NOV MD Totco Crown Wagner SJPETRO RGPETRO Drilling Instrument JPIM SZJ-LY Standpipe Pressure Gauge Box Mounted

描述

1. Overview

1.1 Core Function

The Standpipe Pressure Measuring Unit is a key component of the SZJ Series Drilling/Workover Rig Multi-Parameter Instrument. What’s app +8615972752793 Luben@youlongpetro.com.It accurately measures and displays the mud pressure in the standpipe during drilling operations in real time. This data helps drillers monitor downhole conditions, optimize drilling processes, and identify potential hazards, ensuring safe and efficient operations.

1.2 Technical Specifications

Parameter	Specification
Working Temperature	Normal-temperature type: -30℃ ～ 70℃; Low-temperature type: -45℃ ～ 55℃
Relative Humidity	0% ～ 90% (non-condensing)
Measuring Range	0 ～ 40 MPa
Measurement Error	≤ ±1.5% F.S (Full Scale)
Pressure Transmission Medium	45# Transformer Oil
Transmitter Output Signal	4 ～ 20 mA current signal
Transmitter Power Supply	+24 VDC

1.3 System Composition

The unit consists of four interrelated components that work synergistically to achieve accurate pressure measurement and data transmission:

1. Standpipe Pressure Sensor: Two types are available—diaphragm-type (cup-type) and piston-type,What’s app +8615972752793Luben@youlongpetro.com both converting mud pressure into hydraulic pressure.
2. Standpipe Pressure Indicator: Installed in the driller’s console, it receives hydraulic signals and displays pressure values via a pointer.
3. Pressure Transmitter: Converts hydraulic pressure signals into 4～20 mA current signals for data acquisition and remote transmission.What’s app +8615972752793Luben@youlongpetro.com
4. Connecting Components: Include hydraulic hoses (10m or 15m), quick connectors, three-way joints, and sealing elements (O-rings, gaskets).

Figure 1: Schematic Diagram of Standpipe Pressure Measuring Unit (Including sensor, indicator, transmitter, hydraulic hoses, and data collector)

2. Working Principle

The unit operates based on hydraulic pressure transmission and mechanical-electrical signal conversion, What’s app +8615972752793 Luben@youlongpetro.comfollowing a precise workflow:

5. Pressure Sensing:
   Diaphragm-type Sensor: Mud pressure in the standpipe acts on the elastic diaphragm (rubber cup) inside the sensor, compressing the internal hydraulic oil to generate pressure.
6. Piston-type Sensor: Mud pressure pushes the piston, What’s app +8615972752793Luben@youlongpetro.comtransferring mechanical force to the hydraulic oil to form stable pressure.
7. Hydraulic Signal Transmission: The generated hydraulic pressure is transmitted to the bourdon tube of the pressure indicator through oil-resistant hydraulic hoses.
8. Mechanical Display: The bourdon tube deflects proportionally to the hydraulic pressure. This deflection is amplified by a mechanical mechanism (connecting rod, bevel gear), What’s app +8615972752793Luben@youlongpetro.comdriving the indicator pointer to display the standpipe pressure value.
9. Electrical Signal Conversion: A three-way joint diverts part of the hydraulic pressure to the pressure transmitter, What’s app +8615972752793Luben@youlongpetro.comwhich converts it into a 4～20 mA current signal (0 MPa corresponds to 4 mA, 40 MPa corresponds to 20 mA).
10. Data Processing: The current signal is transmitted to the data collector,What’s app +8615972752793Luben@youlongpetro.com then displayed on the driller’s console LCD/touchscreen and remotely sent to the duty room computer via wireless communication for recording and analysis.
11. Installation, Adjustment and Operation

3.1 Installation Preparation

11. Shut down the mud pump and relieve all pressure in the standpipe system before installation.
12. Prepare tools and materials: welding equipment, wrenches, PTFE tape, 45# transformer oil, replacement diaphragms/piston seals, What’s app +8615972752793Luben@youlongpetro.comand a hand pump (Model: Q/JY250-84).
13. Verify sensor specifications match the standpipe size and pressure rating; check for damage to sensors, hoses, or connectors.

