Sitting key pulse device

Abstract

The utility model provides a setting key pulse device which comprises a setting key cylinder, a key channel formed in the setting key cylinder and a key which is connected with an underground instrument and extends to penetrate through the key channel, a fishing head used for being connected with a fishing tool in a clamping mode is arranged at the top end of the key, and the fishing head is connected with the setting key cylinder. The key setting pulse device further comprises a plurality of slurry circulating channels which penetrate through the key setting barrel and allow slurry to pass through, and the fishing head is constructed to be capable of driving the key setting barrel to synchronously move upwards under the action of the fishing tool, so that the slurry is allowed to move downwards through the slurry circulating channels.

Description

Technical Field

[0001] The utility model relates to the field of measurement while drilling, and particularly relates to a key setting pulse device. Background Art

[0002] At present, the measurement while drilling system is the most commonly used downhole tool in the process of oil drilling, and the pulse device is an important component of the measurement while drilling system. Due to the complex downhole environment, the pulse device may have problems such as no signal and instrument damage in the well, which forces the drill pipe to be lifted out until the pulse device is fished out, and then replacement or maintenance is carried out. This process causes high labor intensity, low efficiency, and consumes a large amount of production time.

[0003] CN2744827 discloses a downhole fishing tool used in oilfield workover operations. The device consists of an upper joint, a spear rod, a latch, a slip, a lock block, fixing screws, and connecting screws. Since the spear rod is designed with a latch groove and the slip is connected with a latch, under the action of a downward impact force, the latch arm on the latch can be stuck in the latch groove, thereby fixing the slip and separating it from the inner wall of the fallen object. This device can only fish out the instrument and is usually used when a stuck drill accident occurs during drilling, and it cannot meet the requirements of fishing work without stopping the well.

[0004] Therefore, in this field, it is desired to provide a key setting pulse device that can carry out fishing and replacement work without stopping the well, thereby effectively saving time and production costs, and further avoiding problems such as inability to fish or no signal caused by instrument damage. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a key setting pulse device that can carry out fishing work on the key setting cylinder through a fishing tool without stopping the well, thereby overcoming the drawbacks of the prior art that require stopping drilling for fishing or cannot be used for secondary operation.

[0006] According to a first aspect of the utility model, there is provided a key setting pulse device, including a key setting cylinder, a key channel formed in the key setting cylinder, and a key connected to a downhole instrument and extending through the key channel.

[0007] Wherein, a fishing head for clamping with a fishing tool is provided at the top of the key, and the key setting pulse device further includes a plurality of mud circulation channels penetrating the key setting cylinder and allowing mud to pass through.

[0008] The fishing head is configured to be able to drive the key setting cylinder to move upward synchronously under the action of the fishing tool, so as to allow the mud to flow downward through the mud circulation channels.

[0009] In one embodiment, the setting key pulse device further includes a diversion ring disposed on the upper end surface of the setting key cylinder, and a through groove for restricting the movement path of the key is formed in the middle of the diversion ring.

[0010] In one embodiment, a plurality of diversion holes for allowing mud to enter and arranged around the through groove are further provided on the diversion ring, and the diversion holes are axially aligned with the mud circulation channel.

[0011] In one embodiment, the diversion hole is configured as either a circular hole or a square hole.

[0012] In one embodiment, the fishing head includes a guiding portion configured as a conical structure and a fishing portion configured as a columnar structure disposed below the guiding portion.

[0013] In one embodiment, wear-resistant layers are provided on the outer walls of both the guiding portion and the fishing portion, and the wear-resistant layers are configured as oxide metal plasma coatings.

[0014] In one embodiment, the key is configured as a stepped cylinder structure and includes a first cylinder and a second cylinder for abutting against the diversion ring, wherein the diameter of the first cylinder is smaller than that of the second cylinder.

[0015] In one embodiment, a positioning seat for restricting the movement path of the fishing tool is sleeved on the first cylinder.

[0016] In one embodiment, the setting key pulse device further includes a first sealing portion fixed to the lower end surface of the diversion ring and for abutting against the second cylinder, and a second sealing portion concentrically arranged in the annulus between the setting key cylinder and the second cylinder, and the lower end surface of the second sealing portion is flush with the lower end surface of the setting key cylinder.

[0017] In one embodiment, a positioning body made of a magnetic material is provided inside the fishing head.

[0018] The fishing tool includes fishing claws, an electromagnet disposed inside the fishing claws and adapted to the positioning body, and a motor connected to the fishing claws, wherein after the fishing claws are energized, the positioning body can be attracted by the electromagnet.

