Blockage introducer and connecting oil pipe

Abstract

The utility model relates to a blockage guiding device and a connecting oil pipe, and relates to the technical field of oil and gas exploitation. The blockage guiding device comprises a slip, a mandrel and a driving assembly, a fixing part is arranged at one end of the slip, and a sealing step face used for abutting against the coiled tubing is arranged on the outer wall of the slip. The core shaft is movably arranged in the slip, and a shaft hole penetrating through the core shaft in the axial direction is formed in the core shaft; the driving assembly is arranged on the core shaft, and the driving assembly is configured to enable the slips and the core shaft to relatively move in the axial direction, so that the core shaft changes the outer diameter of the fixing part; the plug is arranged at one end of the shaft hole and can plug the shaft hole; or the device further comprises a guiding assembly which is arranged on the driving assembly and is configured to be capable of guiding. According to the technical scheme, the problem that liquid in the continuous oil pipe overflows can be solved, and the problem that the continuous oil pipe is difficult to penetrate into the injection head can also be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil and natural gas exploitation, in particular to a plugging guide and connecting oil pipe. BACKGROUND

[0002] Coiled tubing equipment is widely applied to the development of shale oil and shale gas well because of its high speed flexibility, quick installation and continuous construction under pressure. In oil and gas exploitation operation, no matter after the construction is completed or before the construction is prepared, there are liquid (well killing fluid, chemical material) in the used coiled tubing. Therefore, when the coiled tubing is collected and pulled out, the liquid will be spilled on the ground, which will cause harm to the environment. In addition, because the strength and elasticity of the coiled tubing are relatively large, the natural bending arc is large, and it is difficult for the head of the coiled tubing to penetrate into the injection head, which consumes time and energy. Therefore, a device is needed to solve the problems of liquid overflow in the coiled tubing and difficulty in penetrating the coiled tubing into the injection head. SUMMARY

[0003] The utility model embodiment provides a kind of plugging guide and connecting oil pipe, not only can solve the problem of liquid overflow in the coiled tubing, but also can solve the problem of difficulty in penetrating the coiled tubing into the injection head.

[0004] In the first aspect, the utility model embodiment provides a kind of plugging guide, comprising:

[0005] Slips, one end is provided with fixed part, the outer wall of the slip is provided with sealing step surface for being in abutment with coiled tubing;

[0006] Core shaft, movably arranged in the slip, the core shaft is provided with shaft hole in the axial direction through the core shaft;

[0007] Drive assembly, it is set up on the core shaft, the drive assembly is configured to enable the slip and the core shaft to move relatively in the axial direction, so that the core shaft changes the outer diameter of the fixed part;

[0008] Wherein, it further includes the plug that is set up in one end of the shaft hole and is configured to be able to plug the shaft hole;Or further include guide assembly that is set up on the drive assembly and is configured to be able to guide.

[0009] In one embodiment, the fixed part includes a plurality of chutes provided on the slip, a plurality of the chutes are arranged equidistantly around the slip in the circumferential direction, and the chute penetrates the slip in the radial direction;Wherein, a plurality of protrusions are provided on the outer wall of the fixed part.

[0010] In one embodiment, the outer diameter of the core shaft gradually decreases along the axial direction, so that the core shaft is conical;

[0011] The outer wall of the mandrel is provided with a plurality of sliding blocks, the plurality of sliding blocks are arranged at equal intervals around the mandrel in the circumferential direction, the plurality of sliding blocks are respectively one-to-one corresponding to the plurality of sliding grooves, and the sliding blocks are matched with the corresponding sliding grooves.

[0012] In one embodiment, the driving assembly comprises:

[0013] A locking nut is threadedly connected with the mandrel; and

[0014] A gasket is sleeved on the mandrel, and two ends of the gasket are respectively abutted with the slip and the locking nut.

[0015] In one embodiment, the plug is threadedly connected with the shaft hole.

[0016] In one embodiment, the driving assembly comprises a driving rod, one end of the driving rod extends into the shaft hole and is threadedly connected with the shaft hole.

