An integrated system for increasing oilfield gas-liquid mixed transportation and production

Abstract

The present invention discloses an integrated system for increasing the production of gas-liquid mixed transportation in oil fields, and belongs to the technical field of oil and gas field exploitation technology. It includes: a left piston cylinder and a right piston cylinder are coaxially arranged, and the piston rod ends are opposite to each other; a driving mechanism is used to drive the piston rods of the left piston cylinder and the right piston cylinder. The driving mechanism includes: a driving plate is arranged in the same direction between the piston rod ends of the left piston cylinder and the right piston cylinder; an elongated hole in the same direction as the left piston cylinder is opened on the driving plate, and a circle of driving teeth is fixed along the inner wall of the elongated hole; the driving gear is meshed with the driving teeth in the elongated hole; two floating connectors are respectively installed at both ends of the driving plate; the piston rod ends of the left piston cylinder and the right piston cylinder are connected to the floating connectors on the corresponding sides; and a guide assembly is used to limit the moving route of the driving plate. The present invention adopts a new driving mechanism and a floating connection structure, and directly drives the piston rod of the piston cylinder by meshing the driving gear with the annular driving teeth on the driving plate to achieve efficient energy transfer.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas field exploitation technology, and in particular to an oil field gas-liquid mixed transportation production-increasing integrated system. Background Art

[0002] In the middle and late stages of natural gas field development, as gas production operations proceed, the wellhead pressure of the gas field will drop rapidly. At the same time, liquid will accumulate in the gas well, and the wellhead pressure will be low, so the natural gas at the bottom of the well cannot enter the gas pipeline network. Therefore, in oil field development, the gas-liquid mixed transmission booster pump is one of the indispensable equipment. It is mainly responsible for boosting and transporting the gas-liquid mixture produced in the oil field to ensure production efficiency and transportation safety.

[0003] However, traditional gas-liquid mixed flow booster pumps mostly use a crank-connecting rod mechanism to drive the piston movement. The crank-connecting rod mechanism has large friction and energy loss during energy transfer, resulting in a decrease in the overall efficiency of the pump. During operation, the gas-liquid mixed flow booster pump is prone to eccentric rotation due to uneven force, which affects the stability and service life of the pump. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the present invention provides an integrated system for increasing oilfield gas-liquid mixed transportation production.

[0005] The present invention adopts the following technical solution: an integrated system for increasing oilfield gas-liquid mixed transportation production, comprising:

[0006] A left piston cylinder and a right piston cylinder, wherein the left piston cylinder and the right piston cylinder are coaxially arranged and the piston rod ends are opposite to each other;

[0007] A driving mechanism, connected between the piston rod ends of the left piston cylinder and the right piston cylinder, and used for driving the piston rods of the left piston cylinder and the right piston cylinder;

[0008] The driving mechanism includes:

[0009] A driving plate is arranged in the same direction between the piston rod ends of the left piston cylinder and the right piston cylinder; the driving plate is provided with an elongated hole in the same direction as the left piston cylinder, and a circle of driving teeth is fixed along the inner wall of the elongated hole;

[0010] A driving gear meshing with the driving teeth in the elongated hole to drive the driving plate to move;

[0011] Two floating connectors are respectively installed at the two ends of the driving plate; the piston rod ends of the left piston cylinder and the right piston cylinder are connected to the floating connectors on the corresponding sides;

[0012] The guide assembly is used to limit the moving path of the driving plate so that the driving teeth are always meshed with the driving gear.

[0013] Furthermore, the floating connection comprises:

[0014] A floating plate is arranged above the driving plate and is hinged to the piston rod ends of the left piston cylinder and the right piston cylinder on the corresponding side; an upper elongated through slot perpendicular to the driving plate is provided on the floating plate, and a lower elongated through slot parallel to the upper elongated through slot is provided on the driving plate;

[0015] Two parallel rotating shafts are inserted into the upper elongated through slot and the lower elongated through slot; rollers are respectively mounted on the rotating shafts and are rollingly connected to the upper elongated through slot and the lower elongated through slot;

[0016] An upper connecting plate is fixed to the upper ends of the two rotating shafts; the upper connecting plate abuts against the upper side of the floating plate;

[0017] The lower connecting plate is fixed on the lower ends of the two rotating shafts; the lower connecting plate abuts against the lower side surface of the driving plate.

