CN111878001A - Integrated short connector of while-drilling instrument - Google Patents
Integrated short connector of while-drilling instrument Download PDFInfo
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- CN111878001A CN111878001A CN202010604866.9A CN202010604866A CN111878001A CN 111878001 A CN111878001 A CN 111878001A CN 202010604866 A CN202010604866 A CN 202010604866A CN 111878001 A CN111878001 A CN 111878001A
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- drill collar
- ring
- fixed
- instrument
- joint
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Abstract
An integrated short connector of a drilling instrument comprises a telescopic connector assembly, a fixed connector assembly and a drill collar adapter; the drill collar adapter comprises an upper drill collar adapter and a lower drill collar adapter, the telescopic connector assembly is arranged in the upper drill collar adapter, and the fixed connector assembly is arranged in the lower drill collar adapter; the telescopic connector assembly is in butt joint with the fixed connector assembly; the invention is integrated with each instrument drill collar pup joint of the rotary geological steering system, realizes power supply communication inside the instrument while being connected by the drill collar threads, and realizes the communication inside the instrument by the direct connection of the drill collars, thereby saving the manual connection link in field operation, reducing the construction safety risk, improving the operation efficiency, ensuring the reliability of power supply communication inside the instrument by using the drill collar threaded connection torque, reducing the use and assembly difficulty of the connector, simplifying the overall structure of the connector and shortening the length.
Description
Technical Field
The invention belongs to the field of geological drilling, and particularly relates to an integrated short connector of a drilling instrument.
Background
The connector of the logging-while-drilling instrument is a key component for connecting the short sections of each logging-while-drilling instrument, solves the problem of electromechanical connection between the short sections of the downhole logging-while-drilling instrument, ensures stable bridging of underground communication and power supply among the short sections of the whole logging-while-drilling system, and plays a role in starting and stopping connection. The conventional connector while drilling is connected to the lower end of an MWD instrument, is arranged in a water hole of a drill collar along with the MWD, and is connected with an LWD instrument interface at the lower part through the connector to realize power supply and communication. Because the logging-while-drilling instrument string has a longer size (generally larger than 10 meters) after being connected, in order to meet the requirement of wellhead connection and compensate the size error between the MWD instrument in the water hole and an external drill collar after being connected, the conventional connector has a certain expansion amount when being designed, the purpose is to disconnect the external drill collar for a certain distance when the wellhead is connected, connect the connector extending out of the end face of the male thread of the drill collar with the LWD end, then connect the external drill collar, and compensate the compression amount generated in the process by the connector. Like early flexible connector, through designing telescopic armoured cable joint, realize flexible telescopic connection, but in the operation along with boring, because of the armoured cable is barely leaked in the water hole, receive mud to erode and lead to insulating poor, the cable easily to break scheduling problem, tend to eliminate gradually. In recent years, in order to achieve stable extension and retraction and downhole pressure balance, a rigid extension and retraction connector commonly used in the market is designed with an overlong extension structure and an oil pressure balance or air pressure balance structure, so that the total length of the rigid extension and retraction connector is longer (generally more than 2 meters). With the development of a rotating while-drilling geosteering system in recent years, after being matched with LWD instruments with various parameters, the whole logging while-drilling instrument string is too long in size, so that logging parameters are lagged relative to a borehole, the guided drilling construction is inconvenient, and the problems of large safety risk of field matching, inconvenience in transportation, waste of drilling tool materials and the like exist.
Disclosure of Invention
The invention aims to provide an integrated while-drilling instrument short connector to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated short connector of a drilling instrument comprises a telescopic connector assembly, a fixed connector assembly and a drill collar adapter; the drill collar adapter comprises an upper drill collar adapter and a lower drill collar adapter, the telescopic connector assembly is arranged in the upper drill collar adapter, and the fixed connector assembly is arranged in the lower drill collar adapter; the telescopic connector assembly is in butt joint with the fixed connector assembly;
the telescopic connector assembly comprises an adjusting shell, a sliding rod, a protection cylinder, a fixed joint, a stop ring, a sealing head, a sliding ring adjusting and connecting assembly, an aviation socket and an upper connecting wire; the adjusting shell is in threaded connection with one end of the sliding rod, a sealing head is sleeved on the outer side of the other end of the sliding rod, and the outer side of the sealing head is in threaded connection with the inner side of one end of the protection cylinder; the inner side of the other end of the protection cylinder is in threaded connection with the outer side of the fixed joint, a sliding ring adjusting and connecting assembly is mounted inside the fixed joint and connected with one end of an upper connecting wire, the other end of the upper connecting wire is connected with an aviation socket, and the aviation socket is arranged at one end, close to the adjusting shell, of the sliding rod; the stop ring is sleeved outside the fixed joint;
the fixed connector assembly comprises an outer cylinder, a righting ring, a fixed base, a slip ring plug, a supporting seat, an aviation socket and a lower connecting wire; the outer barrel is in threaded connection with one end of the fixed base, the other end of the fixed base is provided with an aviation socket, the supporting seat is arranged at one end, close to the outer barrel, of the fixed base, and the supporting seat is in threaded connection with the fixed base; the slip ring plug is arranged in the supporting seat, and a lower connecting wire is arranged between the slip ring plug and the aviation socket; the outer sides of the outer cylinder and the fixed base are sleeved with centering rings;
the upper drill collar adapter is in threaded connection with the lower drill collar adapter, and when the upper drill collar adapter is connected with the lower drill collar adapter, the slip ring adjusts the butt joint of the connecting component and the slip ring plug.
