Screen pipe and blowout prevention single connecting tool and using method thereof

Abstract

The invention discloses a connecting tool for a screen pipe and a blowout prevention single pipe and a using method of the connecting tool. A threaded fastener and an expansion sleeve are arranged on an inverted cone mandrel in a sleeving manner; the end, away from the threaded fastener, of the inverted-cone mandrel is provided with a cone shaft, and the other end is connected with a connector. The semi-ring thrust sleeve is provided with an annular cavity, and the end, close to the expansion sleeve, of the threaded fastener and the end, close to the threaded fastener, of the expansion sleeve are both arranged in the annular cavity. A groove body is formed in the outer side face of the semi-ring thrust sleeve, a limiting screw plug capable of sliding is arranged on the groove body, and a clamping device matched with the screen pipe is connected to the limiting screw plug. According to the invention, the connection operation procedure of the screen pipe and the blowout prevention single pipe is improved: the traditional way of using a conversion joint to buckle and buckle up for connection is changed into the way of directly inserting the blowout prevention single pipe into the screen pipe, so that the operation difficulty and the operation procedure are simplified, the high-reliability connection operation under the emergency conditions of overflow, well kick and the like is realized, and the connection success rate is improved; and meanwhile, the clamping device is matched with the expansion sleeve, so that the connection reliability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum exploration and development engineering, and particularly relates to a screen pipe and blowout preventer single-root connecting tool and a use method thereof. Background Art

[0002] Screen completion is a common completion method for oil and gas wells. This involves running slotted screens through the oil and gas reservoir to avoid wellbore collapse and sand control issues in openhole completions. If overflow occurs during screen running, the blowout preventer (BOP) cannot be directly closed due to the artificial slots in the screen itself, which are not airtight. Instead, a blowout preventer (BOP) must be connected and lowered into the BOP before the rams (BOP) can be closed and the wellhead shut down. Traditional screen couplings are made of thin casing buckles, which require matching thin casing buckles for connection to the BOP. This requires extremely high alignment; even the slightest deviation can lead to misalignment and misalignment, resulting in failure. Furthermore, the buckle assembly process is lengthy. When overflow or wellbore influx occurs at the wellhead, operators face difficulties in line of sight, stress, and limited access, making the assembly extremely challenging. This often results in unsuccessful BOP assembly, preventing the well from being shut down, and potentially leading to an uncontrolled blowout.

[0003] The patent publication number is CN208966295U, and the name is a patent application for a screen pipe connecting device, which includes: a joint, a rotating sleeve, and a connecting sleeve. The joint has a first connecting portion and a second connecting portion connected thereto, and the outer peripheral surface of the first connecting portion has a first end, a second end, and an intermediate end located in the middle of the first end and the second end, and the intermediate end protrudes outward from the straight line formed by the first end and the second end. The rotating sleeve has a clamping portion to clamp with the first connecting portion of the joint, and the joint can rotate in the rotating sleeve. The connecting sleeve is detachably connected to the rotating sleeve and abuts against the joint. This device cannot be used to connect a single blowout preventer to a screen pipe, and the fixing method is single. Summary of the Invention

[0004] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a screen pipe and blowout preventer connection tool and its use method, which realizes the connection between the screen pipe and the blowout preventer through two fixing methods: clamping and expansion sleeve.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A screen pipe and blowout preventer single connection tool, comprising: an inverted conical core shaft and a semi-ring thrust sleeve, wherein the inverted conical core shaft is sleeved with a threaded fastener and an expansion and contraction sleeve; the inverted conical core shaft is provided with a tapered shaft at one end away from the threaded fastener, and the other end is connected to a joint; the semi-ring thrust sleeve has an annular cavity, and the end of the threaded fastener close to the expansion and contraction sleeve and the end of the expansion and contraction sleeve close to the threaded fastener are both arranged in the annular cavity; the outer side surface of the semi-ring thrust sleeve has a groove body, the groove body is provided with a slidable limit screw plug, and the limit screw plug is connected to a clamping device matching the screen pipe.

[0007] Optionally, the clamping device includes a telescopic protective sleeve, one end of which is connected to the limit screw plug, and the other end extends out of the groove body of the semi-ring thrust sleeve, and a radially retractable protective lock tongue is provided on the extended end of the telescopic protective sleeve.

