Pumping perforation collar

Abstract

The application discloses a pumping perforation horse collar and relates to the technical field of well logging perforation. The application aims to solve the problem that the horse collar of the double tension rod is easy to cause damage to the cable after being stuck and broken. The application comprises a shell, an upper connecting piece and a lower connecting piece are arranged in the shell, a piston is arranged on the upper connecting piece, a first tension rod is connected to the bottom end of the upper connecting piece, the bottom end of the first tension rod is connected with the lower connecting piece, a second tension rod is further sleeved in the first tension rod, the top end and the bottom end of the second tension rod are connected with the upper connecting piece and the lower connecting piece respectively, a release mechanism is further arranged on the upper connecting piece, and two compression cavities and a control cavity are arranged in the upper connecting piece and correspond to the release mechanism.

Description

Technical Field

[0001] This invention relates to the technical field of well logging perforation, and specifically to a pumping perforation bridle. Background Technology

[0002] A logging bridle is a cable connector that connects the logging winch cable box to the logging instruments. Various data measured by the logging instruments are transmitted through the bridle to the cable, and then from the cable to the instruments at the wellhead, thereby completing the measurement and perforation work.

[0003] Most commonly used hydraulic bridles consist of a connecting sleeve, upper and lower connectors, and a housing. The two connectors are linked by a tension rod. If the bridle jams, a large force needs to be applied to the cable to break the tension rod. However, most bridles currently only have one tension rod. Due to the complex downhole environment and the increasing fluid pressure as the bridle extends deeper into the well, the tension rod is prone to metal fatigue and breakage after repeated use, leading to the instrument falling out and severely affecting logging and perforation work, causing unnecessary economic losses. Existing technology has designed a dual-tension-rod hydraulic cylinder bridle to solve the above problems, such as the Chinese patent with publication number CN202882887U. This design uses one tension rod to apply force initially. When the latter breaks due to metal fatigue, the other tension rod takes over, continuing the work and preventing the instrument from falling into the well.

[0004] However, the technical solution in the aforementioned patent has a significant technical problem: the bridle is prone to jamming during operation. In order to successfully retrieve the cable, the tension rods need to be broken. For a double tension rod structure, this would undoubtedly require a greater pulling force to break both rods. Consequently, the force applied to the cable would be greater, which could damage the cable, affect its service life, and cause safety hazards and economic losses. There is also the possibility of the cable breaking unexpectedly, which would create significant difficulties for subsequent retrieval operations. Summary of the Invention

[0005] To address the aforementioned problem—namely, the issue of double-pull-bar bridles easily breaking and damaging cables after jamming—this invention proposes a pumping nozzle bridle, comprising a housing, within which are an upper connector and a lower connector. A piston is mounted on the upper connector, and a first pull bar is connected to the bottom end of the upper connector. The bottom end of the first pull bar is connected to the lower connector. A second pull bar is also sleeved inside the first pull bar, with its top and bottom ends connected to the upper and lower connectors, respectively. A release mechanism is also provided on the upper connector, with two corresponding release mechanisms located within the upper connector. The system includes a compression chamber and a control chamber, with the two compression chambers symmetrically arranged about the control chamber. The release mechanism includes two locking blocks, which are slidably connected within the two compression chambers. A spring is also provided within each compression chamber, with one end of the spring abutting against a locking block and the other end abutting against the compression chamber. A groove is provided on the inner surface of the first tension rod corresponding to the locking block for engaging with the corresponding locking block. A stop is provided at the top of the second tension rod, positioned above the locking block. An electromagnet is provided within the control chamber to attract the locking block and allow it to slide towards the control chamber.

[0006] A further provision of the present invention is that: two sets of the release mechanism are provided, and the two sets of the release mechanism are symmetrically arranged about the second tension bar.

