Salvage device capable of quantizing release

Abstract

The utility model relates to the technical field of oil pipe salvage, in particular to a salvage device capable of quantizing a releasing tool. The fishing device comprises a barrel, a slip and a shear pin seat. The barrel is provided with a communicating containing cavity and a releasing cavity, and the inner diameter of the containing cavity is smaller than that of the releasing cavity. The slip is arranged in the containing cavity, and an opening of the slip is used for clamping the part to be fished in the containing cavity. The shear pin seat is arranged in the containing cavity and located on the side, facing the release cavity, of the slip, the shear pin seat is provided with a first cavity for a to-be-fished piece to penetrate through, and the shear pin seat is connected with the cylinder through a shear pin. And when the acting force applied by the to-be-fished piece to the slip is equal to or larger than the preset shear stress of the shear pin, the shear pin is broken, and the slip and the shear pin base move to the release cavity, so that the opening expands in the radial direction of the barrel body and releases the to-be-fished piece.

Description

Technical Field

[0001] The present application relates to the technical field of oil pipe salvage, and in particular to a salvage device capable of quantifying the loss of the oil pipe. Background Art

[0002] In cluster perforating operations, liquid pressure is used to push the perforating tool string toward the target layer. After the perforating task is completed, the perforating tool string may get stuck in the well due to casing deformation, sand blockage, etc., and may be pulled off from the weak point, leaving the tool string in the well.

[0003] In the prior art, a coiled tubing and a retractable slip overshot tube are generally used for salvage operations. If the perforating tool string is severely stuck and the lifting and unwinding force exceeds the tensile limit of the coiled tubing, the coiled tubing will break, causing a portion of the coiled tubing and the salvage device to fall into the well, increasing the difficulty of the salvage operation. Utility Model Content

[0004] The present application discloses a salvage device capable of quantifying the loss of the salvage device, which can prevent the salvage device from falling into a well.

[0005] In order to achieve the above-mentioned purpose, the present application discloses a salvage device, comprising:

[0006] A cylinder body, wherein the cylinder body is provided with a receiving chamber and a releasing chamber which are connected, and the inner diameter of the receiving chamber is smaller than the inner diameter of the releasing chamber;

[0007] Slips, the slips are arranged in the accommodating cavity, and the openings of the slips are used to clamp the object to be salvaged in the accommodating cavity; and

[0008] A shear pin seat, the shear pin seat is arranged in the accommodating cavity and is located on the side of the slip facing the release cavity, the shear pin seat has a first cavity for the salvaged piece to pass through, and the shear pin seat is connected to the cylinder through a shear pin;

[0009] When the force exerted by the salvaged component on the slip is equal to or greater than the preset shear stress of the shear pin, the shear pin breaks, and the slip and the shear pin seat move to the release chamber to expand the opening along the radial direction of the cylinder and release the salvaged component.

[0010] Optionally, it also includes a guide shoe connected to the cylinder, the guide shoe has a guide cavity connected to the release cavity, the guide cavity is located on the side of the release cavity away from the accommodating cavity, and the inner diameter of the guide cavity is smaller than the inner diameter of the accommodating cavity.

[0011] Optionally, the inner wall of the opening is provided with serrations.

[0012] Optionally, the teeth have pointed ends offset toward an end of the slip away from the opening.

[0013] Optionally, it also includes a slip seat that cooperates with the opening, and the slip seat is arranged in the accommodating cavity and located on the side of the shear pin seat away from the release cavity; when the opening cooperates with the slip seat, the opening is tightened along the radial direction of the cylinder.

[0014] Optionally, the cava seat has a second cavity and a first end and a second end opposite to each other, the first end is located on the side of the second end away from the shear pin seat, the inner diameter of the second cavity gradually decreases from the first end toward the second end, and the inner wall of the second cavity formed by the cava seat can abut against the outer wall of the opening.

[0015] Optionally, the outer wall of the opening is provided with a conical surface, and the conical surface can fit with the inner wall of the second cavity formed by the slip seat.

[0016] Optionally, it further comprises an elastic member arranged in the accommodating cavity, the elastic member is compressed and arranged on a side of the slip away from the slip seat, and the elastic member abuts against the slip.