[0019] Compared with the prior art, the advantages of the present utility model are as follows:

[0020] First, the utility model can salvage the key - setting cylinder through a fishing tool without stopping the well, thus overcoming the drawbacks of the prior art that require drilling suspension for fishing or cannot be reused for operation. Preferably, when the key - setting cylinder moves upward under the pulling action of the fishing tool, the mud can flow downward through the diversion hole and the mud circulation channel in sequence. Therefore, when the key - setting cylinder moves upward, the mud can still carry out the well - inner circulation work to further ensure that the device can carry out the fishing work without stopping the well.

[0021] Second, the utility model effectively solves the problem that the instrument cannot continue to measure due to the release of the buckle caused by excessive well deviation or too fast drilling speed through the upper - suspension structure (i.e., installed above the downhole instrument). In addition, since the key - setting pulse device and the suspension sub - section are assembled into a kit for use, it has the advantages of being easy to disassemble, install and salvage, making the overall design concept simple and shortening the production cycle, which is convenient for the fishing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present utility model will be described in detail below with reference to the drawings. In the drawings:

[0023] Figure 1 Schematically shows the structure of the key - setting pulse device according to the present utility model;

[0024] Figure 2 is Figure 1 the top - view of

[0025] Figure 3 Schematically shows the upward state of the key - setting pulse device according to the present utility model.

[0026] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the technical solutions and advantages of the present utility model clearer and more understandable, the exemplary embodiments of the present utility model will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than an exhaustive list of all embodiments. And without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0028] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0029] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components.

[0030] For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] The present utility model will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 Schematically shows the structure of the sitting key pulse device according to the present utility model;

[0033] Figure 2 For Figure 1 the top view;

[0034] Figure 3 Schematically shows the upward state of the sitting key pulse device according to the present utility model.

[0035] As Figure 1 and 3 shown, according to the first aspect of the present utility model, a sitting key pulse device is provided, which includes a sitting key barrel 11 and a key. Preferably, the downstream end of the key is connected to the downhole instrument 200, and the upstream end of the key can extend out of the sitting key barrel 11. In the present utility model, a fishing head 12 is further provided at the upstream end of the key.

[0036] Preferably, after the fishing tool is lowered, the fishing tool can form a clamping connection with the fishing head 12, so that the entire sitting key barrel 11 can be lifted out through the fishing head 12 without stopping the well, which further helps to complete the replacement work of the sitting key pulse device, thereby further saving time and production costs, and its content will be introduced below.

[0037] In an embodiment of the present utility model, as Figure 1 and 3 shown, the sitting key pulse device further includes a plurality of mud circulation channels 112 penetrating through the sitting key barrel 11. Preferably, when the sitting key barrel 11 moves upward under the pulling action of the fishing tool, the mud can flow from top to bottom through the mud circulation channels 112, so that the mud can still perform the well circulation work when the sitting key pulse device moves upward, so as to further ensure that the device can perform the fishing work without stopping the well.

[0038] In the present utility model, the fishing head 12 can form a firm clamping connection with the fishing tool and can drive the key setting cylinder 11 to move upward together. At the same time, the mud will also smoothly move downward through the mud circulation channel 112 to further ensure that the mud can perform continuous circulation work.

[0039] According to the present utility model, as Figures 1 to 3 shown, the key setting pulse device further includes a diversion ring 13 provided on the upper end surface of the key setting cylinder 11. Preferably, the diversion ring 13 and the key setting cylinder 11 are detachably connected, so that during the fishing process, the key setting cylinder 11, the key and the fishing tool can be more easily matched to ensure that the fishing work can be carried out smoothly.

[0040] In one embodiment, as Figures 1 to 3 shown, a through groove 131 for restricting the movement path of the key is formed in the middle of the diversion ring 13. In the present utility model, the key is configured as a stepped cylinder structure and includes a first cylinder 21 with a smaller diameter and a second cylinder 22 with a larger diameter.

[0041] Preferably, a sealed connection is formed between the outer peripheral surface of the first cylinder 21 and the inner peripheral surface of the through groove 131. Therefore, during the fishing process, the mud can only move downward through the diversion hole 132 (introduced below) and the mud circulation channel 112 in sequence.

[0042] Preferably, the second cylinder 22 has a clearance fit with the key channel 111, and the outer diameter of the second cylinder 22 is larger than the diameter of the through groove 131. Therefore, during the fishing process, the second cylinder 22 will axially abut against the diversion ring 13, so that under the pulling action of the fishing tool, the key and the key setting cylinder 11 can move upward synchronously to smoothly lift out the key setting pulse device, which is helpful for subsequent replacement work.

