Casing drilling equipment control method, device, electronic equipment and drilling system

Abstract

The present invention provides a casing drilling equipment control method, device, electronic equipment and drilling system, which controls the drill bit to drill from the starting depth to the preset depth according to the preset drilling strategy, and controls the drill bit to perform back-marking on the oil well to obtain the back-marking time, wherein the starting depth is the depth of the casing shoe; controls the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time; controls the casing to be lowered in the oil well according to the back-marking time and the well-clearing time. The scheme of the present invention can solve the inefficiency problem caused by the reduction of the well diameter in static observation, shorten the casing drilling time, and improve the casing drilling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas exploitation, and in particular to a casing drilling equipment control method, device, electronic equipment and a drilling system. Background Art

[0002] During the drilling process of petroleum salt-gypsum layers, due to the characteristics of the salt-gypsum layer itself, the well wall of the formed oil wells will peel off, resulting in a reduction in the well diameter and affecting the drilling efficiency. Therefore, the use of casing drilling technology for cementing has become an important means to solve the problem.

[0003] The existing casing drilling technology uses a drill bit to drill into the salt-gypsum layer to form an oil well. After static observation of the changes in the wellbore diameter, the casing outside the drill bit is lowered to isolate the rock that has fallen off the well wall and complete cementing.

[0004] However, the existing technology requires repeated observation of the wellbore reduction and control of the drill bit to clear the well before lowering the casing, which consumes a lot of observation time and well clearing time, seriously affecting the casing drilling efficiency. Summary of the invention

[0005] The present invention provides a casing drilling equipment control method, device, electronic equipment and drilling system, which solve the low efficiency problem caused by the reduction of static observation well diameter and improve the casing drilling efficiency.

[0006] In a first aspect, an embodiment of the present invention provides a casing drilling equipment control method, the method being applied to a casing drilling equipment control device, the casing drilling equipment comprising a drill bit, a well-clearing device, a casing shoe, and a casing, and the rigidity of the well-clearing device is greater than the rigidity of the casing; the method comprising:

[0007] Controlling the drill bit to drill from a starting depth to a preset depth according to a preset drilling strategy, and controlling the drill bit to perform back-marking on the oil well to obtain a back-marking time, wherein the starting depth is the depth of the location of the casing shoe;

[0008] Controlling the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time;

[0009] The casing is controlled to be lowered into the oil well according to the back-reaming time and the well-clearing time.

[0010] In an optional embodiment, before controlling the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed, the method further includes:

[0011] The drill bit is lifted to the starting depth to control the well-drilling equipment to be lowered to the preset depth.

[0012] In an optional embodiment, the preset drilling strategy is a segmented drilling strategy;

[0013] Accordingly, the method of controlling the drill bit to drill from the starting depth to the preset depth according to the preset drilling strategy, and controlling the drill bit to perform back-marking processing on the oil well to obtain the back-marking time includes:

[0014] Setting a plurality of target depths within a preset depth range, wherein the preset depth range is a range from the starting depth to the preset depth;

[0015] Controlling the drill bit to perform segmented drilling according to the multiple target depths and the segmented drilling strategy, and controlling the drill bit to perform back-marking processing on the well section generated by each drilling to obtain the time spent on each back-marking;

[0016] The time taken for each back-marking operation is summed to obtain the back-marking time.

[0017] Further, controlling the drill bit to perform segmented drilling according to the multiple target depths and the segmented drilling strategy, and controlling the drill bit to perform back-marking processing on the well section generated by each drilling to obtain the time spent on each back-marking, includes:

[0018] Controlling the drill bit to drill from a starting depth to a target depth closest to the starting depth, and controlling the drill bit to perform back-marking processing on the well section generated by this drilling to obtain the time spent for the first back-marking;

[0019] The current target depth is used as the updated starting depth for the next drilling, and the steps of controlling the drill bit to drill from the updated starting depth to the target depth closest to the updated starting depth, and controlling the drill bit to perform back-marking on the well section generated by this drilling are repeated until the drill bit reaches the preset depth, so as to obtain the time spent on each back-marking.

[0020] In an optional embodiment, controlling the casing to be lowered in the oil well according to the back-marking time and the well-passing time includes:

[0021] Determining whether the well-clearing time is less than the back-reaming time;

[0022] If so, the casing is controlled to be lowered from the starting depth to the preset depth at the preset speed.