[0017] Optionally, it also includes:

[0018] A guide member, wherein the guide member is disposed in the accommodating cavity, the guide member and the cylinder body form an inner wall of the accommodating cavity and are spaced apart from each other, the guide member is connected to an end of the slip away from the opening, and the elastic member is sleeved on the guide member; and

[0019] A limiting member, wherein the limiting member is arranged on the guiding member, the limiting member is located between the guiding member and the inner wall of the accommodating cavity formed by the cylinder, and abuts against the inner wall of the accommodating cavity formed by the cylinder, and the elastic member abuts against the limiting member.

[0020] Optionally, it further comprises an upper joint connected to the cylinder, wherein an end of the upper joint away from the cylinder is used for connecting a coiled tubing, and a tensile limit of the coiled tubing is greater than a preset shear stress of the shear pin.

[0021] The present application provides a salvage device capable of quantifying lost hands, which has at least the following beneficial effects compared with the prior art:

[0022] The present application provides a salvage device with quantifiable loss of grip, in which a shear pin seat and a cylinder are connected by a shear pin. When the force exerted on the slip by the piece to be salvaged is equal to or greater than the preset shear stress of the shear pin, the shear pin breaks, and the slip and the shear pin seat move to the release chamber to expand the opening along the radial direction of the cylinder and release the piece to be salvaged, thereby preventing the salvage device from falling into the well when the piece to be salvaged is not unstuck, thereby avoiding increasing the difficulty of the next salvage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] The present application will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0025] Figure 1 is a half-section diagram of a salvage device provided in an embodiment of the present application;

[0026] Figure 2 It is a cross-sectional view of the slip provided in the embodiment of the present application.

[0027] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0028] Reference numerals:

[0029] 1- Salvage device;

[0030] 11-cylinder; 111-accommodating chamber; 112-releasing chamber;

[0031] 12-slip; 121-opening; 1211-conical surface; 122-serration; 1221-tip;

[0032] 13-shear pin seat; 131-first cavity;

[0033] 14- shear pin;

[0034] 15-guide shoe; 151-guide cavity;

[0035] 16-slip seat; 161-second cavity; 162-first end; 163-second end;

[0036] 17- elastic member;

[0037] 181-guide member; 182-limiting member;

[0038] 19-Upper connector. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In this application, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; 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 an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0042] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0043] Please also read Figure 1 and Figure 2 The embodiment of the present application provides a salvage device 1 that can quantify the loss of a piece, comprising a cylinder 11, a slip 12 and a shear pin seat 13. The cylinder 11 is provided with a communicating accommodation chamber 111 and a release chamber 112, and the inner diameter of the accommodation chamber 111 is smaller than the inner diameter of the release chamber 112. The slip 12 is provided in the accommodation chamber 111, and the opening 121 of the slip 12 is used to clamp the piece to be salvaged in the accommodation chamber 111. The shear pin seat 13 is provided in the accommodation chamber 111, and is located on the side of the slip 12 facing the release chamber 112, and the shear pin seat 13 has a first cavity 131 for the piece to be salvaged to pass through, and the shear pin seat 13 is connected to the cylinder 11 through the shear pin 14. When the force exerted by the salvaged component on the slips 12 is equal to or greater than the preset shear stress of the shear pin 14, the shear pin 14 breaks, and the slips 12 and the shear pin seat 13 move to the release chamber 112, so that the opening 121 expands radially along the cylinder 11 and releases the salvaged component.

[0044] The barrel 11 is cylindrical, and the accommodating chamber 111 and the releasing chamber 112 are both cylindrical. Of course, the barrel 11, the accommodating chamber 111 and the releasing chamber 112 may also be in other shapes, which are not limited here.

[0045] In this embodiment, the outer diameter of the barrel 11 can be 102 mm, the inner diameter of the accommodating chamber 111 can be 85 mm, and the inner diameter of the releasing chamber 112 can be 91.5 mm. Of course, the outer diameter of the barrel 11, the inner diameter of the accommodating chamber 111, and the inner diameter of the releasing chamber 112 can also be other sizes, which are not limited here.

[0046] Since the shear pin seat 13 is connected to the cylinder 11 through the shear pin 14, the shear pin seat 13 is fixedly arranged in the accommodating chamber 111. The shear pin seat 13 is arranged on the side of the slip 12 facing the release chamber 112, so that the shear pin seat 13 can limit the slip 12 when the shear pin 14 is not broken, that is, the slip 12 is restricted in the accommodating chamber 111 to prevent the slip 12 from moving into the release chamber 112.

