CN115898311A - MWD (measurement while drilling) open hole fishing tool and using method - Google Patents
MWD (measurement while drilling) open hole fishing tool and using method Download PDFInfo
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- CN115898311A CN115898311A CN202211497969.5A CN202211497969A CN115898311A CN 115898311 A CN115898311 A CN 115898311A CN 202211497969 A CN202211497969 A CN 202211497969A CN 115898311 A CN115898311 A CN 115898311A
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Abstract
The invention discloses an MWD (measurement while drilling) bare hole fishing tool and a using method thereof, belonging to the technical field of horizontal well drilling and being characterized in that: the MWD fishing device comprises a guide barrel, a lengthened barrel and a joint barrel, wherein one end of the guide barrel is connected with one end of the lengthened barrel, the other end of the lengthened barrel is connected with the joint barrel, and a joint device used for being connected with a fishing head of an MWD instrument is arranged in the joint barrel. The invention can ensure that the whole MWD instrument is not easily extruded by other external force during fishing, thereby reducing the probability of breakage of the MWD instrument and improving the fishing safety and success rate.
Description
Technical Field
The invention relates to the technical field of horizontal well drilling, in particular to an MWD (measurement while drilling) open hole fishing tool and a using method thereof.
Background
In the horizontal well, the inclined wells with the well inclination exceeding 90 degrees are more, the thickness of a target layer is only 3-5m, and the horizontal section exceeds 2500m. However, the frequent occurrence of stuck drilling during the drilling process is increased, the stuck drilling treatment time is long, the difficulty is high, and a plurality of downhole tools are buried, wherein MWD instruments, namely measurement while drilling instruments, are contained.
Because MWD instruments are expensive and have small outer diameters, the MWD instruments are easy to topple over on a well wall; the MWD fishing tool belongs to a precise instrument, is low in strength of used materials, small in pressure resistance and not easy to salvage, and a conventional fishing tool is used for salvaging through a manufacturing buckle or other forms, so that the MWD instrument is easily broken off, and the salvaging safety is poor.
Chinese patent document CN212079252U, published as 2020, 12 and 04 discloses a sit-key type MWD (measurement while drilling) bare hole fishing device, which is characterized by comprising a clamping cylinder assembly connected with a drill rod and used for clamping and setting fish, wherein the free end of the clamping cylinder assembly is detachably connected with a guide cylinder through an extension cylinder; the clamping cylinder assembly comprises a cylinder body connected with the lengthened cylinder, one end of the cylinder body, far away from the lengthened cylinder, is connected with a grabbing slip through a positioning bearing plate, and the positioning bearing plate is in key connection with the inner wall of the cylinder body; the lengthening cylinder is in threaded connection with the clamping cylinder assembly through internal threads, the lengthening cylinder is in threaded connection with the guide cylinder through external threads, and the thickness of the two end parts of the lengthening cylinder to the middle part of the lengthening cylinder is gradually increased.
According to the sitting-key MWD open hole fishing device disclosed by the patent document, the clamping cylinder assembly and the guide cylinder are detachably connected by adopting the lengthened cylinders with different lengths, so that the device is convenient to adapt to drilling wells with different depths to fish and salvage, and the application range is wide; after the fish is clamped and fixed by the clamping barrel assembly, the lengthening barrel is disconnected from the clamping barrel assembly, so that the fish can be conveniently taken out of the clamping barrel assembly; the length of the device is lengthened through the guide barrel, and meanwhile, the fallen fish in the drilling well can be guided into the clamping barrel assembly to be clamped and fixed. However, the whole MWD instrument is easily squeezed by other external forces, thereby increasing the probability of breakage of the MWD instrument, and affecting fishing safety and success rate.
Disclosure of Invention
The MWD bare hole fishing tool and the using method thereof can ensure that the whole MWD instrument is not easily extruded by other external force during fishing, thereby reducing the probability of breakage of the MWD instrument and improving the fishing safety and success rate.