[0023] Furthermore, if the well-clearing time is greater than the back-marking time, the drill bit is controlled to perform diameter expansion processing on the oil well.

[0024] Furthermore, after controlling the drill bit to expand the oil well, the method further comprises:

[0025] Controlling the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time;

[0026] The step of controlling the casing to be lowered in the oil well according to the back-reaming time and the well-clearing time is performed.

[0027] In a second aspect, an embodiment of the present invention provides a casing drilling equipment control device, comprising:

[0028] A drill bit control unit, used to control the drill bit to drill from a starting depth to a preset depth according to a preset drilling strategy, and to control the drill bit to perform back-marking on the oil well to obtain a back-marking time, wherein the starting depth is the depth of the location of the casing shoe;

[0029] A well-clearing equipment control unit, used for controlling the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time;

[0030] The casing control unit is used to control the casing to be lowered in the oil well according to the back-marking time and the well-clearing time.

[0031] In an optional embodiment, the drill bit control unit is further used to lift the drill bit to the starting depth to control the well-clearing equipment to be lowered to the preset depth.

[0032] In an optional embodiment, the preset drilling strategy is a segmented drilling strategy;

[0033] The drill bit control unit is specifically used to set multiple target depths within a preset depth range, where the preset depth range is the range from the starting depth to the preset depth; control the drill bit to perform segmented drilling according to the multiple target depths and the segmented drilling strategy, and control the drill bit to perform back-marking processing on the well section generated by each drilling to obtain the time spent on back-marking each time; and sum the time spent on back-marking each time to obtain the back-marking time.

[0034] Furthermore, the drill bit control unit is specifically used to control the drill bit to drill from the starting depth to the target depth closest to the starting depth, and control the drill bit to back-mark the well section generated by this drilling to obtain the time spent for the first back-marking; use the current target depth as the updated starting depth for the next drilling, repeat the steps of controlling the drill bit to drill from the updated starting depth to the target depth closest to the updated starting depth, and control the drill bit to back-mark the well section generated by this drilling, until the drill bit reaches the preset depth, to obtain the time spent for each back-marking.

[0035] In an optional embodiment, the casing control unit is specifically used to determine whether the well-clearing time is less than the back-marking time; if so, control the casing to be lowered from the starting depth to the preset depth at the preset speed.

[0036] Furthermore, the drill bit control unit is also used to control the drill bit to expand the diameter of the oil well if the well-clearing time is greater than the back-marking time.

[0037] Furthermore, after the drill bit control unit controls the drill bit to expand the oil well, the well clearing equipment control unit is further used to control the well clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well clearing time;

[0038] The casing control unit is also used to control the step of lowering the casing in the oil well according to the back-marking time and the well-clearing time.

[0039] In a third aspect, an embodiment of the present invention provides an electronic device, including:

[0040] Memory, processor and computer program;

[0041] The computer program is stored in the memory and is configured to be executed by the processor to implement the method described in any one of the first aspects.

[0042] In a fourth aspect, an embodiment of the present invention provides a drilling system, including: a casing drilling equipment control device, a drill bit, a well-clearing device, a casing shoe, and a casing;

[0043] The casing drilling equipment control device is used to control the drill bit, well-clearing equipment and casing according to the method described in any one of the first aspects.

[0044] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the method described in any one of the first aspects.

[0045] The present invention provides a casing drilling equipment control method, device, electronic equipment and drilling system, which controls the drill bit to drill from the starting depth to the preset depth according to the preset drilling strategy, and controls the drill bit to perform back-marking on the oil well to obtain the back-marking time, wherein the starting depth is the depth of the casing shoe; controls the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time; controls the casing to be lowered in the oil well according to the back-marking time and the well-clearing time. Compared with the prior art, the scheme provided by the present invention can ensure that the well section is unobstructed to the maximum extent before controlling the casing to be lowered in the oil well, and accurately determine the degree of patency of the well section, and then after determining that the casing is lowered in the oil well according to the back-marking time and the well-clearing time, avoid the casing from encountering the problem of stuck drill during the lowering process, shorten the casing drilling time as much as possible, improve the casing drilling efficiency, and solve the low efficiency problem caused by the reduction of the static observation well diameter.