[0007] A further configuration of the present invention is as follows: a shaft hole is provided between the control cavity and the compression cavity, the diameter of the shaft hole being smaller than the width of the compression cavity; a guide shaft is provided at one end of the locking block near the control cavity; a spring is sleeved on the guide shaft; the guide shaft passes through the shaft hole and extends into the control cavity; a magnetic baffle is connected to one end of the guide shaft located in the control cavity, the width of the magnetic baffle being larger than the shaft hole.

[0008] A further configuration of the present invention is as follows: the electromagnet is disposed in the middle position of the control cavity, and the two magnetic baffles are respectively disposed on both sides of the electromagnet.

[0009] A further provision of the present invention is that: a one-way locking mechanism is also provided in the upper connecting member, the one-way locking mechanism is located above the release mechanism, and the distance between the one-way locking mechanism and the release mechanism is the same as the width of the stop block, the stop block is located above the one-way locking mechanism; the one-way locking mechanism includes a push block, one end of the push block near the second tension bar is set as an inclined surface, and the inclined surface is set upwards, a sliding cavity is opened in the upper connecting member corresponding to the push block, the push block is slidably connected in the sliding cavity, and its inclined surface extends out of the sliding cavity, the spring is also installed in the sliding cavity, one end of the spring abuts against the push block, and the other end abuts against the sliding cavity.

[0010] A further configuration of the present invention is as follows: the end of the push block away from the second tension bar is also connected to an optical axis, the spring is sleeved on the optical axis, and a limiting cavity is also formed on the upper connecting member corresponding to the optical axis. The end of the optical axis away from the push block extends into the limiting cavity and is connected to a limiting block.

[0011] A further provision of the present invention is that two sets of the one-way locking mechanism are provided, and the two sets of the one-way locking mechanism are symmetrically arranged about the second tension bar.

[0012] The beneficial effects of this invention are as follows:

[0013] 1. By setting a release mechanism, the first and second tension bars can be released simultaneously. Therefore, if the bridle gets stuck, simply energizing the electromagnet will disconnect the upper connector from the first and second tension bars, avoiding excessive load on the cable and further protecting the cable from damage.

[0014] 2. By setting the stop block above the locking block, it is possible to achieve the following when both the first and second tension bars are intact: the first tension bar is under force while the second tension bar is not under force. Even if the first tension bar breaks, the upper and lower connecting parts can still be connected together by the second tension bar. Thus, even if the first tension bar breaks, the bridle can still be pulled out of the inlet by the second tension bar.

[0015] 3. By setting a one-way locking mechanism, after the second tension bar is subjected to force, the stop block can be locked between the locking block and the push block, so that the bridle can continue to work. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the present invention is shown.

[0017] Figure 2 It shows Figure 1A magnified view of a portion of point A in the middle.

[0018] Figure 3 A schematic diagram of the structure when the second tension bar is under force is shown.

[0019] Figure 4 It shows Figure 3 A magnified view of a section at point B.

[0020] Reference numerals: 1. Outer shell; 11. Upper connector; 111. Piston; 112. Release mechanism; 1121. Locking block; 1122. Guide shaft; 1123. Magnetic baffle; 113. Control cavity; 114. Compression cavity; 115. Electromagnet; 116. Sliding cavity; 117. One-way locking mechanism; 1171. Push block; 1172. Optical axis; 1173. Limiting block; 118. Limiting cavity; 119. Spring; 12. Lower connector; 13. First tension bar; 14. Second tension bar; 141. Stop block. Detailed Implementation

[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] refer to Figure 1 , Figure 2 The present invention proposes a pumping perforated bridle, including a housing 1. An upper connector 11 and a lower connector 12 are installed inside the housing 1. A piston 111 is installed on the upper connector 11. The piston 111 is disposed inside the housing 1 to balance the internal and external pressure of the bridle. The top end of the upper connector 11 extends out of the housing 1 and is fixedly connected to a sealing joint for connecting a cable.

