Measurement-while-drilling equipment and drilling equipment with measurement-while-drilling equipment

Abstract

The invention discloses measurement-while-drilling equipment which is connected between an upper drill collar and a lower drill collar of drilling equipment and comprises a directional short section, a circulating sleeve and a pulse signal generator. A first flow channel is formed in the upper drill collar, a second flow channel is formed in the directional short section, and a third flow channel is formed in the lower drill collar; and the first runner, the second runner and the third runner are communicated in sequence. The circulating sleeve is arranged in the second flow channel, a displacement adjusting channel is formed in the circulating sleeve in the length direction of the second flow channel, and a flow limiting ring used for circulating drilling fluid is arranged in the displacement adjusting channel. The pulse signal generator comprises a sleeve and a pressure regulating rod assembly movably arranged in the sleeve. The sleeve is partially arranged in the first flow channel, and one end of the sleeve is fixed in the displacement adjusting channel. And the end part of the pressure regulating rod assembly can extend into the displacement regulating channel along the length direction of the sleeve. Adjustment of the flow area of the drilling fluid is achieved, and the equipment can be suitable for the working condition with the larger displacement of the drilling fluid.

Description

Technical Field

[0001] The present application relates to the technical field of drilling construction equipment, and in particular to a measurement while drilling equipment and a drilling equipment having the measurement while drilling equipment. Background Art

[0002] Measurement while drilling technology is an advanced logging technology in the field of directional drilling. Specifically, during the drilling process, the instrument and the drill bit are put into the well together to measure and transmit the logging data downhole in real time. The logging data generally includes well inclination, azimuth and some formation parameter information. Conventional measurement while drilling technology uses a pulse signal generator as a downhole signal transmission device, which generates a certain regular mud pressure pulse signal when working. The pressure pulse signal is transmitted to the wellhead through the wellbore, and the signal is collected and decoded by special equipment.

[0003] The structures of the measurement while drilling equipment in the existing technology all have the problem of small drilling fluid flow channel area, and cannot adapt to the working conditions of excessive drilling fluid displacement. The drilling fluid flows in a circulation channel composed of a riser, downhole drill pipe and mud pool. Excessive drilling fluid displacement will cause excessive pressure in the riser, greatly increasing the safety risk of drilling construction.

[0004] Therefore, how to provide a measurement while drilling device suitable for large-volume drilling fluid working conditions is a problem that needs to be solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present application is to provide a measurement while drilling device suitable for large-volume drilling fluid working conditions.

[0006] To achieve the above-mentioned purpose, the present application provides a measurement while drilling device, which is connected between the upper drill collar and the lower drill collar of the drilling equipment, and includes: a directional short section, a circulation sleeve and a pulse signal generator;

[0007] A first flow channel is opened inside the upper drill collar, a second flow channel is opened inside the directional short joint, and a third flow channel is opened inside the lower drill collar. The first flow channel, the second flow channel and the third flow channel are connected in sequence.

[0008] The circulation sleeve is arranged in the second flow channel, and a displacement regulating channel is opened inside along the length direction of the second flow channel, a limiting flow ring is arranged inside the displacement regulating channel, and the inner hole of the limiting flow ring is used to circulate drilling fluid;

[0009] The pulse signal generator includes a sleeve and a pressure regulating rod assembly movably arranged inside the sleeve; the sleeve portion is arranged in the first flow channel, and one end of the sleeve is fixed in the displacement regulating channel;

[0010] The end of the pressure regulating rod assembly can extend into the displacement regulating channel along the length direction of the casing, thereby changing the drilling fluid flow area between the end of the pressure regulating rod assembly and the inner hole of the flow limiting ring to achieve pressure pulse.

[0011] In some embodiments, the interior of the displacement regulating channel is divided into a first cavity section, a second cavity section and a third cavity section which are connected in sequence; the inner wall of the first cavity section is used to fix one end of the connecting casing; the flow limiting ring is arranged inside the third cavity section; the end of the pressure regulating rod assembly can move in the second cavity section, so as to adjust the drilling fluid flow area between the inner hole of the flow limiting ring.

