Retractable pressure sealing fishing socket and tool pipe string

Abstract

The utility model provides a returnable under-pressure sealing fishing cylinder and a tool pipe string, a fishing mechanism comprises a lower cylinder body and a guide shoe which are sequentially connected from top to bottom, a basket type slip is arranged in the lower cylinder body, and the guide shoe and a hole milling ring located below the basket type slip are arranged in the lower cylinder body; the sealing mechanism comprises an upper barrel body, a drawing barrel, a guide ring, a locking ring, an upper jacking steel sleeve, a sawtooth sliding sleeve, a spring and a sealing rubber barrel; the upper barrel is connected with the lower barrel; a drawing cylinder, a guide ring and an upper ejection cylinder sleeve are sequentially arranged in the upper cylinder body from top to bottom, a through hole is formed in the top of the drawing cylinder, and the drawing cylinder can move to the top of the drawing cylinder; the sawtooth sliding sleeve is located below the guide ring. The lower end of the upper jacking steel sleeve is located in the sawtooth sliding sleeve. The locking ring is mounted in the upper cylinder body; the sealing rubber barrel and the spring are sequentially arranged in the sawtooth sliding sleeve from bottom to top; the sawtooth sliding sleeve can axially move in the upper barrel body, and when the sawtooth sliding sleeve moves upwards, the lower end face of the extraction barrel compresses the guide ring, and the sealing rubber barrel is extruded to generate radial extrusion expansion. The tool pipe string comprises the fishing socket. The fishing tool is good in fishing effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas field development oil and gas field pressure operation well repair technical field, specifically, relate to a kind of retractable pressure sealing fishing barrel and tool pipe string. BACKGROUND

[0002] When oil and gas field pressure repair operation, due to corrosion in well and other reasons, complex production pipe column cannot be normally inverted operation, and part of gas well production pipe column needs to be lifted to the cavity of pressure operation device, and wellhead cutting tool is used to cut in pressure device, and the oil pipe after cutting cannot be fished using ordinary fishing tool, and the lower drill tool of pipe column cannot be effectively sealed, so it is necessary to design a kind of fishing barrel which can be fished under pressure in pressure operation device, to ensure the safe lifting of remaining completion tool. SUMMARY

[0003] The utility model aims at solving at least one of the above deficiencies in the prior art. For example, one of the purposes of the utility model is to provide a retractable pressure sealing fishing barrel with good sealing performance, simple structure and operation. For another example, another purpose of the utility model is to provide a simple structure of fishing tool pipe string.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a retractable pressure sealing fishing barrel, which can include fishing mechanism and sealing mechanism, wherein,

[0005] The fishing mechanism can include lower barrel and guide shoe connected in sequence from top to bottom, basket slips, milling hole ring and guide shoe are arranged in the lower barrel, the inner wall of the lower barrel is provided with a threaded inner conical surface matched with the basket slips, and the milling hole ring is located below the basket slips; the sealing mechanism can include upper barrel, barrel, guide ring, lock ring, upper steel sleeve, sawtooth sliding sleeve, spring and sealing rubber cylinder; the upper barrel is connected with the lower barrel; the barrel, guide ring and upper cylinder sleeve are arranged in the upper barrel in sequence from top to bottom, a through hole is formed in the top of the barrel, and the barrel can move axially in the upper barrel to the top of the barrel to abut against the stepped end face of the upper barrel; the sawtooth sliding sleeve can be arranged in the upper barrel, and the sawtooth sliding sleeve is located below the guide ring; the lower end of the upper steel sleeve is located in the sawtooth sliding sleeve; the lock ring is installed in the upper barrel, and the lock ring can be locked with the sawtooth part of the sawtooth sliding sleeve; the sealing rubber cylinder and the spring are arranged in the sawtooth sliding sleeve in sequence from bottom to top; the sawtooth sliding sleeve can move axially in the upper barrel, when the sawtooth sliding sleeve moves upward, the lower end face of the barrel compresses the guide ring, the pressure is conducted to the spring through the upper steel sleeve, the spring is compressed and deformed, and the radial extrusion of the sealing rubber cylinder can be tightly attached to the outer wall of the fish oil pipe.

[0006] According to an exemplary embodiment of the utility model, the lower end of the sealing rubber cylinder can be provided with a rubber cylinder seat, and the rubber cylinder seat is connected with the base part of the sawtooth sliding sleeve.

[0007] According to one exemplary embodiment of the present application, the sealing rubber tube can be provided with a rubber tube blocking ring at both ends.

