Real-time drilling tool jamming risk assessment device and method for well drilling

Abstract

The invention relates to the field of petroleum and natural gas exploration and development, in particular to a real-time drilling jamming risk assessment device and method for well drilling, the device comprises a drill bit and a drill column, and an acquisition assembly for acquiring information is arranged on the outer side of the drill column; the collecting assembly comprises an outer pipe and a controller, and the top of the outer pipe is fixedly connected with a combustible gas detector; a flexible pipe is in sliding fit with the inner wall of the outer pipe, a plurality of strain sensors are embedded in the flexible pipe in the length direction of the flexible pipe, and the controller is used for receiving strain signals of the strain sensors and calculating the deformation quantity of the flexible pipe; the inner wall of the flexible pipe is fixedly connected with an inner pipe, and the bottom of the inner pipe is circumferentially and fixedly connected with a plurality of transverse telescopic rods; the lower portion of the outer side wall of the drill column is circumferentially provided with a plurality of clamping grooves for the telescopic rods to stretch out and draw back. The drill stem is fixedly connected with a rotating speed sensor and a temperature sensor respectively; the system is complete in structure and comprehensive in function, and can effectively improve the accuracy and comprehensiveness of drilling tool jamming risk assessment.

Description

Technical Field

[0001] The invention relates to the field of oil and natural gas exploration and development, and in particular to a real-time drilling stuck pipe risk assessment device and method. Background Art

[0002] Pipe sticking is a common and complex failure in drilling. The occurrence of pipe sticking failure will not only lead to the interruption of drilling operations, but also damage the drilling equipment. In severe cases, it may even cause safety accidents. Therefore, it is of great significance to monitor and evaluate the risk of pipe sticking in real time. The traditional method of monitoring the risk of pipe sticking mainly relies on the experience of operators and the inversion judgment of drilling data. This method has the problems of strong subjectivity and low accuracy. With the continuous development of drilling technology, people have begun to explore the use of advanced sensors and data analysis technologies to monitor and evaluate the risk of pipe sticking in real time.

[0003] The stuck drill risk assessment device is an important technological innovation in the field of oil and gas exploration and development. It can monitor and assess the risk of stuck drill in real time during drilling, provide early warning for operators, and effectively avoid the occurrence of stuck drill failures, thereby improving drilling timeliness and economic benefits. However, the stuck drill risk assessment device in the prior art usually uses the method of while drilling data acquisition for monitoring, which can only monitor various data around the drill bit in real time to assess the stuck drill risk, and lacks monitoring of the entire wellbore, thus affecting the accuracy of the stuck drill risk assessment.

[0004] In summary, the existing stuck drill risk assessment device can only monitor various data around the drill bit in real time to assess the stuck drill risk, but lacks monitoring of the entire wellbore, which affects the accuracy of the stuck drill risk assessment. This problem has become a difficult problem that needs to be solved in this field. Therefore, it is necessary to propose a real-time stuck drill risk assessment device and method for drilling that can simultaneously detect various data of the wellhead, well diameter and drill bit. Summary of the invention

[0005] To solve the above problems, the present invention provides a real-time drilling stuck drill risk assessment device and method. Through the design of the acquisition component, the wellhead combustible gas concentration, well diameter change and drill bit rotation are monitored simultaneously, and the drill stuck risk is assessed from multiple aspects, thereby improving the accuracy and comprehensiveness of the drill stuck risk assessment.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a real-time drilling stuck drill risk assessment device comprises a drill bit and a drill string, and a collection component for collecting information is arranged on the outside of the drill string.

[0007] The acquisition component includes an outer tube and a controller. A plurality of combustible gas detectors are fixedly connected to the top of the outer tube in a circumferential direction. The controller is used to receive the combustible gas concentration transmitted by the combustible gas detector. A flexible tube is slidably fitted on the inner wall of the outer tube. A plurality of strain sensors are embedded and installed in the flexible tube along its length direction. The controller is used to receive the strain signal transmitted by the strain sensor and calculate the shape variable of the flexible tube based on the strain signal. An inner tube is fixedly connected to the inner wall of the flexible tube. A plurality of transversely retractable telescopic rods are fixedly connected to the bottom of the inner tube in a circumferential direction. The controller is used to control the opening and closing of the telescopic rods. A plurality of slots for retracting and extending the telescopic rods are circumferentially provided on the lower part of the outer wall of the drill string. A speed sensor and a temperature sensor are fixedly connected to the drill string respectively. The controller is used to receive the speed signal and the temperature signal transmitted by the speed sensor and the temperature sensor.

