Internal control combined device for oil pipe lifting and spraying

Abstract

The present application discloses an internal control combined device for lifting and lowering oil pipes and spraying, and relates to the field of petroleum engineering. One end of the oil pipe hanger in the device is connected to the lower connecting short section, and the other end is connected to one end of the slotted short section, the other end of the slotted short section is connected to one end of the pipe clamp, and the other end of the pipe clamp is connected to the flow control valve; the outer surface of the oil pipe hanger is sleeved with a sealing component; the outer wall of the slotted short section is sleeved with a flow shielding disc, a flow shielding eaves and a lock key sleeve, and the thickened body part on the outer wall of the slotted short section connected to the oil pipe hanger includes a right-angle groove, and the right-angle groove is adapted to the convex key provided in the inner cavity of the lock key sleeve; a flow shielding eaves is provided between the height limiting positioning column connected to one side of the first end face of the flow shielding disc and the height setting pin barrel connected to the other side of the first end face of the flow shielding disc, and a lock key sleeve is provided inside the flow shielding eaves; a limited height convex circle is provided on the height limiting positioning column, and the second end face of the flow shielding disc is connected to the first handle and the second handle; the positioning pin is inserted into the height setting pin barrel from the second end face of the flow shielding disc. The device is simple to make, ingenious to combine, and safe to use.

Description

Technical Field

[0001] The present application relates to the field of petroleum engineering, and in particular to an internal control combined device for lifting and lowering oil pipes for rapid spraying. Background Art

[0002] During the process of raising and lowering the oil pipe at the underground operation site of the oil field, once the annulus overflow of the oil pipe or the oil pipe casing occurs, the staff will think that a blowout is about to occur and that well control needs to be implemented immediately.

[0003] The general method of implementing well control is to lower the blowout prevention assembly into the tubing before the eruption. The blowout prevention assembly mainly includes a double male nipple, a tubing hanger, a lifting nipple and a plug valve. The double male nipple is used to connect the tubing in the well, the tubing hanger is used to sit in the four-way tapered cavity of the wellhead tubing head, and the plug valve is used to control the inner cavity of the tubing.

[0004] In the process of implementing the technical solution of the embodiment of the present application, the inventors of the present application found that the related technology has at least the following problems:

[0005] (1) Low safety. When the double male nipple of the blowout preventer assembly is connected to the oil pipe coupling in the well, the oil pipe in the well overflows or even sprays, which directly affects the vision and breathing functions of the operators, resulting in slow connection speed or even failure to implement; the double male nipple of the blowout preventer assembly is connected to the oil pipe coupling in the well through threads, and the pipe clamp is used to rotate and tighten when connecting. The double dies of the pipe clamp are set opposite to each other, and the dies at both ends of the pipe clamp are used to clamp the symmetrical points of the oil pipe diameter to achieve effective clamping. If the dies are blunt or the two operators are not stable when rotating the pipe clamp, it is very easy to slip when the symmetrical points of the clamping force do not exceed the symmetrical points of the oil pipe diameter, causing the operators to fall;

[0006] (2) Multiple people are needed to work together. When the blowout preventer assembly is lowered into the four-way conical cavity of the tubing head, in order to prevent the tubing blowout preventer from getting hung up and rubbing the rubber seal ring on the tubing hanger, the blowout preventer assembly must be straightened by manual pushing and pulling, lever prying, etc., but more than two people are required to work together, and it is often difficult to ensure timely support in the event of an emergency blowout. Summary of the invention

[0007] The present application provides an internal control combination device for lifting and lowering oil pipes for emergency spraying, which is used to improve the safety of operators, while solving the problem of requiring multiple people to collaborate in emergency spraying, thereby improving work efficiency.