[0008] According to one exemplary embodiment of the present application, a sealing packing can be provided in the milling hole ring.

[0009] According to one exemplary embodiment of the present application, an inner sleeve can be provided in the pulling tube.

[0010] According to one exemplary embodiment of the present application, a partition ring can be provided on the sealing rubber tube.

[0011] According to one exemplary embodiment of the present application, the through hole diameter of the top of the pulling tube can be smaller than the inner hole diameter of the fish oil pipe.

[0012] According to one exemplary embodiment of the present application, the upper top steel sleeve can be provided with a first notch boss matched with the sawtooth sliding sleeve.

[0013] According to one exemplary embodiment of the present application, the guide ring is provided with a second notch boss matched with the sawtooth sliding sleeve.

[0014] In another aspect, the present application provides a retrievable under pressure sealing tool pipe string.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] (1) The fishing tube provided by the present application can effectively seal the lower drilling tool of the pipe column, and has good sealing performance;

[0017] (2) The fishing tube provided by the present application has the functions of fishing and sealing, and has a remarkable fishing effect;

[0018] (3) The tool pipe string provided by the present application can determine whether the fishing is successful by observing the change of the suspended weight, and is convenient and accurate to operate. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects and / or characteristics of the present application will become more apparent by the following description made with reference to the accompanying drawings, in which:

[0020] Figure 1 Fig. 1 shows a structure sectional view of a retrievable under pressure sealing fishing tube according to one exemplary embodiment;

[0021] Figure 2 Fig. 2 shows a structure sectional view of a retrievable under pressure sealing fishing tube in a sealing rubber tube extrusion sealing state.

[0022] Main figure mark explanation:

[0023] 1-sealing mechanism, 101-upper barrel, 102-pulling barrel, 103-inner sleeve, 104-guide ring, 105-lock ring, 106-upper top steel sleeve, 107-sawtooth sliding sleeve, 108-spring, 109-separation ring, 1010-sealing rubber sleeve, 1011-rubber sleeve stop ring, 1012-rubber sleeve seat, 2-fishing mechanism, 201-lower barrel, 202-basket slip, 203-sealing packer, 204-milling ring, 205-guide shoe, 3-fish oil pipe. DETAILED DESCRIPTION

[0024] Hereinafter, a kind of retractable pressure sealing fishing barrel and tool pipe string of the utility model will be described in detail in conjunction with exemplary embodiments.

[0025] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of", "several" is two or more.

[0026] In the description of the present application, it needs to be understood that, unless otherwise specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to specific circumstances.

[0027] First exemplary embodiment

[0028] The present exemplary embodiment provides a retractable pressure sealing fishing barrel.

[0029] Figure 1 The structure sectional view of the retractable pressure sealing fishing barrel of one exemplary embodiment is shown; Figure 2 The structure sectional view of the retractable pressure sealing fishing barrel in the sealing rubber sleeve extrusion sealing state is shown. The retractable pressure sealing fishing barrel of the present exemplary embodiment will be described below in conjunction with Figures 1-2

[0030] In the present exemplary embodiment, as shown in Figure 1 , the fishing barrel mainly includes fishing mechanism 2 and sealing mechanism 1, wherein, as shown in Figure 1 ​Or as shown in 2, the salvage mechanism may include a lower cylinder 201 and a guide shoe 205 connected in sequence from top to bottom, and a basket slip 202, a milling ring 204 and a guide shoe 205 may be provided in the lower cylinder 201. The inner wall of the lower cylinder 201 may be provided with a threaded inner cone surface that matches the basket slip, and the finger-type key of the milling ring 204 matches the inner hole groove of the lower cylinder 201. The milling ring 204 is fixed in the lower cylinder 201 below the basket slip by the guide shoe 205, and the guide shoe 205 can be threadedly connected to the lower cylinder 201.

[0031] The sealing mechanism may include an upper cylinder 101, a pumping cylinder 102, a guide ring 104, a locking ring 105, an upper steel sleeve 106, a serrated sliding sleeve 107, a spring 108, and a sealing rubber sleeve 1010. The upper cylinder 101 is connected to the lower cylinder 201, for example, by threading. The pumping cylinder 102, the guide ring 104, and the upper cylinder sleeve 106 may be sequentially arranged in the upper cylinder 101 from top to bottom. A through hole is provided at the top of the pumping cylinder 102, which communicates with the annulus within the upper cylinder 101. During the salvage process, pressure is generated between the fish oil pipe and the sealing rubber sleeve. The through hole can transmit the pressure between the fish oil pipe and the sealing rubber sleeve 1010 to the annulus within the upper cylinder 101, helping the sealing rubber sleeve to expand the outer wall of the fish oil pipe and achieve a better sealing effect.