[0008] The technical principles of the above scheme are as follows:

[0009] Put the assembled drill string into the inner tube, start the telescopic rod through the controller, and insert the telescopic rod into the slot to fix the inner tube and the drill string; lower the drill string, and since the flexible tube and the outer tube slide together and the flexible tube and the inner tube are fixedly connected, the flexible tube and the inner tube move downward with the drill string.

[0010] The controller uses a combustible gas detector to monitor the concentration of combustible gas at the wellhead, a strain sensor to monitor the strain of the flexible pipe, and a temperature sensor to monitor the temperature of the drill bit; the controller then calculates and analyzes various data to assess the risk of drill sticking.

[0011] The above scheme has the following beneficial effects:

[0012] 1. The present invention provides stable support and protection for the entire device through the design of the outer tube. At the same time, a combustible gas detector is fixedly connected to the top of the outer tube. Since the combustible gas can only flow out through the wellhead, the combustible gas detector can monitor the combustible gas concentration at the wellhead in real time. Once the combustible gas concentration exceeds the standard, the combustible gas detector will immediately alarm to remind the operator to handle it and avoid accidents.

[0013] 2. The present invention can effectively monitor the changes in wellbore diameter through the design of the flexible tube. If there are dropped objects in the wellbore annulus, when the flexible tube contacts the dropped objects in the annulus, the flexible tube will be squeezed and deformed. At this time, the strain sensor will monitor the deformation of the flexible tube to determine the size of the dropped objects, and then determine the number and range of the dropped objects according to the deformation range of the flexible tube at different depths of the wellbore, so as to evaluate whether there is a risk of wellbore collapse and the risk of dropped objects affecting the rotation of the drill bit; at the same time, according to the deformation of the flexible tube, the change in wellbore diameter can also be determined, so as to determine whether the drill bit can pass smoothly and whether there is a risk of drill sticking.

[0014] 3. The present invention embeds and installs a rotation speed sensor and a temperature sensor on the drill string, thereby monitoring the rotation speed and temperature of the drill bit in real time, judging whether the drill bit is in good condition and whether drilling is smooth. The design of the inner tube provides a good drilling environment for the drill string and the drill bit, and the design of the telescopic rod and the slot enables the flexible tube and the inner tube to move with the drill bit and the drill string, thereby realizing the monitoring of the entire wellbore.

[0015] 4. The present invention simultaneously monitors the wellhead combustible gas concentration, wellbore changes and drill bit rotation conditions, and evaluates the risk of stuck drill from multiple aspects, thereby effectively improving the accuracy and comprehensiveness of the stuck drill risk assessment.

[0016] Furthermore, a plurality of support frames are fixedly connected to the outer wall of the lower portion of the outer tube along its circumference.

[0017] Beneficial effect: The design of the support frame can further provide stable support for the entire device, so that drilling can be carried out more stably, thereby improving the accuracy of the risk assessment of stuck drill.

[0018] Furthermore, a waterproof camera is fixedly connected to the inner wall of the inner tube, and the controller is used to receive image information collected by the waterproof camera.

[0019] Beneficial effects: The operator can directly observe the real-time image in the well through the waterproof camera, so as to directly observe the drilling situation, conduct manual risk assessment of drill stuck, and increase the accuracy of risk assessment of drill stuck. The waterproof camera is used to avoid being affected by water and improve its working stability.

[0020] Furthermore, the flexible pipe is made of polyethylene telescopic pipe.

[0021] Beneficial effect: The flexible tube is made of polyethylene telescopic tube, which ensures that the flexible tube can be stably deformed and can gradually cover the entire wellbore as the drill string and drill bit move, greatly improving the comprehensiveness and accuracy of the detection.

[0022] Furthermore, the inner tube is made of a stainless steel telescopic pipe.

