadably connected with the first reverse thread.

[0024] In some embodiments, the salvage rod includes a rod I and a rod II; adjacent axial ends of the rod I and the rod II are sleeved with each other and fixedly connected by shear nails; one end of the rod I is provided with a salvage head and an open locking ring, and the other end of the rod I is provided with a plug-in portion for a universal salvage tube to be plugged and fixed.

[0025] The present application also provides a drilling tool, including a drilling tool, an inclinometer and the above-mentioned inclinometer auxiliary positioning tool; the drilling tool includes a first connecting section, a second connecting section and a tail drill pipe; the first connecting section, the second connecting section and the tail drill pipe are all sleeve-shaped, and the first connecting section and the tail drill pipe are respectively installed at both ends of the second connecting section; the first connecting section is provided with a drill bit; the second connecting section is provided with a limit platform for the positioning claw to expand and position; the inclinometer and the inclinometer auxiliary positioning tool are inserted into the second connecting section together.

[0026] With respect to the above-mentioned background technology, the inclinometer auxiliary positioning tool provided in the present application includes a positioning rod for being installed in the drilling tool together with the inclinometer; the length of the positioning rod is adjustable; one end of the positioning rod is provided with a first connecting part for connecting to the inclinometer, and the other end of the positioning rod is provided with a second connecting part; the second connecting part includes an openable and closable positioning claw and a positioning claw adjustment assembly for adjusting the opening and closing state of the positioning claw; wherein, when the positioning claw is opened, it is expanded in the drilling tool to achieve locking, and when the positioning claw is closed, it is loosened relative to the drilling tool to achieve unlocking.

[0027] The inclinometer auxiliary positioning tool provided by the present application can adjust its own length with high precision and over a large span range, so it can position and constrain the inclinometers in different types of drilling tools to prevent the inclinometers from being debonded in the drilling tools. In other words, the inclinometer can be stably and reliably positioned and installed in a specific position in the drilling tool to ensure the operating effect of the inclinometer. The inclinometer auxiliary positioning tool provided by the present application also has a salvageable feature, so that the inclinometer connected thereto also has a salvageable feature. When a drill stuck accident occurs, the operator can use the inclinometer auxiliary positioning tool to easily and quickly remove and salvage the inclinometer from the downhole drilling tool, thereby realizing the recycling of the inclinometer and effectively reducing the loss caused by the accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application 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 embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 It is a schematic diagram of assembling the inclinometer auxiliary positioning tool and the universal canister provided in the embodiment of the present application;

[0030] Figure 2 A schematic diagram of the structure of the ejector provided in the embodiment of the present application;

[0031] Figure 3 A schematic diagram of the structure of the adjustment rod provided in the embodiment of the present application;

[0032] Figure 4 for Figure 3 Section view along AA direction;

[0033] Figure 5 A schematic diagram of the structure of the adjusting outer cylinder provided in an embodiment of the present application;

[0034] Figure 6 A schematic diagram of the structure of the salvage tool provided in the embodiment of the present application;

[0035] Figure 7 A schematic diagram of the structure of the drilling tool provided for this application;

[0036] Figure 8 A schematic diagram of the assembly of the salvage tool and the inclinometer auxiliary positioning tool provided in the embodiment of the present application;

[0037] Fig. 9 This is a schematic assembly diagram of the universal fishing tube, some fishing tools and inclinometer auxiliary positioning tooling provided in an embodiment of the present application.

[0038] in,

[0039] 1-inclinometer auxiliary positioning tooling, 100-rod, 110-length adjuster, 120-extension rod, 11-positioning claw, 12-outer cylinder, 121-first step, 122-second step, 123-third step, 13-inner cylinder, 14-elastic member, 15-first reverse thread, 16-adjusting outer cylinder, 161-pin hole, 162-first connecting thread, 17-adjusting rod, 171-positioning groove, 172-connecting rod, 173-connecting sleeve, 174-second connecting thread, 175-through hole, 18-connecting pin, 19-circulation hole;

[0040] 2-drilling tool, 21-first connecting joint, 22-second connecting joint, 23-tail drill rod, 24-drill bit, 25-limiting platform;

[0041] 3-salvage tool, 31-salvage rod, 311-rod I, 312-rod II, 32-salvage head, 33-open lock ring, 34-second reverse thread, 35-shear nail hole, 36-insertion part, 37-convex part, 38-lock ring groove;

[0042] 4-Universal canister;

[0043] 5- Inclinometer;

[0044] 6- Cable;

[0045] 7-Sucker rod. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] Please refer to Figures 1 to 9 , Figure 1 It is a schematic diagram of assembling the inclinometer auxiliary positioning tool and the universal canister provided in the embodiment of the present application; Figure 2 A schematic diagram of the structure of the ejector provided in the embodiment of the present application; Figure 3 A schematic diagram of the structure of the adjustment rod provided in the embodiment of the present application;

[0049] Figure 4 for Figure 3 Section view along AA direction; Figure 5 A schematic diagram of the structure of the adjusting outer cylinder provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of the salvage tool provided in the embodiment of the present application; Figure 7 A schematic diagram of the structure of the drilling tool provided for this application; Figure 8 A schematic diagram of the assembly of the salvage tool and the inclinometer auxiliary positioning tool provided in the embodiment of the present application; Fig. 9 This is a schematic assembly diagram of the universal fishing tube, some fishing tools and inclinometer auxiliary positioning tooling provided in an embodiment of the present application.

