Anti-disengagement structure for preventing orientation instrument from disengagement
By using anti-detachment structures in directional well construction, including components such as magnetic-free drill collars and anti-detachment rods, the problem of directional instruments being detached in large wells in oblique angles and deep drilling holes is solved, and the normal use of the instrument and the improvement of construction progress is achieved.
Patent Information
- Application Number
- CN202421968956.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-14
AI Technical Summary
In the construction of directional wells, especially during the drilling of horizontal and large-well oblique directional wells, directional instruments are prone to debonding due to the lifting or lowering of downhole drilling tools too quickly, resulting in the inability to work normally or damage, affecting construction safety and efficiency.
The anti-detachment structure is adopted, including components such as magnetic-free drill collars, anti-detachment rods, heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of the heads of
Effectively prevent directional instruments from debonding in large well angles and deep drilling holes, ensure normal use of the instrument, simplify operational processes, improve construction progress and safety, and reduce instrument damage caused by accidents in the hole.
Smart Images
Figure CN223075479U_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of directional well construction, and particularly relates to an anti-disengagement structure for preventing a downhole directional instrument from disengaging during the drilling process of a horizontal and large well inclination directional well. Background Art
[0002] Horizontal branched wells for coal mine area governance have become an important technical means for coal mine area governance. Through several years of technical research and application practice, the drilling technology of horizontal branched wells for coal mine area governance has become increasingly mature, and good results have been achieved in the treatment of coal mine water disasters.
[0003] With the increasing popularity of directional drilling construction, ensuring the safety of instruments is also an issue that cannot be ignored during the directional construction process. Directional instruments are costly and relatively precise. During the ground installation and connection operation process, careful operation is required to avoid knocking the instrument and causing damage to the instrument.
[0004] For the downhole connection method of the directional instrument, a fish head is provided at the end of the instrument, and the instrument fish head is connected by a fishing head and sent into the non-magnetic drill collar. The anti-disengagement top rod is designed according to the connection method of the fishing head and the instrument fish head. Due to factors such as the scope of the treatment working face, the complex geological structure of the coal measure strata, the large fluctuation of the formation dip angle, and the construction position of the surface drilling equipment, it will have a great impact on the design of the downhole horizontal branched hole. Often, there will be a horizontal branched hole greater than 90° or a branched hole with an entire section of uphill trajectory in the treatment horizon. During the drilling process, if the downhole drill string is lifted or lowered too quickly and encounters resistance, the instrument and the fixed keyway will be disengaged, which is likely to cause the directional instrument to malfunction downhole or damage the instrument. The design of the anti-disengagement top rod increases the operation safety and prevents the problem of the instrument disengaging due to the too-fast lowering of the drill string. If a stuck drill or buried drill accident occurs in the hole, the fish head at the top of the anti-disengagement rod is set the same as the instrument fish head, which does not affect fishing the directional instrument in the drill string. Summary of the Invention
[0005] The purpose of the present invention is to provide an anti-disengagement structure for preventing a downhole directional instrument from disengaging during the drilling process of a horizontal and large well inclination directional well.
[0006] To solve the above technical problems, the present invention provides an anti-disengagement structure for preventing a downhole directional instrument from disengaging during the drilling process of a horizontal and large well inclination directional well, including:
[0007] A non-magnetic drill collar, which includes a male end and a female end;
[0008] The main body of the anti-disengagement top rod;
[0009] The fish head part of the top rod, which is installed at the top of the main body of the anti-disengagement top rod; the fish head part of the top rod penetrates through the female end and extends into the male end;
[0010] The ejector rod fish head pin is installed on the ejector rod fish head and is located between the male thread end and the female thread end;
[0011] The ejector rod cylinder is installed at the bottom of the anti - detachment ejector rod body;
[0012] The directional instrument main body;
[0013] The directional instrument fish head is installed at the top of the directional instrument main body; the directional instrument fish head extends into the ejector rod cylinder for fixation;
[0014] The directional fish head pin is installed on the directional instrument fish head and abuts against the bottom of the ejector rod cylinder.
