A tensioning device for underground stratified water injection water distributor

Abstract

The utility model provides a tensioning device for a downhole stratified water injection distributor, comprising: an outer casing, a lower joint, an upper joint, a tensioning ring and a flow pipe; the outer casing is a cylindrical body, and the inner walls at both ends of the outer casing are provided with threads; the lower joint is threadedly connected to the first end of the outer casing; the end face of the lower joint is provided with a first groove; the upper joint is arranged at the second end of the outer casing; the side of the upper joint is provided with an annular fixing groove; the end face of the upper joint is provided with a second groove; the tensioning ring is a cylindrical body, and the tensioning ring is sleeved in the annular fixing groove of the upper joint; the tensioning ring is threadedly connected to the second end of the outer casing; the flow pipe is connected to the lower joint and the upper joint. The utility model provides a tensioning device for a downhole stratified water injection distributor, which realizes the close tensioning of the upper joint and the outer casing under the premise of ensuring that the upper joint does not rotate axially, thereby improving the stability and service life of the water injection distributor.

Description

Technical Field

[0001] The utility model relates to the field of underground stratified water injection, in particular to an underground stratified water injection water distributor tensioning device. Background Art

[0002] In the process of oilfield exploitation, water injection technology is one of the important means to improve crude oil recovery. As a key equipment in the water injection system, the stability and reliability of the performance of the underground stratified water injection distributor are directly related to the effect of water injection. The traditional underground stratified water injection distributor design often does not have a special connection device between the upper joint and the outer shell, and only relies on the friction and water pressure between the two to maintain the connection. However, in the complex underground environment, this connection method has many shortcomings.

[0003] First, due to the complex and changeable downhole environment, factors such as temperature changes, vibrations, and pressure fluctuations may affect the connection stability between the upper joint and the outer shell. After long-term operation, this connection method is prone to loosening due to friction, wear, and loosening, resulting in water leakage during the water injection process, which seriously affects the water injection effect. Secondly, since there is no special connection device between the upper joint and the outer shell, once loosening occurs, it is difficult to detect and repair it in time. This not only increases the difficulty and cost of equipment maintenance, but may also cause significant losses to oil field production. In addition, with the continuous development of oil field exploitation technology, the requirements for water injection technology are becoming higher and higher. The traditional connection method can no longer meet the requirements of modern oil field exploitation for water injection stability and reliability. Therefore, the development of a new type of downhole stratified water injection distributor tensioning device to solve the problems of loosening and leakage caused by the lack of a connection device between the upper joint and the outer shell has become an urgent problem to be solved in the current oil field exploitation field. Utility Model Content

[0004] The main purpose of the utility model is to provide a tensioning device for a downhole stratified water injection distributor, so as to at least solve the problem in the prior art that the upper joint and the outer casing of the downhole stratified water injection distributor are not effectively connected, resulting in the upper joint being easily displaced.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a tensioning device for a downhole stratified water injection distributor, comprising: an outer casing, a lower joint, an upper joint, a tensioning ring and a flow pipe; the outer casing is a cylindrical body, and the inner walls at both ends of the outer casing are provided with threads; the outer side wall of the end of the lower joint is provided with threads, and the lower joint is threadedly connected to the first end of the outer casing; a first groove is provided on the end face of the lower joint; the upper joint is arranged at the second end of the outer casing; an annular fixing groove is provided on the side face of the upper joint, the length of the annular fixing groove along the length direction is less than the length of the upper joint, and the edge of the annular fixing groove is not connected to the edge of the upper joint; a second groove is provided on the end face of the upper joint; the tensioning ring is a cylindrical body, and the tensioning ring is sleeved in the annular fixing groove of the upper joint; the outer wall of the tensioning ring is provided with threads, and the tensioning ring is threadedly connected to the second end of the outer casing; the two ends of the flow pipe are respectively arranged in the first groove and the second groove, and the flow pipe is connected to both the lower joint and the upper joint.

[0006] Furthermore, a tensioning device for a downhole stratified water injection distributor also includes: mounting bolts; wherein a raised mounting block is provided at a preset position on the side of the flow pipe, a mounting hole is provided on the mounting block along the length direction of the flow pipe, and a bolt hole corresponding to the mounting hole is provided on the end face of the lower joint; the mounting bolt passes through the mounting hole and is fixed in the bolt hole to fix the flow pipe and the lower joint.

[0007] Furthermore, the tensioning ring includes a first half ring and a second half ring, each side section of the first half ring is provided with a plurality of positioning pins, and each section of the second half ring is provided with a plurality of positioning holes corresponding to the plurality of positioning pins.

[0008] Furthermore, a plurality of process holes are provided on the side surface of the tension ring at preset positions along the circumferential direction close to the end.

[0009] Furthermore, a first protrusion corresponding to the first groove is provided at the first end of the flow tube, and the first protrusion is arranged in the first groove to connect the flow tube and the lower joint; a second protrusion corresponding to the second groove is provided at the second end of the flow tube, and the second protrusion is arranged in the second groove to connect the flow tube and the upper joint.