[0023] The bottom end of the upper connector 11 is coaxially fitted with a first tension rod 13, and the bottom end of the first tension rod 13 is threadedly fixedly connected to the lower connector 12. The inside of the first tension rod 13 is also coaxially fitted with a second tension rod 14, the top end of the second tension rod 14 is connected to the upper connector 11, and the bottom end of the second tension rod 14 is threadedly fixedly connected to the lower connector 12.

[0024] The upper connector 11 is also provided with a release mechanism 112. The release mechanism 112 is used to engage the first tension bar 13 and the second tension bar 14. At the same time, when release is required, it can also release the first tension bar 13 and the second tension bar 14, so that the cable is detached from the bridle. Two sets of release mechanisms 112 are provided, and the two sets of release mechanisms 112 are symmetrically arranged about the second tension bar 14.

[0025] The upper connector 11 has two compression chambers 114 and a control chamber 113 corresponding to the release mechanism 112. The two compression chambers 114 are symmetrically arranged about the control chamber 113. The release mechanism 112 includes two locking blocks 1121, which are slidably connected to the two compression chambers 114 respectively. The end of the locking block 1121 facing away from the compression chamber 114 can extend out of the compression chamber 114. It should be noted that the upper connector 11 is hollow, and one of the locking blocks 1121 can extend into the hollow interior of the upper connector 11. The top end of the second tension rod 14 also extends into the hollow interior of the upper connector 11.

[0026] The inner wall of the first tension rod 13 has a corresponding slot for the locking block. During installation, the top end of the first tension rod 13 is first fitted onto the bottom end of the upper connecting member 11, and then the two outwardly protruding locking blocks 1121 are engaged with the slot, thereby limiting the axial movement and rotation of the first tension rod 13. The top end of the second tension rod 14 is fixedly connected to a stop block 141. The diameter of the stop block 141 is the same as the hollow diameter of the upper connecting member 11. The stop block 141 is positioned above the locking blocks 1121. That is, when the slot is engaged with the two outwardly protruding locking blocks 1121, the first tension rod 13 and the upper connecting member 11 remain relatively fixed, while the stop block 141 is located above the locking blocks 1121 and does not contact the inwardly protruding locking blocks 1121. At this time, the first tension rod 13 is under stress, and the second tension rod 14 is not under stress.

[0027] A shaft hole is provided between the control cavity 113 and the compression cavity 114 to allow the control cavity 113 and the compression cavity 114 to communicate. The diameter of the shaft hole is smaller than the width of the compression cavity 114. A guide shaft 1122 is fixedly connected to one end of the locking block 1121 near the control cavity 113. A spring 119 is coaxially sleeved on the guide shaft 1122. One end of the spring 119 abuts against the locking block 1121, and the other end of the spring 119 abuts against the compression cavity 114. That is, when the locking block 1121 is squeezed, the locking block 1121 moves toward the inside of the compression cavity 114. At this time, the locking block 1121 will compress the spring 119 and contract. When the locking block 1121 is released, the locking block 1121 will slide toward the outside of the compression cavity 114 under the action of the elastic force of the spring 119.

[0028] One end of the guide shaft 1122, away from the locking block 1121, passes through the shaft hole and into the control cavity 113. A magnetic baffle 1123 is fixedly connected to the end of the guide shaft 1122 extending into the control cavity 113. The width of the magnetic baffle 1123 is greater than the diameter of the shaft hole, thus limiting the circumferential movement of the locking block 1121. An electromagnet 115 is also fixedly installed in the middle of the control cavity 113. The electromagnet 115 is electrically connected to a power source via a cable. When the electromagnet 115 is energized, it generates a magnetic force that attracts the magnetic baffle 1123 towards the electromagnet 115. The resulting magnetic force is greater than the elastic force of the spring 119, causing the locking block 1121 to retract into the compression cavity 114.

[0029] It should be noted that the two magnetic baffles 1123 are respectively set on both sides of the electromagnet 115. When the electromagnet 115 is energized, it can simultaneously drive the two locking blocks 1121 to slide into the compression chamber 114. That is, both the outward-extending locking block 1121 and the inward-extending locking block 1121 will be retracted into the compression chamber 114.

