Colloid falling object fishing tool and method

Abstract

The invention relates to underground fallen object treatment equipment, in particular to a colloid fallen object fishing tool and method.The colloid fallen object fishing tool comprises a cutting part and a driving part; a first cutting piece is arranged at one end of the cutting part, and the first cutting piece can cut a colloid falling object; a clamping surface is arranged on the first cutting piece, and the clamping surface can be clamped with a colloid falling object; a telescopic cavity is formed in the driving part; the end, away from the first cutting piece, of the cutting part is inserted into the telescopic cavity. The driving part can drive the cutting part to move in the direction close to the cavity bottom of the telescopic cavity or away from the cavity bottom of the telescopic cavity. The first cutting piece can be inserted into the falling colloid object and is clamped with the falling colloid object through the clamping surface, so that the falling colloid object is pulled out, and if the pulling-out of the falling colloid object is blocked, the first cutting piece can be driven by the driving part to move repeatedly to cut and differentiate the falling colloid object. The colloid falling objects can be fished out timely and quickly, the influence on normal production of the oil and gas well is avoided, and normal and stable production of the oil and gas well can be recovered.

Description

Technical Field

[0001] This invention pertains to equipment for handling debris falling into wells, and specifically relates to a tool and method for retrieving colloidal debris. Background Technology

[0002] During the long-term production process of oil and gas wells, as the wells enter the later stages of production and downhole operations increase, a large amount of debris can easily fall into the wellbore, leading to frequent blockages. Therefore, it is necessary to use retrieval tools to retrieve the debris from the well.

[0003] Existing retrieval tools include hydraulic retrieval cylinders, reverse circulation retrieval cylinders, and mechanical external cutters. Furthermore, milling techniques and related tools have been developed for handling some unretrievable downhole debris, which can effectively handle most cases. However, when the downhole debris is made of flexible materials such as rubber, for example, during the removal of a plunger catcher, the center rod is pulled out, but the rubber and lower part remain in the well. Without the support of the center rod, the rubber is easily heated and expands, becoming stuck in the well. This makes it difficult to retrieve such colloidal debris quickly and promptly, potentially impacting the normal production of oil and gas wells and hindering the restoration of stable production.

[0004] Therefore, existing salvage tools are slow in retrieving heat-expanding colloidal objects. Summary of the Invention

[0005] To address the above problems, this invention proposes a tool and method for retrieving colloidal debris, wherein the colloidal debris retrieval tool includes:

[0006] The cutting section has a first cutting element at one end, which is capable of cutting the colloid droplet.

[0007] The first cutting component is provided with a snap-fit ​​surface, which can snap into the colloid droplet;

[0008] The drive unit has a telescopic cavity inside it;

[0009] The end of the cutting part away from the first cutting element is inserted into the telescopic cavity;

[0010] The driving unit can drive the cutting unit to move along the direction close to or away from the bottom of the telescopic cavity.

[0011] In some specific embodiments, the cutting portion includes:

[0012] A telescopic rod, one end of which is inserted into the telescopic cavity;

[0013] The first cutting element is located at the other end of the telescopic rod.

[0014] In some specific embodiments, the first cutting member is triangular, with a pointed cutting head formed at the end of the first cutting member away from the driving part, and the snap-fit ​​surface formed at the end of the first cutting member close to the driving part.

[0015] In some specific embodiments, there are multiple first cutting elements, which are connected end to end in sequence to form multiple snap-fit ​​surfaces.

[0016] In some specific embodiments, the two sides of the snap-fit ​​surface extend radially outward along the telescopic rod.

[0017] In some specific embodiments, the cutting portion further includes:

[0018] A second cutting element is disposed on the telescopic rod adjacent to the first cutting element;

[0019] The second cutting element has a cutting surface on its outer side, and the two ends of the cutting surface extend radially along the telescopic rod.

