Large-displacement tubing pump and construction well

Abstract

The utility model provides a large displacement tubing pump, which comprises a pump cylinder and an oil pumping mechanism concentrically arranged in the pump cylinder, the oil pumping mechanism comprises an oil pumping rod, a plunger arranged below the oil pumping rod and a disconnector arranged between the oil pumping rod and the plunger, the pump cylinder comprises a first pump cylinder section and a second pump cylinder section which are arranged in a spaced mode, and an anti-clamping short section which is arranged between the first pump cylinder section and the second pump cylinder section and allows the plunger to enter.

Description

Technical Field

[0001] The utility model relates to the field of petroleum production machinery, in particular to a large-displacement tubular pump and a construction well. Background Art

[0002] Large displacement tubular pump (95 / 105 / 120) is mainly composed of pump barrel, plunger, fixed valve, floating valve, disconnector, etc. The plunger and pump barrel are first hung to the depth along with the tubing pump, and then the sucker rod with disconnector is lowered into the connection plunger. It is widely used in large displacement production of liquid lifting wells.

[0003] The large-displacement tubular pump (95 / 105 / 120) in the prior art has the following problems: 1) Since the pump has a large displacement and a fast flow rate, it will not get stuck with sand or foreign matter during the production process. However, the pump needs to be shut down for maintenance of the pumping unit, replacement of the rod, and adjustment of the working system, which can easily cause problems such as sand burial and sand jamming; 2) When the pump gets stuck, it is impossible to determine whether it is stuck due to the matching gap or the collision between the plunger and the oil pipe; 3) When the oil production management area replaces the rod, the disconnector needs to be disconnected, and after the rod is replaced, the disconnector needs to be reconnected. Due to factors such as lack of experience, it is very easy to make the disconnector difficult to connect / cannot connect.

[0004] Therefore, it is desired in the art to provide a large-displacement tubular pump, which can prevent sand burial and pump jam and simplify the operation process by improving the tubular pump. Utility Model Content

[0005] The utility model aims to provide a large-displacement tubular pump, which can prevent sand burial and sand jam during shutdown. In addition, a construction well is also provided.

[0006] According to a first aspect of the utility model, there is provided a large displacement tube pump, comprising a pump barrel, and

[0007] An oil pumping mechanism is concentrically arranged in the pump barrel, the oil pumping mechanism comprising a sucker rod, a plunger arranged below the sucker rod, and a disconnector arranged between the sucker rod and the plunger.

[0008] The pump barrel comprises a first pump barrel section and a second pump barrel section which are arranged at intervals, and an anti-stuck nipple which is arranged between the first pump barrel section and the second pump barrel section and allows the plunger to enter.

[0009] In one embodiment, the inner diameter of the anti-sticking nipple is larger than the inner diameter of the pump barrel, and an annular chamber allowing liquid to pass through is formed between the plunger and the anti-sticking nipple after the plunger moves upward.

[0010] In one embodiment, the length of the anti-stick nipple is in the range of three-fifths to four-fifths of the length of the second pump barrel section.

[0011] In one embodiment, the length of the anti-sticking nipple is 2.5 to 5.5 times the length of the plunger.

[0012] In one embodiment, a release joint extending radially inwardly and adapted to be matched with the disconnector is formed at a junction between the first pump barrel segment and the anti-sticking nipple.

[0013] In one embodiment, the plunger comprises the oil inlet portion which is configured in a cylindrical form and is used to form a sealed connection with the second pump barrel section, and two oil outlet valves which are spaced apart are provided in the oil inlet portion.

[0014] In one embodiment, a first limiting portion is provided between the two oil outlet valves, and the first limiting portion includes a first limiting plate located in the middle and used to limit the movement path of the ball, and a plurality of first wing ribs arranged at intervals between the first limiting plate and the inner wall of the oil inlet part.

[0015] In one embodiment, the plunger further comprises an oil outlet portion configured in a conical form and located above the oil inlet portion, and a plurality of oil outlets arranged at intervals are provided along the circumference of the oil outlet portion.

[0016] The plunger further includes a connecting rod disposed between the disconnector and the oil outlet portion.

[0017] In one embodiment, a plurality of groups of oil inlet assemblies spaced apart along the axial direction are provided in the second pump barrel section.

[0018] The oil inlet assembly includes an oil inlet valve and a second limiting portion arranged above the oil inlet valve, wherein the second limiting portion includes a second limiting plate located in the middle and used to limit the movement path of the ball, and a plurality of second ribs arranged at intervals between the second limiting plate and the inner wall of the second pump barrel section.