[0018] The guide assembly comprises:

[0019] A guide plate is arranged below the driving plate; a circle of sliding grooves is provided on the upper surface of the guide plate;

[0020] A positioning block, fixed on the lower side of the driving plate;

[0021] The guide wheel is rotatably connected to the positioning block; the guide wheel is rollingly installed in the slide groove.

[0022] The guide assemblies are provided with two, and the two guide assemblies are symmetrically arranged on both sides of the driving plate.

[0023] The driving gear is fixed on one end of the gear shaft; the other end of the gear shaft is connected to the driving shaft through a pair of mutually meshing helical gears; the driving shaft is perpendicular to the left piston cylinder, and both ends of the driving shaft are connected to a rotary driving assembly.

[0024] The rod chambers of the left piston cylinder and the right piston cylinder are connected through an oil pipe.

[0025] The rod chambers of the left piston cylinder and the right piston cylinder are connected to the oil replenishing tank through oil pipes.

[0026] The rodless chambers of the left piston cylinder and the right piston cylinder are respectively connected with an air inlet pipe and an air outlet pipe; a filter and an air inlet check valve are installed in the air inlet pipe; and an air outlet check valve is installed in the air outlet pipe.

[0027] The beneficial effects of the present invention are:

[0028] The drive gear meshes with the annular drive teeth on the drive plate to directly drive the piston rod of the piston cylinder, achieving efficient energy transmission; compared with the traditional crank-connecting rod mechanism, this design reduces energy loss and improves the efficiency of the pump.

[0029] The driving gear rotates in one direction, while the driving plate relies on the precise control of the annular driving teeth and the guide assembly to complete automatic reversing. This design simplifies the structure of the pump and reduces the complexity and maintenance cost of the reversing mechanism.

[0030] The driving plate is a floating structure. The guide assembly uses point support to limit the driving plate, and then cooperates with the floating connectors on both sides to limit the driving plate, ensuring the precise trajectory of the driving plate during movement, preventing the driving plate from deflecting or tilting during movement, and ensuring the meshing of the driving gear and the driving teeth to complete the reversing of the driving plate;

[0031] The coaxial symmetrical arrangement of the left piston cylinder and the right piston cylinder allows the pump to be more evenly stressed during operation and prevents eccentric load rotation. The rod chamber between the left piston cylinder and the right piston cylinder is connected through a soft oil pipe and connected to the oil replenishing tank, which can always lubricate the piston, reduce wear and consumption, and extend the service life of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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 or the description of the prior art 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.

[0033] Figure 1 It is a stereoscopic diagram of an integrated system for increasing oilfield gas-liquid mixed transportation production in the present invention.

[0034] Figure 2 for Figure 1 An enlarged view of the driving mechanism.

[0035] Figure 3 for Figure 2 Main view in

[0036] Figure 4 A perspective view of the guide assembly.

[0037] Figure 5 This is an exploded view of a floating connector.

[0038] Figure 6 for Figure 1 Enlarged view of the piston cylinder section on the left.

[0039] Figure 7 It is a schematic diagram of the structure of multiple groups arranged in parallel in the present invention.