[0020] In some specific embodiments, the driving unit includes:

[0021] A telescopic cylinder, wherein the telescopic cavity is formed inside the telescopic cylinder along the axial direction of the telescopic cylinder;

[0022] The end of the telescopic rod away from the first cutting element is inserted into the telescopic cavity by one end of the telescopic cylinder;

[0023] When the telescopic cylinder is lifted, the telescopic rod moves along the axial direction of the telescopic cylinder in a direction away from the bottom of the telescopic cavity;

[0024] When the telescopic cylinder is vibrated, the telescopic rod moves along the axial direction of the telescopic cylinder toward the bottom of the telescopic cavity;

[0025] A connector is provided at the other end of the telescopic cylinder and is used to connect to the salvage equipment.

[0026] In some specific embodiments, the salvage equipment includes:

[0027] A shock absorber is coaxially arranged with the telescopic cylinder. The shock absorber can apply a shock force to the telescopic cylinder along the axial direction of the telescopic cylinder, and the applied shock force drives the telescopic rod to move along the axial direction of the telescopic cylinder towards the bottom of the telescopic cavity.

[0028] In some specific embodiments, the salvage equipment further includes:

[0029] A weight is provided, which is coaxially arranged with the telescopic cylinder. The weight can apply pressure to the telescopic cylinder along its axial direction.

[0030] A method for retrieving colloidal debris based on the same concept, employing the colloidal debris retrieval tool as described in any of the above specific embodiments, includes the following steps:

[0031] The drive unit and the cutting unit are lowered into the well, and the first cutting part of the cutting unit is inserted into the colloid material in the well, and the first cutting part is engaged with the colloid material through the snap-fit ​​surface of the first cutting part.

[0032] The drive unit is continuously raised, which in turn drives the cutting unit to pull the colloidal material out of the well.

[0033] When the colloidal material gets stuck in the well, the drive unit drives the cutting unit to move the first cutting piece repeatedly along the direction close to or away from the bottom of the telescopic cavity to cut the colloidal material.

[0034] After cutting the colloid material, discharge the cut colloid material into the well.

[0035] The colloidal debris retrieval tool of the present invention allows for the insertion of a first cutting member into the colloidal debris that has fallen into the well. The first cutting member engages with the debris via its snap-fit ​​surface, thereby pulling the debris out. If the removal of the debris is obstructed, such as when the debris expands due to heat and becomes stuck in the well, the drive unit can propel the first cutting member along the direction close to or away from the bottom of the telescopic cavity. This allows the first cutting member to cut the debris, breaking down the larger, thermally expanded debris into multiple smaller debris, which can then be discharged outside the well via air lift or other methods. This allows for timely and rapid retrieval of such colloidal debris, preventing disruption to normal oil and gas well production and restoring stable production.

[0036] The colloidal object retrieval method of the present invention uses the colloidal object retrieval tool described above, and therefore has the same beneficial effects as the colloidal object retrieval tool described above, so it will not be described again here.

[0037] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of a colloidal object retrieval tool according to an embodiment of the present invention is shown;

[0040] Figure 2 A flowchart of a method for retrieving colloidal debris according to an embodiment of the present invention is shown.

[0041] In the figure, 100 is the drive unit; 110 is the telescopic cylinder; 120 is the connector; 200 is the cutting unit; 210 is the telescopic rod; 220 is the first cutting component; and 230 is the second cutting component. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Reference Figure 1 This invention provides a tool for retrieving colloidal debris, comprising a cutting section 200 and a driving section 100. One end of the cutting section 200 is provided with a first cutting element 220 for inserting the colloidal debris. The first cutting element 220 has a snap-fit ​​surface capable of engaging with the colloidal debris. The driving section 100 has a telescopic cavity. The end of the cutting section 200 away from the first cutting element 220 is inserted into the telescopic cavity. The driving section 100 is capable of driving the cutting section 200 to move along a direction close to or away from the bottom of the telescopic cavity.