[0019] According to the second aspect of the utility model, a construction well is provided, comprising a large-displacement tubular pump as described above, an oil pipe arranged above the pump barrel, and a bare rod detachably connected to the top end of the sucker rod, wherein the bare rod is fully extended from the oil pipe when the plunger enters the anti-stuck short joint.

[0020] Compared with the prior art, the advantages of the utility model are:

[0021] Firstly, the utility model can prevent sand burial and sand jamming during shutdown operation.

[0022] In the present invention, when a large-displacement tubular pump needs to be shut down for maintenance, replacement of bare rods, adjustment of working system, etc., the plunger is usually lifted up and temporarily stored in the anti-stuck short section. At this time, due to the presence of an annular chamber between the plunger and the anti-stuck short section, sand burial and sand jam can be effectively prevented. In other words, when the plunger is lifted up into the anti-stuck short section, the second pump barrel section will be filled with oil, and the sand will not appear in the annular chamber between the plunger and the anti-stuck short section after sedimentation, thereby effectively preventing sand burial and sand jam.

[0023] Second, the utility model can still replace the polished rod without disconnecting the disconnector.

[0024] Compared with ordinary pumps, the utility model has an anti-stuck short joint, so that the axial movement distance of the plunger is longer, so that the polished rod installed at the top of the sucker rod can be more easily extended from the oil pipe. Therefore, the utility model can smoothly replace the polished rod without disconnecting the disconnector, so as to further improve the working efficiency of the large-displacement tube pump.

[0025] Thirdly, the utility model can more easily determine the cause of pump jam (matching clearance jam or plunger and oil pipe collision jam).

[0026] On the one hand, after the plunger is lifted into the anti-stuck short joint, the second pump barrel section will be filled with oil, and after sedimentation, sand will not appear in the annular chamber between the plunger and the anti-stuck short joint. Therefore, this large-displacement tubular pump can effectively avoid the situation of fitting gap jamming; on the other hand, the utility model extends the axial movable distance of the plunger (that is, the total length of the anti-stuck short joint and the second pump barrel section). Therefore, when the pump is jammed, the plunger and the oil pipe can be suspended by a crane and a pumping unit to avoid collision and jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0028] Figure 1 The schematic diagram shows the upstroke state of the large-displacement tubular pump according to the utility model;

[0029] Figure 2 The schematic diagram shows the downstroke state of the large-displacement tubular pump according to the utility model;

[0030] Figure 3 The schematic diagram shows the positional relationship between the plunger and the anti-sticking nipple during backwashing of a large-displacement tubular pump according to the utility model;

[0031] Figure 4 The diagram schematically shows the disengaged state of the large-displacement tube pump according to the present invention.

[0032] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0033] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0034] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0035] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0036] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] The utility model will be further described below in conjunction with the accompanying drawings.

[0038] Figure 1 The schematic diagram shows the upstroke state of the large displacement tube pump 100 according to the present invention;

[0039] Figure 2 The schematic diagram shows the downstroke state of the large-displacement tube pump 100 according to the present invention.

[0040] like Figure 1 and 2 As shown, according to the first aspect of the utility model, a large displacement tube pump 100 is provided, which includes a pump barrel and an oil pumping mechanism. The oil pumping mechanism is concentrically arranged in the pump barrel and includes a sucker rod 21, a plunger 22 arranged below the sucker rod 21, and a disconnector 23 arranged between the sucker rod 21 and the plunger 22.

[0041] Preferably, the disconnector 23 includes an upper disconnector assembly 231 fixed at the bottom end of the sucker rod 21, and a lower disconnector assembly 232 fixed at the top end of the plunger 22. In the present invention, the upper disconnector assembly 231 and the lower disconnector assembly 232 can be effectively engaged to facilitate a firm connection between the sucker rod 21 and the plunger 22, and the disconnector 23 can also be separated under the action of a release joint 14 (described below) when necessary to help completely separate the sucker rod 21 from the plunger 22.

[0042] According to the utility model, if Figures 1-2 As shown, the pump barrel includes a first pump barrel section 11, a second pump barrel section 12 and an anti-stuck short section 13. Preferably, the first pump barrel section 11 and the second pump barrel section 12 are arranged at intervals, and the first pump barrel section 11 is arranged at the upper part, and the second pump barrel section 12 is arranged at the lower part.