[0017] In one embodiment, one end of the guide assembly is rotationally connected with the driving rod, and the other end is provided with a guide surface.

[0018] In one embodiment, the guide assembly comprises:

[0019] A pressing cap is rotationally connected with the driving rod;

[0020] A connecting head extends into the pressing cap and is threadedly connected with the pressing cap;

[0021] A guide body, one end of the connecting head away from the pressing cap extends into the guide body and is threadedly connected with the guide body,

[0022] A locking seat is arranged in the guide body, and two ends of the locking seat are respectively abutted with the guide body and the connecting head;

[0023] The outer diameter of the end of the guide body away from the connecting head gradually decreases along the axial direction, so as to form the guide surface.

[0024] In one embodiment, one end of the driving rod away from the mandrel is provided with a driving ball, and the pressing cap is provided with a transmission hole matched with the driving ball.

[0025] In a second aspect, the utility model provides a connecting oil pipe, which comprises the plug guide as described above.

[0026] Compared with the prior art, the advantages of the utility model lie in when the coiled tubing is collected and pulled out, the plug is installed on the mandrel, the driving assembly is used for moving the slip along the axial direction, the mandrel changes the outer diameter of the fixed part, the outer diameter of the fixed part is enlarged, the fixed part can be tightly abutted with the inner wall of the coiled tubing, the plug guide is fixed in the coiled tubing, the slip is abutted with the coiled tubing and the plug blocks the shaft hole, so that the coiled tubing is blocked, and the liquid in the coiled tubing is prevented from flowing out to pollute the environment; when the coiled tubing is inserted into the injection head, the driving assembly and the guide assembly are installed on the mandrel, the driving assembly is used for moving the mandrel along the axial direction, the mandrel changes the outer diameter of the fixed part, the outer diameter of the fixed part is enlarged, the fixed part can be tightly abutted with the inner wall of the coiled tubing, the plug guide is fixed in the coiled tubing, the guide assembly plays a guiding role, the difficulty of the coiled tubing being inserted into the injection head is reduced, so that the blowout preventer is protected and the wear of the blowout preventer is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] The utility model will be described in more detail below based on the embodiments and with reference to the drawings.

[0028] Figure 1 is the structure schematic diagram of the plug guide provided by an embodiment of the utility model;

[0029] Figure 2 is Figure 1 the sectional view along A-A direction;

[0030] Figure 3 is the structure schematic diagram of the plug guide provided by another embodiment of the utility model;

[0031] Figure 4 is Figure 3 the sectional view along B-B direction.

[0032] Reference signs:

[0033] 10, slip; 110, fixed part; 1101, sliding groove; 1102, protrusion; 120, sealing step surface;

[0034] 20, mandrel; 210, shaft hole; 220, sliding block;

[0035] 30, driving assembly; 310, locking nut; 320, gasket; 330, driving rod; 3301, driving ball;

[0036] 40, plug;

[0037] 50. Guide assembly; 510. Pressure cap; 520. Connector; 530. Guide body; 5301. Guide surface; 540. Locking seat. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings.

[0039] Coiled tubing equipment, with its advantages of high speed, flexibility, quick installation, and continuous pressurized operation, is widely used in the development of shale oil and shale gas wells. During oil and gas extraction operations, coiled tubing is retrieved and pulled out using a tubing drum. However, whether after operation or during pre-operation preparation, used coiled tubing always contains liquids (such as kill fluid and chemicals). Therefore, liquid spillage occurs during retrieval and pull-out, causing environmental harm. Furthermore, after being pulled from the tubing drum, the coiled tubing needs to be inserted into the injection head inlet. However, due to the high strength and elasticity of coiled tubing, its natural bending radius is large, making it difficult and time-consuming to insert the tubing head into the injection head. Therefore, there is an urgent need for a device that can solve both the problem of liquid spillage from the coiled tubing and the difficulty of inserting the tubing into the injection head.