[0047] The working principle of this embodiment is to vertically place the cylinder 11 into the well with the accommodating chamber 111 on top and the releasing chamber 112 on the bottom, and the object to be salvaged enters the accommodating chamber 111 through the releasing chamber 112 and passes through the first chamber 131, so that the opening 121 of the slip 12 clamps the object to be salvaged.

[0048] After the opening 121 of the slip 12 clamps the salvage object, an upward lifting force is applied to the salvage device 1 to lift the salvage device 1. It can be understood that when the salvage object is not unstuck, the magnitude of the lifting force of the salvage device 1 is equal to the magnitude of the downward force applied by the salvage object to the slip 12, and the magnitude of the shear stress on the shear pin 14 is also equal to the magnitude of the downward force applied by the salvage object to the slip 12.

[0049] When the lifting force of the lifting salvage device 1 is less than the preset shear stress of the shear pin 14, if the salvaged piece is unstuck, the shear pin 14 will not break, and the salvage device 1 drives the salvaged piece to move upward under the action of the lifting force and finally pulls it out of the well.

[0050] When the lifting force of the lifting salvage device 1 is equal to or greater than the preset shear stress of the shear pin 14, if the salvage object is not unstuck, the shear pin 14 breaks, the cylinder 11 rises under the action of the lifting force, and the slip 12 falls relative to the cylinder 11 under the action of the salvage object, so that the slip 12 and the shear pin seat 13 move relatively to the release chamber 112. Since the inner diameter of the release chamber 112 is larger than the inner diameter of the accommodating chamber 111, the opening 121 of the slip 12 expands along the radial direction of the cylinder 11, thereby releasing the salvage object, that is, the slip 12 is separated from the salvage object. As the cylinder 11 rises, the salvage object is pulled out of the cylinder 11.

[0051] It can be understood that quantifiable means that the shear pin breaks when the lifting force of the lifting salvage device 1 is equal to or greater than the preset shear stress of the shear pin 14. Dropping means that the cylinder 11 continues to rise after the shear pin breaks, which is equivalent to the slip 12 being pulled into the release chamber 112 by the salvaged object, and the slip 12 expands radially along the cylinder 11 and releases the salvaged object.

[0052] In summary, it can be seen that the salvage device 1 provided in the embodiment of the present application connects the shear pin seat 13 and the cylinder 11 through the shear pin 14. When the force exerted by the salvaged piece on the slip 12 is equal to or greater than the preset shear stress of the shear pin 14, the shear pin 14 breaks, and the slip 12 and the shear pin seat 13 move to the release chamber 112, so that the opening 121 expands along the radial direction of the cylinder 11 and releases the piece to be salvaged, preventing the salvage device 1 from falling into the well when the piece to be salvaged is not unstuck, thereby avoiding increasing the difficulty of the next salvage.

[0053] Please refer again Figure 1 In some embodiments, the salvage device 1 also includes a guide shoe 15 connected to the cylinder 11, and the guide shoe 15 has a guide cavity 151 connected to the release cavity 112. The guide cavity 151 is located on the side of the release cavity 112 away from the accommodating cavity 111, and the inner diameter of the guide cavity 151 is smaller than the inner diameter of the accommodating cavity 111.

[0054] In this embodiment, the inner diameter of the guide cavity 151 may be 69 mm. Of course, the inner diameter of the guide cavity 151 may also be other sizes, which are not limited here.

[0055] The working principle of this embodiment is to vertically place the cylinder 11 into the well with the accommodating chamber 111 on top and the releasing chamber 112 on the bottom, and the object to be salvaged passes through the guide chamber 151 and the releasing chamber 112 in sequence into the accommodating chamber 111 and through the first chamber 131, so that the opening 121 of the slip 12 clamps the object to be salvaged.