[0046] It should be understood that the contents described in the above summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0048] Figure 1 A schematic diagram of a scenario architecture on which the present disclosure is based;

[0049] Figure 2 A flow chart of a casing drilling equipment control method provided by an embodiment of the present disclosure;

[0050] Figure 3 A flow chart of another casing drilling equipment control method provided by an embodiment of the present disclosure;

[0051] Figure 4 A schematic diagram of the structure of a casing drilling equipment control device provided by an embodiment of the present disclosure;

[0052] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure;

[0053] Figure 6 A schematic structural diagram of a drilling system provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0054] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0055] During the drilling process in salt-gypsum layers, due to the complex physical properties of the salt-gypsum layers, well wall collapse, peeling, and block falling often occur, which reduces the well diameter and leads to drill sticking problems. In order to solve the drilling sticking problem, casing drilling technology came into being.

[0056] The existing casing drilling technology uses a drill bit to drill into the salt-gypsum layer to a predetermined depth, lifts the drill bit into the casing shoe, observes the change in the wellbore diameter according to a preset time, and then uses the drill bit to clear the well section to determine whether the well section is unobstructed. If the well section is unobstructed, the casing is lowered to a predetermined depth. Otherwise, the drill bit is used to expand the well section until the well section is unobstructed and the casing is lowered to a predetermined depth.

[0057] However, in the prior art, after using a drill bit to drill into the salt-gypsum layer to form an oil well, it is necessary to stop drilling, repeatedly observe the reduction of the well diameter, and use the drill bit to clear the oil well to determine the reduction of the well diameter, and then place the casing according to the reduction of the well diameter. The whole process consumes a lot of observation time and well clearing time, which seriously affects the efficiency of casing drilling.

[0058] In response to these problems, the inventors have found that after the drill bit is controlled to drill into a well section, the well diameter is reduced due to the collapse, peeling and falling of the well wall. The drill bit can be controlled to perform back-marking treatment on the well section to clean the well wall. A well-clearing device with a stiffness greater than that of the casing is used to perform well-clearing treatment on the well section to simulate the operation of lowering the casing. The degree of patency of the well section is determined according to the well-clearing time, and the casing is controlled to be lowered according to the normal degree of the well section. Therefore, the casing drilling equipment control method provided by the scheme of the present invention can ensure that the well section is patency to the greatest extent before the casing is controlled to be lowered in the oil well, and accurately determine the degree of patency of the well section. Then, after determining that the casing is lowered in the oil well according to the back-marking time and the well-clearing time, the casing is prevented from encountering the problem of stuck drill during the lowering process, and the casing drilling time is shortened as much as possible, and the casing drilling efficiency is improved, which solves the problem of low efficiency caused by the reduction of the well diameter in static observation.

[0059] Figure 1 A schematic diagram of a scenario architecture based on which the present disclosure is based is shown in FIG. Figure 1As shown, a network architecture based on which the present disclosure is based may include a casing drilling equipment control device 1 , a casing drilling equipment 2 , and a drilling system 3 .

[0060] The casing drilling equipment control device 1 may be hardware, software or a combination of software and hardware, and may be used to execute the casing drilling equipment control method described in the following embodiments.

[0061] When the casing drilling equipment control device 1 is hardware, it can be an electronic device with computing functions. When the casing drilling equipment control device 1 is software, it can be installed in an electronic device with computing functions. The electronic device includes but is not limited to a server, a desktop computer, and a control panel.

[0062] The casing drilling equipment 2 is a collection of equipment capable of performing underground drilling, including a drill bit, well-drilling equipment, casing shoes, and casing, etc., and no special restrictions are made here.

[0063] The drilling system 3 is a collection of all equipment capable of executing casing drilling, including a casing drilling equipment control device 1 , casing drilling equipment 2 , and mechanical structures and electronic components connecting the casing drilling equipment control device 1 and the casing drilling equipment 2 .

[0064] Specifically, the casing drilling equipment control device 1 can be connected to the casing drilling equipment 2 for communication, and the casing drilling equipment control instructions are sent to the casing drilling equipment 2. The casing drilling equipment 2 controls the corresponding equipment to perform drilling operations according to the received instructions to form an oil well that can meet the oil and gas production conditions.