Furthermore, a sealing element is arranged at the threaded connection part of the adjusting shell and the sliding rod, two keys are symmetrically arranged at one end of the sliding rod close to the sealing head, and a key groove slide way matched with the keys is arranged in the sealing head; the sealing head is provided with a mud guard ring at the inner side close to one end of the sliding rod.
Furthermore, a wear-resisting ring and a positioning pin are installed on the stop ring, the positioning pin is matched with a positioning hole in the end face of the upper drill collar conversion joint, and the stop ring is connected with the flange of the upper drill collar conversion joint through a plurality of locking screws.
Furthermore, the bottom of the fixed joint is in threaded connection with a locking sleeve, and the locking sleeve is connected with the compression joint; the inside coaxial conduit that is provided with of a protection section of thick bamboo, the solid line seat of conduit upper end installation, the solid line seat is fixed through the upper portion connecting wire that line ball board and screw were adjusted coupling assembling and are drawn forth, and the butt joint of upper portion connecting wire and the terminal of aviation socket afterbody is through aviation socket and upper portion instrument electrical connection.
Further, a fixed seat is arranged at the lower part of the supporting seat, a mounting hole between the supporting seat and the slip ring plug is used for limiting the slip ring plug through a clamp spring B, and a hole between the supporting seat and the fixed base is used for limiting the supporting seat through a clamp spring A; the lower part of the centralizing ring is provided with a positioning pin, and a slurry flow channel is arranged in the centralizing ring.
Furthermore, the locking sleeve is connected with the compression joint through a group of symmetrical corrugated springs B; the elastic retainer ring A is arranged in the inner side clamping groove of the compression joint; a fixed cylinder with an inner hexagonal groove and an anti-rotation supporting seat are arranged in the fixed joint, and the fixed cylinder is in threaded connection with the fixed joint; an elastic retainer ring B is arranged in the fixed cylinder, and a corrugated spring assembly A is arranged on an anti-rotation supporting seat; a slip ring socket is arranged below the anti-rotation supporting seat, an anti-rotation pin is arranged on the slip ring socket, and the anti-rotation pin is aligned with a positioning hole in the anti-rotation supporting seat; a wedge-shaped groove is formed in the anti-rotation supporting seat, and the elastic clamping ring B is clamped in the wedge-shaped groove; a metal connecting sheet is arranged inside the slip ring socket; when the upper drill collar adapter and the lower drill collar adapter are connected, the slip ring plugs correspond to the metal connecting sheets in the slip ring socket one by one.
Furthermore, the upper end of the adjusting shell is connected with an upper instrument connector of an MWD instrument or an LWD instrument, and the adjusting shell with different lengths is replaced according to the size of an upper drilling tool to complete the matching connection with the upper instrument.
Compared with the prior art, the invention has the following technical effects:
the invention relates to an integrated short connector of a drilling instrument, which mainly comprises a telescopic connector assembly, a fixed connector assembly and a drill collar adapter. The flexible connector assembly is installed in the upper drill collar adapter, the fixed connector assembly is installed in the lower drill collar adapter, the upper drill collar adapter and the lower drill collar adapter directly drive the butt joint of the internal connector, the special slip ring adjusting and connecting assembly ensures that the communication and power supply bridging between the short sections of the logging-while-drilling system is more stable in the underground, the matching and connecting requirements between an LWD instrument and between the LWD instrument and an MWD instrument can be met, the connecting distance between the logging-while-drilling instruments is effectively shortened to be within one meter, the matching and connecting operation of the instruments is simpler, the measuring point of the instruments is closer to the drill collar, and the convenience in assembling and transporting is greatly improved.
The telescopic connector assembly is arranged in the upper drill collar adapter connector in the middle through the stop ring and is connected with the upper instrument connector through the adjusting shell, so that power supply and communication with an upper instrument are realized. An anti-rotation structure and a mud-blocking ring structure are designed between an adjusting shell and a sealing head of the telescopic connector assembly, so that the adjusting shell can smoothly slide between the sealing head and a protection barrel, the sliding distance is 50mm, and the adjusting shell is used for compensating the calculation error of the size between an upper MWD instrument or an LWD instrument and a drill collar. Furthermore, a sliding ring adjusting and connecting assembly is designed in the fixed joint, and a special rotating and connecting assembly adjusts and compensates the structure, so that the sliding ring plug and the socket are ensured to be connected perfectly. Furthermore, the stop ring is connected with the upper instrument connector in a flange mode, so that the fixed connector and the internal structure of the fixed connector are arranged inside the upper instrument connector in the middle, and the telescopic connector is positioned in the middle through the locking sleeve.
