Resistance-encountering indicating device
By introducing an obstruction indicator device into the direct-push logging equipment, the obstruction location can be determined by detecting changes in fluid pressure using a mandrel. This solves the problem of inaccurate obstruction determination in existing technologies, improves logging efficiency, and reduces costs.
Patent Information
- Application Number
- CN202520438020.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Existing direct-push logging equipment cannot accurately determine the location of obstruction during construction, resulting in low logging efficiency and increased costs.
Design an obstruction indication device that connects the drill bit and the detection equipment. By changing the state of the drain hole when an obstruction is encountered, the device detects the change in fluid pressure and thus determines the location of the obstruction.
It enables accurate identification of obstruction locations on the ground, improving logging efficiency and reducing logging costs.
Smart Images
Figure CN223676248U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to well logging technical field especially relates to resistance indicating device. BACKGROUND
[0002] The straight push type logging equipment is widely used in the field of oil and natural gas exploitation, and is very important exploration equipment. The existing straight push type logging equipment mostly adopts the mode that the drilling tool is used in cooperation with the logging instrument, the drilling tool is arranged at the front end of the logging instrument, and the logging instrument is used to detect various data of the formation.
[0003] In the construction process of the existing straight push type logging equipment, the well wall collapses or foreign matters are blocked, so that the equipment faces the resistance situation at any time, that is, the equipment is blocked by the earth or rock and the like from the bottom wall and goes deep into the ground. Since the drilling tool and the logging instrument are all deep into the ground, the ground operating personnel cannot judge the specific position where the resistance occurs, that is, whether the resistance position is the drilling tool section or the logging instrument section cannot be distinguished. Therefore, in order to avoid damage to the logging instrument and reduce the construction cost of secondary logging, the ground can only lift the logging instrument, and after the drilling tool is finished, the logging instrument is deep into the wellbore.
[0004] The existing logging equipment cannot judge the stuck position on the ground, which seriously affects the logging work efficiency and also increases the logging cost. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing an instrument resistance indicating device, which can conveniently judge the specific position where the resistance of the logging equipment occurs on the ground, improve the logging work efficiency, and also reduce the logging cost.
[0006] In order to achieve the purpose, the utility model adopts the following technical scheme:
[0007] A resistance indicating device is connected with a drilling tool and a detection equipment, and comprises:
[0008] A main body, a through hole is arranged in the main body along the axial direction, one end of the main body is connected with the drilling tool, and a flow discharge hole is arranged in the main body and communicates with the through hole;
[0009] A mandrel is inserted into the through hole from the other end of the main body, the mandrel can move along the axial direction of the through hole, one end of the mandrel outside the main body is connected with the detection equipment, and the mandrel has a first position state of closing the flow discharge hole and a second position state of opening the flow discharge hole;
[0010] A detection piece is arranged in the main body and is used to detect the liquid flow pressure flowing through the through hole and the flow discharge hole.
[0011] As an optional solution of the resistance encountering indication device, the core shaft is provided with a flow guide part at one end of the main body, the flow guide part is outwardly convex in a conical shape, and the top of the flow guide part is transitioned through an arc surface.
[0012] As an optional solution of the resistance encountering indication device, a plurality of flow leakage holes are uniformly arranged along the circumference of the main body.
[0013] As an optional solution of the resistance encountering indication device, the core shaft is provided with a blocking part, the blocking part is a circumferential rotary body, when the core shaft is in the first position state, the blocking part blocks the flow leakage hole.
[0014] As an optional solution of the resistance encountering indication device, the inner wall of the through hole is inwardly convex to be provided with a limiting part, the limiting part is in abutment with the blocking part in the axial direction.
[0015] As an optional solution of the resistance encountering indication device, the main body is internally provided with an elastic member, one end of the elastic member is in abutment with the main body, the other end of the elastic member is in abutment with the core shaft, and the elastic member is used to extrude the core shaft to move the core shaft to the second position state.
[0016] As an optional solution of the resistance encountering indication device, the core shaft is sleeved with a connecting seat and a locking member, part of the structure of the connecting seat is arranged in the through hole, the position of the connecting seat in the axial direction is adjustable, the elastic member is in abutment with the connecting seat, the locking member is screwed with the core shaft, and the locking member is in abutment with the connecting seat.
[0017] As an optional solution of the resistance encountering indication device, the elastic member is a butterfly spring, and the butterfly spring is sleeved on the core shaft.
[0018] As an optional solution of the resistance encountering indication device, the core shaft is sleeved with a rotating member, and the core shaft can be freely rotated in the axial direction relative to the main body through the rotating member.
[0019] As an optional solution of the resistance encountering indication device, the rotating member is a sliding bearing.
