CN210798890U

CN210798890U - Slurry supplementing short joint for trenchless directional drilling

Info

Publication number: CN210798890U
Application number: CN201921767860.2U
Authority: CN
Inventors: 朱巍; 黄增元
Original assignee: Zhongyi Hengtong Construction Investment Development Group Co ltd
Current assignee: Zhongyi Hengtong Construction Investment Development Group Co ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-06-19
Anticipated expiration: 2029-10-21

Abstract

The utility model discloses a slurry supplementing pup joint for trenchless directional drilling, which comprises a pup joint drill collar and a sleeve, wherein a support ring is welded on the outer wall of the pup joint drill collar; the pipe wall of the short-circuit drill collar is provided with a plurality of slurry discharge through grooves; the sleeve is provided with a plurality of through holes on the cylinder walls at two sides of the support ring; the support ring bottom is provided with the draw-in groove in the both sides that are close to the short circuit drill collar head and the tail, the sleeve is provided with the spread groove in its both ends and the contact department of short circuit drill collar, be provided with the sealed cowling in spread groove and the draw-in groove. The utility model discharges the mud into the cavity of the sleeve through the mud discharging through hole, and then discharges the mud through the cavity and the through hole, thereby increasing the flowing speed of the mud, and avoiding accidents such as drill chip accumulation, drill sticking and the like; in addition, operators can assemble and disassemble the sealing covers arranged in the connecting grooves and the clamping grooves according to different conditions, so that the number of the slurry discharging through grooves in direct contact with the cavity is controlled; the sealing effect is enhanced by the sealing gasket which is adhered to the bottom of the sealing cover.

Description

Slurry supplementing short joint for trenchless directional drilling

Technical Field

The utility model relates to a directional drilling technical field specifically is a mend thick liquid short circuit for non-excavation directional drilling.

Background

The directional drilling is a pipeline construction process in the engineering technology industry, is generally used for the construction of petroleum, natural gas and some municipal pipelines, and is carried out by a large-scale directional drilling machine after the processes of drilling, reaming, cleaning holes and the like. The non-excavation refers to a new construction technology for laying, replacing and repairing various underground pipelines by using various rock-soil drilling equipment and technical means under the condition of excavating on a tiny part of the earth surface in the modes of guiding, directional drilling and the like. In the long-distance construction of the trenchless directional drill, the slow flow rate of slurry in the hole is caused by the overlong construction distance, so that the accidents of drill chip accumulation, drill jamming, drill holding and the like are caused.

In order to avoid the above situation, a patent entitled "slurry supplementing short joint for trenchless directional drilling" with the publication number of CN208280915U includes short joint body, casing pipe, water nozzle and other parts, and increases the flow rate of slurry in the hole through the water nozzle on the short joint body and the through hole on the casing pipe, improves the carrying amount of drill cuttings in unit time, and avoids the deposition and accumulation of the drill cuttings. The short circuit body and the sleeve are required to be processed before use, so that whether the construction use requirements are met is unknown, and at least time cannot be saved for construction which is necessary for minutes and seconds; and above-mentioned patent only relies on the pipe wall and the short circuit body of sleeve pipe to be connected, and stability and fastness are difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mend thick liquid short circuit for directional brill of non-excavation to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a grout joint for trenchless directional drilling comprising: the short-circuit drill collar comprises a short-circuit drill collar and a sleeve, wherein a support ring is welded on the outer wall of the short-circuit drill collar, and one side of the support ring, which is far away from the short-circuit drill collar, is welded with the sleeve; the pipe wall of the short-circuit drill collar is provided with a plurality of slurry discharge through grooves which are arranged in a staggered manner; the sleeve is provided with a plurality of through holes on the cylinder walls at two sides of the support ring, and the through holes are distributed in a staggered manner; the support ring bottom is provided with the draw-in groove in the both sides that are close to the short circuit drill collar head and the tail, the sleeve is provided with the spread groove in its both ends and the contact department of short circuit drill collar, be provided with the sealed cowling in spread groove and the draw-in groove.

As a further aspect of the present invention: the sleeve is provided with cavities for slurry to flow on two sides of the support ring.

As a further aspect of the present invention: connecting blocks with trapezoidal cross sections are welded at the two ends of the sleeve.

As a further aspect of the present invention: the one end welding that the support ring was kept away from to the sealed cowling has the spliced pole, the spliced pole has the screw through threaded connection, the sealed cowling passes through screw and connecting block fixed connection.

As a further aspect of the present invention: and a sealing gasket is arranged between the sealing cover and the short-circuit drill collar and is bonded at the bottom of the sealing cover.