[0043] Accordingly, the anti-stuck short section 13 is fixedly installed between the first pump barrel section 11 and the second pump barrel section 12, and after a subsequent shutdown, the plunger 22 can enter the anti-stuck short section 13 to help prevent sand burial and sand jamming, thereby further improving the safety and stability of the large-displacement tube pump 100.

[0044] Figure 3 The schematic diagram shows the positional relationship between the plunger 22 and the anti-sticking nipple 13 during backwashing of a well by a large-displacement tubular pump 100 according to the present invention.

[0045] In one embodiment, the inner diameter of the anti-stuck nipple 13 is larger than the inner diameter of the pump barrel. Therefore, when the plunger 22 moves upward and enters the anti-stuck nipple 13, an annular chamber 101 is formed between the plunger 22 and the anti-stuck nipple 13. Preferably, the annular chamber 101 can allow liquid to move from bottom to top, so as to facilitate the subsequent smooth operation. Figure 3 Backwashing operation shown.

[0046] In the utility model, when the large-displacement tubular pump 100 needs to be shut down for maintenance, replacement of bare rods, adjustment of working system, etc., the plunger 22 is usually lifted up and temporarily stored in the anti-stuck short section 13. At this time, due to the presence of the annular chamber 101 between the plunger 22 and the anti-stuck short section 13, sand burial and sand jamming can be effectively prevented.

[0047] In other words, when the plunger 22 is lifted up into the anti-stuck short section 13, the second pump barrel section 12 will be filled with oil, and after sedimentation, sand will not appear in the annular chamber 101 between the plunger 22 and the anti-stuck short section 13, thereby effectively preventing sand burial and sand jam.

[0048] In one embodiment, the length of the anti-sticking nipple 13 is in the range of three-fifths to four-fifths of the length of the second pump barrel section 12. In the present invention, the anti-sticking nipple 13 can play the role of temporarily storing the plunger 22, so that the large-displacement tubular pump 100 can effectively prevent sand burial and sand sticking when the machine is shut down.

[0049] In the present utility model, the length of the anti-stuck short section 13 is 3 to 5 m; the length of the second pump barrel section is 5 to 9 m.

[0050] In addition, compared with ordinary pumps, the utility model has an additional anti-stuck short section 13, so that the axial movement distance of the plunger 22 is longer, so that the polished rod (not shown, described below) installed at the top of the sucker rod 21 can be more easily extended from the oil pipe (not shown, described below). Therefore, the utility model can smoothly replace the polished rod without disconnecting the disconnector 23, so as to further improve the working efficiency of the large-displacement tube pump 100.

[0051] In addition, because the oil production management area in the prior art usually has to disconnect the disconnector first when replacing the light rod, and then reconnect the disconnector after replacing the light rod, such a complicated operation is very likely to cause difficulty or failure in docking the disconnector for the operator, thus affecting the work progress.

[0052] As can be seen from the above, the present application extends the axial movable distance of the plunger 22 so that the light rod installed at the top of the sucker rod 21 can be more easily extended from the oil pipe, thereby facilitating the subsequent replacement of the light rod without disconnecting the disconnector 23.

[0053] Preferably, the utility model extends the axial movable distance of the plunger 22 (i.e., the total length of the anti-stuck nipple and the second pump barrel section 12), so that when a pump jam occurs, the plunger 22 can be prevented from colliding with the oil pipe by suspending the pump with a crane and a pumping unit.

[0054] In one embodiment, the length of the anti-stuck short section 13 is 2.5 to 5.5 times the length of the plunger 22, and the length of the anti-stuck short section 13 is greater than the total length of the plunger 22 and the disconnector 23. Therefore, the plunger 22 can completely enter the anti-stuck short section 13, and it can not only be temporarily stored in the anti-stuck short section 13 after shutdown to prevent sand burial and sand jam, but also can move over a longer distance to facilitate the subsequent replacement of the polished rod.

[0055] Preferably, the length of the plunger 22 is 0.9-1.2 m.

[0056] Figure 4 The diagram schematically shows the disengaged state of the large-displacement tube pump 100 according to the present invention.

[0057] In one embodiment, Figure 1 , 2 As shown in FIG. 4 , a release joint 14 extending radially inward is formed at the joint of the first pump barrel section 11 and the anti-stuck short section 13. Preferably, the disconnector 23 can be separated under the action of the release joint 14 to form a disconnector upper assembly 231 and a disconnector lower assembly 232. In other words, the release joint 14 can enable the sucker rod 21 and the plunger 22 to realize the following operation according to the actual situation. Figure 4 Disengaged state shown.