[0065] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0066] Embodiment 1

[0067] Figure 2 A flow chart of a casing drilling equipment control method provided by an embodiment of the present disclosure, wherein the method is applied to a casing drilling equipment control device, wherein the casing drilling equipment comprises a drill bit, a well-clearing device, a casing shoe, and a casing, and the rigidity of the well-clearing device is greater than the rigidity of the casing, such as Figure 2 As shown, the execution subject of this embodiment is a casing drilling equipment control device. The embodiment of the present disclosure provides a casing drilling equipment control method, including:

[0068] S21. According to a preset drilling strategy, the drill bit is controlled to drill from a starting depth to a preset depth, and the drill bit is controlled to perform back-marking on the oil well to obtain a back-marking time, wherein the starting depth is the depth of the location of the casing shoe.

[0069] Among them, the preset depth is the target oil well depth determined according to the oil and gas production needs, and the casing shoe is a steel short section set at the lowest end of the casing to facilitate the lowering of the casing and strengthen the bottom of the casing.

[0070] In this embodiment, when the drill bit is controlled to drill according to a preset drilling strategy, the preset drilling strategy may be a segmented drilling strategy, in which multiple target depths are set within the range of the starting depth and the preset depth, and the drill bit is controlled to drill to the target depth from top to bottom in sequence, and the drill bit is controlled to perform back-marking on each new well section to clean the well wall and obtain the back-marking time, or the drill bit is controlled to drill directly from the starting depth to the preset depth, and the drill bit is controlled to perform back-marking on the entire well section to clean the well wall and obtain the back-marking time, which is not limited in this embodiment.

[0071] It should be noted that back-marking refers to the process of controlling the drill bit to clean the rock and sand peeling off the well wall from bottom to top.

[0072] S22, controlling the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time.

[0073] Due to the shrinkage of the wellbore diameter caused by well wall collapse, peeling and block falling, directly controlling the casing for lowering may cause jamming problems. Therefore, the well clearing equipment is controlled to be lowered from the starting depth to the preset depth at a preset speed to simulate the casing lowering process, clear the oil well and obtain the well clearing time.

[0074] Among them, the well-clearing equipment is a tubular equipment with the same inner diameter as the casing and greater rigidity than the casing.

[0075] In this embodiment, a well-clearing device with a stiffness greater than that of the casing is used because the greater the stiffness, the greater the resistance encountered when it is lowered into the oil well. If the well-clearing device can be lowered to a preset depth, the casing can also be lowered to a preset depth and the time required is shorter. The preset speed for controlling the lowering of the well-clearing device is the same as the speed for controlling the drill bit to perform back-marking. However, due to the different inner diameters at different positions of the well section, the well-clearing device and the drill bit are encountered with different resistances, which will cause the speed to change and thus affect the time. Therefore, the degree of patency of the well section can be determined by comparing the back-marking time and the well-clearing time, thereby controlling the lowering of the casing.

[0076] S23, controlling the casing to be lowered into the oil well according to the back-reaming time and the well-clearing time.

[0077] In this embodiment, the relationship between the back-marking time and the well-clearing time is determined. The relationship between the back-marking time and the well-clearing time reflects the patency of the well section after the back-marking. The casing is lowered according to the patency of the well section.

[0078] The present embodiment provides a casing drilling equipment control method, which controls the drill bit to drill from the starting depth to the preset depth according to a preset drilling strategy, and controls the drill bit to perform back-marking on the oil well to obtain the back-marking time, wherein the starting depth is the depth of the casing shoe; controls the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time; controls the casing to be lowered in the oil well according to the back-marking time and the well-clearing time. The casing drilling equipment control method provided in the present embodiment can ensure that the well section is unobstructed to the greatest extent before controlling the casing to be lowered in the oil well, and accurately determine the degree of patency of the well section, and then after determining that the casing is lowered in the oil well according to the back-marking time and the well-clearing time, avoids the problem of drill sticking during the lowering process of the casing, shortens the casing drilling time as much as possible, improves the casing drilling efficiency, and solves the inefficiency problem caused by the reduction of the well diameter in static observation.

[0079] Embodiment 2

[0080] Figure 3 A flowchart of another casing drilling equipment control method provided by an embodiment of the present disclosure, such as Figure 3 As shown, the execution subject of this embodiment is a casing drilling equipment control device. In order to better control the lowering of the well-clearing equipment in the oil well, the casing drilling equipment control method provided by the embodiment of the present disclosure further includes before S22:

[0081] S24, lifting the drill bit to the starting depth.

[0082] The starting depth is the depth of the casing shoe.

