Telescoping printing lead device for horizontal wells

Abstract

The present application relates to a kind of telescopic printing lead device for horizontal well, relate to oil well workover technology equipment field, for solving the problem of construction difficulty caused by printing lead device matched with logging technology use, higher cost, longer construction time.Problems include: connecting barrel assembly, one end is connected with upper delivery string, the other end of connecting barrel assembly is provided with sliding cavity;Printing lead module, along the first direction telescopic setting in sliding cavity;Extrusion piece, movably arranged in sliding cavity, and located between printing lead module and the bottom of sliding cavity;Limiting structure, between connecting barrel assembly and printing lead module, for preventing printing lead module from sliding out of sliding cavity.The device in the present application is pulled out to ground, and the specific production orientation of the first lead print in the wellbore can be found by using the second lead print as reference point.In this way, the type and size of the falling object, the degree of wellbore deformation and the orientation of the wellbore can be accurately judged when lowering into horizontal section.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil well workover equipment, in particular to a telescopic printing lead mold device for horizontal wells. BACKGROUND

[0002] During the production process of oil and water wells in oilfields, some tools may fall into the wells, or wellbore deformation may occur. After these situations occur, due to the lack of management level and technical ability of the construction team at that time, and the fear of liability concerns, the real situation at that time is not described. When the oil and water wells need to be repaired again after a period of production or a period of shutdown, it is impossible for the previous construction team to perform the operation again, and the situation of not understanding the downhole conditions may occur. In this case, in order to find out the situation in the well, the shape of the upper end surface of the falling object and the wellbore deformation are needed to be observed by lowering the lead printing, so as to judge the type, size of the falling object and the degree of wellbore deformation. This method is called lead printing in oil well workover. The lead printing is to cast a lead mold (the material of the lead mold is metal lead) at the front end of the steel frame, so that it first contacts the falling object or the deformed part in the casing when it is lowered into the well. Since the hardness of the metal lead is low, the metal lead will leave marks on the lead mold after contacting the falling object or the deformed part in the casing. By analyzing the marks on the lead mold when it is pulled out to the ground, the downhole conditions can be determined.

[0003] However, since the lead printing part is located more than 1,000 meters below the ground, although the marks on the lead mold after the lead printing can determine some conditions in the well, the direction of the falling object or the direction of the wellbore deformation cannot be determined. If the direction of the falling object or the direction of the wellbore deformation cannot be determined, it is not easy to develop the next technical measures, which affects the oil and water well workover operation. In order to solve the above problems, the direction of the falling object or the direction of the wellbore deformation can be obtained by matching the logging technology while printing the lead mold. However, the matching logging technology during the lead printing has great construction difficulty, high cost and long construction time.

[0004] That is, the printing lead mold device in the prior art needs to be matched with the logging technology during the lead printing, which may cause great construction difficulty, high cost and long construction time. SUMMARY

[0005] The present application provides a telescopic printing lead mold device for horizontal wells, which is used to solve the problems of great construction difficulty, high cost and long construction time caused by the use of the printing lead mold device matching the logging technology.

[0006] The application provides a telescopic printing lead device for a horizontal well, which comprises a connecting cylinder assembly, one end of which is connected with an upper running string, and the other end of the connecting cylinder assembly is provided with a sliding cavity; a printing lead assembly, which is arranged in the sliding cavity in a telescopic manner along a first direction; and a pressing piece, which is movably arranged in the sliding cavity and is located between the printing lead assembly and the bottom of the sliding cavity; and a limiting structure, which is arranged between the connecting cylinder assembly and the printing lead assembly and is used for preventing the printing lead assembly from being pulled out of the sliding cavity; wherein when the telescopic printing lead device encounters resistance in the horizontal well, the end of the printing lead assembly away from the bottom of the sliding cavity is in contact with the resistance point in the well, the upper running string applies a pushing force to the telescopic printing lead device, the end of the printing lead assembly away from the bottom of the sliding cavity is deformed under the force to print a first lead mark, and the printing lead assembly slides towards the bottom of the sliding cavity along the first direction to press the pressing piece, so that the end of the printing lead assembly close to the bottom of the sliding cavity is deformed under the force to print a second lead mark.

[0007] In one embodiment, the connecting cylinder assembly comprises a string connector, one end of which is connected with the upper running string, and a sleeve which is detachably connected with the other end of the string connector; wherein the string connector and the sleeve define the sliding cavity, and the string connector has a central passage which is in communication with the sliding cavity.

