Telescopic printing lead mold device for horizontal well

Abstract

The invention relates to a telescopic printing lead mold device for a horizontal well, relates to the field of oil well workover technical equipment, and is used for solving the problems of higher construction difficulty, higher cost and longer construction time caused by the use of a printing lead mold device matched with a well logging technology. One end of the connecting cylinder assembly is connected with an upper feeding pipe column, and the other end of the connecting cylinder assembly is provided with a sliding cavity; the printing lead mold assembly is telescopically arranged in the sliding cavity in the first direction; the extrusion part is movably arranged in the sliding cavity and located between the printing lead mold assembly and the cavity bottom of the sliding cavity; and the limiting structure is arranged between the connecting cylinder assembly and the printing lead mold assembly and used for preventing the printing lead mold assembly from being separated from the sliding cavity. When the device is pulled out to the ground, the second lead print is used as a reference point, and the specific generation direction of the first lead print in the shaft can be found. Therefore, the falling object type, the deformation degree of large and small shafts and the position of the shaft can be accurately judged in the descending horizontal section.

Description

Technical Field

[0001] The invention relates to the field of oil well repair technology equipment, in particular to a telescopic printing lead mold device for horizontal wells. Background Art

[0002] During the production process, some tools may fall into the oil and water wells in the oil field, or the wellbore may be deformed. After these situations occurred, the construction team did not describe the real situation at that time due to the lack of management level and technical ability, as well as the fear of responsibility. When the oil and water wells need to be repaired after a period of production or shutdown, it is impossible for the previous construction team to carry out the operation, and there will be a problem of not understanding the situation downhole. In this case, in order to understand the situation in the well, it is necessary to lower the lead print to observe the shape of the upper end surface of the fallen object and the deformation of the wellbore, so as to determine the type, size and degree of deformation of the fallen object. This method is called lead printing in oil well repair. 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 after it is lowered into the well, the metal lead will first contact the fallen object or deformed part in the casing. Due to the low hardness of the metal lead, after the metal lead contacts the fallen object or deformed part in the casing, it will leave a mark on the lead mold. It can be pulled out to the ground and the traces on the lead mold are analyzed to determine the situation downhole.

[0003] However, since the lead stamping area is located thousands of meters below the surface of the well, the existing technology can determine some of the underground conditions through the traces on the lead mold after lead stamping, but it cannot determine the location of the objects in the well or the location of the wellbore deformation. If the location of the objects in the well or the location of the wellbore deformation cannot be determined, it will be difficult to formulate the next technical measures, which will affect the well repair operation of oil and water wells. In order to solve the above problems, it is necessary to use logging technology at the same time as lead stamping to obtain the location of the objects in the well or the location of the wellbore deformation. However, the use of logging technology when making lead stamps is difficult, expensive, and takes a long time to construct.

[0004] That is to say, the printing lead mold device in the prior art needs to be equipped with well logging technology when printing lead, which easily leads to problems such as greater construction difficulty, higher cost and longer construction time. Summary of the invention

[0005] The invention provides a telescopic printing lead mold device for a horizontal well, which is used to solve the problems of greater construction difficulty, higher cost and longer construction time caused by the use of a matching logging technology for the printing lead mold device.

[0006] The present invention provides a telescopic printing lead mold device for a horizontal well, comprising: a connecting tube assembly, one end of which is connected to an upper delivery pipe column, and the other end of the connecting tube assembly is provided with a sliding cavity; and a printing lead mold assembly, which is telescopically arranged in the sliding cavity along a first direction; and an extrusion piece, which is movably arranged in the sliding cavity and is located between the printing lead mold assembly and the cavity bottom of the sliding cavity; a limiting structure, which is arranged between the connecting tube assembly and the printing lead mold assembly and is used to prevent the printing lead mold assembly from escaping from the sliding cavity; wherein, when the telescopic printing lead mold device encounters an obstacle in the horizontal well, the end of the printing lead mold assembly away from the cavity bottom contacts with the obstruction point downhole, the upper delivery pipe column applies a thrust to the telescopic printing lead mold device, and the end of the printing lead mold assembly away from the cavity bottom is deformed by force and is marked with a first lead print, and at the same time, the printing lead mold assembly slides toward the cavity bottom of the sliding cavity along the first direction to extrude the extrusion piece, so that the end of the printing lead mold assembly close to the cavity bottom is deformed by force and is marked with a second lead print.