[0008] This application provides the following technical solutions:

[0009] A combined internal control device for lifting and lowering oil pipes for spraying, the device comprising: a lower connecting nipple 1, an oil pipe hanger 2, a sealing component 3, a slotted nipple 4, a height limiting positioning column 5, a flow blocking plate 6, a first handle 7, a pipe clamp 8, a flow control valve 9, a second handle 10, a positioning pin 11, a flow blocking eave 12, a height-fixing pin barrel 13 and a lock key sleeve 14;

[0010] Among them, one end of the tubing hanger 2 is connected to the lower connecting short section 1, and the other end is connected to one end of the slotted short section 4, the other end of the slotted short section 4 is connected to one end of the pipe clamp 8, and the other end of the pipe clamp 8 is connected to the flow control valve 9;

[0011] The outer surface of the tubing hanger 2 is sleeved with a sealing component 3; the outer wall of the slotted short section 4 is sleeved with a flow shielding plate 6, a flow shielding eave 12 and a lock key sleeve 14; the outer wall of the slotted short section 4 connected to the tubing hanger 2 includes a thickened body part, and the outer wall of the thickened body part has a right-angle groove 402, which is matched with the convex key 1401 on the inner cavity of the lock key sleeve 14;

[0012] One side of the first end face of the flow-blocking disk 6 is connected to a height-limiting positioning column 5, and a limited height convex circle 501 is provided on the height-limiting positioning column 5. The other side of the first end face of the flow-blocking disk 6 is connected to a height-fixing pin cylinder 13. There is a flow-blocking eaves 12 between the height-limiting positioning column 5 and the height-fixing pin cylinder 13, and there is a lock key sleeve 14 inside the flow-blocking eaves 12. The second end face of the flow-blocking disk 6 is connected to a first handle 7 and a second handle 10. The positioning pin 11 is inserted into the height-fixing pin cylinder 13 from the second end face of the flow-blocking disk 6.

[0013] Optionally, the slotted nipple 4 is connected to the tubing hanger 2 via a thickened tubing thread 403 , and the slotted nipple 4 is connected to the pipe clamp 8 via a body thread 401 .

[0014] Optionally, the sealing component 3 is an elastic O-ring embedded in a groove on the outer wall of the conical body of the tubing hanger 2 .

[0015] Optionally, the slotted short section 4 is a hollow tube, and the depth of the right-angle groove 402 is less than the thickness of the thickened body portion.

[0016] Optionally, the right-angle groove 402 is divided into a longitudinal track and a transverse track, and the distance from the bottom plane of the height-limiting convex circle 501 to the bottom plane of the lock key sleeve 14 is greater than the distance from the lower plane of the sealing component 3 to the top of the longitudinal track of the right-angle groove 402 .

[0017] Optionally, the diameter of the flow shielding plate 6 is matched with the diameter of the upper flange of the tubing blowout preventer.

[0018] Optionally, the flow shielding eaves 12 are longitudinally annular, and the inner diameter of the flow shielding eaves 12 is larger than the through hole diameter of the oil pipe blowout preventer.

[0019] Optionally, the height-setting pin cylinder 13 is a hollow cylinder, and the center distance between the height-setting pin cylinder 13 and the height-limiting positioning column 5 is equal to the diagonal screw hole distance at 180 degrees on the upper flange of the tubing blowout preventer.

[0020] Optionally, the inner diameter of the locking key sleeve 14 is larger than the outer diameter of the thickened body of the outer wall of the slotted short section 4 , and the height of the protruding key 1401 toward the axis of the locking key sleeve 14 is smaller than the depth of the right-angle groove 402 .

[0021] Optionally, the first handle 7 and the second handle 10 are arranged opposite to each other at an interval of 180 degrees, and the first handle 7, the second handle 10 and the positioning pin 11 are arranged at an interval of 90 degrees.