[0040] Example 1

[0041] like Figures 1-4 As shown, in order to solve the above-mentioned technical problems, this utility model provides a blocking guide, including a slip 10, a spindle 20, and a drive assembly 30; one end of the slip 10 is provided with a fixing part 110, and the outer wall of the slip 10 is provided with a sealing step surface 120 for abutting against the continuous tubing; the spindle 20 is movably disposed in the slip 10, and the spindle 20 is provided with a shaft hole 210 that passes through the spindle 20 in the axial direction; the drive assembly 30 is disposed on the spindle 20, and the drive assembly 30 is configured to enable the slip 10 and the spindle 20 to move relative to each other in the axial direction, so that the outer diameter of the fixing part 110 of the spindle 20 is changed; wherein, it also includes a plug 40 disposed at one end of the shaft hole 210 and configured to block the shaft hole 210; or it also includes a guide assembly 50 disposed on the drive assembly 30 and configured to guide.

[0042] As can be seen from the above, when the coiled tubing is collected and pulled out, the plug 40 is installed on the mandrel 20, the driving assembly 30 drives the slip 10 to move in the axial direction, the mandrel 20 changes the outer diameter of the fixed part 110, the outer diameter of the fixed part 110 is increased, so that the fixed part 110 can be tightly abutted with the inner wall of the coiled tubing, the plug guide is fixed in the coiled tubing, the slip 10 is abutted with the coiled tubing and the plug 40 plugs the shaft hole 210, so as to plug the coiled tubing and avoid the liquid in the coiled tubing from flowing out to pollute the environment; when the coiled tubing penetrates into the injection head, the driving assembly 30 and the guide assembly 50 are installed on the mandrel 20, the driving assembly 30 drives the mandrel 20 to move in the axial direction, the mandrel 20 changes the outer diameter of the fixed part 110, the outer diameter of the fixed part 110 is increased, so that the fixed part 110 can be tightly abutted with the inner wall of the coiled tubing, the plug guide is fixed in the coiled tubing, the guide assembly 50 plays a guiding role, the difficulty of the coiled tubing penetrating into the injection head is reduced, so as to protect the blowout preventer and reduce the wear of the blowout preventer. In summary, the plug guide not only avoids the environmental risk caused by the overflow of the liquid in the coiled tubing, but also solves the problems of time and labor consumption caused by the penetration of the coiled tubing into the injection head.

[0043] It should be noted that when the coiled tubing is collected and pulled out, the plug as the plug guide of the coiled tubing avoids the overflow of the liquid, and the sealing step surface 120 must be sealed and fitted with the end surface of the coiled tubing to effectively avoid the overflow of the liquid; when the coiled tubing penetrates into the injection head, as the guide of the coiled tubing, the sealing and fitting problem does not need to be considered.

[0044] It should be further noted that when the plug guide is used as the plug of the coiled tubing, the outer wall of the mandrel 20 is provided with a first sealing groove, and a sealing ring can be arranged in the first sealing groove to improve the sealing between the mandrel 20 and the slip 10 and avoid the liquid in the coiled tubing from flowing out between the mandrel 20 and the slip 10.

[0045] Embodiment two

[0046] As shown in Figures 1-4 The plug guide includes a slip 10, a mandrel 20 and a driving assembly 30; one end of the slip 10 is provided with a fixed part 110, and the outer wall of the slip 10 is provided with a sealing step surface 120 for abutting with the coiled tubing; the mandrel 20 is movably arranged in the slip 10, and the mandrel 20 is provided with a shaft hole 210 penetrating through the mandrel 20 in the axial direction; the driving assembly 30 is arranged on the mandrel 20, and the driving assembly 30 is configured to enable the slip 10 and the mandrel 20 to relatively move in the axial direction, so that the mandrel 20 changes the outer diameter of the fixed part 110; wherein, a plug 40 is arranged at one end of the shaft hole 210 and is configured to plug the shaft hole 210; or a guide assembly 50 is further arranged on the driving assembly 30 and is configured to guide.