[0032] The extraction tube 102 can move axially within the upper cylinder 101 until the top of the extraction tube 102 presses against the stepped end surface of the upper cylinder 101. The serrated sleeve 107 is disposed within the upper cylinder 101 and is located below the guide ring 104. The lower end of the upper steel sleeve is located within the serrated sleeve 107. Specifically, the serrated sleeve 107 can include annular petal serrations and a base, and the annular petal serrations and the base are integrally configured. The locking ring 105 is installed within the upper cylinder 101. Specifically, the locking ring 105 can be sleeved between the guide ring 104 and the upper steel sleeve. The locking ring 105 can be locked with the serrated portion of the serrated sleeve 107 (i.e., the annular petal serrations of the serrated sleeve 107), thereby limiting the rebound of the sealing rubber sleeve 1010 and thereby achieving sealing of the sealing rubber sleeve 1010. The sealing rubber cylinder 1010 and the spring 108 are sequentially arranged in the serrated sleeve 107 from bottom to top; the serrated sleeve 107 can move axially in the upper cylinder 101. When the serrated sleeve 107 moves upward, the lower end surface of the extraction cylinder 102 compresses the guide ring 104, and the pressure is transmitted to the spring 108 through the upper steel sleeve 106. The spring 108 is compressed and deformed, squeezing the sealing rubber cylinder 1010 to produce radial expansion so that it can fit tightly. Figure 2 The outer wall of the fish oil pipe 3 shown in FIG.

[0033] In this exemplary embodiment, Figure 1As shown in FIG. 1 or 2, the lower end of the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101.

[0034] In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101. Figure 1 In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101.

[0035] Figure 1 In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101.

[0036] In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101. Figure 1 In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101.

[0037] Figure 1 In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101.

[0038] In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101. Figure 2 In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101.

[0039] Figure 1 In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101.

[0040] In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101. Figure 1 In the present exemplary embodiment, as shown in FIG. 1 or 2, the sealing rubber sleeve 1010 can be provided with a rubber sleeve seat 1012, which is connected with the base part of the sawtooth sliding sleeve 107, for example, threaded connection. The rubber sleeve seat 1012 cooperates with the rubber sleeve 102 and the upper sleeve body 101 to fix the sealing rubber sleeve 1010, the spring 108, the locking ring 105, the guide ring 104 and the sawtooth sliding sleeve 107 in the upper sleeve body 101.

[0041] Second exemplary embodiment​​​

[0042] The present exemplary embodiment provides a retrievable pressure sealing tool pipe string, which is a retrievable pressure sealing fishing barrel of the first exemplary embodiment.

[0043] The method for fishing the fish falling wellbore by the retrievable pressure sealing fishing barrel provided by the present utility model can comprise:

[0044] When fishing the fish falling tubing, the retrievable sealing fishing barrel approaches the fish falling tubing in the wellbore, rotates right slowly, and lowers the tool, the fish falling tubing in the wellbore enters the milled hole ring and the basket slips through the guide shoe. The basket slip is first pushed upward and then expanded to allow the fish falling tubing to pass through.

[0045] After the fish falling tubing passes through the basket slip, the fish falling tubing continues to ascend and press against the end face of the barrel step, at this time, the downward pressure is continuously applied, the barrel freely ascends along the inner wall of the upper barrel under the pushing force of the fish falling tubing and presses against the end face of the upper barrel, the sawtooth sliding sleeve ascends, the lower end face of the barrel compresses the guide ring, the pressure is transmitted to the spring through the upper pressing steel sleeve to make the spring compress and deform, and then the radial extrusion force of the sealing rubber cylinder is generated to make the sealing rubber cylinder tightly adhere to the outer wall of the fish falling tubing, the locking ring and the ring-shaped split sawtooth of the sawtooth sliding sleeve are locked, the elastic recovery of the sealing rubber cylinder is limited, and thus the sealing is realized. When the barrel ascends to the limit of the end face of the upper barrel, the suspended weight display is reduced, the pipe column is lifted, the basket slip bites the fish falling tubing in the wellbore and does not move, and the basket slip is in contact with the threaded taper surface of the lower barrel. The greater the load is lifted, the tighter the basket slip bites the fish falling tubing in the wellbore. At the same time, the sealing rubber cylinder keeps sealing to the outer wall of the fish falling tubing.