[0056] When the lifting force of the lifting salvage device 1 is equal to or greater than the preset shear stress of the shear pin 14, if the salvage object is not unstuck, the shear pin 14 breaks, the cylinder 11 rises under the action of the lifting force, and the slip 12 descends relative to the cylinder 11 under the action of the salvage object, so that the slip 12 and the shear pin seat 13 move relatively to the release chamber 112. Since the inner diameter of the release chamber 112 is larger than the inner diameter of the accommodating chamber 111, the opening 121 of the slip 12 expands along the radial direction of the cylinder 11, thereby releasing the salvage object, that is, the slip 12 is separated from the salvage object. As the cylinder 11 rises, the salvage object is pulled out of the cylinder 11 through the guide chamber 151. At this time, since the inner diameter of the guide chamber 151 is smaller than the inner diameter of the accommodating chamber 111, the slip 12 and the shear pin seat 13 cannot fall into the well through the guide chamber 151 and remain in the release chamber 112. As the cylinder 11 rises, the slips 12 and the shear pin seats 13 are taken out of the well because they remain in the release chamber 112 .

[0057] In summary, the inner diameter of the guide cavity 151 of the guide shoe 15 is smaller than the inner diameter of the accommodating cavity 111, which can prevent the slip 12 and the shear pin seat 13 from falling into the well through the guide cavity 151, further avoiding increasing the difficulty of salvaging the salvaged parts next time.

[0058] Please refer again Figure 2In some embodiments, the inner wall of the opening 121 is provided with saw teeth 122 .

[0059] When the opening 121 of the slip 12 clamps the object to be salvaged, the serrations 122 on the inner wall of the opening 121 can increase the friction between the object to be salvaged, thereby improving the effect of the opening 121 clamping the object to be salvaged, maintaining the relative stability of the opening 121 and the object to be salvaged, and avoiding relative sliding between the opening 121 and the object to be salvaged.

[0060] In some other embodiments, the roughness of the inner wall of the opening 121 may also be increased.

[0061] In some embodiments, the serrations 122 have a tip 1221 that is offset toward an end of the slip 12 that is away from the opening 121 .

[0062] In this embodiment, the tip 1221 is offset toward the end of the slip 12 away from the opening 121 , so that when the salvaged object is inserted into the opening 121 , the saw teeth 122 will not hinder the relative movement between the salvaged object and the inner wall of the opening 121 .

[0063] After the opening 121 clamps the piece to be salvaged, the tip 1221 of the saw tooth 122 abuts against the piece to be salvaged. When the salvaging device 1 is subjected to an upward lifting force, the piece to be salvaged and the opening 121 tend to separate from each other. Since the tip 1221 of the saw tooth 122 is offset toward the end of the slip 12 away from the opening 121, there is not only friction between the saw tooth 122 and the piece to be salvaged, but also the component of the pressure applied by the saw tooth 122 on the piece to be salvaged in the axial direction of the cylinder 11 is in the same direction as the friction formed between the saw tooth 122 and the piece to be salvaged, thereby increasing the force applied by the saw tooth 122 to the piece to be salvaged to prevent the piece to be salvaged and the opening 121 from separating from each other, thereby improving the stability of the opening 121 clamping the piece to be salvaged.

[0064] In some other embodiments, the saw teeth 122 may also be trapezoidal.

[0065] Please refer again Figure 1 In some embodiments, the salvage device 1 also includes a cava seat 16 that cooperates with the opening 121. The cava seat 16 is arranged in the accommodating chamber 111 and is located on the side of the shear pin seat 13 away from the release chamber 112; when the opening 121 cooperates with the cava seat 16, the opening 121 is tightened along the radial direction of the cylinder 11.

[0066] When the object to be salvaged does not enter the accommodating chamber 111 , the opening 121 of the slip 12 cooperates with the slip seat 16 , so that the opening 121 is tightened along the radial direction of the cylinder 11 .

[0067] When the salvaged object enters the accommodating chamber 111, the slip 12 and the slip seat 16 are disengaged, so that the opening 121 expands along the radial direction of the cylinder 11, so that the salvaged object can extend into the opening 121 and slightly fit with the inner wall of the opening 121. The slightly fit means that the salvaged object and the inner wall of the opening 121 can be in a transitional fit in an interference state, and of course can also be in a smaller interference fit, which is not limited here.

[0068] When the salvage device 1 is subjected to an upward lifting force, the opening 121 of the slip 12 cooperates with the slip seat 16 again, so that the opening 121 is tightened along the radial direction of the cylinder 11, so that the salvaged object is heavily fitted with the inner wall of the opening 121. Wherein, heavily fitted means that the salvaged object and the inner wall of the opening 121 can be in a relatively large interference fit, so as to improve the stability of the opening 121 clamping the salvaged object.