[0047] As can be seen from the above, when the coiled tubing is collected and pulled out, the plug 40 is installed on the mandrel 20, the driving assembly 30 drives the slip 10 to move in the axial direction, the mandrel 20 changes the outer diameter of the fixed part 110, the outer diameter of the fixed part 110 is increased, so that the fixed part 110 can be tightly abutted with the inner wall of the coiled tubing, the plug guide is fixed in the coiled tubing, the slip 10 is abutted with the coiled tubing, and the plug 40 plugs the shaft hole 210, so that the coiled tubing is plugged, and the liquid in the coiled tubing is prevented from flowing out to pollute the environment; when the coiled tubing penetrates into the injection head, the driving assembly 30 and the guide assembly 50 are installed on the mandrel 20, the driving assembly 30 drives the mandrel 20 to move in the axial direction, the mandrel 20 changes the outer diameter of the fixed part 110, the outer diameter of the fixed part 110 is increased, so that the fixed part 110 can be tightly abutted with the inner wall of the coiled tubing, the plug guide is fixed in the coiled tubing, the guide assembly 50 plays a guiding role, the difficulty of the coiled tubing penetrating into the injection head is reduced, and thus the blowout preventer is protected and the wear of the blowout preventer is reduced. In summary, the coiled tubing not only avoids the environmental risk caused by the overflow of the liquid in the coiled tubing, but also solves the problems of time consumption and labor consumption when the coiled tubing penetrates into the injection head.

[0048] It should be noted that when the coiled tubing is collected and pulled out, the plug as the coiled tubing avoids the overflow of the liquid, and the sealing step surface 120 must be sealed and fitted to the end surface of the coiled tubing to effectively prevent the liquid from overflowing; when the coiled tubing penetrates into the injection head, the guide as the coiled tubing does not need to consider the sealing and fitting problem.

[0049] It should be further noted that when the plug as the coiled tubing, the outer wall of the mandrel 20 is provided with a first sealing groove, and a sealing ring can be arranged in the first sealing groove, so as to improve the sealing between the mandrel 20 and the slip 10 and prevent the liquid in the coiled tubing from flowing out between the mandrel 20 and the slip 10.

[0050] As shown in Figure 1 some embodiments, the fixed part 110 includes a plurality of sliding grooves 1101 arranged on the slip 10, the plurality of sliding grooves 1101 are arranged at equal intervals in the circumferential direction of the slip 10, and the sliding grooves 1101 penetrate the slip 10 in the radial direction; wherein the outer wall of the fixed part 110 is provided with a plurality of protrusions 1102.

[0051] As shown in Figure 1 some embodiments, the outer diameter of the mandrel 20 gradually decreases in the axial direction, so that the mandrel 20 is conical; wherein the outer wall of the mandrel 20 is provided with a plurality of sliding blocks 220, the plurality of sliding blocks 220 are arranged at equal intervals in the circumferential direction of the mandrel 20, the plurality of sliding blocks 220 respectively correspond to the plurality of sliding grooves 1101 one by one, and the sliding blocks 220 cooperate with the corresponding sliding grooves 1101.

[0052] The sliding connection between the mandrel 20 and the slip 10 is realized by arranging a plurality of sliding grooves 1101 on the slip 10 and a sliding block 220 matched with the sliding grooves 1101 on the mandrel 20; when the mandrel 20 and the slip 10 move relatively, the fixed part 110 can be opened and the diameter of the fixed part 110 is enlarged, so as to be abutted against the inner wall of the coiled tubing and fix the slip 10 in the coiled tubing; in addition, a plurality of protrusions 1102 are arranged on the outer wall of the fixed part 110 to increase the friction between the fixed part 110 and the coiled tubing and enhance the reliability of the fixation.

[0053] It should be noted that the sliding grooves 1101 are parallel to the axial direction and the sliding grooves 1101 are matched with the sliding block 220 in shape.

[0054] It should be further noted that, as shown in Figures 1-4 , the outer diameter of the upper end of the mandrel 20 is larger than that of the lower end of the mandrel 20, so that when the mandrel 20 moves downward in the axial direction relative to the slip 10 or the slip 10 moves upward in the axial direction relative to the mandrel 20, the mandrel 20 opens the fixed part 110 and the diameter of the fixed part 110 is enlarged.

