Variable core storage barrel for oil well coring

Abstract

The utility model relates to the field of oil exploration, in particular to a variable core storage barrel for oil well coring, which comprises a shell, a sampling component arranged in the shell, and a side pushing component arranged on one side of the sampling component. The collecting mechanism is used for storing the sample rock cores with different diameters; and the separating mechanism is used for separating the plurality of sample rock cores in the collecting mechanism. Through the mutual cooperation of the fixed core storage cylinder and the movable core storage cylinder, sample rock cores with different sizes and diameters can be conveniently stored, and meanwhile, through the mutual cooperation of a first elastic tongue and a second elastic tongue, the sample rock cores with different sizes can be clamped and fixed, and an inductive probe can conveniently sense and record the number of the entered rock cores; the pushing hydraulic rod is used for pushing the chain to guide the partition pieces in the partition piece storage barrel into the fixed core storage barrel or the movable core storage barrel through the two guide frames, and then two adjacent rock cores are separated.

Description

Technical Field

[0001] The utility model relates to the field of petroleum exploration, in particular to a variable core storage barrel for coring in oil wells. Background Art

[0002] When drilling an oil well, it is necessary to drill holes in its sidewalls and take out the cores. The oil content of the well is determined based on the cores. Due to the depth of the oil well, the texture of the rock formations on the sidewalls of the wells is different. If a harder rock formation is drilled, a larger diameter sidewall sampling device is prone to getting stuck or being unable to drill, which may also cause a failure of the sampling device. Therefore, it is necessary to replace the sampling device with a smaller diameter to drill it. However, when the same sampling tube wants to complete coring tasks with different diameters, it is often necessary to replace many parts, which is time-consuming and labor-intensive. Utility Model Content

[0003] The purpose of the utility model is to provide a variable core storage barrel for coring in oil wells in order to solve the above problems.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A variable core storage barrel for oil well coring, comprising a housing, a sampling assembly disposed inside the housing, a side thrust assembly disposed on one side of the sampling assembly, a collection mechanism for storing sample cores of different diameters, and a separation mechanism for separating multiple sample cores within the collection mechanism;

[0006] The collecting mechanism includes a fixed core storage barrel, a movable core storage barrel is provided inside the fixed core storage barrel, a spacer introduction groove is provided at the lower side of one end of each of the fixed core storage barrel and the movable core storage barrel along the radial direction of the two, a second spring tongue is hingedly connected to the spring tongue of the movable core storage barrel in the spring tongue entry groove, a spring tongue positioning frame is provided at the rear side of the fixed core storage barrel, a first spring tongue is hingedly connected to the spring tongue positioning frame, and a sensing probe for sensing the passage of the sample core is provided on one side of the spring tongue positioning frame, and the fixed core storage barrel and the movable core storage barrel are connected by two symmetrically arranged fixing screws;

[0007] The partitioning mechanism includes a spacer storage cylinder, which is located below the fixed core storage cylinder. Two mutually interlocked guide frames are provided on the lower side of the spacer storage cylinder. A chain is slidably connected inside the guide frame. A push hydraulic rod for pushing the chain to move is fixed at the other end of the two guide frames. An L-shaped slide groove for chain movement is provided between the two guide frames, and the upper end of the L-shaped slide groove corresponds to the spacer introduction groove of the fixed core storage cylinder and the movable core storage cylinder. The two guide frames are provided with a slot connected to the spacer storage cylinder near the spacer introduction slot, and the slot is connected to the L-shaped slide groove.

[0008] Preferably, one end of the fixed core storage barrel and the movable core storage barrel are both provided with a spring tongue spring-in groove arranged along the axial direction of the two.

[0009] Preferably, one end of the first elastic tongue extending into the elastic tongue elastic groove on the fixed core storage tube is in contact with the rear side of the second elastic tongue.

[0010] Preferably, a spring for pushing the rear side of the first spring tongue is provided inside the spring tongue positioning frame, and a magnetic block is provided on a side of the first spring tongue close to the sensing probe.