[0008] In one embodiment, at least one sliding key groove is arranged on the inner cavity wall of the sleeve, the at least one sliding key groove is arranged in the first direction, and at least one vertical strip is arranged on the outer periphery of the printing lead assembly, the vertical strip is in sliding connection with the sliding key groove in the first direction.

[0009] In one embodiment, the printing lead assembly comprises a telescopic key, at least one vertical strip arranged on the outer periphery of the telescopic key, a rear lead mold fixed on the end of the telescopic key close to the bottom of the sliding cavity, and a front lead mold fixed on the end of the telescopic key away from the bottom of the sliding cavity; wherein the rear lead mold prints the second lead mark, and the front lead mold prints the first lead mark.

[0010] In one embodiment, the printing lead assembly further comprises an inner shaft, one end of which is detachably connected with the end of the telescopic key away from the bottom of the sliding cavity, and the other end of which is fixedly connected with the front lead mold.

[0011] In one embodiment, a first limiting recess is arranged in the front lead mold, and a first limiting boss is arranged on the outer periphery of the inner shaft, the first limiting recess and the first limiting boss are in concave-convex matching, so as to fix the front lead mold on the outer periphery of the inner shaft.

[0012] In one embodiment, a second limiting boss is arranged on the end of the telescopic key close to the bottom of the sliding cavity, and a second limiting recess is arranged in the rear lead mold, the second limiting recess and the second limiting boss are in concave-convex matching, so as to fix the rear lead mold on the telescopic key.

[0013] In one embodiment, the limiting structure comprises a blocking sleeve, which is detachably connected to the end of the telescopic key away from the cavity bottom and partially extends into the telescopic key, a limiting step is arranged on the outer periphery of the telescopic key, and the part of the blocking sleeve extending into the telescopic key is used to contact the limiting step to prevent the printing lead mold assembly from being taken out of the sliding cavity.

[0014] In one embodiment, the limiting structure comprises a blocking sleeve, which is detachably connected to the end of the telescopic key away from the cavity bottom and partially extends into the telescopic key, a limiting step is arranged on the outer periphery of the telescopic key, and the part of the blocking sleeve extending into the telescopic key is used to contact the limiting step to prevent the printing lead mold assembly from being taken out of the sliding cavity.

[0015] In one embodiment, a pin hole is arranged on the outer periphery of the telescopic key, a through hole corresponding to the pin hole is arranged on the sleeve, and a starting pin is arranged on the through hole and the pin hole to fix the sleeve on the telescopic key.

[0016] Compared with the prior art, the advantages of the present application are that when the telescopic printing lead mold device is in the horizontal section of the horizontal well, the extrusion piece is under the self-weight and the printing lead mold assembly is forced to print lead marks at the end away from the cavity bottom under the action of the pushing force, the situation of the wellbore is printed on the end of the printing lead mold assembly away from the cavity bottom, and the extrusion piece is also extruded to leave marks on the end of the printing lead mold assembly close to the cavity bottom. When the telescopic printing lead mold device is pulled out to the ground, the marks (second lead marks) left by the lead printing of the rear lead mold due to the extrusion piece under the self-weight in the horizontal section can be used as a reference point to reflect the marks (first lead marks) left by the lead printing on the front lead mold, and the type, size, deformation degree and direction of the falling object in the wellbore can be accurately determined by comparing the first lead marks and the second lead marks. Compared with the prior art which needs to be matched with logging technology to obtain the direction of the falling object or the direction of the wellbore deformation, the present application has the advantages of small construction difficulty, low cost, short construction time and significant economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0017] In the following, the present application will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0018] Figure 1 is the main sectional view of the telescopic printing lead mold device for horizontal wells in embodiment one of the present application;

[0019] Figure 2 is Figure 1 is the sectional view of the telescopic printing lead mold device A-A in embodiment one of the present application;

[0020] Figure 3 is the main sectional view of the telescopic printing lead mold device for horizontal wells in embodiment two of the present application.

[0021] Reference signs:

[0022] 10, connecting cylinder assembly; 11, sliding cavity; 12, pipe string connector; 121, central passage; 13, sleeve; 131, sliding key groove; 20, printing lead module assembly; 21, telescopic key; 211, limiting step; 212, vertical slot; 22, rear lead module; 23, front lead module; 24, inner shaft; 241, first limiting boss; 30, extrusion piece; 40, limiting structure; 41, blocking sleeve; 42, blocking ring; 50, starting pin. DETAILED DESCRIPTION

[0023] The application will be further described below with reference to the accompanying drawings.