[0020] Beneficial effects:
[0021] In the utility model, the combination string formed by the connected drilling tool, the resistance encountering indicating device and the detection equipment is deeply put into the wellbore, when the combination string encounters resistance, the pressure can be added on the circulating flow path of the mud, and the liquid flow pressure flowing through the through hole and the flow hole is detected through the detection piece, if the pressure detected by the detection piece does not obviously change, it shows that the whole mud is well circulated on the flow path, at this time, the mandrel should be in the second position state of opening the flow hole, therefore the position encountering resistance does not occur in the detection equipment section, reversely it is known that the position encountering resistance occurs in the drilling tool section, if the pressure detected by the detection piece suddenly changes or even the pressure holding phenomenon occurs, it shows that the circulation flow path of the whole mud is blocked, at this time, the mandrel should be in the first position state of plugging the flow hole, the detection equipment section is blocked and reversely pushes the mandrel to make the mandrel close the flow hole, therefore the position encountering resistance occurs in the detection equipment section. Through the resistance encountering indicating device, the specific position of the resistance encountering of the well logging equipment can be conveniently judged by the ground personnel, and if the condition allows, after the ground personnel know that the position encountering resistance occurs in the drilling tool section, the drilling tool can be continuously rotated to deeply put into the wellbore to complete the well logging operation without lifting the combination string, the well logging efficiency is effectively improved, and the well logging cost is reduced, after the ground personnel know that the position encountering resistance occurs in the detection equipment section, in order to avoid the secondary damage of the detection equipment, the combination string can be put forward in combination with the requirement of the construction party, after the secondary well passing is completed, the well logging operation is continuously carried out to deeply put into the wellbore, therefore, the resistance encountering indicating device can provide the auxiliary judgment basis for the deep well detection operation. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is part structure schematic view of resistance encountering indicating device provided by the utility model embodiment.
[0023] In the drawing:
[0024] 1, main body;11, through hole;12, flow hole;13, limiting part;14, installation slot;
[0025] 2, mandrel;21, flow guide part;22, blocking part;3, elastic piece;4, connecting seat;5, locking piece;6, rotating piece. DETAILED DESCRIPTION
[0026] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all structures.
[0027] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through the indirect connection of intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.
[0028] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them.And, the first feature "on", "above" and "on" the second feature includes the first feature directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature "under", "below" and "under" the second feature includes the first feature directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.
[0029] In the description of the embodiment, the terms "up", "down", "right", etc.Orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0030] Please refer to the attached Figure 1 The embodiment relates to a resistance indicating device for connecting a drilling tool and a detection equipment, which comprises a main body 1, a mandrel 2 and a detection piece.The main body 1 is provided with a through hole 11 penetrating in the axial direction inside the main body 1, one end of the main body 1 is connected with the drilling tool, the main body 1 is provided with a flow leakage hole 12, the flow leakage hole 12 is communicated with the through hole 11, the mandrel 2 is inserted into the through hole 11 from the other end of the main body 1, the mandrel 2 can move along the axial direction of the through hole 11, one end of the mandrel 2 outside the main body 1 is connected with the detection equipment, the mandrel 2 has a first position state of closing the flow leakage hole 12 and a second position state of opening the flow leakage hole 12, and the detection piece is used for detecting the liquid flow pressure flowing through the through hole 11 and the flow leakage hole 12.
[0031] Specifically, the main body 1 is a cylindrical shaft structure adapted to the radial size of the borehole, a cylindrical through hole 11 is formed in the main body 1 along the axial direction, and a flow leakage hole 12 is formed in the sidewall of the main body 1. One end of the main body 1 can be connected to the drilling tool, and the mandrel 2 is a circumferential rotary body inserted into the through hole 11. The mandrel 2 is used to connect the detection device, and the mandrel 2 can move in the axial direction of the through hole 11. The mud can flow through the water hole of the drilling tool, the through hole 11, the flow leakage hole 12, and the gap between the outer wall of the main body 1 and the inner wall of the borehole, and circulate in the flow path.