Fixed connector assembly installs in the middle of the body in lower part drill collar crossover sub through righting the ring, and fixed baseplate and LWD instrument articulate, through inside aviation plug and lower part instrument intercommunication, and is further, fixed baseplate internally designed the supporting seat of fixed sliding ring plug, realize the location of supporting seat and fixed baseplate and the location between sliding ring plug and the supporting seat respectively through the jump ring structure for the hole of two layers, the mounting means is simpler. Furthermore, the fixed base penetrates through the centering ring and then is in threaded connection with the outer cylinder, the centering ring is provided with 2 positioning pins which are matched with the positioning holes of the lower drill collar adapter, and after the centering ring is in threaded connection with the lower drill collar adapter, centering fixation of the whole fixed connector is achieved.
Sliding ring adjusting and connecting assembly is connection structure in the special of fixed joint internal design, has double-deck ripple spring structure, and inside ripple spring assembly provides the axial butt joint pretightning force for the sliding ring socket, and its purpose is after guaranteeing the sliding ring butt joint, and sliding ring plug and sliding ring socket metal connection piece correspond the contact, can not misplace because of vibration in the pit, and this subassembly can be different according to sliding ring lectotype and butt joint performance, provides the pretightning force of equidimension not, and the guarantee is connected the reliability. When the external corrugated spring assembly is used for positioning the female slip ring, the dimensional tolerance generated by the axial distance during butt joint can be adjusted according to design requirements, elastic contact between the slip ring adjusting and connecting assembly and a fixed base of the fixed connector is guaranteed, and damage to a mechanical structure is prevented.
When the integrated short connector of the drilling instrument is connected, the upper drill collar adapter and the lower drill collar adapter are directly butted, the internal connection of the connector can be realized, a wear-resistant ring structure is designed outside the stop ring, the wear-resistant ring is made of PEEK non-metal materials, when the instrument is butted, firstly, the wear-resistant ring is contacted with the lower drill collar adapter, the wear-resistant ring has certain elastic deformation amount, the stop ring can stably and smoothly slide into the lower drill collar adapter, after the stop ring completely enters the lower drill collar adapter, the thread buckles of the upper drill collar adapter and the lower drill collar adapter are contacted, at the moment, the stop ring already centralizes the slip ring adjusting and connecting assembly, and the problems that the slip ring is damaged due to the fact that the instrument is not centered in butt joint are solved.
The integrated short connector of the drilling-while-drilling instrument has stronger universality, can be directly connected with a pup joint of an LWD (logging while drilling) or MWD (measuring while drilling) drill collar to form an integrated functional module, so that the matching length of the drilling-while-drilling rotating geological steering system is shorter, the field operation requirement is further simplified, and the construction difficulty is reduced.
Drawings
FIG. 1 shows a schematic view of a "telescopic connector assembly";
FIG. 2 shows a cross-sectional view of a "telescopic connector assembly A-A";
FIG. 3 shows a schematic view of a "fixed connector assembly";
fig. 4 shows a schematic view of a slip ring adjustment connection assembly.
FIG. 5 shows an "integrated short connector mating" schematic;
FIG. 6 shows a schematic view of the "adjustment compensation principle of the rotating link assembly";
in fig. 1 to 6, 1 is an adjustment housing; 2 is a sealing element; 3 is a sliding rod; 4 is a sealing head; 5 is a protective cylinder; 6 is a bond; 7 is a fixed joint; 8 is a positioning pin; 9 is a stop ring; 10 is a wear-resistant ring; 11 is a locking sleeve; 12, a slip ring adjusting and connecting assembly; 13 is a compression joint; 14 is an upper connecting line; 15 is a conduit; 16 is a wire fixing seat; 17 is a wire pressing plate; 18 is screw A; 19 a mud guard ring; 20 is a binding post; 21 is a screw B; 22 is an aviation socket; 23 is a locking screw; 24 is an outer cylinder; 25 is a slip ring plug; 26, supporting a seat; 27 is a righting ring; 28 is a fixed base; 29 is a lower connecting line; 30 is a slurry flow passage B; 31 is a positioning seat; 32 is a snap spring A for holes; 33 is a clamp spring B for holes; 34 is a fixed cylinder; 35 is a corrugated spring assembly A; 36 is an anti-rotation support seat; 37 is a slip ring socket; 38 is a bellows spring assembly B; 39 is an elastic collar A; 40 is a metal connecting sheet; 41 is an elastic collar B; 42 is an inner hexagonal groove; 43 is the upper instrument connector; 44 is an upper drill collar adapter; 45 lower drill collar adapter; 46 is a steel wire retainer ring; 47 is a lower LWD drill collar; 48 is a wire through hole; 49 is LWD instrument joint; 50 is a drill collar thread; 51 a lower aircraft joint; and 52 is an anti-rotation pin.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
referring to fig. 1 to 6, an integrated while drilling instrument short connector includes a telescopic connector assembly, a fixed connector assembly, and a drill collar adapter; the drill collar adapter comprises an upper drill collar adapter 44 and a lower drill collar adapter 45, the telescopic connector assembly is arranged in the upper drill collar adapter, and the fixed connector assembly is arranged in the lower drill collar adapter; the telescopic connector assembly is in butt joint with the fixed connector assembly; the flexible connector assembly is installed in the upper drill collar adapter, the fixed connector assembly is installed in the lower drill collar adapter, the upper drill collar adapter and the lower drill collar adapter directly drive the butt joint of the internal connector, the special slip ring adjusting and connecting assembly ensures that the communication and power supply bridging between the short sections of the logging-while-drilling system is more stable in the underground, the matching and connecting requirements between an LWD instrument and between the LWD instrument and an MWD instrument can be met, the connecting distance between the logging-while-drilling instruments is effectively shortened to be within one meter, the matching and connecting operation of the instruments is simpler, the measuring point of the instruments is closer to the drill collar, and the convenience in assembling and transporting is greatly improved.