[0050] Please refer to Figure 1 , Figure 2 and Figure 7 The present application provides an inclinometer auxiliary positioning tool 1, comprising a positioning rod and a first connecting portion and a second connecting portion respectively arranged at two ends of the positioning rod.

[0051] The positioning rod is used to be installed together with the inclinometer 5 in the drilling tool 2, and its length is adjustable, so that its own length can be adjusted according to the size relationship between the drilling tool 2 and the inclinometer 5, so that the inclinometer 5 is positioned and installed at a specified position inside the drilling tool 2. In addition, in combination with actual working conditions, an auxiliary connecting piece, such as a universal canister 4, can be added between the positioning rod and the inclinometer 5, and the positioning rod and the inclinometer 5 are fixedly connected together by the universal canister 4.

[0052] The first connection part and the second connection part are respectively arranged at the two ends of the positioning rod. The first connection part is used to connect the inclinometer 5, that is, the positioning rod can be connected to the inclinometer 5 through the first connection part, and the positioning rod and the inclinometer 5 are connected as one. The second connection part includes a positioning claw 11 and a positioning claw adjustment assembly. The positioning claw 11 can perform opening and closing movements, that is, the positioning claw 11 includes at least two states of opening and closing; the positioning claw adjustment assembly is connected to the positioning claw 11 and is used to adjust the opening and closing state of the positioning claw 11.

[0053] In the inclinometer auxiliary positioning tool 1, the positioning claws 11 can be expanded and supported in the drilling tool 2 when they are opened, so that the inclinometer auxiliary positioning tool 1 and the drilling tool 2 are locked. At this time, the positioning rod is fixed in the drilling tool 2, so that the inclinometer 5 connected to the positioning rod is also fixed in the drilling tool 2. On the contrary, when the positioning claws 11 are closed, the drilling tool 2 is released, so that the inclinometer auxiliary positioning tool 1 and its positioning claws 11 are loosened in the drilling tool 2, so that the inclinometer auxiliary positioning tool 1 and the drilling tool 2 are unlocked. At this time, the positioning rod can move in the drilling tool 2 and no longer has a positioning effect on the inclinometer 5 and the drilling tool 2.

[0054] In summary, it can be seen that the inclinometer auxiliary positioning tool 1 provided in the present application can not only exert an auxiliary positioning effect on the inclinometer 5 and the drill tool 2 in normal construction, so that the inclinometer 5 can be stably and reliably positioned and installed at a specific position in the drill tool 2, thereby ensuring the operating effect of the inclinometer 5; the inclinometer auxiliary positioning tool 1 provided in the present application can also easily and quickly remove the inclinometer 5 from the drill tool 2 during abnormal construction such as the drill tool 2 being stuck in the well, thereby realizing the recycling of the inclinometer 5, leaving only the drill tool 2 in the well, improving the product recovery rate, and reducing the failure cost.

[0055] Typically, when removing the inclinometer 5 from the drill tool 2 using the inclinometer auxiliary positioning tool 1 provided in the present application, the inclinometer auxiliary positioning tool 1 and the drill tool 2 can be unlocked first. At this time, the inclinometer auxiliary positioning tool 1 and the inclinometer 5 remain connected. Next, a suitable tool is selected and inserted into the well and into the drill tool 2. The tool is used to connect the inclinometer auxiliary positioning tool 1, and then the tool is pulled outward to remove the tool, the inclinometer auxiliary positioning tool 1 and the drill tool 2 from the drill tool 2 located underground.

[0056] The inclinometer auxiliary positioning tool 1 provided in the present application is further described below in conjunction with the accompanying drawings and implementation modes.

[0057] Still available for reference Figure 1 , Figure 2 and Figure 7 In some embodiments, the positioning claw adjustment assembly of the inclinometer auxiliary positioning tool 1 may include an expansion member and an expansion positioning member; the aforementioned expansion member is arranged on the positioning claw 11, and is movably installed along the axial direction of the positioning claw 11, and is used to expand the positioning claw 11; the aforementioned expansion positioning member is movable or deformable, and is used to position the expansion member on the inner periphery of the positioning claw 11.

[0058] In the above embodiment, the expansion and support positioning member is movable or deformable. Taking the movable expansion and support positioning member as an example, assuming that the expansion and support positioning member can be positioned at the inner periphery of the positioning claw 11 before the expansion and support positioning member moves, then the expansion and support member is inserted into the positioning claw 11 and expands the positioning claw 11 outward, so that the positioning claw 11 is opened, and the inclinometer auxiliary positioning tool 1 and the drilling tool 2 are locked by the positioning claw 11; after the expansion and support positioning member moves, the expansion and support positioning member removes the positioning effect on the expansion and support member, and the expansion and support member moves along the axial direction of the positioning claw 11 at this time. Once the expansion and support member is separated from the positioning claw 11, the expansion and support member no longer expands the positioning claw 11 outward, so that the positioning claw 11 is naturally closed, and the inclinometer auxiliary positioning tool 1 and the drilling tool 2 are unlocked by the positioning claw 11.