[0015] Preferably, a male thread convex block is formed by the downward protrusion at the bottom of the male thread end;
[0016] A female thread groove is formed at the top of the female thread end;
[0017] The male thread convex block extends into the female thread groove, and there is a distance between the bottom of the male thread convex block and the bottom of the female thread groove, so as to form a receiving space;
[0018] The ejector rod fish head passes through the receiving space, and the ejector rod fish head pin is located in the receiving space.
[0019] Preferably, the side wall inclination angles of the male thread convex block and the female thread groove are the same.
[0020] Preferably, both the male thread convex block and the female thread groove are frustum - of - cone shapes that are wider at the top and narrower at the bottom.
[0021] Preferably, a left - right through ejector rod fish head pin hole is formed on the ejector rod fish head;
[0022] The ejector rod fish head pin passes through the ejector rod fish head pin hole and both ends extend out of the ejector rod fish head.
[0023] Preferably, both ends of the ejector rod fish head pin abut against the side wall of the female thread groove;
[0024] The top of the ejector rod fish head pin abuts against the bottom of the male thread convex block.
[0025] Preferably, a left - right through directional pin hole is formed on the directional instrument fish head;
[0026] The directional fish head pin passes through the directional pin hole and both ends extend out of the directional instrument fish head.
[0027] Preferably, both the ejector rod fish head pin and the directional fish head pin are iron wires.
[0028] Preferably, an anti - detachment rubber ring is provided at a position near the bottom of the directional instrument main body.
[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0030] The present invention can solve the problem that in the construction of directional wells, key disengagement occurs during drilling at large well angles and relatively deep boreholes, which affects the normal use of directional instruments. In this case, the directional instrument needs to be reinstalled after pulling out the drill string. The anti-disengagement top rod is easy to install and does not affect the normal use of the instrument. In case of downhole accidents, it does not affect the use of the oil rod through the drill string to salvage the directional instrument. The invention has a simple manufacturing process and is easy to operate, and has been well verified in construction practice. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] The following further details the specific embodiments of the present invention with reference to the drawings.
[0032] Figure 1 is a schematic structural diagram of the anti-disengagement structure;
[0033] Figure 2 is a structural diagram of the directional instrument;
[0034] Figure 3 is a structural diagram of the fishing rod;
[0035] In the figure:
[0036] 1 - non-magnetic drill collar; 11 - male thread end; 111 - male thread convex block; 12 - female thread end; 121 - female thread groove; 2 - anti-disengagement top rod body; 21 - top rod fish head; 211 - top rod fish head pin hole; 22 - top rod cylinder; 23 - top rod fish head pin; 3 - directional instrument body; 31 - directional instrument fish head; 311 - directional pin hole; 32 - directional fish head pin; 33 - positioning keyway; 34 - anti-disengagement rubber ring; 4 - fishing rod. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0037] Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.
[0038] The terms used in one or more embodiments of this specification are for the purpose of describing specific embodiments only and are not intended to limit one or more embodiments of this specification. The singular forms "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and encompasses any and all possible combinations of one or more of the associated listed items.
[0039] It should be understood that although the terms first, second, etc. may be used in one or more embodiments of this specification to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".
[0040] The present invention will be further described in detail below with reference to the accompanying drawings:
[0041] The present invention provides an anti-disconnection structure for preventing a directional instrument from becoming disconnected, including:
[0042] A non-magnetic drill collar 1, which includes a male thread end 11 and a female thread end 12;
[0043] An anti-disconnection ejector rod body 2;
[0044] An ejector rod fish head 21, which is installed at the top of the anti-disconnection ejector rod body 2; the ejector rod fish head 21 extends into the male thread end 11 after passing through the female thread end 12;
[0045] An ejector rod fish head pin 23, which is installed on the ejector rod fish head 21 and is located between the male thread end 11 and the female thread end 12;
[0046] An ejector rod cylinder 22, which is installed at the bottom of the anti-disconnection ejector rod body 2;
[0047] A directional instrument body 3;
[0048] A directional instrument fish head 31, which is installed at the top of the directional instrument body 3; the directional instrument fish head 31 extends into the ejector rod cylinder 22 for fixation;
[0049] A directional fish head pin 32, which is installed on the directional instrument fish head 31 and abuts against the bottom of the ejector rod cylinder 22.