The telescopic connector assembly comprises an adjusting shell 1, a sliding rod 3, a protective cylinder 5, a fixed joint 7, a stop ring 9, a sealing head 4, a sliding ring adjusting and connecting assembly 12, an aviation socket 22 and an upper connecting wire 14; the adjusting shell 1 is in threaded connection with one end of a sliding rod 3, a sealing head 4 is sleeved on the outer side of the other end of the sliding rod 3, and the outer side of the sealing head 4 is in threaded connection with the inner side of one end of a protection cylinder 5; the inner side of the other end of the protection cylinder 5 is in threaded connection with the outer side of the fixed joint 7, a sliding ring adjusting and connecting assembly 12 is installed inside the fixed joint 7, the sliding ring adjusting and connecting assembly 12 is connected with one end of an upper connecting wire 14, the other end of the upper connecting wire 14 is connected with an aviation socket 22, and the aviation socket 22 is arranged at one end, close to the adjusting shell 1, of the sliding rod 3; the stop ring 9 is sleeved outside the fixed joint 7; the power supply and communication with the upper instrument are realized by connecting the adjusting shell with the upper instrument connector. An anti-rotation structure and a mud-blocking ring structure are designed between an adjusting shell and a sealing head of the telescopic connector assembly, so that the adjusting shell can smoothly slide between the sealing head and a protection barrel, the sliding distance is 50mm, and the adjusting shell is used for compensating the calculation error of the size between an upper MWD instrument or an LWD instrument and a drill collar. Furthermore, a sliding ring adjusting and connecting assembly is designed in the fixed joint, and a special rotating and connecting assembly adjusts and compensates the structure, so that the sliding ring plug and the socket are ensured to be connected perfectly. Furthermore, the stop ring is connected with the upper instrument connector in a flange mode, so that the fixed connector and the internal structure of the fixed connector are arranged inside the upper instrument connector in the middle, and the telescopic connector is positioned in the middle through the locking sleeve.
The fixed connector assembly comprises an outer cylinder 24, a righting ring 27, a fixed base 28, a slip ring plug 25, a supporting seat 26, an aviation socket 22 and a lower connecting wire 29; the outer cylinder 24 is in threaded connection with one end of the fixed base 28, the other end of the fixed base 28 is provided with the aviation socket 22, the supporting seat 26 is arranged at one end of the fixed base close to the outer cylinder 24, and the supporting seat 26 is in threaded connection with the fixed base 28; the slip ring plug 25 is arranged in the supporting seat 26, and a lower connecting wire 29 is arranged between the slip ring plug 25 and the aviation socket 22; the outer sides of the outer cylinder 24 and the fixed base 28 are sleeved with righting rings 27;
the upper drill collar adapter is in threaded connection with the lower drill collar adapter, and when the upper drill collar adapter is connected with the lower drill collar adapter, the slip ring adjusts the butt joint of the connecting component 12 and the slip ring plug 25. Install in lower part drill collar crossover sub between two parties through righting the ring, fixed baseplate and LWD instrument articulate, through inside aviation plug and lower part instrument intercommunication, further, fixed baseplate internally designed the supporting seat of fixed sliding ring plug, realize the location of supporting seat and fixed baseplate and the location between sliding ring plug and the supporting seat respectively through two layers for the hole jump ring structure, the mounting means is simpler. Furthermore, the fixed base penetrates through the centering ring and then is in threaded connection with the outer cylinder, the centering ring is provided with 2 positioning pins which are matched with the positioning holes of the lower drill collar adapter, and after the centering ring is in threaded connection with the lower drill collar adapter, centering fixation of the whole fixed connector is achieved.
A sealing element 2 is arranged at the threaded connection part of the adjusting shell 1 and the sliding rod 3, two keys 6 are symmetrically arranged at one end of the sliding rod 3 close to the sealing head, and a key groove slideway matched with the keys 6 is arranged in the sealing head 4; the sealing head 4 is provided with a mud guard ring 19 at the inner side close to one end of the sliding rod 3.
The stop ring 9 is provided with a wear- resistant ring 10 and 2 positioning pins 8, the positioning pins 8 are matched with positioning holes on the end surface of the upper drill collar adapter 44, and the stop ring 9 is in flange connection with the upper drill collar adapter 44 through a plurality of locking screws 23.
