Combined tubular column gas well steel wire bailing and draining tool

Abstract

The utility model provides a combined tubular column gas well steel wire bailing drainage tool, which comprises a cross-core swab, a conventional swab, a cross-core connecting tool and a steel wire, the cross-core swab is matched with a large-size oil pipe in a combined tubular column, and the cross-core connecting tool and the conventional swab are matched with a small-size oil pipe in the combined tubular column; the lower end of the cross-core connecting tool is connected with the upper end of the conventional puller, and the upper end of the cross-core connecting tool is connected with the lower end of the cross-core puller; one end of the steel wire penetrates through the center penetrating puller and is connected with the center penetrating connecting tool; the bailing and liquid discharging tool provided by the utility model can realize bailing and liquid discharging of the combined tubular column, and effectively solves the problem that the conventional bailing and liquid discharging tool cannot perform bailing and liquid discharging on the combined tubular column.

Description

Technical Field

[0001] The utility model belongs to the field of natural gas well drainage and gas production engineering, and relates to a combined pipe column gas well wire lifting and drainage tool. Background Art

[0002] In natural gas extraction, as the pressure of gas reservoir wells and natural gas production decrease, the production cannot meet the critical liquid carrying flow rate, and the produced water or condensate will gradually remain at the bottom of the well to form liquid accumulation. The increasing liquid accumulation at the bottom of the well will seriously affect the gas production efficiency, and some wells with serious liquid accumulation cannot produce normally.

[0003] At present, the main technologies suitable for resuming production of shut-in wells with severe fluid accumulation include jet pumps, mechanical pumping, electric submersible pumps, nitrogen gas lift, and wireline fishing. The strong drainage technology of jet pumps, mechanical pumping, and electric submersible pumps is limited by various aspects of the wellbore and has not been widely promoted and applied. Among them, the success rate of nitrogen gas lift is relatively low. The wireline fishing drainage technology is gradually maturing and is gradually replacing nitrogen gas lift and other drainage measures. It is a cost-effective, safe and reliable measure. However, the current wireline fishing tool cannot be used to remove the combined tubing string (the lower half of the tubing is 2 7 / 8 oil pipe, the upper part is 3 1 / 2 oil pipe) for fishing and drainage. This is because the existing wire fishing tools only have one specification of puller, which cannot be used to fish out and drain large-sized oil pipes in the combined pipe string. Therefore, further research on combined pipe string fishing tools is needed. Summary of the Invention

[0004] The purpose of the utility model is to provide a combined pipe string gas well wire fishing and drainage tool, which solves the defect of poor effect in the prior art method for fishing and draining the combined pipe string.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides a combined pipe string gas well wire fishing and drainage tool, which includes a core puller, a conventional puller, a core connection tool and a steel wire, wherein the core puller cooperates with the large-size oil pipe in the combined pipe string, and the core connection tool and the conventional puller cooperate with the small-size oil pipe in the combined pipe string;

[0007] The lower end of the through-hole connecting tool is connected to the upper end of the conventional drawer, and the upper end of the through-hole connecting tool is connected to the lower end of the through-hole drawer; one end of the steel wire passes through the through-hole drawer and is connected to the through-hole connecting tool.

[0008] Preferably, the through-draw is connected to the through-connection tool by snap-fitting.

[0009] Preferably, the conventional drawer is threadedly connected to the through-hole connection tool.

[0010] Preferably, the through-draw comprises a conventional drawer body, an axially arranged central through hole is provided on the conventional drawer body, and the steel wire passes through the central through hole to be connected with the through-draw connection tool.

[0011] Preferably, grooves arranged in a circumferential direction are provided on the inner wall of the lower end of the conventional drawer body, and the grooves cooperate with the locking blocks mounted on the outer wall of the upper end of the through-hole connecting tool.

[0012] Preferably, copper cores are provided at both ends of the central through hole.