[0023] Beneficial effect: The inner tube is made of stainless steel telescopic pipe, which ensures that the inner tube can stably provide movement space for the drill bit and drill string, and can also move with the movement of the drill string. The stainless steel material can effectively prevent the inner tube from being corroded by drilling fluid and underground fluid, thereby ensuring the continuous and stable operation and life of the drill bit and drill string, thereby improving the stability of risk assessment.

[0024] Furthermore, a plurality of handrail frames are fixedly connected to the outer wall of the upper portion of the outer tube along its circumference.

[0025] Beneficial effect: The design of the handrail makes the handling and assembly of the entire device more convenient and labor-saving.

[0026] Furthermore, a fixing hole is provided at one end of the support frame away from the outer tube, and a fixing nail is slidably fitted in the fixing hole.

[0027] Beneficial effect: When fixing the device, the fixing nails are driven into the ground around the wellhead through the fixing holes, which effectively improves the overall stability of the device and enables the device to operate better.

[0028] Furthermore, a real-time drilling stuck pipe risk assessment method comprises the following steps:

[0029] S1, device installation: put the assembled drill string and drill bit into the inner tube, start the telescopic rod, so that the output end of the telescopic rod engages with the slot on the drill string; align the inner tube with the wellhead, place the outer tube vertically at the wellhead, and fix the support frame with fixing nails.

[0030] S2, data collection: After the drill string is lowered, drilling begins; use a combustible gas detector to monitor the combustible gas concentration at the wellhead; use a strain sensor to monitor the strain of the flexible pipe; use a waterproof camera to monitor the image inside the well in real time; use a speed sensor to monitor the drill bit speed in real time; use a temperature sensor to monitor the drill bit temperature in real time.

[0031] S3, risk assessment: set preset values ​​and preset curves for various data based on historical drilling data; compare the monitored data with the preset values ​​in real time, determine in real time whether the data exceeds the preset values, and assess the risk level; compare the change curve of each data with the preset curve, determine in real time whether the trend of the change curve is consistent with the trend of the preset curve, and assess the risk level.

[0032] S4, device dismantling: start drilling, recover the inner tube and flexible tube, remove the fixing nails, and retrieve the device.

[0033] Furthermore, in S3, the preset value of each data refers to the maximum load value of each data, including the preset value of the wellhead combustible gas concentration, the preset value of the drill bit temperature, the preset value of the drill bit speed and the preset value of the flexible pipe strain.

[0034] Furthermore, in S3, the preset curves of various data include a preset value of wellhead combustible gas concentration, a preset curve of drill bit temperature, a preset curve of drill bit speed, and a preset curve of flexible pipe strain.

[0035] Beneficial effects: The present invention can effectively monitor the combustible gas concentration at the wellhead, the change in well diameter and the rotation of the drill bit, and set the preset values ​​corresponding to each data according to the historical drilling data, and according to the difference between each measured data and the preset value, it can specifically judge the stuck drill situation at various parts of different well depths during drilling. Compared with the existing technology, it is more comprehensive and specific, so that drilling personnel can better reduce the risk of stuck drill, thereby shortening the operation cycle, reducing the operation cost and reducing personal injury. Therefore, it effectively reduces economic losses and casualties.

[0036] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is an axonometric diagram of a real-time risk assessment device for drilling stuck in an embodiment of the present invention.

[0038] Figure 2 It is a cross-sectional view of a real-time stuck pipe risk assessment device for drilling in an embodiment of the present invention.

[0039] Figure 3 It is a top view of the real-time stuck pipe risk assessment device for drilling in an embodiment of the present invention.

[0040] Figure 4 Flow chart of a real-time stuck pipe risk assessment method for drilling in an embodiment of the present invention.

[0041] The figure marks in the drawings of the specification include: 1. outer tube; 2. flexible tube; 3. inner tube; 4. support frame; 5. strain sensor; 6. combustible gas detector; 7. telescopic rod; 8. waterproof camera; 9. handrail. DETAILED DESCRIPTION

[0042] The following is further described in detail through specific implementation methods:

[0043] Embodiment 1:

[0044] As attached Figure 1-Figure 3 Shown: A real-time drilling stuck drill risk assessment device includes a drill bit and a drill string, and a collection component for collecting information is provided on the outside of the drill string.