[0022] The beneficial effects of the technical solution provided by the embodiments of the present application include at least:

[0023] The cooperation of the flow shielding plate and the flow shielding eaves blocks the upward jet flow at the contact point between the oil pipe in the well and the lower connecting short section, eliminating the hidden danger of the jet flow affecting the vision and breathing function of the operating staff; the convex key enters the right-angle groove, which can drive the device to rotate as a whole and complete the threaded connection between the lower connecting short section and the oil pipe in the well, and there is no need to use the pipe clamp, eliminating the hidden danger of the pipe clamp slipping and falling off; the height limiting positioning column, the flow shielding plate, and the positioning pin cooperate to complete the automatic alignment, so that the sealing components on the oil pipe hanger are not hung or rubbed on the upper mouth of the oil pipe blowout preventer, and can be lowered in the center, which can be completed independently by one person, avoiding the problem of requiring more than two people to cooperate to complete the straightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of 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 creative work.

[0025] Figure 1 A schematic diagram of the internal structure of the oil pipe spraying internal control combination device provided in the embodiment of the present application;

[0026] The reference numerals in the accompanying drawings are described as follows:

[0027] 1 lower connecting nipple, 2 tubing hanger, 3 elastic sealing ring, 4 slotted nipple, 5 height limiting positioning column, 6 flow blocking plate, 7 first handle, 8 pipe clamp, 9 flow control valve, 10 second handle, 11 positioning pin, 12 flow blocking eaves, 13 height fixing pin cylinder, 14 key sleeve, 401 body thread, 402 right-angle groove, 403 thickened tubing thread, 501 height limiting convex circle, 1401 convex key. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0029] The embodiment of the present application provides an internal control combined device for lifting and lowering oil pipes, such as Figure 1As shown, the internal control combination device for lifting and lowering the oil pipe for rapid spraying includes: a lower connecting short section 1, an oil pipe hanger 2, a sealing component 3, a slotted short section 4, a height limiting positioning column 5, a flow blocking plate 6, a first handle 7, a pipe clamp 8, a flow control valve 9, a second handle 10, a positioning pin 11, a flow blocking eaves 12, a height fixing pin cylinder 13 and a locking key sleeve 14.

[0030] Among them, one end of the tubing hanger 2 is connected to the lower connecting short section 1, and the other end is connected to one end of the slotted short section 4, the other end of the slotted short section 4 is connected to one end of the pipe clamp 8, and the other end of the pipe clamp 8 is connected to the flow control valve 9; the outer surface of the tubing hanger 2 is sleeved with a sealing component 3; the outer wall of the slotted short section 4 is sleeved with a flow shielding plate 6, a flow shielding eaves 12 and a lock key sleeve 14, and the outer wall of the slotted short section 4 connected to the tubing hanger 2 includes a thickened body part, and the outer wall of the thickened body part has a right-angle groove 402, and the right-angle groove 402 is compatible with the convex key 1401 on the inner cavity of the lock key sleeve 14; one side of the first end face of the flow-blocking disk 6 is connected to the height-limiting positioning column 5, and the height-limiting convex circle 501 is on the height-limiting positioning column 5; the other side of the first end face of the flow-blocking disk 6 is connected to the height-fixing pin cylinder 13, and there is a flow-blocking eaves 12 between the height-limiting positioning column 5 and the height-fixing pin cylinder 13, and there is a lock key sleeve 14 inside the flow-blocking eaves 12; the second end face of the flow-blocking disk 6 is connected to the first handle 7 and the second handle 10; the positioning pin 11 is inserted into the height-fixing pin cylinder 13 from the second end face of the flow-blocking disk 6.

[0031] The connection between the tubing hanger 2 and the lower short section 1 is not specifically limited. For example, the tubing hanger 2 can be connected to the lower short section 1 through a thread, wherein the threaded connection has the following two optional methods: an end of the tubing hanger 2 connected to the lower short section 1 is provided with an external thread, and an end of the lower short section 1 connected to the tubing hanger 2 is provided with an internal thread; an end of the tubing hanger 2 connected to the lower short section 1 is provided with an internal thread, and an end of the lower short section 1 connected to the tubing hanger 2 is provided with an external thread.

[0032] Similarly, the present application does not specifically limit the internal and external threads of other two components connected by threads. The use of internal or external threads for connecting any components mentioned below is only an optional implementation.