[0024] Example 1

[0025] As shown in Figure 1 and Figure 2 , the application provides a telescopic printing lead module device for a horizontal well, which comprises a connecting cylinder assembly 10, a printing lead module assembly 20, an extrusion piece 30 and a limiting structure 40. The connecting cylinder assembly 10 is connected with an upper running pipe string at one end, and is provided with a sliding cavity 11 at the other end. The printing lead module assembly 20 is arranged in the sliding cavity 11 in a telescopic manner along a first direction. The extrusion piece 30 is movably arranged in the sliding cavity 11 between the printing lead module assembly 20 and the bottom of the sliding cavity 11. The limiting structure 40 is arranged between the connecting cylinder assembly 10 and the printing lead module assembly 20, and is used for preventing the printing lead module assembly 20 from being pulled out of the sliding cavity 11. When the telescopic printing lead module device encounters resistance in the horizontal well, the end of the printing lead module assembly 20 away from the bottom of the sliding cavity 11 is in contact with the resistance point in the well, the upper running pipe string applies a pushing force to the telescopic printing lead module device, the end of the printing lead module assembly 20 away from the bottom of the sliding cavity 11 is deformed to print a first lead mark, and at the same time, the printing lead module assembly 20 slides along the first direction towards the bottom of the sliding cavity 11 to extrude the extrusion piece 30, so that the end of the printing lead module assembly 20 close to the bottom of the sliding cavity 11 is deformed to print a second lead mark.

[0026] In the above arrangement, when the telescopic printing lead device is in the horizontal section of the horizontal well, the extrusion piece 30 is in the lower position under the action of gravity. At this time, the printing lead assembly 20 is blocked and is forced to move away from the end of the cavity bottom to print the lead mark. The wellbore condition is printed on the end of the printing lead assembly 20 away from the cavity bottom. At the same time, the extrusion piece 30 is also extruded and leaves marks on the end of the printing lead assembly 20 close to the cavity bottom. When the telescopic printing lead device is pulled out to the ground, the marks (second lead mark) left on the left side of the rear lead mark can be used as a reference point to find out the marks (first lead mark) left on the front lead mark when the lead mark is printed. In this way, the type, size, and position of the falling object in the horizontal section can be accurately determined. Compared with the existing technology that requires a matching logging technique to obtain the position of the falling object or the position of the wellbore deformation while printing the lead mark, the present application has the advantages of small construction difficulty, low cost, short construction time, and significant economic benefits.

[0027] Specifically, as shown in Figure 1 and Figure 2 In one embodiment, the connecting cylinder assembly 10 includes a pipe string connector 12 and a sleeve 13. The one end of the pipe string connector 12 is connected with the upper running pipe string, and the other end of the pipe string connector 12 is detachably connected with the sleeve 13. The pipe string connector 12 and the sleeve 13 define a sliding cavity 11, and the pipe string connector 12 has a central passage 121 which communicates with the sliding cavity 11.

[0028] In the above arrangement, the connecting cylinder assembly 10 is arranged in a split structure, so that when one of the sleeve 13 or the pipe string connector 12 is damaged, the problem of replacing the entire connecting cylinder assembly 10 is avoided. Thus, the use and maintenance cost of the telescopic printing lead device is saved.

[0029] Specifically, as shown in Figure 1 and Figure 2 In one embodiment, at least one sliding key groove 131 is arranged on the inner cavity wall of the sleeve 13, and the at least one sliding key groove 131 is arranged in the first direction. At least one vertical strip 212 is arranged on the outer periphery of the printing lead assembly 20, and the vertical strip 212 is slidably connected with the sliding key groove 131 in the first direction.

[0030] In the above arrangement, the sliding cooperation between the vertical strip 212 and the sliding key groove 131 can ensure that the printing lead assembly 20 slides in the first direction in the sliding cavity 11. Thus, the telescopic printing lead device for horizontal wells can work normally.

[0031] Specifically, as shown in Figure 1 and Figure 2As shown in the drawings, in one embodiment, a plurality of sliding key grooves 131 are arranged on the inner cavity wall of the sleeve 13, and the plurality of sliding key grooves 131 are arranged in the first direction. A plurality of vertical strips 212 are arranged on the outer periphery of the printing lead mold assembly 20, and the plurality of vertical strips 212 are slidably connected to the plurality of sliding key grooves 131 in the first direction. In this way, the stability and reliability of the sliding of the printing lead mold assembly 20 are improved.