[0045] The acquisition component includes an outer tube 1 and a controller. A plurality of combustible gas detectors 6 are fixedly connected to the top of the outer tube 1 by circumferential bolts, and the controller is used to receive the combustible gas concentration transmitted by the combustible gas detector 6; a flexible tube 2 is slidably fitted on the inner wall of the outer tube 1, and a plurality of strain sensors 5 are embedded and installed in the flexible tube 2 along its length direction, and the controller is used to receive the strain signal transmitted by the strain sensor 5 and calculate the deformation amount of the flexible tube 2 based on the strain signal; an inner tube 3 is fixedly connected to the inner wall of the flexible tube 2 by bolts, and a plurality of transversely retractable telescopic rods 7 are fixedly connected to the bottom of the inner tube 3 by circumferential bolts, and the controller is used to control the opening and closing of the telescopic rods 7; a plurality of slots for retracting the telescopic rods 7 are circumferentially opened on the lower part of the outer wall of the drill string close to the inner tube 3; a speed sensor and a temperature sensor are fixedly connected to the drill string by bolts, and the controller is used to receive the speed signal and the temperature signal transmitted by the speed sensor and the temperature sensor.

[0046] The flexible tube 2 is made of a polyethylene telescopic tube; the inner tube 3 is made of a stainless steel telescopic pipe.

[0047] The specific implementation process is as follows: first, assemble the drill bit and the drill string, and put the assembled drill bit and drill string into the inner tube 3, so that the slot on the drill string is aligned with the output end of the telescopic rod 7; at this time, the telescopic rod 7 is started by the controller, and the output shaft of the telescopic rod 7 extends out and is respectively inserted into the adjacent slots, so that the inner tube 3 and the drill string are connected as a whole.

[0048] Then, align the drill bit with the wellhead, start the drill bit, and extend the drill string into the wellhead; at this time, since the flexible tube 2 and the outer tube 1 are slidably matched, and the flexible tube 2 and the inner tube 3 are bolted and fixedly connected, the flexible tube 2 and the inner tube 3 move downward with the drill string. During the downward movement, since the drill bit enters the wellbore first, the drill bit will first break the rock in the wellbore; therefore, if the drill bit can pass through, it will not affect the passage of the flexible tube 2 and the inner tube 3; if the drill bit cannot pass through, the controller will determine that there is a greater risk of drill jamming here. During the drilling process, the operator can inject coolant into the drill bit through the inner tube 3.

[0049] Because the flexible tube 2 is made of polyethylene telescopic tube, the flexible tube 2 can be stably deformed and gradually cover the entire wellbore as the drill string and the drill bit move, so that the strain sensor 5 can monitor the wellbore wall conditions at all depths in the wellbore, greatly improving the comprehensiveness and accuracy of the detection.

[0050] Based on the same principle, the inner tube 3 is made of a stainless steel telescopic pipe, so the inner tube 3 can provide a stable movement space for the drill bit and the drill string, and can also enable the inner tube 3 to move with the drill string and the drill bit. The stainless steel material can effectively prevent the inner tube 3 from being corroded by the drilling fluid and underground fluid, thereby ensuring the continuous and stable operation of the drill bit and the drill string, thereby improving the stability of risk assessment.

[0051] During the drilling process, the outer tube 1 is stably placed at the wellhead, providing stable support and protection for the entire device. At the same time, a number of combustible gas detectors 6 are fixedly connected to the bottom of the outer tube 1 by circumferential bolts. Since the combustible gas can only flow to the outside of the well through the wellhead, the combustible gas detector 6 can monitor the combustible gas concentration at the wellhead in real time. Once the combustible gas concentration exceeds the standard, the combustible gas detector 6 will immediately alarm to remind the operator to take action to avoid accidents; the controller can evaluate the risk of combustible gas explosion accidents at the wellhead through the combustible gas concentration at the wellhead monitored by the combustible gas detector 6.

[0052] Since a number of strain sensors 5 are embedded and installed in the flexible tube 2 along its length direction, the controller can use the strain sensors 5 to effectively monitor the changes inside the wellbore. If there are dropped objects in the wellbore, when the flexible tube 2 contacts the dropped objects in the wellbore, the flexible tube 2 will be squeezed and deformed. At this time, the strain sensor 5 will monitor the change in the resistance value of the flexible tube 2, thereby analyzing the deformation range, size and total number of deformation positions of the flexible tube 2. The controller determines the diameter of the dropped objects and the number and range of the dropped objects based on the deformation range, size and total number of deformation positions of the flexible tube 2, thereby evaluating whether there is a risk of collapse inside the wellbore and the risk of a large number of dropped objects affecting the rotation of the drill bit. At the same time, using the deformation of the flexible tube 2, the controller can also determine the change in the diameter of the wellbore, thereby determining whether the drill bit can pass smoothly and whether there is a risk of drill sticking.