[0008] Optionally, a pin is provided at one end of the protective lock tongue away from the limiting screw plug.

[0009] Optionally, the number of the protective lock tongues is greater than one and they are arranged circumferentially along the telescopic protective sleeve.

[0010] Optionally, a spring retaining ring is provided on the groove body of the semi-ring thrust sleeve, one end of the spring retaining ring is connected to the groove body, and the other end is connected to the limit screw plug.

[0011] Optionally, the end of the threaded fastener close to the expansion and contraction sleeve and the end of the expansion and contraction sleeve close to the threaded fastener both have an annular step that matches the annular cavity of the semi-ring thrust sleeve.

[0012] Optionally, a slip plate is provided on the outer side of the expansion and contraction sleeve close to one end of the tapered shaft.

[0013] Optionally, the threaded fastener is a thrust nut.

[0014] Optionally, one end of the tapered shaft away from the expansion and contraction sleeve is connected to a guide head.

[0015] The method for using the screen pipe and blowout preventer single connecting tool comprises the following steps:

[0016] Connect the joint to the blowout preventer, lift the blowout preventer, and insert the device into the screen pipe;

[0017] Rotate the threaded fastener to push the expansion sleeve, and fix it to the inner wall of the screen tube through the expansion sleeve;

[0018] The upper anti-blowout single root drives the device and the screen pipe, and pushes the limiting screw plug to move along the groove body of the semi-ring thrust sleeve, so that the clamping device is clamped with the lower end surface of the coupling of the screen pipe.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention improves the connection operation procedure between the screen pipe and the blowout preventer: the traditional connection using a conversion joint with a buckle and a buckle is replaced by the present invention directly inserting it into the screen pipe, which simplifies the operation difficulty and operation procedure, realizes high-reliability connection operation in emergency situations such as overflow and well kick, and improves the connection success rate.

[0021] This invention improves the connection between the screen pipe and the blowout preventer: the traditional method, which relies on a thin buckle with a casing buckle, is replaced by a method where a tool is quickly inserted into the screen pipe and then manually activated to expand the built-in slip teeth downwardly toward the conical surface. This allows the teeth of the slip teeth to fit tightly against the inner wall of the screen pipe, generating sufficient axial friction to achieve a tight connection between the screen pipe and the blowout preventer. This achieves a more reliable connection, better adaptability to emergency operating environments, and faster operation.

[0022] The present invention adds a clamping device for connecting the screen pipe and the blowout preventer: after the tool is quickly inserted into the screen pipe and the toothed part of the built-in slip tooth plate is manually stimulated to tightly fit with the inner wall of the screen pipe to tightly connect the screen pipe, the screen pipe is lifted up to lift the lower end of the step surface of the screen pipe female coupling away from the casing elevator surface, and the inside and outside fitters cooperate to quickly pull down the telescopic protective sleeve and forcefully push it downward to below the lower step surface of the screen pipe female coupling until all the safety tongue blocks are under the lower step surface of the screen pipe female coupling, firmly clamping the screen pipe female coupling to complete the safety protection and make the connection more reliable and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0024] Figure 1 It is a cross-sectional view of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection state of the present invention;

[0026] Figure 3 This is a schematic diagram of the present invention in a lowering state;

[0027] Among them, 1. Joint; 2. Threaded fastener; 3. Spring retaining ring; 4. Half-ring thrust sleeve; 5. Limit screw plug; 6. Telescopic protective sleeve; 7. Protective lock tongue; 8. Pin shaft; 9. Expansion and contraction sleeve; 10. Slip tooth plate; 11. Conical shaft; 12. Sealing assembly; 13. Guide head; 14. Screen pipe; 15. Blowout preventer; 16. Slip; 17. Turntable; 101. Inverted cone core shaft. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0029] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] The present invention will be described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown, a screen pipe and blowout prevention single connection tool of the present invention comprises: a joint 1, a threaded fastener 2 and a semi-ring thrust sleeve 4

[0033] One end of the connector 1 is connected to an inverted tapered mandrel 101, and the other end is connected to a blowout preventer 15. The threaded fastener 2 is sleeved onto the end of the inverted tapered mandrel 101 near the connector 1. The threaded fastener 2 has a groove in the middle and a collar at the end. Specifically, the threaded fastener 2 is a thrust nut.