The bottom of the fixed joint 7 is in threaded connection with a locking sleeve 11, and the locking sleeve 11 is connected with a compression joint 13; the inside coaxial conduit 15 that is provided with of protection section of thick bamboo 5, the solid line seat 16 of conduit 15 upper end installation, the solid line seat 16 is fixed with the upper portion connecting wire 14 that the sliding ring adjusting connection subassembly 12 was drawn forth through line ball board 17 and screw, and upper portion connecting wire 14 docks with the terminal 20 of aviation socket 22 afterbody, through aviation socket 22 and upper portion instrument electrical connection.
A fixed seat 31 is arranged at the lower part of the supporting seat 26, the sliding ring plug 25 is limited by a clamp spring B33 for an installation hole between the supporting seat 26 and the sliding ring plug 25, and the supporting seat 26 is limited by a clamp spring A32 for a hole between the supporting seat 26 and the fixed base 28; the lower part of the righting ring 27 is provided with a positioning pin 8, and the inside of the righting ring 27 is provided with a slurry flow channel 30.
The locking sleeve 11 and the compression joint 13 are connected through a group of symmetrical corrugated springs B; the elastic collar A39 is arranged in an inner clamping groove of the compression joint 13; a fixed cylinder 34 with an inner hexagonal groove 42 and an anti-rotation supporting seat 36 are arranged inside the fixed joint 7, and the fixed cylinder 34 is in threaded connection with the fixed joint 7; an elastic collar B41 is arranged in the fixed cylinder 34, and a corrugated spring assembly A35 is arranged on the anti-rotation supporting seat 36; a slip ring socket 37 is arranged below the anti-rotation support seat 36, an anti-rotation pin 52 is arranged on the slip ring socket 37, and the anti-rotation pin 52 is aligned with a positioning hole on the anti-rotation support seat 36; a wedge-shaped groove is formed in the anti-rotation support seat 36, and the elastic retainer ring B41 is clamped in the wedge-shaped groove; a metal connecting sheet 40 is arranged in the slip ring socket 37; when the upper drill collar adapter is connected with the lower drill collar adapter, the metal connecting sheets 40 inside the slip ring plug 25 and the slip ring socket 37 are in one-to-one correspondence. Sliding ring adjusting and connecting assembly has double-deck ripple spring structure, and inside ripple spring assembly provides the axial butt joint pretightning force for the sliding ring socket, and its purpose guarantees the sliding ring butt joint back, and sliding ring plug and sliding ring socket metal connection piece correspond the contact, can not misplace because of vibration in the pit, and this subassembly can be different according to sliding ring type selection and butt joint performance, provides the pretightning force of equidimension not, and the reliability is connected in the guarantee. When the external corrugated spring assembly is used for positioning the female slip ring, the dimensional tolerance generated by the axial distance during butt joint can be adjusted according to design requirements, elastic contact between the slip ring adjusting and connecting assembly and a fixed base of the fixed connector is guaranteed, and damage to a mechanical structure is prevented.
The upper end of the adjusting shell 1 is connected with an upper instrument connector 43 of an MWD instrument or an LWD instrument, and the adjusting shell 1 with different lengths is replaced to complete the matching connection with the upper instrument according to the size of an upper drilling tool.
Referring to fig. 1, the telescopic connector assembly of the present invention comprises a main carrier of the connector, which is composed of an adjusting housing 1, a sliding rod 3, a protective cylinder 5, a fixed joint 7 and a stop ring 9. The adjusting shell 1 is in threaded connection with a sliding rod 3, a sealing element 2 is mounted on the sliding rod 3, the sealing element has 140MPa pressure-bearing capacity, and the sealing element is not explained below. 2 keys 6 of lower extreme symmetry installation of slide bar 3, after aligning with the keyway slide of sealed first 4 interior designs, through sealed first 4 and 5 threaded connection of protective barrel, guarantee slide bar 3 and stretch out and draw back smoothly and do not produce the rotation in protective barrel 5 is inside, and the flexible volume of sliding is 50mm, and sufficient compensation upper portion instrument dimensional error installs fender mud ring 19 on the sealed first upper end, can clear up surperficial mud when slide bar 3 moves, keeps the motion smooth and easy. An aviation socket 22 is arranged on the upper end face of the sliding rod 3 and is fixed through four screws B.
Referring to fig. 1, a fixed joint 7 is used as a key component of a connector, a slip ring adjusting and connecting assembly 12 is mounted inside, the position is limited by a compression joint 13, the upper part of the slip ring adjusting and connecting assembly is in threaded connection with a protective cylinder 5, a conduit 15 is mounted inside, a wire fixing seat 16 is mounted at the upper end of the conduit 15, an upper connecting wire 14 led out from the slip ring adjusting and connecting assembly 12 is fixed through a wire pressing plate 17 and 2 screws A18, the upper connecting wire 14 caused by movement of a sliding rod 3 is prevented from being broken, the upper connecting wire 14 is butted with a binding post 20 at the tail part of an aviation plug 22, and the aviation plug 22.