The invention is realized by the following technical scheme:
the utility model provides a MWD bore hole fishing tool which characterized in that: the MWD fishing device is characterized by comprising a guide cylinder, a lengthened cylinder and a connector cylinder, wherein one end of the guide cylinder is connected with one end of the lengthened cylinder, the other end of the lengthened cylinder is connected with the connector cylinder, and a connector device used for being connected with a fishing head of an MWD instrument is arranged in the connector cylinder.
The connector device comprises a main body and a clamping device, wherein the clamping device is connected to one end of the main body and is used for being connected with a fishing head of the MWD instrument.
The clamping device comprises two slips which are symmetrically arranged, through grooves matched with the slips are symmetrically formed in two sides of the main body, the slips are located in the through grooves to slide, and the main body is further provided with a limiting device used for limiting the slips to move.
Stop device is first spring, the top of slips with the top that leads to the groove all is the inclined plane setting, and the middle part of main part winds first recess has been seted up to the main part round, and the second recess has been seted up at the slips middle part, sets up first spring in first recess and the second recess simultaneously.
Still include buffer gear, buffer gear includes guide rod and second spring, the guide rod through connect the base set up in connect a section of thick bamboo, the sliding tray has been seted up at the top of guide rod, the main part passes through the sliding tray and is in slide on the guide rod, set up the second spring between the bottom of guide rod and the main part.
The piecing devices still includes bullet card mechanism, and bullet card mechanism includes the go-between and sets up a plurality of billets on the go-between, and the billet encircles the go-between round sets up, and the billet is all incurved to form the chamber of snatching that is used for locking the fishing head of MWD instrument.
Still including supporting cavity and clamp head, the clamp head sets up in the inside of supporting the cavity, and bullet card mechanism sets up in the bottom of clamp head.
The one end that the bullet card mechanism was kept away from to the clamp head is provided with the clamp, and the clamp internal surface is provided with a plurality of archs.
The tails of the guide cylinder and the lengthening cylinder are provided with righting seats.
The use method of the MWD open hole fishing tool is characterized by comprising the following steps:
s01, a MWD (measurement while drilling) bare hole fishing tool is drilled down to a position 7-13m before the position where the MWD instrument of the fallen object exists;
s02, starting a slurry pump to circularly discharge oil gas, and simultaneously recording drilling parameters related to the suspended weight, the lifting friction resistance, the lowering friction resistance, the rotation resistance, the pump stroke and the pump pressure;
s03, starting to rotate the drilling tool, and lowering an MWD open hole fishing tool;
s04, when the pump pressure rises, continuously rotating and lowering the MWD open hole fishing tool by 10-15cm and observing the change of the pump pressure;
s05, if the pump pressure is continuously increased, pulling out the MWD open hole fishing tool;
and S06, if the pump pressure is not changed or reduced, sequentially repeating the steps S03, S04 and S05.
The beneficial effects of the invention are mainly shown in the following aspects:
1. according to the invention, one end of the guide cylinder is connected with one end of the lengthened cylinder, the other end of the lengthened cylinder is connected with the joint cylinder, and the joint device for connecting with the fishing head of the MWD instrument is arranged in the joint cylinder.
2. According to the MWD instrument fishing device, the guiding barrel, the lengthening barrel and the connector barrel can enable the fishing head of the MWD instrument to enter the inside of the guiding barrel, the guiding barrel is arranged at the front end, the lengthening barrel is arranged in the guiding barrel, the connector barrel is arranged at the tail end, adjacent parts can be connected through threads, a connector device connected with the fishing head of the MWD instrument is arranged in the connector barrel, and due to the fact that the guiding barrel, the lengthening barrel and the connector barrel support the MWD instrument, the MWD instrument is fixed in the connector barrel through the fishing head of the MWD instrument, the safety of the whole MWD instrument can be well protected in the fishing process, and the instrument is prevented from being damaged.
3. The fishing tool is reasonable in overall structural design, simple in structure and convenient to fish.
4. The whole fishing process is simple to operate, simple and easy to implement, and the fishing efficiency is greatly improved.