[0059] Similarly, if the expansion and support positioning member is a deformable expansion and support positioning member, the relative position relationship between the expansion and support positioning member and the positioning claw 11 can be changed before and after deformation, so that the positioning claw 11 can be used to lock and unlock the inclinometer auxiliary positioning tool 1 and the drilling tool 2.

[0060] As can be seen from the above, when the operator uses the inclinometer to assist in positioning the tool 1 , the operator can adjust the expansion and support positioning member according to the movable property or deformable property of the expansion and support positioning member, thereby adjusting the locking and unlocking states of the positioning claw 11 .

[0061] On the basis of the above embodiment, the positioning claw adjustment assembly also includes an outer cylinder 12. At the same time, the expansion positioning member includes an elastic member 14, and the positioning claw 11 includes a plurality of pawls; all the pawls are arranged on the peripheral side of the outer cylinder 12, and the expansion member and the elastic member 14 are both arranged in the outer cylinder 12, and the expansion member and the elastic member 14 are distributed in sequence from the outside to the inside along the axial direction of the outer cylinder 12; wherein the elastic member 14 expands and contracts along the axial direction of the outer cylinder 12, and one end of the elastic member 14 is against the axial end of the expansion member.

[0062] In the above embodiment, since the expansion member and the elastic member 14 are sequentially distributed from outside to inside along the axial direction of the outer cylinder 12, when the adjacent axial ends of the elastic member 14 and the expansion member abut against each other, if no external force acts on the elastic member 14, the elastic member 14 can push the expansion member outward along the axial direction of the outer cylinder 12, and if an external force presses the elastic member 14 into the outer cylinder 12, the elastic member 14 is compressed and deformed, causing the expansion member to lose the support of the elastic member 14 and move into the outer cylinder 12. It can be seen that the expansion positioning member includes a deformable elastic member 14, and applying pressure from the outside of the outer cylinder 12 to the elastic member 14 in the outer cylinder 12 can deform the elastic member 14, and the deformation of the elastic member 14 causes the expansion member to move along the axial direction of the outer cylinder 12, thereby changing the relative position relationship between the expansion member and the positioning claw 11, and realizing the use of the positioning claw 11 to lock and unlock the inclinometer auxiliary positioning tool 1 and the drilling tool 2.

[0063] Generally, in the above embodiments, when the elastic member 14 is not compressed and deformed, the elastic member 14 pushes and supports the expansion member toward the outside of the outer tube 12, so that the expansion member is inserted into the inner periphery of the positioning claw 11, and the positioning claw 11 is expanded outward by the expansion member. On the contrary, when the elastic member 14 is compressed and deformed, the expansion member moves toward the inside of the outer tube 12 with the elastic member 14, causing the expansion member to separate from the inner periphery of the positioning claw 11, and after losing the support of the expansion member, the positioning claw 11 naturally closes.

[0064] In addition, the expansion member used in the above embodiment may include an inner tube 13, and at the same time, a third connection part for connecting the salvage tool 3 is provided in the outer tube 12. The inner tube 13, the elastic member 14 and the third connection part can be distributed in sequence from the outside to the inside along the axial direction of the outer tube 12, wherein the elastic member 14 is hollow, or in other words, the elastic member 14 is cylindrical, so that the salvage tool 3 can be inserted into the positioning claw 11, the inner tube 13, and the elastic member 14 in sequence to squeeze the elastic member 14 and connect the third connection part. Usually, the elastic member 14 is specifically configured as a spring, the upper end of the spring can be welded and fixed to the inner tube 13, and the lower end of the spring can be fixed in the outer tube 12 by a pin.

[0065] According to the above records, when the drilling tool 2 is stuck in the well, the operator can use the tool and the inclinometer auxiliary positioning tool 1 to easily and quickly remove the inclinometer 5 from the drilling tool 2 in the well, so as to realize the recycling of the inclinometer 5. Figure 6 and Figure 8 , the salvage tool 3 is a specific implementation of the aforementioned tool.

[0066] Please refer to Figure 1 , Figure 2 , Figure 6 and Figure 8 When the operator uses the salvage tool 3 and the inclinometer auxiliary positioning tool 1 to recover the inclinometer 5 from the drilling tool 2 underground, the operator can insert the salvage tool 3 into the underground and into the drilling tool 2. When the salvage tool 3 continuously extends from one axial end of the drilling tool 2 to the other axial end, a part of the structure of the salvage tool 3 can squeeze the elastic member 14, and a part of the structure of the salvage tool 3 can pass through the elastic member 14 and connect to the third connecting portion.

