An electronic inclinometer instrument launching and measuring protection device suitable for gas drilling

Abstract

The present application relates to a kind of electronic inclinometer instrument protection device suitable for gas drilling in the field of oil and gas drilling, geological exploration and mine drilling technology, including propeller, upper support, outer cylinder, main pull rod, lower support, inclined pull rod, palm, support rod, slide passage hole, cap, air inlet, fishing spear, flow resistance ring.Outer cylinder is cylindrical structure, lower end is joint, middle lower part is air inlet, equipped with flow resistance ring, inside installation has brake function mechanism.The upper end of main pull rod is propeller and fishing spear, inclined pull rod is fixed between lower support and support rod, support rod one end is equipped with palm, other end is articulated at cap, support rod extends out of outer cylinder by slide passage hole, can greatly reduce the free falling speed of measuring instrument, to realize the free measurement of gas drilling measuring instrument and wellbore trajectory continuous measurement provide safeguard, while simplifying gas drilling inclinometer process flow, easy to operate, easy to promote and apply on site.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas drilling, geological exploration and mine drilling, in particular to a kind of electronic inclinometer instrument is thrown and measures the protection device suitable for gas drilling. BACKGROUND

[0002] Gas drilling is a kind of drilling technology using air, natural gas, nitrogen and tail gas as circulating medium, due to the advantages of maximum protection of oil and gas reservoir, timely discovery of oil and gas show, greatly improving drilling speed, shortening the well construction period, improving oil and gas recovery and so on, in recent years, the application in the construction of vertical well, directional well and horizontal well has made great progress.

[0003] During gas drilling, since the medium in the wellbore is basically all gas, when measuring well inclination, azimuth and other well trajectory parameters using electronic single or multi-point inclinometer, if it is the same as drilling with drilling fluid, the measuring instrument is directly put into the bottom of the well, the instrument will almost fall freely, and when it reaches the bottom of the well, the falling speed and impact force of the instrument will be very large, so that the existing electronic single or multi-point inclinometer will be difficult to withstand such a large vibration impact and is easy to be damaged.

[0004] Up to now, the measurement of well trajectory data during gas drilling is still mainly by using inclinometer car hoisting measurement, which is to use inclinometer winch at the wellhead to send electronic single or multi-point inclinometer into the bottom of the well for inclinometry through steel wire rope, and after inclinometry is completed, the instrument is recovered to the ground through the steel wire rope; However, this inclinometry method has certain defects and limitations, for example:

[0005] 1) If the inclinometry personnel operate improperly, the steel wire rope is locally corroded or worn, etc., the steel wire rope may break, the instrument may fall into the well and be damaged;

[0006] 2) Using inclinometer car hoisting measurement method, only 1-3 different well depth positions of well inclination and azimuth data can be measured at a time, the inclinometry operation is complex and the inclinometry efficiency is low;

[0007] 3) Using inclinometer car hoisting measurement method, the inclinometry interval is generally long (≥100 meters), which cannot realize "continuous inclinometry" of gas drilling section, and cannot help the site personnel accurately master the well trajectory condition of the drilled section.

[0008] Therefore, if there is a kind of protection device suitable for gas drilling, which can obviously slow down the free falling speed of the measuring instrument, realize the free throwing and measuring of electronic inclinometer during gas drilling, the inclinometry efficiency of gas drilling can be greatly improved and the construction risk of gas drilling can be reduced. SUMMARY

[0009] The present application aims at the deficiency in the prior art, and provides an electronic inclinometer instrument launching and measuring protection device suitable for gas drilling.

[0010] The technical scheme is as follows:

[0011] The electronic inclinometer instrument launching and measuring protection device suitable for gas drilling comprises a cylindrical and hollow outer cylinder (3) with a diameter smaller than that of a drill string, an upper end of the outer cylinder (3) is open, a lower end of the outer cylinder (3) is closed, a joint for connecting the electronic inclinometer instrument is arranged at the lower end, air inlet holes (11) are arranged in the side wall of the outer cylinder (3), a flow resistance ring (13) is fixedly arranged outside the outer cylinder (3), the flow resistance ring (13) is higher than the air inlet holes (11), and the flow resistance ring (13) is matched with the drill string in a gap mode.