[0012] In some embodiments, the pressure regulating rod assembly includes: an electromagnetically controlled reflux mechanism and a movable valve stem mechanism;

[0013] The end of the movable valve stem mechanism can extend to the outside of the sleeve end, and the interior of the movable valve stem mechanism is communicated with the interior of the displacement adjustment channel;

[0014] The electromagnetically controlled reflux mechanism is arranged away from the second flow channel relative to the movable valve stem mechanism, and the electromagnetically controlled reflux mechanism can control the drilling fluid in the first flow channel to flow into the movable valve stem mechanism, thereby balancing the internal pressure of the movable valve stem mechanism.

[0015] In some embodiments, the movable valve stem mechanism includes: a compression spring, a piston cap, a signal valve stem and a main valve core;

[0016] A spring installation groove is provided on the inner wall of the sleeve, the first end of the compression spring is fixed in the spring installation groove, the first end of the signal valve stem is connected to the second end of the compression spring through the piston cap, the second end of the signal valve stem extends into the displacement adjustment channel, and the main valve core is arranged at the second end of the signal valve stem;

[0017] The main valve core, the signal valve stem and the piston cap are all provided with sequentially connected liquid flow channels; the piston cap is used to seal the gap between the signal valve stem and the sleeve, so as to adjust the pressure difference between the inside and outside of the signal valve stem.

[0018] In some embodiments, the electromagnetically regulated backflow mechanism comprises: an electromagnet, a piston chamber, a valve sleeve and a screen cylinder;

[0019] The screen cylinder is sleeved outside the valve sleeve, and the peripheral surface of the screen cylinder is provided with screen holes communicating with the inside of the valve sleeve and the first flow channel;

[0020] The first end of the valve sleeve is connected to one side of the sleeve where a movable valve stem mechanism is arranged, and the piston cavity is opened between the second end of the valve sleeve and the electromagnet;

[0021] A valve stem and a piston cylinder are arranged in the piston cavity, the movable end of the piston cylinder is connected to the valve stem, and the fixed end of the piston cylinder is connected to the electromagnet; the piston cylinder can drive the valve stem to extend from the second end of the valve sleeve into the interior thereof to disconnect the connection between the valve sleeve and the sleeve; the electromagnet can attract the valve stem to move toward itself.

[0022] In some embodiments, the valve stem is at least partially located inside the valve sleeve, and the piston cavity is filled with hydraulic oil to reduce the pressure difference between the inside and outside of the sleeve.

[0023] In some embodiments, the opening of the inner hole of the current limiting ring facing the pulse signal generator is configured as a bell mouth.

[0024] In some embodiments, the inner wall of the first cavity section is provided with a guide shoe thread concave surface along the length direction of the displacement regulating channel, and the outer peripheral surface of the casing end is provided with a guide shoe thread convex surface along its own length direction; the guide shoe thread convex surface can cooperate with the guide shoe thread concave surface so that the casing can be inserted into the displacement regulating channel in the direction toward the lower drill collar.

[0025] In some embodiments, an inner wall of the first cavity section is provided with a directional key for installing the guide sleeve.

[0026] The present application also provides a drilling device, including a master control system, an upper drill collar, a lower drill collar and any one of the above measurement while drilling devices, wherein the master control system is connected to the measurement while drilling device via an electrical connection line arranged inside the upper drill collar.

[0027] Compared with the above background technology, the present application is provided with a directional short section, a circulation sleeve and a pulse signal generator. A first flow channel is provided inside the upper drill collar, a second flow channel is provided inside the directional short section, and a third flow channel is provided inside the lower drill collar. The first flow channel, the second flow channel and the third flow channel are connected in sequence. The circulation sleeve is arranged in the second flow channel, and a displacement regulating channel is provided inside the circulation sleeve along the length direction of the second flow channel. A limiting flow ring is arranged inside the displacement regulating channel, and the inner hole of the limiting flow ring is used to circulate drilling fluid. The pulse signal generator includes a casing and a pressure regulating rod assembly movably arranged inside the casing. The casing is partially arranged in the first flow channel, and one end of the casing is fixed in the displacement regulating channel. The end of the pressure regulating rod assembly can extend into the displacement regulating channel along the length direction of the casing. The present application realizes the adjustment of the flow area of ​​the drilling fluid in the displacement regulating channel, so that the measurement while drilling equipment can be applied to the working conditions of higher drilling fluid displacement. At the same time, adjusting the flow area of ​​the drilling fluid can reduce the pressure of the overall drilling equipment, improve the decoding rate of the pulse signal, reduce instrument erosion, and improve its structural strength.