[0083] In this embodiment, after the drill bit is lifted to the starting depth, the drill bit can be replaced and the oil well can be cleared using a well-clearing device to reduce interference of the drill bit with the well-clearing device.

[0084] Embodiment 3

[0085] The execution subject of this embodiment is a casing drilling equipment control device. The casing drilling equipment control method provided in the embodiment of the present disclosure is a further description of step S21 in the first embodiment. In this embodiment, the preset drilling strategy is a segmented drilling strategy. Accordingly, S21 includes:

[0086] S211. Setting a plurality of target depths within a preset depth range, where the preset depth range is a range from the starting depth to the preset depth.

[0087] In this embodiment, the purpose of setting multiple target depths is to perform segmented drilling. The segmented drilling can be performed in segments and back-marking can ensure the smoothness of the newly generated well section and avoid serious shrinkage problems in the early generated well sections.

[0088] Example 1: the initial depth is 1000m, the preset depth is 2500m, the preset depth range is 1000m-2500m, and two target depths are set, namely 1500m and 2000m.

[0089] S212, controlling the drill bit to perform segmented drilling according to the multiple target depths and the segmented drilling strategy, and controlling the drill bit to perform back-marking processing on the well section generated by each drilling to obtain the time spent for each back-marking.

[0090] In this embodiment, the drill bit is controlled to drill from the starting depth to the target depth closest to the starting depth, and the drill bit is controlled to perform back-marking on the well section generated by this drilling to obtain the time spent on the first back-marking; the current target depth is used as the updated starting depth for the next drilling, and the steps of controlling the drill bit to drill from the updated starting depth to the target depth closest to the updated starting depth, and controlling the drill bit to perform back-marking on the well section generated by this drilling are repeated until the drill bit reaches the preset depth to obtain the time spent on each back-marking.

[0091] Example 2. Based on the above Example 1, in the first drilling, the drill bit is controlled to drill from a depth of 1000m to a depth of 1500m, and the well section from a depth of 1000m to a depth of 1500m is back-marked to clean the rock and mud peeled off from the well wall. The first back-marking time is 10h. The depth of 1500m is used as the starting depth of the second drilling. In the second drilling, the drill bit is drilled from a depth of 1500m to a depth of 2000m and back-marked. The second back-marking time is 15h. The depth of 2000m is used as the starting depth of the third drilling. In the third drilling, the drill bit is drilled from a depth of 2000m to a depth of 2500m and back-marked. The third back-marking time is 22h.

[0092] S213, summing up the time spent on each back-marking operation to obtain the back-marking time.

[0093] In this embodiment, the sum of the time spent on each back-marking is calculated to obtain the back-marking time, which is used to determine the degree of patency of the well section.

[0094] Example 3, based on the above-mentioned Examples 1 and 2, the first back-marking time was 10 hours, the second back-marking time was 15 hours, and the third back-marking time was 22 hours. The sum of the back-marking time was 47 hours. The segmented back-marking treatment can avoid the serious shrinkage problem caused by a large amount of rock peeling in the early drilling section due to long-term non-treatment.

[0095] Embodiment 4

[0096] The execution subject of this embodiment is a casing drilling equipment control device. The casing drilling equipment control method provided in this embodiment is a further description of step S23 in embodiment 1. S23 includes:

[0097] S231, judging whether the well-opening time is less than the back-reaming time.

[0098] S232: If yes, control the casing to be lowered from the starting depth to the preset depth at the preset speed.

[0099] The preset speed for controlling the lowering of the casing is as close as possible to the preset speed for controlling the lowering of the well-clearing equipment, so as to ensure that the casing lowering time is less than the well-clearing time.

[0100] In this embodiment, the well clearing time is less than the back-marking time, which means that the well clearing equipment does not encounter a drill sticking problem during the well clearing process and can be smoothly lowered into the oil well to a preset depth. Since the stiffness of the well clearing equipment is greater than the stiffness of the casing, it can be inferred that the casing can be controlled to be lowered at a preset speed and can be lowered to the preset depth in a time less than the well clearing time.

[0101] Example 4: Based on the above-mentioned Examples 1, 2 and 3, the back-marking time and well-clearing time are 47h and 45h respectively. Since the well-clearing time 45h is less than the back-marking time 47h, the casing is controlled to be lowered from the starting depth to the preset depth at a preset speed.