[0044] Specifically, one end of the cutting part 200 is inserted into the telescopic cavity of the driving part 100, and the driving part 100 can drive the cutting part 200 to move along the direction close to or away from the bottom of the telescopic cavity. The first cutting element 220 is disposed at the other end of the cutting part 200, and when the cutting part 200 moves, it can drive the first cutting element 220 to move together, thereby enabling the first cutting element 220 to move along the direction close to or away from the bottom of the telescopic cavity. When a difficult-to-retrieve colloidal object falls into the well, the first cutting member 220 of the cutting section 200 can insert into the colloidal object and engage with it through its engaging surface. This facilitates the removal of the colloidal object by the lifting drive section 100 and the cutting section 200. If the colloidal object expands due to heat and becomes stuck in the well, the drive section 100 can drive the cutting section 200 to repeatedly move the first cutting member 220 along the direction close to or away from the bottom of the telescopic cavity. Specifically, the cutting section 200 first moves the first cutting member 220 along the direction close to the bottom of the telescopic cavity, and then moves it along the direction away from the bottom of the telescopic cavity. This repeated movement of the first cutting member 220 cuts the colloidal object, breaking it down into smaller pieces, which can then be discharged outside the well by air lift or other methods. It can retrieve such colloidal debris in a timely and rapid manner, avoiding any impact on the normal production of oil and gas wells and restoring their normal and stable production.

[0045] In some specific embodiments of the present invention, the cutting part 200 includes a telescopic rod 210. One end of the telescopic rod 210 is inserted into the telescopic cavity, and the driving part 100 can drive the telescopic rod 210 to move repeatedly along the direction close to or away from the bottom of the telescopic cavity. A first cutting element 220 is disposed at the other end of the telescopic rod 210. The driving part 100 drives the telescopic rod 210 to move, thereby causing the first cutting element 220 to also move repeatedly along the direction close to or away from the bottom of the telescopic cavity. The repeated movement of the first cutting element 220 can cut the colloidal debris in the well. This allows for timely and rapid retrieval of such colloidal debris, avoiding disruption to the normal production of the oil and gas well and restoring its normal and stable production.

[0046] In some specific embodiments of the present invention, the first cutting member 220 is triangular in shape, with a pointed cutting head formed at the end of the first cutting member 220 away from the driving part 100, and a snap-fit ​​surface formed at the end of the first cutting member 220 near the driving part 100. The bottom side of the triangular first cutting member 220 is positioned opposite to the end of the telescopic rod 210 away from the telescopic cavity and is connected to that end of the telescopic rod 210 away from the telescopic cavity. The snap-fit ​​surface is formed by the bottom side of the triangular first cutting member 220, and the two hypotenuses of the triangular first cutting member 220 intersect to form a pointed cutting head. When colloidal debris falls into a well and is difficult to retrieve, a pointed cutting head formed by the intersection of the two beveled sides of the first cutting member 220 can insert into the debris. The locking surface formed by the bottom of the first cutting member 220 engages with the debris, facilitating its removal by the lifting drive unit 100 and the cutting unit 200. If the debris expands due to heat and becomes stuck in the well, the drive unit 100 can drive the cutting unit 200 to repeatedly move the first cutting member 220 along the direction close to or away from the bottom of the telescopic cavity. The two beveled sides of the first cutting member 220 repeatedly cut the debris, breaking the larger, expanded debris into smaller pieces, which can then be removed from the well by air lift or other methods. This allows for timely and rapid retrieval of such colloidal debris, preventing disruption to normal oil and gas well production and restoring stable production.

[0047] Furthermore, the thickness of the bottom edge of the first cutting member 220 is greater than the thickness of the cutting head of the first cutting member 220, which facilitates the insertion of the first cutting member 220 into the colloid droplet. In addition, the thicker bottom edge of the first cutting member 220 is more conducive to the formation of the snap-fit ​​surface, which can ensure the strong snap-fit ​​between the colloid droplet and the snap-fit ​​surface and prevent the first cutting member 220 from separating from the inserted colloid droplet.