[0013] Preferably, the through-hole connection tool includes a spring pressure cap, a locking block, an auxiliary spring, a spring, a slip, an outer cone sleeve, an inner cone sleeve, a pressure cap and a lower fishing diameter, wherein:

[0014] An auxiliary spring and a spring pressure cap are provided in the upper inner cavity of the slip, and the spring pressure cap is placed on the upper end of the auxiliary spring to achieve position limiting and fixing of the auxiliary spring;

[0015] The upper side wall of the slip is provided with a circumferentially arranged opening, in which a locking block is installed. The locking block is sleeved on the outer wall of the spring pressure cap; the locking block cooperates with the groove provided at the lower end of the through-hole drawer;

[0016] An inner cone sleeve is provided in the inner cavity of the middle section of the slip, an outer cone sleeve is sleeved on the outer wall of the inner cone sleeve, a pressure cap is provided at the lower end of the inner cone sleeve, and the outer cone sleeve is fixedly connected to the pressure cap;

[0017] A lower fishing neck is provided in the inner cavity at the lower end of the slip, and the bottom of the lower fishing neck is connected to a conventional drawer;

[0018] The steel wire passes through the slips, the inner cone sleeve and the pressure cap in sequence and is connected with the lower fishing neck.

[0019] Preferably, a screw hole is provided on the side wall of the lower end of the through-draw, the screw hole is connected to the slide groove provided on the outer wall of the slip, a top screw is installed in the screw hole, and a steel ball is provided between the top screw and the slide groove.

[0020] Preferably, the side wall of the chute close to the upper end of the slip is an inclined surface to facilitate the sliding of the steel ball.

[0021] Preferably, the locking block is adhered to the opening by grease.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The utility model provides a combined pipe string gas well wire lifting and drainage tool, which is lowered into the combined pipe string. When the whole tool passes through the connection between the large-size oil pipe and the small-size oil pipe, the core pump stays at the large-size oil pipe, the core connecting tool and the conventional pump continue to descend into the small-size oil pipe, and when they reach the position where the lifting and drainage is required, the steel wire is lifted up, and the conventional pump plays the role of sucking and draining the fluid. When the lifting and drainage of the small-size oil pipe in the combined pipe string is completed, there is no need to replace the equipment, only the core connecting tool and the conventional pump need to be lifted upward by the steel wire, so that the core connecting tool and the core pump are connected by a card. At this time, the large-size oil pipe in the combined pipe string is lifted and drained by the core pump by pulling the steel wire. Therefore, the lifting and drainage tool provided by the utility model can realize the lifting and drainage of the combined pipe string, which effectively solves the problem that the existing lifting and drainage tools cannot lift and drain the combined pipe string. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the combined string structure;

[0025] Figure 2 This is a schematic structural diagram of a lifting and draining tool according to an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the assembly between the through-draw and the through-connection tool according to an embodiment of the present invention;

[0027] Among them, 1, 3 1 / 2 through-hole draw, 2, 2 7 / 8 conventional drawer, 3, through-hole connection tool; 4, steel wire; 5, 3 1 / 2 oil pipe; 6, 2 7 / 8 oil pipe; 31. Spring pressure cap; 32. Auxiliary spring; 33. Lock block; 34. Spring; 35. Slip; 36. Outer cone sleeve; 37. Inner cone sleeve; 38. Pressure cap; 39. Lower salvage diameter. DETAILED DESCRIPTION

[0028] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0029] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0030] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0031] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0032] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0033] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0034] Example 1

[0035] This embodiment provides a combined string gas well wireline fishing and drainage tool, comprising a core puller, a conventional puller, a core connection tool, and a steel wire, wherein the core puller cooperates with the large-size oil tubing in the combined string, and the conventional puller cooperates with the small-size oil tubing in the combined string;

[0036] The lower end of the through-hole connection tool is connected to the upper end of the conventional drawer, and the upper end of the through-hole connection tool is connected to the lower end of the through-hole drawer 1;

[0037] One end of the steel wire passes through the through-hole drawer and is connected to the through-hole connecting tool.