[0030] Release process: When the bridle gets stuck at the bottom of the well and the cable needs to be retracted, the electromagnet 115 can be energized to generate magnetic force to retract the locking block 1121 back into the compression chamber 114. Both the outward and inward extending locking blocks 1121 can be retracted, thereby causing the first tension bar 13 and the second tension bar 14 to disengage from the upper connector 11. Pulling the cable upward will disengage the cable from the bridle, eliminating the need to apply force to the cable and further protecting the cable from damage.

[0031] A one-way locking mechanism 117 is also installed on the upper connector 11. The one-way locking mechanism 117 is located above the release mechanism 112, and the distance between the one-way locking mechanism 117 and the release mechanism 112 is the same as the width of the stop block 141. The stop block 141 is located above the one-way locking mechanism 117. The one-way locking mechanism 117 includes a push block 1171. The end of the push block 1171 near the second tension bar 14 is set as an inclined surface, and the inclined surface is set upward. A sliding cavity 116 is opened in the upper connector 11 corresponding to the push block 1171. The push block 1171 is slidably connected in the sliding cavity 116, and the end of the push block 1171 with the inclined surface extends out of the sliding cavity 116 and is set in the hollow of the upper connector 11.

[0032] A spring 119 is also installed inside the sliding cavity 116. One end of the spring 119 abuts against the sliding cavity 116, and the other end of the spring 119 abuts against the push block 1171. That is, when the push block 1171 is pressed and slids into the sliding cavity 116, the push block 1171 will compress the spring 119. The end of the push block 1171 away from the second tension bar 14 is also fixedly connected to an optical shaft 1172. The spring 119 is coaxially sleeved on the optical shaft 1172. A limiting cavity 118 is also opened on the upper connecting member 11 corresponding to the optical shaft 1172. The end of the optical shaft 1172 away from the push block 1171 extends into the limiting cavity 118. A limiting block 1173 is also fixedly connected to the end of the optical shaft 1172 that extends into the limiting cavity 118 to limit the sliding process of the push block 1171.

[0033] Two sets of one-way locking mechanisms 117 are also provided, and the two sets of one-way locking mechanisms 117 are symmetrically arranged about the second tension bar 14.

[0034] refer to Figure 3 , Figure 4 When the first tension bar 13 breaks due to fatigue, under the force between the upper connector 11 and the lower connector 12, the stop 141 of the second tension bar 14 will abut against the inclined surface of the push block 1171, thereby squeezing the push block 1171 into the sliding cavity 116. At this time, the spring 119 is compressed. When the stop 141 completely passes the push block 1171, the push block 1171 will immediately return to its original position under the elastic force of the spring 119. That is, at this time, the stop 141 will be fixed between the push block 1171 and the locking block 1121. The connection between the upper connector 11 and the lower connector 12 is achieved by the second tension bar 14. The second tension bar 14 begins to bear force, which prevents the bridle and instruments from falling into the well after the first tension bar 13 breaks.

[0035] In summary, by setting the release mechanism 112, the present invention can simultaneously release the first tension bar 13 and the second tension bar 14. Thus, when the bridle jams, only the electromagnet 115 needs to be energized to disconnect the upper connector 11 from the first tension bar 13 and the second tension bar 14, avoiding the problem of the cable bearing too much force and further protecting the cable from damage.

[0036] By placing the stop 141 above the locking block 1121, it is possible to achieve the following when both the first tension bar 13 and the second tension bar 14 are intact: the first tension bar 13 is subjected to force while the second tension bar 14 is not subjected to force. Even if the first tension bar 13 breaks, the upper connecting member 11 and the lower connecting member 12 can still be connected together through the second tension bar 14. Thus, even if the first tension bar 13 breaks, the bridle can still be pulled out of the inlet through the second tension bar 14.

