Pushing device for oil well coring

Abstract

The utility model relates to the technical field of oil exploration, in particular to a pushing device for oil well coring, which comprises a shell, a side pushing component, a sampling component, a pushing component, an oil supply component, a main oil supply system and a material conveying component are arranged in the shell, and when a drill bit of the sampling component is clamped, the pushing component is matched with the side pushing component to push the oil well coring. A drill bit of the sampling assembly is released; through the arrangement of the pushing assembly, the aim of timely assisting a drill bit of the sampling assembly in getting out after the drill bit is clamped is achieved, the situation that the drill bit is broken due to forced getting out of the sampling assembly is avoided, the drill bit of the sampling assembly can timely reach the next coring station after getting out of the drill bit, and meanwhile the pushing assembly and the oil supply assembly are compact in overall structure; enough space is provided for installing a large hydraulic cylinder, and the piston thrust and the piston stroke are improved. The coring quality and success rate are ensured; the technical problem that after the drill bit of the sampling assembly is clamped in the sampling position, the drill bit is prone to breakage in the well wall is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum exploration, in particular to a pushing device for coring in oil wells. Background Art

[0002] Well logging, also known as geophysical logging, is a method of measuring geophysical parameters by using the geophysical properties of rock formations, such as electrochemical properties, electrical conductivity, acoustic properties, and radioactivity. It is one of the applied geophysical methods. In the process of oil exploration and development, wellbore logging sampling is a very effective method to confirm the lithology and oil content of the formation.

[0003] A 38mm core diameter mechanical drilling sidewall coring tool is disclosed in Chinese patent publication number CN212201971U. The 38mm core diameter mechanical drilling sidewall coring tool drives a double pump through a motor. The large pump in the double pump outputs high-pressure oil into a two-position three-way solenoid valve hydraulic motor. The hydraulic motor rotates at high speed under the action of the high-pressure oil to coring.

[0004] However, compared with the existing technologies in the related field, when the sampling assembly is coring, since the inside of the oil well is full of sticky substances such as oil sludge, the drill bit is likely to be stuck in the sampling position when the sampling assembly is flipped. At this time, the sampling assembly cannot rotate or swing smoothly. If the sampling assembly is forcibly rotated or swung, the drill bit is likely to break inside the well wall, affecting the sampling barrel from reaching the next coring station. In addition, since the logging depth is deep, removing the equipment from the inside of the logging well to replace the drill bit will greatly affect the work progress. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background technology, and provide a jacking device for coring in oil wells.

[0006] The purpose of the utility model is achieved through the following technical solutions: A pushing device for coring in an oil well, comprising a shell, a side thrust assembly, a sampling assembly, a pushing assembly, an oil supply assembly, a main oil supply system and a material feeding assembly are arranged inside the shell, when the drill bit of the sampling assembly is stuck, the pushing assembly cooperates with the side thrust assembly to free the drill bit of the sampling assembly; the pushing assembly comprises a fixing part fixedly installed inside the shell, two hydraulic cylinders are symmetrically provided on both sides of the fixing part, the output ends of the two hydraulic cylinders are fixedly mounted with pushing parts, and the extension direction of the hydraulic cylinders is in the same direction as the drilling direction of the drill bit of the sampling assembly.

[0007] Preferably, the fixing member is located at the tail end of the two hydraulic cylinders and is fixedly installed with a first connecting member. The interior of the first connecting member is a hollow structure, and the tail ends of the two hydraulic cylinders are connected to the interior of the first connecting member through a cannula.

[0008] Preferably, a second connecting member is fixedly installed on the front end of the two hydraulic cylinders, and a third connecting member is installed at the position of the second connecting member corresponding to the two hydraulic cylinders. The interiors of the two third connecting members are provided with oil circuits connected to the front ends of the two hydraulic cylinders.

[0009] Preferably, the oil supply assembly includes an oil valve fixedly mounted inside the outer shell, the oil valve and the first connecting member are connected via a first oil pipe, a support block is fixedly mounted on the side of the outer shell close to the third connecting member, the support block is a hollow structure, the oil valve and the support block assembly are connected via a second oil pipe, the support block and the two third connecting members are connected via a third oil pipe, and the third oil pipe is connected to the oil circuit.

[0010] Preferably, the oil valve is connected to the main oil supply system through the fourth oil pipe and the fifth oil pipe.

[0011] Preferably, a first supporting member is fixedly installed on the position of the fixing member corresponding to the first oil pipe, and a second supporting member is fixedly installed on the position of the supporting block corresponding to the second oil pipe.

[0012] Beneficial effects:

[0013] This oil well coring jacking device, by providing a jacking assembly, can promptly assist in freeing the sampling assembly's drill bit if it becomes stuck, preventing the drill bit from breaking due to forced freeing. Once freed, the sampling assembly's drill bit can promptly reach the next coring station. The jacking assembly and oil supply assembly are compact, providing ample space for a larger hydraulic cylinder to increase piston thrust and stroke, thereby ensuring the quality and success rate of coring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 labor.