[0011] Preferably, an oil supply seat is fixed to the other end of the spacer storage cylinder, and an oil hole for supplying oil to the interior of the spacer storage cylinder is opened at the other end of the oil supply seat.

[0012] Preferably, an oil guide seat is provided on the upper side of the other end of the fixed core storage barrel, and the oil guide seat is connected with the oil hole of the oil supply seat through an oil pipe.

[0013] The beneficial effects compared with the prior art are as follows:

[0014] 1. The fixed core storage tube and the movable core storage tube cooperate with each other to facilitate the storage of sample cores of different diameters. At the same time, the first spring tongue and the second spring tongue cooperate with each other to lock the sample cores of different sizes and facilitate the induction probe to sense and record the number of cores entering.

[0015] 2. Use the push hydraulic rod to push the chain to guide the separator in the separator storage tube into the fixed core storage tube or the movable core storage tube through the two guide frames, and then separate the two adjacent cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural schematic diagram of a variable core storage barrel for oil well coring according to the utility model;

[0018] Figure 2 This is a schematic structural diagram of a sampling assembly of a variable core storage barrel for oil well coring according to the utility model;

[0019] Figure 3 This is a partial cross-sectional view of the partition mechanism of a variable core storage barrel for oil well coring according to the present invention;

[0020] Figure 4 This is a partial cross-sectional view of the collection mechanism of a variable core storage barrel for oil well coring according to the utility model;

[0021] Figure 5 This is a partial parts diagram of the separation mechanism of a variable core storage barrel for oil well coring described in the utility model;

[0022] Figure 6 This is a partial parts diagram of the chain of a variable core storage barrel for oil well coring described in the utility model;

[0023] Figure 7 This is a schematic structural diagram of a spacer introduction groove of a fixed core storage barrel of a variable core storage barrel for oil well coring according to the utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the spring tongue of the movable core storage tube of the variable core storage tube for oil well coring described in the utility model;

[0025] Figure 9 This is a diagram showing the coordination between the fixed core storage barrel and the first spring tongue of a variable core storage barrel for coring oil wells described in the utility model;

[0026] Figure 10 This is a diagram showing the cooperation between the movable core storage tube and the first spring tongue of a variable core storage tube for coring in an oil well according to the present invention;

[0027] Figure 11 This is a partial parts diagram of a guide frame of a variable core storage barrel for oil well coring described in the utility model;

[0028] Figure 12 This is a diagram showing the coordination of the first spring tongue and the second spring tongue of a variable core storage barrel for coring in an oil well according to the utility model.

[0029] The following are the descriptions of the reference numerals:

[0030] 1. Side thrust assembly; 2. Sampling assembly; 3. Collecting mechanism; 4. Separating mechanism; 5. Casing; 21. Hydraulic motor; 22. Drill bit; 31. Fixed core storage barrel; 32. Movable core storage barrel; 33. First spring tongue; 34. Second spring tongue; 35. Spring tongue positioning frame; 36. Induction probe; 37. Fixing screw; 38. Spacer introduction groove; 39. Spring tongue spring-in groove; 41. Push hydraulic rod; 42. Chain; 43. Guide frame; 44. Spacer storage barrel; 45. Oil supply seat; 46. Oil guide seat. DETAILED DESCRIPTION

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] like Figures 1-12 As shown, a variable core storage barrel for oil well coring includes an outer shell 5, a sampling assembly 2 is provided inside the outer shell 5, a side thrust assembly 1 is provided on one side of the sampling assembly 2, and also includes a collection mechanism 3 for storing sample cores of different diameters and a separation mechanism 4 for separating multiple sample cores inside the collection mechanism 3.