[0048] In some specific embodiments of the present invention, there are multiple first cutting elements 220, which are sequentially connected end-to-end to form multiple snap-fit ​​surfaces. For example, there are three first cutting elements 220. The bottom edge of the first first cutting element 220 is located at the end of the telescopic rod 210 away from the telescopic cavity. The bottom edge of the second first cutting element 220 is connected to a pointed cutting head formed by the intersection of the two beveled sides of the first first cutting element 220. The bottom edge of the third first cutting element 220 is connected to a pointed cutting head formed by the intersection of the two beveled sides of the second first cutting element 220, and so on. By forming multiple snap-fit ​​surfaces with the bottom edges of the multiple first cutting elements 220, after the multiple first cutting elements 220 are inserted into the colloid, the multiple snap-fit ​​surfaces can snap into the colloid, thereby improving the connection strength with the colloid. Furthermore, when cutting the colloid, the colloid can be cut by the beveled side of each first cutting element 220, thereby improving the cutting efficiency.

[0049] In some specific embodiments of the present invention, the two sides of the snap-fit ​​surface extend radially outward along the telescopic rod 210 to increase the area of ​​the snap-fit ​​surface. The bottom side of the triangular first cutter 220 extends radially away from the axis of the telescopic rod 210, thereby increasing the width of the snap-fit ​​surface and further increasing the area of ​​the snap-fit ​​surface, thereby ensuring a firm snap-fit ​​between the snap-fit ​​surface and the inserted colloid.

[0050] In some specific embodiments of the present invention, the cutting part 200 further includes a second cutting member 230. The second cutting member 230 is disposed on the telescopic rod 210 adjacent to the first cutting member 220. A cutting surface for cutting colloid debris is formed on the outer side of the second cutting member 230. The two ends of the cutting surface extend radially along the telescopic rod 210, and both the end of the cutting surface near the driving part 100 and the end away from the driving part 100 are bent toward the direction of approaching the telescopic rod 210.

[0051] Specifically, the second cutting element 230 is disposed on the telescopic rod 210 and is located between the portion of the telescopic rod 210 inserted into the telescopic cavity and the first cutting element 220. When the colloid material expands due to heat and becomes stuck in the well, the driving unit 100 can drive the cutting unit 200 to repeatedly move the second cutting element 230 along the direction close to or away from the bottom of the telescopic cavity. That is, first the cutting unit 200 moves the second cutting element 230 along the direction close to the bottom of the telescopic cavity, and then the cutting unit 200 moves the second cutting element 230 along the direction away from the bottom of the telescopic cavity, and so on. Thus, the colloid material can be cut by the repeatedly moving second cutting element 230. The outer sides of the two sides of the second cutting element 230 are formed for cutting the colloid. The cutting surface of the debris extends radially along the telescopic rod 210 at both ends. Furthermore, both the end of the cutting surface near the drive unit 100 and the end away from the drive unit 100 are bent towards the telescopic rod 210. This means that when the second cutting element 230 moves towards the bottom of the telescopic cavity, it can cut the colloidal debris; when the second cutting element 230 moves away from the bottom of the telescopic cavity, it can also cut the colloidal debris. This allows the larger colloidal debris, which expands due to heat, to break down more quickly into multiple smaller colloidal debris, which can then be discharged outside the well via methods such as air lift. This allows for timely and rapid retrieval of such colloidal debris, preventing disruption to normal oil and gas well production and restoring stable production.