[0043] In one embodiment, as Figures 1 to 3 shown, a plurality of diversion holes 132 allowing the mud to enter are further provided on the diversion ring 13. Preferably, the plurality of diversion holes 132 are all arranged around the through groove 131, and the number of the diversion holes 132 is not less than the number of the mud circulation channels 112. It should be noted that each mud circulation channel 112 will be axially aligned with a diversion hole 132 to form a channel allowing the mud to move downward from top to bottom, so as to ensure that the mud can still perform continuous circulation work during the fishing process.

[0044] In one embodiment of the present utility model, the diversion hole 132 is configured as either a circular hole or a square hole. In this way, the passing speed of the mud can be effectively increased, thereby reducing the obstruction during the upward movement of the key setting pulse device and further increasing the replacement success rate of the key setting pulse device.

[0045] However, in other embodiments of the present utility model, the diversion hole 132 can also be configured in other shapes.

[0046] In an embodiment of the present utility model, as Figure 1 and 3 shown, a positioning seat 14 for restricting the movement path of the fishing tool is sleeved on the first cylinder 21. Preferably, due to the complex downhole environment, it is usually impossible to directly and accurately determine whether the fishing tool is successfully clamped after contacting the fishing head 12, which will undoubtedly increase the situation of fishing failure.

[0047] In this application, by providing the positioning seat 14 on the first cylinder 21, when the fishing tool can extend downward until it axially abuts against the positioning seat 14, it can be smoothly clamped with the fishing head 12 by pulling back. In this way, it can help to judge the clamping state between the fishing tool and the fishing head 12, thereby improving the success rate of the fishing keying pulse device and further overcoming various problems brought by the complex downhole operation environment.

[0048] In addition, since the downstream end of the key is connected to the downhole instrument 200, the axial abutment of the positioning seat 14 with the keying cylinder 11 can also effectively limit the downward travel distance of the key, thus contributing to the subsequent fishing work.

[0049] In an embodiment, as Figure 1 and 3 shown, the fishing head 12 includes a guiding portion 121 configured as a conical structure and a fishing portion 122 configured as a columnar structure disposed between the guiding portion 121 and the first cylinder 21. Preferably, the cross-sectional area of the guiding portion 121 gradually increases in the direction of the fishing portion 122, and the maximum cross-sectional area of the guiding portion 121 is equal to the cross-sectional area of the fishing portion 122. It is easy to understand that during the fishing process, the fishing tool can first expand outward through the guiding portion 121 and then form a clamping connection with the lower end surface of the fishing portion 122 when passing over the fishing portion 122.

[0050] In an embodiment of the present utility model, wear-resistant layers are provided on the outer walls of both the guiding portion 121 and the fishing portion 122. Preferably, the wear-resistant layer is configured as an oxide metal plasma coating. Thus, during the fishing process, it can not only avoid the situation of slipping or sliding when the fishing tool contacts the fishing head 12, but also avoid the wear caused by the contact and collision between the fishing tool and the fishing head 12, thereby effectively ensuring the use safety of the keying pulse device and the stability of the fishing process.

[0051] In an embodiment, as Figure 1 and 3As shown, the setting key pulse device further includes a first sealing portion 15. Preferably, the first sealing portion 15 is fixed at the lower end surface of the diversion ring 13 and can axially abut against the second cylinder 22 during fishing, thereby playing a good sealing role. Preferably, the first sealing portion 15 is configured as an annular structure and sleeved outside the first cylinder 21.

[0052] In one embodiment, as Figure 1 and 3 shown, the setting key pulse device further includes a second sealing portion 16 disposed below the first sealing portion 15. Preferably, the second sealing portion 16 is configured as an annular structure and concentrically arranged in the annulus between the setting key cylinder 11 and the second cylinder 22, thereby being able to play a certain role in straightening the second cylinder 22.

[0053] Preferably, the second sealing portion 16 is composed of at least two sealing rings that abut against each other or are spaced apart from each other, and the lower end surface of the lowermost sealing ring is flush with the lower end surface of the setting key cylinder 11.

[0054] Preferably, a suspension nipple 30 is further provided outside the setting key pulse device. In other words, after assembling the setting key pulse device and the suspension nipple 30 into a kit, it is fixed in the drill collar, which helps the subsequent fishing operation.

[0055] It should be noted that the present utility model effectively solves the problem that the instrument cannot continue to measure due to the release of the buckle caused by excessive well deviation or too fast drilling speed through the upper suspension structure (i.e., installed above the downhole instrument 200).

[0056] Due to the complex downhole environment, it is easy to occur fishing failure situations such as misalignment and deviation between the fishing device and the fishing head. To better ensure a successful fishing operation at one time and reduce costs, the present utility model adopts a magnetic positioning fishing technology, and the specific content is as follows:

[0057] A positioning body is provided in the fishing head 12. Preferably, the positioning body accounts for one-third of the fishing head 12, and the positioning body is made of a magnetic material. In the present utility model, the fishing tool includes fishing claws, an electromagnet disposed in the fishing claws and adapted to the positioning body, and a motor connected to the fishing claws. Therefore, after the fishing claws are energized, the positioning body can be more easily attracted by the electromagnet, further improving the fishing efficiency and the fishing success rate.