[0034] In this embodiment, the collecting mechanism 3 includes a fixed core barrel 31, a movable core barrel 32 is provided inside the fixed core barrel 31, and a spacer introduction groove 38 is provided at the lower side of one end of the fixed core barrel 31 and the movable core barrel 32 along the radial direction of the two. A second spring tongue 34 is hinged in the spring tongue spring-in groove 39 of the movable core barrel 32, and a spring tongue positioning frame 35 is provided at the rear side of the fixed core barrel 31. A first spring tongue 33 is hinged in the spring tongue positioning frame 35, and a sensing probe 36 for sensing the passage of the sample core is provided on one side of the spring tongue positioning frame 35. The fixed core barrel 31 and the movable core barrel 32 are connected by two symmetrically arranged fixing screws 37. One end of the fixed core barrel 31 and the movable core barrel 32 are provided along the two ends. The spring tongue 39 is axially arranged, and the first spring tongue 33 extends into the spring tongue spring groove 39 on the fixed core storage barrel 31, and one end of the first spring tongue 33 is fitted with the rear side of the second spring tongue 34. The spring tongue positioning frame 35 is provided with a spring for pushing the rear side of the first spring tongue 33, and the first spring tongue 33 is provided with a magnetic block on the side close to the sensing probe 36. When it is necessary to store small diameter sample cores, the movable core storage barrel 32 is inserted into the fixed core storage barrel 31, and the second spring tongue 34 and the first spring tongue 33 are engaged with each other. At the same time, the position of the movable core storage barrel 32 in the fixed core storage barrel 31 is fixed by two fixing screws 37. Then, when the small diameter sample core enters the movable core storage barrel 32, the small diameter sample core will move The outer side of the movable core storage barrel 32 pushes the second elastic tongue 34. At this time, the second elastic tongue 34 synchronously pushes the first elastic tongue 33 to move in the direction of the elastic tongue elastic slot 39 away from the fixed core storage barrel 31. At this time, the magnetic block on the first elastic tongue 33 will be sensed and recorded by the induction probe 36. As the small-diameter sample core passes through the second elastic tongue 34, the spring in the elastic tongue positioning frame 35 pushes the first elastic tongue 33 to re-extend into the elastic tongue elastic slot 39 of the fixed core storage barrel 31. At the same time, the second elastic tongue 34 will also follow the first elastic tongue 33 and synchronously extend into the interior of the movable core storage barrel 32. At this time, the second elastic tongue 34 can be used to lock and limit the sample core passing through, so as to prevent the sample core passing through the second elastic tongue 34 from falling out of the movable core storage barrel 32 When the large-diameter sample core is stored, the two fixing screws 37 are loosened and the movable core storage barrel 32 is pulled out from the fixed core storage barrel 31. At this time, the second spring tongue 34 will be pulled out from the fixed core storage barrel 31 along with the movable core storage barrel 32. Then, when the large-diameter sample core enters the fixed core storage barrel 31, it will push the first spring tongue 33 outward, and then the magnetic block will be sensed by the induction probe 36. When the large-diameter sample core passes through the first spring tongue 33, the spring in the spring tongue positioning frame 35 pushes the first spring tongue 33 into the fixed core storage barrel 31, and then the sample core that has passed through is locked and limited by the first spring tongue 33.

[0035] In this embodiment, the partition mechanism 4 includes a spacer storage cylinder 44, which is located below the fixed core storage cylinder 31. Two mutually interlocking guide frames 43 are provided on the lower side of the spacer storage cylinder 44. A chain 42 is slidably connected inside the guide frame 43. A push hydraulic rod 41 for pushing the chain 42 to move is fixed at the other end of the two guide frames 43. An L-shaped slide groove for moving the chain 42 is opened between the two guide frames 43, and the upper end of the L-shaped slide groove is connected to the fixed core storage cylinder 31 and the movable core storage cylinder 31. The spacer introduction groove 38 of the storage core cylinder 32 corresponds to the spacer introduction groove 38. The two guide frames 43 are provided with a slot connected to the spacer storage cylinder 44 near the spacer introduction groove 38, and the slot is connected to the L-shaped slide. The other end of the spacer storage cylinder 44 is fixed with an oil supply seat 45. The other end of the oil supply seat 45 is provided with an oil hole for supplying oil to the inside of the spacer storage cylinder 44. The upper side of the other end of the fixed storage core cylinder 31 is provided with an oil guide seat 46. The oil guide seat 46 is connected to the oil hole of the oil supply seat 45 through an oil pipe. When it is necessary to adjust the small diameter When the sample core is separated, the oil is supplied to the oil supply seat 45 through the oil pipe by the oil guide seat 46. The oil supplied to the spacer storage cylinder 44 by the oil supply seat 45 pushes the spacer to move into the slots of the two guide frames 43. When the first spacer at one end of the spacer storage cylinder 44 enters the slot, the oil supply to the oil supply seat 45 is stopped. Then the telescopic part of the hydraulic rod 41 is pushed to push the chain 42 to move along the L-shaped slide groove of the two guide frames 43. Then one end of the chain 42 will move along the L-shaped slide groove. The separator in the slot is pushed from the upper ends of the two guide frames 43 through the spring tongues of the fixed core storage barrel 31 and the movable core storage barrel 32 into the movable core storage barrel 32. The separator that enters the movable core storage barrel 32 will be located at the end of the sample core that has just entered the movable core storage barrel 32, and the separation process of the small-diameter sample core is completed. When the large-diameter sample core needs to be separated, the above operation is repeated, and the separator is pushed into the fixed core storage barrel 31 through the chain 42.