[0015] Figure 1 This is a schematic structural diagram of the housing of the utility model;

[0016] Figure 2 This is a schematic diagram of the first axial side of the sampling assembly of the present invention;

[0017] Figure 3 This is a schematic diagram of the second axial side of the sampling assembly of the present invention;

[0018] Figure 4 This is a schematic diagram of the first axial side of the push assembly of the utility model;

[0019] Figure 5 This is a schematic diagram of the second axis side of the push assembly of the utility model;

[0020] Figure 6 This is a schematic diagram of the state when the push member of the utility model is fully retracted;

[0021] Figure 7 This is a schematic diagram of the state of the push member of the utility model when it is extended;

[0022] Figure 8 This is a structural diagram of the hydraulic cylinder when the push piece of the utility model is extended.

[0023] In the figure: 1. Shell; 2. Side thrust assembly; 3. Sampling assembly; 4. Push assembly; 41. Fixing member; 411. First connecting member; 412. Cannula; 413. Second connecting member; 414. Third connecting member; 415. Oil circuit; 416. First supporting member; 417. Second supporting member; 42. Hydraulic cylinder; 43. Push member; 5. Oil supply assembly; 51. Oil valve; 511. Fourth oil pipe; 512. Fifth oil pipe; 52. First oil pipe; 53. Support block; 54. Second oil pipe; 55. Third oil pipe; 6. Main oil supply system; 7. Material conveying assembly. DETAILED DESCRIPTION

[0024] 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.

[0025] Additional aspects and advantages of the present invention will be further described below in conjunction with the accompanying drawings, and some will become apparent from the following description or be learned through practice of the present invention.

[0026] like Figures 1 to 8As shown, a pushing device for coring in an oil well comprises a shell 1, wherein a side thrust assembly 2, a sampling assembly 3, a pushing assembly 4, an oil supply assembly 5, a main oil supply system 6 and a material feeding assembly 7 are arranged inside the shell 1. When the drill bit of the sampling assembly 3 is stuck, the pushing assembly 4 cooperates with the side thrust assembly 2 to free the drill bit of the sampling assembly 3; the pushing assembly 4 comprises a fixing member 41 fixedly mounted inside the shell 1, two hydraulic cylinders 42 are symmetrically arranged on both sides of the fixing member 41, and a pushing member 43 is fixedly mounted on the output end of the two hydraulic cylinders 42, and the extension direction of the hydraulic cylinder 42 is consistent with the direction of the drilling of the sampling assembly 3. The drilling direction of the head is in the same direction. The fixing part 41 is located at the tail end of the two hydraulic cylinders 42 and is fixedly installed with a first connecting part 411. The interior of the first connecting part 411 is a hollow structure. The tail ends of the two hydraulic cylinders 42 are connected to the interior of the first connecting part 411 through a cannula 412. The fixing part 41 is located at the front end of the two hydraulic cylinders 42 and is fixedly installed with a second connecting part 413. The second connecting part 413 is installed at the position corresponding to the two hydraulic cylinders 42. The interior of the two third connecting parts 414 is provided with an oil circuit 415 connected to the front end of the two hydraulic cylinders 42.

[0027] like Figure 1 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the oil supply assembly 5 includes an oil valve 51 fixedly mounted inside the housing 1, the oil valve 51 and the first connecting member 411 are connected via a first oil pipe 52, a support block 53 is fixedly mounted on one side of the housing 1 close to the third connecting member 414, the support block 53 is a hollow structure, the oil valve 51 and the support block 53 assembly are connected via a second oil pipe 54, the support block 53 and the two third connecting members 414 are connected via a third oil pipe 55, the third oil pipe 55 is connected to the oil circuit 415, a first support member 416 is fixedly mounted on the position of the fixing member 41 corresponding to the first oil pipe 52, and a second support member 417 is fixedly mounted on the position of the support block 53 corresponding to the second oil pipe 54, and the first support member 416 and the second support member 417 are arranged. 17, which can ensure the firmness of the connection between the first oil pipe 52 and the second oil pipe 54. The oil valve 51 transports oil to the inside of the first connecting piece 411 through the first oil pipe 52, and then the oil will enter the inside of the two hydraulic cylinders 42 from the tail ends through the two inserts 412. At this time, the output ends of the two hydraulic cylinders 42 are prompted to extend due to the pressure of the oil. The oil valve 51 stops transporting oil to the first oil pipe 52, and then the oil valve 51 transports oil to the inside of the support block 53 through the second oil pipe 54. Thereafter, the oil will be transported to the oil circuit 415 of the two third connecting pieces 414 through the two third oil pipes 55. At this time, the oil inside the oil circuit 415 will enter the inside of the hydraulic cylinder 42 from the front end thereof, thereby using the pressure of the oil to prompt the output ends of the two hydraulic cylinders 42 to retract.