[0055] As shown in Figure 1 , Figure 2 , in some embodiments, the driving assembly 30 comprises a locking nut 310 and a gasket 320; the locking nut 310 is threadedly connected with the mandrel 20; the gasket 320 is sleeved on the mandrel 20 and the two ends of the gasket 320 are respectively abutted against the slip 10 and the locking nut 310.

[0056] By rotating the locking nut 310 to push the gasket 320 and the slip 10 to move upward, the relative movement between the slip 10 and the mandrel 20 occurs, the outer diameter of the upper end of the mandrel 20 is enlarged, the fixed part 110 is opened and tightly abutted against the inner wall of the coiled tubing.

[0057] It should be noted that the number of the gasket 320 can be multiple and is arranged according to specific needs, which is not limited in the utility model.

[0058] As shown in Figure 2 , in some embodiments, the plug 40 is threadedly connected with the shaft hole 210.

[0059] It should be noted that the outer wall of the plug 40 is provided with a second sealing groove, a sealing ring can be arranged in the second sealing groove to improve the sealing between the plug 40 and the mandrel 20 and avoid the liquid in the coiled tubing from flowing out from between the plug 40 and the mandrel 20.

[0060] As shown in Figure 4 , in some embodiments, the driving assembly 30 comprises a driving rod 330, one end of the driving rod 330 extends into the mandrel 20 and is threadedly connected with the mandrel 20.

[0061] The drive rod 330 is threadedly connected to the spindle 20. Rotating the drive rod 330 causes the spindle 20 to move downward, causing relative movement between the slip 10 and the spindle 20. The outer diameter of the upper end of the spindle 20 is large, causing the fixing part 110 to open and bite the inner wall of the continuous tubing.

[0062] like Figure 4 As shown, in some embodiments, one end of the guide assembly 50 is rotatably connected to the drive rod 330 and the other end is provided with a guide surface 5301.

[0063] One end of the guide assembly 50 is rotatably connected to the drive rod 330, allowing the guide assembly 50 to rotate relative to the spindle 20 and the slip 10, thus facilitating the guidance of the guide assembly 50. At the same time, the guide surface 5301 plays a guiding role, allowing the head of the connecting oil pipe to be smoothly inserted into the injection head, improving work efficiency and saving time and effort.

[0064] like Figure 3 , Figure 4 As shown, in some embodiments, the guide assembly 50 includes a pressure cap 510, a connector 520, a guide body 530, and a locking seat 540; the pressure cap 510 is rotatably connected to the drive rod 330; one end of the connector 520 extends into the pressure cap 510 and is threadedly connected to the pressure cap 510; the end of the connector 520 away from the pressure cap 510 extends into the guide body 530 and is threadedly connected to the guide body 530; the locking seat 540 is disposed in the guide body 530, and both ends of the locking seat 540 abut against the guide body 530 and the connector 520, respectively; wherein, the outer diameter of the end of the guide body 530 away from the connector 520 gradually decreases along the axial direction to form a guide surface 5301.

[0065] The connector 520 is threadedly connected to the pressure cap 510 and the guide body 530 respectively, making disassembly and assembly convenient; the locking seat 540 is connected to the traction rope (such as a steel wire rope) to guide the continuous tubing into the injection head.

[0066] It should be noted that the outer diameter of the upper end of the guide surface 5301 is larger than the outer diameter of the lower end of the guide surface 5301.

[0067] It should also be noted that the end faces of the pressure cap 510 and the guide body 530 are provided with chamfers or rounded corners to ensure that other components are not damaged when the injection head is inserted or removed.

[0068] It should also be noted that the guide body 530 is provided with a stepped hole, and the locking seat 540 is matched with the shape of the stepped hole.

[0069] like Figure 4As shown, in some embodiments, the driving rod 330 is provided with a driving ball 3301 at one end away from the mandrel 20, wherein the pressure cap 510 is provided with a driving hole matched with the driving ball 3301.

