Quick connecting device for instruments in near-bit screw

Abstract

The utility model discloses a quick connecting device for an instrument in a near-bit screw, which relates to the technical field of marine drilling equipment and comprises an inserting male head, a positioning sleeve, an elastic component and an inserting female head, a first end of the inserting male head is used for being connected with a near-bit measuring connector, and a second end of the inserting male head is provided with a first inserting hole; a first insertion hole is formed in the positioning sleeve, an insertion head is arranged in the first insertion hole, a first end of the positioning sleeve is inserted into the first insertion hole, a first end of the insertion female head is used for being connected with an instrument string in a screw rod, a second insertion hole is formed in a second end of the insertion female head, and when the insertion male head is inserted into the insertion female head, the insertion head of the insertion male head is inserted into the second insertion hole of the insertion female head. The second end of the insertion female head is inserted into the positioning sleeve and abuts against the transmission spring in the second insertion hole so that the near-bit measuring connector and the instrument string in the screw can conduct signal and electric energy transmission, and the second end of the insertion female head is inserted into the positioning sleeve and abuts against the elastic assembly in the insertion male head so that the pin shaft of the insertion female head can be clamped into the anti-disengaging groove of the positioning sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of marine drilling equipment, in particular to an instrument quick connection device in a screw rod near a drill bit. Background Art

[0002] Using the conventional near-bit measurement while drilling method, during the operation, the actual geological characteristics of the well can be used to determine and control the wellbore trajectory, and the downhole drilling tool can be accurately controlled to hit the target layer. This method overcomes the disadvantage of not being able to accurately measure the formation data information at the drill bit location in real time.

[0003] There are two types of conventional near-drill bit instrument signal transmission. One is through wireless transmission to the receiving device. However, during deep-sea open drilling, the wireless transmission distance is too short to meet the demand. The other is wired transmission. A hollow screw is trial-produced to pass the near-drill bit instruments and lines through the inside of the hollow screw, thereby completing wired transmission.

[0004] For the assembly of near-drill-bit instruments using the above-mentioned wired transmission, the current method is to first connect the instrument string in the screw with the near-drill-bit measuring joint, then lift the near-drill-bit measuring joint and the instrument string in the screw, insert the instrument string in the screw into the hollow screw, and then connect the near-drill-bit measuring joint and the hollow screw through threads.

[0005] However, the current assembly process of this line-through-screw connection method is relatively complicated. Since the near-drill-bit measuring joint is heavy, it is difficult to lift it manually. At the same time, if there is an offset during the insertion process, it may cause the instrument string in the screw to break, which is prone to errors in the offshore installation operation environment and cause damage to the instrument. If the assembly is completed in advance, the battery power will be consumed when not in operation, and the working time during formal operation cannot be guaranteed. Utility Model Content

[0006] The purpose of the utility model is to provide a quick connection device for instruments in a near-drill bit screw to solve the problems existing in the above-mentioned related technologies. When assembling a near-drill bit instrument, the near-drill bit measuring joint can be connected to the hollow screw first, and then the instrument string in the screw can be inserted into the hollow screw, and connected to the near-drill bit measuring joint through the device, which is easy to operate and reduces the risk of instrument damage. In addition, the connection between the near-drill bit measuring joint and the instrument string in the screw can be quickly completed before the operation is required, so as to realize signal and electric energy transmission, prevent premature loss of electric energy, and save costs.

[0007] To achieve the above purpose, the utility model provides the following solutions:

[0008] The utility model provides a quick connection device for a near-bit screw inner instrument, which includes an insertion male head, a positioning sleeve, an elastic component and an insertion female head. The first end of the insertion male head is used to connect with a near-bit measurement joint. The second end of the insertion male head is provided with a first jack, and an insertion head is arranged in the first jack. The first end of the positioning sleeve is inserted into the first jack, and a cavity is formed between the first end of the positioning sleeve and the bottom of the first jack. The elastic component is arranged in the cavity, and the second end of the positioning sleeve is provided with an anti-disengagement groove. The first end of the insertion female head is used to connect with a screw inner instrument string. The second end of the insertion female head is provided with a second jack, a transmission spring is arranged in the second jack, and a pin shaft is arranged on the second end of the insertion female head. When the insertion male head is inserted into the insertion female head, the insertion head of the insertion male head is inserted into the second jack of the insertion female head and abuts against the transmission spring, so as to enable signal and electric energy transmission between the near-bit measurement joint and the screw inner instrument string. Moreover, the second end of the insertion female head is inserted into the positioning sleeve and abuts against the elastic component in the insertion male head, so that the pin shaft of the insertion female head is clamped in the anti-disengagement groove of the positioning sleeve.

[0009] Preferably, the elastic component includes a spring. The spring is sleeved on the insertion head of the insertion male head and is located between the bottom of the first jack and the first end of the positioning sleeve.