[0102] During the back-marking process, the wellbore may still collapse, peel off, or drop blocks, which may cause the well-drilling equipment to encounter a drill sticking problem. Therefore, the casing drilling equipment control method also includes:

[0103] S233: If the well-opening time is greater than the back-marking time, control the drill bit to expand the diameter of the oil well.

[0104] In this embodiment, the well clearing time is greater than the back-marking time, which indicates that a drill bit is stuck during the well clearing process, so that the drill cannot be smoothly lowered to the preset depth in the oil well. Therefore, it is necessary to control the drill bit to expand the oil well to solve the drill bit problem.

[0105] S234, controlling the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time.

[0106] S235, executing the step of controlling the casing to be lowered into the oil well according to the back-reaming time and the well-clearing time.

[0107] In this embodiment, after the oil well is expanded, the well clearing equipment is controlled to be lowered from the starting depth to the preset depth to obtain the well clearing time, and it is determined whether the well clearing time is less than the back-marking time. The casing is controlled to be lowered into the oil well according to the determination result.

[0108] Example 4. Based on the above-mentioned Examples 1, 2 and 3, the back-marking time and well clearing time are obtained as 47h and 49h respectively. Since the well clearing time 49h is greater than the back-marking time 47h, the drill bit is controlled to expand the diameter of the oil well. After the diameter expansion, the well clearing equipment is controlled again to be lowered from the starting depth to the preset depth at a preset speed, and the well clearing time is 43h. Since the well clearing time 43h is less than the back-marking time 47h, the casing is controlled to be lowered from the starting depth to the preset depth at a preset speed.

[0109] Corresponding to the casing drilling equipment control method of the above embodiment, Figure 4 The following is a schematic diagram of the structure of a casing drilling equipment control device provided by an embodiment of the present disclosure. For ease of explanation, only the parts related to the embodiment of the present disclosure are shown. Figure 4 As shown, the casing drilling equipment control device of this embodiment includes:

[0110] A drill bit control unit 41 is used to control the drill bit to drill from a starting depth to a preset depth according to a preset drilling strategy, and to control the drill bit to perform back-marking processing on the oil well to obtain a back-marking time, wherein the starting depth is the depth of the location of the casing shoe;

[0111] A well-clearing equipment control unit 42 is used to control the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time;

[0112] The casing control unit 43 is used to control the lowering of the casing in the oil well according to the back-marking time and the well-clearing time.

[0113] In an optional embodiment, the drill bit control unit 41 is further used to lift the drill bit to the starting depth to control the well-clearing equipment to be lowered to the preset depth.

[0114] In an optional embodiment, the preset drilling strategy is a segmented drilling strategy;

[0115] The drill bit control unit 41 is specifically used to set multiple target depths within a preset depth range, where the preset depth range is the range from the starting depth to the preset depth; control the drill bit to perform segmented drilling according to the multiple target depths and the segmented drilling strategy, and control the drill bit to perform back-marking processing on the well section generated by each drilling to obtain the time spent for each back-marking; and sum the time spent for each back-marking to obtain the back-marking time.

[0116] Furthermore, the drill bit control unit 41 is specifically used to control the drill bit to drill from the starting depth to the target depth closest to the starting depth, and control the drill bit to back-mark the well section generated by this drilling to obtain the time spent for the first back-marking; use the current target depth as the updated starting depth for the next drilling, repeat the steps of controlling the drill bit to drill from the updated starting depth to the target depth closest to the updated starting depth, and control the drill bit to back-mark the well section generated by this drilling, until the drill bit reaches the preset depth, to obtain the time spent for each back-marking.

[0117] In an optional embodiment, the casing control unit 43 is specifically used to determine whether the well-clearing time is less than the back-marking time; if so, control the casing to be lowered from the starting depth to the preset depth at the preset speed.

[0118] Furthermore, the drill bit control unit 41 is also used to control the drill bit to expand the diameter of the oil well if the well-clearing time is greater than the back-marking time.

[0119] Further, after the drill bit control unit 41 controls the drill bit to expand the oil well, the well-clearing equipment control unit 42 is further used to control the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time;

[0120] The casing control unit 43 is further used to control the step of lowering the casing in the oil well according to the back-marking time and the well-passing time.

[0121] The device of this embodiment can be used to execute the technical solution of the above method embodiment. Its implementation principle is similar and will not be repeated here.