3.2 Sensor Installation

Install the sensor vertically at a height of approximately 2m on the drill floor for easy maintenance. The installation steps vary slightly by sensor type:

3.2.1 Diaphragm-type Sensor Installation

14. Drill a hole in the standpipe and weld a nipple with 1 1/2 NPT male threads. Ensure the weld is sealed and free of leaks.What’s app +8615972752793Luben@youlongpetro.com
15. Wrap PTFE tape around the sensor’s male union and screw it onto the nipple to form a tight seal.
16. Inject 45# transformer oil into the sensor through the self-sealing male connector. Stop when the diaphragm walls just touch (visual inspection). Overfilling will damage the diaphragm; underfilling will cause it to rupture during use.
17. Apply thread compound to the union, install the cylinder and female union, and tighten securely. What’s app +8615972752793Luben@youlongpetro.comA gate valve can be installed between the standpipe and sensor for convenient maintenance.
18. Ensure the sensor is oriented vertically upward to avoid measurement errors.

Figure 2: Installation of Diaphragm-type Standpipe Pressure Sensor

3.2.2 Piston-type Sensor Installation

19. Complete steps 1-2 as outlined for the diaphragm-type sensor.
20. Inject hydraulic oil into the sensor until the piston is fully extended (check via the observation port).
21. Install the piston assembly, tighten the wing nut, and verify the O-ring (34.5×3.55) is properly seated to prevent oil leakage.What’s app +8615972752793Luben@youlongpetro.com
22. Connect the pre-assembled hydraulic hose to the sensor’s quick connector.

Figure 3: Exploded View of Piston-type Standpipe Pressure Sensor

 

 

3.3 Indicator and Transmitter Installation

3.3.1 Pressure Indicator

23. Mount the driller’s console (equipped with the pressure indicator) in front of the driller for clear visibility.
24. Connect the hydraulic hose (marked “Standpipe Pressure Gauge”) to the corresponding connector on the console.What’s app +8615972752793Luben@youlongpetro.com
25. Adjust the damper valve to minimize pointer vibration during operation—turn clockwise to reduce vibration, counterclockwise to increase response speed.

3.3.2 Pressure Transmitter

26. Install the 0～40 MPa transmitter inside the driller’s console, securing it with a bracket to avoid vibration.
27. Wiring (follow color coding):
    Red cable: +24 VDC power supply
28. Yellow/white cable: Signal output (-)
29. Blue/black cable: Ground (optional, for anti-interference)
30. Tighten the transmitter and fittings with a torque not exceeding 40 N·m to prevent thread damage.

3.4 Hydraulic System Purging and Oil Filling

31. Connect one end of the hydraulic hose to the sensor and the other end to the driller’s console connector.
32. Open the air release valve on the console.What’s app +8615972752793Luben@youlongpetro.com Inject 45# transformer oil from the sensor’s oil filling port using a hand pump.
33. Observe the air release valve—stop injecting when continuous oil flows out (no bubbles). Close the valve and continue injecting until the indicator shows approximately 0.5 MPa (initial value).
34. If the initial value exceeds 1 MPa, slowly open the air release valve to reduce pressure to ≤0.5 MPa. What’s app +8615972752793Luben@youlongpetro.comExcessive pressure will damage the diaphragm or piston.
35. Repeat the purging process 2～3 times to ensure no air remains in the hydraulic system (air causes unstable pointer movement).

3.5 Calibration

36. Connect a piston pressure gauge to the pressure indicator as a calibration standard.
37. Gradually apply pressure from 0 to 40 MPa in 5 MPa increments. Verify the indicator pointer aligns with the standard gauge reading, with no oil leakage at connections.
38. Repeat the process during pressure reduction to check hysteresis.What’s app +8615972752793Luben@youlongpetro.com Adjust the positioning screw on the bourdon tube if the error exceeds ±1.5% F.S.
39. Maintenance and Troubleshooting

4.1 Regular Maintenance

39. Daily Inspection: Check for oil leakage at hoses, connectors, and sensors. Ensure the indicator pointer moves smoothly and the LCD display is normal.
40. Oil Maintenance: Use only clean, sediment-free 45# transformer oil.What’s app +8615972752793Luben@youlongpetro.com Replace oil every 6 months or if it becomes cloudy.
41. Seal Replacement: Replace worn diaphragms (diaphragm-type) or O-rings (piston-type) immediately if leakage is detected.What’s app +8615972752793Luben@youlongpetro.com Spare parts specifications are listed in Table 1.
42. Sensor Cleaning: Periodically remove mud, debris, or ice from the sensor surface. What’s app +8615972752793Luben@youlongpetro.comClean the diaphragm with a soft cloth to avoid contamination.