[0007] In one embodiment, the connecting tube assembly includes: a tubular column connector, one end of which is connected to the upper delivery tubular column; and a casing, which is detachably connected to the other end of the tubular column connector; wherein the tubular column connector and the casing define a sliding cavity, and the tubular column connector has a central channel, which is connected to the sliding cavity.

[0008] In one embodiment, at least one sliding key slot is provided on the inner cavity wall of the sleeve, and the at least one sliding key slot extends along the first direction. At least one vertical bar is provided on the outer periphery of the printing lead mold assembly, and the vertical bar is slidably connected to the sliding key slot in the first direction.

[0009] In one embodiment, the printing lead mold assembly includes: a telescopic key, on the periphery of which is provided with at least one vertical bar; and a rear lead mold, fixed on one end of the telescopic key close to the cavity bottom; and a front lead mold, fixed on one end of the telescopic key away from the cavity bottom; wherein the rear lead mold is stamped with a second lead print, and the front lead mold is stamped with a first lead print.

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

[0011] In one embodiment, a first limiting groove is provided in the front lead mold, and a first limiting boss is provided on the outer periphery of the inner shaft. The first limiting groove and the first limiting boss are matched in a concave-convex manner to fix the front lead mold on the outer periphery of the inner shaft.

[0012] In one embodiment, a second limiting boss is provided on one end of the telescopic key close to the cavity bottom, and a second limiting groove is provided in the rear lead mold. The second limiting groove and the second limiting boss cooperate with each other to fix the rear lead mold on the telescopic key.

[0013] In one embodiment, the limiting structure includes a stopper sleeve, which is detachably connected to the end of the telescopic key away from the bottom of the cavity and partially extends into the telescopic key. A limiting step is provided on the outer periphery of the telescopic key, and the portion of the stopper sleeve extending into the telescopic key is used to contact the limiting step to prevent the printing lead mold assembly from falling out of the sliding cavity.

[0014] In one embodiment, the limiting structure includes a retaining ring, a mounting groove is provided on the end of the sleeve away from the bottom of the cavity, the retaining ring is installed in the mounting groove, a limiting step is provided on the outer periphery of the telescopic key, and the retaining ring is used to contact the limiting step to prevent the printing lead mold assembly from falling out of the sliding cavity.

[0015] In one embodiment, a pin hole is provided on the outer periphery of the telescopic key, and a through hole corresponding to the pin hole is opened on the sleeve. The telescopic printing lead mold device also includes a starting pin, which is passed through the through hole and the pin hole to fix the sleeve on the telescopic key.

[0016] Compared with the prior art, the advantage of the present invention is that when the telescopic printing lead mold device is in the horizontal section of the horizontal well, the extrusion piece is at the bottom under the action of its own weight. At this time, the printing lead mold component encounters resistance and is forced to print the lead at the end away from the bottom of the cavity under the action of thrust. The situation of the wellbore is printed on the end of the printing lead mold component away from the bottom of the cavity. At the same time, the extrusion piece is squeezed and leaves a mark on the end of the printing lead mold component close to the bottom of the cavity. When the telescopic printing lead mold device is lifted to the ground, the mark (second lead print) left by the lead mold when the extrusion piece is at the bottom of the horizontal section under its own gravity can be used as a reference point to compare the mark (first lead print) left on the front lead mold when printing. By comparing and analyzing the first lead print and the second lead print, the type of falling objects, the degree of deformation of the wellbore and the position of the wellbore can be accurately judged by going down to the horizontal section. Compared with the existing technology that requires the use of logging technology at the same time as lead printing to obtain the location of fallen objects in the well or the location of wellbore deformation, it has the advantages of less construction difficulty, low cost, and short construction time, thus having significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 1 It is a main cross-sectional view of a telescopic printing lead mold device for a horizontal well in the first embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A cross-sectional view of the telescopic printing lead mold device at AA;

[0020] Figure 3 It is a main cross-sectional view of a telescopic printing lead mold device for a horizontal well in the second embodiment of the present invention.