[0033] In an optional embodiment, the lower connecting short section 1 is a hollow pipe body with external threads at both ends of its outer wall, one end is connected to the oil pipe coupling in the well through the external threads, and the other end is connected to the oil pipe hanger 2 through the external threads.

[0034] In order to achieve sealing of the annular space of the tubing casing, in an optional embodiment, the sealing component 3 adopts an O-ring, the manufacturing material of which is oil-resistant rubber material, and the sealing component 3 has a certain elasticity, and is embedded in the groove on the outer wall of the conical body of the tubing hanger 2, and the annular space of the tubing casing is sealed under the bidirectional extrusion of the conical body of the tubing hanger 2 and the four-way conical cavity of the wellhead tubing head.

[0035] In this embodiment, other oil-resistant elastic sealing materials can be used to replace the sealing component 3. For example, packing with oil-resistant elastic properties can be wound multiple times in the groove on the outer wall of the conical body of the tubing hanger 2 to achieve the above-mentioned effect.

[0036] In an optional embodiment, the slotted nipple 4 is a hollow tube body with external threads at both ends of the outer wall, one end of which is a thickened tubing thread 403 connected to the tubing hanger 2, and the other end of which is a body thread 401 connected to the pipe clamp 8. At the same time, the slotted nipple 4 is provided with a thickened body portion at one end of the thickened tubing thread 403 for processing the right-angle groove 402.

[0037] In this embodiment, the unthreaded net length of the slotted nipple 4 is greater than the sum of the heights of the tubing blowout preventer, the tubing elevator, the first handle 7, and the height-limiting positioning column 5, so that the slotted nipple 4 can pass smoothly through the center of the lock key sleeve 14, and then the tubing hanger 2 can pass through the tubing blowout preventer and sit in the four-way conical cavity of the wellhead tubing head.

[0038] In order to facilitate the insertion of the lock key sleeve 14, the inner diameter of the lock key sleeve 14 is larger than the outer diameter of the thickened body of the slotted short section 4. For example, the inner diameter of the lock key sleeve 14 is 1-2 mm larger than the outer diameter of the thickened body of the slotted short section 4.

[0039] The inner cavity of the lock key sleeve 14 is provided with a convex key 1401 protruding inwardly, which is used to correspond to the longitudinal track and the transverse track entering the right-angle groove 402. The protruding height of the convex key 1401 is less than the depth of the right-angle groove 402. In an optional embodiment, the protruding height of the convex key 1401 is 0.5-1 mm less than the depth of the right-angle groove 402, that is, the inner circle surrounded by several convex keys 1401 is larger than the outer diameter of the slotted short section 4 body, which facilitates the withdrawal from the right-angle groove 402.

[0040] The internal control assembly device for lifting and lowering the oil pipe for spraying is placed vertically on the ground when working, so in this embodiment, the horizontal direction refers to parallel to the ground, and the vertical direction refers to vertical to the ground. In this embodiment, the depth of the right-angle groove 402 is less than the thickness of the thickened body part, which prevents the right-angle groove 402 from extending into a body smaller than the slotted short section 4; the thickened body part of the oil pipe adopts the API (American Petroleum Institute) standard outer diameter, but the longitudinal length parallel to the slotted short section 4 is slightly shorter because the longitudinal slideway of the right-angle groove 402 needs to be very short. In an optional embodiment, the total length of the horizontal slot of the right-angle groove 402 from left to right is designed to be 25 mm, and the total length from top to bottom is designed to be 10 mm, and the total length of the longitudinal track from left to right is designed to be 10 mm, and the total length from top to bottom is designed to be 15-20 mm, and the convex key 1401 matched therewith can be designed to have a side length of 8 mm.

[0041] In this embodiment, the transverse track direction of the right-angle groove 402 is the circumferential direction of the thickened body.