As a further aspect of the present invention: the through holes and the slurry discharging through grooves are distributed in a staggered mode.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discharges the mud into the cavity of the sleeve through the mud discharging through hole, and then discharges the mud through the cavity and the through hole, thereby increasing the flowing speed of the mud, and avoiding accidents such as drill chip accumulation, drill sticking and the like; in addition, operators can assemble and disassemble the sealing covers arranged in the connecting grooves and the clamping grooves according to different conditions, so that the number of the slurry discharging through grooves in direct contact with the cavity is controlled; the sealing effect is enhanced by the sealing gasket which is adhered to the bottom of the sealing cover.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of a portion B in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a slurry supplementing short circuit for trenchless directional drilling includes: the short-circuit drill collar comprises a short-circuit drill collar 1 and a sleeve 2, wherein a support ring 3 is welded on the outer wall of the short-circuit drill collar 1, and one side, far away from the short-circuit drill collar 1, of the support ring 3 is welded with the sleeve 2. The drill collar is located at the lowest part of the drill string and is the main component of the lower drilling assembly. Its main features are large wall thickness, and high gravity and rigidity. For the work of conveniently tripping, can hang draw-in groove and slip groove at the internal screw thread surface processing of drill collar, the utility model discloses a short circuit drill collar 1's both ends are connected with the drilling rod through the screw thread respectively. The pipe wall of the short-circuit drill collar 1 is provided with a plurality of slurry discharge through grooves 11, and the slurry discharge through grooves 11 are distributed in a staggered manner; the sleeve 2 is provided with a plurality of through holes 21 on the cylinder wall at two sides of the support ring 3, and the through holes 21 are distributed in a staggered manner. The through holes 21 and the slurry discharge through grooves 11 are respectively arranged in a staggered mode, namely on different cross sections, so that the short-circuit drill collar 1 or the sleeve 2 is prevented from being broken due to the fact that the slurry discharge through grooves 11 or the through holes 21 on one cross section are too many. The through holes 21 and the slurry discharge through grooves 11 are arranged in a staggered manner, and cavities 23 for slurry to flow are formed in the two sides of the support ring 3 of the sleeve 2. Each through hole 21 and each slurry discharge through groove 11 are not in a cross section, so that the flow of slurry in the cavity 23 can be promoted, and the flow speed of the slurry can be increased.

Referring to fig. 2, connecting blocks 24 with trapezoidal cross sections are welded to both ends of the sleeve 2. The connecting block 24 can be used together with the screw 5, and the connection stability between the sealing cover 4 and the sleeve 1 is increased. The one end welding that the support ring 3 was kept away from to sealed cowling 4 has spliced pole 41, spliced pole 41 has screw 5 through threaded connection, sealed cowling 4 is through screw 5 and spliced pole 24 fixed connection. The operator can be according to the difference of the condition, selects the installation or dismantles the sealed cowling 4, and the sealed cowling 4 is the valve that the thick liquid of arranging leads to between groove 11 and the cavity 23, and the accessible control sealed cowling 4 controls the row's thick liquid that leads to the groove 11 quantity with cavity 23 direct contact, controls with this the utility model discloses a arrange the thick liquid ability.

Referring to fig. 3, the bottom of the support ring 3 is provided with two slots 31 at two ends near the short circuit drill collar 1, the sleeve 2 is provided with a connecting slot 22 at the contact position between the two ends of the sleeve and the short circuit drill collar 1, and the sealing covers 4 are arranged in the connecting slot 22 and the slots 31. A sealing gasket 6 is arranged between the sealing cover 4 and the short-circuit drill collar 1, and the sealing gasket 6 is bonded at the bottom of the sealing cover 4. The sealing effect is enhanced by the sealing washer 6 adhered to the bottom of the sealing cap 4.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A grout joint for trenchless directional drilling comprising: short circuit drill collar (1) and sleeve (2), its characterized in that: the outer wall of the short-circuit drill collar (1) is welded with a support ring (3), and one side, far away from the short-circuit drill collar (1), of the support ring (3) is welded with the sleeve (2); the pipe wall of the short-circuit drill collar (1) is provided with a plurality of slurry discharge through grooves (11), and the slurry discharge through grooves (11) are distributed in a staggered manner; the sleeve (2) is provided with a plurality of through holes (21) on the cylinder walls at two sides of the support ring (3), and the through holes (21) are distributed in a staggered manner; the support ring (3) bottom is provided with draw-in groove (31) near the both sides of short circuit drill collar (1) head and the tail, sleeve (2) are provided with spread groove (22) in its both ends and the contact department of short circuit drill collar (1), be provided with sealed cowling (4) in spread groove (22) and draw-in groove (31).

2. The grout joint for trenchless directional drilling of claim 1, wherein: the sleeve (2) is provided with cavities (23) for slurry to flow on two sides of the support ring (3).

3. The grout joint for trenchless directional drilling of claim 2, wherein: connecting blocks (24) with trapezoidal cross sections are welded at the two ends of the sleeve (2).

4. The grout joint for trenchless directional drilling of claim 3, wherein: the one end welding that support ring (3) was kept away from in sealed cowling (4) has spliced pole (41), spliced pole (41) have screw (5) through threaded connection, sealed cowling (4) are through screw (5) and connecting block (24) fixed connection.

5. The grout joint for trenchless directional drilling of claim 4, wherein: a sealing gasket (6) is arranged between the sealing cover (4) and the short-circuit drill collar (1), and the sealing gasket (6) is bonded to the bottom of the sealing cover (4).

6. The grout joint for trenchless directional drilling of claim 1, wherein: the through holes (21) and the slurry discharge through grooves (11) are distributed in a staggered manner.