[0021] Reference numerals:

[0022] 10. Connecting cylinder assembly; 11. Sliding cavity; 12. Pipe column connector; 121. Center channel; 13. Sleeve; 131. Sliding keyway; 20. Printing lead mold assembly; 21. Telescopic key; 211. Limiting step; 212. Vertical bar; 22. Rear lead mold; 23. Front lead mold; 24. Inner shaft; 241. First limiting boss; 30. Extrusion piece; 40. Limiting structure; 41. Stop sleeve; 42. Stop ring; 50. Start pin. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Embodiment 1

[0025] like Figure 1 and Figure 2 As shown, the present invention provides a telescopic printing lead mold device for a horizontal well, which includes a connecting tube assembly 10, a printing lead mold assembly 20, an extrusion piece 30 and a limiting structure 40. Among them, one end of the connecting tube assembly 10 is connected to the upper delivery pipe column, and the other end of the connecting tube assembly 10 is provided with a sliding cavity 11; the printing lead mold assembly 20 is telescopically arranged in the sliding cavity 11 along the first direction; the extrusion piece 30 is movably arranged in the sliding cavity 11, and is located between the printing lead mold assembly 20 and the cavity bottom of the sliding cavity 11; the limiting structure 40 is arranged between the connecting tube assembly 10 and the printing lead mold assembly 20, and is used to prevent the printing lead mold assembly 20 from escaping from the sliding cavity 11; when the telescopic printing lead mold device encounters an obstacle in the horizontal well, the end of the printing lead mold assembly 20 away from the cavity bottom contacts the obstruction point underground, and the upper delivery pipe column applies a thrust to the telescopic printing lead mold device, and the end of the printing lead mold assembly 20 away from the cavity bottom is deformed by force and stamped with a first lead print, and at the same time, the printing lead mold assembly 20 slides toward the cavity bottom of the sliding cavity 11 along the first direction to extrude the extrusion piece 30, so that the end of the printing lead mold assembly 20 close to the cavity bottom is deformed by force and stamped with a second lead print.

[0026] In the above configuration, when the telescopic printing lead mold device is in the horizontal section of the horizontal well, the extrusion piece 30 is at the bottom under the action of its own weight. At this time, the printing lead mold assembly 20 encounters resistance and is forced to print the lead at the end away from the bottom of the cavity under the action of thrust. The situation of the wellbore is printed on the end of the printing lead mold assembly 20 away from the bottom of the cavity. At the same time, the extrusion piece 30 is squeezed and leaves a mark on the end of the printing lead mold assembly 20 close to the bottom of the cavity. When the telescopic printing lead mold device is lifted to the ground, the mark left on the left side of the rear lead mold (the second lead print) can be used as a reference point to find out what position in the wellbore the mark left on the front lead mold when printing the lead (the first lead print) is produced. In this way, the type of falling objects, the degree of deformation of the wellbore and the position of the wellbore can be accurately judged by going down to the horizontal section. Compared with the existing technology that requires the use of well logging technology at the same time as printing the lead to obtain the position of the falling objects in the well or the position of the wellbore deformation, it has the advantages of low construction difficulty, low cost and short construction time, thus having significant economic benefits.

[0027] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, the connecting tube assembly 10 includes a tubular column connector 12 and a casing 13. One end of the tubular column connector 12 is connected to the upper delivery tubular column; the casing 13 is detachably connected to the other end of the tubular column connector 12. The tubular column connector 12 and the casing 13 define a sliding cavity 11, and the tubular column connector 12 has a central channel 121, which is communicated with the sliding cavity 11.

[0028] In the above arrangement, the connecting tube assembly 10 is arranged as a split structure, so as to avoid the problem that the connecting tube assembly 10 needs to be replaced as a whole when one of the casing 13 or the pipe column connector 12 is damaged. Thus, the use and maintenance cost of the telescopic printing lead mold device is saved.

[0029] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, at least one sliding key groove 131 is provided on the inner cavity wall of the sleeve 13, and the at least one sliding key groove 131 is extended along the first direction. At least one vertical bar 212 is provided on the periphery of the printing lead mold assembly 20, and the vertical bar 212 is slidably connected to the sliding key groove 131 in the first direction.