Drawings
The invention will be further described in detail with reference to the drawings and the detailed description, in which:
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic view of the main body of the present invention;
FIG. 3 is a schematic view of the centralizer of the present invention;
FIG. 4 is a schematic view of the installation of the body and slips of the present invention;
FIG. 5 is a top view of the invention of FIG. 4;
FIG. 6 is a schematic view of the slip construction of the present invention;
FIG. 7 is a schematic structural view of the fishing head of the present invention;
FIG. 8 is a schematic structural view of embodiment 3 of the present invention;
FIG. 9 is a schematic view of the card ejecting mechanism of the present invention;
FIG. 10 is another schematic structural view of embodiment 3 of the present invention;
FIG. 11 is a schematic view of the structure of the clamp of the present invention;
FIG. 12 is a schematic view of the structure of the chuck head of the present invention;
the labels in the figure are: 1. guide cylinder, 2, right seat, 3, extension section of thick bamboo, 4, main part, 5, guide bar, 6, second spring, 7, first recess, 8, logical groove, 9, connect a section of thick bamboo, 10, slips, 11, first spring, 12, second recess, 13, fishing head, 14, go-between, 15, bullet card mechanism, 16, clamp, 17, clamp head, 18, support cavity.
Detailed Description
Example 1
Referring to fig. 1-12, the MWD open hole fishing tool comprises a guide cylinder 1, an extension cylinder 3 and a connector cylinder 9, wherein the guide cylinder 1 is arranged at the head of the whole fishing tool, the extension cylinder 3 is arranged at the middle part, the connector cylinder 9 is arranged at the tail part, and the guide cylinder 1, the extension cylinder 3 and the connector cylinder are detachably connected through threads.
The guide cylinder 1, the lengthening cylinder 3 and the joint cylinder 9 are all of a hollow cylindrical structure, one end of the guide cylinder 1, which is far away from the lengthening cylinder 3, is larger in diameter than one end, which is connected with the lengthening cylinder 3, and the guide cylinder can better touch and guide the MWD instrument fishing head 13 to enter the guide cylinder 1 by adopting a cross section hook-shaped structure.
The length of the lengthened cylinder 3 is selected according to the length of an MWD instrument to be salvaged, the longer MWD instrument can be supported, the joint cylinder 9 is used for being connected with a drilling tool, the whole fishing tool is moved to the position of the MWD instrument by providing power through the drilling tool, a joint device is installed in the joint cylinder 9, the MWD instrument fishing head 13 is fixed through the joint device after the MWD instrument fishing head 13 enters the guide cylinder 1, the MWD instrument is further fixed, and the whole MWD instrument is taken out when the whole fishing device is pulled out.
The MWD instrument fishing head 13 is arranged in the connector barrel 9, a connector device connected with the MWD instrument fishing head 13 is installed inside the connector barrel 9, when the MWD instrument fishing head 13 is used, the whole device is drilled to a specified place to be fished, the MWD instrument fishing head 13 is pulled out under the guiding action into the guide barrel 1 in the fishing process, then the MWD instrument enters the guide barrel 1, the extension barrel 3 and the connector barrel 9 gradually through the MWD instrument fishing head 13, the MWD instrument fishing head 13 is connected with the connector device, and the whole device is pulled out.
In this embodiment, the guide cylinder 1 and the extension cylinder 3 afterbody all are provided with righting seat 2, because the size of MWD instrument can be with guide cylinder 1, the section of thick bamboo diameter of extension cylinder 3 and joint cylinder 9 is inconsistent, can add the section of thick bamboo 3 and collide repeatedly and rock in guide cylinder 1 when MWD instrument and fishing head 13 get into, be difficult to aim at the inside piecing devices of joint cylinder 9, thereby it is comparatively consuming time to lead to connecting work to develop, righting seat 2 mainly includes an annular structure, install a plurality of separation blade on annular structure, the shape of a circle is enclosed to the one end that annular structure was kept away from to a plurality of separation blades, be used for MWD instrument and fishing head 13 to pass through, aim at the piecing devices with the direction that MWD instrument and fishing head 13 got into.
Compared with the prior art, the method has the advantages that the basic implementation mode is adopted, the whole MWD instrument is not easily extruded by other external force during fishing, the probability that the MWD instrument is broken is reduced, and the fishing safety and success rate are improved.