[0028] The drilling equipment provided in the present application with the above-mentioned measurement while drilling equipment has the above-mentioned beneficial effects, which will not be elaborated in this article. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1A schematic diagram of the assembly of a measurement while drilling device provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the structure of the circulation sleeve provided in the embodiment of the present application;

[0032] Figure 3 A schematic diagram of the structure of a pulse signal generator provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of the structure of a pulse signal generator and a circulation sleeve when the signal valve stem is in a depressed state provided by an embodiment of the present application;

[0034] Figure 5 This is a schematic structural diagram of the pulse signal generator and the circulation sleeve when the signal valve stem is in the lifted state provided in an embodiment of the present application.

[0035] in:

[0036] 1-upper drill collar, 2-lower drill collar, 3-directional short section,

[0037] 4-circulation sleeve, 41-current limiting ring, 42-guiding shoe thread concave surface, 43-directional key,

[0038] 5-pulse signal generator, 51-casing, 511-lead shoe thread convex surface, 52-compression spring, 53-piston cap, 54-signal valve stem, 55-main valve core, 56-electromagnet, 57-valve sleeve, 58-screen cylinder, 59-valve stem,

[0039] 6-Piston cylinder. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] Reference Manual Attached Figure 1 -Attached Figure 3 , attached Figure 1 This is a schematic diagram of the assembly of the measurement while drilling equipment provided in the embodiment of the present application. Figure 2 A schematic diagram of the structure of the circulation sleeve provided in the embodiment of the present application, Figure 3The schematic diagram of the structure of the pulse signal generator provided in the embodiment of the present application includes a measurement while drilling device, which is connected between the upper drill collar 1 and the lower drill collar 2 of the drilling equipment, and includes: a directional short section 3, a circulation sleeve 4 and a pulse signal generator 5. A first flow channel is opened inside the upper drill collar 1, a second flow channel is opened inside the above-mentioned directional short section 3, and a third flow channel is opened inside the above-mentioned lower drill collar 2. The above-mentioned first flow channel, the second flow channel and the third flow channel are connected in sequence, that is, the directional short section 3 is connected to the upper drill collar 1 and the lower drill collar 2, and the torque and drilling pressure of the drilling tool are transmitted through the directional short section 3. The circulation sleeve 4 is arranged in the second flow channel, and a displacement regulating channel is opened inside the circulation sleeve 4 along the length direction of the second flow channel, and a limiting flow ring 41 is arranged inside the above-mentioned displacement regulating channel, and the inner hole of the above-mentioned limiting flow ring 41 is used to circulate drilling fluid. The above-mentioned pulse signal generator 5 includes: a casing 51 and a pressure regulating rod assembly movably arranged inside the casing 51. The sleeve 51 is partially disposed in the first flow channel, and one end of the sleeve 51 is fixed in the displacement regulating channel. The end of the pressure regulating rod assembly can extend into the displacement regulating channel along the length direction of the sleeve 51.

[0043] During drilling construction, the lower drill collar 2 is extended downward into the wellbore, and then the measurement while drilling equipment and the upper drill collar 1 are sequentially entered into the bottom of the well. The drilling fluid can flow in the first flow channel, the second flow channel and the third flow channel. When the drilling fluid does not start to flow, the drilling fluid will form a stable pressure inside the displacement regulating channel, and the end of the pressure regulating rod assembly will also maintain a stable position unchanged. When the drilling fluid starts to flow at high speed, the drilling fluid generates reverse pressure when flowing through the inner hole of the limiting ring 41, pushing the pressure regulating rod assembly upward. At this time, the drilling fluid flow area between the pressure regulating rod assembly and the limiting ring 41 increases, and the pressure in the entire connecting flow channel decreases. When a pulse signal needs to be generated, the end of the pressure regulating rod assembly is controlled to move toward the limiting ring 41, thereby compressing the drilling fluid flow area between the two, so that the pressure in the flow channel is increased, and a positive pressure pulse is generated to achieve measurement while drilling.

