CN217028815U

CN217028815U - Drill rod grouting joint with replaceable filter

Info

Publication number: CN217028815U
Application number: CN202220553772.8U
Authority: CN
Inventors: 王存志; 李萌博; 赵锦栋; 边培明; 罗飞; 马千里; 丁晓华; 张明浩
Original assignee: Shenzhen Baiqin Drilling Technology Co ltd
Current assignee: Shenzhen Baiqin Drilling Technology Co ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-07-22
Anticipated expiration: 2032-03-14

Abstract

The utility model relates to the technical field of petroleum and natural gas drilling equipment, in particular to a drill rod grouting joint with a replaceable filter, which comprises a joint body, wherein an inner cavity for exhausting is arranged in the joint body, a sealing cover is arranged at one end of the joint body, an opening for air inlet is arranged at the other end of the joint body, an inner pipeline for circulating drilling fluid is inserted in the sealing cover, the inner pipeline extends out of the opening, an exhaust pipe is inserted in the side wall of the joint body and is communicated with the inner cavity, and gas enters the inner cavity from the opening and is exhausted through the exhaust pipe; the filter extends out of the opening of the joint, so that the erosion condition and the impurity quantity of the filter can be conveniently and visually checked, and the filter is efficient and convenient; the filter is connected with the inner pipeline in a threaded mode, the replacement process is simple and convenient, and the replacement can be completed by using a pipe wrench.

Description

Drill rod grouting joint with replaceable filter

Technical Field

The utility model relates to the technical field of petroleum and natural gas drilling equipment, in particular to a drill rod grouting joint with replaceable filters.

Background

Because the grouting by using the mud large pump has the risk of hurting people at high pressure, in order to reduce the accident risk, part of oil areas require the grouting pump to be used for low-pressure grouting, namely, the low-pressure grouting pump is used for pumping the drilling fluid into the grouting hose, and then the grouting hose is directly inserted into the drill rod for grouting. The drill rod filter cannot be placed in the grouting process, and impurities such as rock debris particles carried in drilling fluid directly enter the inner cavity of the drill string and settle downwards to form aggregation at the bottom, so that bottom tools and instruments are easily blocked. And the hose direct-insert type grouting cannot be connected with an exhaust pipeline and anti-splashing equipment, so that the rising of bubbles in a drill string often causes the back-spraying of drilling fluid and the pollution of a drill table surface.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drill rod grouting joint with replaceable filters, aiming at solving the defects and shortcomings of the prior art.

In order to achieve the purpose, the technical scheme adopted by the utility model is that the drill rod grouting joint with the replaceable filter comprises a joint body, wherein an inner cavity used for exhausting is formed in the joint body, a sealing cover is arranged at one end of the joint body, an opening used for air inlet is formed in the other end of the joint body, an inner pipeline used for circulating drilling fluid is inserted into the sealing cover and extends out of the opening, an exhaust pipe is inserted into the side wall of the joint body and is communicated with the inner cavity, and gas enters the inner cavity from the opening and is exhausted through the exhaust pipe.

Preferably, the inner pipe includes a transverse portion and a vertical portion, the transverse portion is perpendicular to the vertical portion, and the vertical portion is inserted on the sealing cover and extends out of the opening.

Preferably, the one end of perpendicular portion is connected with and is used for filterable filter, be provided with a plurality of through-hole on the filter, the external diameter of filter reduces along its length direction gradually, the great one end of filter external diameter with the one end threaded connection of perpendicular portion.

Preferably, the two sides of the sealing cover are oppositely provided with screwing force applying rods.

Preferably, one end of the transverse part is provided with a first external thread structure for connecting with a grouting hose.

Preferably, one end of the exhaust pipe is provided with a second external thread structure for connection with an exhaust hose.

Preferably, the other end of the connector body is provided with a connector male buckle connected with the drill rod female buckle.

Preferably, the central axis of the vertical portion coincides with the central axis of the joint body.

The utility model has the beneficial effects that:

the utility model provides a drill rod grouting joint with a replaceable filter, which is matched with a grouting hose, an exhaust hose and a drill rod for use, can effectively filter large-particle impurities in drilling fluid and prevent underground tools and instruments from being blocked; the filter extends out of the opening of the joint, so that the erosion condition and the impurity quantity of the filter can be conveniently and visually checked, and the filter is efficient and convenient; the filter is connected with the inner pipeline in a threaded mode, the replacement process is simple and convenient, and the replacement can be finished by using a pipe wrench; different downhole tools have different requirements on the filtration of the drilling fluid, and the filter with the proper filtration pore diameter can be replaced according to different requirements, so that the application range is wide; the exhaust pipe can exhaust air and can also exhaust excessive drilling fluid, so that the drilling table surface is prevented from being polluted; the tightening stress application rod can manually tighten the joint body and can be used as a force application point for moving and lifting the joint body, and the tightening stress application rod is convenient and practical.