[0034] The semi-ring thrust sleeve 4 has an annular cavity, the middle part of the inner wall of the annular cavity of the semi-ring thrust sleeve 4 has a thread, and both ends of the inner wall of the annular cavity of the semi-ring thrust sleeve 4 have annular platforms, and the annular platforms of the threaded fastener 2 extend into the annular cavity of the semi-ring thrust sleeve 4 and are engaged with the inner wall steps of the annular cavity.

[0035] The outer side surface of the semi-ring thrust sleeve 4 has a groove body, and a spring retaining ring 3 is provided at the end of the groove body. A limiting screw plug 5 is provided at the other end of the spring retaining ring 3. The limiting screw plug 5 has a step. One end of the step of the limiting screw plug 5 is connected to the spring retaining ring, and the other end is connected to a telescopic protective cover 6.

[0036] The other end of the telescopic protective sleeve 6 is provided with a protective lock tongue 7. The number of the protective lock tongues 7 is greater than one and they are arranged circumferentially along the telescopic protective sleeve 6. The protective lock tongue 7 radially passes through the telescopic protective sleeve 6 and can be extended and retracted in the radial direction of the telescopic protective sleeve 6. The protective lock tongue 7 radially penetrates the interior of the telescopic protective sleeve 6 and has an inclined surface facing the expansion and contraction sleeve 9. The other end of the protective lock tongue 7 is provided with a pin 8 for fixing the protective lock tongue 7.

[0037] The other end of the inverted tapered core shaft 101, away from the threaded fastener 2, passes through the semi-annular thrust sleeve 4 and is externally sleeved with an expansion and contraction sleeve 9. One end of the expansion and contraction sleeve 9 extends into the annular cavity of the semi-annular thrust sleeve 4 and engages with the inner wall step of the annular cavity, while the other end is sleeved with a slip plate 10. A tapered shaft 11 is inserted into the interior of the slip plate 10 at the end away from the expansion and contraction sleeve 9.

[0038] The other end of the tapered shaft 11 is sleeved with a sealing assembly on the outside, and the end is connected to a guide head 13.

[0039] When using the device, first, the screen pipe 14 is placed on the turntable 17 through the slips 16. After the device is connected to the blowout preventer 15, the blowout preventer 15 is lifted, and the guide head 13 of the device is inserted into the interior of the screen pipe 14. After the guide head 13 is lowered into place, the threaded fastener 2 is rotated to push the expansion sleeve 9, which slides along the inverted cone core shaft 101 and expands radially outward. The slip teeth 10 are connected and fixed to the inner wall of the screen pipe 14 through axial friction.

[0040] Then, the anti-blowout single root 15 is lifted up to drive the device and the screen pipe 14 to leave the turntable 17 by thirty to forty centimeters, and the limit screw plug 5 is pushed to move along the groove of the semi-ring thrust sleeve 4, so that the telescopic protective sleeve 6 pushes the protective lock tongue 7 to move in the direction of the guide head 13 until the upper end face of the protective lock tongue 7 passes over the lower end face of the coupling of the screen pipe 14, and the protective lock tongue 7 is radially extended toward the center of the screen pipe 14, so that the upper end face of the protective lock tongue 7 is snapped into the lower end face of the coupling of the screen pipe 14, thereby realizing the second connection and fixation between the device and the screen pipe 14.

[0041] Then, the slips 16 are removed and the blowout preventer 15 is used to drive the device and the screen pipe 14 through the rotary table 17, and the blowout preventer is used to align with the body of the blowout preventer 15 to shut in the well.

[0042] Example

[0043] The following combination Figure 2 and Figure 3 The specific embodiments of the present invention are further described.

[0044] In the preparation stage before going up the well, the following steps are first carried out in the workshop:

[0045] Check the device of the present invention to ensure that there are no loose buckles.

[0046] Check whether the kava tooth plate 10 is firmly fixed and whether the threaded fastener 2 is missing. Check whether the tooth profile of the kava tooth plate 10 is obviously damaged and observe whether all tooth profile specifications are consistent.

