Steel pipe cable pushing device

Abstract

The invention discloses a steel pipe cable pushing device, and relates to the technical field of oil field oil and water well testing. The two rows of extrusion wheel sets are arranged on the rack in a bilateral symmetry mode, a gap between the two rows of extrusion wheel sets is used for arranging a steel pipe cable in a penetrating mode, and the distance between the two rows of extrusion wheel sets can be adjusted; the driving mechanism can drive the two rows of extrusion wheel sets to rotate synchronously and oppositely, and the rotation directions of the two extrusion wheel sets are opposite. According to the steel pipe cable pushing device, when pressure difference exists inside and outside a well, the steel pipe cable can still be conveyed into the well.

Description

Technical Field

[0001] The invention relates to the technical field of oil field oil and water well testing, in particular to a steel pipe cable pushing device. Background Art

[0002] When testing oil and water wells in oil fields, it is necessary to transport steel pipe cables under pressure into the well. However, there is a large pressure difference between the inside and outside of the well when the steel pipe cables are lowered into the well. As the pressure in the well increases, the resistance of the steel pipe cables lowered into the well increases accordingly. When the resistance exceeds the weight of the instrument, the steel pipe cables cannot be lowered, causing construction difficulties. Therefore, it is urgent to design a steel pipe cable pushing device that can overcome the pressure in the well, so that when there is a pressure difference between the inside and outside of the well, the steel pipe cables can still be transported into the well. Summary of the invention

[0003] The purpose of the present invention is to provide a steel pipe cable pushing device to solve the problems existing in the above-mentioned prior art, and when there is a pressure difference between the inside and outside of the well, the steel pipe cable can still be transported into the well.

[0004] To achieve the above object, the present invention provides the following solutions: The present invention provides a steel pipe cable pushing device, comprising: frame; Two rows of extrusion wheel groups are arranged symmetrically on the frame, the gap between the two rows of extrusion wheel groups is used to pass the steel pipe cable, and the distance between the two rows of extrusion wheel groups can be adjusted; The driving mechanism can drive the two rows of extrusion wheel groups to rotate synchronously towards each other, and the rotation directions of the two rows of extrusion wheel groups are opposite.

[0005] Preferably, the frame includes a front connecting plate and a rear connecting plate arranged symmetrically, a first main body plate and a second main body plate are provided between the front connecting plate and the rear connecting plate, two sides of the first main body plate are fixedly connected to the front connecting plate and the rear connecting plate, and the second main body plate can move toward or away from the first main body plate; the two extrusion wheel groups are respectively arranged on the first main body plate and the second main body plate.

[0006] Preferably, a vertically arranged movable plate is fixedly provided on one end of the front connecting plate and the rear connecting plate close to the second main body plate, and one end of the second main body plate away from the first main body plate is connected to the movable plate via a moving device.

[0007] Preferably, the moving device includes an extrusion piston assembly, which includes a plurality of hydraulic cylinders evenly arranged from top to bottom, the hydraulic cylinders are horizontally fixed at one end of the second main body plate, and the ends of the telescopic rods of the hydraulic cylinders are fixedly connected to the movable plate.

[0008] Preferably, the extrusion wheel assembly comprises a plurality of extrusion wheels arranged sequentially from top to bottom, and the extrusion wheels are transmission-connected to the driving mechanism via a wheel axle.

[0009] Preferably, the driving mechanism includes a driving gear set and a driven gear set which are arranged symmetrically with each other and have a gap. The multiple driving gears of the driving gear set are connected one-to-one with the extrusion wheels of one of the extrusion wheel sets through wheel axles, and the multiple driven gears of the driven gear set are connected one-to-one with the extrusion wheels of another extrusion wheel set through wheel axles; the driving gear and the driven gear are externally connected to a transmission device.

[0010] Preferably, the transmission device includes a hydraulic motor, each of the driving gears is coaxially connected to a driving wheel, the driving wheel is connected to the hydraulic motor via a reducer, each of the driving wheels is connected to a driven wheel via gear meshing, and the driven wheels are coaxially connected to the driven gears one by one, that is, the driving wheel and the driven wheel are both gear structures, and the two are meshed. Since the distance adjustment size between the two rows of extrusion wheel groups is small, which is smaller than the length of the teeth of the driving wheel and the driven wheel, when the two rows of extrusion wheel groups adjust the spacing, the driving wheel and the driven wheel are always in a meshing transmission state.

[0011] Preferably, the transmission device includes a hydraulic motor, the hydraulic motor is connected to a driving wheel via a reducer, the driving wheel is coaxially connected to one of the driving gears, the driving wheel is connected to a driven wheel via gear meshing, the driven wheel is coaxially connected to one of the driven gears; a reversing driven gear is meshed and connected between two adjacent driving gears.