[0042] The right-angle grooves 402 need to be evenly distributed around the circumference to stably support the baffle plate 6. The present application does not specifically limit the number of the right-angle grooves 402. For example, three or four right-angle grooves 402 may be provided, but the number of the convex keys 1401 adapted thereto must be the same.

[0043] The present application does not specifically limit the shape of the convex key 1401 . The convex key 1401 may be square or other shapes as long as it matches the right-angle groove 402 .

[0044] The flow blocking device used in the oil pipe spraying internal control combined device comprises: a flow blocking plate 6 and a flow blocking eaves 12. The flow blocking plate 6 is used to close the forward route of the liquid flow from bottom to top, and the flow blocking eaves 12 is a longitudinal ring to control the forward route of the liquid flow.

[0045] In an optional embodiment, the diameter of the flow shielding plate 6 is equal to the diameter of the upper flange of the oil pipe blowout preventer used, so as to facilitate the arrangement of the height-fixing pin barrel 13 and the height-limiting positioning column 5 with spacing requirements.

[0046] In an optional embodiment, the inner diameter of the flow shielding eaves 12 is larger than the diameter of the through hole of the tubing blowout preventer used, so that the liquid flow sprayed out of the gap between the through hole of the tubing blowout preventer and the tubing hanger 2 can be controlled to avoid personal injury caused by strong lateral spraying.

[0047] Furthermore, in order to increase the flow shielding area of ​​the flow shielding eaves 12 , the diameter of the flow shielding eaves 12 is made equal to the distance between the height limiting positioning column 5 and the height determining pin cylinder 13 .

[0048] In an optional embodiment, the height-fixing pin barrel 13 is a hollow cylinder, and its function is to control the distance between the flow-blocking disc 6 and the flange plane of the used tubing BOP, just like the height-limiting positioning column 5, and to control the position of the positioning pin 11 at the same time. According to the rule that the circumference of the screw holes on the flange of the tubing BOP is uniformly distributed for all holes, the center distance between the height-fixing pin barrel 13 and the height-limiting positioning column 5 is set equal to the distance between the diagonal screw holes at 180 degrees of the flange of the used tubing BOP, so as to improve the use efficiency.

[0049] In the oil pipe lifting and lowering internal control device, the positioning pin 11 is inserted from top to bottom into the central through hole of the height-fixing pin barrel 13, so that when the height-limiting positioning column 5 enters a screw hole on the upper flange of the oil pipe blowout preventer, it can enter the screw hole at 180 degrees opposite to it. There is a matching gap between the outer diameter of the positioning pin 11 and the inner diameter of the central through hole of the height-fixing pin barrel 13, so that it can enter and exit smoothly, and the deviation of the axis centerline is as small as possible within a limited range, which is conducive to improving the centering accuracy of the flow-blocking plate 6.

[0050] In practical applications, when the sealing component 3 on the tubing hanger 2 enters the upper flange of the tubing blowout preventer, it is necessary to rotate the flow blocking disc 6 to drive the height limiting positioning column 5 and the height setting pin barrel 13 to rotate, and the height limiting convex circle 501 on the height limiting positioning column 5 and the height setting pin barrel 13 are respectively in contact with the diagonal screw holes at 180 degrees of the upper flange of the tubing blowout preventer to straighten the tubing hanger 2. When the sealing component 3 enters the upper flange of the tubing blowout preventer, if the convex key 1401 on the lock key sleeve 14 enters the right-angle groove 402, the bottom plane height of the lock key sleeve 14 will be lower than the top height of the longitudinal track of the right-angle groove 402, because the lock key sleeve 14, the flow blocking disc 6, the height limiting positioning column 5 and the height setting pin barrel 13 are an integrated structure, and when the convex key 1401 is limited by the right-angle groove 402 and cannot rotate, the flow blocking disc 6 will not be able to rotate, and then the height limiting positioning column 5 and the height setting pin barrel 13 cannot rotate.