Example 2
Referring to fig. 1-12, the MWD open hole fishing tool comprises a guide cylinder 1, an extension cylinder 3 and a connector cylinder 9, wherein the guide cylinder 1 is arranged at the head of the whole fishing tool, the extension cylinder 3 is arranged at the middle part, the connector cylinder 9 is arranged at the tail part, and the guide cylinder 1, the extension cylinder 3 and the connector cylinder are detachably connected through threads. The guide cylinder 1, the lengthened cylinder 3 and the joint cylinder 9 are all hollow cylindrical structures, the diameter of one end, far away from the lengthened cylinder 3, of the guide cylinder 1 is larger than that of one end connected with the lengthened cylinder 3, and a section hook-shaped structure is adopted, so that the MWD instrument fishing head 13 can be better touched and guided to enter the guide cylinder 1. The length of the lengthened cylinder 3 is selected according to the length of an MWD instrument to be fished, the lengthened MWD instrument can be supported, the connector cylinder 9 is used for being connected with a drilling tool, power is supplied through the drilling tool, the whole fishing tool moves to the position of the MWD instrument, a connector device is installed in the connector cylinder 9, the MWD instrument fishing head 13 is fixed through the connector device after the MWD instrument fishing head 13 enters the guide cylinder 1, the MWD instrument is further fixed, and the whole MWD instrument is taken out when the whole fishing device is pulled out. Guide 1 and 3 tails of a long section of thick bamboo all are provided with and right seat 2, because the size of MWD instrument can be with guide 1, the section of thick bamboo footpath nonconformity of a long section of thick bamboo 3 and joint drum 9 adds, can add long section of thick bamboo 3 and collide repeatedly in guide 1 when MWD instrument and fishing head 13 get into and rock, be difficult to aim at the inside piecing devices of joint drum 9, thereby it develops comparatively consuming time to lead to connecting work, right seat 2 mainly includes an annular structure, install a plurality of separation blade on annular structure, the one end that annular structure was kept away from to a plurality of separation blades encloses the shape of a circle, be used for MWD instrument and fishing head 13 to pass through, the piecing devices is aimed at with the direction that MWD instrument and fishing head 13 got into.
The connector device comprises a main body 4 and a clamping device, wherein the main body 4 is of a cylindrical structure, the interior of the main body is hollow, the main body is convenient to be connected with a fishing head 13 of the MWD instrument, and the clamping device is connected to one end of the main body 4 and used for being connected with the fishing head 13 of the MWD instrument.
More specifically, the clamping device comprises two symmetrically-arranged slips 10, through grooves 8 corresponding to the slips 10 are also formed in two sides of the main body 4, the slips 10 can move in the through grooves 8, a protrusion is arranged at the top of each slip 10, the distance between the initial positions of the two slips 10 is smaller than the diameter of the main body 4, the main body 4 is further provided with a limiting device used for limiting the movement of the slips 10, and the limiting device enables the slips 10 to return to the original position after being pushed by a fishing head 13 of an MWD (measurement while drilling) instrument, so that the purpose of locking the fishing head 13 of the MWD instrument is achieved.
Wherein, stop device includes first spring 11, and first recess 7 has been seted up around 4 rounds of main part in the middle part of main part 4, forms a space to the indent for place first spring 11, second recess 12 has been seted up at two slips 10 middle parts simultaneously, and the length of this second recess 12 is the same with the length of first spring 11, and first spring 11 is located first recess 7 and second recess 12 simultaneously, and the top of slips 10 and the top that leads to groove 8 all are the inclined plane setting.
When the MWD instrument fishing device is used, the fishing head 13 of the MWD instrument pushes the slips 10 on two sides to move towards a direction far away from the main body 4, the tops of the slips 10 and the top of the through groove 8 are arranged in an inclined plane, the slips 10 integrally start to move downwards, the top of the second groove 12 starts to press the first spring 11 downwards, the other end of the second spring 6 is limited in the first groove 7, the first spring 11 starts to be compressed under the extrusion of the second groove 12, and after the fishing head 13 of the MWD instrument is separated from the top of the slips 10, the first spring 11 releases the elastic force, so that the slips 10 are restored to the original position.