[0036] In this embodiment, the sampling assembly 2 includes a hydraulic motor 21, and a drill bit 22 is fixed to the rotating part of the hydraulic motor 21. The rotating part of the hydraulic motor 21 drives the drill bit 22 to rotate. At the same time, when drilling sample cores of different diameters, the drill bit 22 of the corresponding size can be replaced.

[0037] Working principle: When drilling and sampling the harder rock on the side wall of the oil well, the hydraulic motor 21 is replaced with a drill bit 22 with a smaller diameter to reduce the resistance of the drill bit 22 when drilling. Then the movable core barrel 32 is inserted into the fixed core barrel 31, and the second spring tongue 34 and the first spring tongue 33 are engaged with each other. At the same time, the position of the movable core barrel 32 in the fixed core barrel 31 is fixed by two fixing screws 37. Then, when the small diameter sample core enters the movable core barrel 32, the small diameter sample core will move toward the movable core barrel. The outer side of the cylinder 32 pushes the second elastic tongue 34, and at this time, the second elastic tongue 34 synchronously pushes the first elastic tongue 33 to move in the direction of the elastic tongue elastic slot 39 away from the fixed core storage cylinder 31. At this time, the magnetic block on the first elastic tongue 33 will be sensed and recorded by the induction probe 36. As the small-diameter sample core passes through the second elastic tongue 34, the oil is supplied to the oil supply seat 45 through the oil pipe using the oil guide seat 46. The oil supplied to the spacer storage cylinder 44 by the oil supply seat 45 pushes the spacer to move into the slots of the two guide frames 43. When the first spacer at one end of the spacer storage cylinder 44 is When the spacer enters the slot, the oil supply to the oil supply seat 45 is stopped, and then the telescopic part of the hydraulic rod 41 is pushed to push the chain 42 to move along the L-shaped slide groove of the two guide frames 43. Then one end of the chain 42 will follow the L-shaped slide groove to push the spacer in the slot from the upper end of the two guide frames 43 through the spring tongue spring groove 39 of the fixed core barrel 31 and the movable core barrel 32 into the interior of the movable core barrel 32. Then the spacer that enters the movable core barrel 32 will be located between the sample core that has just entered the movable core barrel 32 and the second spring tongue 34. After the next sample core entering the movable core storage barrel 32 is separated from the previous sample core, the spring in the spring tongue positioning frame 35 pushes the first spring tongue 33 to re-enter the spring tongue spring-in slot 39 of the fixed core storage barrel 31. At the same time, the second spring tongue 34 also follows the first spring tongue 33 and extends into the movable core storage barrel 32. At this time, the second spring tongue 34 can be used to lock and limit the sample core passing through, preventing the sample core passing through the second spring tongue 34 from falling out of the movable core storage barrel 32, and then the entire small-diameter sample core storage process is completed;