[0012] Preferably, the driving gear is fixedly connected to one end of the corresponding wheel axle through a spline, and the other end of the wheel axle is fixedly connected to the corresponding extrusion wheel through a spline; the driven gear is fixedly connected to one end of the corresponding wheel axle through a spline, and the other end of the wheel axle is fixedly connected to the corresponding extrusion wheel through a spline.

[0013] Preferably, the front connecting plate has a length of 750 cm, a width of 392 cm, and a height of 130 cm; and the size of the rear connecting plate is the same as that of the front connecting plate.

[0014] Compared with the prior art, the present invention has achieved the following technical effects: The present invention uses two rows of extrusion wheel groups arranged symmetrically on the left and right to extend the steel pipe cable into the gap between the two rows of extrusion wheel groups and contact the surface of the extrusion wheel groups, thereby driving the two rows of extrusion wheel groups to rotate synchronously towards each other, and then can use rolling friction and extrusion force to provide a pushing force for the steel pipe cable, so that the steel pipe cable can overcome the downhole pressure; the spacing between the two rows of extrusion wheel groups can be adjusted, so that different sizes of clamping force can be provided to the steel pipe cable, and the size of the extrusion wheel group can be changed, thereby changing the spacing between the two rows of extrusion wheel groups, which can be suitable for steel pipe cables of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

[0016] Figure 1 This is a schematic diagram of a steel tube cable pushing device in one embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a steel tube cable pushing device in one embodiment of the present invention; Figure 3 This is a schematic diagram from another angle of the internal structure of the steel tube cable pushing device in one embodiment of the present invention.

[0017] In the figure: 1-hydraulic motor, 2-reducer, 3-connecting plate, 4-front connecting plate, 5-movable plate, 6-rear connecting plate, 7-first main body plate, 8-second main body plate, 9-driving gear set, 10-driven gear set, 11-reversing driven gear set, 12-extrusion piston assembly, 13-driving wheel, 14-driven wheel, 15-extrusion wheel set. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The purpose of the present invention is to provide a steel pipe cable pushing device to solve the problems existing in the above-mentioned prior art, and when there is a pressure difference between the inside and outside of the well, the steel pipe cable can still be transported into the well.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] During the process of lowering the steel pipe cable into the well, the blowout preventer is lowered into the well through the wellhead. There is a pressure difference between the inside and outside of the blowout preventer. As the pressure inside the blowout preventer increases, the resistance of the steel pipe cable going down the well becomes larger accordingly. When the resistance exceeds the weight of the instrument, the steel pipe cable cannot be lowered, causing construction difficulties. In order to solve this problem, the present invention provides a steel pipe cable pushing device, such as Figure 1 , Figure 2 , Figure 3 As shown, it includes a frame, and two rows of extrusion wheel groups 15 are symmetrically arranged on the frame. The gap between the two rows of extrusion wheel groups 15 is used to pass the steel pipe cable. The extrusion wheel groups 15 are in contact with the surface of the steel pipe cable, and the spacing between the two rows of extrusion wheel groups 15 can be adjusted; the driving mechanism can drive the two rows of extrusion wheel groups 15 to rotate synchronously, and the rotation directions of the two rows of extrusion wheel groups 15 are opposite. The extrusion wheel groups 15 rotate, and the steel pipe cable clamped between the two rows of extrusion wheel groups 15 is pushed through friction and extrusion force. The pushing force can reach 60KN, which is greater than the resistance to going down to the well. Due to the pushing force of the extrusion wheel groups 15, the steel pipe cable can be smoothly lowered into the well.

[0022] In a specific embodiment, the frame is a rectangular structure with a hollow interior and openings at both ends. Specifically, the frame includes a symmetrically arranged front connecting plate 4 and a rear connecting plate 6. The front connecting plate 4 is 750 cm long, 392 cm wide, and 130 cm high. The rear connecting plate 6 has the same size as the front connecting plate 4. The main material is high-strength aluminum alloy. The overall weight is about 270 kg. It is small in size, light in weight, has a large main driving force, and is easy and reliable to operate. Figure 1 , Figure 2 , Figure 3 Taking an example to illustrate, a first main body plate 7 is provided at the left end between the front connecting plate 4 and the rear connecting plate 6, and a second main body plate 8 is provided at the right end between the front connecting plate 4 and the rear connecting plate 6. Both sides of the first main body plate 7 are fixedly connected to the front connecting plate 4 and the rear connecting plate 6, and the second main body plate 8 can move toward or away from the first main body plate 7, that is, the second main body plate 8 can move left and right in the space between the front connecting plate 4 and the rear connecting plate 6; two rows of extrusion wheel groups 15 are respectively arranged on the first main body plate 7 and the second main body plate 8. When the second main body plate 8 moves, it drives one of the extrusion wheel groups 15 to move synchronously.