[0044] The present application creates a structure for adjusting the internal pressure of the drill pipe flow channel by setting a displacement regulating channel, and realizes the adjustment of the drilling fluid flow area in the displacement regulating channel, so that the measurement while drilling equipment can be applied to the working conditions with higher drilling fluid displacement. In actual use, by changing the inner diameter size of the flow limiting ring 41 and the specifications of the pressure regulating rod assembly, the upper and lower limits of the drilling fluid flow area between the two can be adjusted, thereby adjusting the size of the measurement while drilling equipment according to parameters such as the actual drilling fluid displacement, so that it can adapt to the working conditions with a larger drilling fluid displacement. At the same time, increasing the circulation area of ​​the drilling fluid can reduce the pressure of the overall drilling equipment, improve the decoding rate of the pulse signal, reduce instrument erosion, and improve its structural strength.

[0045] Furthermore, the displacement regulating channel is internally divided into a first cavity section, a second cavity section and a third cavity section which are connected in sequence. The inner wall of the first cavity section is used to fix one end of the casing 51, and the outer periphery of the end of the casing 51 is fixedly connected to the inner wall of the first cavity section without affecting the movement of the pressure regulating rod assembly inside the casing 51. The limiting ring 41 is arranged inside the third cavity section, and the end of the pressure regulating rod assembly can move in the second cavity section to adjust the internal drilling fluid flow area.

[0046] Furthermore, the pressure regulating rod assembly includes: an electromagnetically controlled reflux mechanism and a movable valve stem mechanism. The end of the movable valve stem mechanism can extend to the outside of the end of the casing 51, and the interior of the movable valve stem mechanism is connected to the interior of the displacement regulating channel. The electromagnetically controlled reflux mechanism is arranged away from the second flow channel relative to the movable valve stem mechanism. When the drilling fluid quickly flows from the second flow channel through the inner hole of the limiting ring 41 to the inside of the movable valve stem mechanism, the movable valve stem mechanism will be pushed by the pressure difference to move in the direction of the first flow channel; but when it is necessary to obtain an electromagnetic pulse signal, the staff can control the drilling fluid in the first flow channel to flow into the inside of the movable valve stem mechanism through the electromagnetically controlled reflux mechanism, thereby balancing the internal pressure of the movable valve stem mechanism. After the pressure is balanced, the movable valve stem mechanism will move in the direction away from the first flow channel and return to its original position. This reset process will generate a positive pressure pulse between the end of the movable valve stem mechanism and the limiting ring 41.

[0047] Further, refer to the attached manual Figure 4 and attached Figure 5 , Figure 4 A schematic diagram of the structure of a pulse signal generator and a circulation sleeve when the signal valve stem is in a depressed state provided by an embodiment of the present application;

[0048] Figure 5 This is a schematic diagram of the structure of the pulse signal generator and the circulation sleeve when the signal valve stem is in the lifted state provided in the embodiment of the present application. The movable valve stem mechanism includes: a compression spring 52, a piston cap 53, a signal valve stem 54 and a main valve core 55. A spring installation groove is provided on the inner wall of the sleeve 51. The first end of the compression spring 52 is fixed in the spring installation groove. The first end of the signal valve stem 54 is connected to the second end of the compression spring 52 through the piston cap 53. The second end of the signal valve stem 54 extends into the displacement adjustment channel. The main valve core 55 is arranged at the second end of the signal valve stem 54. The compression spring 52 is arranged along the length direction of the sleeve 51. The piston cap 53 is slidably sealed with the pipe sleeve 51. When working, the piston cap 53 moves together with the signal valve stem 54.

[0049] The main valve core 55, signal valve stem 54 and piston cap 53 are all provided with sequentially connected liquid flow passages. Under normal conditions when the drilling fluid is not flowing, the elastic force of the compression spring 52 will keep the position of the signal valve stem 54 unchanged. However, since the piston cap 53 is used to seal the gap between the signal valve stem 54 and the casing 51, when the high-speed flowing drilling fluid flows from the second flow passage through the limiting ring 41 to the third flow passage, a pressure difference will be generated inside and outside the signal valve stem 54, and the drilling fluid will form a reverse driving force at the main valve core 55, causing the main valve core 55 to lift up.

[0050] Furthermore, the electromagnetic control reflux mechanism comprises: an electromagnet 56, a piston chamber, a valve sleeve 57 and a screen cylinder 58. The screen cylinder 58 is sleeved outside the valve sleeve 57, and the sieve holes are formed on the circumference of the screen cylinder 58, and the sieve holes can connect the inside of the valve sleeve 57 with the inside of the first flow channel.