Referring to fig. 1, 2 and 5, the upper end of the adjustment housing 1 can be connected to the upper tool joint 43 of the MWD tool or LWD tool, and the adjustment housing 1 can be replaced with a different length to complete the coupling with the upper tool according to the size of the upper drill. The lower end of the fixed joint 7 penetrates through the stop ring 9, in the process, the fixed joint 7 drives the sealing head 4 to slide downwards along the sliding rod 3 for a distance through the protection barrel 5, the distance has 50mm adjustment amount at most, the calculation error of the dimension between the MWD instrument and the drill collar is sufficiently compensated, after the locking sleeve 11 is connected with the thread on the fixed joint 7, the sliding rod 3 and the sealing head 4 do not move relatively any more, the stop ring 9 is provided with the wear-resisting ring 10 and the 2 positioning pins 8, the positioning pins 8 are matched with the positioning holes in the end face of the upper drill collar conversion joint 44 to prevent the stop ring 9 from rotating, and the stop ring 9 is connected with the upper drill collar conversion joint 44 in a flange mode through the 4 locking screws 23.
Referring to fig. 3 and 5, the fixed connector assembly of the present invention comprises an outer cylinder 24, a centering ring 27 and a fixed base 28, which constitute a carrier of the fixed connector, wherein a slip ring plug 25 is installed in a supporting seat 26, and is positioned by a fixed seat 31 designed at the lower part of the supporting seat 26, and then the mounting hole is used for limiting the slip ring plug 25 by a snap spring B33, the supporting seat 26 is in threaded connection with the fixed base 28, and the supporting seat 26 is limited by a snap spring a32 through the hole. The fixed base 28 passes through the central through hole of the centralizing ring 27 and is fixed with the fixed base 28 through the outer cylinder 24 in a threaded connection. The lower connecting wire 29 led out from the slip ring plug 25 is connected with the aviation plug 22, and the aviation plug 22 is installed at the lower end of the fixed base 28 through 4 screws B. The centralizing ring 27 is arranged in a water hole of the lower drill collar adapter 45, and the centralizing ring 27 is provided with a conical drilling fluid overflowing channel 30 to reduce the erosion of the drilling fluid to a lower structure of the centralizing ring 27.
Referring to fig. 4 and 6, a double compensation slip ring adjustment structure is designed for implementation details of the slip ring adjustment connection assembly 12. Fixed joint 7 internal design has first layer compensation structure, the design has a solid fixed cylinder 34 of hexagon socket head socket 42, be connected with fixed joint 7 through the screw thread, gu fixed cylinder 34 internally mounted elasticity rand B41, ripple spring assembly A35 is installed on preventing changeing supporting seat 36, prevent changeing 52 of sliding ring socket 37 and prevent changeing the locating hole on the supporting seat 36 and align, then insert from the lower extreme of fixed joint 7, it is spacing to prevent changeing after the wedge groove of design passes through elasticity rand B41 on the supporting seat 36, it can not drive sliding ring socket 37 and pop out to guarantee to prevent changeing supporting seat 36 under ripple spring assembly A35's elastic force, but inwards compress. A corrugated spring assembly B38 is arranged at the lower end of the fixed joint 7, an elastic clamping ring A39 is arranged in a clamping groove of the compression joint 13, and after the corrugated spring assembly B38 is extruded by the compression joint 13, the elastic clamping ring A39 and the step surface of the fixed joint 7 ensure that the compression joint 13 limits the position of the slip ring socket 37.
Referring to fig. 1, 3 and 5, the working principle of an integrated while drilling short connector is as follows: the telescopic connector assembly is connected with the upper drill collar adapter 44 through the stop ring 9, has the telescopic amount of 50mm, and can adjust the errors of the length of the internal structure of the MWD or LWD water hole and the length of the drilling tool. The lower drill collar adapter 45 is connected with a lower LWD drill collar 47, the fixed base 28 is connected with an LWD instrument connector 49, the aviation socket 22 is connected with a lower aviation connector 51, a lead of the lower aviation connector 51 is communicated with an internal circuit of the lower LWD instrument through a wire passing hole 48, and power supply and signal transmission between the upper instrument and the lower instrument can be realized after the connectors are butted. The centering ring 27 is installed on the fixed base 28, rotation prevention is achieved through the 2 positioning pins 8 and the lower drill collar adapter 45, and then the steel wire retainer ring 46 is installed to position the centering ring 27. When the instruments are in butt joint, the instruments can be in vertical butt joint at a wellhead or in horizontal butt joint at the ground, the centering of the instruments is ensured as much as possible, in the connection process, the stop ring 9 firstly enters the water hole of the lower drill collar adapter 45, and as the wear-resistant ring 10 is made of a non-metal material, the friction between the stop ring 9 and the water hole of the drill collar adapter 45 is reduced while the drill collar adapter 44 is centered, and the centering connection of the connectors is ensured. When the upper and lower drill collar threads 50 are screwed, the slip ring adjusting and connecting assembly 12 is driven to be stably butted with the slip ring plug 25, so that the upper part and the lower part of the instrument are connected.