[0067] For example, the salvage tool 3 includes a salvage head and a salvage rod 31, the radial dimension of the salvage rod 31 is larger than the radial dimension of the salvage head, the radial dimension of the salvage head is smaller than the inner diameter of the elastic member 14, and the radial dimension of the salvage rod 31 is larger than the inner diameter of the elastic member 14. When the salvage head and the salvage rod 31 are inserted into the positioning claw 11, the inner tube 13, and the elastic member 14 in sequence, the salvage head can pass through the positioning claw 11, the inner tube 13, and the elastic member 14 in sequence, and finally connected to the third connection part, while the salvage rod 31 cannot be inserted into the elastic member 14, resulting in the salvage rod 31 gradually squeezing the elastic member 14 as the salvage head continues to penetrate into the drilling tool 2, causing the elastic member 14 to be compressed and deformed.

[0068] It can be seen that based on the shape structure and connection relationship between the salvage tool 3 and the inclinometer auxiliary positioning tool 1, the inclinometer 5 can be recovered from the drilling tool 2 underground by using the salvage tool 3 and the inclinometer auxiliary positioning tool 1. The operator only needs to insert the salvage tool 3 into the drilling tool 2 to achieve the two purposes of unlocking the inclinometer auxiliary positioning tool 1 and the drilling tool 2 by the positioning claw 11 and connecting the inclinometer auxiliary positioning tool 1 and the inclinometer 5, thereby realizing the easy and fast recovery of the inclinometer 5 from the drilling tool 2 underground.

[0069] For reference Figure 1 and Figure 2 In some embodiments, a first step 121, a second step 122 and a third step 123 are provided in the outer cylinder 12; the first step 121, the second step 122 and the third step 123 are gradually reduced from the outside to the inside along the axial direction of the outer cylinder 12, that is, the inner diameters of the first step 121, the second step 122 and the third step 123 are gradually reduced; the outer diameter of the inner cylinder 13 is smaller than the inner diameter of the second step 122, and the outer diameter of the inner cylinder 13 is larger than the inner diameter of the third step 123, so that the inner cylinder 13 can only move between the axial end of the outer cylinder 12, the first step 121 and the second step 122, and cannot enter the third step 123 of the outer cylinder 12, and naturally cannot reach the other axial end of the outer cylinder 12. Usually, when the inner cylinder 13 is between the axial end of the outer cylinder 12 and the first step 121, the inner cylinder 13 is inserted into the inner periphery of the positioning claw 11, and the positioning claw 11 can be expanded outward; and when the inner cylinder 13 is between the first step 121 and the second step 122, the inner cylinder 13 is separated from the positioning claw 11, and the positioning claw 11 is naturally closed. The outer edge of the axial end of the inner cylinder 13 can be provided with a rounded corner; the outer cylinder 12 can be provided with a circulation hole 19 that penetrates in the radial direction and extends in the axial direction.

[0070] For reference Figure 2 , Figure 6 and Figure 8 In some embodiments, the outer tube 12 is provided with a third connection portion, which can be specifically a first reverse thread 15 provided on the inner wall of the third step 123, and the first reverse thread 15 is used to connect the salvage tool 3. Of course, the salvage tool 3 is often provided with a thread structure that matches the first reverse thread 15, and details can be found later.

[0071] For reference Figure 1 and Figure 7In the inclinometer auxiliary positioning tool 1 provided in the present application, the positioning rod may include a mandrel 100, a length adjuster 110 and an extension rod 120 connected in sequence; wherein the mandrel 100, the length adjuster 110 and the extension rod 120 are sequentially distributed along the axial direction of the positioning rod, and any two adjacent ones of the mandrel 100, the length adjuster 110 and the extension rod 120 can be detachably connected through structures such as male buckles and female buckles. For the aforementioned positioning rod, the second connecting portion can be provided on the mandrel 100, the first connecting portion can be provided on the extension rod 120, the extension rod 120 is connected to the inclinometer 5 through the first connecting portion, and the mandrel 100 can lock and unlock the inclinometer auxiliary positioning tool 1 and the drilling tool 2 through the second connecting portion.

[0072] For the above-mentioned positioning rod, the top rod 100 and the extension rod 120 can both be set as fixed rods, and the length adjuster 110 can be set as a telescopic rod. It can be seen that the positioning rod can achieve length adjustment based on the telescopic characteristics of the length adjuster 110.

[0073] In the above embodiment, the length adjustment of the positioning rod is based on the telescopic characteristics of the length adjuster 110. Specifically, when the length of the positioning rod needs to be increased, the operator can adjust the length adjuster 110 to extend it, thereby increasing the total length of the top rod 100, the length adjuster 110 and the extension rod 120. Conversely, when the length of the positioning rod needs to be shortened, the operator can adjust the length adjuster 110 to shorten it, thereby reducing the total length of the top rod 100, the length adjuster 110 and the extension rod 120.

[0074] The top rod 100, the length adjuster 110 and the extension rod 120 are assembled to form a positioning rod. Therefore, for any one of the top rod 100, the length adjuster 110 and the extension rod 120, the difficulty of processing, using, storing and transporting is reduced. For the entire positioning rod, any one of the top rod 100, the length adjuster 110 and the extension rod 120 can be repaired and replaced individually, thereby improving the utilization rate of the remaining structures.