[0023] In order to achieve the synchronous left and right movement of the second main body plate 8, in a preferred embodiment, a vertically arranged movable plate 5 is fixedly provided at one end of the front connecting plate 4 and the rear connecting plate 6 close to the second main body plate 8, and the end of the second main body plate 8 away from the first main body plate 7 is connected to the movable plate 5 by an extrusion piston assembly 12; the extrusion piston assembly 12 of this embodiment includes a plurality of hydraulic cylinders evenly arranged from top to bottom, the hydraulic cylinders are horizontally fixed at one end of the second main body plate 8, the ends of the telescopic rods of the hydraulic cylinders are fixedly connected to the movable plate 5, the oil circuits of the plurality of hydraulic cylinders are arranged in parallel, and are all connected to the same manual hydraulic pump, and the piston rod extends after the manual hydraulic pump applies pressure, and the end of the piston rod is axially fixed due to the restriction of the movable plate 5, and the hydraulic cylinder fixed on the second main body plate 8 under the reaction force drives the second main body plate 8 to perform axial displacement and move toward the first main body plate 7, thereby achieving the purpose of clamping, and the clamping force is controlled and adjusted by adjusting the pressure change of the manual hydraulic pump.

[0024] Due to the flexible characteristics of the steel tube cable, it is impossible to completely push it into the well by only applying a pushing and clamping force in the axial direction. In order to achieve axial pushing of the steel tube cable, the extrusion wheel group 15 of this embodiment is designed as a plurality of extrusion wheels arranged in sequence from top to bottom, and the extrusion wheel is connected to the driving mechanism through a wheel axle arranged on the first main plate 7 or the second main plate 8. A groove is provided at the position where the extrusion wheel group is installed on the first main plate 7 or the second main plate 8, so as to form an installation space for the extrusion wheel group 15. The wheel axle is passed through the first main plate 7 or the second main plate 8 through a bearing, and one end of the wheel axle is connected to the corresponding extrusion wheel through a spline. There is a gap between the upper and lower adjacent extrusion wheels, and there is no interference. The multiple extrusion wheels are arranged in sequence up and down, so that extrusion and pushing force can be applied to a certain length of steel tube cable at the same time, and the verticality of the steel tube cable during transportation can be ensured.

[0025] The specific structure of the driving mechanism is not limited, and an electric motor or a hydraulic motor can be used. The driving mechanism of this embodiment adopts a driving gear set 9 and a driven gear set 10 that are arranged symmetrically and have a gap. The multiple driving gears of the driving gear set 9 are connected one-to-one with the extrusion wheels of one of the extrusion wheel sets 15 through the wheel shaft, and the multiple driven gears of the driven gear set 10 are connected one-to-one with the extrusion wheels of the other extrusion wheel set 15 through the wheel shaft; the driving gear and the driven gear are externally connected to a transmission device, and there is a gap between the driving gear set 9 and the driving gear and the driven gear of the driven gear set 10, and the gap is greater than the left and right moving length of the second main plate 8, so that when the second main plate 8 moves left and right, the driving gear will never mesh with the driven gear. In this embodiment, each driving gear is coaxially connected to a A driving wheel 13 is connected to the hydraulic motor 1 through a reducer 2, and each driving wheel 13 is connected to a driven wheel 14 through gear meshing, that is, the driving wheel and the driven wheel are both gear structures, and the two are meshed. Since the distance adjustment size between the two rows of extrusion wheel groups is small, which is smaller than the length of the teeth of the driving wheel and the driven wheel, when the two rows of extrusion wheel groups adjust the spacing, the driving wheel and the driven wheel are always in a meshing transmission state; in addition, the driving wheel 13 can also be connected to the corresponding driven wheel 14 through a closed transmission belt, and the specific connection scheme can be selected as needed; the driven wheel 14 is coaxially connected with the driven gear one by one, and multiple hydraulic motors 1 are used to drive the corresponding driving wheel 13 and the driven wheel 14 to rotate respectively, thereby achieving the purpose of synchronously rotating the extrusion wheels of the two rows of extrusion wheel groups 15.