Referring to fig. 5 and 6, the principle of the adjustment movement of the rotating connection assembly is that when the external drill collar drives the internal slip ring assembly to connect, the slip ring plug 25 is required to enter the slip ring socket 37 and then to be pressed inward for a certain distance against the slip ring socket 37, and the corrugated spring assembly a35 generates an axial elastic pre-tightening force on the slip ring socket 37, which may ensure that the metal connection pieces 40 inside the slip ring plug 25 and the slip ring socket 37 are in one-to-one correspondence, thereby preventing the connection from being loosened due to downhole vibration. The corrugated spring assembly B38 supports the compression joint 13, and when the compression distance of the slip ring is too large, the fixed base 28 is compressed against the elastic force of the corrugated spring assembly B38 for a second time after contacting the compression joint 13. The sliding ring adjusting structure with double compensation has the advantages that stable connection of the inner sliding ring is guaranteed, and the situation that the connector is damaged due to the fact that the mechanical structure is hard to touch when an external mechanical structure is in butt joint or underground vibration is too large is avoided.
The invention is integrated with each instrument drill collar pup joint of the rotary geological steering system, realizes power supply communication inside the instrument while being connected by the drill collar threads, and realizes the communication inside the instrument by the direct connection of the drill collars, thereby saving the manual connection link in field operation, reducing the construction safety risk, improving the operation efficiency, ensuring the reliability of power supply communication inside the instrument by using the drill collar threaded connection torque, reducing the use and assembly difficulty of the connector, simplifying the overall structure of the connector and shortening the length.
The above-mentioned contents are only for explaining the technical idea of the structural design of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.
Claims (7)
1. An integrated while-drilling instrument short connector is characterized by comprising a telescopic connector assembly, a fixed connector assembly and a drill collar adapter; the drill collar adapter comprises an upper drill collar adapter (44) and a lower drill collar adapter (45), the telescopic connector assembly is arranged in the upper drill collar adapter, and the fixed connector assembly is arranged in the lower drill collar adapter; the telescopic connector assembly is in butt joint with the fixed connector assembly;
the telescopic connector assembly comprises an adjusting shell (1), a sliding rod (3), a protective cylinder (5), a fixed joint (7), a stop ring (9), a sealing head (4), a sliding ring adjusting and connecting assembly (12), an aviation socket (22) and an upper connecting wire (14); the adjusting shell (1) is in threaded connection with one end of the sliding rod (3), a sealing head (4) is sleeved on the outer side of the other end of the sliding rod (3), and the outer side of the sealing head (4) is in threaded connection with the inner side of one end of the protection cylinder (5); the inner side of the other end of the protection cylinder (5) is in threaded connection with the outer side of the fixed joint (7), a sliding ring adjusting and connecting assembly (12) is installed inside the fixed joint (7), the sliding ring adjusting and connecting assembly (12) is connected with one end of an upper connecting wire (14), the other end of the upper connecting wire (14) is connected with an aviation socket (22), and the aviation socket (22) is arranged at one end, close to the adjusting shell (1), of the sliding rod (3); the stopping ring (9) is sleeved outside the fixed joint (7);
the fixed connector assembly comprises an outer cylinder (24), a righting ring (27), a fixed base (28), a slip ring plug (25), a supporting seat (26), an aviation socket (22) and a lower connecting wire (29); the outer cylinder (24) is in threaded connection with one end of the fixed base (28), the other end of the fixed base (28) is provided with the aviation socket (22), the supporting seat (26) is arranged at one end, close to the outer cylinder (24), of the fixed base, and the supporting seat (26) is in threaded connection with the fixed base (28); a slip ring plug (25) is arranged in the supporting seat (26), and a lower connecting wire (29) is arranged between the slip ring plug (25) and the aviation socket (22); a righting ring (27) is sleeved on the outer sides of the outer cylinder (24) and the fixed base (28);
the upper drill collar adapter is in threaded connection with the lower drill collar adapter, and when the upper drill collar adapter is connected with the lower drill collar adapter, the slip ring adjusts the butt joint of the connecting component (12) and the slip ring plug (25).
2. The integrated while drilling instrument short connector as recited in claim 1, characterized in that a sealing element (2) is arranged at the threaded connection part of the adjusting shell (1) and the sliding rod (3), two keys (6) are symmetrically arranged at one end of the sliding rod (3) close to the sealing head, and a keyway slideway matched with the keys (6) is arranged in the sealing head (4); a mud-blocking ring (19) is arranged on the inner side of one end of the sealing head (4) close to the sliding rod (3).
3. The integrated while drilling instrument short connector as recited in claim 1, characterized in that the stop ring (9) is provided with a wear-resistant ring (10) and (2) positioning pins (8), the positioning pins (8) are matched with positioning holes on the end face of the upper drill collar adapter (44), and the stop ring (9) is flanged with the upper drill collar adapter (44) through a plurality of locking screws (23).
4. The integrated while drilling instrument short connector as recited in claim 1, characterized in that a locking sleeve (11) is connected to the bottom of the fixed joint (7) in a threaded manner, and the locking sleeve (11) is connected with the compression joint (13); a wire conduit (15) is coaxially arranged in the protection cylinder (5), a wire fixing seat (16) is installed at the upper end of the wire conduit (15), the wire fixing seat (16) fixes an upper connecting wire (14) led out by the sliding ring adjusting and connecting assembly (12) through a wire pressing plate (17) and a screw, the upper connecting wire (14) is in butt joint with a wiring terminal (20) at the tail of an aviation socket (22), and the upper connecting wire is electrically connected with an upper instrument through the aviation socket (22).