No.	Part Number	Part Name	Application
1	SZJ-LY.1-3	Diaphragm (Rubber Cup)	Diaphragm-type Sensor
2	GB3452.1-82	O-ring (34.5×3.55)	Piston-type Sensor
3	JY248-3	O-ring (12×2.4)	Connectors
4	SZJ-DN.1.4	Hydraulic Hose Assembly	General Use

Table 1: Spare Parts List for Standpipe Pressure Measuring Unit

4.2 Troubleshooting

Symptoms	Potential Causes	Remedies
Indicator pointer vibrates severely	1. Damper valve improperly adjusted2. Air trapped in hydraulic hoses3. Loose hose connections	1. Re-adjust the damper valve2. Purge air by re-injecting oil3. Tighten connectors with a wrench
No or abnormally low reading	1. Insufficient hydraulic oil2. Damaged diaphragm/piston seal3. Clogged hoses or connectors	1. Refill with 45# transformer oil2. Replace diaphragm/O-ring3. Disassemble and clean connectors
Oil leakage at sensor	1. Worn O-rings2. Loose union threads3. Cracked cylinder body	1. Replace O-rings2. Re-tighten with PTFE tape3. Replace the sensor
Abnormal transmitter signal	1. Incorrect wiring2. Transmitter damage3. Hydraulic oil contamination	1. Recheck wiring per Section 3.3.22. Replace the transmitter3. Drain and replace hydraulic oil

5. Safety Precautions
6. Always shut down the mud pump and relieve system pressure before installing, disassembling, or maintaining the unit to avoid high-pressure oil injection injuries.
7. The sensor must be installed vertically. What’s app +8615972752793Luben@youlongpetro.comHorizontal or inclined installation will cause measurement errors and accelerate seal wear.
8. Do not overfill the sensor with oil. For diaphragm-type sensors, stop filling when diaphragms touch; for piston-type sensors,What’s app +8615972752793Luben@youlongpetro.com stop when the piston is fully extended.
9. Use only 45# transformer oil as the pressure transmission medium.What’s app +8615972752793Luben@youlongpetro.com Other oils may corrode seals or clog the hydraulic system.
10. Do not exceed the maximum measuring range (40 MPa). Overpressure will permanently damage the sensor and indicator.
11. Shielded cables for the transmitter should not be routed with power cables or near high-power equipment to avoid electromagnetic interference.What’s app +8615972752793Luben@youlongpetro.com
12. Regularly inspect the standpipe nipple weld for cracks. Repair immediately if any defects are found to prevent mud leakage.
13. Storage and Transportation
14. Before transportation, What’s app +8615972752793Luben@youlongpetro.comdisconnect all hoses and cables, and install protective caps on connectors to prevent contamination.
15. Store the unit in a dry, clean environment with a temperature of -10℃～40℃ and relative humidity ≤70%.
16. Protect the sensor diaphragm/piston from impact or scratches during transportation.What’s app +8615972752793Luben@youlongpetro.com Use foam padding for packaging.

For technical support or additional information, please contact Hubei Jianghan Petroleum Instrument & Meter Co., Ltd. via the official website or contact details provided.

