How to filter the Deliveries

Hi All

I need one logic to filter thye deliveries

I have 100 deliveries LIKP-VBELN

I need to filter deliveries whose value WRF1-BETRP =1000

I need to pass LIKP -KUNNR to WRF1 -LOCNR and needs to find WRF1- BETRP field value=1000

how to get those deliveries because there is no value of Delivery number in WRF1

Thanks

SAP MM