[0032] Specifically, as shown in the drawings, Figure 1 and Figure 2 In one embodiment, the printing lead mold assembly 20 includes a telescopic key 21, a rear lead mold 22, and a front lead mold 23. The outer periphery of the telescopic key 21 is provided with a plurality of vertical strips 212, and the outer periphery of the telescopic key 21 is provided with a plurality of vertical strips 212. The rear lead mold 22 is fixed to one end of the telescopic key 21 close to the cavity bottom. The front lead mold 23 is fixed to one end of the telescopic key 21 away from the cavity bottom. The second lead mark is printed on the rear lead mold 22, and the first lead mark is printed on the front lead mold 23.

[0033] Specifically, as shown in the drawings, Figure 1 and Figure 2 In one embodiment, the printing lead mold assembly 20 further includes an inner shaft 24, one end of which is detachably connected to one end of the telescopic key 21 away from the cavity bottom, and the other end of the inner shaft 24 is fixedly connected to the front lead mold 23.

[0034] Specifically, as shown in the drawings, Figure 1 and Figure 2 In one embodiment, the front lead mold 23 is provided with a first limiting recess, and the outer periphery of the inner shaft 24 is provided with a first limiting boss 241. The first limiting recess and the first limiting boss 241 are matched to fix the front lead mold 23 on the outer periphery of the inner shaft 24.

[0035] In the above arrangement, the concave-convex matching structure is arranged, so that the front lead mold 23 can be stably fixed on the outer periphery of the inner shaft 24. Thus, the telescopic printing lead mold device can work normally.

[0036] Specifically, as shown in the drawings, Figure 1 and Figure 2 In one embodiment, a second limiting boss is arranged on one end of the telescopic key 21 close to the cavity bottom, and a second limiting recess is arranged in the rear lead mold 22. The second limiting recess and the second limiting boss are matched to fix the rear lead mold 22 on the telescopic key 21.

[0037] In the above arrangement, the concave-convex matching structure is arranged, so that the rear lead mold 22 can be stably fixed on the outer periphery of the telescopic key 21. Thus, the telescopic printing lead mold device can work normally.

[0038] Specifically, as shown in the drawings, Figure 1 and Figure 2As shown in the drawings, in one embodiment, the limiting structure 40 comprises a blocking sleeve 41, which is detachably connected with the end of the telescopic key 21 away from the cavity bottom and partially extends into the telescopic key 21. A limiting step 211 is arranged on the outer periphery of the telescopic key 21, and the part of the blocking sleeve 41 extending into the telescopic key 21 is used to contact with the limiting step 211, so as to prevent the printing lead module assembly 20 from being taken out of the sliding cavity 11.

[0039] Specifically, as shown in the drawings, Figure 1 and Figure 2 in one embodiment, the blocking sleeve 41 is threadedly connected with the end of the telescopic key 21 away from the cavity bottom.

[0040] Specifically, as shown in the drawings, Figure 3 and Figure 1 in one embodiment, a plurality of pin holes are arranged on the outer periphery of the telescopic key 21, the sleeve 13 is provided with a plurality of through holes corresponding to the plurality of pin holes one by one, and the telescopic printing lead module device further comprises an activation pin 50, which is arranged on the through hole and the pin hole to fix the sleeve 13 on the telescopic key 21.