In addition, in order to prevent the pressure-sensitive adhesive tape from being broken due to overlarge bearing pressure, the pressure-sensitive adhesive tape further comprises a buffer mechanism, the buffer mechanism comprises a guide rod 5 and a second spring 6, the guide rod 5 is arranged in the joint barrel 9 through a connecting base, a through hole for communicating air pressure is formed in the connecting base, a sliding groove is formed in the bottom of the main body 4, the main body 4 slides on the guide rod 5 through the sliding groove, and the second spring 6 is arranged between the bottom of the guide rod 5 and the main body 4.
In another preferred embodiment, the guiding cylinder, the extension cylinder and the connector cylinder can allow the fishing head of the MWD tool to enter the inside of the MWD tool, the guiding cylinder is arranged at the front end, the extension cylinder is arranged in the middle, the connector cylinder is arranged at the tail end, adjacent components can be connected by threads, a connector device connected with the fishing head of the MWD tool is arranged in the connector cylinder, and the MWD tool is supported by the guiding cylinder, the extension cylinder and the connector cylinder and is fixed in the connector cylinder through the fishing head of the MWD tool, so that the safety of the whole MWD tool can be well protected during fishing, and the tool can be prevented from being damaged.
Example 3
Referring to fig. 1-12, the MWD open hole fishing tool comprises a guide cylinder 1, an extension cylinder 3 and a connector cylinder 9, wherein the guide cylinder 1 is arranged at the head of the whole fishing tool, the extension cylinder 3 is arranged at the middle part, the connector cylinder 9 is arranged at the tail part, and the guide cylinder 1, the extension cylinder 3 and the connector cylinder are detachably connected through threads. The guide cylinder 1, the lengthening cylinder 3 and the joint cylinder 9 are all of a hollow cylindrical structure, one end of the guide cylinder 1, which is far away from the lengthening cylinder 3, is larger in diameter than one end, which is connected with the lengthening cylinder 3, and the guide cylinder can better touch and guide the MWD instrument fishing head 13 to enter the guide cylinder 1 by adopting a cross section hook-shaped structure. The length of the lengthened cylinder 3 is selected according to the length of an MWD instrument to be fished, the lengthened MWD instrument can be supported, the connector cylinder 9 is used for being connected with a drilling tool, power is supplied through the drilling tool, the whole fishing tool moves to the position of the MWD instrument, a connector device is installed in the connector cylinder 9, the MWD instrument fishing head 13 is fixed through the connector device after the MWD instrument fishing head 13 enters the guide cylinder 1, the MWD instrument is further fixed, and the whole MWD instrument is taken out when the whole fishing device is pulled out. Guide 1 and 3 tails of a long section of thick bamboo all are provided with righting seat 2, because the size of MWD instrument can be with guide 1, the section of thick bamboo 3 and the section of thick bamboo footpath of joint section of thick bamboo 9 are inconsistent, can add long section of thick bamboo 3 and collide repeatedly and rock in guide 1 when MWD instrument and fishing head 13 get into, be difficult to aim at the inside piecing devices of joint section of thick bamboo 9, thereby it is comparatively consuming time to lead to connecting work to develop, righting seat 2 mainly includes an annular structure, install a plurality of separation blade on annular structure, the one end that annular structure was kept away from to a plurality of separation blades encloses the shape of a circle, a MWD instrument and fishing head 13 pass through, the direction alignment piecing devices that gets into with MWD instrument and fishing head 13.
Further, piecing devices includes bullet card mechanism 15, and bullet card mechanism 15 includes go-between 14 and sets up a plurality of billets on go-between 14, and the billet encircles 14 rounds of settings of go-between, and the billet is all incurved to form and is used for locking MWD instrument fishing head 13 and snatchs the chamber, and bullet card mechanism 15 can be more firm fix MWD instrument fishing head 13.
In order to make the clamping effect better, the clamping device further comprises a supporting cavity 18 and a clamp head 17, wherein the clamp head 17 is arranged inside the supporting cavity 18 and is limited to move by a limit baffle, and the card ejecting mechanism 15 is arranged at the bottom of the clamp head 17.