[0010] The utility model discloses a tensioning device for a downhole stratified water injection distributor, comprising: an outer casing, a lower joint, an upper joint, a tensioning ring and a flow pipe; the outer casing is a cylindrical body, and the inner walls at both ends of the outer casing are provided with threads; the outer side wall of the end of the lower joint is provided with threads, and the lower joint is threadedly connected to the first end of the outer casing; the end face of the lower joint is provided with a first groove; the upper joint is arranged at the second end of the outer casing; the side face of the upper joint is provided with an annular fixing groove, the length of the annular fixing groove along the length direction is less than the length of the upper joint, and the edge of the annular fixing groove is not connected to the edge of the upper joint; the end face of the upper joint is provided with a second groove; the tensioning ring is a cylindrical body, and the tensioning ring is sleeved in the annular fixing groove of the upper joint; the outer wall of the tensioning ring is provided with threads, and the tensioning ring is threadedly connected to the second end of the outer casing; the two ends of the flow pipe are respectively arranged in the first groove and the second groove, and the flow pipe is connected to both the lower joint and the upper joint. The utility model provides a tensioning device for a downhole stratified water injection distributor. By means of a tensioning ring arranged between an upper joint and an outer casing, the upper joint and the outer casing are tightly tightened while ensuring that the upper joint does not rotate axially, thereby improving the stability and service life of the water injection distributor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0012] Figure 1 It is a structural schematic diagram of a tensioning device of a downhole stratified water injection distributor which can be selected according to an embodiment of the utility model;

[0013] Figure 2 It is a structural schematic diagram of a tensioning ring of a tensioning device of a downhole stratified water injection distributor which can be selected according to an embodiment of the utility model;

[0014] Figure 3 It is a cross-sectional view of a tensioning ring of a tensioning device of a downhole stratified water injection distributor which can be selected according to an embodiment of the utility model;

[0015] Figure 4 It is a structural schematic diagram of a flow pipe of a tensioning device of a downhole stratified water injection distributor that can be selected according to an embodiment of the utility model.

[0016] The above drawings include the following reference numerals:

[0017] 10. Outer casing; 20. Lower joint; 30. Upper joint; 40. Tension ring; 41. First half ring; 42. Second half ring; 43. Positioning pin; 44. Process hole; 50. Flow pipe; 51. Mounting block; 60. Mounting bolt. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] The utility model provides a tensioning device for a downhole stratified water injection distributor, such as Figure 1 As shown, it includes: an outer casing 10, a lower joint 20, an upper joint 30, a tightening ring 40 and a flow tube 50; the outer casing 10 is a cylindrical body, and the inner walls of both ends of the outer casing 10 are provided with threads; the outer wall of the end of the lower joint 20 is provided with threads, and the lower joint 20 is threadedly connected to the first end of the outer casing 10; the end surface of the lower joint 20 is provided with a first groove; the upper joint 30 is arranged at the second end of the outer casing 10; the side of the upper joint 30 is provided with an annular fixing groove, and the annular fixing groove is provided along the length direction The length of the upper joint 30 is less than that of the upper joint 30, and the edge of the annular fixing groove does not connect with the edge of the upper joint 30; the end surface of the upper joint 30 is provided with a second groove; the tension ring 40 is a cylindrical body, and the tension ring 40 is sleeved in the annular fixing groove of the upper joint 30; the outer wall of the tension ring 40 is provided with a thread, and the tension ring 40 is threadedly connected to the second end of the outer casing 10; the two ends of the flow pipe 50 are respectively arranged in the first groove and the second groove, and the flow pipe 50 is connected with both the lower joint 20 and the upper joint 30. Since the upper joint 30 cannot have any circumferential rotation during installation and use, a rotatable tension ring 40 is provided to be connected to the upper joint 30 and the outer casing 10 respectively, so that the upper joint 30 can be fixed by rotating the tension ring 40 alone during installation, and the upper joint 30 will only produce horizontal displacement even if it is impacted by water flow during use, which solves the problem that the upper joint and the outer casing of the underground stratified water injection distributor in the prior art are not effectively connected, resulting in the upper joint being easily displaced.

[0020] Furthermore, a downhole stratified water injection distributor tensioning device also includes: a mounting bolt 60; wherein a raised mounting block 51 is provided at a preset position on the side of the flow tube 50, and a mounting hole is provided on the mounting block 51 along the length direction of the flow tube 50, and a bolt hole corresponding to the mounting hole is provided on the end face of the lower joint 20; the mounting bolt 60 passes through the mounting hole and is fixed in the bolt hole to fix the flow tube 50 and the lower joint 20.