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

[0031] Specifically, Figure 1 and Figure 2As shown, in one embodiment, a plurality of sliding key slots 131 are provided on the inner cavity wall of the sleeve 13, and the plurality of sliding key slots 131 are extended along the first direction, and a plurality of vertical bars 212 are provided on the outer periphery of the printing lead mold assembly 20, and the plurality of vertical bars 212 are slidably connected with the plurality of sliding key slots 131 in a one-to-one correspondence in the first direction. This improves the sliding stability and reliability of the printing lead mold assembly 20.

[0032] Specifically, Figure 1 and Figure 2 As shown, 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. Among them, a plurality of vertical bars 212 are arranged on the periphery of the telescopic key 21; a plurality of vertical bars 212 are arranged on the periphery of the telescopic key 21; the rear lead mold 22 is fixed on one end of the telescopic key 21 close to the cavity bottom; the front lead mold 23 is fixed on one end of the telescopic key 21 away from the cavity bottom. The second lead print is printed on the rear lead mold 22, and the first lead print is printed on the front lead mold 23.

[0033] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, the printing lead mold assembly 20 also includes an inner shaft 24, one end of which is detachably connected to an 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, Figure 1 and Figure 2 As shown, in one embodiment, a first limiting groove is provided in the front lead mold 23, and a first limiting boss 241 is provided on the outer periphery of the inner shaft 24. The first limiting groove and the first limiting boss 241 are matched with each other to fix the front lead mold 23 on the outer periphery of the inner shaft 24.

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

[0036] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, a second limiting boss is provided on one end of the telescopic key 21 close to the bottom of the cavity, and a second limiting groove is provided in the rear lead mold 22. The second limiting groove and the second limiting boss cooperate with each other to fix the rear lead mold 22 on the telescopic key 21.

[0037] In the above arrangement, a concave-convex matching structure is provided, so as to ensure 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, Figure 1 and Figure 2As shown, in one embodiment, the limiting structure 40 includes a stopper sleeve 41, which is detachably connected to the end of the telescopic key 21 away from the bottom of the cavity and partially extends into the telescopic key 21. A limiting step 211 is provided on the outer periphery of the telescopic key 21, and the portion of the stopper sleeve 41 extending into the telescopic key 21 is used to contact the limiting step 211 to prevent the printing lead mold assembly 20 from escaping from the sliding cavity 11.

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

[0040] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, a plurality of pin holes are provided on the outer periphery of the telescopic key 21, a plurality of through holes corresponding to the plurality of pin holes are opened in the sleeve 13, and the telescopic printing lead mold device also includes a starting pin 50, which is passed through the through hole and the pin hole to fix the sleeve 13 on the telescopic key 21.

[0041] Furthermore, the present invention provides a telescopic printing lead mold device for a horizontal well, which includes a pipe column connector 12, a casing 13, a steel ball (extrusion piece 30), a rear lead mold 22, a telescopic key 21, a start pin 50, a stopper sleeve 41, an inner shaft 24, and a front lead mold 23. The right end of the rear lead mold 22 is fixed to the left end of the telescopic key 21, and the rear lead mold 22 cannot rotate on the telescopic key 21. A vertical bar 212 is provided on the outer wall of the telescopic key 21, and a sliding key groove 131 is provided on the inner wall of the casing 13. The vertical bar 212 on the outer wall of the telescopic key 21 is matched with the sliding key groove 131 on the inner wall of the casing 13. The casing 13 and the telescopic key 21 are plugged into one piece. After the casing 13 and the telescopic key 21 are plugged together, the casing 13 and the telescopic key 21 can only move axially relative to each other but cannot rotate relative to each other. An anti-slip mechanism is provided at the right end of the casing 13, and the anti-slip mechanism can prevent the telescopic key 21 from slipping out of the casing The right end of 13 is out of the way, limiting the travel of the telescopic key 21, the front lead mold 23 is cast on the right end of the inner shaft 24, the front lead mold 23 is fixed on the inner shaft 24, the front lead mold 23 is cast on the left end of the inner shaft 24, the left end of the inner shaft 24 is connected to 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, the steel ball is on the left end face of the rear lead mold 22, and the pipe column connector 12 is connected to the sleeve 13 The diameter of the steel ball is larger than the inner diameter of the column connector 12 and the rear lead mold 22. The steel ball can move flexibly between the right end face of the column connector 12 and the left end face of the rear lead mold 22. The telescopic key 21 moves leftward in the sleeve 13, so that when the left end face of the rear lead mold 22 and the right end face of the column connector 12 squeeze the steel ball, the left end face of the front lead mold 23 will not be limited, ensuring that the left end face of the rear lead mold 22 and the right end face of the column connector 12 can squeeze the steel ball. The stopper sleeve 41 is sleeved on the right part of the telescopic key 21, and the stopper sleeve 41 is connected to the right end of the sleeve 13. The inner diameter of the stopper sleeve 41 is smaller than the outer edge of the telescopic key 21, preventing the telescopic key 21 from detaching from the sleeve 13. A starting pin 50 is installed between the casing 13 and the telescopic key 21, so that the casing 13 and the telescopic key 21 do not move axially during the process of going down the well, and the steel ball is prevented from being squeezed. When the rear lead mold 22 encounters resistance during the process of going down the well, the starting pin 50 is sheared off when the pipe string applies an axial force of 20KN, and the casing 13 and the telescopic key 21 can move axially. A boss is set on the inner shaft 24 to fix the front lead mold 23 and prevent the front lead mold 23 from falling off.