Drawings

FIG. 1 is a cross-sectional view of a replaceable filter drill pipe grout joint of the present invention;

FIG. 2 is a perspective view of a filter-replaceable drill pipe grout joint of the present invention.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings, which are simplified schematic drawings and only schematically illustrate the basic structure of the utility model, and the direction of the embodiment is based on the direction of fig. 1.

As shown in fig. 1 and 2, a drill pipe grouting joint with a replaceable filter comprises a joint body 1, an inner cavity 11 used for exhausting is formed in the joint body 1, a sealing cover 12 is arranged at one end of the joint body 1, an opening 13 used for air intake is formed in the other end of the joint body 1, an inner pipeline 2 used for circulating drilling fluid is inserted into the sealing cover 12 and connected in a welding mode, the inner pipeline 2 extends out of the opening 13, an exhaust pipe 3 is inserted into the side wall of the joint body 1 and connected in a welding mode, the exhaust pipe 3 is communicated with the inner cavity 11, and gas enters the inner cavity 11 from the opening 13 and is exhausted through the exhaust pipe 3.

The exhaust pipe 3 is disposed near one end of the sealing cover 12 to increase the distance between the opening 13 and the exhaust pipe 3, thereby preventing the slurry from overflowing from the exhaust pipe 3 along with the gas discharged back during the grouting process as much as possible. If the drilling fluid fills the inner cavity 11, the exhaust pipe 3 can also exhaust excessive drilling fluid, so that the drilling fluid is prevented from polluting the drilling platform surface. The exhaust pipe 3 may be an L-shaped pipe and inserted into the seal cover 12.

Interior pipe

2 and 3 settings of blast pipe can guarantee that interior pipe 2 has the biggest diameter under the unchangeable condition of the external diameter of joint body 1 at the terminal surface of difference, and interior pipe 2 is thicker, and intensity is bigger, and the efficiency of grout can be higher like this, and interior pipe 2 life-span also can be longer. Since the slurry is a solid-liquid mixture after all, the thicker the inner pipeline 2 is, the smaller the flow velocity is, and the smaller the erosion is under the same slurry flow rate.

The inner pipe 2 comprises a transverse portion 21 and a vertical portion 22, the transverse portion 21 is perpendicular to the vertical portion 22, and the vertical portion 22 is inserted on the sealing cover 12 and extends out of the opening 13. The connected grouting hose is horizontally placed when not in use, so if the grouting hose is to be connected, the horizontal connector is preferably connected with the grouting hose conveniently, if the inner pipeline 2 is a straight pipeline, the grouting hose needs to be bent for one section to be connected with the inner pipeline 2, the grouting hose which is bent too much is easy to damage, and therefore the transverse part 21 and the vertical part 22 are vertically connected to form an L-shaped channel to be connected with the grouting hose more conveniently. Meanwhile, the length of the lower end of the vertical part 22 extending out of the male connector buckle 14 is 2 times of the thickness of the pipe wrench, so that the pipe wrench is convenient to disassemble and replace the filter 4.

The one end of perpendicular portion 22 is connected with and is used for filterable filter 4, is provided with a plurality of through-hole 41 on filter 4, and through-hole 41 evenly distributed is on filter 4, and filter 4's external diameter reduces gradually along its length direction, the great one end of filter 4 external diameter and the one end threaded connection of perpendicular portion 22.

The appearance of filter 4 is similar to round platform form, and its external diameter reduces along the flow direction of drilling fluid, can increase the velocity of flow of drilling fluid like this to increase the dynamics that drilling fluid flowed into the drilling rod, thereby make the gas in the drilling rod discharge more fast. The filter 4 can effectively filter large-particle impurities in the drilling fluid and prevent underground tools and instruments from being blocked; the filter 4 extends out of the opening 13 of the joint body 1, so that the erosion condition and the impurity quantity of the filter 4 can be conveniently and visually checked, and the joint is efficient and convenient; the filter 4 is connected with the vertical part 22 of the inner pipeline 2 in a threaded mode, the replacement process is simple and convenient, and the replacement can be completed by using pipe tongs.