[0058] According to the utility model, if Figures 1-2 As shown, the plunger 22 includes an oil inlet portion 31 configured in a cylindrical form. Preferably, two oil outlet valves 32 are arranged at intervals in the oil inlet portion 31, and the outer peripheral surface of the oil inlet portion 31 can form a sealed connection with the inner peripheral surface of the second pump barrel section 12, thereby ensuring that the extracted oil can enter the plunger 22 only through the oil outlet valve 32.

[0059] In one embodiment, Figures 1-2 As shown, a first limiting portion is provided between the two oil outlet valves 32. Preferably, the first limiting portion includes a first limiting plate 33 in the middle for limiting the movement path of the ball, and a plurality of first ribs (not shown) arranged at intervals between the first limiting plate 33 and the inner wall of the oil inlet portion 31.

[0060] In the present invention, the first rib can ensure the firmness of the first limit plate 33 in the oil inlet part 31, and the cooperation between the first limit plate 33 and the oil outlet valve 32 can help the oil pumping work in the well. In addition, in this way, the movement range of the ball can be effectively limited to ensure that the large-displacement tube pump 100 can work smoothly in the well, so as to further improve its service life.

[0061] In one embodiment, Figures 1-2 As shown, the plunger 22 also includes an oil outlet portion 41 configured in a conical form. Preferably, the oil outlet portion 41 is located above the oil inlet portion 31, and a plurality of oil outlets 42 arranged at intervals are provided along the circumference of the oil outlet portion 41, so that the oil can be smoothly guided to flow upward.

[0062] Preferably, if Figures 1-2 As shown, the plunger 22 also includes a connecting rod 43 disposed between the disconnector 23 and the oil outlet portion 41. In this way, a firm connection relationship can be provided between the disconnector 23 and the plunger 22 to further ensure that the large-displacement tube pump 100 can smoothly pump oil underground.

[0063] In one embodiment, Figures 1-2As shown, a plurality of groups of oil inlet assemblies arranged at intervals along the axial direction are provided in the second pump barrel section 12. Preferably, the oil inlet assembly includes an oil inlet valve 51 and a second limit portion arranged above the oil inlet valve 51, wherein the second limit portion includes a second limit plate 52 located in the middle and used to limit the movement path of the ball, and a plurality of second ribs (not shown) arranged at intervals between the second limit plate 52 and the inner wall of the second pump barrel section 12.

[0064] In the present invention, the second rib can ensure the firmness of the second limit plate 52 in the second pump barrel section 12, and the cooperation between the second limit plate 52 and the oil inlet valve 51 can help the downhole oil pumping work. In addition, in this way, the movement range of the ball can be effectively limited to ensure that the large-displacement tube pump 100 can work smoothly downhole, thereby further improving its service life.

[0065] According to the second aspect of the utility model, a construction well is provided, which includes a large-displacement tubular pump 100 as described above, an oil pipe (not shown) arranged above the pump barrel, and a bare rod (not shown) detachably connected to the top end of the sucker rod 21.

[0066] It is worth noting that when the plunger 22 enters the anti-stuck short section 13, the polished rod can be extended from the oil pipe. Therefore, the utility model can smoothly replace the polished rod without disconnecting the disconnector 23, so as to further improve the working efficiency of the large-displacement tube pump 100. Compared with the prior art, the utility model can help operators to operate, thereby effectively avoiding the situation that the work progress is affected by the difficulty or failure of the disconnector to dock.

[0067] Preferably, currently large-displacement tubular pumps (95 / 105 / 120) are used in large quantities, so improving the process of large-displacement tubular pumps can effectively prevent pump jams, simplify the process of replacing bare rods in the production process, and has a very broad application prospect.

[0068] Compared with the prior art, the advantages of the present invention are:

[0069] Firstly, the utility model can prevent sand burial and sand jamming during shutdown operation.

[0070] In the present invention, when the large-displacement tubular pump 100 needs to be shut down for maintenance, replacement of bare rods, adjustment of working system, etc., the plunger 22 is usually lifted up and temporarily stored in the anti-stuck short section 13. At this time, due to the presence of the annular chamber 101 between the plunger 22 and the anti-stuck short section 13, sand burial and sand jam can be effectively prevented. In other words, when the plunger 22 is lifted up into the anti-stuck short section 13, the second pump barrel section 12 will be filled with oil, and the sand will not appear in the annular chamber 101 between the plunger 22 and the anti-stuck short section 13 after sedimentation, thereby effectively preventing sand burial and sand jam.