[0010] Preferably, the elastic component further includes a gasket. The gasket is sleeved on the insertion head of the insertion male head and is located between the spring and the first end of the positioning sleeve.

[0011] Preferably, the insertion male head, the insertion head and the insertion female head are all of a cylindrical structure. The first jack of the insertion male head and the second jack of the insertion female head are both circular holes. The insertion head is coaxially fixed in the first jack of the insertion male head. The positioning sleeve is of a cylindrical structure.

[0012] Preferably, the first end of the positioning sleeve is threadedly connected to the first jack of the insertion male head.

[0013] Preferably, the anti-disengagement groove is an L-shaped groove. The L-shaped groove includes a long vertical groove, a horizontal groove and a short vertical groove which are sequentially communicated. The long vertical groove extends along the direction from the first end to the second end of the positioning sleeve and penetrates through the end of the second end of the positioning sleeve, so that the pin shaft on the insertion female head can be inserted into the long vertical groove. When the second end of the insertion female head presses the elastic component in the insertion male head, the pin shaft can move along the long vertical groove to the horizontal groove. And when the insertion female head is rotated, the pin shaft can move along the horizontal groove to the short vertical groove and can be clamped with the short vertical groove.

[0014] Preferably, at least two L-shaped grooves are provided, and the two L-shaped grooves are evenly distributed at the second end of the positioning sleeve; at least two pin shafts are provided, and the pin shafts are arranged in one-to-one correspondence with the L-shaped grooves.

[0015] Preferably, the transmission spring includes a plurality of spring pieces, and all the spring pieces are evenly distributed on the side wall of the second jack of the insertion female head.

[0016] The utility model has achieved the following technical effects compared with the related technology:

[0017] The quick connection device for the downhole motor inner instrument provided by the utility model includes an insertion male head, a positioning sleeve, an elastic component and an insertion female head. When assembling the downhole instrument, first connect the first end of the insertion male head with the downhole measurement joint, install the elastic component in the insertion male head, connect the positioning sleeve with the second end of the insertion male head, then connect the first end of the insertion female head with the inner instrument string of the screw rod. Then, first connect the downhole measurement joint with the hollow screw rod, then insert the inner instrument string of the screw rod into the hollow screw rod, and connect it with the insertion male head on the downhole measurement joint through the insertion female head, so that the insertion head of the insertion male head is inserted into the second jack of the insertion female head and abuts against the transmission spring in the second jack, realizing the signal and electric energy transmission between the downhole measurement joint and the inner instrument string of the screw rod. At the same time, by inserting the second end of the insertion female head into the positioning sleeve and abutting against the elastic component in the insertion male head, the pin shaft of the insertion female head is clamped in the anti-disengagement groove of the positioning sleeve, and the connection between the downhole measurement joint and the inner instrument string of the screw rod can be completed.

[0018] Since the method of using this device for assembling the downhole instrument is to first connect the downhole measurement joint with the hollow screw rod in advance, and then connect the inner instrument string of the screw rod with the downhole measurement joint. Compared with the traditional method, only the inner instrument string of the screw rod needs to be inserted into the hollow screw rod and then connected with the downhole measurement joint through this device, instead of inserting the inner instrument string of the screw rod connected with the downhole measurement joint (which is heavy and difficult to lift manually) into the hollow screw rod, which is convenient for operation, reduces the risk of instrument damage, and can quickly complete the connection between the downhole measurement joint and the inner instrument string of the screw rod before operation, realize signal and electric energy transmission, prevent premature power loss, and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the related technology, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic diagram of a quick connection device for an in-bit screw drill tool provided by an embodiment of the present invention;

[0021] Figure 2 Cross-sectional view of a quick connection device for an in-bit screw drill tool provided by an embodiment of the present invention;

[0022] Figure 3 Cross-sectional view of a male insertion head provided by an embodiment of the present invention;

[0023] Figure 4 Cross-sectional view of a female insertion head provided by an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the installation position of a quick connection device for an in-bit screw drill tool provided by an embodiment of the present invention.

[0025] In the figure: 01 - near-bit measurement joint, 02 - in-screw tool string, 1 - male insertion head, 2 - positioning sleeve, 3 - female insertion head, 4 - insertion head, 5 - anti-disengagement groove, 6 - transmission spring, 7 - pin shaft, 8 - spring, 9 - gasket. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] The purpose of the present invention is to provide a quick connection device for an in-bit screw drill tool to solve the problems existing in the related technologies. When assembling the in-bit instrument, the near-bit measurement joint can be first connected to the hollow screw drill, and then the in-screw tool string can be inserted into the hollow screw drill and connected to the near-bit measurement joint through this device, which is convenient for operation, reduces the risk of instrument damage, and can quickly complete the connection between the near-bit measurement joint and the in-screw tool string before the operation is required, realizing signal and power transmission, preventing premature power loss, and saving costs.