[0040] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0041] Description of reference numerals:

[0042] 1. Left piston cylinder;

[0043] 2. Right piston cylinder;

[0044] 3. driving plate; 31. long hole; 32. driving tooth; 33. lower long through slot;

[0045] 4. driving gear; 41. gear shaft; 42. helical gear;

[0046] 5. floating connector; 51. floating plate; 511. upper elongated through slot; 52. rotating shaft; 53. roller; 54. upper connecting plate; 55. lower connecting plate;

[0047] 6. Guide assembly; 61. Guide plate; 611. Slideway; 62. Positioning block; 63. Guide wheel;

[0048] 7. Drive shaft;

[0049] 81. Inlet pipe; 82. Outlet pipe; 83. Inlet check valve; 84. Outlet check valve; 85. Filter. DETAILED DESCRIPTION

[0050] 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.

[0051] Embodiment 1:

[0052] like Figure 1 As shown, the present invention provides an integrated system for increasing the production of gas and liquid mixed transportation in oil fields. The left piston cylinder 1 and the right piston cylinder 2 are coaxially fixed on the foundation, and the piston rod ends of the two are opposite to each other. The driving mechanism is connected between the piston rod ends of the left piston cylinder 1 and the right piston cylinder 2, and is used to simultaneously drive the piston rods of the left piston cylinder 1 and the right piston cylinder 2 to perform telescopic movements.

[0053] like Figures 1 to 3 As shown, the driving mechanism includes a driving plate 3, which is slidably mounted on a guide assembly 6, and the guide assembly 6 is fixed on the foundation. Both ends of the driving plate 3 are connected to floating connectors 5, and the piston rods of the left piston cylinder 1 and the right piston cylinder 2 are connected to the floating connectors 5 on the corresponding sides.

[0054] The driving plate 3 is provided with an elongated hole 31 in the same direction as the left piston cylinder 1, and a circle of driving teeth 32 is fixed along the inner wall of the elongated hole 31. The driving gear 4 is used as a power output component, which is connected to a rotary driving assembly. The driving gear 4 meshes with the driving teeth 32 in the elongated hole 31; when the driving gear 4 rotates, the driving plate 3 is driven to move, thereby driving the piston rods of the left piston cylinder 1 and the right piston cylinder 2 on both sides to perform telescopic movements.

[0055] The moving track of the driving plate 3 is limited by the guide assembly 6 and the floating connectors 5 on both sides, so as to ensure that the driving teeth 32 in the driving plate 3 are always meshed with the driving gear 4, so that the driving plate 3 completes the reversal when the driving gear 4 is meshed with the end arc-shaped driving teeth 32. Specifically:

[0056] Combination Figures 1 to 4 As shown, two guide assemblies 6 are provided, and the two guide assemblies 6 are symmetrically arranged on both sides of the driving plate 3. The guide assembly 6 includes a guide plate 61 arranged below the driving plate 3, and a circle of slide grooves 611 are provided on the upper surface of the guide plate 61. The positioning block 62 is fixed to the middle position of the lower side of the driving plate 3 by bolts, and the driving plate 3 is in a suspended state under the connection of the floating connectors 5 at both ends. A guide wheel 63 is installed under the positioning block 62 through a pin shaft rotation, and the guide wheel 63 is in rolling contact with the side wall of the slide groove 611. The two guide wheels 63 form two-point limit in the middle of the driving plate 3.

[0057] Recombination Figure 5 As shown, taking the floating connection 5 on the left piston cylinder 1 as an example:

[0058] The floating connection member 5 includes a floating plate 51 arranged above the driving plate 3, and the floating plate 51 is hinged to the piston rod end of the left piston cylinder 1. An upper elongated through slot 511 perpendicular to the driving plate 3 is provided on the floating plate 51, and a lower elongated through slot 33 parallel to and opposite to the upper elongated through slot 511 is provided on the driving plate 3. The upper connecting plate 54 and the lower connecting plate 55 are arranged in parallel, and two vertical rotating shafts 52 are hinged between the upper connecting plate 54 and the lower connecting plate 55, and the rotating shaft 52 is passed through the upper elongated through slot 511 and the lower elongated through slot 33. Rollers 53 are respectively installed on the rotating shaft 52, which are rollingly connected to the inner walls of the upper elongated through slot 511 and the lower elongated through slot 33. The upper connecting plate 54 abuts against the upper side of the floating plate 51, and the lower connecting plate 55 abuts against the lower side of the driving plate 3, so that the driving plate 3 is suspended under the two floating connections 5. The length of the upper elongated through slot 511 is greater than the distance between the two rotating shafts 52, ensuring that the driving plate 3 can freely move a certain distance along the direction of the upper elongated through slot 511. The floating connectors 5 at both ends form two-point limit for the driving plate 3, and cooperate with the limit of the two guide components 6 to ensure the final moving track of the driving plate 3, so that the driving teeth 32 in the driving plate 3 are always meshed with the driving gear 4.