[0071] Second, the utility model can still replace the polished rod without disconnecting the disengaging device 23.

[0072] Compared with ordinary pumps, the utility model has an anti-stuck short section 13, so that the axial movement distance of the plunger 22 is longer, so that the polished rod installed at the top of the sucker rod 21 can be more easily extended from the oil pipe. Therefore, the utility model can smoothly replace the polished rod without disconnecting the disconnector 23, so as to further improve the working efficiency of the large-displacement tube pump 100.

[0073] Thirdly, the utility model can more easily determine the cause of pump jam (jamming clearance jam or collision jam between the plunger 22 and the oil pipe).

[0074] On the one hand, after the plunger 22 is lifted into the anti-stuck short section 13, the second pump barrel section 12 will be filled with oil, and the sand will not appear in the annular chamber 101 between the plunger 22 and the anti-stuck short section 13 after sedimentation. Therefore, the large-displacement tubular pump 100 can effectively avoid the situation of fitting gap jamming; on the other hand, the utility model extends the axial movable distance of the plunger 22 (that is, the total length of the anti-stuck short section and the second pump barrel section 12). Therefore, when the pump is jammed, the plunger 22 can be suspended by a crane and a pumping unit to avoid the jamming of the oil pipe.

[0075] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A large displacement tube pump, comprising: Pump barrel, and An oil pumping mechanism is concentrically arranged in the pump barrel, the oil pumping mechanism comprising an oil pumping rod (21), a plunger (22) arranged below the oil pumping rod (21), and a disconnector (23) arranged between the oil pumping rod (21) and the plunger (22), The pump barrel comprises a first pump barrel section (11) and a second pump barrel section (12) arranged at intervals, and an anti-stuck short section (13) arranged between the first pump barrel section (11) and the second pump barrel section (12) and allowing the plunger (22) to enter.

2. The large displacement tube pump according to claim 1, characterized in that: The inner diameter of the anti-sticking short joint (13) is larger than the inner diameter of the pump barrel, and an annular chamber (101) that allows liquid to pass through is formed between the plunger (22) and the anti-sticking short joint (13) after the plunger (22) moves upward.

3. The large displacement tube pump according to claim 2, characterized in that: The length of the anti-sticking nipple (13) is in the range of three-fifths to four-fifths of the length of the second pump barrel section (12).

4. The large displacement tube pump according to claim 3, characterized in that: The length of the anti-stuck short section (13) is 2.5 to 5.5 times the length of the plunger (22).

5. The large displacement tube pump according to claim 4, characterized in that: A release joint (14) extending radially inwards and adapted to be matched with the disconnector (23) is formed at the joint between the first pump barrel section (11) and the anti-stuck short joint (13).

6. A large displacement tube pump according to any one of claims 1 to 5, characterized in that: The plunger (22) comprises an oil inlet portion (31) which is constructed in a cylindrical form and is used to form a sealed connection with the second pump barrel section (12), and two oil outlet valves (32) are arranged at intervals in the oil inlet portion (31).

7. The large displacement tube pump according to claim 6, characterized in that: A first limiting portion is provided between the two oil outlet valves (32), the first limiting portion comprising a first limiting plate (33) located in the middle and used to limit the movement path of the ball, and a plurality of first ribs arranged at intervals between the first limiting plate (33) and the inner wall of the oil inlet portion (31).

8. The large displacement tube pump according to claim 7, characterized in that: The plunger (22) further comprises an oil outlet portion (41) configured in a conical form and located above the oil inlet portion (31), and a plurality of oil outlet ports (42) arranged at intervals are provided along the circumference of the oil outlet portion (41). The plunger (22) further includes a connecting rod (43) disposed between the disconnector (23) and the oil outlet portion (41).

9. A large displacement tube pump according to any one of claims 1 to 5, characterized in that: A plurality of groups of oil inlet components are arranged in an axially spaced manner in the second pump barrel section (12). The oil inlet assembly includes an oil inlet valve (51) and a second limiting portion arranged above the oil inlet valve (51), wherein the second limiting portion includes a second limiting plate (52) located in the middle and used to limit the movement path of the ball, and a plurality of second ribs arranged at intervals between the second limiting plate (52) and the inner wall of the second pump barrel section (12).

10. A construction well, comprising a large-displacement tubular pump according to any one of claims 1 to 9, an oil pipe arranged above the pump barrel, and a polished rod detachably connected to the top end of the sucker rod (21), wherein: When the plunger (22) enters the anti-stuck nipple (13), the polished rod extends from the oil pipe.

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