In addition, the end of the clamp head 17, which is far away from the snapping mechanism 15, is provided with the clamp 16, a plurality of protrusions are arranged inside the clamp 16, certain gaps are formed among the protrusions, and when the MWD instrument fishing head 13 enters the inside of the clamp head 17, the gaps can be shielded, so that the clamp 16 has certain adsorption force.
The fishing head 13 of the MWD instrument is locked by a plurality of steel bars, the plurality of steel bars are continuously reduced in diameter and firmly lock the MWD instrument body under the gravity action of the MWD instrument, and whether the fishing instrument enters the clamp 16 or not can be accurately judged by changing the area of a flow passage of the connecting body.
The embodiment is a further preferred embodiment, and the fishing tool has the advantages of reasonable overall structure design, simple structure and convenience in fishing.
Example 4
Referring to fig. 1-12, on the basis of embodiments 1, 2 or 3, a method for using the MWD bare-hole fishing tool is also provided, which comprises the MWD bare-hole fishing tool;
s01, a MWD (measurement while drilling) bare hole fishing tool is drilled down to a position 7-13m before the position where the MWD instrument of the fallen object exists;
s02, starting a slurry pump to circularly discharge oil gas, and simultaneously recording drilling parameters related to suspended weight, lifting friction resistance, lowering friction resistance, rotation resistance, pump stroke and pump pressure;
s03, starting to rotate the drilling tool and lowering the MWD open hole fishing tool;
s04, when the pump pressure rises, continuously rotating and lowering the MWD open hole fishing tool by 10-15cm and observing the change of the pump pressure;
s05, if the pump pressure is continuously increased, pulling out the MWD open hole fishing tool;
and S06, if the pump pressure is not changed or reduced, sequentially repeating the steps S03, S04 and S05.
Specifically, the joint barrel 9 is connected with a drilling tool, the drilling tool is lowered to the position 10m before the position where the falling object MWD instrument possibly exists, a slurry pump is started to circularly discharge oil gas, and meanwhile, related drilling parameters such as the hanging weight, the lifting friction resistance, the lowering friction resistance, the rotation resistance, the pump stroke and the pump pressure are recorded; then, starting to rotate the drilling tool at a low speed, and lowering the fishing tool; when an MWD instrument enters the lengthening cylinder 3 through the guide cylinder, the pressure of the circulating pump obviously rises, which indicates that a falling object enters the fishing tool, the drilling tool is continuously rotated and lowered at the moment, if the resistance does not exist, the lowering depth of the fishing tool is calculated according to the fishing size of the falling object, when the calculated lowering depth meets the requirement, the drilling tool is continuously lowered by 10-15cm, the change of the pump pressure is observed, and if the pump pressure is continuously increased, the fishing head 13 of the instrument completely enters the fishing tool and is locked; slowly lifting the drilling tool, observing the change of the pump pressure, if the pump pressure does not drop, indicating that the fishing head 13 of the MWD instrument is firmly grabbed, and continuously lifting the drilling tool; if the pump pressure is reduced, repeating the above actions to salvage the MWD instrument again; and after the MWD instrument is gripped, continuously lifting the drilling tool to the wellhead, detaching the drilling tool from the joint of the upper connector of the fishing tool and the drill rod connector, taking the MWD instrument out of the upper connector by using a lifting ring and a pneumatic winch, and completing fishing work of the MWD instrument.
The embodiment is the best implementation mode, the whole fishing process is simple to operate, simple and easy to implement, and the fishing efficiency is greatly improved.
Claims (10)
1. The utility model provides a MWD bore hole fishing tool which characterized in that: the MWD (measurement while drilling) instrument connector comprises a guide barrel (1), a lengthened barrel (3) and a connector barrel (9), wherein one end of the guide barrel (1) is connected with one end of the lengthened barrel (3), the other end of the lengthened barrel (3) is connected with the connector barrel (9), and a connector device used for being connected with a fishing head (13) of an MWD instrument is arranged in the connector barrel (9).
2. The MWD open hole fishing tool of claim 1, wherein: the connector device comprises a main body (4) and a clamping device, wherein the clamping device is connected to one end of the main body (4) and is used for being connected with a fishing head (13) of the MWD instrument.