[0069] In some other embodiments, the opening 121 of the cava 12 may cooperate with the inner wall of the accommodating cavity 111 formed by the cylinder 11, and the radial expansion or tightening of the opening 121 along the cylinder 11 may be achieved by changing the inner diameter of the accommodating cavity 111 in the axial direction of the cylinder 11.

[0070] Please continue reading Figure 1 In some embodiments, the cava seat 16 has a second cavity 161 and a first end 162 and a second end 163 opposite to each other, the first end 162 is located on the side of the second end 163 away from the shear pin seat 13, and the inner diameter of the second cavity 161 gradually decreases from the first end 162 toward the second end 163, and the inner wall of the second cavity 161 formed by the cava seat 16 can abut against the outer wall of the opening 121.

[0071] The working principle of this embodiment is that when the salvaged object has not entered the accommodating chamber 111 , the outer wall of the opening 121 of the slip 12 abuts against the inner wall of the second cavity 161 formed by the slip seat 16 , and the end face of the opening 121 of the slip 12 is adjacent to the second end 163 , so that the opening 121 is tightened along the radial direction of the cylinder 11 .

[0072] The cylinder 11 is placed vertically into the well with the accommodating chamber 111 on top and the releasing chamber 112 on the bottom. The object to be salvaged enters the accommodating chamber 111 through the releasing chamber 112 and passes through the first chamber 131 and the second chamber 161 in sequence.

[0073] After the salvaged object passes through the second cavity 161, the salvaged object contacts the end face of the opening 121 of the slip 12, and pushes the slip 12 away from the slip seat 16, so that the end face of the opening 121 of the slip 12 is away from the second end 163 and close to the first end 162. Since the inner diameter of the second cavity 161 gradually decreases from the first end 162 to the second end 163, the opening 121 is gradually reduced by the restraining effect of the slip seat 16 during the process of the end face of the opening 121 of the slip 12 moving away from the second end 163 and approaching the first end 162, so that the opening 121 expands along the radial direction of the cylinder 11 until the inner diameter of the opening 121 is equal to or greater than the radial dimension of the salvaged object in the cylinder 11, so that the salvaged object can extend into the opening 121 and form a light fit with the inner wall of the opening 121. The light fit has been described above and will not be repeated here.

[0074] When the object to be salvaged extends into the opening 121 and forms a light fit with the inner wall of the opening 121, the salvaging device 1 is subjected to an upward lifting force, so that the cylinder 11 drives the slip seat 16 to move upward. It can be understood that at this time, since the object to be salvaged forms a fit with the opening 121, the slip 12 moves downward relative to the cylinder 11, so that the end surface of the opening 121 of the slip 12 is again away from the first end 162 and close to the second end 163, so that the opening 121 is tightened again along the radial direction of the cylinder 11, so that a heavy fit is formed between the opening 121 and the object to be salvaged.

[0075] In some other embodiments, the inner diameter of the second cavity 161 may gradually decrease from the first end 162 toward the middle position between the first end 162 and the second end 163 , and the inner diameter of the second cavity 161 may remain unchanged from the middle position between the first end 162 and the second end 163 toward the second end 163 .

[0076] Please refer again Figure 2 In some more specific embodiments, the outer wall of the opening 121 is provided with a conical surface 1211 , and the conical surface 1211 can fit with the inner wall of the second cavity 161 formed by the slip seat 16 .

[0077] When the salvaged part has not entered the accommodating chamber 111, the conical surface 1211 of the outer wall of the opening 121 of the cava 12 fits with the inner wall of the second cavity 161 formed by the cava seat 16, which can expand the contact area between the outer wall of the opening 121 and the inner wall of the second cavity 161 formed by the cava seat 16, so as to increase the friction force formed between the outer wall of the opening 121 and the inner wall of the second cavity 161 formed by the cava seat 16, thereby avoiding the disengagement of the cava 12 and the cava seat 16 due to vibration when the barrel 11 is placed in the well.

[0078] In some other more specific implementations, the outer wall of the opening 121 may also be provided with a curved surface.

[0079] Please refer again Figure 1 In some more specific embodiments, the salvaging device 1 further comprises an elastic member 17 disposed in the accommodating chamber 111 . The elastic member 17 is compressed and arranged on a side of the slip 12 away from the slip seat 16 , and the elastic member 17 abuts against the slip 12 .