[0047] Use a grease gun to inject lubricating oil into the device of the present invention, then rotate the threaded fastener 2 to confirm whether the rotational force can meet the needs of a single-person screwing operation, observe whether the thread surface is clean and free of debris, repeatedly rotate in and out several times to ensure that the expansion and contraction sleeve 9 is moving normally, and record the minimum and maximum expansion and contraction outer diameters of the expansion and contraction sleeve 9.

[0048] Check whether the axial movement of the clamping device is smooth, whether the protective lock tongue 7 is intact, and whether the spring retaining ring 3 is intact.

[0049] After the inspection is completed, the spinner connection tool is used in the workshop to connect it to the blowout preventer single root 15, and the upper end of the blowout preventer single root 15 is connected to the lifting wire to complete the preparation before going up the well.

[0050] During the stage of positioning and inspection of the equipment, the site worker cooperates with the crane to lift the connected device of the present invention and the blowout preventer 15 onto the drilling catwalk platform, and then the technician checks whether the tool appearance, threads, and movable parts are normal.

[0051] After checking that everything was normal, the assistant driller lowered the drilling platform pneumatic winch hook to the catwalk platform, and the site worker connected the winch hook to the blowout preventer single 15 lifting wire. Then the site worker cooperated with the assistant driller to operate the pneumatic winch lifting tool to the drilling platform ramp.

[0052] During the process of lowering the screen pipe 14, if the driller finds overflow or hears the overflow alarm signal, he will immediately stop the operation of lowering the screen pipe 14, send a shut-in signal, and quickly lower the screen pipe 14 to the wellhead. The inside and outside fitters will cooperate to seat the casing elevator to the wellhead.

[0053] The inside and outside fitters cooperated to replace the drill pipe elevator prepared on the drilling platform.

[0054] The driller operates, and the inside and outside fitters cooperate to lift the blowout preventer single rod 15 on the ramp. After the driller lifts the tool, the inside and outside fitters align the tool guide head with the center and align it with the screen pipe 14. The driller controls the lowering speed and slowly inserts the guide head 13. After the guide head 13 is inserted into the screen pipe 14, the inside and outside fitters cooperate to use a hook wrench to quickly rotate the threaded fastener 2 in the forward direction. When it cannot be rotated manually, the force lever is used to tighten the torque.

[0055] After the torque is tightened, the driller slowly lifts the pipe string 100 mm and observes whether the casing is detached from the elevator to verify that the device of the present invention is firmly connected to the screen pipe 14;

[0056] After confirming that the device has been connected to the screen pipe 14 in series, the inside and outside fitters cooperate to quickly pull down the telescopic protective cover 6 and push it down forcefully to below the lower step surface of the female coupling of the screen pipe 14 until all the safety tongue blocks are below the lower step surface of the female coupling of the screen pipe 14, firmly clamping the female coupling of the screen pipe 14 to complete the safety protection.

[0057] The internal and external fitters cooperated to quickly close the cock and remove the wellhead casing elevator; the driller lowered the blowout preventer 15-meter seat clamp to the drilling floor, closed the blowout preventer through the driller's console, and completed the well shut-in operation.

[0058] During the tool disassembly stage, the blowout preventer gate is opened, and the driller lifts the blowout preventer single rod 15 to make the screen pipe 14 higher than the drill floor. The inside and outside fitters use the casing slips 16 to seat the casing at the wellhead and install the safety slips. The driller controls the slow lowering and observes the hanging weight to ensure that the screen pipe 14 is stuck at the wellhead without the risk of sliding. The tool engineer installs the protective locking tongue 7, and the inside and outside fitters use a hammer to knock the telescopic protective sleeve 6 axially up and down to release the suspension stress. Then they pull out the protective locking tongue 7 in turn and push up the telescopic protective sleeve 6 to separate the telescopic protective sleeve 6 from the screen pipe 14 coupling.

[0059] The inside and outside fitters cooperate to use a hook wrench to reversely rotate the threaded fastener 2 to the limit. After the slip die 10 is loosened, the driller slowly lifts the tool and separates it from the screen pipe 14; the driller cooperates with the inside and outside fitters on the drilling floor to place the tool and the blowout preventer single root 15 on the drilling floor ramp, and then removes the upper lifting card of the blowout preventer single root 15; the inside and outside fitters hang the pneumatic winch hook on the lifting wire of the blowout preventer single root 15, and the assistant driller operates the pneumatic winch and cooperates with the site workers to lift the tool from the ramp to the catwalk; the driller and the inside and outside fitters cooperate to use the lifting card and connect the wellhead casing. After the lifting card is securely installed, the driller lifts the screen pipe 14, and the inside and outside fitters cooperate to remove the wellhead casing slips 16 and safety slips to resume normal operation of lowering the screen pipe 14.