[0051] In order to solve the problem that the tubing hanger 2 cannot be straightened because the height-limiting positioning column 5 and the height-limiting pin barrel 13 cannot be rotated to align with the screw hole on the tubing blowout preventer, it is necessary to ensure that when the sealing component 3 enters the upper flange of the tubing blowout preventer, the bottom plane of the lock key sleeve 14 is above the top of the longitudinal track of the right-angle groove 402. Therefore, in an optional embodiment, the distance from the bottom plane of the height-limiting convex circle 501 of the height-limiting positioning column 5 to the bottom plane of the lock key sleeve 14 is greater than the distance from the lower plane of the elastic sealing ring 3 to the top of the longitudinal track of the right-angle groove 402.

[0052] Furthermore, the distance between the bottom plane of the height limiting convex circle 501 of the height limiting positioning column 5 and the bottom plane of the lock key sleeve 14 is larger than the distance between the sealing component 3 and the top of the longitudinal track of the right-angle groove 402 by 5-10 mm.

[0053] Furthermore, while ensuring that the height limiting positioning column 5 and the height limiting pin barrel 13 can be rotated to align with the screw hole of the oil pipe blowout preventer, the height from the top of the height limiting positioning column 5 to the bottom of the height limiting convex circle 501 is made as low as possible, which can save materials and facilitate processing.

[0054] In an optional embodiment, the gap between the outer diameter of the positioning pin 11 and the inner diameter of the central through hole of the height-fixing pin cylinder 13 is 0.5-1 mm, so that the positioning pin 11 can enter and exit smoothly.

[0055] In order to assist the rotation of the flow shielding plate 6, in an optional embodiment, the outer edge of the flow shielding plate 6 is respectively fixedly connected to the first handle 7 and the second handle 10. At the same time, for easy operation, the first handle 7 and the second handle 10 are configured as longitudinal columns, which are set up opposite to each other at an interval of 180 degrees and are 90 degrees apart from the positioning pin 11.

[0056] To ensure the necessary strength requirement, in an optional implementation, the material of the slotted short section 4 and the key sleeve 14 should be above 20 steel.

[0057] A flow control valve 9 is provided in the internal control assembly device for lifting and lowering the oil pipe and spraying, and its function is to control the flow direction of the fluid after the pipe clamp 8, the slotted short section 4, the oil pipe hanger 2, and the lower short section 1 are connected in sequence into an internal cavity.

[0058] In order to facilitate further understanding of the present application, the working principle of the internal control combined device for lifting and lowering the oil pipe for spraying is briefly described:

[0059] (1) When the device is in a normal standby state, the convex key 1401 enters the lateral slot of the right-angle groove 402.

[0060] (2) Threaded connection. After entering the emergency spraying procedure, the internal control combination device for controlling the oil pipe spraying is moved close to the oil pipe in the well. The bottom lower short section 1 enters the oil pipe coupling in the well. The operator grasps the first handle 7 or the second handle 10 and rotates clockwise. The torque is transmitted to the lower short section 1 through the flow shielding plate 6, the lock key sleeve 14, the slotted short section 4, the oil pipe hanger 2, and then rotates to realize the threaded connection between the lower short section 1 and the oil pipe in the well. If liquid gushes out of the oil pipe, the flow shielding plate 6 and the flow shielding eaves 12 cooperate to prevent the upward spray from the internal and external thread joint when the oil pipe coupling in the well contacts and connects with the lower short section 1, eliminating the hidden danger of the jet flow affecting the vision and respiratory function of the operator.

[0061] (3) Preparation before straightening. The pipe string including the tubing blowout prevention internal control assembly device is lifted up for a short distance, and the wellhead tubing elevator is removed. While lowering, the flow blocking plate 6 is rotated counterclockwise to make the convex key 1401 exit the transverse track of the right-angle groove 402 and enter the longitudinal track. The sealing component 3 is close to the through hole of the tubing blowout preventer upper flange, and the bottom of the height limiting positioning column 5 contacts the upper plane of the tubing blowout preventer upper flange. The flow blocking plate 6 is rotated to make the height limiting positioning column 5 enter any screw hole of the tubing blowout preventer upper flange nearby, and the bottom plane of the height limiting convex circle 501 contacts the surrounding plane of any screw hole of the tubing blowout preventer upper flange.