[0122] The disclosed embodiment provides a casing drilling equipment control device, wherein the drill bit control unit controls the drill bit to drill from the starting depth to the preset depth according to the preset drilling strategy, and controls the drill bit to perform back-marking on the oil well to obtain the back-marking time; the well-clearing equipment control unit controls the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time; the casing control unit controls the casing to be lowered in the oil well according to the back-marking time and the well-clearing time. The casing drilling equipment control device provided in this embodiment can ensure that the well section is unobstructed to the greatest extent before controlling the casing to be lowered in the oil well, and accurately determine the degree of patency of the well section, and then after determining that the casing is lowered in the oil well according to the back-marking time and the well-clearing time, it can avoid the casing from encountering the problem of drill sticking during the lowering process, shorten the casing drilling time as much as possible, improve the casing drilling efficiency, and solve the low efficiency problem caused by the reduction of the well diameter in static observation.

[0123] Figure 5 A schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure is shown in FIG. Figure 5 As shown, the electronic device 50 of this embodiment may include: a memory 51 and a processor 52.

[0124] A memory 51 is used to store computer programs (such as application programs and function modules for implementing the above-mentioned casing drilling equipment control method), computer instructions, etc.;

[0125] The above-mentioned computer programs, computer instructions, etc. may be stored in partitions in one or more memories 51 . And the above-mentioned computer programs, computer instructions, data, etc. may be called by the processor 52 .

[0126] The processor 52 is used to execute the computer program stored in the memory 51 to implement the various steps in the method involved in the above embodiment.

[0127] For details, please refer to the relevant description in the previous method embodiment.

[0128] The memory 51 and the processor 52 may be independent structures or integrated structures. When the memory 51 and the processor 52 are independent structures, the memory 51 and the processor 52 may be coupled and connected via a bus 53 .

[0129] An electronic device of this embodiment can execute the technical solution in the aforementioned method embodiment. Its specific implementation process and technical principles refer to the relevant description in the aforementioned method embodiment, which will not be repeated here.

[0130] Figure 6 A structural diagram of a drilling system provided in an embodiment of the present disclosure is shown in FIG. Figure 6 As shown, the drilling system 60 provided in this embodiment includes: a casing drilling equipment control device 61, a drill bit 62, a well-clearing device 63, a casing shoe 64 and a casing 65;

[0131] The casing drilling equipment control device 60 is used to control the drill bit 62 , the well-clearing equipment 63 and the casing 65 according to the casing drilling equipment control method described in the above-mentioned embodiment.

[0132] In this embodiment, first, the casing drilling equipment control device 61 controls the drill bit 62 to drill from the starting depth to the preset depth according to the preset drilling strategy, and controls the drill bit to perform back-marking on the oil well to obtain the back-marking time; then the casing drilling equipment control device 61 controls the well clearing equipment 63 to be lowered from the starting depth to the preset depth at a preset speed to obtain the well clearing time; finally, the casing drilling equipment control device 65 controls the casing to be lowered into the oil well according to the back-marking time and the well clearing time.

[0133] The disclosed embodiment provides a drilling system, which controls the drilling of the drill bit according to a preset drilling strategy and controls the drill bit to perform back-marking on the oil well to obtain the back-marking time; controls the well clearing equipment to clear the well to obtain the well clearing time; and controls the casing to be lowered into the oil well according to the back-marking time and the well clearing time, thereby solving the problem of low efficiency caused by the reduction of the well diameter during static observation, shortening the casing drilling time, and improving the casing drilling efficiency.

[0134] In addition, an embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When at least one processor of a user device executes the computer-executable instructions, the user device executes the above-mentioned various possible methods.

[0135] Among them, computer-readable media include computer storage media and communication media, wherein the communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general or special-purpose computer. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a user device. Of course, the processor and the storage medium can also be present in a communication device as discrete components.