[0052] In some specific embodiments of the present invention, the drive unit 100 includes a telescopic cylinder 110 and a connecting member 120. A telescopic cavity is formed within the telescopic cylinder 110 along its axial direction. One end of the telescopic rod 210, away from the first cutting member 220, is inserted into the telescopic cavity from one end of the telescopic cylinder 110. When the telescopic cylinder 110 is lifted, the telescopic rod 210 moves along the axial direction of the telescopic cylinder 110 towards the bottom of the cavity. When the telescopic cylinder 110 is vibrated, the telescopic rod 210 moves along the axial direction of the telescopic cylinder 110 towards the bottom of the cavity, thereby enabling the telescopic cylinder 110 to drive the telescopic rod 210 to move the first cutting member 220 and the second cutting member 230. The connecting member 120 is disposed at the other end of the telescopic cylinder 110 and is used to connect to a retrieval device to facilitate lifting or vibrating the telescopic cylinder 110.

[0053] In some specific embodiments of the present invention, the salvage device includes a shock absorber. The shock absorber is coaxially arranged with the telescopic cylinder 110, so that the shock absorber can apply a shock force to the telescopic cylinder 110 along the axial direction of the telescopic cylinder 110. The applied shock force can drive the telescopic rod 210 to move along the axial direction of the telescopic cylinder 110 towards the bottom of the telescopic cavity. That is, when the telescopic cylinder 110 is shocked, the telescopic rod 210 retracts into the telescopic cavity, thereby realizing the retraction of the telescopic rod 210.

[0054] In some specific embodiments of the present invention, the retrieval equipment further includes a weight. The weight is coaxially arranged with the telescopic cylinder 110, and the weight itself can apply pressure to the telescopic cylinder 110 along its axial direction to stabilize it. Applying pressure to the telescopic cylinder 110 by the weight not only ensures its stability but also assists the first cutting piece 220 in inserting into the colloidal debris when the well depth is too large, thus improving the smoothness of insertion.

[0055] Reference Figure 2 The present invention also provides a method for retrieving colloidal debris, employing the colloidal debris retrieval tool as described in any of the above specific embodiments, comprising the following steps: lowering the drive unit 100 together with the cutting unit 200 into the well, and inserting the first cutting element 220 of the cutting unit 200 into the colloidal debris in the well, engaging with the colloidal debris through the engaging surface of the first cutting element 220. Continuously lifting the drive unit 100 and driving the cutting unit 200 to pull the colloidal debris out of the well. When the colloidal debris is stuck in the well, the drive unit 100 drives the cutting unit 200 to repeatedly move the first cutting element 220 along a direction close to or away from the bottom of the telescopic cavity to cut the colloidal debris. After cutting the colloidal debris, the cut colloidal debris is discharged from the well.

[0056] Specifically, the telescopic cylinder 110, along with the telescopic rod 210 equipped with the first cutting element 220 and the second cutting element 230, is lowered into the well via the connector 120. Under the action of the weight, it is continuously lowered, causing the cutting head of the first cutting element 220 to insert into the colloid material in the well and engage with it through the engaging surface of the first cutting element 220. After engaging with the colloid material, the telescopic cylinder 110 is continuously lifted via the connector 120, which in turn drives the telescopic rod 210 equipped with the first cutting element 220 and the second cutting element 230, thereby pulling the colloid material engaged with the first cutting element 220 out of the well. When the colloidal debris expands due to heat and becomes stuck in the well, lifting the telescopic cylinder 110 drives the telescopic rod 210 to move the first cutting element 220 and the second cutting element 230 away from the bottom of the telescopic cavity. Vibrating the telescopic cylinder 110 with a shocker drives the telescopic rod 210 to move the first cutting element 220 and the second cutting element 230 closer to the bottom of the telescopic cavity. The repeated movement of the first cutting element 220 and the second cutting element 230 cuts the colloidal debris in the well. After cutting the larger, thermally expanded colloidal debris, multiple smaller debris particles can be discharged from the well. This allows for timely and rapid retrieval of such debris, preventing disruption to normal oil and gas well production and restoring stable production.