[0053] The operator can adjust the size and total number of acceptable flexible pipe 2 deformation positions through the controller.

[0054] For example, the operator sets the size and total number of acceptable deformation positions of the flexible tube 2 to 20% of the drill bit diameter and 10 deformation positions of the flexible tube 2 through the controller; during the drilling process, a large amount of sand and gravel falls in the wellbore above the drill bit, and the sand and gravel will collide with the flexible tube 2, causing the flexible tube 2 to deform; at the same time, the strain sensor 5 will monitor the deformation of the flexible tube 2, and the controller can analyze the diameter of the sand and gravel according to the deformation of the flexible tube 2. If the diameter of the sand and gravel exceeds 20% of the drill bit diameter, the controller will determine whether the drill bit has the risk of causing the drill to get stuck due to the large amount of sand and gravel falling; if the total number of deformation positions of the flexible tube 2 exceeds 10, the controller will determine whether the drill bit has the risk of causing the drill to get stuck due to the excessive amount of sand and gravel falling. And the controller can determine the specific well section where the sand and gravel fall in the wellbore according to the position where the sand and gravel collide with the flexible tube 2, so as to specifically analyze the well section where the risk of drill getting stuck is likely to occur, making the risk assessment of drill getting stuck more specific and accurate.

[0055] Since the speed sensor and temperature sensor are bolted to the drill string, they will monitor the speed and temperature of the drill bit in real time during the drilling process to determine whether the drill bit is in good condition and whether the drilling is going smoothly. If the drill bit temperature increases and decreases, and the drill speed decreases, it means that the resistance in the wellbore increases and the risk of drill bit sticking increases; at this time, the operator can inject coolant drilling fluid into the drill bit through the inner tube 3 to assist the drill bit in rotating and cool the drill bit at the same time; if the rotation of the drill bit still does not improve, the controller will determine that the risk of drill bit sticking in this well section has further increased.

[0056] The present invention simultaneously monitors the wellhead combustible gas concentration, wellbore changes and drill bit rotation conditions, and evaluates the risk of stuck drill from multiple aspects, thereby effectively improving the accuracy and comprehensiveness of the risk assessment of stuck drill. And through the design of the retractable flexible tube 2 and the inner tube 3, the wellbore can be more comprehensively covered, and a more comprehensive and specific detection of the wellbore can be achieved, which can not only monitor the overall changes of the wellbore, but also accurately determine the specific conditions of the wellbore at different depths. Compared with the prior art, the present invention can better assist operators in the risk assessment of stuck drill.

[0057] Embodiment 2:

[0058] As attached Figure 1-Figure 3 As shown in the figure, different from the above-mentioned embodiment, a plurality of support frames 4 are fixedly connected to the outer wall of the lower part of the outer tube 1 by bolts along its circumference.

[0059] The specific implementation process is as follows: after the outer tube 1 is fixed around the wellhead, the support frame 4 can further provide stable support for the entire device, preventing the outer tube 1 from tilting or even tipping over due to vibration during drilling, so that the drilling exploration work can be carried out more stably, thereby improving the accuracy of the risk assessment of stuck drill.

[0060] Embodiment 3:

[0061] As attached Figure 1-Figure 3 As shown: Different from the above embodiment, a waterproof camera 8 is fixedly connected to the inner wall of the inner tube 3 with bolts, and the controller is used to receive image information collected by the waterproof camera 8.

[0062] The specific implementation process is as follows: During the drilling process, the operator can directly observe the real-time image in the well through the waterproof camera 8, thereby directly observing the drilling situation, and conducting manual drill stuck risk assessment to increase the accuracy of drill stuck risk assessment. The waterproof camera 8 is used to prevent it from being affected by the coolant drilling fluid, thereby improving its working stability.