[0038] When the sidewall of the oil well is made of relatively soft rock, the two fixing screws 37 are loosened and the movable core barrel 32 is pulled out from the fixed core barrel 31. At this time, the second spring tongue 34 will be pulled out from the fixed core barrel 31 along with the movable core barrel 32. Then, when the large-diameter sample core enters the fixed core barrel 31, it will push the first spring tongue 33 outward, and then the magnetic block will be sensed by the induction probe 36. When the large-diameter sample core passes through the first spring tongue 33, the above operation is repeated, and the separator is pushed into the fixed core barrel 31 by the chain 42. Then, the separator is located between the first spring tongue 33 and the tail of the sample core, and the next sample core entering the fixed core barrel 31 is separated from the previous sample core. Then, the first spring tongue 33 is pushed into the fixed core barrel 31 by the spring in the spring tongue positioning frame 35, and the sample core passing through is locked and limited by the first spring tongue 33.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A variable core storage cartridge for coring oil wells, comprising a housing (5), a sampling assembly (2) disposed inside the housing (5), and a side thrust assembly (1) disposed on one side of the sampling assembly (2), characterized in that: It also includes a collection mechanism (3) for storing sample cores of different diameters and a separation mechanism (4) for separating multiple sample cores inside the collection mechanism (3); The collecting mechanism (3) comprises a fixed core storage barrel (31), a movable core storage barrel (32) is provided inside the fixed core storage barrel (31), a spacer introduction groove (38) arranged along the radial direction of the fixed core storage barrel (31) and the movable core storage barrel (32) is provided at the lower side of one end thereof, a second spring tongue (34) is hinged in the spring tongue spring-in groove (39) of the movable core storage barrel (32), a spring tongue positioning frame (35) is provided at the rear side of the fixed core storage barrel (31), a first spring tongue (33) is hinged in the spring tongue positioning frame (35), a sensing probe (36) for sensing the passage of the sample core is provided on one side of the spring tongue positioning frame (35), and the fixed core storage barrel (31) and the movable core storage barrel (32) are connected by two symmetrically arranged fixing screws (37); The partition mechanism (4) includes a spacer storage cylinder (44), the spacer storage cylinder (44) is located below the fixed core storage cylinder (31), and two mutually engaged guide frames (43) are provided on the lower side of the spacer storage cylinder (44), a chain (42) is slidably connected inside the guide frame (43), and a push hydraulic rod (41) for pushing the chain (42) to move is fixed at the other end of the two guide frames (43), an L-shaped sliding groove for moving the chain (42) is provided between the two guide frames (43), and the upper end of the L-shaped sliding groove corresponds to the spacer introduction groove (38) of the fixed core storage cylinder (31) and the movable core storage cylinder (32), and a notch connected to the spacer storage cylinder (44) is provided at a position close to the spacer introduction groove (38), and the notch is connected to the L-shaped sliding groove.

2. The variable core storage barrel for oil well coring according to claim 1, characterized in that: One end of the fixed core storage barrel (31) and the movable core storage barrel (32) are both provided with a spring tongue spring-in groove (39) arranged along the axial direction of the two.

3. The variable core storage barrel for oil well coring according to claim 1, characterized in that: One end of the first spring tongue (33) extends into the spring tongue spring-in slot (39) on the fixed core storage tube (31) and fits with the rear side of the second spring tongue (34).

4. The variable core storage barrel for oil well coring according to claim 1, characterized in that: A spring for pushing the rear side of the first spring tongue (33) is provided inside the spring tongue positioning frame (35), and a magnetic block is provided on the side of the first spring tongue (33) close to the sensing probe (36).

5. The variable core storage barrel for oil well coring according to claim 1, characterized in that: An oil supply seat (45) is fixed to the other end of the spacer storage cylinder (44), and an oil hole for supplying oil to the inside of the spacer storage cylinder (44) is opened at the other end of the oil supply seat (45).

6. The variable core storage barrel for oil well coring according to claim 5, characterized in that: An oil guide seat (46) is provided on the upper side of the other end of the fixed core storage cylinder (31), and the oil guide seat (46) is communicated with the oil hole of the oil supply seat (45) through an oil pipe.

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