[0080] The elastic member 17 is compressed and arranged on a side of the slip 12 away from the slip seat 16 and abuts against the slip 12, so that the elastic member 17 applies an elastic force to the slip 12 toward the slip seat 16. When the salvaged object does not enter the accommodating cavity 111, the slip 12 enables the opening 121 of the slip 12 to cooperate with the slip seat 16 under the action of the elastic force.

[0081] When the salvaged object enters the accommodating chamber 111, the salvaged object abuts against the end face of the opening 121 of the slip 12, and at the same time overcomes the elastic force to push the slip 12 away from the slip seat 16, so that the slip 12 and the slip seat 16 are disengaged. After the slip 12 and the slip seat 16 are disengaged, the opening 121 expands along the radial direction of the cylinder 11, so that the salvaged object can extend into the opening 121 and be slightly engaged with the inner wall of the opening 121. The slightly engaged means that the salvaged object and the inner wall of the opening 121 can be in a transitional engagement in an interference state, and of course can also be in a smaller interference engagement, which is not limited here.

[0082] When the salvage device 1 is subjected to an upward lifting force, the cylinder 11 drives the slip seat 16 to move upward, and the slip 12 moves downward relative to the cylinder 11 under the elastic force and the force exerted on it by the salvaged object, and the slip 12 and the slip seat 16 approach each other, so that the opening 121 of the slip 12 is matched with the slip seat 16 again, and the opening 121 is tightened along the radial direction of the cylinder 11, so that the salvaged object and the inner wall of the opening 121 are matched to a greater extent. Among them, the heavier degree of matching means that the salvaged object and the inner wall of the opening 121 can be in a larger interference fit, so as to improve the stability of the opening 121 clamping the salvaged object.

[0083] In some other more specific embodiments, the elastic member 17 may also be extended and connected between the slip 12 and the slip seat 16 .

[0084] Please continue reading Figure 1In some more specific embodiments, the salvaging device 1 further includes a guide member 181 and a stopper 182. The guide member 181 is disposed in the accommodating cavity 111. The guide member 181 and the inner wall of the accommodating cavity 111 formed by the cylinder 11 are spaced apart from each other. The guide member 181 is connected to the end of the slip 12 away from the opening 121. The elastic member 17 is sleeved on the guide member 181. The stopper 182 is disposed on the guide member 181. The stopper 182 is located between the guide member 181 and the inner wall of the accommodating cavity 111 formed by the cylinder 11, and abuts against the inner wall of the accommodating cavity 111 formed by the cylinder 11. The elastic member 17 abuts against the stopper 182.

[0085] In this embodiment, the limit member 182 is connected to the guide member 181, and the limit member 182 is located between the inner wall of the accommodating cavity 111 formed by the guide member 181 and the cylinder 11, and the limit member 182 abuts against the inner wall of the accommodating cavity 111 formed by the cylinder 11, so that the guide member 181 can only move along the axial direction of the cylinder 11, and the elastic member 17 is sleeved on the guide member 181, so that the elastic member 17 can only deform along the axial direction of the cylinder 11, avoiding the elastic member 17 from deforming in other directions along the axial inclination of the cylinder 11 and causing failure.

[0086] In some other more specific embodiments, the guide member 181 may abut against the inner wall of the accommodating cavity 111 formed by the cylinder 11 , and the elastic member 17 abuts against the end surface of the guide member 181 facing away from the slip 12 .

[0087] Please continue reading Figure 1 In some embodiments, the salvage device 1 further includes an upper joint 19 connected to the cylinder 11 , and an end of the upper joint 19 away from the cylinder 11 is used to connect a continuous tubing, and a tensile limit of the continuous tubing is greater than a preset shear stress of the shear pin 14 .

[0088] The end of the upper joint 19 away from the cylinder 11 is used to connect the coiled tubing, so that the salvage device 1 can be lowered to a deeper position in the well, thereby increasing the salvage depth of the salvage device 1.

[0089] The tensile limit of the coiled tubing refers to the maximum tensile force that the coiled tubing can withstand. When the tensile force applied to the coiled tubing exceeds the tensile limit of the coiled tubing, the tensile tubing will break.