[0075] In addition, please refer to Figure 1 , Figures 3 to 5In the inclinometer auxiliary positioning tool 1 provided in the present application, the length adjuster 110 may include an adjusting outer cylinder 16, an adjusting rod 17 and a connecting pin 18; in this embodiment, the adjusting outer cylinder 16 and the adjusting rod 17 are mutually sleeved, and the adjusting outer cylinder 16 and the adjusting rod 17 are movably connected along the axial direction, and the axial direction here can refer to the axial direction of the outer cylinder 12 or the adjusting rod 17, and can also refer to the axial direction of the entire positioning rod; in this embodiment, the circumference of the adjusting outer cylinder 16 is provided with a pin hole 161, and the circumference of the adjusting rod 17 is provided with a positioning groove 171, and the positioning groove 171 extends along the axial direction of the adjusting rod 17. Usually, the circumference of the adjusting rod 17 is provided with two symmetrically distributed positioning grooves 171; the upper end of the adjusting outer cylinder 16 can be provided with a female buckle for buckling with the male buckle at the lower end of the push rod 100.

[0076] When installing the adjusting outer cylinder 16 and the adjusting rod 17, the connecting pin 18 can be inserted from the pin hole 161 and embedded in the pressing positioning groove 171 to achieve relative fixation of the adjusting outer cylinder 16 and the adjusting rod 17. Since the positioning groove 171 is provided on the peripheral side of the adjusting rod 17 and extends along the axial direction of the adjusting rod 17, when the length of the length adjuster 110 needs to be increased or decreased, the operator can adjust the position of the pin in the positioning groove 171 to move the pin between the two ends of the positioning groove 171.

[0077] Still available for reference Figure 1 , Figures 3 to 5 On the basis of the above embodiment, the adjusting outer cylinder 16 is provided with a first connecting thread 162; the adjusting rod 17 includes a connecting rod 172 and a connecting sleeve 173, the connecting rod 172 is provided with a second connecting thread 174, the tooth profile of the second connecting thread 174 can be set to a sawtooth type or a ladder type, and the connecting sleeve 173 is provided with a through hole 175 that penetrates in the radial direction. The first connecting thread 162 of the adjusting outer cylinder 16 can be threadedly connected with the second connecting thread 174 of the connecting rod 172; the connecting sleeve 173 is provided with a through hole 175, and the through hole 175 can be used to insert a tool such as a screwdriver, so as to facilitate the rotation of the adjusting rod 17 with the help of the tool, and can also be inserted with a pin to connect the length adjuster 110 and the outer cylinder 12 after the length adjustment of the length adjuster 110 is completed.

[0078] Please refer to Figure 1 , Figure 2 , Figures 6 to 8The present application also provides a salvage tool 3, which is applied to the above-mentioned inclinometer auxiliary positioning tool 1, and includes a salvage rod 31; in the salvage tool 3, one end of the salvage rod 31 is provided with a salvage head and an open lock ring, and the other end of the salvage rod 31 is provided with a cable connector; the circumferential side of the aforementioned open lock ring is provided with an axially through opening, and this opening makes the open lock ring elastic, and at the same time, the circumferential side surface of the aforementioned open lock ring is provided with a second reverse thread 34, and the second reverse thread 34 is used to be threadedly connected with the first reverse thread 15 to achieve a fixed connection between the salvage tool 3 and the inclinometer auxiliary positioning tool 1. Among them, the tooth profile inclination angle of the first reverse thread 15 is downward, and the tooth profile inclination angle of the second reverse thread 34 is upward, and the first reverse thread 15 and the second reverse thread 34 can be firmly engaged.

[0079] Of course, the above-mentioned salvage tool 3 and the inclinometer auxiliary positioning tool 1 need to meet a certain size relationship in order to realize the fixed connection between the salvage tool 3 and the inclinometer auxiliary positioning tool 1 by using the first reverse thread 15 and the second reverse thread 34 when the salvage tool 3 is inserted into the drilling tool 2. The above-mentioned size relationship means that the radial size of the uncompressed open lock ring 33, the inner diameter of the third step 123 and the radial size of the salvage head are successively reduced. Usually, the lower part of the above-mentioned salvage head is spherical or conical.

[0080] When the fishing head and the split lock ring 33 are inserted into the positioning rod in sequence, the fishing head can be easily inserted into the third step 123 to guide the split lock ring 33 that has not been compressed and deformed to enter the third step 123; since the radial dimension of the split lock ring 33 that has not been compressed and deformed is larger than, the split lock ring 33 is compressed and deformed when it is continuously inserted into the third step 123. In other words, the split lock ring 33 is compressed and deformed and squeezed into the third step 123, which enables the first reverse thread 15 in the third step 123 and the second reverse thread 34 on the peripheral side of the split lock ring 33 to mesh with each other. When the first reverse thread 15 and the second reverse thread 34 mesh with each other, since the split lock ring 33 has a tendency to open toward the peripheral side, the first reverse thread 15 and the second reverse thread 34 can be firmly and reliably connected to each other.