[0041] Further, the present application provides a telescopic printing lead device for horizontal well, which comprises a pipe string connector 12, a sleeve 13, a steel ball (extrusion 30), a rear lead 22, a telescopic key 21, a starting pin 50, a blocking sleeve 41, an inner shaft 24, a front lead 23, the right end of the rear lead 22 is fixed to the left end of the telescopic key 21, the rear lead 22 cannot rotate on the telescopic key 21, the outer wall of the telescopic key 21 is provided with vertical grooves 212, the inner wall of the sleeve 13 is provided with sliding key grooves 131, the vertical grooves 212 on the outer wall of the telescopic key 21 are matched with the sliding key grooves 131 on the inner wall of the sleeve 13, the sleeve 13 and the telescopic key 21 are inserted into an integrated whole, after the sleeve 13 and the telescopic key 21 are inserted together, the sleeve 13 and the telescopic key 21 can only move axially relative to each other and cannot rotate relative to each other, the right end of the sleeve 13 is provided with an anti-falling mechanism, the anti-falling mechanism can prevent the telescopic key 21 from falling out of the right end of the sleeve 13 and limit the stroke of the telescopic key 21, the front lead 23 is cast on the right end of the inner shaft 24 and cannot move on the inner shaft 24, the front lead 23 is cast on the left end of the inner shaft 24, the left end of the inner shaft 24 is connected with the right end of the telescopic key 21, the telescopic key 21 and the front lead 23 cannot rotate relative to each other, the steel ball is placed in the telescopic key 21 and is located at the left end surface of the rear lead 22, the pipe string connector 12 is connected with the sleeve 13, the diameter of the steel ball is greater than the inner diameter of the pipe string connector 12 and the rear lead 22, the steel ball can move flexibly between the right end surface of the pipe string connector 12 and the left end surface of the rear lead 22, when the telescopic key 21 moves left in the sleeve 13 and the left end surface of the rear lead 22 and the right end surface of the pipe string connector 12 extrude the steel ball, the left end surface of the front lead 23 will not be limited, so as to ensure that the left end surface of the rear lead 22 and the right end surface of the pipe string connector 12 can extrude the steel ball. The blocking sleeve 41 is sleeved on the right part of the telescopic key 21, the blocking sleeve 41 is connected with the right end of the sleeve 13, the inner diameter of the blocking sleeve 41 is smaller than the outer edge of the telescopic key 21, so as to prevent the telescopic key 21 from separating from the sleeve 13. The starting pin 50 is installed between the sleeve 13 and the telescopic key 21, so that the sleeve 13 and the telescopic key 21 do not move axially during the process of lowering into the well, preventing the steel ball from being extruded, when the rear lead 22 encounters resistance and the pipe string applies an axial force of 20 KN during the process of lowering into the well, the starting pin 50 is cut off, so that the sleeve 13 and the telescopic key 21 can move axially. The inner shaft 24 is provided with a boss, which serves to fix the front lead 23 and prevent the front lead 23 from falling off.

[0042] Example two

[0043] As Figure 3 shown, the present application provides a telescopic printing lead device for horizontal well, as Figure 3As shown, the present application provides a telescopic printing lead device for horizontal wells, which comprises a connecting cylinder assembly 10, a printing lead assembly 20, an extrusion piece 30 and a limiting structure 40. Wherein, one end of the connecting cylinder assembly 10 is connected with an upper running string, and the other end of the connecting cylinder assembly 10 is provided with a sliding cavity 11; the printing lead assembly 20 is arranged in the sliding cavity 11 in a telescopic manner along a first direction; the extrusion piece 30 is movably arranged in the sliding cavity 11 and located between the printing lead assembly 20 and the bottom of the sliding cavity 11; the limiting structure 40 is arranged between the connecting cylinder assembly 10 and the printing lead assembly 20, and is used for preventing the printing lead assembly 20 from being pulled out of the sliding cavity 11; when the telescopic printing lead device encounters resistance in the horizontal well, the end of the printing lead assembly 20 away from the bottom of the sliding cavity 11 is in contact with the resistance point in the well, the upper running string applies a pushing force to the telescopic printing lead device, the end of the printing lead assembly 20 away from the bottom of the sliding cavity 11 is deformed by the force to print a first lead mark, and at the same time, the printing lead assembly 20 slides along the first direction towards the bottom of the sliding cavity 11 to extrude the extrusion piece 30, so that the end of the printing lead assembly 20 close to the bottom of the sliding cavity 11 is deformed by the force to print a second lead mark.

[0044] In the above arrangement, when the telescopic printing lead device is in the horizontal section of the horizontal well, the extrusion piece 30 is in the lower position under the action of gravity, at this time, the printing lead assembly 20 is resisted by the pushing force, the end of the printing lead assembly 20 away from the bottom of the sliding cavity 11 is deformed by the force to print a lead mark, and the situation of the wellbore is printed on the end of the printing lead assembly 20 away from the bottom of the sliding cavity 11, at the same time, the extrusion piece 30 is extruded and also leaves a mark on the end of the printing lead assembly 20 close to the bottom of the sliding cavity 11, when the telescopic printing lead device is pulled out to the ground, the mark (second lead mark) left on the left side of the rear lead module can be used as a reference point to find out the mark (first lead mark) left when the lead mark is printed on the front lead module, and the direction of the mark in the wellbore. In this way, the type and size of the falling object, the deformation degree of the wellbore and the direction of the wellbore in the horizontal section can be accurately judged. Compared with the existing technology which needs to be matched with logging technology to obtain the direction of the falling object or the direction of the wellbore deformation at the same time of printing the lead mark, the present application has the advantages of small construction difficulty, low cost, short construction time and significant economic benefits.