[0032] During operation, the operator inserts the combined string formed by the connected drilling tool, the resistance encountering device, and the detection device into the borehole. When the combined string encounters resistance, the pressure on the circulating flow path of the mud can be increased, and the pressure of the liquid flowing through the through hole 11 and the flow leakage hole 12 can be detected by the detection member. If the pressure detected by the detection member does not change significantly, it indicates that the entire circulating flow path of the mud is unobstructed. At this time, the mandrel 2 should be in the second position state of opening the flow leakage hole 12, so the resistance encountering position is not in the detection device section. Conversely, it is known that the resistance encountering position is in the drilling tool section. If the pressure detected by the detection member changes suddenly or even causes pressure to be blocked, it indicates that the entire circulating flow path of the mud is obstructed. At this time, the mandrel 2 should be in the first position state of blocking the flow leakage hole 12. When the detection device section is deep into the obstruction, the mandrel 2 is pushed in the opposite direction to close the flow leakage hole 12, so the resistance encountering position is in the detection device section. When the ground personnel learn that the resistance encountering position is in the drilling tool section, they can consult the construction team to determine whether to continue to deepen the borehole. If the conditions allow, the drilling tool can be rotated to deepen the borehole without lifting the combined string to complete the logging operation. This can effectively improve the logging efficiency and reduce the logging cost. When the ground personnel learn that the resistance encountering position is in the detection device section, in order to avoid secondary damage to the detection device, the combined string can be proposed in combination with the requirements of the construction party. After the secondary well is opened, the logging operation can be continued to deepen the borehole.
[0033] In this embodiment, the detection member can be a conventional pressure sensor placed on the ground, which is used to monitor the mud pressure on the circulating flow path, thereby assisting in determining the resistance encountering position of the entire combined string.
[0034] Optionally, the flow leakage hole 12 is uniformly provided with a plurality of flow leakage holes along the circumference of the main body 1.
[0035] In the embodiment, the leakage holes 12 are evenly arranged along the circumferential outer wall of the main body 1, and the leakage holes 12 are circular holes arranged obliquely. Those skilled in the art can understand that the specific number of the leakage holes 12 can be selected according to the scouring condition of the leakage pressure on the inner wall of the wellbore, and by evenly distributing the plurality of leakage holes 12 along the circumferential outer wall, the impact force of the pressurized mud after passing through the leakage holes 12 can be used to keep the main body 1 relatively balanced, thereby avoiding the torque of the main body 1 in the wellbore and affecting the deep well operation.
[0036] Further, the mandrel 2 is provided with a blocking part 22, which is a circumferential rotary body. When the mandrel 2 is in the first position state, the blocking part 22 blocks the leakage holes 12.
[0037] In the embodiment, one end of the mandrel 2 is provided with a blocking part 22, which is a cylindrical structure matched with the through hole 11. The diameter of the blocking part 22 matches the diameter of the through hole 11, so as to avoid the mud flowing into the gap between the blocking part 22 and the through hole 11, thereby affecting the movement flexibility of the mandrel 2. The cylindrical structure of the blocking part 22 can realize the movement of the mandrel 2 while blocking the plurality of leakage holes 12 distributed along the circumference of the main body 1, so that the shape and structure design of the mandrel 2 are more simple.
[0038] Further, the inner wall of the through hole 11 is inwardly convexly provided with a limiting part 13, which abuts against the blocking part 22 in the axial direction.
[0039] In the embodiment, the limiting part 13 is an annular boss formed on the inner wall of the through hole 11. When the mandrel 2 is assembled into the through hole 11, the end face of the annular boss can directly abut against the blocking part 22, thereby facilitating the axial positioning of the mandrel 2.
[0040] Further, the mandrel 2 placed at one end of the main body 1 is provided with a flow guide part 21, which is outwardly convex and conical, and the top of the flow guide part 21 is transitioned through an arc surface.
[0041] In the embodiment, the flow guide part 21 is a mushroom head with a smooth top and a convex shape. The setting of the flow guide part 21 can avoid the vortex formed by the planar end of the mandrel 2 when the pressurized mud flows through the water eye, thereby playing a role of guiding flow and ensuring the stability of the liquid flow.
[0042] Optionally, the main body 1 is internally provided with an elastic member 3, one end of which abuts against the main body 1, and the other end of which abuts against the mandrel 2. The elastic member 3 is used to press the mandrel 2 so as to move the mandrel 2 to the second position state.
[0043] In the embodiment, the elastic member 3 is a butterfly spring, the main body 1 is internally provided with a mounting groove 14, the butterfly spring is arranged in the mounting groove 14, and the butterfly spring is sleeved on the mandrel 2. During the process that the entire combined string is inserted into the wellbore, the elastic member 3 always presses the mandrel 2, so as to ensure that the mandrel 2 is always in the second position state in a free state (a state without resistance). When the detection device is blocked, the mandrel 2 moves reversely by a distance under the force and compresses the elastic member 3 to store energy. When the blocking effect of the detection assembly is removed, the elasticity of the elastic member 3 restores to press the mandrel 2 to continue to keep the second position state. Those skilled in the art can understand that the rigidity of the butterfly spring can be reasonably set according to the pressure range of the detection device when the detection device is blocked and the movement stroke of the mandrel 2 in the axial direction from the second position state to the first position state, so that the butterfly spring can be conveniently selected. Therefore, the threshold setting of the downhole pressure of the combined string can be realized by the selection of the butterfly spring or the combined arrangement of a plurality of butterfly springs.