[0081] In addition, in some embodiments, the fishing rod 31 further comprises a rod I311 and a rod II312 which are assembled and connected. The adjacent axial ends of the rod I311 and the rod II312 are sleeved with each other, and the adjacent axial ends of the rod I311 and the rod II312 are fixedly connected by shear nails; wherein, one end of the rod I311 is provided with a fishing head and an open locking ring 33, and the other end of the rod I311 is provided with a plug-in portion 36 for the universal fishing tube 4 to be plugged and fixed.

[0082] Typically, more than four shear nail holes 35 may be provided at the adjacent axial ends of rod I311 and rod II312, and the operator may insert a plurality of shear nails into all the shear nail holes 35 according to the actual working conditions, thereby realizing the tonnage control of the release.

[0083] In the process of salvaging the inclinometer auxiliary positioning tool 1 and the inclinometer 5, the use of shear nails to achieve the tonnage control of the release can be understood as follows: when the salvage tool 3 and its salvage rod 31 are used to remove the inclinometer auxiliary positioning tool 1 and the inclinometer 5 from the well, if the load of the salvage tool 3 is too large, the shear nails can be broken in time, so that the rod I311 and the rod II312 of the salvage rod 31 are separated from each other, avoiding damage to the inclinometer auxiliary positioning tool 1 and the inclinometer 5 due to forced salvage. Of course, if the load of the salvage tool 3 does not exceed the limited range of the shear nails, the rod I311 and the rod II312 of the salvage rod 31 are connected to each other under the action of the shear nails, and the salvage tool 3 can be connected to the inclinometer auxiliary positioning tool 1 and pull the inclinometer auxiliary positioning tool 1 out of the well, so as to remove the inclinometer auxiliary positioning tool 1 and the inclinometer 5 from the well and the drilling tool 2.

[0084] If the shear nail breaks due to excessive load on the salvage tool 3, the rod I311 and the rod II312 of the salvage rod 31 are separated from each other, and the rod I311, the inclinometer auxiliary positioning tool 1, and the inclinometer 5 remain in the drilling tool 2. The rod II312 and other parts of the salvage tool 3 can be taken out from the well, and then the tool can be replaced and the new tool connecting rod 172I can be used to take out the rod I311, the inclinometer auxiliary positioning tool 1, and the inclinometer 5 together.

[0085] Usually, the salvage tool 3 is used in conjunction with the cable 6. The load limit of the salvage tool 3 depends on the load capacity of the cable 6. Therefore, in order to prevent the cable 6 from breaking due to excessive load on the salvage tool 3, the shear nails are designed to break before the cable 6. When the cable 6 and the salvage tool 3 cannot be removed from the well by the inclinometer auxiliary positioning tool 1 and the inclinometer 5, the rigid rods can be replaced to remove the inclinometer auxiliary positioning tool 1 and the inclinometer 5. That is, the rigid rods can be inserted into the drilling tool 2 downhole, and the rigid rods are used to connect the rods I311, and then the aforementioned rigid rods, the rods I311, the inclinometer auxiliary positioning tool 1 and the inclinometer 5 are pulled out of the well. Among them, the aforementioned rigid rods can be Fig. 9 A universal canister 4 and a sucker rod 7 are shown.

[0086] In addition, the above-mentioned rod I311 may also specifically include a sucker rod salvage head and a salvage head 32, which are connected to each other through a connecting port. For example, the sucker rod salvage head is provided with a female buckle, and the salvage head 32 is provided with a male buckle. The female buckle of the sucker rod salvage head is provided with a convex portion 37 protruding outward, and the salvage head 32 is provided with a locking ring groove 38. When the sucker rod salvage head and the salvage head 32 are installed, the female buckle of the sucker rod salvage head and the male buckle of the salvage head 32 are buckled with each other, and the convex portion 37 is embedded in the locking ring groove 38.

[0087] On the basis of the various embodiments provided above, the present application further provides a drilling tool, including a drilling tool 2 and, of course, an inclinometer auxiliary positioning tool 1 .

[0088] In the drilling tool provided in the present application, the drilling tool 2 may include a first connecting section 21, a second connecting section 22 and a tail drill rod 23 connected in sequence; the first connecting section 21, the second connecting section 22 and the tail drill rod 23 are all sleeve-shaped, and the first connecting section 21 and the tail drill rod 23 are respectively installed at both ends of the second connecting section 22; the aforementioned first connecting section 21 is provided with a drill bit 24, and the aforementioned second connecting section 22 is provided with a limit platform 25 for the positioning claw 11 to expand and position.

[0089] For the above-mentioned drilling tool, the inclinometer 5 and the inclinometer auxiliary positioning tool 1 are inserted into the second connecting joint 22 together, and the inclinometer auxiliary positioning tool 1 and the tail drill pipe 23 jointly constrain the axial position of the inclinometer 5 in the drilling tool 2.

[0090] In summary, the inclinometer auxiliary positioning tool 1 provided in the present application can position and constrain the inclinometer 5 in the drilling tool 2 to prevent the inclinometer 5 from being debonded in the drilling tool 2. Of course, the drilling tool provided in the present application has the function of preventing the inclinometer 5 from being debonded, which can improve the positioning accuracy and installation strength of the inclinometer 5 in the drilling tool 2.