[0045] Specifically, as shown in the drawings, Figure 3 In one embodiment, the connecting cylinder assembly 10 comprises a string connector 12 and a sleeve 13. Wherein, one end of the string connector 12 is connected with the upper running string; the sleeve 13 is detachably connected with the other end of the string connector 12. The string connector 12 and the sleeve 13 define the sliding cavity 11, and the string connector 12 has a central passage 121 which communicates with the sliding cavity 11.

[0046] In the above arrangement, the connecting cylinder assembly 10 is arranged in a split structure, so as to avoid the problem of the whole connecting cylinder assembly 10 needing to be replaced when one of the sleeve 13 or the pipe string connector 12 is damaged. Thus, the use and maintenance cost of the telescopic printing lead mold device is saved.

[0047] Specifically, as shown in the drawings, in one embodiment, the inner cavity wall of the sleeve 13 is provided with at least one sliding key groove 131, and the outer periphery of the printing lead mold assembly 20 is provided with at least one vertical strip 212 which is in sliding connection with the sliding key groove 131 in the first direction. Figure 3

[0048] In the above arrangement, the sliding cooperation of the vertical strip 212 and the sliding key groove 131 can ensure that the printing lead mold assembly 20 slides in the first direction in the sliding cavity 11. Thus, the telescopic printing lead mold device for horizontal wells can work normally.

[0049] Specifically, as shown in the drawings, in one embodiment, the inner cavity wall of the sleeve 13 is provided with at least one sliding key groove 131, and the outer periphery of the printing lead mold assembly 20 is provided with at least one vertical strip 212 which is in sliding connection with the sliding key groove 131 in the first direction. Figure 3

[0050] Specifically, as shown in the drawings, in one embodiment, the inner cavity wall of the sleeve 13 is provided with at least one sliding key groove 131, and the outer periphery of the printing lead mold assembly 20 is provided with at least one vertical strip 212 which is in sliding connection with the sliding key groove 131 in the first direction. Figure 3

[0051] Specifically, as shown in the drawings, in one embodiment, the printing lead mold assembly 20 includes a telescopic key 21, a rear lead mold 22 and a front lead mold 23. The outer periphery of the telescopic key 21 is provided with a plurality of vertical strips 212, and the outer periphery of the telescopic key 21 is provided with a plurality of vertical strips 212. The rear lead mold 22 is fixed to one end of the telescopic key 21 close to the cavity bottom, and the front lead mold 23 is fixed to one end of the telescopic key 21 away from the cavity bottom. The rear lead mold 22 is marked with a second lead mark, and the front lead mold 23 is marked with a first lead mark. Figure 3

[0052] Specifically, as shown in the drawings, in one embodiment, the printing lead mold assembly 20 further includes an inner shaft 24, one end of which is detachably connected to one end of the telescopic key 21 away from the cavity bottom, and the other end of the inner shaft 24 is fixedly connected to the front lead mold 23. Figure 3

[0053] ​​​​​In the above arrangement, the concave-convex matching structure is arranged, so as to ensure that the front lead mold 23 is stably fixed on the outer periphery of the inner shaft 24. Thus, the telescopic printing lead mold device can work normally.

[0054] Specifically, as shown in the figure, Figure 3 In one embodiment, the telescopic key 21 is provided with a second limiting boss on one end close to the cavity bottom, and the rear lead mold 22 is provided with a second limiting groove. The second limiting groove and the second limiting boss are in concave-convex matching, so as to fix the rear lead mold 22 on the telescopic key 21.

[0055] In the above arrangement, the concave-convex matching structure is arranged, so as to ensure that the rear lead mold 22 is stably fixed on the outer periphery of the telescopic key 21. Thus, the telescopic printing lead mold device can work normally.

[0056] Specifically, as shown in the figure, Figure 3 In one embodiment, the limiting structure 40 includes a check ring 42, the telescopic key 21 is provided with a mounting groove on one end away from the cavity bottom, and the check ring 42 is mounted in the mounting groove. The outer periphery of the telescopic key 21 is provided with a limiting step 211, and the check ring 42 is used to contact with the limiting step 211, so as to prevent the printing lead mold assembly 20 from being taken out of the sliding cavity 11.

[0057] Specifically, as shown in the figure, ​ In one embodiment, the sleeve 41 is threadedly connected with one end of the telescopic key 21 away from the cavity bottom.