[0062] (3) Straightening. Grasp the first handle 7 or the second handle 10 and rotate the flow-blocking plate 6 in the direction of the axis of the tubing blowout preventer, so that the height-setting pin barrel 13 is on the plane of the upper flange of the tubing blowout preventer, put the positioning pin 11 into the height-setting pin barrel 13, and rotate the flow-blocking plate 6 in the direction of the axis of the tubing blowout preventer. When the height-setting pin barrel 13 rotates to the diagonal hole 180 degrees away from the screw hole of the height-limiting positioning column 5, the positioning pin 11 falls into the diagonal hole under the action of its own weight, completing the automatic alignment. Continue to tighten and maintain the state. At this time, the flow-blocking plate 6 is basically centered, and the tubing string is also basically centered. One person completes the straightening of the tubing string including the tubing hanger 2. Continue to tighten and keep the tubing string in the center state. Within an allowable deviation, the sealing component 3 on the tubing hanger 2 can enter the flange through hole of the tubing blowout preventer without hanging or rubbing. Since the outer diameter of the slotted nipple 4 body is smaller than the inner diameter formed by several convex keys 1401, the unthreaded net length of the slotted nipple 4 is greater than the sum of the heights of the tubing blowout preventer, the tubing elevator, the first handle 7, and the height-limiting positioning column 5, the slotted nipple 4 will pass smoothly through the center of the lock key sleeve 14, and then the tubing hanger 2 will sit in the four-way tapered cavity of the wellhead tubing head.

[0063] The technical solution provided in the embodiments of the present application has at least the following technical effects:

[0064] When the lower short section enters the oil pipe coupling in the well, the flow shielding plate and the flow shielding eave cooperate to block the upward jet flow from the joint of the internal and external threads when the oil pipe in the well contacts and connects with the lower short section, eliminating the hidden danger of the jet flow affecting the vision and breathing function of the operating staff; the convex key enters the longitudinal track of the right-angle groove, and the flow shielding plate is rotated clockwise to make the convex key enter the transverse groove of the right-angle groove, thereby driving the device to rotate as a whole and completing the threaded connection between the lower short section and the oil pipe in the well, without the need to use a pipe clamp, eliminating the hidden danger of the pipe clamp slipping and falling off;

[0065] The height-limiting positioning column enters a screw hole in the flange of the tubing blowout preventer, and the flow-blocking disk rotates a limited angle, so that the locating pin can fall into the diagonal hole under the action of its own weight, completing the automatic alignment. Keeping it tight can ensure stable centering, so that the elastic sealing ring on the tubing hanger is free from hanging and rubbing on the upper mouth of the tubing blowout preventer and is lowered to the center, avoiding the problem that more than two people must cooperate to complete the straightening. What is particularly important is that it solves the problem that the centering position of the tubing was judged entirely by manual visual observation in the past, which seriously affected the speed or even made it impossible to implement when the overflow was large; when the tubing spray-rushing internal control combination device needs to be lowered together with the tubing, the flow-blocking disk rotates counterclockwise by a very small degree to make the convex key withdraw from the horizontal slot of the right-angle groove, and then withdraw from the longitudinal track as it is lowered, which is convenient and quick.