[0091] When using the inclinometer auxiliary positioning tool 1 to position the inclinometer 5 in the drilling tool 2, first, the inclinometer 5 is placed in the drilling tool 2 and the inclinometer 5 is seated. After this operation, the required compensation length of the inclinometer 5 in the drilling tool 2 needs to be obtained by the length of the seating tool, and this compensation length will be provided by the inclinometer auxiliary positioning tool 1; then, the inclinometer auxiliary positioning tool 1 is adjusted according to the compensation length, specifically, the length of the length adjuster 110 of the inclinometer auxiliary positioning tool 1 is adjusted so that the total length of the inclinometer auxiliary positioning tool 1 meets the compensation length; then, the adjusted inclinometer auxiliary positioning tool 1 and the inclinometer 5 are installed in the drilling tool 2 together, and the inclinometer auxiliary positioning tool 1 is used to support the inclinometer 5 to prevent the inclinometer 5 from leaving the target installation position of the inclinometer 5 and to prevent the inclinometer 5 from moving randomly in the drilling tool 2.

[0092] When a drill bit is stuck, the operator needs to salvage the inclinometer 5. At this time, the inclinometer auxiliary positioning tool 1 makes the inclinometer 5 have a good salvageable characteristic. That is, the operator can salvage the inclinometer 5 by salvaging the inclinometer auxiliary positioning tool 1, thereby salvaging and recovering the expensive inclinometer 5 from the downhole drilling tool 2, leaving only the drilling tool 2 abandoned in the well.

[0093] When the inclinometer 5 is salvaged through the salvage inclinometer auxiliary positioning tool 1, the salvage tool 3 can be connected with the cable 6, and the salvage tool 3 can be lowered into the downhole drilling tool 2 through the cable 6, so that the salvage tool 3 unlocks the salvage inclinometer auxiliary positioning tool 1 and connects the salvage inclinometer auxiliary positioning tool 1, and then the salvage tool 3, the salvage inclinometer auxiliary positioning tool 1 and the inclinometer 5 are pulled out of the well through the cable 6 to realize the salvage of the inclinometer auxiliary positioning tool 1 and the inclinometer 5. If the resistance during the salvage process may exceed the bearing capacity of the cable 6, the shear nails of the salvage tool 3 are sheared to complete the release, at which time the cable 6 and part of the salvage tool 3 can be salvaged, and then the universal salvage tube 4 and the sucker rod 7 are inserted into the downhole drilling tool 2, and the remaining salvage tools 3 left in the downhole drilling tool 2 are connected by the universal salvage tube 4, and then the universal salvage tube 4 is pulled out to realize the salvage of the universal salvage tube 4, part of the salvage tool 3, the salvage inclinometer auxiliary positioning tool 1 and the inclinometer 5. After the salvaged inclinometer auxiliary positioning tool 1 and the inclinometer 5 are salvaged, various components can be dismantled using tools to recover the salvaged inclinometer auxiliary positioning tool 1 and the inclinometer 5 .

[0094] The inclinometer auxiliary positioning tool 1 provided by the present application has good adjustability while effectively preventing the key from falling off, and can adjust its own length with high precision and a large span range, and is suitable for positioning and installing the inclinometer 5 on different types of drilling tools 2, avoiding the need to process push rod tools of different lengths for different types of drilling tools 2 to position and constrain the inclinometer 5, thereby effectively saving costs. The inclinometer auxiliary positioning tool 1 provided by the present application makes the inclinometer 5 salvageable, and can salvage the inclinometer 5 when a drill stuck accident occurs, effectively reducing accident losses.

[0095] The above is a detailed introduction to the drilling tools, inclinometer auxiliary positioning tooling and fishing tools provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. An inclinometer auxiliary positioning tool (1), characterized in that: It comprises a positioning rod used to be installed together with the inclinometer (5) in the drilling tool (2); The length of the positioning rod is adjustable; a first connection portion for connecting to an inclinometer (5) is provided at one end of the positioning rod, and a second connection portion is provided at the other end of the positioning rod; the second connection portion comprises an openable and closable positioning claw (11) and a positioning claw adjustment assembly for adjusting the opening and closing state of the positioning claw (11); when the positioning claw (11) is opened, it is extended and supported in the drilling tool (2) to achieve locking, and when the positioning claw (11) is closed, it is loosened relative to the drilling tool (2) to achieve unlocking.

2. The inclinometer auxiliary positioning tool (1) according to claim 1, characterized in that: The positioning claw adjustment assembly comprises: An expansion member; the expansion member is disposed in the positioning claw (11) and is movably installed along the axial direction of the positioning claw (11), and is used to expand and support the positioning claw (11); An expansion and support positioning member; the expansion and support positioning member is used to position the expansion and support member on the inner periphery of the positioning claw (11); the expansion and support positioning member is movable or deformable.

3. The inclinometer auxiliary positioning tool (1) according to claim 2, characterized in that: The positioning claw adjustment assembly also includes an outer cylinder (12); the expansion positioning member includes an elastic member (14); the positioning claw (11) includes a plurality of pawls, all of which are arranged on the circumference of the outer cylinder (12); the expansion member and the elastic member (14) are both arranged in the outer cylinder (12), and are distributed in sequence from the outside to the inside along the axial direction of the outer cylinder (12); the elastic member (14) is retracted and expanded along the axial direction of the outer cylinder (12), and one end of the elastic member (14) is in contact with the axial end of the expansion member.