[0063] Embodiment 4:

[0064] As attached Figure 1-Figure 3As shown in the figure, different from the above-mentioned embodiment, a plurality of handrail frames 9 are fixedly connected to the outer wall of the upper portion of the outer tube 1 by bolts along its circumference.

[0065] The specific implementation process is as follows: During the assembly and transportation of the device, the operator can better control the device through the handrail frame 9, making the transportation and assembly process of the entire device more convenient and labor-saving.

[0066] Embodiment 5:

[0067] As attached Figure 1-Figure 4 As shown in the figure, different from the above-mentioned embodiment, a real-time stuck drill risk assessment method for drilling comprises the following steps:

[0068] S1, device installation: put the assembled drill string and drill bit into the inner tube 3, start the telescopic rod 7, so that the telescopic rod 7 is engaged with the slot; align the inner tube 3 with the wellhead, place the outer tube 1 vertically on the ground around the wellhead, and fix the support frame 4 with fixing nails.

[0069] S2, data collection: After lowering the drill string, start drilling; use the combustible gas detector 6 to monitor the combustible gas concentration at the wellhead; use the strain sensor 5 to monitor the strain of the flexible pipe 2; use the waterproof camera 8 to monitor the image in the well in real time; use the speed sensor to monitor the drill bit speed in real time; use the temperature sensor to monitor the drill bit temperature in real time.

[0070] S3, risk assessment: set preset values ​​and preset curves for various data based on historical drilling data; compare the monitored data with the preset values ​​in real time, determine in real time whether the data exceeds the preset values, and assess the risk level; compare the change curve of each data with the preset curve, determine in real time whether the trend of the change curve is consistent with the trend of the preset curve, and assess the risk level.

[0071] S4, device dismantling: pull out the drill, recover the shrink inner tube 3 and the flexible tube 2, take out the fixing nails, and retract the device.

[0072] In S3, the preset values ​​of various data refer to the maximum load values ​​of various data, including the preset value of wellhead combustible gas concentration, the preset value of drill bit temperature, the preset value of drill bit speed, the preset value of resistance and the preset value of flexible pipe 2 strain.

[0073] In S3, the preset curves of various data include a preset curve of wellhead combustible gas concentration, a preset curve of drill bit temperature, a preset curve of drill bit speed, a preset curve of resistance, and a preset curve of flexible pipe 2 strain.

[0074] The specific implementation process is as follows: the controller will set the preset values ​​corresponding to various data according to the historical drilling data, and monitor the wellhead combustible gas concentration, drill bit temperature, drill bit speed, resistance and flexible pipe 2 strain data at the same time, and then compare the various data with the corresponding preset values. According to the difference between each data and the preset value, the drill bit stuck situation at different well depths during drilling is judged. Compared with the existing technology, it is more comprehensive and specific, and can better reduce the risk of drill bit stuck, thereby shortening the operation cycle, reducing operation costs, and reducing personal injury.

[0075] The operator can set the risk level of drill sticking to low risk, medium risk, high risk and extra-high risk, or multiple types such as level one, level two, level three and extra level. The controller will output the current risk level of drill sticking according to different settings.

[0076] For example, the preset value of the drill bit temperature is 300°C, which means that the maximum temperature that the drill bit can withstand is 300°C. At this time, the temperature sensor detects that the drill bit temperature has exceeded 300°C, and the controller will evaluate that the risk of drill sticking in this well section is relatively high, and output the risk level of drill sticking as medium risk; if at this time the strain sensor 5 detects that the strain amount of the flexible pipe 2 is large and the total number of deformation ranges is large, the controller will determine that the risk of drill sticking in the well section is further increased, and output the risk level of drill sticking as high risk; and so on, if at this time it is detected that any one or more of the data exceeds the corresponding preset value, the controller will output the risk level of drill sticking as extremely high risk.

[0077] The present invention can effectively monitor the combustible gas concentration at the wellhead, the change in well diameter and the rotation of the drill bit, and set preset values ​​for various data according to historical drilling data, and judge the drill sticking conditions at various parts during drilling according to the differences between the actually measured data and the preset values. Compared with the prior art, the present invention is more comprehensive and specific, enabling drillers to better reduce the risk of drill sticking, thereby effectively reducing economic losses and casualties.