[0037] By setting a one-way locking mechanism 117, after the second tension bar 14 is subjected to force, the stop block 141 can be locked between the locking block 1121 and the push block 1171, thereby enabling the bridle to continue to work.

[0038] Although the invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0039] In the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0042] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A pumping nozzle bridle, comprising a housing (1), wherein an upper connector (11) and a lower connector (12) are disposed within the housing (1), a piston (111) is mounted on the upper connector (11), a first tension rod (13) is connected to the bottom end of the upper connector (11), the bottom end of the first tension rod (13) is connected to the lower connector (12), a second tension rod (14) is also sleeved inside the first tension rod (13), the top end and bottom end of the second tension rod (14) are respectively connected to the upper connector (11) and the lower connector (12), characterized in that: The upper connector (11) is also provided with a release mechanism (112). The upper connector (11) has two compression chambers (114) and a control chamber (113) corresponding to the release mechanism (112). The two compression chambers (114) are symmetrically arranged about the control chamber (113). The release mechanism (112) includes two locking blocks (1121). The two locking blocks (1121) are slidably connected in the two compression chambers (114). A spring (119) is also provided in the compression chamber (114). One end of the spring (119) is connected to the locking block (1121). The first tension bar (13) abuts against the locking block (1121) at one end and against the compression chamber (114) at the other end. A slot is provided on the inner surface of the first tension bar (13) corresponding to the locking block (1121) for engaging with the corresponding locking block (1121). A stop block (141) is provided at the top of the second tension bar (14), positioned above the locking block (1121). An electromagnet (115) is provided inside the control chamber (113) to attract the locking block (1121) and allow it to slide towards the control chamber (113). The upper connecting member... (11) is also provided with a one-way locking mechanism (117), which is located above the release mechanism (112). The distance between the one-way locking mechanism (117) and the release mechanism (112) is the same as the width of the stop block (141). The stop block (141) is located above the one-way locking mechanism (117). The one-way locking mechanism (117) includes a push block (1171). The end of the push block (1171) near the second tension bar (14) is set as an inclined surface, and the inclined surface is set upward. The upper connector (11) has a sliding cavity (116) corresponding to the push block (1171). The push block (1171) is slidably connected in the sliding cavity (116), and its inclined surface extends out of the sliding cavity (116). The spring (119) is also installed in the sliding cavity (116). One end of the spring (119) abuts against the push block (1171), and the other end abuts against the sliding cavity (116). Two sets of one-way locking mechanisms (117) are provided, and the two sets of one-way locking mechanisms (117) are symmetrically arranged about the second tension bar (14).

2. The pumping perforation bridle according to claim 1, characterized in that: Two sets of the release mechanism (112) are provided, and the two sets of the release mechanism (112) are symmetrically arranged about the second tension bar (14).

3. The pumping perforation bridle according to claim 1, characterized in that: A shaft hole is provided between the control cavity (113) and the compression cavity (114), and the diameter of the shaft hole is smaller than the width of the compression cavity (114). A guide shaft (1122) is provided at one end of the locking block (1121) near the control cavity (113). The spring (119) is sleeved on the guide shaft (1122). The guide shaft (1122) passes through the shaft hole and extends into the control cavity (113). A magnetic baffle (1123) is connected to one end of the guide shaft (1122) in the control cavity (113). The width of the magnetic baffle (1123) is larger than the shaft hole.

4. The pumping perforation bridle according to claim 3, characterized in that: The electromagnet (115) is located in the middle of the control cavity (113), and the two magnetic baffles (1123) are respectively located on both sides of the electromagnet (115).

5. The pumping perforation bridle according to claim 1, characterized in that: The push block (1171) is connected to an optical axis (1172) at one end away from the second tension bar (14). The spring (119) is sleeved on the optical axis (1172). A limiting cavity (118) is also opened on the upper connector (11) corresponding to the optical axis (1172). The end of the optical axis (1172) away from the push block (1171) extends into the limiting cavity (118) and is connected to a limiting block (1173).

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