E17-152 Gauge Protectors	CD106X CD136X CWBD4XX	SZJ-LY.3 SZJ-LY.1-5 SZJ-LY.2 SZJ-LY.2A SZJ-DN.1.4 SZJ-LY.1A SZJ-LY.1A.3-1 SZJ-LY.1-3 KYB600-40 1502 1502 1502 SZJ-LY.1-1 SZJ-LY.1-2 SZJ-LY.1-9 SZJ-LY.1-6 SZJ-LY.1-4 JY248.2 JY248-4 SZJ-LY.1-7 SZJ-LY.1-8 JY248-3 JY248.6
E40-1	CD200
E10032B	CD401

SJPETRO#RGPETRO#DFXK#ZYT#BPMCO#LANSHI#NOV#NATIONAL OILWELL WARCO#KERUI#HH#HONGHUA#BAOJI#BOMCO#CPTDC#SJ

Contact info
What’s app +8615972752793 Luben@youlongpetro.com

You Long Petroleum Machinery Spares ltd.(YOU LONG PETRO) engages in the export of the petroleum equipment and materials and provides materials and equipment for CNPC and SINOPEC’s overseas projects. Established in 2003,YOU LONG PETRO has started the manufacturing and supplying of petroleum materials and equipment since 2003.YOU LONG PETRO has provided its products and services to 36 countries and regions across the globe.YOU LONG PETRO’s export performance has come out top in central enterprises in successive years and it has been acknowledged as China’s largest supplier of petroleum and petrochemical materials,which is based on design,production,sale and technical service.Our products are completely interchangeable with the following enterprises.
The products are asfollows:
1,Drilling mud pump parts(Bomco, HH, Rongsheng, RJ etc.)
2,Oil drilling rig parts & Workover rig parts (RG, SJPETRO,DFXK etc),
3,Parts for hydraulic disc brake (BPM,Boke,Bomco,RG)
4,ATDPush-plate clutch What’s app +8615972752793 Luben@youlongpetro.com and parts & WCB2 Auxiliary brake parts.
5,ZQ Drill pipe power tongs and parts,TQ Series of casing power tongs and parts.
6,CB/LT series:Air tube clutch and parts.
7,Agent products such as: Bearings, Chains, Cardan shaft,V-belt,engine etc

#drilling #rig #mudpump #liner #drillingrig #oilwell #equipment #vendor #supplier #oilrig #hopps #China #factory #pump #petroleum #oil #gas #valve #piston #nov #gardnerdenver #bomco #drillmec #weatherford #ideco #spm #emsco #Halliburton #Schlumberger #BakerHughes
#cylinder #cylinderliner #drillingrigs #drillingcrew #oilfield #waterwell #oilwell #suppliers #parts #triplex #duplex #varco #elliswilliams #lewco #rongsheng #lsnow #russian #halliburton #upetrom #opi #americanblock #soilmec #tfi #BJPacemaker #FZFXZ #FGFXG #FDFXX #FDFXD #FYFXX #FYFXD #FOFXO #FKFXK #FCFXX #FCFXO #TEE #THE #PZ7 #PZ8 #PZ9 #PZ10 #PZ11 #PZ2000 #PZ2400 #UNB600 #UNBT1180 #UNBT950 #UNBT650 #NBT300 #MP5 #MP8 #MP10 #MP13 #MP16 #F500 #F800 #F1000 #F1300 #F1600 #F2200 #DB550 #T1000 #7P50 #8P50 #9P100 #10P130 #12P160 #14P200 #14P220 #JWS340 #JWS400 Contact info What’s app +86 15972752793 Luben@youlongpetro.com #G700 #A560PT #A600PT #A850PT #A1100PT #A1400PT #A1700PT #TWS2500 #TWS400 #TWS600 #T500 #T800 #T1000 #T1300 #T1600 #7T450 #7TS600 #8T800 #9T1000 #9T1300 #10T1300 #12T1600 #14T2200 #12T1600GD #W440 #W446 #E447 #E2200 #TWS600S #TWS2250 #TWS2500 #5ZB2500 #5ZB2800 #HT400 #HT446 #3PN700 #3PN1000 #3PN1300 #3PN1600 #3PN2000 #30D #350GD #500DC #700HDL #1000HDL #K800 #K1000 #K1300 #K1600 #K2000 #K2200 #7T500 #7T508 #8T650 #RSF500 #RSF800 #RSF1000 #RSF1300 #RSF1600 #HHF500 #HHF800 #HHF1000 #HHF1300 #HHF1600 #HHF2200 #QF1600 #3NB500 #3NB800 #3NB1000 #3NB1300 #3NB1600