[0050] Preferably, a male thread convex block 111 is formed by downward protrusion at the bottom of the male thread end 11;
[0051] A female thread groove 121 is formed at the top of the female thread end 12;
[0052] The male thread convex block 111 extends into the female thread groove 121, and there is a distance between the bottom of the male thread convex block 111 and the bottom of the female thread groove 121, so as to form an accommodation space;
[0053] The ejector rod fish head 21 passes through the accommodation space, and the ejector rod fish head pin 23 is located in the accommodation space.
[0054] Preferably, the side wall of the male buckle bump 111 and the groove wall of the female buckle groove 121 have the same inclination angle.
[0055] Preferably, both the male buckle bump 111 and the female buckle groove 121 are frustum-shaped with a wider top and a narrower bottom.
[0056] Preferably, a top rod fish head pin hole 211 that penetrates from left to right is provided on the top rod fish head 21;
[0057] The top rod fish head pin 23 passes through the top rod fish head pin hole 211 and both ends extend out of the top rod fish head 21.
[0058] Preferably, both ends of the top rod fish head pin 23 are in contact with the groove wall of the female buckle groove 121;
[0059] The top of the top rod fish head pin 23 is in contact with the bottom of the male buckle bump 111.
[0060] Preferably, a directional pin hole 311 that penetrates from left to right is provided in the directional instrument fish head 31;
[0061] The directional fish head pin 32 passes through the directional pin hole 311 and both ends extend out of the directional instrument fish head 31.
[0062] Preferably, both the top rod fish head pin 23 and the directional fish head pin 32 are iron wires.
[0063] Preferably, an anti-disengagement rubber ring 34 is provided at a position near the bottom of the directional instrument body 3.
[0064] To better illustrate the technical effects of the present invention, the present invention provides the following specific embodiments to illustrate the above technical processes:
[0065] Embodiment 1,
[0066] The present invention provides an anti-disengagement structure for preventing a directional instrument from becoming disengaged during horizontal and high-angle directional well drilling of a downhole directional instrument, including a non-magnetic drill collar 1, an anti-disengagement top rod, a directional instrument, and a fishing rod 4.
[0067] The usage method of the anti-disengagement structure of the present invention:
[0068] Lower the directional instrument into the drill string through the positioning key groove 33 using the fishing rod 4, and then remove the fishing rod 4.
[0069] Lower the anti-disengagement top rod. The top rod cylinder 22 at the lower part of the anti-disengagement top rod is sleeved with the directional instrument fish head 31 of the directional instrument and supported by the directional instrument fish head pin;
[0070] When manufacturing the anti-disconnection lifting rod, measure the distance from the directional fish head pin 32 to the bottom of the female thread groove 121 at the end of the female thread of the female thread end 12. The measured distance position is the position of the lifting rod fish head pin 23;
[0071] Insert the lifting rod fish head pin 23 (such as 8# iron wire) into the fish head part 21 of the lifting rod of the anti-disconnection lifting rod. After the anti-disconnection lifting rod is in place, connect the upper drill pipe. The bottom end of the male thread convex block 111 at the male thread end 11 of the drill pipe presses the lifting rod fish head pin 23, thereby playing an anti-disconnection role.