[0038] In this embodiment, when the combined tubing is lifted and drained, the entire tool passes through the connection between the large-size oil pipe and the small-size oil pipe, the through-hole drawer stays at the oil pipe, and the through-hole connection tool and the conventional drawer continue to descend to the small-size oil pipe. When they reach the position where lifting and drainage is required, the steel wire is pulled up, and the conventional drawer plays the role of sucking and draining. When the lifting and drainage of the small-size oil pipes in the combined tubing is completed, there is no need to replace the equipment. It is only necessary to lift the through-hole connection tool and the conventional drawer upwards by the steel wire to connect the through-hole connection tool and the through-hole drawer. At this time, by pulling the steel wire, the through-hole drawer is used to lift and drain the large-size oil pipe in the combined tubing. Therefore, the lifting and drainage tool provided by this embodiment can realize the lifting and drainage of the combined tubing, effectively solving the problem that the existing lifting and drainage tools cannot lift and drain the combined tubing.

[0039] Example 2

[0040] like Figure 1 、 Figure 2 As shown, this embodiment provides a combined pipe string gas well wire fishing and drainage tool to expand the application range of wire fishing and drainage technology, specifically including 3 1 / 2 Through-hole drawers 1, 2 7 / 8 Conventional drawer 2, through-hole connection tool 3 and steel wire 4, including:

[0041] 3 1 / 2 Through-hole drawers 1 and 2 7 / 8The conventional drawers 2 are connected via a through-hole connection tool 3.

[0042] One end of the steel wire 4 passes through 3 1 / 2 The through-hole drawer 1 is connected to the through-hole connecting tool 3.

[0043] The technical principle of this embodiment is:

[0044] When the lifting and draining tool of this embodiment is lowered into the combined pipe string, the entire tool passes through 3 1 / 2 oil pipe with 2 7 / 8 oil pipe connection, 3 1 / 2Through the heart 1 stays at 3 1 / 2 oil pipe, through-hole connection tools 3 and 2 7 / 8 Regular draw 2 continues down to 2 7 / 8In the oil pipe, when it reaches the position where the liquid needs to be drained, lift the wire upwards, 2 7 / 8 Conventional pump 2 is used to suck and drain the fluid. When the small and medium-sized tubing in the combined string is lifted and drained, there is no need to replace the equipment. You only need to lift the through-hole connection tool and the conventional pump upwards with the steel wire so that the through-hole connection tool and the conventional pump are connected. 1 / 2 through the core puller 1 to achieve the card connection, at this time, by pulling the wire, using 3 1 / 2 The core-penetrating puller 1 is used to lift and drain the large-sized oil pipes in the combined tubing string. Therefore, the lifting and draining tool provided in this embodiment can realize the lifting and draining of the combined tubing string, effectively solving the problem that the existing lifting and draining tools cannot lift and drain the combined tubing string.

[0045] Example 3

[0046] Based on Example 2, this embodiment provides a combined pipe string gas well wire fishing and drainage tool, wherein the 3 1 / 2 The through-hole drawer includes a conventional drawer body, on which an axially arranged central through hole is opened, and the steel wire passes through the central through hole and is connected to the through-hole connecting tool 3.

[0047] Copper cores are installed at both ends of the cavity structure.

[0048] In this embodiment, the steel wire 4 passes through 3 1 / 2 A copper core is provided in the central through hole of the through-hole drawer 1 to prevent the steel wire from being worn.

[0049] Example 3

[0050] Based on Example 1, this embodiment provides a combined pipe string gas well wire fishing and drainage tool, the 3 1 / 2 The through-hole drawer 1 and the through-hole connecting tool 3 are clamped and sealed.

[0051] Specifically, the 3 1 / 2 A groove is provided on the inner wall of the lower end of the through-draw 1, and the groove is arranged along the circumferential direction; a locking block is provided on the outer wall of the upper end of the through-draw 3, and the locking block cooperates with the groove to realize the clamping connection between the through-draw and the through-draw 3.