[0042] Embodiment 2

[0043] like Figure 3 As shown, the present invention provides a telescopic printing lead mold device for horizontal wells, such as Figure 1As shown, the present invention provides a telescopic printing lead mold device for a horizontal well, which includes a connecting tube assembly 10, a printing lead mold assembly 20, an extrusion piece 30 and a limiting structure 40. Among them, one end of the connecting tube assembly 10 is connected to the upper delivery pipe column, and the other end of the connecting tube assembly 10 is provided with a sliding cavity 11; the printing lead mold assembly 20 is telescopically arranged in the sliding cavity 11 along the first direction; the extrusion piece 30 is movably arranged in the sliding cavity 11, and is located between the printing lead mold assembly 20 and the cavity bottom of the sliding cavity 11; the limiting structure 40 is arranged between the connecting tube assembly 10 and the printing lead mold assembly 20, and is used to prevent the printing lead mold assembly 20 from escaping from the sliding cavity 11; when the telescopic printing lead mold device encounters an obstacle in the horizontal well, the end of the printing lead mold assembly 20 away from the cavity bottom contacts the obstruction point underground, and the upper delivery pipe column applies a thrust to the telescopic printing lead mold device, and the end of the printing lead mold assembly 20 away from the cavity bottom is deformed by force and stamped with a first lead print, and at the same time, the printing lead mold assembly 20 slides toward the cavity bottom of the sliding cavity 11 along the first direction to extrude the extrusion piece 30, so that the end of the printing lead mold assembly 20 close to the cavity bottom is deformed by force and stamped with a second lead print.

[0044] In the above configuration, when the telescopic printing lead mold device is in the horizontal section of the horizontal well, the extrusion piece 30 is at the bottom under the action of its own weight. At this time, the printing lead mold assembly 20 encounters resistance and the end of the printing lead mold assembly 20 away from the cavity bottom is subjected to force to print under the action of thrust. The situation of the wellbore is printed on the end of the printing lead mold assembly 20 away from the cavity bottom. At the same time, the extrusion piece 30 is squeezed and leaves a mark on the end of the printing lead mold assembly 20 close to the cavity bottom. When the telescopic printing lead mold device is lifted to the ground, the mark left on the left side of the rear lead mold (the second lead print) can be used as a reference point to find out what position in the wellbore the mark left on the front lead mold when printing (the first lead print) is produced. In this way, the type of falling objects, the degree of deformation of the wellbore and the position of the wellbore can be accurately judged by going down to the horizontal section. Compared with the existing technology that requires the use of well logging technology at the same time as printing to obtain the position of the falling objects in the well or the position of the wellbore deformation, it has the advantages of low construction difficulty, low cost and short construction time, thus having significant economic benefits.