[0012] Further, the joint is a tapered joint with a screw thread.

[0013] Further, the air inlet holes (11) are circular, elliptical, square or rectangular in shape, the number of the air inlet holes (11) is 4-6, the air inlet holes (11) are uniformly distributed along the outer cylinder (3), and the openings of the air inlet holes (11) are inclined upward.

[0014] Further, the flow resistance ring (13) has an outer diameter slightly smaller than an inner diameter of the drill string, has a connecting screw thread inside, and is made of rubber or steel; the upper end of the outer cylinder (3) is provided with an outer screw thread, and the flow resistance ring (13) is threadedly connected with the outer cylinder (3).

[0015] Further, the device further comprises a braking mechanism, and the braking mechanism comprises:

[0016] a propeller (1), a main pull rod (4) and an upper support (2);

[0017] The upper end of the outer cylinder (3) is fixedly provided with the upper support (2), a main pull rod (4) is fixedly arranged above the upper support (2) in a central mode, and a propeller (1) is rotatably arranged at the upper end of the main pull rod (4).

[0018] Further, the device further comprises a braking mechanism, and the braking mechanism comprises:

[0019] a propeller (1), a main pull rod (4), an inclined pull rod (6), a support rod (8), an upper support (2) and a palm (7);

[0020] The upper end of the outer cylinder (3) is fixedly provided with the upper support (2), a main pull rod (4) is fixedly arranged above the upper support (2) in a central mode, and a propeller (1) is rotatably arranged at the upper end of the main pull rod (4). An axial limiting piece (14) is fixedly arranged on the upper part of the main pull rod (4) close to the propeller (1), one end of the support rod (8) is hingedly connected with the lower end of the main pull rod (4), the other end of the support rod (8) extends obliquely upward and passes through a slide hole (9) and is provided with a palm (7).

[0021] The slide through hole (9) is arranged on the side wall of the outer cylinder (3), and the end of the main pull rod (4) is provided with a cap (10).

[0022] Further, the support rods (8) are symmetrically arranged in pairs.

[0023] Further, the support rods (8) are 4-6 groups.

[0024] Further, the palm (7) is provided with uneven patterns on the outer surface, a circular hole in the middle, and a connecting thread in the circular hole.

[0025] Further, the cap (10) is a stepped structure, the lower end is a cover plate, the middle is a cylinder with a circular hole, and the upper end is a cylinder with a connecting thread.

[0026] The beneficial effects of the present application are:

[0027] (1) When the electronic inclinometer instrument for gas drilling is measured, the free falling speed and impact force of the measuring instrument can be greatly reduced, thereby effectively protecting the inclinometer instrument and reducing the risk of gas drilling construction;

[0028] (2) It is convenient for the on-site technical personnel to operate, simplifies the inclinometer process flow of gas drilling, and can realize continuous measurement of the well trajectory of gas drilling;

[0029] (3) The structure is simple, the performance is stable, the cost is low, and the on-site application is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of an electronic inclinometer instrument measuring protection device suitable for gas drilling of the present application;

[0031] Figure 2 is a schematic view of the A direction of the propeller 1 of the electronic inclinometer instrument measuring protection device suitable for gas drilling of the present application;

[0032] Figure 3 is a schematic view of the B-B cross-sectional structure of the electronic inclinometer instrument measuring protection device suitable for gas drilling of the present application;

[0033] Figure 4 is a schematic view of the C direction of the palm 7 and the support rod 8 of the electronic inclinometer instrument measuring protection device suitable for gas drilling of the present application;

[0034] Figure 5 is a schematic view of the upper support 2 and the lower support 5 of the electronic inclinometer instrument measuring protection device suitable for gas drilling of the present application;

[0035] In the drawings:

[0036] 1, propeller, 2, upper support, 3, outer cylinder, 4, main pull rod, 5, lower support, 6, inclined pull rod, 7, palm, 8, support rod, 9, slide hole, 10, cap, 11, air inlet hole, 12, fishing spear, 13, flow resistance ring, 14, axial limiting piece. DETAILED DESCRIPTION

[0037] The application will be further described below with reference to the accompanying drawings:

[0038] Example one:

[0039] Appendix Figure 1 Appendix Figure 5 In the present application, an electronic inclinometer instrument is used for gas drilling, and a protection device is provided, which comprises a propeller 1, an upper support 2, an outer cylinder 3, a main pull rod 4, an air inlet hole 11 and a flow resistance ring 13.