[0070] By providing the driving ball 3301 and the driving hole matched with the driving ball 3301, the rotation connection between the driving rod 330 and the pressure cap 510 is realized, so that the driving rod 330 and the pressure cap 510 can relatively swing at a small angle.

[0071] When the coiled tubing is received, pulled out, and the plugger as the coiled tubing avoids liquid overflow, the fixed part 110 is aligned with the coiled tubing and pushed into the coiled tubing, after being pushed into place, the locking nut 310 is rotated, and the fixed part 110 is opened and clamped on the inner wall of the coiled tubing; before the slip 10 is loosened, it is checked whether there is residual pressure in the coiled tubing; the locking nut 310 and the gasket 320 are removed, the transmission assembly and the guide assembly 50 are installed on the mandrel 20, and the plugger can be used as a guide for the coiled tubing.

[0072] Embodiment three

[0073] The utility model embodiment further provides a connecting oil pipe, including the plugger guide of any embodiment of the utility model, and then has all the technical effects brought by the technical scheme of the above-mentioned embodiment.

[0074] Although the utility model has been described with reference to the preferred embodiments, various improvements can be made and the components therein can be replaced with equivalents without departing from the scope of the utility model. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An occlusion guide, characterized in that, The application relates to a plug guide device, comprising: a slip, one end of which is provided with a fixed part, and a sealing step surface for abutting against a coiled tubing is arranged on the outer wall of the slip; a mandrel movably arranged in the slip, and an axial hole penetrating through the mandrel in the axial direction is arranged on the mandrel; a driving assembly arranged on the mandrel, the driving assembly being configured to enable relative movement of the slip and the mandrel in the axial direction, so that the mandrel changes the outer diameter of the fixed part; wherein a plug is arranged at one end of the axial hole and is configured to block the axial hole; or a guide assembly is arranged on the driving assembly and is configured to guide.

2. The occlusion guide of claim 1, wherein, The fixed part comprises a plurality of sliding grooves arranged on the slip, the sliding grooves are equidistantly arranged around the slip in the circumferential direction, and the sliding grooves penetrate through the slip in the radial direction; wherein a plurality of protrusions are arranged on the outer wall of the fixed part.

3. The occlusion guide of claim 2, wherein, The outer diameter of the mandrel gradually decreases in the axial direction, so that the mandrel is conical; wherein a plurality of sliding blocks are arranged on the outer wall of the mandrel, the sliding blocks are equidistantly arranged around the mandrel in the circumferential direction, the sliding blocks are one-to-one corresponding to the sliding grooves respectively, and the sliding blocks cooperate with the corresponding sliding grooves.

4. The occlusion guide of any one of claims 1-3, wherein, The driving assembly comprises: a locking nut in threaded connection with the mandrel; and a gasket sleeved on the mandrel, two ends of the gasket abutting against the slip and the locking nut respectively.

5. The occlusion guide of claim 1, wherein, The plug is in threaded connection with the axial hole.

6. The occlusion guide of any one of claims 1-3, wherein, The driving assembly comprises a driving rod, one end of the driving rod extending into the axial hole and being in threaded connection with the axial hole.

7. The occlusion guide of claim 6, wherein, One end of the guide assembly is in rotational connection with the driving rod, and the other end is provided with a guide surface.

8. The occlusion guide of claim 7, wherein, The guide assembly comprises: a pressing cap in rotational connection with the driving rod; a connecting head, one end of the connecting head extending into the pressing cap and being in threaded connection with the pressing cap; a guide body, one end of the connecting head away from the pressing cap extending into the guide body and being in threaded connection with the guide body, a locking seat arranged in the guide body, two ends of the locking seat abutting against the guide body and the connecting head respectively; wherein the outer diameter of one end of the guide body away from the connecting head gradually decreases in the axial direction, so as to form the guide surface.

9. The occlusion guide of claim 8, wherein, One end of the driving rod away from the mandrel is provided with a driving ball, wherein a transmission hole matched with the driving ball is arranged in the pressing cap.

10. A connecting oil pipe, characterized by The application further relates to a plug guide device comprising the plug guide device according to any one of claims 1-9.

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