[0058] In other words, when the fishing tool moves downward to perform fishing, the electromagnet in the fishing claws is energized by the motor, so as to effectively attract the positioning body in the fishing head 12, so as to promote the fishing claws and the fishing head 12 to be in the same axial direction, further achieving the purpose of preventing the fishing position from skewing or unhooking.

[0059] Compared with the prior art, the present utility model has the following advantages:

[0060] First, the utility model can salvage the setting key barrel 11 through a fishing tool without stopping the well, thus overcoming the drawbacks of the prior art that require stopping drilling for fishing or cannot be reused for operation. Preferably, when the setting key barrel 11 moves upward under the pulling action of the fishing tool, the mud can flow downward through the diversion hole 132 and the mud circulation channel 112 in sequence. Therefore, when the setting key barrel 11 moves upward, the mud can still carry out the well-internal circulation work to further ensure that the device can carry out the fishing work without stopping the well.

[0061] Second, the utility model effectively solves the problem that continuous measurement cannot be carried out due to the release of the instrument caused by excessive well deviation or too fast drilling speed through the upper suspension structure (i.e., installed above the downhole instrument 200). In addition, since the setting key pulse device and the suspension sub 30 are assembled into a kit for use, it has the advantages of easy disassembly and fishing, making the overall design concept simple and shortening the production cycle, which is convenient for fishing operations.

[0062] The above is only the preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art can easily make changes or variations within the disclosure scope of the utility model, and such changes or variations should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the protection scope of the claims.

Claims

1. A sitting key pulse device, characterized in that, It includes a setting key barrel (11), a key channel (111) formed within the setting key barrel (11), and a key connected to a downhole instrument (200) and extending through the key channel (111). Wherein, a fishing head (12) for engaging with a fishing tool is provided at the top end of the key. The setting key pulse device further includes a plurality of mud circulation channels (112) penetrating the setting key barrel (11) and allowing mud to pass through. The fishing head (12) is configured to be able to drive the setting key barrel (11) to move upward synchronously under the action of the fishing tool, so as to allow the mud to flow downward through the mud circulation channels (112).

2. The sitting key pulse device according to claim 1, characterized in that, The setting key pulse device further includes a flow guiding ring (13) provided on the upper end surface of the setting key barrel (11). A through groove (131) for restricting the movement path of the key is formed at the middle of the flow guiding ring (13).

3. The sitting key pulse device according to claim 2, characterized in that, A plurality of flow guiding holes (132) for allowing mud to enter are also provided on the flow guiding ring (13) and arranged around the through groove (131). The flow guiding holes (132) are axially aligned with the mud circulation channels (112).

4. The sitting key pulse device according to claim 3, characterized in that, The flow guiding holes (132) are configured as either circular holes or square holes.

5. The sitting key pulse device according to any one of claims 2 to 4, characterized in that The fishing head (12) includes a guiding portion (121) configured as a conical structure and a fishing portion (122) configured as a cylindrical structure provided below the guiding portion (121).

6. The sitting key pulse device according to claim 5, characterized in that, Wear-resistant layers are provided on the outer walls of the guiding portion (121) and the fishing portion (122). The wear-resistant layers are configured as oxide metal plasma coatings.

7. The sitting key pulse device according to any one of claims 2 to 4, characterized in that, The key is configured as a stepped cylinder structure and includes a first cylinder (21) and a second cylinder (22) for abutting against the flow guiding ring (13). Wherein, the diameter of the first cylinder (21) is smaller than that of the second cylinder (22).

8. The sitting key pulse device according to claim 7, characterized in that, A positioning seat (14) for restricting the movement path of the fishing tool is sleeved on the first cylinder (21).

9. The sitting key pulse device according to claim 8, characterized in that, The setting key pulse device further includes a first sealing portion fixed to the lower end surface of the flow guiding ring (13) and used for abutting against the second cylinder (22), and a second sealing portion concentrically arranged in the annulus between the setting key barrel (11) and the second cylinder (22). The lower end surface of the second sealing portion is flush with the lower end surface of the setting key barrel (11).

10. The sitting key pulse device according to claim 1, characterized in that, A positioning body made of a magnetic material is provided inside the fishing head (12). The fishing tool includes fishing claws, an electromagnet provided inside the fishing claws and adapted to the positioning body, and a motor connected to the fishing claws. Wherein, after the fishing claws are energized, the positioning body can be attracted by the electromagnet.

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