[0059] When working:

[0060] The driving gear 4 rotates, and the driving gear 4 meshes with the driving teeth 32 in the driving plate 3 for transmission, thereby pushing the driving plate 3 to move; when the driving plate 3 moves to the extreme position, the driving gear 4 meshes with the semicircular driving teeth 32 at the end of the driving plate 3, completing the reversal of the driving plate 3, thereby completing the repeated thrust on the piston rods of the left piston cylinder 1 and the right piston cylinder 2 when the driving gear 4 rotates unidirectionally, thereby realizing the continuous operation of the left piston cylinder 1 and the right piston cylinder 2.

[0061] Embodiment 2:

[0062] Based on the above embodiment 1, Figure 1 and Figure 6 As shown, the rodless chambers of the left piston cylinder 1 and the right piston cylinder 2 are respectively connected to an inlet pipe 81 and an outlet pipe 82. A filter 85 and an inlet check valve 83 are installed in the inlet pipe 81, and an outlet check valve 84 is installed in the outlet pipe 82. The rod chambers of the left piston cylinder 1 and the right piston cylinder 2 are connected through an oil pipe, and the rod chambers of the left piston cylinder 1 and the right piston cylinder 2 are connected to the oil tank through the oil pipe.

[0063] When working:

[0064] When the driving mechanism drives the piston rods of the left piston cylinder 1 and the right piston cylinder 2 to perform telescopic movements, the rodless chambers of the left piston cylinder 1 and the right piston cylinder 2 complete air intake and exhaust. During air intake, the gas and liquid mixture from the gas tree enters the air intake pipe 81, passes through the filter 85 and the air intake check valve 83, and enters the rodless chambers of the left piston cylinder 1 and the right piston cylinder 2; during exhaust, the piston rod pushes the piston to squeeze the gas and liquid mixture, and the gas and liquid mixture is pressurized and transported to the production pipeline network from the air outlet pipe 82;

[0065] During the working process, the oil in the rod chamber can lubricate the piston to reduce wear and consumption. On the other hand, when exhausting, the piston will be subjected to the pressure of the oil and the mixture of gas and liquid at the same time to maintain force balance.

[0066] Embodiment three:

[0067] Based on the above embodiment 1, Figure 1 , Figure 7 and Figure 8 As shown, multiple groups of left piston cylinders 1 and right piston cylinders 2 are arranged in parallel and share a rotary drive assembly. Each driving gear 4 is fixed to one end of a gear shaft 41, and the other end of the gear shaft 41 is connected to the driving shaft 7 through a pair of mutually meshing helical gears 42. The direction of the driving shaft 7 is perpendicular to the left piston cylinder 1 and the right piston cylinder 2, and a rotary drive assembly is connected to both ends of the driving shaft 7. Multiple groups of left piston cylinders 1 and right piston cylinders 2 are driven simultaneously by a pair of rotary drive assemblies to improve the working efficiency.