[0058] Specifically, as shown in the figure, ​ In one embodiment, the outer periphery of the telescopic key 21 is provided with a plurality of pin holes, and the sleeve 13 is provided with a plurality of through holes corresponding to the plurality of pin holes one by one. The telescopic printing lead mold device further includes an activation pin 50, which is arranged on the through hole and the pin hole, so as to fix the sleeve 13 on the telescopic key 21.

[0059] Further, the application provides a telescopic printing lead device for horizontal well, which comprises a pipe string connector 12, a key sleeve pipe (sleeve pipe 13), a steel ball, a rear lead mold 22, a telescopic key 21, a starting pin 50, an inner shaft 24, a front lead mold 23, a hole axial stop ring (stop ring 42), the right end of the rear lead mold 22 is fixed at the left end of the telescopic key 21, the rear lead mold 22 cannot rotate on the telescopic key 21, the outer wall of the telescopic key 21 has vertical grooves 212, the inner wall of the key sleeve pipe has key grooves (sliding key grooves 131), the vertical grooves 212 on the outer wall of the telescopic key 21 are matched with the key grooves on the inner wall of the key sleeve pipe, the key sleeve pipe and the telescopic key 21 are integrally inserted, after the key sleeve pipe and the telescopic key 21 are inserted together, the key sleeve pipe and the telescopic key 21 can only move axially relative to each other and cannot rotate relative to each other, a anti-disengagement mechanism is arranged at the right end of the key sleeve pipe, the anti-disengagement mechanism can prevent the telescopic key 21 from disengaging from the right end of the key sleeve pipe and limit the stroke of the telescopic key 21, the front lead mold 23 is cast at the right end of the inner shaft 24 and is fixed on the inner shaft 24, the front lead mold 23 is cast at the left end of the inner shaft 24 and the left end of the inner shaft 24 is connected with the right end of the telescopic key 21, the telescopic key 21 and the front lead mold 23 cannot rotate relative to each other, the steel ball is placed in the telescopic key 21 and is located at the left end surface of the rear lead mold 22, the pipe string connector 12 is connected with the key sleeve pipe, the diameter of the steel ball is greater than the inner diameter of the pipe string connector 12 and the rear lead mold 22, the steel ball can move flexibly between the right end surface of the pipe string connector 12 and the left end surface of the rear lead mold 22, when the telescopic key 21 moves left in the key sleeve pipe and the left end surface of the rear lead mold 22 and the right end surface of the pipe string connector 12 press the steel ball, the left end surface of the front lead mold 23 will not be limited, which ensures that the left end surface of the rear lead mold 22 and the right end surface of the pipe string connector 12 can press the steel ball. The hole axial stop ring 42 is installed in the right end hole of the key sleeve pipe, the inner diameter of the hole axial stop ring is smaller than the outer edge of the telescopic key 21, which prevents the telescopic key 21 from disengaging from the key sleeve pipe. The starting pin 50 is installed between the key sleeve pipe and the telescopic key 21, which prevents the steel ball from being pressed and the telescopic key 21 from moving axially relative to the key sleeve pipe during the process of lowering into the well, when the rear lead mold 22 encounters resistance and the pipe string applies an axial force of 20 KN during the process of lowering into the well, the starting pin 50 is cut off, and the telescopic key 21 and the key sleeve pipe can move axially relative to each other. The inner shaft 24 is provided with a boss, which serves to fix the front lead mold 23 and prevent the front lead mold 23 from falling off.

[0060] When the horizontal section of the horizontal well has fallen objects, deformation and reduced diameter, the telescopic printing lead device is located behind the well section, the steel ball is located below under the action of gravity at this time, the front lead mold 23 encounters resistance and applies a pushing force greater than 20 KN, the starting pin 50 is cut off, the condition of the well bore is printed on the front lead mold 23, and the printing of the lead is realized. At the same time, the steel ball is pressed and also leaves marks on the left side of the rear lead mold 22, when the telescopic printing lead device is pulled out to the ground, the marks left on the left side of the rear lead mold 22 can be used as a reference point to find out what direction the marks left on the front lead mold 23 when printing the lead are from.