[0040] The outer cylinder 3 is a cylindrical hollow cylinder with a diameter smaller than that of the drill string, and the top of the cylinder is designed in an open type. The lower end of the cylinder is provided with a joint for connecting the electronic inclinometer instrument. The joint is a tapered joint with a thread. The side wall of the outer cylinder 3 is provided with an air inlet hole 11. The outer cylinder 3 is externally provided with a flow resistance ring 13, which is higher than the air inlet hole 11. The flow resistance ring 13 is in clearance fit with the drill string. The inner diameter of the flow resistance ring 13 is in threaded connection with the outer cylinder 3. The material of the flow resistance ring 13 is rubber or steel. The upper end of the outer cylinder 3 is provided with an external thread. The flow resistance ring 13 is in threaded connection with the outer cylinder 3. The outer diameter of the flow resistance ring 13 is close to the diameter of the drill string.

[0041] The upper support 2 is fixedly arranged on the top of the outer cylinder 3. The upper support 2 is of a hollow structure, which does not affect the outflow of the gas flow in the outer cylinder 3.

[0042] The main pull rod 4 is centrally fixed above the upper support 2, and the top end of the main pull rod 4 is connected with a fishing spear 12.

[0043] The flow resistance ring 13 blocks the flow of the gas flow in the annular space between the outer cylinder 3 and the drill string, so that most of the gas flow flows out through the air inlet hole 11 and the outer cylinder 3. Since the air inlet hole 11 is arranged on the side wall of the outer cylinder 3, the flow of the gas flow is effectively slowed down, and the falling speed of the device is further slowed down. The falling speed can be adjusted by changing the number and size of the air inlet hole 11.

[0044] The shape of the air inlet hole 11 is circular, oval, square or rectangular. The number of the air inlet hole 11 is 4-6, which is uniformly distributed along the outer cylinder 3. The opening is an upwardly inclined slope.

[0045] Example two:

[0046] Appendix Figure 1 Appendix Figure 5In this paper, an electronic directional measuring instrument deployment and protection device suitable for gas drilling is composed of a propeller 1, an upper support 2, an outer cylinder 3, a main tie rod 4, an air inlet 11, a flow-blocking ring 13, and a braking mechanism.

[0047] The outer cylinder 3 is a hollow cylindrical body with a diameter smaller than that of the drill string. The top of the cylinder is open, and the lower end is provided with a connector for connecting an electronic inclinometer. The connector is a threaded tapered connector. An air inlet 11 is provided on the side wall of the outer cylinder 3. A flow-blocking ring 13 is fixedly sleeved on the outside of the outer cylinder 3. The flow-blocking ring 13 is higher than the air inlet 11. The flow-blocking ring 13 is clearance-fitted with the drill string. The inner diameter of the flow-blocking ring 13 is threaded to the outer cylinder 3. The material is rubber or steel. The upper end of the outer cylinder 3 is provided with an external thread. The outer diameter of the flow-blocking ring 13 is close to the diameter of the drill string.

[0048] The upper support 2 is fixed to the top of the outer cylinder 3. The upper support 2 has a hollow structure and does not affect the airflow out of the outer cylinder 3.

[0049] The flow-blocking ring 13 serves to block the airflow in the annulus between the outer cylinder 3 and the drill string, so that most of the airflow flows out through the air inlet 11 and the outer cylinder 3. Since the air inlet 11 is located on the side wall of the outer cylinder 3, it effectively slows down the airflow and thus slows down the falling speed of the device. The falling speed can also be adjusted by changing the number and size of the air inlets 11.

[0050] The air inlet 11 is circular, elliptical, square or rectangular in shape, and there are 4 to 6 of them. They are evenly distributed along the outer cylinder 3 and the opening is an upward sloping surface.

