A while-drilling bottom hole pressure and temperature measuring device

Abstract

This invention discloses a bottom-hole pressure and temperature measurement device for drilling, belonging to the field of oil well logging technology. It includes a derrick mounted on a drill platform, which is installed on the ground and connected to a non-magnetic suspended drill collar. The non-magnetic suspended drill collar drills into the ground and houses a pressure and temperature measurement module. Multiple limiting grooves are formed around the pressure and temperature measurement module. This bottom-hole pressure and temperature measurement device, through the use of an annular airbag and limiting structures, and inflation via a one-way air inlet valve, causes the annular airbag to expand and compress the limiting components, allowing them to enter the limiting grooves. This provides rapid fixation of the pressure and temperature measurement module and allows for multi-point fixation of the module simultaneously, improving its installation stability and preventing it from falling off.

Description

Technical Field

[0001] This invention belongs to the field of petroleum logging technology, specifically a bottom hole pressure and temperature measurement device for drilling. Background Technology

[0002] In actual drilling, as the wellbore depth increases, the instability of the wellbore increases. In some rock formations, the wellbore may shrink due to rebound, which can lead to stuck pipe in severe cases. In other rock formations, the wellbore may collapse, causing the wellbore to enlarge. By obtaining the pressure and temperature parameters at the bottom of the well in real time and calculating the equivalent circulation density of the drilling mud, the density of the injected drilling mud can be adjusted to reduce the occurrence of accidents.

[0003] Currently, pressure and temperature measurement modules in existing technologies are generally fixed by a single fixing pin passing through the side wall of the non-magnetic suspension drill collar. This single-point fixing method is not only less secure, but also causes gaps to form between the fixing pin and the side wall of the non-magnetic suspension drill collar after prolonged use, resulting in side leakage and affecting subsequent use. Summary of the Invention

[0004] To overcome the above-mentioned defects, the present invention provides a bottom-hole pressure and temperature measuring device for drilling, which solves the problem that the pressure and temperature measuring module in the prior art is generally fixed by a single fixing pin passing through the side wall of the non-magnetic suspension drill collar. The single-point fixing method is not only not very firm, but also causes gaps to form between the fixing pin and the side wall of the non-magnetic suspension drill collar after long-term use, resulting in side leakage of the side wall of the non-magnetic suspension drill collar, which affects subsequent use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bottom-hole pressure and temperature measuring device for drilling, comprising a derrick, the derrick being mounted on a drilling platform, the drilling platform being installed on the ground and connected to a non-magnetic suspended drill collar, the non-magnetic suspended drill collar being drilled into the soil, and a pressure and temperature measuring module being built into the non-magnetic suspended drill collar, the pressure and temperature measuring module having multiple limiting grooves on its periphery, and limiting structures engaging on the limiting grooves, the multiple limiting structures being fixedly connected to the outside of the pressure and temperature measuring module, and annular airbags being provided on the multiple limiting structures and sleeved on the outside of the pressure and temperature measuring module.

[0006] As a further aspect of the present invention: the two sides of the non-magnetic suspended drill collar are connected to both ends of the mud manifold, and one end of the mud manifold is connected to the mud pump.

[0007] As a further embodiment of the invention: the other end of the mud manifold extends into a mud pit, and the mud pit is mounted on the land.

[0008] As a further aspect of the present invention: the bottom of the non-magnetic suspended drill collar is assembled and connected with the non-magnetic drill collar.

[0009] As a further embodiment of the present invention: a one-way air outlet valve and a one-way air inlet valve are respectively provided on both sides of the annular airbag, and the one-way air inlet valve and the one-way air outlet valve are located in the annular opening. The annular opening is located outside the non-magnetic suspended drill collar, and a sealing ring is fitted in the annular opening.

[0010] As a further aspect of the present invention: the limiting structure includes a limiting member, the limiting member engaging with the limiting groove, the upper end of the limiting member being hinged to two connecting blocks via a pin, and a torsion spring being fixedly connected between the two connecting blocks, with one end of each torsion spring being fixedly connected to both sides of the limiting member.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. This downhole pressure and temperature measurement device, through the setting of an annular airbag and a limiting structure, and the inflation operation through a one-way air inlet valve, causes the annular airbag to expand and squeeze the limiting component to move, so that the limiting component enters the limiting groove, which can quickly fix the pressure and temperature measurement module. Moreover, it can simultaneously perform multi-point fixing of the pressure and temperature measurement module, improve the installation stability of the pressure and temperature measurement module, and prevent the pressure and temperature measurement module from falling off.

[0013] 2. The downhole pressure and temperature measuring device is designed to seal the annular opening by setting a sealing ring that fits into the annular opening. This reduces gaps and prevents side leakage from affecting the use of the non-magnetic suspended drill collar. It also protects the annular airbag. Attached Figure Description

[0014] Figure 1 This is a frontal structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional cross-sectional structural diagram of the non-magnetic drill collar of the present invention.

[0016] Figure 3 This is a three-dimensional structural schematic diagram of the pressure and temperature measurement module of the present invention.

[0017] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0018] Figure 5 This is a three-dimensional structural diagram of the limiting structure of the present invention.