[0026] In another preferred embodiment, only one hydraulic motor 1 can be used for transmission. The hydraulic motor 1 is fixed to the front connecting plate by a connecting plate 3. In order to realize the driving function, a reversing driven gear set 11 is introduced. The reversing driven gear set 11 includes multiple reversing driven gears. The reversing driven gear in this embodiment is a gear whose diameter is smaller than the diameter of the driving gear and the driven gear. The hydraulic motor 1 is connected to a driving wheel 13 through a reducer. The driving wheel 13 is coaxially connected to one of the driving gears. The driving wheel 13 is meshed with a driven wheel 14 through gears. The driven wheel 14 is coaxially connected to one of the driven gears; a reversing driven gear is meshed between two adjacent driving gears. Similarly, a reversing driven gear is also meshed between two adjacent driven gears. The hydraulic motor 1 drives the driving wheel 13 to rotate, and the driving wheel 13 drives the driving gear connected thereto to rotate, and the driving gear drives multiple driving gears to rotate in the same direction in sequence through the meshing reversing driven gear; similarly, the driven wheel 14 drives the driven gear connected thereto to rotate, so that the gear drives multiple driven gears to rotate in the same direction in sequence through the meshing reversing driven gear, thereby realizing the synchronous rotation of the two sets of extrusion wheels, and realizing the extrusion and pushing of the steel pipe cable between the extrusion wheels.

[0027] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A steel pipe cable pushing device, characterized in that: include: frame; Two rows of extrusion wheel groups are arranged symmetrically on the frame, the gap between the two rows of extrusion wheel groups is used to pass the steel pipe cable, and the distance between the two rows of extrusion wheel groups can be adjusted; The driving mechanism can drive the two rows of extrusion wheel groups to rotate synchronously towards each other, and the rotation directions of the two rows of extrusion wheel groups are opposite.

2. The steel pipe cable pushing device according to claim 1 is characterized in that: The frame includes a front connecting plate and a rear connecting plate arranged symmetrically, a first main body plate and a second main body plate are provided between the front connecting plate and the rear connecting plate, two sides of the first main body plate are fixedly connected to the front connecting plate and the rear connecting plate, and the second main body plate can move toward or away from the first main body plate; the two extrusion wheel groups are respectively arranged on the first main body plate and the second main body plate.

3. The steel pipe cable pushing device according to claim 2 is characterized in that: A vertically arranged movable plate is fixedly disposed on one end of the front connecting plate and the rear connecting plate close to the second main body plate, and one end of the second main body plate away from the first main body plate is connected to the movable plate via a moving device.

4. The steel pipe cable pushing device according to claim 3 is characterized in that: The moving device includes an extrusion piston assembly, which includes a plurality of hydraulic cylinders evenly arranged from top to bottom. The hydraulic cylinder is horizontally fixed at one end of the second main body plate, and the end of the telescopic rod of the hydraulic cylinder is fixedly connected to the movable plate.

5. The steel pipe cable pushing device according to claim 1, characterized in that: The extrusion wheel set comprises a plurality of extrusion wheels arranged in sequence from top to bottom, and the extrusion wheels are transmission-connected to the driving mechanism via wheel axles.

6. The steel pipe cable pushing device according to claim 5, characterized in that: The driving mechanism comprises a driving gear set and a driven gear set which are arranged symmetrically with a gap, wherein the multiple driving gears of the driving gear set are connected one-to-one with the extrusion wheels of one of the extrusion wheel sets through axles, and the multiple driven gears of the driven gear set are connected one-to-one with the extrusion wheels of the other extrusion wheel set through axles; and the driving gear and the driven gear are externally connected with a transmission device.

7. The steel pipe cable pushing device according to claim 6, characterized in that: The transmission device includes a hydraulic motor, each of the driving gears is coaxially connected to a driving wheel, the driving wheel is connected to the hydraulic motor through a reducer, each of the driving wheels is connected to a driven wheel through gear meshing, and the driven wheels are coaxially connected to the driven gears one by one.

8. The steel pipe cable pushing device according to claim 6, characterized in that: The transmission device includes a hydraulic motor, which is connected to a driving wheel through a reducer, and the driving wheel is coaxially connected to one of the driving gears. The driving wheel is connected to a driven wheel through gear meshing transmission, and the driven wheel is coaxially connected to one of the driven gears; a reversing driven gear is meshed and connected between two adjacent driving gears.

9. The steel pipe cable pushing device according to claim 6, characterized in that: The driving gear is fixedly connected to one end of the corresponding wheel axle through a spline, and the other end of the wheel axle is fixedly connected to the corresponding extrusion wheel through a spline; the driven gear is fixedly connected to one end of the corresponding wheel axle through a spline, and the other end of the wheel axle is fixedly connected to the corresponding extrusion wheel through a spline.

10. The steel pipe cable pushing device according to claim 2, characterized in that: The front connecting plate has a length of 750 cm, a width of 392 cm and a height of 130 cm; the size of the rear connecting plate is the same as that of the front connecting plate.

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