5. The integrated while drilling instrument short connector as recited in claim 1, wherein a fixed seat (31) is arranged at the lower part of the supporting seat (26), a clamp spring B (33) for limiting a mounting hole between the supporting seat (26) and the slip ring plug (25) is used for limiting the slip ring plug (25), and a clamp spring A (32) for limiting the supporting seat (26) is arranged between the supporting seat (26) and the fixed base (28); the lower part of the righting ring (27) is provided with a positioning pin (8), and a slurry flow channel (30) is arranged in the righting ring (27).
6. The while-drilling instrument integrated short connector as recited in claim 4, characterized in that the locking sleeve (11) and the compression joint (13) are connected through a set of symmetrical corrugated springs B; the elastic retainer ring A (39) is arranged in the inner side clamping groove of the compression joint (13); a fixed cylinder (34) with an inner hexagonal groove (42) and an anti-rotation supporting seat (36) are arranged in the fixed joint (7), and the fixed cylinder (34) is in threaded connection with the fixed joint (7); an elastic collar B (41) is arranged in the fixed cylinder (34), and a corrugated spring assembly A (35) is arranged on an anti-rotation supporting seat (36); a slip ring socket (37) is arranged below the anti-rotation supporting seat (36), an anti-rotation pin (52) is arranged on the slip ring socket (37), and the anti-rotation pin (52) is aligned with a positioning hole in the anti-rotation supporting seat (36); a wedge-shaped groove is formed in the anti-rotation supporting seat (36), and the elastic clamping ring B (41) is clamped in the wedge-shaped groove; a metal connecting sheet (40) is arranged in the slip ring socket (37); when the upper drill collar conversion joint is connected with the lower drill collar conversion joint, the slip ring plugs (25) correspond to the metal connecting sheets (40) in the slip ring socket (37) one by one.
7. The integrated while drilling instrument short connector as recited in claim 1, wherein the upper end of the adjusting housing (1) is connected with an upper instrument connector (43) of an MWD instrument or an LWD instrument, and the adjusting housing (1) with different length is replaced to complete the matching with the upper instrument according to the size of the upper drilling tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010604866.9A CN111878001B (en) | 2020-06-29 | 2020-06-29 | Integrated short connector of while-drilling instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010604866.9A CN111878001B (en) | 2020-06-29 | 2020-06-29 | Integrated short connector of while-drilling instrument |
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| Publication Number | Publication Date |
|---|---|
| CN111878001A true CN111878001A (en) | 2020-11-03 |
| CN111878001B CN111878001B (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010604866.9A Active CN111878001B (en) | 2020-06-29 | 2020-06-29 | Integrated short connector of while-drilling instrument |
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| Country | Link |
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| CN (1) | CN111878001B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116950577A (en) * | 2023-09-19 | 2023-10-27 | 中海油田服务股份有限公司 | Conversion nipple of logging while drilling instrument |
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| CN105134095A (en) * | 2015-08-11 | 2015-12-09 | 中国石油天然气集团公司 | Telescopic connector for logging-while-drilling instrument |
| CN106887736A (en) * | 2017-01-19 | 2017-06-23 | 中国科学院地质与地球物理研究所 | It is a kind of with nose balance function with bore sound wave interior cabling structure and connection method |
| CN108119127A (en) * | 2017-12-07 | 2018-06-05 | 中国石油天然气集团公司 | A kind of logging while drilling apparatus connector |
| CN109882085A (en) * | 2019-02-19 | 2019-06-14 | 中国海洋石油集团有限公司 | A kind of connection structure and drill collar pipe nipple male and female head with brill instrument drill collar |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4483394A (en) * | 1982-11-01 | 1984-11-20 | Dresser Industries, Inc. | Hydraulic power unit for measurement while drilling apparatus |
| CN202333397U (en) * | 2011-11-25 | 2012-07-11 | 中国石油天然气集团公司 | Electrical communicating device for measuring while drilling |
| CN202441363U (en) * | 2012-02-22 | 2012-09-19 | 中国石油天然气集团公司 | Straight inserting structure for nipples of underground instrument while drilling |
| CN105134095A (en) * | 2015-08-11 | 2015-12-09 | 中国石油天然气集团公司 | Telescopic connector for logging-while-drilling instrument |
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| CN108119127A (en) * | 2017-12-07 | 2018-06-05 | 中国石油天然气集团公司 | A kind of logging while drilling apparatus connector |
| CN109882085A (en) * | 2019-02-19 | 2019-06-14 | 中国海洋石油集团有限公司 | A kind of connection structure and drill collar pipe nipple male and female head with brill instrument drill collar |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116950577A (en) * | 2023-09-19 | 2023-10-27 | 中海油田服务股份有限公司 | Conversion nipple of logging while drilling instrument |
| CN116950577B (en) * | 2023-09-19 | 2023-11-21 | 中海油田服务股份有限公司 | Conversion nipple of logging while drilling instrument |
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| Publication number | Publication date |
|---|---|
| CN111878001B (en) | 2022-06-03 |
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