The two sides of the sealing cover 12 are oppositely provided with screwing stress application rods 5. Specifically, the screwing stressing rod 5 is two metal rods, which are vertically inserted and welded on two sides of the sealing cover 12, and the length of the screwing stressing rod 5 is 10cm greater than the distance between the liquid inlet end surface of the transverse part 21 and the side wall of the joint body 1, so as to facilitate the lifting of the joint body 1 and the installation of a drill rod.

One end of the lateral portion 21 is provided with a first male screw structure 23 for connection with a grout hose.

One end of the exhaust pipe 3 is provided with a second external thread structure 31 for connection with an exhaust hose.

The other end of the joint body 1 is provided with a joint pin 14 for connecting with a drill pipe box. The connector pin 14 is a rotary shoulder type thread of an oil and gas industry standard, and the parameters of the strength, the wall thickness and the like of the connector pin are matched with those of the drill rod box.

The central axis of the vertical portion 22 coincides with the central axis of the joint body 1. Can balance the atress that connects body 1 like this, prevent to connect body 1 atress inequality to appear crooked, be unfavorable for work.

During grouting, the connector pin 14 is first connected to the drill rod box and manually screwed by rotating the screwing and stressing rod 5, and then the grouting hose is connected to the first male screw structure 23 of the transverse portion 21 and the exhaust hose is connected to the second male screw structure 31 of the exhaust pipe 3. The grouting pump is started to pour drilling fluid, the drilling fluid reaches the filter 4 along the inner pipeline 2, impurities such as rock debris are left in the filter 4, the filtered drilling fluid flows into the inner cavity of the drill rod through the through hole 41 of the filter 4, gas in the inner cavity of the drill rod is replaced, enters the inner cavity 11 through the opening 13 of the joint body 1, and finally flows into the exhaust hose through the exhaust pipe 3. Drilling fluid can be full of the inner chamber 11 who connects body 1 completely when the grout is accomplished, and drilling fluid flows out from 3 mouths of pipe of blast pipe, stops the grout this moment, dismantles grout joint 8 when treating the liquid level and descend to the drilling rod box, accomplishes the grout. The drill rod grouting joint with the replaceable filter has the advantages of simple structure and low cost, and can effectively solve the problems of drilling fluid filtration and drilling fluid back-spray in the grouting process.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a drilling rod grout joint of removable filter which characterized in that: including connecting body (1), be provided with in the joint body (1) and be used for carminative inner chamber (11), the one end that connects body (1) is provided with sealed lid (12), the other end that connects body (1) is provided with opening (13) that are used for admitting air, insert on sealed lid (12) and be equipped with interior pipeline (2) that are used for circulating the drilling fluid, interior pipeline (2) extend to outside opening (13), it is equipped with blast pipe (3) to insert on the lateral wall of connecting body (1), blast pipe (3) with inner chamber (11) intercommunication, gaseous follow opening (13) department gets into inner chamber (11) via blast pipe (3) are discharged.

2. The filter-replaceable drill pipe grouting joint of claim 1, wherein: the inner pipeline (2) comprises a transverse part (21) and a vertical part (22), the transverse part (21) is perpendicular to the vertical part (22), and the vertical part (22) is inserted on the sealing cover (12) and extends out of the opening (13).

3. The filter-replaceable drill pipe grout joint of claim 2, wherein: the one end of erecting portion (22) is connected with and is used for filterable straining son (4), strain and be provided with a plurality of through-hole (41) on son (4), the external diameter of straining son (4) reduces along its length direction gradually, strain the great one end of son (4) external diameter with the one end threaded connection who erects portion (22).

4. The filter-replaceable drill pipe grouting joint of claim 3, wherein: and two sides of the sealing cover (12) are oppositely provided with screwing stress application rods (5).

5. The filter-replaceable drill pipe grouting joint of claim 4, wherein: one end of the transverse part (21) is provided with a first external thread structure (23) used for being connected with a grouting hose.

6. The filter-replaceable drill pipe grouting joint of claim 5, wherein: one end of the exhaust pipe (3) is provided with a second external thread structure (31) used for being connected with an exhaust hose.

7. The filter-replaceable drill pipe grouting joint of claim 6, wherein: and the other end of the joint body (1) is provided with a joint male buckle (14) connected with the drill rod female buckle.

8. The filter-replaceable drill pipe grouting joint of claim 7, wherein: the central axis of the vertical part (22) is superposed with the central axis of the joint body (1).