[0057] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tool for retrieving colloidal debris, characterized in that, include: A cutting section (200) is provided at one end of which a first cutting element (220) is provided, the first cutting element (220) being capable of cutting colloid debris; The first cutting member (220) is provided with a snap-fit ​​surface, which can snap-fit ​​with the colloid droplet; A drive unit (100) is provided with a telescopic cavity; The end of the cutting part (200) away from the first cutting member (220) is inserted into the telescopic cavity; The driving unit (100) can drive the cutting unit (200) to move along the direction close to or away from the bottom of the telescopic cavity.

2. The colloidal object retrieval tool according to claim 1, characterized in that, The cutting section (200) includes: Telescopic rod (210), one end of which is inserted into the telescopic cavity; The first cutting element (220) is disposed at the other end of the telescopic rod (210).

3. The colloidal object retrieval tool according to claim 2, characterized in that, The first cutting member (220) is triangular in shape. The end of the first cutting member (220) away from the driving part (100) forms a pointed cutting head, and the end of the first cutting member (220) near the driving part (100) forms the snap-fit ​​surface.

4. The colloidal object retrieval tool according to claim 3, characterized in that, There are multiple first cutting elements (220), and the multiple first cutting elements (220) are connected end to end in sequence to form multiple snap-fit ​​surfaces.

5. The colloidal object retrieval tool according to claim 3 or 4, characterized in that, The two sides of the snap-fit ​​surface extend outward along the radial direction of the telescopic rod (210).

6. The colloidal object retrieval tool according to claim 2, characterized in that, The cutting section (200) further includes: The second cutting element (230) is disposed on the telescopic rod (210) adjacent to the first cutting element (220); The second cutting member (230) has a cutting surface on its outer side, and the two ends of the cutting surface extend radially along the telescopic rod (210).

7. The colloidal object retrieval tool according to claim 2, characterized in that, The drive unit (100) includes: Telescopic cylinder (110), wherein the telescopic cavity is formed inside the telescopic cylinder (110) along the axial direction of the telescopic cylinder (110); The end of the telescopic rod (210) away from the first cutting piece (220) is inserted into the telescopic cavity by one end of the telescopic cylinder (110); When the telescopic cylinder (110) is lifted, the telescopic rod (210) moves along the axial direction of the telescopic cylinder (110) in a direction away from the bottom of the telescopic cavity; When the telescopic cylinder (110) is vibrated, the telescopic rod (210) moves along the axial direction of the telescopic cylinder (110) towards the bottom of the telescopic cavity; A connector (120) is provided at the other end of the telescopic cylinder (110) and is used to connect the salvage equipment.

8. The colloidal object retrieval tool according to claim 7, characterized in that, The salvage equipment includes: The shock absorber is coaxially arranged with the telescopic cylinder (110). The shock absorber can apply a shock force to the telescopic cylinder (110) along the axial direction of the telescopic cylinder (110). The applied shock force drives the telescopic rod (210) to move along the axial direction of the telescopic cylinder (110) towards the bottom of the telescopic cavity.

9. The colloidal object retrieval tool according to claim 7, characterized in that, The salvage equipment also includes: A weight is provided, which is coaxially arranged with the telescopic cylinder (110). The weight can apply pressure to the telescopic cylinder (110) along its axial direction by the weight.

10. A method for retrieving colloidal debris, employing the colloidal debris retrieval tool as described in any one of claims 1 to 9, characterized in that, Includes the following steps: The drive unit (100) and the cutting unit (200) are lowered into the well, and the first cutting part (220) of the cutting unit (200) is inserted into the colloid debris in the well, and the first cutting part (220) is engaged with the colloid debris through the snap-fit ​​surface of the first cutting part (220). The drive unit (100) is continuously lifted and driven by the cutting unit (200) to pull the colloidal material out of the well. When the colloidal material gets stuck in the well, the drive unit (100) drives the cutting unit (200) to move the first cutting element (220) repeatedly along the direction close to or away from the bottom of the telescopic cavity to cut the colloidal material. After cutting the colloid material, discharge the cut colloid material into the well.

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