[0072] Example 1: In a regional governance project of a certain mine, during the directional drilling construction of the branch hole, the drilling depth is 1600 meters, and the well deviation angle of the drilling trajectory is 105 degrees. After the drill pipe adding operation is completed, the directional instrument fails to work properly. After pulling out the drill string for inspection, it is found that the directional instrument is out of key. After installing the anti-disconnection lifting rod on the upper part of the directional instrument, there is no out-of-key phenomenon. It takes 6-7 hours for the drill string to be pulled out and run in after the directional instrument is out of key. After installing the anti-disconnection lifting rod, it can prevent the instrument from being out of key, avoid unnecessary pulling out and running in of the drill string, and thus improve the construction progress.
[0073] As mentioned above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claimed rights.
Claims
1. An anti-disengagement structure for preventing a directional instrument from disengaging the key, characterized in that, Comprising: A non-magnetic drill collar (1), which includes a male connection end (11) and a female connection end (12); An anti-disengagement mandrel body (2); A mandrel fish head (21), which is installed at the top of the anti-disengagement mandrel body (2); the mandrel fish head (21) extends into the male connection end (11) after passing through the female connection end (12); A mandrel fish head pin (23), which is installed on the mandrel fish head (21) and is located between the male connection end (11) and the female connection end (12); A mandrel cylinder (22), which is installed at the bottom of the anti-disengagement mandrel body (2); An orientation instrument body (3); An orientation instrument fish head (31), which is installed at the top of the orientation instrument body (3); the orientation instrument fish head (31) extends into the mandrel cylinder (22) for fixation; An orientation fish head pin (32), which is installed on the orientation instrument fish head (31) and abuts against the bottom of the mandrel cylinder (22).
2. The anti-disengagement structure for preventing the orientation instrument from disengaging according to claim 1, characterized in that: A male connection convex block (111) is formed by downward protrusion at the bottom of the male connection end (11); A female connection groove (121) is formed at the top of the female connection end (12); The male connection convex block (111) extends into the female connection groove (121), and there is a distance between the bottom of the male connection convex block (111) and the bottom of the groove of the female connection groove (121), so as to form a receiving space; The mandrel fish head (21) passes through the receiving space, and the mandrel fish head pin (23) is located in the receiving space.
3. The anti-disengagement structure for preventing the orientation instrument from disengaging according to claim 2, characterized in that: The side wall of the male connection convex block (111) and the groove wall of the female connection groove (121) have the same inclination angle.
4. The anti-disengagement structure for preventing the orientation instrument from disengaging according to claim 3, characterized in that: Both the male connection convex block (111) and the female connection groove (121) are frustum-shaped with a wider top and a narrower bottom.
5. The anti-disengagement structure for preventing the orientation instrument from disengaging according to claim 4, characterized in that: A mandrel fish head pin hole (211) penetrating left and right is formed on the mandrel fish head (21); The mandrel fish head pin (23) passes through the mandrel fish head pin hole (211) and both ends extend out of the mandrel fish head (21).
6. The anti-disengagement structure for preventing the orientation instrument from disengaging according to claim 5, characterized in that: Both ends of the mandrel fish head pin (23) abut against the groove wall of the female connection groove (121); The top of the mandrel fish head pin (23) abuts against the bottom of the male connection convex block (111).
7. The anti-disengagement structure for preventing the orientation instrument from disengaging according to claim 6, characterized in that: An orientation pin hole (311) penetrating left and right is formed on the orientation instrument fish head (31); The orientation fish head pin (32) passes through the orientation pin hole (311) and both ends extend out of the orientation instrument fish head (31).
8. The anti-disengagement structure for preventing the orientation instrument from disengaging according to claim 7, characterized in that: Both the mandrel fish head pin (23) and the orientation fish head pin (32) are made of iron wire.
9. The anti-disengagement structure for preventing the directional instrument from disengaging the key, characterized in that: The directional instrument body (3) is provided with an anti-disengagement rubber ring (34) at a position near the bottom.
10. The anti-disengagement structure for preventing the directional instrument from disengaging the key according to claim 9, characterized in that: The bottom of the directional instrument body (3) is provided with a positioning key groove (33) for connecting with the fishing rod (4).