[0090] Since the tensile force limit of the coiled tubing is greater than the preset shear stress of the shear pin 14, in this embodiment, when the lifting force applied to the coiled tubing reaches the preset shear stress of the shear pin 14 and the salvaged component is not unstuck, the shear pin 14 breaks but the coiled tubing does not break, and the coiled tubing drives the barrel 11 to continue to rise, and the slip 12 is pulled into the release chamber 112 by the salvaged component and drives the slip seat 16 to move into the release chamber 112, and the opening 121 of the slip 12 expands along the radial direction of the barrel 11 to release the salvaged component, so that the coiled tubing can drive the salvage device 1 to rise and detach from the wellhead, thereby avoiding increasing the difficulty of the next salvage.

[0091] In some other embodiments, the coiled tubing may also be directly connected to the cylinder 11 .

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A salvage device capable of quantifying lost hands, characterized in that: include: A cylinder, wherein the cylinder is provided with a receiving chamber and a releasing chamber which are connected, and the inner diameter of the receiving chamber is smaller than the inner diameter of the releasing chamber; Slips, the slips are arranged in the accommodating cavity, and the openings of the slips are used to clamp the object to be salvaged in the accommodating cavity; and A shear pin seat, the shear pin seat is arranged in the accommodating cavity and is located on the side of the slip facing the release cavity, the shear pin seat has a first cavity for the salvaged piece to pass through, and the shear pin seat is connected to the cylinder through a shear pin; When the force exerted by the salvaged component on the slip is equal to or greater than the preset shear stress of the shear pin, the shear pin breaks, and the slip and the shear pin seat move to the release chamber to expand the opening along the radial direction of the cylinder and release the salvaged component.

2. The quantifiable lost hand salvage device according to claim 1, characterized in that: It also includes a guide shoe connected to the cylinder, the guide shoe has a guide cavity connected to the release cavity, the guide cavity is located on a side of the release cavity away from the accommodating cavity, and the inner diameter of the guide cavity is smaller than the inner diameter of the accommodating cavity.

3. The quantifiable lost hand salvage device according to claim 1, characterized in that: The inner wall of the opening is provided with saw teeth.

4. The quantifiable lost hand salvage device according to claim 3, characterized in that: The serrations have pointed ends that are offset toward an end of the slip away from the opening.

5. The quantifiable lost hand salvage device according to any one of claims 1 to 4, characterized in that: It also includes a slip seat that cooperates with the opening. The slip seat is arranged in the accommodating cavity and is located on a side of the shear pin seat away from the release cavity. When the opening cooperates with the slip seat, the opening is tightened along the radial direction of the cylinder.

6. The quantifiable lost hand salvage device according to claim 5, characterized in that: The cava seat has a second cavity and a first end and a second end opposite to each other. The first end is located on a side of the second end away from the shear pin seat. The inner diameter of the second cavity gradually decreases from the first end toward the second end. The inner wall of the second cavity formed by the cava seat can abut against the outer wall of the opening.

7. The quantifiable lost hand salvage device according to claim 6, characterized in that: The outer wall of the opening is provided with a conical surface, and the conical surface can fit with the inner wall of the second cavity formed by the slip seat.

8. The quantifiable lost hand salvage device according to claim 5, characterized in that: It also includes an elastic member arranged in the accommodating cavity, the elastic member is compressed and arranged on a side of the slip away from the slip seat, and the elastic member abuts against the slip.

9. The quantifiable lost hand salvage device according to claim 8, characterized in that: Also includes: A guide member, wherein the guide member is disposed in the accommodating cavity, the guide member and the cylinder body form an inner wall of the accommodating cavity and are spaced apart from each other, the guide member is connected to an end of the slip away from the opening, and the elastic member is sleeved on the guide member; and A limiting member, wherein the limiting member is arranged on the guiding member, the limiting member is located between the guiding member and the inner wall of the accommodating cavity formed by the cylinder, and abuts against the inner wall of the accommodating cavity formed by the cylinder, and the elastic member abuts against the limiting member.

10. The quantifiable lost hand salvage device according to any one of claims 1 to 4, characterized in that: It also includes an upper joint connected to the cylinder, wherein one end of the upper joint away from the cylinder is used to connect a coiled tubing, and the tensile force limit of the coiled tubing is greater than the preset shear stress of the shear pin.

Images