[0051] The braking mechanism consists of a propeller 1 and a main tie rod 4;

[0052] A main tie rod 4 is fixedly mounted in the center above the upper support 2, and a propeller 1 is rotatably mounted on the upper end of the main tie rod 4.

[0053] This embodiment further improves the buffering effect through the braking mechanism.

[0054] Example 3:

[0055] Appendix Figure 1 ~Appendix Figure 5 In this paper, an electronic directional measuring instrument deployment and protection device suitable for gas drilling is composed of a propeller 1, an upper support 2, an outer cylinder 3, a main tie rod 4, an air inlet 11, a flow-blocking ring 13, and a braking mechanism.

[0056] The upper support 2 is fixed to the top of the outer cylinder 3. The upper support 2 has a hollow structure and does not affect the airflow out of the outer cylinder 3.

[0057] The outer cylinder 3 is a cylindrical, hollow cylinder with a smaller diameter than the drill string, with an open top and a lower end with a joint for connecting to the electronic inclinometer, the joint being a tapered joint with a thread, the outer cylinder 3 having an air inlet hole 11 in the side wall, the outer cylinder 3 having a flow resistance ring 13 fixed to the outside, the flow resistance ring 13 being higher than the air inlet hole 11, the flow resistance ring 13 being in clearance fit with the drill string, the flow resistance ring 13 having an inner diameter that is threadedly connected to the outer cylinder 3, the material being rubber or steel, the outer cylinder 3 having an external thread at the upper end, the flow resistance ring 13 being threadedly connected to the outer cylinder 3, the outer diameter of the flow resistance ring 13 being close to the diameter of the drill string.

[0058] The flow resistance ring 13 blocks the flow of gas in the annulus between the outer cylinder 3 and the drill string, so that most of the gas flow passes through the air inlet hole 11 and out of the outer cylinder 3, since the air inlet hole 11 is provided in the side wall of the outer cylinder 3, effectively slowing down the flow of gas, thereby slowing down the falling speed of the device, and by changing the number and size of the air inlet hole 11, the appropriate falling speed can be adjusted.

[0059] The shape of the air inlet hole 11 is circular, oval, square or rectangular, the number is 4-6, and it is uniformly distributed along the outer cylinder 3, the opening is an upwardly inclined slope.

[0060] The brake mechanism is composed of a propeller 1, a main pull rod 4, an inclined pull rod 6, a support rod 8, an upper bracket 2, a lower bracket 5, a cap 10 and a palm 7.

[0061] The fishing spear 12, the propeller 1, the axial limiting member 14, the support rod 8 and the cap 10 are arranged from top to bottom on the main pull rod 4.

[0062] The fishing spear 12 is connected to the top end of the main pull rod 4, the propeller 1 is rotatably arranged on the upper end of the main pull rod 4 through a bearing, the axial limiting member 14 is fixedly sleeved on the main pull rod 4 below the propeller 1, and the axial limiting member 14 is in axial limiting fit with the upper bracket 2, so that the propeller 1 rotates above the upper bracket 2.

[0063] One end of the support rod 8 is hingedly connected to the lower end of the main pull rod 4, and the other end extends obliquely upward through the slide hole 9 and is connected with the palm 7.

[0064] The slide hole 9 is arranged in the side wall of the outer cylinder 3, and the end of the main pull rod 4 is provided with the cap 10.

[0065] The support rod 8 is symmetrically arranged in pairs.

[0066] The support rod 8 is 4-6 groups.

[0067] The palm 7 has a rough pattern on the outer surface, a circular hole in the middle, and a connecting thread in the circular hole.

[0068] The cap 10 is a stepped structure, the lower end is a cover plate, the middle is a cylinder with a round hole, and the upper end is a cylinder with a connecting thread connected to the end of the main pull rod 4.

[0069] The use method of the present application is:

[0070] During gas drilling, when it is necessary to continuously measure the well trajectory of the borehole, the measuring instrument is freely dropped using the measuring and protecting device, and the measuring instrument can work normally after reaching the bottom of the well. The specific working process is as follows:

[0071] First, the electronic multi-point inclinometer instrument is connected with the lower end tapered joint of the measuring and protecting device through a thread on the ground, and then is put into the drill string.