4. The inclinometer auxiliary positioning tool (1) according to claim 3, characterized in that: The expansion member comprises an inner tube (13); a third connection portion for connecting a salvaging tool (3) is provided inside the outer tube (12); the inner tube (13), the elastic member (14) and the third connection portion are sequentially distributed from outside to inside along the axial direction of the outer tube (12); the elastic member (14) is hollow, and the salvaging tool (3) can be sequentially inserted into the positioning claw (11), the inner tube (13) and the elastic member (14) to squeeze the elastic member (14) and connect to the third connection portion.

5. The inclinometer auxiliary positioning tool (1) according to claim 4, characterized in that: A first step (121), a second step (122) and a third step (123) are provided inside the outer cylinder (12); the first step (121), the second step (122) and the third step (123) are gradually reduced from outside to inside along the axial direction of the outer cylinder (1); the outer diameter of the inner cylinder (13) is smaller than the inner diameter of the second step (122) and larger than the inner diameter of the third step (123); the other end of the elastic body (14) is fixed to the third step (123).

6. The inclinometer auxiliary positioning tool (1) according to claim 5, characterized in that: The third connection portion is specifically a first reverse thread (15) provided on the inner wall of the third step (123).

7. The inclinometer auxiliary positioning tool (1) according to any one of claims 1 to 6, characterized in that: The positioning rod comprises a push rod (100), a length adjuster (110) and an extension rod (120); the push rod (100), the length adjuster (110) and the extension rod (120) are sequentially distributed along the axial direction of the positioning rod and are detachably connected in pairs; the second connecting portion is provided on the push rod (100), and the first connecting portion is provided on the extension rod (120); the push rod (100) and the extension rod (120) are both fixed rods, and the length adjuster (110) is a telescopic rod.

8. The inclinometer auxiliary positioning tool (1) according to claim 7, characterized in that: The length adjuster (110) comprises an adjusting outer cylinder (16), an adjusting rod (17) and a connecting pin; the adjusting outer cylinder (16) and the adjusting rod (17) are sleeved with each other and movably connected along the axial direction; a pin hole (161) is provided on the circumferential side of the adjusting outer cylinder (16), and an axially extending positioning groove (171) is provided on the circumferential side of the adjusting rod (17); the connecting pin penetrates through the pin hole (161) and is embedded in and pressed against the positioning groove (171) to achieve relative fixation of the adjusting outer cylinder (16) and the adjusting rod (17).

9. The inclinometer auxiliary positioning tool (1) according to claim 8, characterized in that: The adjusting outer cylinder (16) is provided with a first connecting thread (162) inside; the adjusting rod (17) comprises a connecting rod (172) and a connecting sleeve (173); the connecting rod (172) is provided with a second connecting thread (174) for connecting to the first connecting thread (162); and the connecting sleeve (173) is provided with a through hole (175) penetrating in the radial direction.

10. A salvaging tool (3) for salvaging the inclinometer auxiliary positioning tool (1) according to claim 6, characterized in that: The invention comprises a salvage rod (31); one end of the salvage rod (31) is provided with a salvage head (32) and an open lock ring (33), and the other end of the salvage rod (31) is provided with a cable connector; the peripheral side of the open lock ring (33) is provided with an axially through opening, and the peripheral side surface of the open lock ring (33) is provided with a second reverse thread (34); the radial dimension of the open lock ring (33) that is not compressed and deformed, the inner diameter of the third step (123), and the radial dimension of the salvage head (32) are successively reduced; When the fishing head (32) and the split lock ring (33) are sequentially inserted into the positioning rod, the split lock ring (33) is compressed and squeezed into the third step (123) so that the second reverse thread (34) is threadably connected with the first reverse thread (15).

11. The fishing tool (3) according to claim 10, characterized in that: The fishing rod (31) comprises a rod I (311) and a rod II (312); the adjacent axial ends of the rod I (311) and the rod II (312) are sleeved together and fixedly connected by shear nails (35); one end of the rod I (311) is provided with the fishing head (32) and the open locking ring (33), and the other end of the rod I (311) is provided with an inserting portion (36) for inserting and fixing a universal fishing tube (4).

12. A drilling tool, characterized in that: The invention comprises a drilling tool (2), an inclinometer (5) and an inclinometer auxiliary positioning tool (1) according to any one of claims 1 to 9; the drilling tool (2) comprises a first connecting section (21), a second connecting section (22) and a tail drill rod (23); the first connecting section (21), the second connecting section (22) and the tail drill rod (23) are all sleeve-shaped, and the first connecting section (21) and the tail drill rod (23) are respectively installed at two ends of the second connecting section (22); the first connecting section (21) is provided with a drill bit (24); A limiting platform (25) is provided in the second connection joint (22) for the positioning claw (11) to expand and position; the inclinometer (5) and the inclinometer auxiliary positioning tool (1) are inserted into the second connection joint (22) together.

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