[0021] Furthermore, if Figure 2 and Figure 3As shown, the tension ring 40 includes a first half ring 41 and a second half ring 42. A plurality of positioning pins 43 are provided on each side section of the first half ring 41, and a plurality of positioning holes corresponding to the plurality of positioning pins 43 are provided on each section of the second half ring 42. In specific implementation, the processing technology of the tension ring 40 is blanking, turning, drilling, tapping, and cutting. It is particularly pointed out that after the tension ring 40 is processed as a whole, it is evenly divided and cut into two parts, the first half ring 41 and the second half ring 42, in the axial direction, and then connected by the positioning pins 43 when in use.

[0022] Furthermore, a plurality of process holes 44 are provided at preset positions near the end of the side surface of the tension ring 40 along the circumferential direction, and the process holes 44 are used for clamping when tightening the threads during installation. In specific implementation, four process holes 44 are provided.

[0023] Furthermore, if Figure 4 As shown, the first end of the flow tube 50 is provided with a first protrusion corresponding to the first groove, and the first protrusion is arranged in the first groove to connect the flow tube 50 and the lower joint 20; the second end of the flow tube 50 is provided with a second protrusion corresponding to the second groove, and the second protrusion is arranged in the second groove to connect the flow tube 50 and the upper joint 30.

[0024] When the utility model is used, the lower joint 20 is first fixed with a tool, the first protrusion of the flow tube 50 is inserted into the first groove of the lower joint 20, and the two are fixedly connected by installing the bolt 60; then the outer protective tube is connected to the lower joint 20 through a thread; then the first half ring 41 and the second half ring 42 are sleeved in the annular fixing groove of the upper joint 30, so that each positioning pin 43 is inserted into the corresponding positioning hole to form a complete tensioning ring 40; a caliper is extended into the positioning hole to clamp the tensioning ring 40 and then the tensioning ring 40 is threadedly engaged with the outer casing 10. At this time, the upper joint 30 is inserted into the outer casing 10 together with the tensioning ring 40, and the second protrusion of the flow tube 50 is inserted into the second groove of the upper joint 30. Water flows from the upper joint 30 into the flow tube 50 and then flows out from the lower joint 20. During this process, the external thread of the tightening ring 40 and the internal thread of the outer casing 10 are meshed and connected to achieve a tightening effect, thereby solving the problem in the prior art that the upper joint and the outer casing of the downhole stratified water injection distributor are not effectively connected, resulting in the upper joint being easily displaced.

[0025] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tensioning device for underground stratified water injection distributor, characterized in that: include: An outer casing (10), wherein the outer casing (10) is a cylindrical body, and inner walls at both ends of the outer casing (10) are provided with threads; A lower joint (20), wherein the outer side wall of the end of the lower joint (20) is provided with a thread, and the lower joint (20) is threadedly connected to the first end of the outer casing (10); and a first groove is provided on the end surface of the lower joint (20); An upper joint (30), the upper joint (30) being arranged at the second end of the outer casing (10); an annular fixing groove is provided on the side surface of the upper joint (30); the length of the annular fixing groove along the length direction is smaller than the length of the upper joint (30), and the edge of the annular fixing groove does not connect with the edge of the upper joint (30); a second groove is provided on the end surface of the upper joint (30); A tensioning ring (40), the tensioning ring (40) is a cylindrical body, the tensioning ring (40) is sleeved in the annular fixing groove of the upper joint (30); the outer wall of the tensioning ring (40) is provided with a thread, and the tensioning ring (40) is threadedly connected to the second end of the outer casing (10); A flow tube (50), wherein two ends of the flow tube (50) are respectively arranged in the first groove and the second groove, and the flow tube (50) is connected to both the lower joint (20) and the upper joint (30).

2. A tensioning device for underground stratified water injection distributor according to claim 1, characterized in that: The underground stratified water injection water distributor tensioning device also includes: Mounting bolts (60); A raised mounting block (51) is provided at a preset position on the side of the flow tube (50); a mounting hole is provided on the mounting block (51) along the length direction of the flow tube (50); a bolt hole corresponding to the mounting hole is provided on the end surface of the lower joint (20); and the mounting bolt (60) passes through the mounting hole and is fixed in the bolt hole to fix the flow tube (50) and the lower joint (20).

3. The tensioning device for underground stratified water injection distributor according to claim 1, characterized in that: The tensioning ring (40) comprises a first half ring (41) and a second half ring (42), wherein each side section of the first half ring (41) is provided with a plurality of positioning pins (43), and each section of the second half ring (42) is provided with a plurality of positioning holes corresponding one-to-one to the plurality of positioning pins (43).

4. The tensioning device for underground stratified water injection distributor according to claim 1, characterized in that: A plurality of process holes (44) are provided on the side surface of the tension ring (40) at preset positions along the circumferential direction close to the end.

5. The tensioning device for underground stratified water injection distributor according to claim 1, characterized in that: The first end of the flow tube (50) is provided with a first protrusion corresponding to the first groove, and the first protrusion is arranged in the first groove to connect the flow tube (50) and the lower joint (20); the second end of the flow tube (50) is provided with a second protrusion corresponding to the second groove, and the second protrusion is arranged in the second groove to connect the flow tube (50) and the upper joint (30).

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