[0052] Example 4

[0053] Based on Example 1, this embodiment provides a combined pipe string gas well wire fishing and drainage tool, the 2 7 / 8The conventional drawer 2 is a commonly used drawer and is connected to the through-hole connection tool 3 by a threaded connection.

[0054] Example 5

[0055] like Figure 3As shown, based on Example 1, this embodiment provides a combined pipe string gas well wire fishing and drainage tool, wherein the through-core connection tool 3 includes a spring pressure cap 31, a locking block 32, an auxiliary spring 33, a spring 34, a slip 35, an outer cone sleeve 36, an inner cone sleeve 37, a pressure cap 38 and a lower fishing diameter 39, wherein:

[0056] An auxiliary spring 32 and a spring pressure cap 31 are provided in the upper inner cavity of the slip 35 . The spring pressure cap 31 is placed on the upper end of the auxiliary spring 32 to limit and fix the auxiliary spring 32 .

[0057] The upper side wall of the slip 35 is provided with circumferentially arranged openings, in which locking blocks 33 are installed. The locking blocks 33 are sleeved on the outer wall of the spring pressure cap 31 .

[0058] The locking block 33 is adhered to the opening by means of grease.

[0059] The locking block 33 cooperates with the groove formed at the lower end of the through-draw.

[0060] An inner cone sleeve 37 is provided in the middle inner cavity of the slip 35 , an outer cone sleeve 36 is sleeved on the outer wall of the inner cone sleeve 37 , a pressure cap 38 is provided at the lower end of the inner cone sleeve 37 , and the outer cone sleeve 36 is fixedly connected to the pressure cap 38 .

[0061] A lower fishing neck 39 is provided in the inner cavity at the lower end of the slip 35 .

[0062] The steel wire passes through the slip 35, the inner cone sleeve 37 and the pressure cap 38 in sequence and is connected to the lower fishing neck 39.

[0063] The bottom of the lower fishing neck 39 is connected to the 7 / 8 Conventional drawer 2 connection.

[0064] 3 1 / 2 A screw hole is provided on the side wall at the lower end of the through-hole drawer 1, and the screw hole is connected to the slide groove provided on the outer wall of the slip 35. A top screw is installed in the screw hole, and a steel ball is provided between the top screw and the slide groove.

[0065] The side wall of the chute close to the upper end of the slip is an inclined surface, which is convenient for the sliding of the steel ball.

[0066] In this embodiment, when the lifting and draining tool is lowered into the combined pipe string, 1 / 2 oil pipe with 2 7 / 8 oil pipe connection, 3 1 / 2Through the heart 1 stays at 3 1 / 2 oil pipe, and the through-core connection tool 3 moves downward under the action of its own weight. At this time, the steel ball moves along the slide groove on the slip 35 until it moves to the outer wall of the slip. The outer wall of the slip pushes the steel ball upward, and then lifts the top screw to achieve the connection between the through-core connection tool and the through-core drawer; finally, the through-core connection tool and 2 7 / 8 The conventional pump continues to move downward until it reaches the position where the liquid needs to be drained, and the wire is lifted. 7 / 8 Conventional pump 2 is used to suck and drain the fluid. When the small and medium-sized tubing in the combined string is lifted and drained, there is no need to replace the equipment. You only need to lift the through-hole connection tool and the conventional pump upwards with the steel wire so that the through-hole connection tool and the conventional pump are connected. 1 / 2 through the core puller 1 to achieve the card connection, at this time, by pulling the wire, using 3 1 / 2 The core-penetrating puller 1 is used to lift and drain the large-sized oil pipes in the combined tubing string. Therefore, the lifting and draining tool provided in this embodiment can realize the lifting and draining of the combined tubing string, effectively solving the problem that the existing lifting and draining tools cannot lift and drain the combined tubing string.

[0067] Example 6

[0068] Based on Example 1, this embodiment provides a combined tubing string gas well wire lifting and drainage tool, in which the outer wall of the spring pressure cap 31 is provided with a circumferentially arranged card groove, the purpose of providing the card groove is to install the locking block 33 at the opening on the slip 35.