[0044] Optionally, the mandrel 2 is sleeved with a connecting seat 4 and a locking member 5. Part of the structure of the connecting seat 4 is arranged in the through hole 11, the connecting seat 4 is adjustable in the axial direction, the elastic member 3 abuts against the connecting seat 4, and the locking member 5 is screwed with the mandrel 2 and abuts against the connecting seat 4.
[0045] Specifically, the connecting seat 4 is a circumferential rotary body, the connecting seat 4 can limit the elastic member 3 in the axial direction, the connecting seat 4 can adapt to different elastic members 3 by adjusting the position in the axial direction, and the connecting seat 4 can be locked by the locking member 5 after the adjustment of the position in the axial direction is completed. The locking member 5 can adopt a screw sleeve and be screwed with the mandrel 2.
[0046] In the embodiment, the connecting seat 4 and the locking member 5 can stably limit the elastic member 3 in the axial direction.
[0047] Optionally, the mandrel 2 is sleeved with a rotating member 6, and the mandrel 2 can freely rotate relative to the main body 1 in the axial direction through the rotating member 6.
[0048] In the embodiment, the rotating member 6 can adopt a common sliding bearing, a sliding sleeve, a sliding pad or a sliding ring and the like structure. Specifically, one end of the rotating member 6 can abut against one end of the blocking portion 22 away from the flow guide portion 21, and the other end of the rotating member 6 can abut against the limiting portion 13 of the main body 1, so as to realize the free rotation of the mandrel 2 in the interior of the main body 1.
[0049] When the drilling tool is unblocked, it can be necessary to slowly rotate the drilling tool. By arranging the rotating member 6, when the drilling tool is rotated, the torque of the drilling tool can be released, so as to avoid damage to the detection device caused by the torque.
[0050] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.
Claims
1. A device for indicating a resistance encountered by a drill string and a detection device, characterized in that The utility model relates to a kind of drilling device, including: Main body (1), the through hole (11) is opened in the axial direction inside, one end of the main body (1) is connected with the drilling device, the main body (1) is provided with the flow hole (12), the flow hole (12) is communicated with the through hole (11); Spindle (2), the other end of the spindle (2) is inserted in the through hole (11) by the main body (1), the spindle (2) can be moved along the axial direction of the through hole (11), the spindle (2) is connected with the detection equipment at the end outside the main body (1), the spindle (2) has the first position state of closing the flow hole (12) and the second position state of opening the flow hole (12); Detection piece, the detection piece is used to detect the liquid flow pressure flowing through the through hole (11) and the flow hole (12).
2. The obstruction indicating device of claim 1, wherein, The end of the spindle (2) is provided with the flow guide part (21) in the main body (1), the flow guide part (21) is convex conical and the top of the flow guide part (21) is transitioned by arc surface.
3. The obstruction indicating device of claim 1, wherein, The flow hole (12) is evenly provided with a plurality of along the circumferential direction of the main body (1).
4. The obstruction indicating device of claim 1, wherein, The spindle (2) is provided with the blocking part (22), the blocking part (22) is circumferential rotary body, when the spindle (2) is located in the first position state, the blocking part (22) blocks the flow hole (12).
5. The obstruction indicating device of claim 4, wherein, The inner wall of the through hole (11) is provided with the limiting part (13) inwards, the limiting part (13) is in contact with the blocking part (22) in the axial direction.
6. The obstruction indicating device of claim 1, wherein, The main body (1) is provided with the elastic member (3) inside, one end of the elastic member (3) is in contact with the main body (1), the other end is in contact with the spindle (2), the elastic member (3) is used to extrude the spindle (2) to make the spindle (2) move to the second position state.
7. The obstruction indicating device of claim 6, wherein, The spindle (2) is provided with the connecting seat (4) and the locking member (5), part of the structure of the connecting seat (4) is placed in the through hole (11), the position of the connecting seat (4) can be adjusted along the axial direction, the elastic member (3) is in contact with the connecting seat (4), the locking member (5) is screwed with the spindle (2), the locking member (5) is in contact with the connecting seat (4).
8. The obstruction indicating device of claim 6, wherein, The elastic member (3) is butterfly spring, the butterfly spring is sleeved on the spindle (2).
9. The obstruction indicating device of claim 1, wherein, The spindle (2) is provided with the rotating member (6), the spindle (2) can be freely rotated in the axial direction relative to the main body (1) by the rotating member (6).
10. The obstruction indicating device of claim 9, wherein, The rotating member (6) is sliding bearing.