[0136] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casing drilling equipment control method, characterized in that: The method is applied to a casing drilling equipment control device, wherein the casing drilling equipment comprises a drill bit, a well-clearing device, a casing shoe and a casing, and the rigidity of the well-clearing device is greater than the rigidity of the casing; the method comprises: Controlling the drill bit to drill from a starting depth to a preset depth according to a preset drilling strategy, and controlling the drill bit to perform back-marking on the oil well to obtain a back-marking time, wherein the starting depth is the depth of the location of the casing shoe; Controlling the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time; According to the back-reaming time and the well-clearing time, the casing is controlled to be lowered in the oil well; Before controlling the well-draining equipment to be lowered from the starting depth to the preset depth at a preset speed, the method further includes: Lifting the drill bit to the starting depth to control the well-drilling equipment to be lowered to the preset depth; The preset drilling strategy is a segmented drilling strategy; Accordingly, the method of controlling the drill bit to drill from the starting depth to the preset depth according to the preset drilling strategy, and controlling the drill bit to perform back-marking processing on the oil well to obtain the back-marking time includes: Setting a plurality of target depths within a preset depth range, wherein the preset depth range is a range from the starting depth to the preset depth; Controlling the drill bit to perform segmented drilling according to the multiple target depths and the segmented drilling strategy, and controlling the drill bit to perform back-marking processing on the well section generated by each drilling to obtain the time spent on each back-marking; The time taken for each back-marking operation is summed to obtain the back-marking time.

2. The method according to claim 1, characterized in that The step of controlling the drill bit to perform segmented drilling according to the multiple target depths and the segmented drilling strategy, and controlling the drill bit to perform back-marking processing on the well section generated by each drilling to obtain the time spent on each back-marking, includes: Controlling the drill bit to drill from a starting depth to a target depth closest to the starting depth, and controlling the drill bit to perform back-marking processing on the well section generated by this drilling to obtain the time spent for the first back-marking; The current target depth is used as the updated starting depth for the next drilling, and the steps of controlling the drill bit to drill from the updated starting depth to the target depth closest to the updated starting depth, and controlling the drill bit to perform back-marking on the well section generated by this drilling are repeated until the drill bit reaches the preset depth, so as to obtain the time spent on each back-marking.

3. The method according to claim 1, characterized in that The step of controlling the casing to be lowered into the oil well according to the back-reaming time and the well-passing time comprises: Determining whether the well-clearing time is less than the back-reaming time; If so, the casing is controlled to be lowered from the starting depth to the preset depth at the preset speed.

4. The method according to claim 3, characterized in that: If the well-opening time is greater than the back-reaming time, the drill bit is controlled to perform diameter expansion processing on the oil well.

5. The method according to claim 4, characterized in that After controlling the drill bit to expand the oil well, the method further includes: Controlling the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time; The step of controlling the casing to be lowered in the oil well according to the back-reaming time and the well-clearing time is performed.

6. A casing drilling equipment control device, characterized in that: include: A drill bit control unit, used to control the drill bit to drill from a starting depth to a preset depth according to a preset drilling strategy, and to control the drill bit to perform back-marking on the oil well to obtain a back-marking time, wherein the starting depth is the depth of the location of the casing shoe; A well-clearing equipment control unit, used for controlling the well-clearing equipment to be lowered from the starting depth to the preset depth at a preset speed to obtain the well-clearing time; A casing control unit, used for controlling the casing to be lowered into the oil well according to the back-marking time and the well-passing time; Before controlling the well-drilling equipment to be lowered from the starting depth to the preset depth at a preset speed, the drill bit control unit is further used to: Lifting the drill bit to the starting depth to control the well-drilling equipment to be lowered to the preset depth; The preset drilling strategy is a segmented drilling strategy; Accordingly, the drill bit is controlled to drill from the starting depth to the preset depth according to the preset drilling strategy, and the drill bit is controlled to perform back-marking processing on the oil well to obtain the back-marking time. The drill bit control unit is also used for: Setting a plurality of target depths within a preset depth range, wherein the preset depth range is a range from the starting depth to the preset depth; Controlling the drill bit to perform segmented drilling according to the multiple target depths and the segmented drilling strategy, and controlling the drill bit to perform back-marking processing on the well section generated by each drilling to obtain the time spent on each back-marking; The time taken for each back-marking operation is summed to obtain the back-marking time.

7. An electronic device, characterized in that: include: at least one processor and memory; The memory stores computer-executable instructions; The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the method according to any one of claims 1 to 5.

8. A drilling system, characterized in that: include: Casing drilling equipment control devices, drill bits, well-drilling equipment, casing shoes and casing; Wherein, the casing drilling equipment control device is used to perform control of the drill bit, well-clearing equipment and casing according to the method described in any one of claims 1 to 5.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the processor executes the computer-executable instructions, the method according to any one of claims 1 to 5 is implemented.

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