[0068] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An integrated system for increasing oilfield gas-liquid mixed transportation production, characterized in that: include: A left piston cylinder (1) and a right piston cylinder (2), wherein the left piston cylinder (1) and the right piston cylinder (2) are coaxially arranged and the piston rod ends are opposite to each other; A driving mechanism connected between the piston rod ends of the left piston cylinder (1) and the right piston cylinder (2), and used for driving the piston rods of the left piston cylinder (1) and the right piston cylinder (2); The driving mechanism includes: A drive plate (3) is arranged in the same direction between the piston rod ends of the left piston cylinder (1) and the right piston cylinder (2); the drive plate (3) is provided with an elongated hole (31) in the same direction as the left piston cylinder (1), and a circle of drive teeth (32) is fixed along the inner wall of the elongated hole (31); A driving gear (4) meshing with the driving teeth (32) in the elongated hole (31) to drive the driving plate (3) to move; Two floating connecting members (5) are respectively mounted on the two ends of the driving plate (3); the piston rod ends of the left piston cylinder (1) and the right piston cylinder (2) are connected to the floating connecting members (5) on the corresponding sides; A guide assembly (6) for limiting the movement path of the drive plate (3) so that the drive tooth (32) is always in mesh with the drive gear (4); The floating connection (5) comprises: A floating plate (51) is arranged above the driving plate (3) and is hinged to the piston rod ends of the left piston cylinder (1) and the right piston cylinder (2) on the corresponding sides; an upper elongated through slot (511) perpendicular to the driving plate (3) is formed on the floating plate (51), and a lower elongated through slot (33) parallel to the upper elongated through slot (511) is formed on the driving plate (3); Two parallel rotating shafts (52) are inserted into the upper elongated through slot (511) and the lower elongated through slot (33); rollers (53) are respectively mounted on the rotating shafts (52) and are rollingly connected to the upper elongated through slot (511) and the lower elongated through slot (33); An upper connecting plate (54) is fixed to the upper ends of the two rotating shafts (52); the upper connecting plate (54) abuts against the upper side surface of the floating plate (51); A lower connecting plate (55) is fixed to the lower ends of the two rotating shafts (52); the lower connecting plate (55) abuts against the lower side of the driving plate (3); The guide assembly (6) comprises: A guide plate (61) is arranged below the driving plate (3); a circle of sliding grooves (611) is formed on the upper surface of the guide plate (61); A positioning block (62) fixed on the lower side of the driving plate (3); A guide wheel (63) is rotatably connected to the positioning block (62); the guide wheel (63) is rollingly mounted in the slide groove (611); Two guide assemblies (6) are provided, and the two guide assemblies (6) are symmetrically arranged on both sides of the driving plate (3); The two guide wheels (63) form two-point limit positions in the middle of the drive plate (3). The floating connecting members (5) at both ends form two-point limit for the driving plate (3), and cooperate with the limit of the two guide components (6) to ensure the final moving trajectory of the driving plate (3), so that the driving teeth (32) in the driving plate (3) are always meshed with the driving gear (4).

2. The integrated system for increasing oilfield gas-liquid mixed transportation production according to claim 1, characterized in that: The driving gear (4) is fixed to one end of a gear shaft (41); the other end of the gear shaft (41) is connected to a driving shaft (7) via a pair of mutually meshing helical gears (42); the driving shaft (7) is perpendicular to the left piston cylinder (1), and both ends of the driving shaft (7) are connected to a rotary driving assembly.

3. The integrated system for increasing oilfield gas-liquid mixed transportation production according to claim 1 is characterized by: The rod chambers of the left piston cylinder (1) and the right piston cylinder (2) are connected via an oil pipe.

4. The integrated system for increasing oilfield gas-liquid mixed transportation production according to claim 3 is characterized by: The rod chambers of the left piston cylinder (1) and the right piston cylinder (2) are connected to the oil replenishment tank via oil pipes.

5. The integrated system for increasing oilfield gas-liquid mixed transportation production according to claim 1 is characterized by: The rodless chambers of the left piston cylinder (1) and the right piston cylinder (2) are respectively connected to an air inlet pipe (81) and an air outlet pipe (82); a filter (85) and an air inlet check valve (83) are installed in the air inlet pipe (81); and an air outlet check valve (84) is installed in the air outlet pipe (82).

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