[0051] The first end of the valve sleeve 57 is connected to one side of the movable valve stem mechanism disposed inside the casing 51, and the piston chamber is opened between the second end of the valve sleeve 57 and the electromagnet 56. The valve stem 59 and the piston cylinder 6 are disposed in the piston chamber, the movable end of the piston cylinder 6 is connected to the valve stem 59, and the fixed end of the piston cylinder 6 is connected to the electromagnet 56. The piston cylinder 6 can drive the valve stem 59 to extend from the second end of the valve sleeve 57 into the interior thereof, fill the space inside the valve sleeve 57, block the sieve hole, and disconnect the valve sleeve 57 from the casing 51. The electromagnet 56 can attract the valve stem 59 to move toward itself, so that the valve stem 59 used for blocking the sieve hole is removed, and the drilling fluid can flow into the valve sleeve 57 and the movable valve stem mechanism again.

[0052] Furthermore, the valve stem 59 is at least partially located inside the valve sleeve 57, and the piston cavity is filled with hydraulic oil to reduce the pressure difference between the inside and outside of the casing 51. The hydraulic oil has the same pressure as the external annular mud, which protects the internal structure of the pulser from being damaged by the high pressure of the mud on the one hand, and greatly reduces the force of the electromagnet 56 to pull the valve stem 59 on the other hand.

[0053] Furthermore, the opening of the inner hole of the current limiting ring 41 facing the pulse signal generator 5 is configured as a bell mouth, and the bell mouth is intended to allow the mud to pass smoothly to avoid erosion.

[0054] Furthermore, the inner wall of the first cavity section is provided with a guide shoe thread concave surface 42 along the length direction of the displacement adjustment channel, and the outer peripheral surface of the end of the sleeve 51 is provided with a guide shoe thread convex surface 511, and the guide shoe thread convex surface 511 is provided along the length direction of the sleeve 51. The sleeve 51 can be installed into the displacement adjustment channel in the direction toward the lower drill collar 2, and the guide shoe thread convex surface 511 is installed by matching with the guide shoe thread concave surface 42.

[0055] Furthermore, the inner wall of the first cavity section is provided with a directional key 43 for installing the guide sleeve 51. In actual use, the guide sleeve 51 can be "seated" in the circulation sleeve 4 by gravity through the directional key 43, so that the concave surface 42 of the guide shoe thread is completely fitted with the convex surface 511 of the guide shoe thread, and the instrument is installed with the key.

[0056] The present application also provides a drilling equipment, including a master control system, an upper drill collar 1, a lower drill collar and a measurement while drilling device described in the above specific embodiment; the above master control system is connected to the measurement while drilling device via an electrical connection line arranged inside the upper drill collar 1. The setting method and use method of the drilling equipment can refer to the prior art, which will not be described in detail herein. It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0057] The measurement while drilling equipment and the drilling equipment with the measurement while drilling equipment provided by the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A measurement while drilling device connected between an upper drill collar (1) and a lower drill collar (2) of a drilling device, characterized in that: include: A directional short section (3), a circulation sleeve (4) and a pulse signal generator (5); A first flow channel is provided inside the upper drill collar (1), a second flow channel is provided inside the directional nipple (3), and a third flow channel is provided inside the lower drill collar (2), wherein the first flow channel, the second flow channel and the third flow channel are connected in sequence; The circulation sleeve (4) is arranged in the second flow channel, and a displacement regulating channel is opened inside along the length direction of the second flow channel, a limiting flow ring (41) is arranged inside the displacement regulating channel, and the inner hole of the limiting flow ring (41) is used to circulate drilling fluid; The pulse signal generator (5) comprises a sleeve (51) and a pressure regulating rod assembly movably arranged inside the sleeve (51); the sleeve (51) is partially arranged in the first flow channel, and one end of the sleeve (51) is fixed in the displacement regulating channel; The end of the pressure regulating rod assembly can extend into the displacement regulating channel along the length direction of the casing (51), thereby changing the drilling fluid flow area between the end of the pressure regulating rod assembly and the inner hole of the limiting ring (41) to achieve pressure pulse.