[0061] While the present application has been described with reference to the preferred embodiments, it is to be understood that various modifications can change the scope of the present application to be various improvements and can be replaced with equivalent parts. In particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A telescopic printing lead mold device for horizontal wells, characterized in that, include: A connecting tube assembly (10) is provided with a sliding cavity (11) at one end and the connecting tube assembly (10) is provided with a sliding cavity (11) at the other end. as well as The printing lead mold assembly (20) is telescopically disposed within the sliding cavity (11) along a first direction; and The extrusion piece (30) is movably disposed within the sliding cavity (11) and located between the printing lead mold assembly (20) and the bottom of the sliding cavity (11); A limiting structure (40) is provided between the connecting cylinder assembly (10) and the printing lead mold assembly (20) to prevent the printing lead mold assembly (20) from dislodging from the sliding cavity (11); When the telescopic printing lead mold device encounters obstruction in the horizontal well, the end of the printing lead mold assembly (20) away from the bottom of the cavity comes into contact with the obstruction point downhole. The upper feed string applies a thrust to the telescopic printing lead mold device. The end of the printing lead mold assembly (20) away from the bottom of the cavity is deformed by force and leaves a first lead mark. At the same time, the printing lead mold assembly (20) slides along the first direction toward the bottom of the sliding cavity (11) to squeeze the extrusion member (30), so that the end of the printing lead mold assembly (20) near the bottom of the cavity is deformed by force and leaves a second lead mark. The connecting cylinder assembly (10) includes: The tubing connector (12) has one end connected to the upper feed tubing; and The sleeve (13) is detachably connected to the other end of the pipe connector (12); At least one sliding keyway (131) is provided on the inner wall of the sleeve (13), the at least one sliding keyway (131) extends along the first direction, and at least one vertical strip (212) is provided on the outer periphery of the printing lead mold assembly (20), the vertical strip and the sliding keyway (131) are slidably connected in the first direction; The printing lead mold assembly (20) includes: The telescopic key (21) has at least one vertical rib on its outer periphery; and The rear lead mold (22) is fixed to one end of the telescopic key (21) near the bottom of the cavity; and The front lead mold (23) is fixed on the end of the telescopic key (21) away from the bottom of the cavity; The second lead stamp is applied to the rear lead mold (22), and the first lead stamp is applied to the front lead mold (23).

2. The telescopic printing lead mold device for horizontal wells according to claim 1, characterized in that, The tubing connector (12) and the sleeve (13) define the sliding cavity (11). The tubing connector (12) has a central channel (121) that communicates with the sliding cavity (11).

3. The telescopic printing lead mold device for horizontal wells according to claim 2, characterized in that, The printing lead mold assembly (20) also includes an inner shaft (24), one end of which is detachably connected to the end of the telescopic key (21) away from the bottom of the cavity, and the other end of the inner shaft (24) is fixedly connected to the front lead mold (23).

4. The telescopic printing lead mold device for horizontal wells according to claim 3, characterized in that, The front lead mold (23) is provided with a first limiting groove, and the inner shaft (24) is provided with a first limiting boss (241) on its outer periphery. The first limiting groove and the first limiting boss are in a concave-convex fit to fix the front lead mold (23) on the outer periphery of the inner shaft (24).

5. The telescopic printing lead mold device for horizontal wells according to claim 1, characterized in that, A second limiting boss is provided on one end of the telescopic key (21) near the bottom of the cavity, and a second limiting groove is provided inside the rear lead mold (22). The second limiting groove and the second limiting boss are in a concave-convex fit to fix the rear lead mold (22) on the telescopic key (21).

6. The telescopic printing lead mold device for horizontal wells according to claim 1, characterized in that, The limiting structure (40) includes a retainer (41), which is detachably connected to the end of the telescopic key (21) away from the bottom of the cavity and extends partially into the telescopic key (21). A limiting step (211) is provided on the outer periphery of the telescopic key (21). The part of the retainer (41) extending into the telescopic key (21) is used to contact the limiting step (211) to prevent the printing lead mold assembly (20) from coming out of the sliding cavity (11).

7. The telescopic printing lead mold device for horizontal wells according to claim 1, characterized in that, The limiting structure (40) includes a retaining ring (42). The sleeve (13) has an installation groove at one end away from the bottom of the cavity. The retaining ring (42) is installed in the installation groove. The telescopic key (21) has a limiting step (211) on its outer periphery. The retaining ring (42) is used to contact the limiting step (211) to prevent the printing lead mold assembly (20) from coming out of the sliding cavity (11).

8. The telescopic printing lead mold device for horizontal wells according to claim 1, characterized in that, The telescopic key (21) has a pin hole on its outer periphery, and the sleeve (13) has a through hole corresponding to the pin hole. The telescopic printing lead mold device also includes a starting pin (50), which passes through the through hole and the pin hole to fix the sleeve (13) on the telescopic key (21).

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