[0060] Comparative tests have shown that using this tool to connect the screen pipe 14 to the blowout preventer 15 can save more than 10 seconds compared to the traditional method of connecting with casing buckles and fine buckles. It is also simple to operate, has a high success rate, and can avoid operational errors. It is an effective tool for fast and reliable connection in emergency situations such as overflow and well kick.

[0061] Unless otherwise specified, the device components involved in the above embodiments are all conventional device components, and the structural settings, working modes or control modes involved are all conventional settings, working modes or control modes in the art unless otherwise specified.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A screen pipe and blowout preventer single connection tool, characterized in that: include: An inverted cone core shaft (101) and a semi-ring thrust sleeve (4), wherein the inverted cone core shaft (101) is sleeved with a threaded fastener (2) and an expansion and contraction sleeve (9); a cone shaft (11) is provided at one end of the inverted cone core shaft (101) away from the threaded fastener (2), and the other end is connected to a joint (1); the semi-ring thrust sleeve (4) has an annular cavity, and the end of the threaded fastener (2) close to the expansion and contraction sleeve (9) and the end of the expansion and contraction sleeve (9) close to the threaded fastener are both arranged in the annular cavity; the outer side surface of the semi-ring thrust sleeve (4) has a groove body, and a slidable limit screw plug (5) is provided on the groove body, and a clamping device matching the screen tube (14) is connected to the limit screw plug (5).

2. A screen pipe and blowout preventer single connecting tool according to claim 1, characterized in that: The clamping device comprises a telescopic protective sleeve (6), one end of which is connected to the limit screw plug (5), and the other end of which extends out of the groove body of the semi-ring thrust sleeve (4), and a radially retractable protective lock tongue (7) is provided on the extended end of the telescopic protective sleeve (6).

3. A screen pipe and blowout preventer single connecting tool according to claim 2, characterized in that: A pin shaft (8) is provided at one end of the protective locking tongue (7) away from the limiting screw plug (5).

4. A screen pipe and blowout preventer single connecting tool according to claim 2, characterized in that: The number of the protective lock tongues (7) is greater than one and they are arranged in a circumferential direction along the telescopic protective sleeve (6).

5. A screen pipe and blowout preventer single connecting tool according to claim 1, characterized in that: A spring retaining ring (3) is provided on the groove body of the semi-ring thrust sleeve (4), one end of the spring retaining ring (3) is connected to the groove body, and the other end is connected to the limiting screw plug (5).

6. A screen pipe and blowout preventer single connecting tool according to claim 1, characterized in that: The end of the threaded fastener (2) close to the expansion sleeve (9) and the end of the expansion sleeve (9) close to the threaded fastener both have an annular step that matches the annular cavity of the semi-ring thrust sleeve (4).

7. A screen pipe and blowout preventer single connecting tool according to claim 1, characterized in that: A slip plate (10) is provided on the outer side of the expansion and contraction sleeve (9) close to one end of the tapered shaft (11).

8. A screen pipe and blowout preventer single connecting tool according to claim 1, characterized in that: The threaded fastener (2) is a thrust nut.

9. A screen pipe and blowout preventer single connecting tool according to claim 1, characterized in that: One end of the tapered shaft (11) away from the expansion and contraction sleeve (9) is connected to a guide head (13).

10. A method for using a screen pipe and a single blowout preventer connection tool according to any one of claims 1 to 9, characterized in that: The following steps are involved: Connect the joint (1) to the blowout preventer (15), lift the blowout preventer (15), and insert the device into the screen tube (14); The threaded fastener (2) is rotated to push the expansion sleeve (9), and the expansion sleeve (9) is fixed to the inner wall of the screen tube (14); The upper anti-blowout single root (15) drives the device and the screen tube (14), pushing the limiting screw plug (5) to move along the groove body of the semi-ring thrust sleeve (4), so that the clamping device is clamped with the lower end surface of the coupling of the screen tube (14).

Images