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0029] As Figures 1-4 shown, this embodiment provides a quick connection device for an in-bit screw drill tool, including a male insertion head 1, a positioning sleeve 2, an elastic component, and a female insertion head 3. The first end of the male insertion head 1 (i.e., Figure 3The left end of the male insert 1 (inserted into the middle) is used to connect with the near-bit measurement sub 01, and the second end of the male insert 1 (i.e., Figure 3 the right end of the male insert 1 inserted into the middle) is provided with a first jack, and an insertion head 4 is arranged in the first jack; the first end of the positioning sleeve 2 (i.e., Figure 2 the left end of the positioning sleeve 2 in the middle) is inserted into the first jack and forms a cavity with the bottom of the first jack, and the elastic component is arranged in the cavity. The second end of the positioning sleeve 2 (i.e., Figure 2 the right end of the positioning sleeve 2 in the middle) is provided with an anti-disengagement groove 5; the first end of the female insert 3 (i.e., Figure 4 the right end of the female insert 3 in the middle) is used to connect with the downhole tool string 02 in the screw rod, and the second end of the female insert 3 (i.e., Figure 4 the left end of the female insert 3 in the middle) is provided with a second jack, and a transmission spring 6 is arranged in the second jack, and a pin shaft 7 is arranged on the second end of the female insert 3; when the male insert 1 is inserted into the female insert 3, the insertion head 4 of the male insert 1 is inserted into the second jack of the female insert 3 and abuts against the transmission spring 6, so that the near-bit measurement sub 01 and the downhole tool string 02 in the screw rod can perform signal and power transmission, and the second end of the female insert 3 is inserted into the positioning sleeve 2 and abuts against the elastic component in the male insert 1, so that the pin shaft 7 of the female insert 3 is clamped in the anti-disengagement groove 5 of the positioning sleeve 2.

[0030] In this embodiment, the elastic component includes a spring 8, and the spring 8 is sleeved on the insertion head 4 of the male insert 1 and is located between the bottom of the first jack and the first end of the positioning sleeve 2.

[0031] Further, the elastic component further includes a gasket 9, and the gasket 9 is sleeved on the insertion head 4 of the male insert 1 and is located between the spring 8 and the first end of the positioning sleeve 2.

[0032] In this embodiment, the male insert 1, the insertion head 4, and the female insert 3 are all cylindrical structures. The first jack of the male insert 1 and the second jack of the female insert 3 are both circular holes, and the insertion head 4 is coaxially fixed in the first jack of the male insert 1; the positioning sleeve 2 is a cylindrical structure.

[0033] In this embodiment, the first end of the positioning sleeve 2 is threadedly connected to the first jack of the male insert 1.

[0034] In this embodiment, the anti-disengagement groove 5 is an L-shaped groove. The L-shaped groove includes a long vertical groove, a horizontal groove, and a short vertical groove that are connected in sequence. The long vertical groove extends along the direction from the first end to the second end of the positioning sleeve 2 and penetrates through the end of the second end of the positioning sleeve 2, so that the pin shaft 7 on the female insert 3 can be inserted into the long vertical groove; when the second end of the female insert 3 presses the elastic component in the male insert 1, the pin shaft 7 can move along the long vertical groove to the horizontal groove, and when the female insert 3 is rotated, the pin shaft 7 can move along the horizontal groove to the short vertical groove and can be clamped with the short vertical groove.

[0035] Furthermore, there are at least two L-shaped grooves, which are evenly distributed at the second end of the positioning sleeve 2; there are at least two pin shafts 7, and the pin shafts 7 are arranged in one-to-one correspondence with the L-shaped grooves.

[0036] In this embodiment, the transmission spring 6 includes a plurality of spring pieces, and all the spring pieces are evenly distributed on the side wall of the second jack of the female insert 3.

[0037] The use process of the near-bit screw-in tool quick connection device provided in this embodiment is as follows:

[0038] When assembling the near-bit tool, first connect the first end of the male insert 1 with the near-bit measurement joint 01, sleeved the spring 8 and the gasket 9 on the insertion head 4 of the male insert 1, and threadedly connect the positioning sleeve 2 with the second end of the male insert 1. Then, connect the first end of the female insert 3 with the screw-in tool string 02. Next, first connect the near-bit measurement joint 01 with the hollow screw, and then insert the screw-in tool string 02 into the hollow screw, so that the pin shaft 7 on the female insert 3 enters the anti-disengagement groove 5 on the positioning sleeve 2. Continue to insert the screw-in tool string 02 inward, so that the second end of the female insert 3 squeezes the spring 8 inside the male insert 1 until the spring 8 stops contracting. Then, rotate the screw-in tool string 02 together with the female insert 3 until it cannot be rotated. After relaxation, the spring 8 rebounds, so that the pin shaft 7 on the female insert 3 is clamped in the anti-disengagement groove 5. At this time, the insertion head 4 of the male insert 1 is inserted into the second jack of the female insert 3 and abuts against the transmission spring 6 in the second jack, realizing the signal and electric energy transmission between the near-bit measurement joint 01 and the screw-in tool string 02 ( Figure 5 the position shown by the dotted line frame is the installation position of this device); after use, push the screw-in tool string 02 inward and reverse it. After it cannot be rotated, pull it back to remove the screw-in tool string 02.