[0019] In the diagram: 1. Derrick, 2. Drilling platform, 3. Mud manifold, 4. Mud pump, 5. Mud pit, 6. Annular airbag, 7. Non-magnetic suspended drill collar, 8. Non-magnetic drill collar, 9. Limiting structure, 91. Connecting block, 92. Limiting component, 10. Pressure and temperature measurement module, 11. Limiting groove, 12. Sealing ring. Detailed Implementation

[0020] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0021] like Figure 1-5 As shown, the present invention provides a technical solution: a drilling bottom pressure and temperature measuring device, including a derrick 1, which is installed on a drilling platform 2. The drilling platform 2 is installed on the ground and is connected to a non-magnetic suspended drill collar 7. The two sides of the non-magnetic suspended drill collar 7 are connected to both ends of a mud manifold 3. One end of the mud manifold 3 is connected to a mud pump 4, and the other end of the mud manifold 3 extends into a mud pit 5. The mud pit 5 is installed on the ground and plays a role in collecting mud to prevent mud from spreading outward and affecting the surrounding environment.

[0022] The bottom of the non-magnetic suspension drill collar 7 is assembled and connected to the non-magnetic drill collar 8, and the non-magnetic suspension drill collar 7 drills into the soil. The non-magnetic suspension drill collar 7 has a built-in pressure and temperature measurement module 10. Multiple limiting grooves 11 are formed around the pressure and temperature measurement module 10, and limiting structures 9 engage with the limiting grooves 11. The limiting structure 9 includes a limiting member 92, which engages with the limiting groove 11. The upper end of the limiting member 92 is hinged to two connecting blocks 91 via a pin. Torsion springs are fixedly connected between the two connecting blocks 91. One end of the torsion spring is fixedly connected to both sides of the limiting member 92. The spring is inflated by a one-way air inlet valve, which causes the annular airbag 6 to expand and squeeze the limiting member 92 to move. This allows the limiting member 92 to enter the limiting groove 11, which can quickly fix the pressure and temperature measurement module 10. It can also fix the pressure and temperature measurement module 10 at multiple points at the same time. In addition, the torsion of the torsion spring can cause the bottom of the limiting member 92 to lift up, thereby causing the limiting member 92 to automatically disengage from the limiting groove 11, which facilitates the removal of the pressure and temperature measurement module 10.

[0023] Multiple limiting structures 9 are fixedly connected to the outside of the pressure and temperature measuring module 10, and an annular airbag 6 is provided on the multiple limiting structures 9 and sleeved on the outside of the pressure and temperature measuring module 10. One-way air outlet valve and one-way air inlet valve are respectively provided on both sides of the annular airbag 6, and the one-way air inlet valve and one-way air outlet valve are located in the annular opening. The one-way air outlet valve facilitates the discharge of gas inside the annular airbag 6, thereby loosening the tightening of the limiting member 92, which is conducive to the limiting member 92 being removed from the limiting groove 11 to complete the dismantling operation.

[0024] The annular opening is located on the outside of the non-magnetic suspended drill collar 7, and a sealing ring 12 is fitted into the annular opening. The sealing ring 12 fits into the annular opening, thereby sealing the annular opening, reducing gaps, and preventing the non-magnetic suspended drill collar 7 from having side leakage that affects its use. At the same time, it can also protect the annular airbag 6.

[0025] The working principle of this invention is as follows: When installing the pressure and temperature measurement module 10, air is introduced through a one-way air inlet valve connected to an air pump, which fills the annular airbag 6, causing the annular airbag 6 to expand. This causes the annular airbag 6 to compress the limiting member 92 and move at an angle, allowing the limiting member 92 to enter the limiting groove 11, thus fixing the pressure and temperature measurement module 10. Then, the sealing ring 12 is pushed into the annular opening, so that the sealing ring 12 and the annular opening are fitted together. When the non-magnetic suspension drill collar 7 drills into the soil, the pressure and temperature measurement module 10 can perform pressure and temperature measurement.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A bottomhole pressure and temperature measuring device for drilling, comprising a derrick (1), characterized in that: The derrick (1) is installed on the drilling platform (2), which is installed on the ground. The drilling platform (2) is connected to the non-magnetic suspension drill collar (7), which drills into the soil. The non-magnetic suspension drill collar (7) has a built-in pressure and temperature measurement module (10). The pressure and temperature measurement module (10) has multiple limiting grooves (11) on its periphery, and limiting structures (9) are engaged on the limiting grooves (11). The multiple limiting structures (9) are fixedly connected to the outside of the pressure and temperature measurement module (10), and annular airbags (6) are provided on the multiple limiting structures (9) and sleeved on the outside of the pressure and temperature measurement module (10). The two sides of the non-magnetic suspended drill collar (7) are connected to both ends of the mud manifold (3), and one end of the mud manifold (3) is connected to the mud pump (4). The other end of the mud manifold (3) extends into the mud pit (5), and the mud pit (5) is mounted on the land; The bottom of the non-magnetic suspended drill collar (7) is assembled and connected to the non-magnetic drill collar (8); The annular airbag (6) is provided with a one-way air outlet valve and a one-way air inlet valve on both sides, and the one-way air inlet valve and the one-way air outlet valve are located in the annular opening. The annular opening is located outside the non-magnetic suspended drill collar (7), and a sealing ring (12) is embedded in the annular opening. The limiting structure (9) includes a limiting member (92), which engages with the limiting groove (11). The upper end of the limiting member (92) is hinged to two connecting blocks (91) via a pin. A torsion spring is fixedly connected between the two connecting blocks (91), and one end of the two torsion springs is fixedly connected to both sides of the limiting member (92).

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