[0045] Specifically, Figure 3 As shown, in one embodiment, the connecting tube assembly 10 includes a tubular column connector 12 and a casing 13. One end of the tubular column connector 12 is connected to the upper delivery tubular column; the casing 13 is detachably connected to the other end of the tubular column connector 12. The tubular column connector 12 and the casing 13 define a sliding cavity 11, and the tubular column connector 12 has a central channel 121, which is communicated with the sliding cavity 11.

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

[0047] Specifically, Figure 3 As shown, in one embodiment, at least one sliding key groove 131 is provided on the inner cavity wall of the sleeve 13, and the at least one sliding key groove 131 is extended along the first direction. At least one vertical bar 212 is provided on the periphery of the printing lead mold assembly 20, and the vertical bar 212 is slidably connected to the sliding key groove 131 in the first direction.

[0048] In the above arrangement, the sliding cooperation between the vertical bar 212 and the sliding key slot 131 can ensure that the printing lead mold assembly 20 slides along the first direction in the sliding cavity 11, thereby ensuring that the telescopic printing lead mold device for horizontal wells can work normally.

[0049] Specifically, Figure 3 As shown, in one embodiment, a plurality of sliding key slots 131 are provided on the inner cavity wall of the sleeve 13, and the plurality of sliding key slots 131 are extended along the first direction, and a plurality of vertical bars 212 are provided on the outer periphery of the printing lead mold assembly 20, and the plurality of vertical bars 212 are slidably connected with the plurality of sliding key slots 131 in a one-to-one correspondence in the first direction. This improves the sliding stability and reliability of the printing lead mold assembly 20.

[0050] Specifically, Figure 3 As shown, 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. Among them, a plurality of vertical bars 212 are arranged on the periphery of the telescopic key 21; a plurality of vertical bars 212 are arranged on the periphery of the telescopic key 21; the rear lead mold 22 is fixed on one end of the telescopic key 21 close to the cavity bottom; the front lead mold 23 is fixed on one end of the telescopic key 21 away from the cavity bottom. The second lead print is printed on the rear lead mold 22, and the first lead print is printed on the front lead mold 23.

[0051] Specifically, Figure 3 As shown, in one embodiment, the printing lead mold assembly 20 also includes an inner shaft 24, one end of which is detachably connected to an 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.

[0052] Specifically, Figure 3 As shown, in one embodiment, a first limiting groove is provided in the front lead mold 23, and a first limiting boss 241 is provided on the outer periphery of the inner shaft 24. The first limiting groove and the first limiting boss 241 are matched with each other to fix the front lead mold 23 on the outer periphery of the inner shaft 24.

[0053] In the above arrangement, a concave-convex matching structure is provided to ensure that the front lead mold 23 can be stably fixed on the outer periphery of the inner shaft 24. This ensures that the telescopic printing lead mold device can work normally.

[0054] Specifically, Figure 3 As shown, in one embodiment, a second limiting boss is provided on one end of the telescopic key 21 close to the bottom of the cavity, and a second limiting groove is provided in the rear lead mold 22. The second limiting groove and the second limiting boss cooperate with each other to fix the rear lead mold 22 on the telescopic key 21.

[0055] In the above arrangement, a concave-convex matching structure is provided, so as to ensure 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.

[0056] Specifically, Figure 3 As shown, in one embodiment, the limiting structure 40 includes a retaining ring 42, and a mounting groove is provided on the end of the sleeve 13 away from the bottom of the cavity. The retaining ring 42 is installed in the mounting groove, and a limiting step 211 is provided on the outer periphery of the telescopic key 21. The retaining ring 42 is used to contact the limiting step 211 to prevent the printing lead mold assembly 20 from escaping from the sliding cavity 11.

[0057] Specifically, Figure 3 As shown, in one embodiment, the stopper sleeve 41 is threadedly connected to one end of the telescopic key 21 away from the cavity bottom.

[0058] Specifically, Figure 3 As shown, in one embodiment, a plurality of pin holes are provided on the outer periphery of the telescopic key 21, a plurality of through holes corresponding to the plurality of pin holes are opened in the sleeve 13, and the telescopic printing lead mold device also includes a starting pin 50, which is passed through the through hole and the pin hole to fix the sleeve 13 on the telescopic key 21.