3. The MWD open hole fishing tool of claim 2, wherein: the clamping device comprises two symmetrically-arranged slips (10), a through groove (8) matched with the slips (10) is symmetrically formed in two sides of the main body (4), the slips (10) are located in the through groove (8) to slide, and the main body (4) is further provided with a limiting device used for limiting the slips (10) to move.
4. The MWD open hole fishing tool of claim 3, wherein: stop device is first spring (11), the top of slips (10) with the top that leads to groove (8) all is the inclined plane setting, and the middle part of main part (4) winds first recess (7) have been seted up to main part (4) round, and second recess (12) have been seted up at slips (10) middle part, sets up first spring (11) in first recess (7) and second recess (12) simultaneously.
5. The MWD open hole fishing tool of claim 2, wherein: still include buffer gear, buffer gear includes guide bar (5) and second spring (6), guide bar (5) through connect the base set up in connect a section of thick bamboo (9) in, the sliding tray has been seted up at the top of guide bar (5), main part (4) are in through the sliding tray slide on guide bar (5), set up second spring (6) between the bottom of guide bar (5) and main part (4).
6. The MWD open hole fishing tool of claim 1, wherein: the piecing devices still include bullet card mechanism (15), and bullet card mechanism (15) include go-between (14) and set up a plurality of billet on go-between (14), and the billet encircles go-between (14) round setting, the billet is all inwards crooked formation and is used for locking the chamber of snatching of fishing head (13) of MWD instrument.
7. The MWD open hole fishing tool of claim 6, wherein: the clamp is characterized by further comprising a supporting cavity (18) and a clamp head (17), wherein the clamp head (17) is arranged inside the supporting cavity (18), and the card ejecting mechanism (15) is arranged at the bottom of the clamp head (17).
8. The MWD open hole fishing tool of claim 7, wherein: one end, far away from the card ejecting mechanism (15), of the clamp head (17) is provided with a clamp (16), and a plurality of protrusions are arranged on the inner surface of the clamp (16).
9. The MWD open hole fishing tool of claim 1, wherein: the tail parts of the guide cylinder (1) and the lengthening cylinder (3) are provided with righting seats (2).
10. A use method of an MWD open hole fishing tool is characterized by comprising the following steps:
s01, a MWD (measurement while drilling) bare hole fishing tool is drilled down to a position 7-13m before the position where the MWD instrument of the fallen object exists;
s02, starting a slurry pump to circularly discharge oil gas, and simultaneously recording drilling parameters related to suspended weight, lifting friction resistance, lowering friction resistance, rotation resistance, pump stroke and pump pressure;
s03, starting to rotate the drilling tool and lowering the MWD open hole fishing tool;
s04, when the pump pressure rises, continuously rotating and lowering the MWD open hole fishing tool by 10-15cm and observing the change of the pump pressure;
s05, if the pump pressure is continuously increased, pulling out the MWD open hole fishing tool;
and S06, if the pump pressure is not changed or reduced, sequentially repeating the steps S03, S04 and S05.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211497969.5A CN115898311A (en) | 2022-11-28 | 2022-11-28 | MWD (measurement while drilling) open hole fishing tool and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211497969.5A CN115898311A (en) | 2022-11-28 | 2022-11-28 | MWD (measurement while drilling) open hole fishing tool and using method |
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| Publication Number | Publication Date |
|---|---|
| CN115898311A true CN115898311A (en) | 2023-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211497969.5A Pending CN115898311A (en) | 2022-11-28 | 2022-11-28 | MWD (measurement while drilling) open hole fishing tool and using method |
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| CN (1) | CN115898311A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116950644A (en) * | 2023-09-20 | 2023-10-27 | 上海达坦能源科技股份有限公司 | Integrated directional and azimuth gamma measurement while drilling instrument |
-
2022
- 2022-11-28 CN CN202211497969.5A patent/CN115898311A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116950644A (en) * | 2023-09-20 | 2023-10-27 | 上海达坦能源科技股份有限公司 | Integrated directional and azimuth gamma measurement while drilling instrument |
| CN116950644B (en) * | 2023-09-20 | 2023-12-05 | 上海达坦能源科技股份有限公司 | Integrated directional and azimuth gamma measurement while drilling instrument |
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