[0046] According to the needs of construction, if the retrievable pressure sealing fishing barrel needs to be withdrawn and the fish falling tubing in the wellbore needs to be released, the fishing barrel is struck downward as a whole, and then the tool pipe column is lifted while the fishing barrel is slowly rotated right, so that the fishing barrel can be withdrawn. Here, the purpose of the downward striking is to make the threaded taper surface of the basket slip separate from the inner threaded taper surface of the barrel. The purpose of the right rotation is to make the basket slip always in the expanded state by using the friction force between the basket slip and the casing or tubing in the wellbore, so as to facilitate the withdrawal of the fish falling tubing in the wellbore.

[0047] In summary, the present utility model has at least one of the following advantages:

[0048] (1) The fishing barrel provided by the present utility model has simple structure, is safe and reliable, and has high fishing success rate;

[0049] (2) The tool pipe string provided by the present utility model can not only be used as a conventional sealing fishing tool to perform operation in the wellbore, but also can be combined with other tools to realize complex pipe string cutting and fishing under pressure in the cavity of the under-pressure operation equipment device;

[0050] (3) The tool pipe string provided by the utility model can continue downhole operation after being pulled out of the well mouth through simple inspection and maintenance.

[0051] Although the above has described the utility model's one kind can retreat type pressure seal fishing socket and tool pipe string by combining with example embodiment, but the person skilled in the art should be clear that can make various modifications and changes to the example embodiment of the utility model without departing from the spirit and scope defined by the claims.

Claims

1. A retrievable, belted pressure seal fishing socket, characterized in that, The fishing tool comprises a fishing mechanism and a sealing mechanism, wherein The fishing mechanism comprises a lower barrel and a leading shoe connected in sequence from top to bottom, and a basket slip, a milling hole ring and the leading shoe are arranged in the lower barrel, a threaded inner conical surface matched with the basket slip is arranged on the inner wall of the lower barrel, and the milling hole ring is located below the basket slip; The sealing mechanism comprises an upper barrel, a pulling barrel, a guide ring, a locking ring, an upper top steel sleeve, a sawtooth sliding sleeve, a spring and a sealing rubber sleeve; the upper barrel is connected with the lower barrel; the pulling barrel, the guide ring and the upper top cylinder sleeve are arranged in sequence from top to bottom in the upper barrel, a through hole is formed in the top of the pulling barrel, the pulling barrel can move axially in the upper barrel to the top of the pulling barrel to abut against the stepped end surface of the upper barrel; the sawtooth sliding sleeve is arranged in the upper barrel and located below the guide ring, the lower end of the upper top steel sleeve is located in the sawtooth sliding sleeve; the locking ring is installed in the upper barrel and can be locked with the sawtooth part of the sawtooth sliding sleeve; the sealing rubber sleeve and the spring are arranged in the sawtooth sliding sleeve in sequence from bottom to top; the sawtooth sliding sleeve can move axially in the upper barrel, when the sawtooth sliding sleeve moves upward, the lower end surface of the pulling barrel compresses the guide ring, the pressure is conducted to the spring through the upper top steel sleeve, the spring is compressed and deformed, the sealing rubber sleeve is extruded to produce radial extrusion to tightly adhere to the outer wall of the fish oil pipe.

2. The retrievable band seal socket of claim 1, wherein, The lower end of the sealing rubber sleeve is provided with a rubber sleeve seat connected with the base part of the sawtooth sliding sleeve.

3. The retrievable band seal socket of claim 1, wherein, Rubber sleeve retaining rings are arranged at both ends of the sealing rubber sleeve.

4. The retrievable band seal socket of claim 1, wherein, A sealing disc is arranged in the milling hole ring.

5. The retrievable band seal socket of claim 1, wherein, An inner sleeve is arranged in the pulling barrel.

6. The retrievable band seal socket of claim 1, wherein, A partition ring is sleeved on the sealing rubber sleeve.

7. The retrievable band seal socket of claim 1, wherein, The through hole in the top of the pulling barrel has a smaller diameter than the inner diameter of the fish oil pipe.

8. The retrievable band seal socket of claim 1, wherein, The upper top steel sleeve is provided with a first notch boss matched with the sawtooth sliding sleeve.

9. The retrievable band seal socket of claim 1, wherein, The guide ring is provided with a second notch boss matched with the sawtooth sliding sleeve.

10. A retractable band seal tool pipe string characterized by, The retrievable pressure-bearing tool pipe string comprises the retrievable pressure-bearing sealing fishing tool according to any one of claims 1-9.

Images