[0059] Furthermore, the present invention provides a telescopic printing lead mold device for a horizontal well, which includes a pipe column connector 12, a key sleeve (sleeve 13), a steel ball, a rear lead mold 22, a telescopic key 21, a start pin 50, an inner shaft 24, a front lead mold 23, and an axial retaining ring for a hole (retaining ring 42). The right end of the rear lead mold 22 is fixed to the left end of the telescopic key 21, and the rear lead mold 22 cannot rotate on the telescopic key 21. A vertical bar 212 is provided on the outer wall of the telescopic key 21, and a key groove (sliding key groove 131) is provided on the inner wall of the key sleeve. The vertical bar 212 on the outer wall of the telescopic key 21 is matched with the key groove on the inner wall of the key sleeve. The key sleeve and the telescopic key 21 are plugged into one piece. After the key sleeve and the telescopic key 21 are plugged together, the key sleeve and the telescopic key 21 can only move axially relative to each other but cannot rotate relative to each other. An anti-slip mechanism is provided at the right end of the key sleeve, and the anti-slip mechanism can prevent the telescopic key 21 from slipping out of the key sleeve. The right end of the sleeve is out of the way, limiting the travel of the telescopic key 21. The front lead mold 23 is cast on the right end of the inner shaft 24. The front lead mold 23 is fixed on the inner shaft 24. The front lead mold 23 is cast on the left end of the inner shaft 24. The left end of the inner shaft 24 is connected to 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. The steel ball is on the left end surface of the rear lead mold 22. The pipe column connector 12 is connected to the key sleeve. The diameter of the steel ball is larger than the inner diameter of the column connector 12 and the rear lead mold 22. The steel ball can move flexibly between the right end face of the column connector 12 and the left end face of the rear lead mold 22. When the telescopic key 21 moves leftward in the key sleeve, the left end face of the front lead mold 23 will not be limited when the left end face of the rear lead mold 22 and the right end face of the column connector 12 squeeze the steel ball, ensuring that the left end face of the rear lead mold 22 and the right end face of the column connector 12 can squeeze the steel ball. The hole axial retaining ring 42 is installed in the right end hole of the key sleeve. The inner diameter of the hole axial retaining ring is smaller than the outer edge of the telescopic key 21 to prevent the telescopic key 21 from detaching from the key sleeve. A starting pin 50 is installed between the key sleeve and the telescopic key 21, so that the key sleeve and the telescopic key 21 do not move axially during the process of going down the well, preventing the steel ball from being squeezed. When the rear lead mold 22 encounters resistance during the process of going down the well, the starting pin 50 is sheared off when the rear pipe string applies an axial force of 20KN, and the key sleeve and the telescopic key 21 can move axially. A boss is set on the inner shaft 24 to fix the front lead mold 23 and prevent the front lead mold 23 from falling off.

[0060] When there are falling objects, deformation, and shrinkage in the horizontal section of the horizontal well, after the present invention is in the above-mentioned well section, the steel ball is at the bottom under the action of its own weight. At this time, the front lead mold 23 encounters resistance, and the thrust is greater than 20KN. The start pin 50 is sheared off, and the situation of the wellbore is printed on the front lead mold 23, and lead printing is achieved. At the same time, the steel ball is squeezed and leaves a mark on the left side of the rear lead mold 22. When the telescopic printing lead mold device is lifted to the ground, the mark left on the left side of the rear lead mold 22 can be used as a reference point to find out what position in the wellbore the mark left on the front lead mold 23 when the lead printing is made.

[0061] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention 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 lead printing mold device for horizontal wells, characterized in that: include: A connecting tube assembly (10), one end of which is connected to the upper delivery pipe column, and the other end of the connecting tube assembly (10) is provided with a sliding cavity (11); as well as A printing lead mold assembly (20) is telescopically arranged in the sliding cavity (11) along a first direction; and An extrusion member (30) is movably disposed in the sliding cavity (11) and is located between the printing lead mold assembly (20) and the bottom of the sliding cavity (11); a limiting structure (40), arranged between the connecting tube assembly (10) and the printing lead mold assembly (20), and used to prevent the printing lead mold assembly (20) from falling out of the sliding cavity (11); When the telescopic printing lead mold device encounters resistance in the horizontal well, the end of the printing lead mold assembly (20) away from the cavity bottom contacts the resistance point in the well, and the upper delivery pipe string applies a thrust to the telescopic printing lead mold device, so that the end of the printing lead mold assembly (20) away from the cavity bottom is deformed by force and forms a first lead print. At the same time, the printing lead mold assembly (20) slides along the first direction toward the cavity bottom of the sliding cavity (11) to extrude the extrusion member (30), so that the end of the printing lead mold assembly (20) close to the cavity bottom is deformed by force and forms a second lead print.