[0028] like Figure 2、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the oil valve 51 is connected to the main oil supply system 6 through the fourth oil pipe 511 and the fifth oil pipe 512. The main oil supply system 6 can supply oil to the inside of the oil valve 51 through the fourth oil pipe 511 and the fifth oil pipe 512, so that the oil valve 51 can control the extension and retraction of the output ends of the two hydraulic cylinders 42.

[0029] The working process is as follows:

[0030] S1, such as Figures 1 to 3 As shown, when the drill bit of the sampling assembly 3 is stuck, the side pusher of the side push assembly 2 is retracted;

[0031] S2, such as Figures 3 to 7 As shown, when the side thrust member of the side thrust assembly 2 is retracted, the oil valve 51 delivers oil to the interior of the first connecting member 411 through the first oil pipe 52. Then, the oil enters the interior of the two hydraulic cylinders 42 from the tail ends through the two inserts 412. At this time, the pressure of the oil causes the output ends of the two hydraulic cylinders 42 to extend.

[0032] S3, such as Figures 1 to 7 As shown, when the output ends of the two hydraulic cylinders 42 are extended, the pushing member 43 will gradually push the well wall, thereby causing the housing 1 to move. At this time, the displacement of the housing 1 is used to separate the drill bit of the sampling assembly 3 from the well wall.

[0033] S4, such as Figures 3 to 7 As shown, after the drill bit of the sampling assembly 3 is separated from the well wall, the sampling assembly 3 is turned over, and then the material inside the sampling assembly 3 is taken out through the material feeding assembly 7;

[0034] S5, such as Figures 3 to 8 As shown, when the drill bit of the sampling assembly 3 is separated from the well wall, the oil valve 51 stops supplying oil to the first oil pipe 52, and then the oil valve 51 supplies oil to the inside of the support block 53 through the second oil pipe 54. The oil is then supplied to the oil passages 415 of the two third connecting members 414 through the two third oil pipes 55. At this time, the oil in the oil passages 415 enters the interior of the hydraulic cylinder 42 from the front end thereof, thereby using the pressure of the oil to cause the output ends of the two hydraulic cylinders 42 to retract, and thereby the push member 43 is also retracted.

[0035] S6, such as Figures 1 to 5 As shown, when the pushing member 43 is retracted, the sampling work at the next point can be carried out.

[0036] 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 pushing device for coring in an oil well, characterized by: The invention comprises a housing (1), wherein a side thrust assembly (2), a sampling assembly (3), a top thrust assembly (4), an oil supply assembly (5), a main oil supply system (6) and a material conveying assembly (7) are provided inside the housing (1); when the drill bit of the sampling assembly (3) is stuck, the top thrust assembly (4) cooperates with the side thrust assembly (2) to free the drill bit of the sampling assembly (3); The pushing assembly (4) comprises a fixing member (41) fixedly mounted inside the housing (1), two hydraulic cylinders (42) are symmetrically provided on both sides of the fixing member (41), and pushing members (43) are fixedly mounted on the output ends of the two hydraulic cylinders (42), and the extension direction of the hydraulic cylinders (42) is in the same direction as the drilling direction of the drill bit of the sampling assembly (3).

2. The oil well coring pushing device according to claim 1, characterized in that: The fixing member (41) is located at the tail end of the two hydraulic cylinders (42) and is fixedly mounted with a first connecting member (411). The interior of the first connecting member (411) is a hollow structure. The tail ends of the two hydraulic cylinders (42) are connected to the interior of the first connecting member (411) through a cannula (412).

3. The oil well coring pushing device according to claim 2, characterized in that: The fixing member (41) is fixedly mounted with a second connecting member (413) at the front ends of the two hydraulic cylinders (42); a third connecting member (414) is mounted at positions of the second connecting member (413) corresponding to the two hydraulic cylinders (42); and an oil circuit (415) communicating with the front ends of the two hydraulic cylinders (42) is provided inside the two third connecting members (414).

4. The oil well coring pushing device according to claim 3, characterized in that: The oil supply assembly (5) comprises an oil valve (51) fixedly mounted inside the housing (1); the oil valve (51) and the first connecting member (411) are connected via a first oil pipe (52); a support block (53) is fixedly mounted on a side of the housing (1) close to the third connecting member (414); the support block (53) is a hollow structure; the oil valve (51) and the support block (53) assembly are connected via a second oil pipe (54); the support block (53) and the two third connecting members (414) are connected via a third oil pipe (55); and the third oil pipe (55) is connected to the oil circuit (415).

5. The oil well coring pushing device according to claim 4, characterized in that: The oil valve (51) is connected to the main oil supply system (6) through a fourth oil pipe (511) and a fifth oil pipe (512).

6. The oil well coring pushing device according to claim 4, characterized in that: A first support member (416) is fixedly installed on the fixing member (41) at a position corresponding to the first oil pipe (52), and a second support member (417) is fixedly installed on the supporting block (53) at a position corresponding to the second oil pipe (54).

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