[0066] The internal control combined device for lifting and lowering the oil pipe for rapid spraying not only has the advantages of safety protection, threaded connection, and straightening without the need for other auxiliary tools, but also can be completed independently by an operator at the wellhead. It is simple to make, ingeniously combined, and safe to use.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A combined internal control device for oil pipe spraying, characterized in that: The oil pipe lifting and lowering quick spraying internal control assembly device comprises: a lower connecting short section (1), an oil pipe hanger (2), a sealing component (3), a slotted short section (4), a height limiting positioning column (5), a flow blocking plate (6), a first handle (7), a pipe clamp (8), a flow control valve (9), a second handle (10), a positioning pin (11), a flow blocking eave (12), a height-fixing pin cylinder (13) and a locking key sleeve (14); One end of the tubing hanger (2) is connected to the lower connecting short section (1), and the other end is connected to one end of the slotted short section (4), the other end of the slotted short section (4) is connected to one end of the pipe clamp (8), and the other end of the pipe clamp (8) is connected to the flow control valve (9); The sealing component (3) is sleeved on the outer surface of the tubing hanger (2); the flow shielding plate (6), the flow shielding eaves (12) and the lock key sleeve (14) are sleeved on the outer wall of the slotted short section (4); the outer wall of the slotted short section (4) connected to the tubing hanger (2) includes a thickened body portion; the outer wall of the thickened body portion has a right-angle groove (402); the right-angle groove (402) is matched with the convex key (1401) on the inner cavity of the lock key sleeve (14); the right-angle groove (402) is divided into a longitudinal track and a transverse track; One side of the first end surface of the flow shielding plate (6) is connected to the height limiting positioning column (5), and the height limiting positioning column (5) has a height limiting convex circle (501). The other side of the first end surface of the flow shielding plate (6) is connected to the height limiting pin cylinder (13). The height limiting pin cylinder (13) is a hollow cylinder. The center distance between the height limiting pin cylinder (13) and the height limiting positioning column (5) is equal to the diagonal screw hole distance at 180 degrees on the flange of the oil pipe blowout preventer. The flow shielding eaves (12) are provided between the height limiting positioning column (5) and the height limiting pin cylinder (13). The lock key sleeve (14) is provided inside the flow shielding eaves (12). The bottom plane of the height limiting convex circle (501) to the lock key sleeve (14) 14) The spacing of the bottom plane is greater than the spacing from the lower plane of the sealing component (3) to the top of the longitudinal track of the right-angle groove (402) by 5-10 mm; the second end surface of the flow shielding plate (6) is connected to the first handle (7) and the second handle (10), the first handle (7) and the second handle (10) are configured as longitudinal columns, the first handle (7) and the second handle (10) are arranged opposite to each other at an interval of 180 degrees, and the first handle (7), the second handle (10) and the positioning pin (11) are spaced 90 degrees apart; the positioning pin (11) is inserted into the height-fixing pin cylinder (13) from the second end surface of the flow shielding plate (6).

2. The internal control combined device for oil pipe lifting and spraying according to claim 1 is characterized in that: The slotted short section (4) is connected to the tubing hanger (2) via a thickened tubing thread (403), and the slotted short section (4) is connected to the pipe clamp (8) via a body thread (401).

3. The internal control combined device for oil pipe lifting and spraying according to claim 1 is characterized in that: The sealing component (3) is an elastic O-type sealing ring, which is embedded in a groove on the outer wall of the conical body of the oil pipe hanger (2).

4. The internal control combined device for oil pipe lifting and spraying according to claim 1 is characterized in that: The slotted short section (4) is a hollow tube, and the depth of the right-angle groove (402) is less than the thickness of the thickened body portion.

5. The internal control combined device for oil pipe spraying when lifting and lowering oil pipes according to claim 1 is characterized in that: The diameter of the baffle plate (6) is compatible with the diameter of the upper flange of the oil pipe blowout preventer.

6. The internal control combined device for oil pipe lifting and spraying according to claim 1 is characterized in that: The flow shielding eaves (12) are longitudinally annular, and the inner cavity diameter of the flow shielding eaves (12) is larger than the through hole diameter of the oil pipe blowout preventer.

7. The internal control combined device for oil pipe lifting and spraying according to claim 1 is characterized in that: The inner diameter of the locking key sleeve (14) is larger than the outer diameter of the thickened body portion of the outer wall of the slotted short section (4), and the height of the protruding key (1401) toward the axis of the locking key sleeve (14) is smaller than the depth of the right-angle groove (402).

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