[0039] This device has the following advantages:

[0040] First, since the method of using this device to assemble the near-bit tool is to first connect the near-bit measurement joint 01 with the hollow screw in advance, and then connect the screw-in tool string 02 with the near-bit measurement joint 01. Compared with the traditional method, it only needs to insert the screw-in tool string 02 into the hollow screw and then connect it with the near-bit measurement joint 01 through this device, rather than inserting the screw-in tool string 02 connected with the near-bit measurement joint 01 (which is heavy and difficult to lift manually) into the hollow screw, which is convenient for operation and reduces the risk of instrument damage.

[0041] Second, it can quickly complete the connection between the near-bit measurement joint 01 and the screw-in tool string 02 before the operation is required, realize the signal and electric energy transmission, prevent the premature loss of electric energy, and save costs.

[0042] Third, the device has a simple structure, and within the hollow screw, the quick connection between the instrument string 02 inside the screw and the near-bit measurement sub 01 can be completed without the need for visual alignment.

[0043] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A quick connection device for a downhole motor inner tool, characterized in that: It includes a male insert, a positioning sleeve, an elastic component and a female insert. The first end of the male insert is used to connect with the near-bit measurement sub, the second end of the male insert is provided with a first jack, and an insert head is arranged in the first jack; the first end of the positioning sleeve is inserted into the first jack and forms a cavity between the bottom of the first jack; the elastic component is arranged in the cavity, and the second end of the positioning sleeve is provided with an anti-disengagement groove; the first end of the female insert is used to connect with the downhole tool string in the screw drill, the second end of the female insert is provided with a second jack, a transmission spring is arranged in the second jack, and a pin shaft is arranged on the second end of the female insert; when the male insert is inserted into the female insert, the insert head of the male insert is inserted into the second jack of the female insert and abuts against the transmission spring, so that signal and electric energy are transmitted between the near-bit measurement sub and the downhole tool string in the screw drill, and the second end of the female insert is inserted into the positioning sleeve and abuts against the elastic component in the male insert, so that the pin shaft on the female insert is clamped in the anti-disengagement groove of the positioning sleeve.

2. The quick connection device for the downhole near-bit screw drill tool according to claim 1, characterized in that: The elastic component includes a spring, and the spring is sleeved on the insert head of the male insert and is located between the bottom of the first jack and the first end of the positioning sleeve.

3. The quick connection device for downhole near-bit screw drill tools according to claim 2, wherein: The elastic component further includes a gasket, and the gasket is sleeved on the insert head of the male insert and is located between the spring and the first end of the positioning sleeve.

4. The quick connection device for downhole near-bit screw drill tool according to claim 1, characterized in that: The male insert, the insert head and the female insert are all of cylindrical structure, the first jack of the male insert and the second jack of the female insert are both circular holes, and the insert head is coaxially fixed in the first jack of the male insert; the positioning sleeve is of cylindrical structure.

5. The quick connection device for downhole near-bit screw drill tool according to claim 4, characterized in that: The first end of the positioning sleeve is threadedly connected to the first jack of the male insert.

6. The quick connection device for downhole near-bit screw drill tool according to claim 4, characterized in that: The anti-disengagement groove is an L-shaped groove, and the L-shaped groove includes a long vertical groove, a horizontal groove and a short vertical groove which are connected in sequence. The long vertical groove extends along the direction from the first end to the second end of the positioning sleeve and penetrates through the end of the second end of the positioning sleeve, so that the pin shaft on the female insert can be inserted into the long vertical groove; when the second end of the female insert presses the elastic component in the male insert, the pin shaft can move along the long vertical groove to the horizontal groove, and when the female insert is rotated, the pin shaft can move along the horizontal groove to the short vertical groove and can be clamped with the short vertical groove.

7. The quick connection device for downhole near-bit screw drill tool according to claim 6, characterized in that: At least two L-shaped grooves are provided, and the two L-shaped grooves are evenly distributed at the second end of the positioning sleeve; at least two pin shafts are provided, and the pin shafts are arranged in one-to-one correspondence with the L-shaped grooves.

8. The quick connection device for the downhole drill bit screw-in tool according to any one of claims 1-7, characterized in that: The transmission spring includes a plurality of spring pieces, and all the spring pieces are evenly distributed on the side wall of the second jack of the female insert.

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