[0078] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A real-time drilling stuck drill risk assessment device, comprising a drill bit and a drill string, characterized in that: A collection component for collecting information is provided on the outside of the drill string; The collection component comprises an outer tube (1) and a controller. A combustible gas detector (6) is fixedly connected to the top of the outer tube (1). The controller is used to receive a combustible gas concentration signal transmitted by the combustible gas detector (6). A flexible tube (2) is slidably fitted on the inner wall of the outer tube (1). A plurality of strain sensors (5) are embedded and installed in the flexible tube (2) along its length direction. The controller is used to receive the strain signal transmitted by the strain sensor (5) and calculate the deformation amount of the flexible tube (2) based on the strain signal. The inner wall of the flexible tube (2) is fixedly connected to an inner tube (3), and the bottom of the inner tube (3) is circumferentially fixedly connected to a plurality of transversely retractable telescopic rods (7), and the controller is used to control the opening and closing of the telescopic rods (7); A plurality of slots for telescopic rods (7) to be telescopic are formed in the circumferential direction of the lower part of the outer wall of the drill string; The drill string is respectively fixedly connected with a rotation speed sensor and a temperature sensor, and the controller is used to receive the rotation speed signal and the temperature signal transmitted by the rotation speed sensor and the temperature sensor.

2. The real-time drilling stuck pipe risk assessment device according to claim 1, characterized in that: A plurality of support frames (4) are fixedly connected to the outer wall of the lower portion of the outer tube (1) along its circumference.

3. The real-time drilling stuck pipe risk assessment device according to claim 2, characterized in that: A waterproof camera (8) is fixedly connected to the inner wall of the inner tube (3), and the controller is used to receive image information collected by the waterproof camera (8).

4. The real-time drilling stuck pipe risk assessment device according to claim 3, characterized in that: The flexible pipe (2) is made of a polyethylene telescopic pipe.

5. The real-time drilling stuck pipe risk assessment device according to claim 4, characterized in that: The inner tube (3) is made of a stainless steel telescopic pipe.

6. The real-time drilling stuck pipe risk assessment device according to claim 5, characterized in that: A plurality of handrail frames (9) are fixedly connected to the outer wall of the upper portion of the outer tube (1) along its circumferential direction.

7. The real-time drilling stuck pipe risk assessment device according to claim 6, characterized in that: A fixing hole is formed at one end of the support frame (4) away from the outer tube (1), and a fixing nail is slidably fitted in the fixing hole.

8. A method for real-time drilling stuck pipe risk assessment, based on the real-time drilling stuck pipe risk assessment device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, device installation: put the assembled drill string and drill bit into the inner tube (3), start the telescopic rod (7), so that the output end of the telescopic rod (7) is engaged with the slot on the drill string; align the inner tube (3) with the wellhead, place the outer tube (1) vertically on the ground around the wellhead, and fix the support frame (4) with fixing nails; S2, data collection: start the drill bit and start drilling; use the combustible gas detector (6) to monitor the combustible gas concentration at the wellhead; use the strain sensor (5) to monitor the strain of the flexible pipe (2); use the waterproof camera (8) to monitor the image in the well in real time; use the speed sensor to monitor the drill bit speed in real time; Use temperature sensors to monitor drill bit temperature in real time; S3, risk assessment: set preset values ​​and preset curves for various data based on historical drilling data; compare the monitored data with the preset values ​​in real time, determine whether the data exceeds the preset values ​​in real time, and assess the risk level; Compare the change curve of each data with the preset curve, determine in real time whether the trend of the change curve is consistent with the preset curve trend, and assess the risk level; S4, device removal: retract the drill string and drill bit, shrink the inner tube (3) and the flexible tube (2), remove the fixing nails, and retract the device.

9. The real-time stuck pipe risk assessment method for drilling according to claim 8, characterized in that: In S3, the preset values ​​of various data refer to the maximum load values ​​of various data, including the preset value of the wellhead combustible gas concentration, the preset value of the drill bit temperature, the preset value of the drill bit speed and the preset value of the strain of the flexible pipe (2).

10. The real-time stuck pipe risk assessment method for drilling according to claim 9, characterized in that: In S3, the preset curves of various data include a preset curve of wellhead combustible gas concentration, a preset curve of drill bit temperature, a preset curve of drill bit rotation speed and a preset curve of the strain of the flexible pipe (2).

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