[0072] When the measuring instrument falls in free fall, the flow resistance ring 13 blocks the annulus, on the one hand, the friction between the flow resistance ring 13 and the drill string can generate an upward resistance to slow down the falling speed of the instrument, and at the same time, most of the gas enters the inner cavity of the outer cylinder 3 through the gas inlet hole 11;

[0073] Then, the airflow drives the propeller 1 to start rotating, generating an upward thrust and slowing down the falling of the instrument, and at the same time, driving the main pull rod 4 to move upward;

[0074] Then, the main pull rod 4 drives the support rod 8 to extend outward through the slide hole 9 by hinging, when extending to the inner wall of the drill string, the palm 7 contacts the inner wall of the drill string to generate an upward resistance, further slowing down the falling of the instrument.

[0075] During the measuring instrument dropping process of gas drilling, the rotating thrust and friction resistance generated by the flow resistance ring 13, the propeller 1 and the palm 7 can greatly slow down the falling speed of the electronic inclinometer instrument, and when the falling speed of the inclinometer instrument is fast, the size of the resultant force of the thrust and the resistance will also increase significantly, so as to effectively protect the inclinometer instrument and reduce the risk of gas drilling construction.

[0076] Finally, when the electronic multi-point inclinometer instrument reaches the bottom of the well and works normally, it can be lifted to the ground with the drill assembly, or it can be lowered into the fishing device through the steel wire rope, connected with the fishing spear 12 and lifted to the ground, so as to complete the measurement of the borehole trajectory data in the gas drilling process.

[0077] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An electronic survey instrument drop protection device suitable for use in gas drilling, characterized by, The application relates to a cylindrical and hollow outer cylinder (3) with a diameter smaller than a drill string, wherein the outer cylinder (3) is open at the upper end and closed at the lower end, the lower end is provided with a joint for connecting an electronic inclinometer, a side wall of the outer cylinder (3) is provided with air inlet holes (11), a choke ring (13) is fixedly arranged outside the outer cylinder (3), the choke ring (13) is higher than the air inlet holes (11) and gaps between the choke ring (13) and the drill string; the air inlet holes (11) are circular, elliptical, square or rectangular in shape, the number of the air inlet holes (11) is 4-6, the air inlet holes (11) are uniformly distributed along the outer cylinder (3) and are inclined upward; the choke ring (13) has an outer diameter slightly smaller than the inner diameter of the drill string, the choke ring (13) is internally provided with a connecting thread and is made of rubber or steel; the upper end of the outer cylinder (3) is provided with an external thread, and the choke ring (13) is threadedly connected with the outer cylinder (3); The application further relates to a brake mechanism comprising: A propeller (1), a main pull rod (4), an inclined pull rod (6), a support rod (8), an upper support (2) and a palm (7); The upper end of the outer cylinder (3) is fixedly provided with the upper support (2), the upper support (2) is axially and centrally provided with the main pull rod (4), the upper end of the main pull rod (4) is rotatably provided with the propeller (1), the upper part of the main pull rod (4) close to the propeller (1) is fixedly provided with an axial limiting piece (14), one end of the support rod (8) is hingedly connected with the lower end of the main pull rod (4), the other end of the support rod (8) extends upwardly and is provided with the palm (7) and passes through a slide hole (9); the slide hole (9) is arranged in the side wall of the outer cylinder (3), the tail end of the main pull rod (4) is provided with a cap (10); the palm (7) is provided with uneven patterns on the outer surface, a circular hole is arranged in the middle of the palm (7), the circular hole is internally provided with a connecting thread; the cap (10) is a stepped structure, the lower end of the cap (10) is a cover plate, the middle of the cap (10) is a cylindrical part with a circular hole, and the upper end of the cap (10) is a cylindrical part with a connecting thread.

2. The electronic surveying instrument launching and protecting device suitable for gas drilling according to claim 1, characterized in that, The joint is a tapered joint with a thread.

3. The electronic surveying instrument launching and protecting device suitable for gas drilling according to claim 2, characterized in that, The support rods (8) are symmetrically arranged in pairs.

4. The electronic surveying instrument launching and protecting device suitable for gas drilling according to claim 3, characterized in that, The support rods (8) are 4-6 groups. The support rods (8) are 4-6 groups.

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