2. The telescopic printing lead mold device for horizontal wells according to claim 1, characterized in that: The connecting cylinder assembly (10) comprises: A pipe column connector (12), one end of which is connected to the upper delivery pipe column; and A casing (13) detachably connected to the other end of the pipe column connector (12); The tubular column connector (12) and the sleeve (13) define the sliding cavity (11), and the tubular column connector (12) has a central channel (121), and the central channel (121) is connected to the sliding cavity (11).

3. The telescopic printing lead mold device for horizontal wells according to claim 2 is characterized in that: At least one sliding keyway (131) is provided on the inner cavity wall of the sleeve (13), and the at least one sliding keyway (131) is extended along a first direction. At least one vertical bar (212) is provided on the outer periphery of the printing lead mold assembly (20), and the vertical bar is slidably connected to the sliding keyway (131) in the first direction.

4. The telescopic printing lead mold device for horizontal wells according to claim 3 is characterized in that: The printing lead mold assembly (20) comprises: A telescopic key (21), the outer periphery of which is provided with at least one vertical bar; and A rear lead mold (22) is fixed to one end of the telescopic key (21) close to the cavity bottom; and A front lead mold (23) is fixed on an end of the telescopic key (21) away from the cavity bottom; The second lead print is stamped on the rear lead mold (22), and the first lead print is stamped on the front lead mold (23).

5. The telescopic printing lead mold device for horizontal wells according to claim 4 is characterized in that: The printing lead mold assembly (20) further comprises an inner shaft (24), one end of which is detachably connected to an 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).

6. The telescopic printing lead mold device for horizontal wells according to claim 5, characterized in that: A first limiting groove is arranged in the front lead mold (23), and a first limiting boss (241) is arranged on the outer periphery of the inner shaft (24). The first limiting groove and the first limiting boss are matched in a concave-convex manner to fix the front lead mold (23) on the outer periphery of the inner shaft (24).

7. The telescopic printing lead mold device for horizontal wells according to claim 4, characterized in that: A second limiting boss is arranged on one end of the telescopic key (21) close to the cavity bottom, and a second limiting groove is arranged in the rear lead mold (22). The second limiting groove and the second limiting boss are matched in a concave-convex manner to fix the rear lead mold (22) on the telescopic key (21).

8. The telescopic printing lead mold device for horizontal wells according to claim 4, characterized in that: The limiting structure (40) comprises a stopper sleeve (41), which is detachably connected to an end of the telescopic key (21) away from the cavity bottom and partially extends into the telescopic key (21). A limiting step (211) is provided on the outer periphery of the telescopic key (21), and the portion of the stopper sleeve (41) extending into the telescopic key (21) is used to contact the limiting step (211) to prevent the printing lead mold assembly (20) from falling out of the sliding cavity (11).

9. The telescopic printing lead mold device for horizontal wells according to claim 4, characterized in that: The limiting structure (40) comprises a retaining ring (42), an end of the sleeve (13) away from the cavity bottom is provided with a mounting groove, the retaining ring (42) is installed in the mounting groove, a limiting step (211) is provided on the outer periphery of the telescopic key (21), and the retaining ring (42) is used to contact with the limiting step (211) to prevent the printing lead mold assembly (20) from falling out of the sliding cavity (11).

10. The telescopic printing lead mold device for horizontal wells according to claim 4, characterized in that: The outer periphery of the telescopic key (21) is provided with a pin hole, the sleeve (13) is provided with a through hole corresponding to the pin hole, and the telescopic printing lead mold device also includes a starting pin (50), the starting pin (50) is passed through the through hole and the pin hole to fix the sleeve (13) on the telescopic key (21).

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