[0069] Specifically, before installing the spring pressure cap 31, the locking block 33 is mounted on the spring pressure cap 31, and the locking block 33 is placed in the slot. After the spring pressure cap 31 is installed, press down from the top of the spring pressure cap 31. At this time, the spring pressure cap moves downward along the axial direction of the slip 35, driving the locking block 33 to move downward. When the locking block 33 is installed at the opening, the spring pressure cap 31 is released, and under the action of the auxiliary spring 32, the spring pressure cap 31 returns to its position.

[0070] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A combined pipe string gas well wire fishing and drainage tool, characterized in that: It includes a core puller, a conventional puller, a core connection tool and a steel wire, wherein the core puller cooperates with the large-size oil pipe in the combined pipe string, and the core connection tool and the conventional puller cooperate with the small-size oil pipe in the combined pipe string; The lower end of the through-hole connecting tool is connected to the upper end of the conventional drawer, and the upper end of the through-hole connecting tool is connected to the lower end of the through-hole drawer; one end of the steel wire passes through the through-hole drawer and is connected to the through-hole connecting tool.

2. A combined pipe string gas well wire fishing and drainage tool according to claim 1, characterized in that: The through-hole drawer is connected to the through-hole connecting tool by a snap fit.

3. A combined pipe string gas well wire fishing and drainage tool according to claim 1, characterized in that: The conventional drawer is threadedly connected to the through-hole connection tool.

4. A combined pipe string gas well wire fishing and drainage tool according to claim 1, characterized in that: The through-hole drawer comprises a conventional drawer body, which is provided with an axially arranged central through hole, and the steel wire passes through the central through hole and is connected to the through-hole connecting tool.

5. A combined pipe string gas well wire fishing and drainage tool according to claim 4, characterized in that: The inner wall of the lower end of the conventional drawer body is provided with grooves arranged in a circumferential direction, and the grooves cooperate with the locking blocks sleeved on the outer wall of the upper end of the through-hole connecting tool.

6. A combined pipe string gas well wire fishing and drainage tool according to claim 4, characterized in that: Copper cores are provided at both ends of the central through hole.

7. The combined pipe string gas well wire fishing and drainage tool according to claim 1, characterized in that: The through-hole connection tool includes a spring pressure cap, a locking block, an auxiliary spring, a spring, a slip, an outer cone sleeve, an inner cone sleeve, a pressure cap and a lower fishing diameter, wherein: An auxiliary spring and a spring pressure cap are provided in the upper inner cavity of the slip, and the spring pressure cap is placed on the upper end of the auxiliary spring to achieve position limiting and fixing of the auxiliary spring; The upper side wall of the slip is provided with a circumferentially arranged opening, in which a locking block is installed. The locking block is sleeved on the outer wall of the spring pressure cap; the locking block cooperates with the groove provided at the lower end of the through-hole drawer; An inner cone sleeve is provided in the inner cavity of the middle section of the slip, an outer cone sleeve is sleeved on the outer wall of the inner cone sleeve, a pressure cap is provided at the lower end of the inner cone sleeve, and the outer cone sleeve is fixedly connected to the pressure cap; A lower fishing neck is provided in the inner cavity at the lower end of the slip, and the bottom of the lower fishing neck is connected to a conventional drawer; The steel wire passes through the slips, the inner cone sleeve and the pressure cap in sequence and is connected with the lower fishing neck.

8. A combined pipe string gas well wire fishing and drainage tool according to claim 7, characterized in that: A screw hole is provided on the side wall of the lower end of the through-hole drawer, and the screw hole is connected to the slide groove provided on the outer wall of the slip. A top screw is installed in the screw hole, and a steel ball is provided between the top screw and the slide groove.

9. A combined pipe string gas well wire fishing and drainage tool according to claim 8, characterized in that: The side wall of the chute close to the upper end of the slip is an inclined surface, which is convenient for the sliding of the steel ball.

10. The combined pipe string gas well wire fishing and drainage tool according to claim 7, characterized in that: The locking block is adhered to the opening by means of lubricating grease.

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