2. The measurement while drilling device according to claim 1, characterized in that: The interior of the displacement regulating channel is divided into a first cavity section, a second cavity section and a third cavity section which are connected in sequence; the inner wall of the first cavity section is used to fix one end of the casing (51); the flow limiting ring (41) is arranged inside the third cavity section; the end of the pressure regulating rod assembly can move in the second cavity section, so as to adjust the drilling fluid flow area between the end and the inner hole of the flow limiting ring (41).

3. The measurement while drilling device according to claim 1, characterized in that: The pressure regulating rod assembly includes: an electromagnetic regulating reflux mechanism and a movable valve stem mechanism; The end of the movable valve stem mechanism can extend to the outside of the end of the sleeve (51), and the interior of the movable valve stem mechanism is connected to the interior of the displacement adjustment channel; The electromagnetically regulated reflux mechanism is arranged away from the second flow channel relative to the movable valve stem mechanism, and the electromagnetically regulated reflux mechanism can control the drilling fluid in the first flow channel to flow into the interior of the movable valve stem mechanism, thereby balancing the internal pressure of the movable valve stem mechanism.

4. The measurement while drilling device according to claim 3, characterized in that: The movable valve stem mechanism comprises: a compression spring (52), a piston cap (53), a signal valve stem (54) and a main valve core (55); The inner wall of the sleeve (51) is provided with a spring installation groove, the first end of the compression spring (52) is fixed in the spring installation groove, the first end of the signal valve stem (54) is connected to the second end of the compression spring (52) through the piston cap (53), the second end of the signal valve stem (54) extends into the displacement adjustment channel, and the main valve core (55) is arranged at the second end of the signal valve stem (54); The main valve core (55), the signal valve stem (54) and the piston cap (53) are all provided with sequentially connected liquid flow channels; the piston cap (53) is used to seal the gap between the signal valve stem (54) and the sleeve (51), thereby adjusting the pressure difference inside and outside the signal valve stem (54).

5. The measurement while drilling device according to claim 3, characterized in that: The electromagnetic control reflux mechanism comprises: an electromagnet (56), a piston chamber, a valve sleeve (57) and a screen cylinder (58); The sieve cylinder (58) is sleeved on the outside of the valve sleeve (57), and a sieve hole is formed on the circumference of the sieve cylinder (58) to communicate with the inside of the valve sleeve (57) and the first flow channel; The first end of the valve sleeve (57) is connected to a side of the sleeve (51) where the movable valve stem mechanism is arranged, and the piston chamber is opened between the second end of the valve sleeve (57) and the electromagnet (56); A valve stem (59) and a piston cylinder (6) are arranged in the piston cavity; the movable end of the piston cylinder (6) is connected to the valve stem (59), and the fixed end of the piston cylinder (6) is connected to the electromagnet (56); the piston cylinder (6) can drive the valve stem (59) to extend from the second end of the valve sleeve (57) into the interior thereof to disconnect the connection between the valve sleeve (57) and the sleeve (51); the electromagnet (56) can attract the valve stem (59) to move toward itself.

6. The measurement while drilling device according to claim 5, characterized in that: The valve stem (59) is at least partially located inside the valve sleeve (57), and the piston chamber is filled with hydraulic oil to reduce the pressure difference between the inside and outside of the sleeve (51).

7. The measurement while drilling device according to claim 1, characterized in that: The opening of the inner hole of the current limiting ring (41) facing the pulse signal generator (5) is configured as a bell mouth.

8. The measurement while drilling device according to claim 2, characterized in that: The inner wall of the first cavity section is provided with a guide shoe thread concave surface (42) along the length direction of the displacement adjustment channel, and the outer peripheral surface of the end of the sleeve (51) is provided with a guide shoe thread convex surface (511) along its own length direction; the guide shoe thread convex surface (511) can cooperate with the guide shoe thread concave surface (42) so that the sleeve (51) can be installed into the displacement adjustment channel in a direction toward the lower drill collar (2).

9. The measurement while drilling device according to claim 8, characterized in that: A directional key (43) for guiding the installation of the sleeve (51) is provided on the inner wall of the first cavity section.

10. A drilling equipment, comprising a master control system, the upper drill collar (1) and the lower drill collar (2), characterized in that: The drilling measurement device comprises the drilling measurement device according to any one of claims 1 to 9, wherein the master control system is connected to the drilling measurement device via an electrical connection line arranged inside the upper drill collar (1).

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